air-cooled reciprocating chiller - daikin applied

Product Manual PM AGR-2

Group: Chiller

Effective: February 2000

Supersedes: PM AGR-1

© 1997 McQuay International

Air-Cooled Reciprocating Chiller

AGR 070AS - 100AS, Packaged ChillerAGR 070AM – 100AM, Remote Evaporator

70 to 100 Tons, 245 to 350 kW

R-22, R-134a

60 Hertz

2 AGR 070A through 100A Product Manual AGR-2

Table of Contents

Introduction.................................................................................................................3Nomenclature......................................................................................................................................................3

Design Advantages .....................................................................................................4

Selection Procedure ....................................................................................................9Packaged Chiller, Model AS, R-22 ...................................................................................................................9Packaged Chiller, Model AS, R-134a .............................................................................................................11Remote Evaporator, Model AM.....................................................................................................................11

Application Adjustment Factors................................................................................13

Performance Data .....................................................................................................16

Part Load Data..........................................................................................................18

Sound Data ................................................................................................................19

Pressure Drop Curves ..............................................................................................22

Electrical Data...........................................................................................................23

Physical Data.............................................................................................................29AGR-AS, Packaged Chiller.............................................................................................................................29AGR-AM, Remote Evaporator.......................................................................................................................31

Dimensional Data......................................................................................................33Packaged Chiller, AGR-AS..............................................................................................................................33Remote Evaporator, AGR-AM........................................................................................................................35CDE Evaporators..............................................................................................................................................37

Application Data........................................................................................................38

Optional Features......................................................................................................46MicroTech .....................................................................................................................................................47

Product Specification, AGR-AS................................................................................48

Product Specification, AGR-AM ..............................................................................53

Our Facility is ISO 9002 Certified

"McQuay" is a registered trademark of McQuay International1997 McQuay International

"Illustrations cover the general appearance of McQuay International products at the time of publication and wereserve the right to make changes in design and construction at anytime without notice"

NOTE: The Model AGR 070AM

through AGR 100AM chillers withremote evaporators are not included in

the ARI Certification Program.

Product Manual AGR-2 AGR 070A through 100A 3

Introduction

McQuay offers air-cooled chillers from 10 through 425 tons (35 - 1500 kW). Thismanual covers two varieties of the reciprocating compressor, air-cooled GlobalChiller Line:

AGR 070 AS - AGR 100AS, Packaged Air-Cooled Chillers, R-22 and R-134a

AGR 070AM - AGR 100AM, Air-Cooled with Remote Evaporator, R-22 only

Nomenclature

A G R - XXX A S

AGR-AS Model ARI Standard 550/590-98 Certified

Features and Benefits

Efficiency• Cross-circuit compressor staging

• Copeland Discus compressors

• Exceeds ASHRAE Standard 90.1 forefficiency

Reliability• Rugged, proven compressor design

• Factory installed operating and safetycontrols

• Code and agency approval

Flexibility• Complete factory assembly and testing

• Sizes available in convenient 5 tonincrements

• Multiple control options

• Remote evaporator available (R-22 only)

• Available with HCFC-22 or HFC 134a

Serviceability• Dual refrigerant circuits

• Easy servicing -- All electrical and refrigerantcomponents are readily accessible

• Small footprint

Air-CooledGlobal

Reciprocating Compressor

Design VintageNominal Tons

ApplicationS= Standard CoolingM= Remote Evaporator


Design Advantages

ConstructionFactory assembled and mounted on heavy-gauge painted, phosphatized, galvanized steel channelbase. This base distributes the unit weight for roof loading. Flexible installation is possible by virtueof the unit’s small footprint and low sound level.

CompressorsThe AGR product line uses Copeland DISCUS valve semi-hermetic compressors. These ruggedcompressors are designed for R-22 and the high loading associated with air-cooled applications. Theyoperate under lighter loading with R-134a.

Semi-hermetic, 1750 rpm induction type motors are used. The motors are refrigerant-gas cooled.Solid-state modules in the motor terminal box respond to temperature sensors imbedded in all threemotor windings, providing inherent thermal overload protection for all run and start conditions.

The compressor housing is constructed from closed grained, high nickel content, alloy cast-iron withno bolted joint between the motor and compressor. The housing includes a cast-iron cylinder headand stator cover, and a crankcase oil sightglass. A suction strainer built into the compressor in the gasstream between the suction service valve and the motor, filters out foreign and abrasive particles. Aninternal relief valve relieves discharge pressure to the suction side for safety protection at highcompression ratios as required by ANSI/ASHRAE 15 Safety Code.

Main bearings are solid cast bronze insert type with oversized bearing areas that result in ultra-lowbearing loading.

The crankshaft is die-forged, high strength iron alloy with integral counterweights, statically anddynamically balanced for smooth operation.

Connecting rods are lightweight aluminum with integral bearing surfaces on the crankshaft and pistonends. Pistons are close grain cast iron with oil and compression rings. Piston pins are full floatingtype for long life.

Compressors have a force-feed lubrication system with positive oil displacement, a reversible oilpump, and an operating oil charge. The pump feeds oil through rifle drilled passages in the crankshaftto all bearing surfaces. Magnetic plugs trap magnetic particles that enter the crankcase. The oilsupply filters through a large area oil strainer. A crankcase heater minimizes oil dilution by refrigerantat start.

Condenser CoilsCondenser coils have internally enhanced seamless copper tubes arranged in a staggered row pattern.The coils are mechanically expanded into McQuay lanced and rippled aluminum fins with full fincollars. An integral subcooler circuit provides subcooling to effectively eliminate the possibility ofliquid line flashing. The exterior condenser coils are fitted with a vinyl-coated wire mesh protectiveguard.

Condenser Fans and MotorsMultiple direct drive dynamically balanced propeller fans operate in formed venturi openings at low tipspeeds for maximum efficiency and minimum noise and vibration. A heavy-gauge vinyl-coated fanguard protects each fan.

Each condenser fan motor is heavy-duty, 3-phase with permanently lubricated ball bearings andinherent overload protection. SpeedTrol option includes a single-phase motor with fan speed controlon the lead fan per circuit. Fan motors on the AGR 070-100A are totally enclosed constructionproviding optimum environmental protection.


EvaporatorThe evaporator is direct expansion, shell-and-tube type with water flowing in the baffled shell side andrefrigerant flowing through the tubes. Two independent refrigerant circuits within the evaporatorserve the units dual refrigerant circuits.

The evaporator has a carbon steel shell and seamless high efficiency copper tubes roller expandedinto a carbon steel tube sheet. Water baffles are polypropylene to resist corrosion.

Refrigerant heads are carbon steel with multi-pass baffles to ensure oil return and are removable topermit access to the tubes from either end. For water removal, 3/8" (10mm) vent and drain plugs areprovided on the top and bottom of the shell.

The evaporator is wrapped with an electric resistance heater cable and insulated with 3/4" (19mm)thick vinyl nitrate polymer sheet insulation, protecting against water freeze-up at ambient airtemperatures to -20°F (-29°C). An ambient air thermostat controls the heater cable.

The fitted and glued in place insulation has a K factor of 0.28 at 75°F (23°C).

The refrigerant (tube) side maximum working pressure is 225 psig (1552 kPa). The water side workingpressure is 175 psig (1207 kPa). Each evaporator is designed, constructed, inspected, and stampedaccording to the requirements of the ASME Boiler and Pressure Vessel Code. Double thicknessinsulation is available as an option.

On Model AGR ---AM units the evaporator is shipped separate for field mounting and piping to theoutdoor unit. The refrigerant piping and specialties shown in Figure 1 (dotted lines) are furnished andinstalled by the installing contractor.

NOTE: The remote evaporator option is available on R-22 application only.

Figure 1, AGR ---AM, Remote Evaporator Piping (One of two circuits shown)

NOTE: A water flow switch or both water flow switch and water pump starter interlock, must be fieldinstalled to protect against evaporator freeze-up under low water flow conditions.


Electrical Control CenterOperating and safety controls and motor starting components are separately housed in a centrallylocated, weatherproof control panel with hinged and key locked doors. In addition to one of the threetypes of control described in the next sections, the following components are housed in the panel:

• Power terminal block

• Control, input, and output terminal block

• 120V control circuit transformer

• Optional disconnect switch with through-the-door operating handle

• Compressor contactors (circuit breakers are available as an option) (part winding on 208/230V,across-the-line on 380/460/575V) compressor motor inherent thermal and overload protection isstandard

• Optional phase voltage monitor with under/over/phase reversal protection

• Fan contactors with separate fuse blocks

• Optional ground fault protection

• The standard FanTrol system controls fan staging for control of refrigerant discharge pressure.The FanTrol system cycles condenser fans based on discharge pressure and outdoor temperatureand is suited for operation to 40°F (4.4°C).

• The optional SpeedTrol control uses both fan cycling and fan speed control on the lead fan percircuit and allows operation to 0°F (-18°C) outdoor temperature.

• Mechanical high pressure cutout

Global UNT Controller (Standard on R-22)Microprocessor based control that accomplishes unit capacity control by 6-stage cross-circuitcompressor cycling and unloading based on leaving chilled water temperature. Setpoint and controlband are easily field adjusted. Anti-cycling and stage delay timers are included. Safety controlsinclude low refrigerant pressure, low evaporator flow (field installed flow switch), low oil pressure, andsensor failures. Outside air temperature sensor is standard. Reset options are; outside air, returnwater, remote reset, demand limit, zone temperature reset. The optional Zone Terminal control isrequired to adjust the reset setpoints. The UNT control is used only with R-22.

Thirty feet of sensor cable is included, rolled up in the control panel, on remote evaporator models.

Figure 2, Standard Global UNT Controller


Global UNT with Zone Terminal (optional)Can be mounted in the chiller control panel or remotely located providing monitoring and adjusting ofcertain functions.

• Monitoring

• Monitor up to three setting or sensed values

• Monitor 18 different on/off inputs

• Monitor alarm status via a flashing alarm light and flashing symbol

• Adjusting allows adjustment of any flashing set points, three at a time, typically set up so that therelationship between values can be viewed simultaneously. For example

• Display 1 = Lvg Water temp

• Display 2 = Lvg Water SP

• Display 3 = % Unit Load

Figure 3, Zone Terminal Configuration

MONITORADJUSTTIME SCHEDULEPASSWORD

ENTER

Compressor 1Compressor 2Stage 3Stage 4

Solenoid #1

Frzstat#1AlmFrzstat#2AlmMinLowPres#1MinLowPres#2

OccupiedFlow FailureOA LockoutCir#2Lead=OnPmp/Stp #1=0

Lvg Water TempEvap Pres #1Evap Pres #2OA/AI3 Input

LvgWtr RBnd SPContrl Band SPActual Lvg SP

Unoccpd Lvg SPOA Lockout SP

Lvg Low Lim SPSoftSta Capcty

Cir #1 StartsCir #2 Starts

McQuay AGZ/AGR Global ChillerINSERT 10

ON OFF

Display Button 1

ModeSelector Panel

Mode SelectorButton

2

AGZ-AGR

Display Indicator Dot On/Off Status

3

Operating Mode Indicator

Up/Down Arrow Keys

Door

Display Item List Warning Signal

ALARM

OA/AI3 HiLimSPOA/AI3 ResetSP

Display Area 11

Display Area 21

Display Area 31

Alarm Light

Lvg Water SP

% Unit Load

SoftStart Time

Pmp/Stp #2=0

Solenoid #2

Stage 5 Opt.Stage 6 Opt.


MicroTech Control (optional on R-22, standard on R-134a)Exclusive microprocessor control common throughout McQuay equipment. The interface is a 12 keykeypad and 4-line, 40 character backlit liquid crystal display. The MicroTech continuously performsself-diagnostic checks on all system temperatures, pressures, and safeties, and will automatically shutdown a circuit or the entire unit at fault conditions. The cause, time, and date of the occurrence isrecorded and can be displayed. The seven previous incidents are kept in memory for servicereference.

If a fault occurs, the controller takes preventive measures in an effort to keep the unit operating;staging down capacity, activating a pre-alarm signal, and automatically switching to the alarm menu onthe display. Pre-alarms are self-clearing when the fault condition is no longer present.

Critical shutdown alarms such as high condenser pressure (with mechanical back up), freezeprotection, oil pressure (with mechanical back up), and low evaporator pressure are manual reset andmust be cleared at the keypad to resume operation.

Choose the MicroTech control and Open Protocol options to interface with virtually any buildingmanagement system and perform remote monitoring and control by hard wiring or modem. A nominalsite license fee is required for BAS interface.

A single chiller can connect directly to the BAS. Two or more units will require an Open ProtocolPanel (OPM) for connection.

Thirty feet of sensor cable is included, rolled up in the control panel, on remote evaporator models.

NOTE: The MicroTech control is required on R-134a applications.

Figure 4, Optional MicroTech Control Panel


Selection Procedure

Packaged Chiller, Model AS, R-22Selection with Inch-Pound (I-P) unitsTable 9 covers the range of leaving evaporator water temperatures and outside ambient temperaturesincluded under ARI 550/590. The tables are based on a 10°F temperature drop through the evaporator.Adjustment factors for applications having other than a 10°F drop can be found in Table 3. Theminimum leaving chilled water temperature setpoint without glycol is 40°F. For glycol selections, seeTable 1 for ethylene or Table 2 for propylene glycol adjustment factors. Ratings are based on a 0.0001fouling factor in the evaporator at sea level operation. For other fouling factors, different delta-Ts, oraltitude correction factors, see Table 3. For applications outside the catalog ratings contact your localMcQuay sales representative.

Selection exampleGiven: 67 tons minimum 95°F ambient temperature

160 gpm, 55°F to 44°F chilled water 0.0001 fouling factor

1. From Performance Table 9, an AGR 070AS at the given conditions will produce 67.5 tons with acompressor kW input of 79.7 and a unit EER of 9.3.

2. If any elements are unknown, use the following equation to calculate them:

24

=GPM Tdelta

tons

−×

3 Determine the evaporator pressure drop. Using Figure 8, enter at 160 and follow up to the AGR070AS line intersect. Read horizontally to obtain an evaporator pressure drop of 16.0 feet ofwater.

Selection example using ethylene glycolGiven:

64 tons minimum95°F ambient temperature54°F to 44°F chilled fluid0.0001 fouling factorProtect from freezing down to 0°F

1. From Table 1, select an ethylene glycol concentration of 40% to protect against freezing at 0°F.

2. At 40% ethylene glycol, the adjustment factors are: Capacity =0.961, kW = 0.976,

flow = 1.121, pressure drop = 1.263

3. Select the AGR 070AS and correct with 40% ethylene glycol factors.

4. Correct capacity = 0.961 X 67.5 tons = 64.9 tons

5. Correct compressor kW = 0.976 X 79.7 = 77.8 kW

6. Calculate chilled water flow:

155.8 = 10

249.64 = capacity) corrected(at flowWater

F

tons

°

×GPM

Glycol flow (at 40% solution) = 1.121 X 155.8 = 174.7 GPM

Determine the evaporator pressure drop. Using Figure 8, enter at 155.7 (flow rate for water) and followup to the AGR 070AS line intersect. Read horizontally to obtain an evaporator pressure drop of 15.5feet. The pressure drop for 40% glycol solution = 1.263 X 15.5 feet = 19.6 feet of water.


Selection Procedure 60 Hertz, SI UnitsTable 10, covers a range of leaving evaporator water temperatures and outside ambient temperatures.The tables are based on a 5°C temperature drop through the evaporator. The minimum leaving chilledwater temperature setpoint without glycol is 4.5°C. For brine selections, see Table 1 for ethylene orTable 2 for propylene glycol adjustment factors. Ratings are based on a 0.0176 fouling factor in theevaporator at sea level operation. For other fouling factors, different Delta-Ts, or altitude correctionfactors, see Table 3. For applications outside the catalog ratings contact your local McQuay salesrepresentative.

Selection ExampleGiven:

235 kW minimum35°C ambient air temperature11 L/s, 12°C - 7°C chilled water temperature0.0176 evaporator fouling factor

1. From Table 10, an AGR 070AS at the given conditions will produce 241.5 kW with a compressorkW input of 80.4 and a COP of 2.8.

2. Determine the evaporator pressure drop. Using Figure 8, enter at 11 L/s and follow to the AGR070AS line intersect. Read horizontally to obtain an evaporator pressure drop of 55.5 kPa ofwater.

Selection example using ethylene glycolGiven:

225 kW minimum35°C ambient air temperature11 L/s, 12°C - 7°C chilled water temperature0.0176 evaporator fouling factorProtect against freezing down to -18°C

1. From Table 1, select an ethylene glycol concentration of 40% to protect against freezingat -18°C

2. At 40% ethylene glycol, the adjustment factors are: Capacity = 0.961, kW = 0.976,GPM = 1.121, pressure drop = 1.263

3. Select the AGR 070AS and correct with 40% ethylene glycol factors.

4. Correct capacity = 0.961 X 241.5 kW = 232.1 kW

5. Correct compressor kW = 0.976 X 80.4 kW = 78.5 kW

6. Calculate flow:

Glycol flow (at 40% solution) = 1.121 X 11.0 L/s = 12.3 L/s

7. Determine the evaporator pressure drop. Using Figure 8, enter at 11.0 L/s (flow rate for water) andfollow to theAGR 070AS line intersect. Read horizontally to obtain an evaporator pressure drop of 55.5 kPa ofwater.

The pressure drop for 40% solution = 1.263 X 55.5 kPa = 70.1 kPa


Packaged Chiller, Model AS, R-134aAGR performance with R-134a refrigerant is calculated from the R-22 ratings as follows:

1) Calculate the unit R-134a capacity; multiply the R-22 capacity by 0.68.

2) Calculate the unit R-134a power input;

a) Calculate the unit R-22 power (kW shown in tables is compressor only);

EERUnit

TonsRkWUnitR

12000*2222

−=

b) Calculate the unit fan and control power (unaffected by refrigerant);TablefromPowerCompressorRkWUnitRPower 2222 −=

c) Calculate the R-134a compressor power; multiply the R-22 compressor kW by 0.615

d) Calculate the unit R-134a power; fan & control power from b)+R-134a compressor power c)

3) Calculate R-134a EER: WattsUnitaR

MBHcapacityaREERaR

134

134134 =

Remote Evaporator, Model AM

Selection with Inch-Pound (I-P) units

Since the AGR-AM units always include a specific remote shell-and-tube evaporator,the ratings are based on leaving chilled water temperature and ambient airtemperature from the Rating Tables corrected for line loss as follows.Table 9 (Inch-Pound units) and Table 10 (SI units) cover the normal range of leaving evaporator watertemperatures and outside ambient air temperatures. The tables are based on a 10°F (5°C) temperaturedrop through the evaporator. Adjustment factors for applications having other than a 10°F (5°C) dropcan be found in Table 3. The minimum leaving chilled water temperature setpoint without glycol is40°F (4.4°C). For brine selections, see Table 1 for ethylene Table 2 for propylene glycol adjustmentfactors. Ratings are based on a 0.0001 (0.0176) fouling factor in the evaporator at sea level operation.For other fouling factors, derates for different delta-Ts, or altitude correction factors, see Table 3. Forapplications outside the catalog ratings contact your local McQuay sales representative.

The length and configuration of the interconnecting refrigerant piping will affect the system capacity.Derates based on equivalent length of pipe are given in Table 8. Refer to Application Data, RefrigerantPiping section for guidelines.

The steps for selecting an AGR-AM are as follows:1. Add 3% to the required cooling capacity (to approximate correction factors) and make a

preliminary unit selection from performance Table 9 or Table 10.

2. Divide the required capacity by the appropriate capacity correction factors: glycols from Table 1or Table 2; altitude, chilled water Delta T, or fouling factor Table 3; and refrigerant piping deratefrom Table 8 as explained in step 3 below.

3. Determine the suction line size by summing the equivalent feet (from Table 4) of all the fittings(use a sketch of the piping layout) and adding the sum of these fitting losses to the actual linearfeet of tubing. This will then equal the total equivalent feet. (To use the equivalent feet, startwith the unit suction connection size from Table 6 as the first try). Knowing the equivalent feetand the unit size, check the line selection in Table 6 or Table 7 and correct if required.

4. If the unit rated capacity in the tables is less than the corrected required capacity, redo theselection with the next larger unit. In most cases the line size will be the unit connection size. Ifthe selection is satisfactory, correct the power (if applicable) and determine water pressure drop.


Selection exampleGiven:

64 tons required capacity95°F ambient temperatureCool 154 gpm from 54°F to 44°F 0.0001evaporator fouling factor2,000 foot altitude

Add 3% to the required capacity for approximate derate: 64 x 1.03 = 66 tons. From PerformanceTable 9, an AGR-070AM at the given conditions will produce 67.5 tons with a compressor kWinput of 79.7 and a unit EER of 9.3.

1. Determine derate factors :

Altitude correction from Table 3: 0.986 Capacity, 1.009 Power

2. Piping correction:

Assume 2 1/8" suction line based on connection size in Table 6

(3) 90° Standard ells (Table 4) 3 x 5 ft =15 ft

Plus actual linear feet 70 ft

Total Equivalent Feet 85 ft

Check Table 7 for size and find that 2 1/8” is acceptable size for oil carry. If the selected riser sizeis too large, double risers would be required. See Refrigerant Piping section for importantinformation, including double riser layouts.

The capacity correction factor from is 0.964.

3. The corrected capacity of the AGR is: 67.5 tons x 0.986{altitude} x 0.964{piping} = 64.1 tons Thissatisfies the 64 ton requirement.

4. Correct the compressor power required: 79.7 kW x 1.009{altitude} = 80.4 kW.

5. Calculate the unit power input from corrected EER:

W = BTU / EER W =64.1 tons x 12,000 / (9.3EER / 1.009) = 83.5 kW

6. Determine the evaporator pressure drop. Enter the pressure drop curves (Figure 8) at 154 gpmand read up to AGR 070AM, read over to pressure drop of 9.8 ft.

Selection example using ethylene glycolGiven: 64 tons minimum

95°F ambient temperature54°F to 44°F chilled fluid0.0001 fouling factorProtect from freezing down to 0°F

1. From Table 1, select an ethylene glycol concentration of 40% to protect against freezing at 0°F.

2. At 40% ethylene glycol, the adjustment factors are: Capacity =0.961, kW = 0.976,

Flow = 1.121, pressure drop = 1.263

3. Select the AGR 070AM and correct with 40% ethylene glycol factors and piping correction factor.

4. Correct capacity = 0.961 X 67.5 tons = 64.6 tons

5. Correct compressor kW = 0.976 X 79.7 = 77.8 kW

Figure 5, Sample Piping LayoutAGR-AM

Remote Evaporator

10 ft.

30 ft.

20 ft.

10 ft.

LiquidLine

SuctionLine


6. Calculate chilled water flow:

Water flow (at corrected capacity) = = 155.3 GPM64.7 24

10

tons

F

×

°

Glycol flow (at 40% solution) = 1.121 X 155.3 GPM = 174.1 GPM

Determine the evaporator pressure drop. Using Figure 8, enter at 155.3 GPM and follow up to the AGR070AM line intersect. Read horizontally to obtain an evaporator pressure drop of 10.5 feet. Thepressure drop for 40% solution = 1.263 X 10.5 feet = 13.3 feet.

Selection Procedure 60 Hz Metric UnitsThe selection procedure for Metric units is exactly the same as English except that Metric tables andmetric units are used.

Application Adjustment Factors

Ethylene and Propylene Glycol FactorsAGR units can operate with a leaving chilled fluid temperature range of 20°F (-6.7°C) to 60°F (15.6°C).A glycol solution is required when leaving chilled fluid temperature is below 40°F (4.4°C). The use ofglycol will reduce the performance of the unit depending on concentration.

Altitude Correction FactorsPerformance tables are based at sea level. Elevations other than sea level affect the performance of theunit. The decreased air density will reduce condenser capacity and reduce the unit's performance. Forperformance at elevations other than sea level refer to Table 3. Maximum allowable altitude is 6,000feet (1830 meters).

Evaporator Temperature Drop FactorsPerformance tables are based on a 10°F (5.5°C) temperature drop through the evaporator. Adjustmentfactors for applications with temperature ranges from 6°F to 16°F (3.3°C to 8.9°C) are in Table 3.Temperature drops outside this 6 to 16 degrees F (3.3 to 8.9 degrees C) range may affect the controlsystem's capability to maintain acceptable control and are not recommended.

The maximum water temperature that can be circulated through the evaporator in a non-operatingmode is 100°F (37.8°C). Maximum entering temperature during operation is 90°F (32.2°C).

Table 1, Ethylene GlycolFreeze Point%

E.G. °F °CCapacity Power Flow PD

10 23.0 -5 0.991 0.996 1.013 1.07020 14.0 -10 0.982 0.992 1.040 1.12930 1.4 -17 0.972 0.986 1.074 1.18140 -13.0 -25 0.961 0.976 1.121 1.26350 -34.6 -37 0.946 0.966 1.178 1.308

Table 2, Propylene glycolFreeze Point%

P.G. °F °CCapacity Power Flow PD

10 26 -3 0.987 0.992 1.010 1.06820 19 -7 0.975 0.985 1.028 1.14730 9 -13 0.962 0.978 1.050 1.24840 -5 -21 0.946 0.971 1.078 1.36650 -27 -33 0.929 0.965 1.116 1.481

NOTE: Ethylene and propylene glycol ratings are outside the scope of


Standard 550/590-98 certification program

Fouling factorPerformance tables are based on water with a fouling factor of

)/0176.0(,,/0001.022

kWCmorBTUFxhrxft °×° per ARI 550/590-98. As fouling increases,

performance decreases. For performance at other than 0.0001 (0.0176) fouling factor see Table 3.

Foreign matter in the chilled water system will adversely affect the heat transfer capability of theevaporator, and could increase the pressure drop and reduce the water flow. To ensure optimum unitoperation, maintain proper water treatment.

Table 3, Capacity and Power DeratesFouling FactorChilled Water

Delta-T 0.0001 (0.0176) 0.00025 (0.044) 0.00075 (0.132) 0.00175 (0.308)ALTITUDE

°F °C Cap. Power Cap. Power Cap. Power Cap. Power

6 3.3 0.992 0.995 0.985 0.993 0.962 0.986 0.919 0.972

8 4.4 0.995 0.997 0.988 0.995 0.965 0.988 0.922 0.974

SEA 10 5.6 1.000 1.000 0.993 0.998 0.970 0.991 0.927 0.977

LEVEL 12 6.7 1.005 1.002 0.998 1.000 0.975 0.993 0.932 0.979

14 6.8 1.010 1.005 1.003 1.003 0.980 0.996 0.936 0.982

16 8.9 1.014 1.007 1.007 1.005 0.984 0.998 0.940 0.984

6 3.3 0.978 1.005 0.971 1.003 0.949 0.996 0.906 0.982

8 4.4 0.982 1.007 0.975 1.005 0.953 0.998 0.910 0.984

2000 feet 10 5.6 0.986 1.009 0.979 1.007 0.956 1.000 0.914 0.986

(610 m) 12 6.7 0.992 1.011 0.985 1.009 0.962 1.002 0.919 0.988

14 6.8 0.997 1.014 0.990 1.012 0.967 1.005 0.924 0.991

16 8.9 1.000 1.016 0.993 1.014 0.970 1.007 0.927 0.993

6 3.3 0.966 1.016 0.959 1.014 0.937 1.007 0.895 0.993

8 4.4 0.969 1.018 0.962 1.016 0.940 1.009 0.898 0.995

4000 feet 10 5.6 0.973 1.021 0.966 1.019 0.944 1.012 0.902 0.998

(1220 m) 12 6.7 0.978 1.025 0.971 1.023 0.949 1.016 0.906 1.002

14 6.8 0.982 1.027 0.975 1.025 0.953 1.018 0.910 1.004

16 8.9 0.986 1.028 0.979 1.026 0.956 1.019 0.914 1.005

6 3.3 0.953 1.025 0.946 1.023 0.924 1.016 0.883 1.002

8 4.4 0.955 1.028 0.948 1.026 0.926 1.019 0.885 1.005

6000 feet 10 5.6 0.959 1.031 0.952 1.029 0.930 1.022 0.889 1.008

(1830 m) 12 6.7 0.963 1.034 0.956 1.032 0.934 1.024 0.893 1.011

14 6.8 0.968 1.036 0.961 1.034 0.939 1.026 0.897 1.013

16 8.9 0.972 1.037 0.965 1.035 0.943 1.027 0.901 1.014

Table 4, Equivalent Feet for FittingsFitting Type 7/8 1 1/8 1 3/8 1 5/8 2 1/8 2 5/8 3 1/8

Elbows 90° Standard 2.0 2.6 3.3 4.0 5.0 6.0 7.5 90° Long Radius 1.4 1.7 2.3 2.6 3.3 4.1 5.0 90° Street 3.2 4.1 5.6 6.3 8.2 10 12 45° Standard 0.9 1.3 1.7 2.1 2.6 3.2 4.0 45° Street 1.5 2.1 3.0 3.4 4.5 5.2 6.4 180° Bend 3.2 4.1 5.6 6.3 8.2 10 12Tees Full Size 1.4 1.7 2.3 2.6 3.3 4.1 5.0 Reducing 2.0 2.6 3.3 4.0 5.0 6.0 7.5Valves Globe Valve, Open 22 29 38 43 55 69 84 Gate Valve, Open 0.9 1.0 1.5 1.8 2.3 2.8 3.2 Angle Valve, Open 9.0 12 15 18 24 29 35


Table 5, Recommended Liquid Line Sizes Per Refrigerant CircuitRecommended Liquid Line Size Per Circuit

AGR-AMUnit Model

LiquidConnectionSize at Unit

Up To 50Equiv. Feet

Up To 75 Equiv. Feet

Up To 100Equiv. Feet



070AM 1 1/8" 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 "075AM 1 1/8" 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 "

080AM 1 1/8" 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 " 1 3/8"085AM 1 1/8" 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 " 1 3/8"090AM 1 1/8" 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 " 1 3/8"095AM 1 1/8" 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 " 1 3/8"100AM 1 1/8" 1 1/8 " 1 1/8 " 1 1/8 " 1 1/8 " 1 3/8"

Table 6. Recommended Horizontal and Downflow Suction Line SizeRecommended Suction Line Size

AGR-AMUnit Model

SuctionConnectionSize at Unit

Up To 50Equiv. Feet

Up To 75 Equiv. Feet




070AM 2 1/8" 2 1/8" 2 5/8" 2 5/8" 2 5/8" 2 5/8"075AM 2 1/8" 2 1/8" 2 5/8" 2 5/8" 2 5/8" 2 5/8"080AM 2 1/8", 2 5/8" 2 1/8", 2 5/8" 2 5/8" 2 5/8" 2 5/8" 2 5/8"

085AM 2 5/8" 2 5/8" 2 5/8" 2 5/8" 2 5/8" 3 1/8"090AM 2 5/8" 2 5/8" 2 5/8" 2 5/8" 3 1/8" 3 1/8"095AM 2 5/8" 2 5/8" 2 5/8" 2 5/8" 3 1/8" 3 1/8"100AM 2 5/8" 2 5/8" 2 5/8" 3 1/8" 3 1/8" 3 1/8"

Table 7, Minimum Suction Riser SizeMinimum Suction Riser for Oil Carry by Unit SystemAGR

Model 070AM 075AM 080AM 085AMSystem 1 2 1 2 1 2 1 2

Line Size 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 5/8 2 5/8 2 5/8

AGRModel

090AM 095AM 100AM

System 1 2 1 2 1 2Line Size 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8

Table 8, Refrigerant Piping DeratesCapacity Loss Due to Refrigerant PipingAGR-AM

Unit Model At Unit 50 Equiv. ft. 75 Equiv. ft. 100 Equiv. ft. 125 Equiv. ft. 150 Equiv. ft.

070AM 1.0 0.969 0.984 0.978 0.973 0.967075AM 1.0 0.969 0.984 0.978 0.973 0.967080AM 1.0 0.961 0.978 0.971 0.963 0.957085AM 1.0 0.982 0.974 0.966 0.957 0.978090AM 1.0 0.979 0.968 0.957 0.978 0.974095AM 1.0 0.979 0.968 0.957 0.978 0.974100AM 1.0 0.976 0.964 0.980 0.975 0.971


Performance Data

Table 9, AGR 070 – AGR 100, 60 Hz, R-22, I-P Units

See Selection Procedure section for derates for the "AM" remote evaporator unitsAMBIENT AIR TEMPERATURE

75°F 85°F 95°F 105°F 115°FAGRSIZE

LWT(°F) Capac.

TonsPWRkWi EER

Capac.Tons

PWRkWi EER

Capac.Tons

PWRkWi EER

Capac.Tons

PWRkWi EER

Capac.Tons

PWRkWi EER

40.0 71.1 66.9 11.7 67.1 71.7 10.4 63.1 76.5 9.0 59.3 82.9 8.0 55.5 88.9 7.042.0 73.5 67.7 12.0 69.4 72.8 10.6 65.3 77.9 9.2 61.4 84.2 8.2 57.5 90.4 7.2

070AS 44.0 75.9 68.4 12.2 71.7 73.9 10.8 67.5 79.7 9.3 63.5 85.7 8.3 59.5 91.8 7.3070AM 46.0 78.6 69.7 12.4 67.8 74.8 11.0 70.0 81.0 9.6 65.8 87.1 8.5 61.6 93.4 7.4

48.0 81.3 70.9 12.7 76.9 75.9 11.2 72.5 82.3 9.8 68.1 88.5 8.7 63.7 95.1 7.650.0 84.0 71.9 12.9 79.4 77.5 11.4 74.9 83.4 9.9 70.4 90.1 8.8 65.8 96.8 7.740.0 73.0 66.7 11.7 69.3 73.4 10.4 65.5 76.4 9.1 61.6 81.9 8.1 57.7 87.3 7.142.0 75.5 68.2 11.9 71.7 74.6 10.6 67.8 77.6 9.3 63.7 83.4 8.2 59.5 89.1 7.2

075AS 44.0 78.0 69.0 12.1 74.1 75.7 10.8 70.1 78.9 9.4 65.9 84.8 8.4 61.8 90.7 7.3075AM 46.0 80.7 70.1 12.4 76.6 77.7 11.0 72.5 81.0 9.6 68.3 86.2 8.6 64.0 92.4 7.5

48.0 83.3 71.0 12.7 79.1 79.6 11.2 74.9 83.5 9.8 70.6 87.7 8.7 66.3 94.1 8.050.0 85.9 72.1 12.9 81.6 80.7 11.5 77.3 85.7 10.0 72.9 89.2 8.9 68.6 95.8 7.840.0 81.2 72.8 11.9 77.0 80.1 10.6 72.8 83.3 9.3 68.5 89.4 8.3 64.1 95.3 7.242.0 83.9 74.5 12.2 79.7 81.4 10.8 75.4 84.7 9.5 70.7 91.0 8.4 66.1 97.2 7.3

080AS 44.0 86.7 75.3 12.4 82.3 82.7 11.0 77.9 86.1 9.6 73.3 92.6 8.5 68.6 99.0 7.5080AM 46.0 89.7 76.5 12.7 85.1 84.8 11.2 80.5 88.3 9.8 75.9 94.1 8.7 71.2 100.8 7.7

48.0 92.5 77.4 12.9 87.9 86.9 11.5 83.2 91.1 10.0 78.5 95.7 8.9 73.7 102.7 8.250.0 95.5 78.7 13.2 90.7 88.0 11.7 85.8 93.5 10.2 81.1 97.3 9.1 76.3 104.5 8.040.0 88.3 79.3 12.0 83.7 87.3 10.7 79.2 90.9 9.4 74.5 97.5 8.3 69.7 103.9 7.342.0 91.3 81.2 12.3 86.6 88.7 10.9 81.9 92.4 9.5 76.9 99.3 8.5 71.9 106.0 7.4

085AS 44.0 94.3 82.2 12.5 89.5 90.1 11.1 84.7 93.9 9.7 79.7 100.9 8.6 74.6 108.0 7.6085AM 46.0 97.5 83.4 12.8 92.5 92.5 11.4 87.6 96.3 9.9 82.5 102.6 8.8 77.4 110.0 7.7

48.0 100.6 84.5 13.1 95.5 94.7 11.6 90.5 99.3 10.1 85.3 104.3 9.0 80.2 112.0 8.350.0 103.8 85.8 13.3 98.6 96.0 11.8 93.3 102.0 10.3 88.1 106.1 9.2 82.9 114.0 8.140.0 90.3 80.2 12.2 85.7 88.3 10.8 81.1 91.9 9.5 76.2 98.5 8.4 71.4 105.1 7.442.0 93.4 82.1 12.4 88.7 89.7 11.0 83.9 93.4 9.6 78.7 100.3 8.6 73.6 107.1 7.5

090AS 44.0 96.5 83.0 12.7 91.6 91.1 11.2 86.7 94.9 9.8 81.5 102.0 8.7 76.4 109.1 7.7090AM 46.0 99.8 84.3 12.9 94.7 93.5 11.5 89.6 97.4 10.0 84.4 103.7 8.9 79.2 111.1 7.8

48.0 103.0 85.4 13.2 97.8 95.8 11.7 92.6 100.4 10.2 87.3 105.4 9.1 82.0 113.2 8.450.0 106.3 86.7 13.5 100.9 97.0 11.9 95.5 103.1 10.4 90.2 107.2 9.3 84.9 115.2 8.240.0 97.9 91.2 11.8 92.9 100.3 10.5 87.9 104.4 9.2 82.6 112.0 8.2 77.4 119.4 7.142.0 101.3 93.3 12.0 96.1 102.0 10.7 90.9 106.2 9.4 85.4 114.1 8.3 79.8 121.8 7.3

095AS 44.0 104.6 94.4 12.3 99.3 103.6 10.9 94.0 107.9 9.5 88.4 116.0 8.5 82.8 124.1 7.4095AM 46.0 108.2 95.8 12.5 102.7 106.3 11.1 97.2 110.7 9.7 91.5 117.9 8.6 85.9 126.4 7.6

48.0 111.7 97.1 12.8 106.0 108.9 11.3 100.4 114.2 9.9 94.7 119.9 8.8 89.0 128.7 8.150.0 115.2 98.6 13.1 109.4 110.3 11.6 103.6 117.2 10.1 97.8 121.9 9.0 92.0 131.0 7.940.0 104.2 99.5 11.5 98.9 109.6 10.3 93.5 114.0 9.0 87.9 122.3 8.0 82.3 130.4 7.042.0 107.8 101.9 11.8 102.3 111.3 10.4 96.8 115.9 9.2 90.8 124.5 8.1 84.9 133.0 7.1

100AS 44.0 111.3 103.1 12.0 105.7 113.1 10.7 100.0 117.8 9.3 94.1 126.6 8.3 88.1 135.5 7.3100AM 46.0 115.1 104.6 12.3 109.3 116.0 10.9 103.4 120.9 9.5 97.4 128.8 8.5 91.4 137.9 7.4

48.0 118.8 106.0 12.5 112.8 118.9 11.1 106.8 124.6 9.7 100.7 130.9 8.6 94.6 140.5 8.050.0 122.6 107.7 12.8 116.4 120.5 11.3 110.2 127.9 9.9 104.1 133.1 8.8 97.9 143.0 7.7

Notes:1. Boxed ratings certified in accordance with ARI Standard 550/590-98 for "AS" units only. Remote evaporator units (AM) are outside the ARI scope.2. Ratings based on HCFC-22, evaporator fouling factor of 0.0001, 2.4 gpm/ton, and at sea level.3. kWi input is for compressors only, EER is for the entire unit, including compressors, fan motors and control power.4. For 208V units, multiply capacity and EER by 0.985. For units with SpeedTrol option, multiply capacity and EER by 0.98


Table 10, AGR 070 – AGR 100, 60 Hz, R-22, SI Units

See Selection Procedure section for derates for the "AM" remote evaporator unitsAMBIENT AIR TEMPERATURE

25°C (77°F) 30°C (86°F) 35°C (95°F) 40°C (104°F) 45°C (113°F)AGRSIZE

LWT(°C) Capac.

kWPWRkWi COP

Capac.kW

PWRkWi COP

Capac.kW

PWRkWi COP

Capac.kW

PWRkWi COP

Capac.kW

PWRkWi COP

5.0 (41.0°F) 251.9 67.9 3.4 239.1 72.9 2.9 226.0 77.8 2.7 213.3 82.7 2.4 200.1 87.6 2.26.0 (42.8°F) 260.6 69.0 3.5 247.1 74.1 3.0 233.6 79.1 2.8 220.4 84.0 2.5 207.4 89.1 2.2

070AS 7.0 (44.6°F) 269.4 69.9 3.6 255.1 75.2 3.0 241.5 80.4 2.8 228.0 85.4 2.5 214.1 90.7 2.3070AM 8.0 (46.4°F) 273.8 70.3 3.6 259.3 75.7 3.1 245.4 81.0 2.9 231.5 86.1 2.5 217.6 91.4 2.3

9.0 (48.2°F) 282.5 71.3 3.7 267.7 76.8 3.1 253.5 82.2 2.9 239.1 87.7 2.6 224.8 93.0 2.310.0 (50.0°F) 291.7 72.4 3.8 276.6 77.9 3.2 261.4 83.5 3.0 246.7 89.1 2.6 232.0 94.6 2.35.0 (41.0°F) 256.1 68.5 3.3 244.1 72.9 2.9 234.5 77.1 2.7 221.4 81.2 2.4 210.4 85.3 2.26.0 (42.8°F) 264.7 69.6 3.3 252.4 74.1 3.0 240.5 78.5 2.7 228.9 82.7 2.4 218.0 86.9 2.2

075AS 7.0 (44.6°F) 273.2 70.8 3.4 260.8 75.4 3.0 248.5 80.0 2.7 236.8 84.3 2.5 225.6 88.6 2.3075AM 8.0 (46.4°F) 277.6 71.3 3.4 264.9 76.1 3.1 252.7 80.6 2.8 240.7 85.1 2.5 229.2 89.5 2.3

9.0 (48.2°F) 286.4 72.5 3.5 273.5 77.4 3.1 261.0 82.1 2.8 248.6 86.7 2.5 236.8 91.2 2.310.0 (50.0°F) 295.1 73.6 3.5 281.9 78.7 3.2 269.0 83.6 3.0 256.1 88.3 2.6 244.6 93.0 2.45.0 (41.0°F) 284.2 74.9 3.3 270.8 79.7 2.9 260.2 84.3 2.7 245.6 88.8 2.4 233.5 93.2 2.26.0 (42.8°F) 293.7 76.1 3.3 280.1 81.1 3.0 266.8 85.8 2.7 254.0 90.5 2.4 241.9 95.0 2.2

080AS 7.0 (44.6°F) 303.2 77.4 3.4 289.3 82.4 3.0 275.8 87.4 2.7 262.8 92.1 2.5 250.3 96.9 2.3080AM 8.0 (46.4°F) 308.0 78.0 3.4 293.9 83.2 3.1 280.4 88.2 2.8 267.1 93.1 2.5 254.4 97.8 2.3

9.0 (48.2°F) 317.8 79.2 3.5 303.4 84.6 3.1 289.6 89.8 2.8 275.8 94.8 2.5 262.8 99.7 2.310.0 (50.0°F) 327.5 80.5 3.5 312.8 86.0 3.2 298.5 91.4 3.0 284.2 96.6 2.6 271.4 101.7 2.45.0 (41.0°F) 309.1 81.4 3.4 294.6 86.7 3.0 283.0 91.7 2.8 267.2 96.6 2.5 253.9 101.4 2.26.0 (42.8°F) 319.4 82.8 3.4 304.6 88.2 3.1 290.2 93.4 2.8 276.3 98.4 2.5 263.0 103.3 2.3

085AS 7.0 (44.6°F) 329.8 84.2 3.5 314.7 89.7 3.1 299.9 95.1 2.9 285.8 100.2 2.5 272.2 105.4 2.4085AM 8.0 (46.4°F) 335.0 84.8 3.6 319.6 90.5 3.2 305.0 95.9 2.9 290.5 101.2 2.6 276.7 106.4 2.4

9.0 (48.2°F) 345.7 86.2 3.6 330.0 92.0 3.3 315.0 97.7 2.9 300.0 103.2 2.6 285.8 108.5 2.410.0 (50.0°F) 356.2 87.6 3.7 340.3 93.6 3.4 324.7 99.4 3.1 309.1 105.0 2.7 295.2 110.6 2.55.0 (41.0°F) 316.4 82.4 3.4 301.5 87.7 3.0 289.7 92.8 2.8 273.5 97.7 2.5 259.9 102.6 2.26.0 (42.8°F) 327.0 83.8 3.4 311.8 89.2 3.1 297.1 94.5 2.8 282.8 99.6 2.5 269.3 104.6 2.3

090AS 7.0 (44.6°F) 337.6 85.2 3.5 322.1 90.8 3.1 307.0 96.2 2.9 292.6 101.4 2.5 278.7 106.6 2.4090AM 8.0 (46.4°F) 342.9 85.8 3.6 327.2 91.6 3.2 312.2 97.1 2.9 297.4 102.5 2.6 283.2 107.7 2.4

9.0 (48.2°F) 353.9 87.2 3.6 337.8 93.2 3.3 322.4 98.8 2.9 307.1 104.4 2.6 292.6 109.8 2.410.0 (50.0°F) 364.6 88.6 3.7 348.3 94.7 3.4 332.3 100.6 3.1 316.4 106.3 2.7 302.2 111.9 2.55.0 (41.0°F) 342.5 93.4 3.3 326.4 99.4 2.9 313.6 105.2 2.7 296.0 110.8 2.4 281.4 116.4 2.26.0 (42.8°F) 354.0 95.0 3.3 337.6 101.1 3.0 321.6 107.1 2.7 306.2 112.9 2.4 291.5 118.6 2.2

095AS 7.0 (44.6°F) 365.4 96.6 3.4 348.7 102.9 3.0 332.4 109.1 2.7 316.7 115.0 2.5 301.7 120.9 2.3095AM 8.0 (46.4°F) 371.2 97.3 3.4 354.2 103.8 3.1 338.0 110.0 2.8 321.9 116.1 2.5 306.6 122.1 2.3

9.0 (48.2°F) 383.1 98.9 3.5 365.7 105.6 3.1 349.0 112.0 2.8 332.4 118.4 2.5 316.7 124.5 2.310.0 (50.0°F) 394.7 100.5 3.5 377.0 107.4 3.2 359.8 114.0 3.0 342.5 120.5 2.6 327.1 126.9 2.45.0 (41.0°F) 368.5 101.8 3.3 351.2 108.3 2.9 337.4 114.6 2.7 318.5 120.7 2.4 302.7 126.7 2.26.0 (42.8°F) 380.8 103.5 3.3 363.2 110.2 3.0 346.0 116.7 2.7 329.4 123.0 2.4 313.6 129.2 2.2

100AS 7.0 (44.6°F) 393.1 105.2 3.4 375.2 112.1 3.0 357.6 118.8 2.7 340.7 125.3 2.5 324.5 131.7 2.3100AM 8.0 (46.4°F) 399.4 106.0 3.4 381.1 113.1 3.1 363.6 119.9 2.8 346.3 126.5 2.5 329.8 133.0 2.3

9.0 (48.2°F) 412.1 107.7 3.5 393.4 115.0 3.1 375.5 122.0 2.8 357.6 128.9 2.5 340.7 135.6 2.310.0 (50.0°F) 424.7 109.4 3.5 405.7 116.9 3.2 387.1 124.2 3.0 368.5 131.3 2.6 351.9 138.2 2.4

NOTES:1. Ratings based on HCFC-22, evaporator fouling of 0.00176, 0.048 l/s per kW, and sea level altitude. Remote evaporator units (AM) are outside ARIscope.2. Interpolation is allowed; extrapolation is not permitted. Consult McQuay for performance outside the cataloged ratings.3. kWi input is for compressors only. EER is for the entire unit, including compressors, fan motors and control power.4. For LWT below 4.4°C and below please refer to Application Data.5. For 208V units, multiply capacity and EER by 0.986. For units with SpeedTrol option, multiply capacity and EER by 0.98


Part Load Data

Table 11, 60 Hz, R-22

Unit Size % Load CapacityTons

PowerUnit kW

EER IPLV

100.00 67.5 87.1 9.3

75.00 50.5 50.6 12.0

50.00 33.7 27.6 14.7070AS

25.00 16.8 12.2 16.5

13.7

100.00 70.1 89.9 9.4

75.00 52.6 54.7 11.5

50.00 35.0 34.7 12.1075AS

25.00 17.5 14.9 14.1

12.1

100.00 77.9 97.2 9.6

75.00 58.4 59.1 11.9

50.00 38.9 34.0 13.7080AS

25.00 19.4 16.1 14.5

13.0

100.00 84.7 104.9 9.7

75.00 63.5 63.5 12.0

50.00 42.3 35.2 14.4085AS

25.00 21.1 15.4 16.4

13.6

100.00 86.7 106.0 9.8

75.00 65.0 64.1 12.2

50.00 43.3 35.5 14.6090AS

25.00 21.6 15.6 16.6

13.8

100.00 94.0 118.9 9.5

75.00 70.4 72.2 11.7

50.00 46.9 39.5 14.2095AS

25.00 23.4 16.7 16.8

13.4

100.00 100.0 128.8 9.3

75.00 75.0 79.4 11.3

50.00 50.0 44.1 13.6100AS

25.00 25.0 19.4 15.5

12.8

Notes: Certified in accordance with ARI Standard 550/590-98.


Sound Data

Table 12, AGR 070AS/AM - 100AS/AM Sound PressureSound Pressure At 30 ft. From Sides Of Unit (dB)

Octave BandUnitModel

63 125 250 500 1000 2000 4000 8000

Sound PressureOverall

A-Weighted

AGR070A 65 65 64 64 62 56 54 54 66AGR075A 66 67 65 65 62 56 55 55 67AGR080A 66 68 65 65 62 56 56 55 67AGR085A 67 69 66 65 62 56 56 55 67AGR090A 67 69 66 65 62 56 56 55 67AGR095A 68 69 67 66 63 58 58 56 68AGR100A 69 70 68 66 63 58 58 56 68

Note: Data at 30 ft. (9m) from side of unit.

Table 13, AGR 070AS/AM – 100AS/AM Sound PowerSound PowerOctave BandUnit

Model63 125 250 500 1000 2000 4000 8000

Sound PowerOverall

A-Weighted

AGR070A 92 92 91 91 89 83 81 81 93AGR075A 93 94 92 92 89 83 82 82 94AGR080A 93 95 92 92 89 83 83 82 94AGR085A 94 96 93 92 89 83 83 82 94AGR090A 94 96 93 92 89 83 83 82 94AGR095A 95 96 94 93 90 85 86 83 95AGR100A 96 97 95 93 90 85 86 83 95

Note: Per ARI Standard 370

Sound levels are as important as unit cost and efficiency, and must be addressed before to the start ofany development program. Efforts by McQuay design engineers to design chillers that are sensitiveto the sound requirements of the market have paid off.

Background InformationSound is a vibration in an elastic medium and is essentially a pressure and particle displacementphenomena. A vibrating body produces compression waves and as the waves are emitted from thevibrating body, molecules are ultimately compressed. These values are transmitted through gas,liquid, solid-anything which is elastic or viscous.

The sound data provided in this section is presented with both sound pressure and sound powerlevels. Sound power is the total sound energy radiated by a source per unit of time integrated overthe surface through which the sound is radiated. Sound power is a calculated quantity and cannot bemeasured directly like sound pressure. Sound power is not dependent on the surroundingenvironment or distance from the source, as is sound pressure.

Sound pressure varies with the distance from the source and is dependent on its surroundings. Forexample, a brick wall located 10 feet from a unit will affect the sound pressure measurements differentlythan a brick wall at 20 feet. Sound pressure is measured in decibels (dB), which is a dimensionlessratio (on a logarithmic scale) between measured sound pressure and a reference sound pressure level.

Sound Pressure Levels - Full LoadAll sound pressure tables give the overall "A" weighted sound pressure levels which are consideredtypical of what may be measured in a free field with a hand held sound meter, in the absence of anynearby reflective surfaces. The sound pressure levels are measured at 30 feet (10 meters) from the sideof the unit at 100% unit load and ARI conditions. 95°F (35°C) ambient air temperature and 54/44°F(12/7°C) evaporator water temperatures for air-cooled units.


Sound Power LevelsAcoustical consultants may require sound power octave band data to perform a detailed acousticalanalysis. The tables that follow present sound power levels per ARI Standard 370, “Sound Rating ofLarge Outdoor Refrigerating and Air Conditioning Equipment”. These standards were developed toestablish uniform methods of determining the sound power radiated by large outdoor and indoorequipment. The aforementioned methods are based on providing sound power levels by octave bandand the overall ‘A’ weighted value. Measurements are taken over a prescribed area around the unitand the data is mathematically calculated to give the sound power, dB.

Sound Reduction due to Distance from the UnitThe distance between a source of sound and the location of the sound measurement plays animportant role in minimizing sound problems. The equation below can be used to calculate the soundpressure level at any distance if the sound power is known.

Sound pressure can be calculated at any distance from the unit if the sound power is known.

Lp=Lw-(20 log r) + (10 log Q) - .5

Lp = sound pressure

Lw = sound power

r = distance from unit in feet

Q = directionality factor

The directionality factor is a dimensionless number that compensates for the type of sound radiationfrom the source. Figure 6 shows the typical Q values of different reflecting surfaces.

For a unit sitting on a flat roof with no other reflective surfaces or attenuation due to grass, snow, etc.,between source and receiver: Q=2.

With Q=2, the equation simplifies to:

Lp = Lw - (20)(log r) + 2.5

Figure 6, "Q" Values

Uniform Spherical Radiation Uniform Hemispherical Radiation Uniform Radiation over 1/4 of

sphere

Q=1 no reflecting surface Q=2 single reflecting surface Q=4 two reflecting surfaces


Unit Orientation to Minimize SoundThe AGR reciprocating chiller’s sound is directional in nature allowing the contractor/engineer toposition the unit to minimize potential noise problems. Because the sound pressure levels are lower atboth ends of the unit than at the sides, the chiller should be oriented such that the control box end orend opposite the control box faces the direction where the lowest sound level is required.

The control box end provides an excellent acoustic barrier to the compressor sound as it covers onefull end of the unit. The sound pressure levels at the control box end will be 4 dBA less than on thesides.

Figure 7, Sound Directionality

Sound Pressure Levels - Low Ambient OperationUnit operation at a lower ambient temperature than 95°F will also result in lower sound pressure levels.The sound pressure level will decrease 1 dBA for ambient temperatures between 85°F to 94°F (29.4°Cto 34.4°C), 2 dBA for ambient temperatures between 75°F to 84°F (23.9°C to 28.9°C), and 3 dBA forambient temperatures between 65°F to 74°F (18.3°C to 23.3°C).


Pressure Drop Curves

Figure 8, Evaporator Pressure Drops

NOMINAL MAXIMUM MINIMUMFlow Flow Flow

UnitSize

PD(ft) of Water (gpm) (lps)



070AS/AM 16.0 162 10.22 40.5 270 17.04 6.8 101 6.39075AS/AM 9.6 168 10.60 24.0 280 17.67 4.3 105 6.62080AS/AM 11.7 187 11.80 29.6 312 19.66 5.1 117 7.37085AS/AM 13.5 203 12.81 33.3 338 21.35 5.9 127 8.00090AS/AM 10.5 208 13.12 26.3 347 21.87 4.5 130 8.20095AS/AM 12.0 226 14.26 30.0 377 23.76 5.2 141 8.91100AS/AM 13.4 240 15.14 33.6 400 25.24 5.7 150 9.46Note: Minimum and maximum flows are established to ensure the Delta-T for each unit size falls within the 6 - 16°F range forproper unit control. Contact factory for unit operation outside of minimum and maximum flows shown.


Electrical Data

Table 14, 60 Hz, Single Point Power Electrical DataPOWER SUPPLY

Field Wire Conduit HubAGRUnitSize

Volts

MinimumCircuit

Ampacity(MCA)

QuantityWire

GaugeQuantity

NominalSize

Max. Fuseor

HACR BreakerSize

208 322 3 400 1 2.50 450230 300 3 350 1 2.50 400380 190 3 3/0 1 2.00 250460 153 3 2/0 1 1.50 200

070AS070AM

575 114 3 #2 1 1.25 150

208 351 3 500 1 3.00 450230 329 3 400 1 2.50 450380 220 3 4/0 1 2.00 300460 163 3 2/0 1 1.50 225

075AS075AM

575 126 3 #1 1 1.50 150

208 384 6 3/0 2 2.00 500230 373 3 500 1 3.00 500380 240 3 250 1 2.50 300460 187 3 3/0 1 2.00 250

080AS080AM

575 151 3 2/0 1 1.50 200

208 411 6 4/0 2 2.00 500230 408 6 4/0 2 2.00 500380 256 3 300 1 2.50 350460 206 3 4/0 1 2.00 250

085AS085AM

575 171 3 3/0 1 2.00 225

208 411 6 4/0 2 2.00 500230 408 6 4/0 2 2.00 500380 256 3 300 1 2.50 350460 206 3 4/0 1 2.00 250

090AS090AM

575 171 3 3/0 1 2.00 225

208 461 6 250 2 2.00 600230 458 6 4/0 2 2.00 600380 269 3 300 1 2.50 350460 220 3 4/0 1 2.00 300

095AS095AM

575 176 3 3/0 1 2.00 225

208 501 6 250 2 2.00 700230 498 6 250 2 2.00 700380 279 3 300 1 2.50 350460 231 3 250 1 2.00 300

100AS100AM

575 180 3 3/0 1 2.00 250

All Electrical Data notes are on page 26


Table 15, 60 Hz, Compressor And Condenser Fan Motor Amp Draw Rated Load Amps Locked Rotor Amps

Compressors CompressorsAcross-The-Line Part Winding (1)

AGRUnitSize

VoltsNo.1

No.2

FanMotors(Each)

No. OfFan

Motors

FanMotors(Each) No. 1 No. 2 No. 1 No. 2

208 122 135 7.8 4 30.5 N.A. N.A. 400 463230 112 127 7.2 4 27.6 N.A. N.A. 340 340380 65 87 4.1 4 20.0 365 365 N/A N/A460 60 63 3.6 4 13.8 315 315 195 195

070AS070AM

575 42 48 3.0 4 11.0 245 245 152 152

208 135 135 7.8 6 30.5 N.A. N.A. 463 463230 127 127 7.2 6 27.6 N.A. N.A. 340 340380 87 87 4.1 6 20.0 365 365 N/A N/A460 63 63 3.6 6 13.8 315 315 195 195

075AS075AM

575 48 48 3.0 6 11.0 245 245 152 152

208 135 162 7.8 6 30.5 N.A. N.A. 463 654230 127 162 7.2 6 27.6 N.A. N.A. 340 654380 87 103 4.1 6 20.0 365 740 N/A N/A460 63 82 3.6 6 13.8 315 510 195 330

080AS080AM

575 48 68 3.0 6 11.0 245 405 152 262

208 162 162 7.8 6 30.5 N.A. N.A. 654 654230 162 162 7.2 6 27.6 N.A. N.A. 654 654380 103 103 4.1 6 20.0 740 740 N/A N/A460 82 82 3.6 6 13.8 510 510 330 330

085AS085AM

575 68 68 3.0 6 11.0 405 405 262 262

208 162 162 7.8 6 30.5 N.A. N.A. 654 654230 162 162 7.2 6 27.6 N.A. N.A. 654 654380 103 103 4.1 6 20.0 740 740 N/A N/A460 82 82 3.6 6 13.8 510 510 330 330

090AS090AM

575 68 68 3.0 6 11.0 405 405 262 262

208 162 202 7.8 6 30.5 N.A. N.A. 654 654230 162 202 7.2 6 27.6 N.A. N.A. 654 654380 103 113 4.1 6 20.0 740 740 N/A N/A460 82 93 3.6 6 13.8 510 510 330 330

095AS095AM

575 68 72 3.0 6 11.0 405 405 262 262

208 202 202 7.8 6 30.5 N.A. N.A. 654 654230 202 202 7.2 6 27.6 N.A. N.A. 654 654380 113 113 4.1 6 20.0 740 740 N/A N/A460 93 93 3.6 6 13.8 510 510 330 330

100AS100AM

575 72 72 3.0 6 11.0 405 405 262 262

Notes:1. Part winding start is a special option on 380 – 575 volt units.2. All Electrical Data notes are on page 26


Table 16, 60 Hz Single Point Power, Field Wiring DataWiring to Standard Wiring to Optional

Power Block Non-Fused Disconnect SwitchAGRUnitSize

VoltsTerminalAmps

Connector Wire Range(Copper Wire Only)

TerminalAmps

Connector Wire Range(Copper Wire Only)

208 335 # 4 - 400 MCM 400 250 - 500 MCM230 335 # 4 - 400 MCM 400 250 - 500 MCM380 335 # 4 - 400 MCM 250 #4 - 350 MCM460 335 # 4 - 400 MCM 250 #4 - 350 MCM

070AS070AM

575 335 # 4 - 400 MCM 150 #2 - 3/0

208 335 # 4 - 400 MCM 400 250 - 500 MCM230 335 # 4 - 400 MCM 400 250 - 500 MCM380 335 # 4 - 400 MCM 250 #4 - 350 MCM460 335 # 4 - 400 MCM 250 #4 - 350 MCM

075AS075AM

575 335 # 4 - 400 MCM 150 #2 - 3/0

208 840 (2 qty.) 1/0 - 600 MCM 400 250 - 500 MCM230 840 (2 qty.) 1/0 - 600 MCM 400 250 - 500 MCM380 335 # 4 - 400 MCM 250 #4 - 350 MCM460 335 # 4 - 400 MCM 250 #4 - 350 MCM

080AS080AM

575 335 # 4 - 400 MCM 250 #4 - 350 MCM

208 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM230 840 (2 qty.) 1/0 - 600 MCM 600 (2 qty.) 250 - 500 MCM380 335 # 4 - 400 MCM 400 250 - 500 MCM460 335 # 4 - 400 MCM 250 #4 - 350 MCM

085AS085AM

575 335 # 4 - 400 MCM 250 #4 - 350 MCM


090AS090AM

575 335 # 4 - 400 MCM 250 #4 - 350 MCM


095AS095AM

575 335 # 4 - 400 MCM 250 #4 - 350 MCM


100AS100AM

575 335 # 4 - 400 MCM 250 #4 - 350 MCM

All Electrical Data notes are on page 26


Notes for “Electrical Data Single Point” Power:1. Unit wire size ampacity (MCA) is equal to 125% of the largest compressor-motor RLA plus 100%

of RLA of all other loads in the circuit including the control transformer.

2. The control transformer is furnished. A separate 115v power supply can be used if desired.

3. If a separate 115V power supply is used for the control circuit, then the wire sizing amps is 10amps for all unit sizes.

4. Recommended power lead wire sizes for 3 conductors per conduit are based on 100% conductorampacity in accordance with NEC. Nominal voltage drop has been included. It is recommendedthat power leads be kept short. All terminal block connections must be made with copper (typeTHW) wire.

5. “Recommended Fuse Sizes or HACR breaker size” is selected at approximately 150% to 175% ofthe largest compressor RLA, plus 100% of all other loads in the circuit.

6. “Maximum Fuse or HACR breaker size” is selected based on 225% of the largest compressorRLA, plus 100% of all other loads in the circuit.

7. The recommended power lead wire sizes are based on an ambient temperature of 86°F (30°C).Ampacity correction factors must be applied for other ambient temperatures. Refer to theNational Electrical Code Handbook.

8. Must be electrically grounded according to national and local electrical codes.

9. MCA may vary slightly due to fan motor options such as SpeedTrol.

Voltage Limitations:Within ± 10 percent of unit nameplate rating

Notes for “Compressor and Condenser Fan Amp Draw”:1. Compressor RLA values are for wiring sizing purposes only and may be higher than nominal

operating current draw at rated capacity.

2. If unit is equipped with SpeedTrol condenser fan motors, the first motor on each refrigerant circuitis a single phase, 1hp motor, with a FLA of 2.8 amps at 460 volts and 5.6 amps at 208, 230 volts.

3. Compressor LRA for reduced inrush start are for the first winding of part-winding start only.

4. If the unit is equipped with SpeedTrol motors, the first motor is a single phase, 1 hp motor, with aLRA of 7.3 amps at 460 volts and 14.5 amps at 208, 230 volts.

Notes for “Field Wiring Data”1. The standard unit requires a single disconnect to supply electrical power to the unit. Power

supply must either be fused or use an HACR type circuit breaker.

2. Multiple point power connection for field wiring is available as an option. Two power terminalblocks are supplied in the unit, one for each system in the unit. Each power terminal blocksupplies both compressor and fan motor power for each system. The control transformer isfurnished and connected to the system #1 power terminal block.

3. All field wiring to unit power block or optional non-fused disconnect switch must be copper.

4. All field wire size values given in table apply to 75°C rated wire per NEC.


Figure 9, Typical Field Wiring with MicroTech Controller

See Note 3 for “Electrical Data Single Point Power” on page 26


Figure 10, Typical Field Wiring Diagram with UNT Controller

See note 3 for “Electrical Data Single Point Power” on page 26


Physical Data

AGR-AS, Packaged ChillerTable 17, AGR 070AS – AGR 085AS

AGR MODEL NUMBERPHYSICAL DATASTANDARD EFFICIENCY 070AS 075AS 080AS 085ASBASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2Unit Capacity @ ARI Conditions (1), Tons (kW) 67.5 (237.6) 70.1 (246.7) 77.9 (273.9) 84.7 (298.1)Number Of Refrigerant Circuits 2 2 2 2Unit Operating Charge, R-22, lbs. (kg) 60 (27.2) 84 (38.1) 84 (38.1) 86 (39.9) 86 (39.9) 86 (39.9) 86 (39.9) 86 (39.9)Unit Operating Charge, R-134a, , lbs. (kg) 63 (28.6) 88 (40.0) 88 (40.0) 90 (41.9) 90 (41.9) 90 (41.9) 90 (41.9) 90 (41.9)Cabinet Dimensions, LxWxH, In. 94.0 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2Cabinet Dimensions, LxWxH, (mm) 2388 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444Unit Operating Weight, Lbs. (kg) 4276 (5506) 5506 (2497) 5740 (2604) 5921 (2686)Unit Shipping Weight, Lbs. (kg) 4169 (5359) 5359 (2431) 5593 (2537) 5774 (2619)Add'l Weight If Copper Finned Coils, Lbs. (kg) 830 (375) 1245 (565) 1245 (565) 1245 (565)COMPRESSORSType Semi-Hermetic Semi-Hermetic Semi-Hermetic Semi-HermeticNominal Horsepower 35 40 40 40 40 50 50 50Number Of Cylinders Per Compressor 6 6 6 6 6 8 8 8Oil Charge Per Compressor, oz. 140 255 255 255 255 255 255 255Oil Charge Per Compressor, (g) (3969) (7229) (7229) (7229) (7229) (7229) (7229) (7229)CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENTStandard Staging - Circuit #1 in Lead 0-16-33-49-67 0-17-33-50-67 0-15-42-58-73 0-25-50-63-75

-83-100 -83-100 -86-100 -88-100Standard Staging - Circuit #2 in Lead 0-17-33-51-67 0-17-33-50-67 0-27-42-56-71 0-25-50-63-75

-84-100 -83-100 -85-100 -88-100CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLINGCoil Face Area, sq. ft. 58 58 87 87 87 87 87 87Coil Face Area, (m2) (5.4) (5.4) (8.1) (8.1) (8.1) (8.1) (8.1) (8.1)Finned Height x Finned Length, In. 100x 83.5 100x 83.5 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3

Finned Height x Finned Length, (mm)2032 x2121

2032 x2121

2540 x3183

2540 x3183

2540 x3183

2540 x3183

2540 x3183

2540 x3183

Fins Per Inch x Rows Deep 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3Pumpdown capacity @ 90% lbs. (kg) 108 (49) 108 (49) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73)Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103)CONDENSER FANS – DIRECT DRIVE PROPELLER TYPENumber Of Fans - Fan Diameter, In. (mm) 4 - 28 (712) 6 - 28 (712) 6 - 28 (712) 6 - 28 (712)Number Of Motors - HP (kW) 4 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5)Fan And Motor RPM, 60Hz 1140 1140 1140 114060 Hz Fan Tip Speed, fpm (m/Sec) 8357 (35.4) 8357 (35.4) 8357 (35.4) 8357 (35.4)60 Hz Total Unit Airflow, cfm (m3/sec) 40800 (19.3) 61200 (28.9) 61200 (28.9) 61200 (28.9)DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND THRU-TUBEDiameter, in. - Length, ft. 12.75- 4 12.75 - 5.5 12.75 - 5.5 12.75 - 5.5Diameter, (mm) – Length, (mm) 324 - 1220 324 - 1676 324 - 1676 324 - 1676Water Volume, gallons, (l) 12.8 (48.5) 17.6 (66.6) 17.6 (66.6) 17.6 (66.6)Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207) 175 (1207)Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552) 225 (1552)Water Inlet / Outlet Victaulic Connections, In. (mm) 5 (141.3) 5 (141.3) 5 (141.3) 5 (141.3)Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5)Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5)NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range, R-22.


Table 18, AGR 090AS – AGR 100ASPHYSICAL DATA AGR MODEL NUMBERSTANDARD EFFICIENCY 090AS 095AS 100ASBASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2Unit Capacity @ ARI Conditions (1), Tons (kW) 86.7 (305.2) 94.0 (330.1) 100.1 (352.0)Number Of Refrigerant Circuits 2 2 2Unit Operating Charge, R-22, lbs.(kg) 90 (40.8) 90 (40.8) 90 (40.8) 90 (40.8) 92 (41.7) 92 (41.7)Unit Operating Charge, R-134a, lbs.(kg) 94 (42.8) 94 (42.8) 94 (42.8) 94 (42.8) 94 (42.8) 94 (42.8)Cabinet Dimensions, LxWxH, In. 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2Cabinet Dimensions, LxWxH, (mm) 3463 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444Unit Operating Weight, Lbs. (kg) 6184 (2805) 6194 (2810) 6194 (2810)Unit Shipping Weight, Lbs. (kg) 6008 (2725) 6018 (2730) 6018 (2730)Add'l Weight If Copper Finned Coils, Lbs. (kg) 1245 (565) 1245 (565) 1245 (565)COMPRESSORSType Semi-Hermetic Semi-Hermetic Semi-HermeticNominal Horsepower 50 50 50 60 60 60Number Of Cylinders Per Compressor 8 8 8 8 8 8Oil Charge Per Compressor, oz. 255 255 255 255 255 255Oil Charge Per Compressor, (g) (7229) (7229) (7229) (7229) (7229) (7229)CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENTStandard Staging - Circuit #1 in Lead 0-25-50-63-75 0-23-50-61-75 0-25-50-63-75

-88-100 -86-100 -88-100Standard Staging - Circuit #2 in Lead 0-25-50-63-75 0-27-50-64-75 0-25-50-63-75

-88-100 -89-100 -88-100CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLINGCoil Face Area, sq. ft. 87 87 87 87 87 87Coil Face Area, (m2) (8.1) (8.1) (8.1) (8.1) (8.1) (8.1)Finned Height x Finned Length, In. 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3Finned Height x Finned Length, (mm) 2540 x

31832540 x3183

2540 x3183

2540 x3183

2540 x3183

2540 x3183

Fins Per Inch x Rows Deep 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3Pumpdown capacity @ 90% lbs. (kg) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73)Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103)CONDENSER FANS – DIRECT DRIVE PROPELLER TYPENumber Of Fans - Fan Diameter, in. (mm) 6 - 28 (712) 6 - 28 (712) 6 - 28 (712)Number Of Motors - HP (kW) 6 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5)Fan And Motor RPM, 60Hz 1140 1140 114060 Hz Fan Tip Speed, fpm (m/sec) 8357 (35.4) 8357 (35.4) 8357 (35.4)60 Hz Total Unit Airflow, cfm (m3/sec) 61200 (28.9) 61200 (28.9) 61200 (28.9)DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND THRU-TUBEDiameter, in. - Length, ft. 14 - 5.5 14 - 5.5 14 - 5.5Diameter, (mm) – Length, (mm) 356 - 1676 356 - 1676 356 - 1676Water Volume, gallons, (l) 21.2 (80.3) 21.2 (80.3) 21.2 (80.3)Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207)Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552)Water Inlet / Outlet Victaulic Connections, In. (mm) 5 (141.3) 5 (141.3) 5 (141.3)Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5)Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5)NOTE: Nominal capacity based on 95°F ambient air and 54°F/44°F water range.


AGR-AM, Remote EvaporatorTable 19, AGR 070AM - 085AM

PHYSICAL DATA AGR MODEL NUMBERSTANDARD EFFICIENCY 070AM 075AM 080AM 085AMOUTDOOR UNIT BASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2Number Of Refrigerant Circuits 2 2 2 2Unit Operating Charge, R-22, lbs. (kg) 60 (27.2) 84 (38.1) 84 (38.1) 86 (39.9) 86 (39.9) 86 (39.9) 86 (39.9) 86 (39.9)Unit Operating Charge, R-134a, , lbs. (kg) 63 (28.6) 88 (40.0) 88 (40.0) 90 (41.9) 90 (41.9) 90 (41.9) 90 (41.9) 90 (41.9)Cabinet Dimensions, LxWxH, In. 94.0 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2Cabinet Dimensions, LxWxH, (mm) 2388 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444Unit Operating Weight, Lbs. (kg) 3978 (1802) 4509 (2043) 4743 (2149) 4924 (2331)Unit Shipping Weight, Lbs. (kg) 3855 (1746) 4384 (1986) 4618 (2092) 4799 (2174)Add'l Weight If Copper Finned Coils, Lbs. (kg) 830 (375) 1245 (565) 1245 (565) 1245 (565) COMPRESSORSType Semi-Hermetic Semi-Hermetic Semi-Hermetic Semi-HermeticNominal Horsepower 35 40 40 40 40 50 50 50Number Of Cylinders Per Compressor 6 6 6 6 6 8 8 8Oil Charge Per Compressor, oz. 140 255 255 255 255 255 255 255Oil Charge Per Compressor, (g) (3969) (7229) (7229) (7229) (7229) (7229) (7229) (7229) CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENTStandard Staging - Circuit #1 in Lead 0-16-33-49-67 0-17-33-50-67 0-15-42-58-73 0-25-50-63-75

-83-100 -83-100 -86-100 -88-100Standard Staging - Circuit #2 in Lead 0-17-33-51-67 0-17-33-50-67 0-27-42-56-71 0-25-50-63-75

-84-100 -83-100 -85-100 -88-100 CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLINGCoil Face Area,Sq. Ft. 58 58 87 87 87 87 87 87Coil Face Area, (m2) (5.4) (5.4) (8.1) (8.1) (8.1) (8.1) (8.1) (8.1)Finned Height x Finned Length, In. 100x 83.5 100x 83.5 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3Finned Height x Finned Length, (mm) 2032 x

21212032 x2121

2540 x3183

2540 x3183

2540 x3183

2540 x3183

2540 x3183

2540 x3183

Fins Per Inch x Rows Deep 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3Pumpdown capacity @ 90% Lbs. (kg) 108 (49) 108 (49) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73)Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) CONDENSER FANS - DIRECT DRIVE PROPELLER TYPENumber Of Fans - Fan Diameter, In. (mm) 4 - 28 (712) 6 - 28 (712) 6 - 28 (712) 6 - 28 (712)Number Of Motors - HP (kW) 4 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5)Fan And Motor RPM, 60Hz 1140 1140 1140 114060 Hz Fan Tip Speed, FPM (M/Sec) 8357 (35.4) 8357 (35.4) 8357 (35.4) 8357 (35.4)60 Hz Total Unit Airflow, CFM (M3/sec) 40800 (19.3) 61200 (28.9) 61200 (28.9) 61200 (28.9)

REMOTE DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND -TUBEModel Number, CDE 1204-1 1255-1 1255-1 1255-1Operating Weight Lbs (kg) 777 (352) 997 (452) 997 (452) 997 (452)Shipping Weight Lbs (kg) 745 (338) 925 (420) 925 (420) 925 (420)Diameter, in. - Length, Ft. 12.75- 04 12.75 - 5.5 12.75 - 5.5 12.75 - 5.5Diameter, (mm) - Length, (mm) 324 - 1220 324 - 1676 324 - 1676 324 - 1676Water Volume, Gallons, (L) 12.8 (48.5) 17.6 (66.6) 17.6 (66.6) 17.6 (66.6)Refrigerant Volume, cu. Ft. (cu. m.) 1.25 (.0353) 1.69 (.0478) 1.69 (.0478) 1.69 (.0478)Operating Charge, Per System, Lbs (kg) (Note 1) 2.8 (1.27) 3.8 (1.72) 3.8 (1.72) 3.8 (1.72)Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207) 175 (1207)Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552) 225 (1552)Water Inlet / Outlet Victaulic Connections, In. (mm) 5 (141.3) 5 (141.3) 5 (141.3) 5 (141.3)Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5)Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5) .375 (9.5)NOTES:1. Includes evaporator. Does not include suction and liquid line charge. Outdoor unit and evaporator are shipped with R-22 holding charge.


Table 20, AGR 090AM - 100AMPHYSICAL DATA AGR MODEL NUMBERSTANDARD EFFICIENCY 090AM 095AM 100AMOUTDOOR UNIT BASIC DATA Ckt.1 Ckt.2 Ckt.1 Ckt.2 Ckt.1 Ckt.2Number Of Refrigerant Circuits 2 2 2Unit Operating Charge, R-22, lbs.(kg) 90 (40.8) 90 (40.8) 90 (40.8) 90 (40.8) 92 (41.7) 92 (41.7)Unit Operating Charge, R-134a, lbs.(kg) 94 (42.8) 94 (42.8) 94 (42.8) 94 (42.8) 94 (42.8) 94 (42.8)Cabinet Dimensions, LxWxH, In. 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2 136.4 x 88.2 x 96.2Cabinet Dimensions, LxWxH, (mm) 3463 x 2241 x 2444 3463 x 2241 x 2444 3463 x 2241 x 2444Unit Operating Weight, Lbs. (kg) 5858 (2654) 5068 (2296) 5068 (2296)Unit Shipping Weight, Lbs. (kg) 4933 (2235) 4943 (2239) 4943 (2239)Add'l Weight If Copper Finned Coils, Lbs. (kg) 1245 (565) 1245 (565) 1245 (565) COMPRESSORSType Semi-Hermetic Semi-Hermetic Semi-HermeticNominal Horsepower 50 50 50 60 60 60Number Of Cylinders Per Compressor 8 8 8 8 8 8Oil Charge Per Compressor, oz. 255 255 255 255 255 255Oil Charge Per Compressor, (g) (7229) (7229) (7229) (7229) (7229) (7229) CAPACITY REDUCTION STEPS - PERCENT OF COMPRESSOR DISPLACEMENT

Standard Staging - Circuit #1 in Lead 0-25-50-63-75 0-23-50-61-75 0-25-50-63-75-88-100 -86-100 -88-100

Standard Staging - Circuit #2 in Lead 0-25-50-63-75 0-27-50-64-75 0-25-50-63-75-88-100 -89-100 -88-100

CONDENSERS - HIGH EFFICIENCY FIN AND TUBE TYPE WITH INTEGRAL SUBCOOLINGCoil Face Area,Sq. Ft. 87 87 87 87 87 87Coil Face Area, (m2) (8.1) (8.1) (8.1) (8.1) (8.1) (8.1)Finned Height x Finned Length, In. 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3 100x125.3Finned Height x Finned Length, (mm) 2540 x

31832540 x3183

2540 x3183

2540 x3183

2540 x3183

2540 x3183

Fins Per Inch x Rows Deep 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3 16 x 3Pumpdown capacity @ 90% Lbs. (kg) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73) 162 (73)Maximum Relief Valve Pressure Setting, psig (kPa) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) 450 (3103) CONDENSER FANS - DIRECT DRIVE PROPELLER TYPENumber Of Fans - Fan Diameter, In. (mm) 6 - 28 (712) 6 - 28 (712) 6 - 28 (712)Number Of Motors - HP (kW) 6 - 2.0 (1.5) 6 - 2.0 (1.5) 6 - 2.0 (1.5)Fan And Motor RPM, 60Hz 1140 1140 114060 Hz Fan Tip Speed, FPM (M/Sec) 8357 (35.4) 8357 (35.4) 8357 (35.4)60 Hz Total Unit Airflow, CFM (M3/sec) 61200 (28.9) 61200 (28.9) 61200 (28.9)

REMOTE DIRECT EXPANSION EVAPORATOR - BAFFLED SHELL AND -TUBEModel Number, CDE 1455-1 1455-1 1455-1Operating Weight Lbs (kg) 1126 (511) 1126 (511) 1126 (511)Shipping Weight Lbs (kg) 1025 (465 1025 (465 1025 (465Diameter, in. - Length, Ft. 14 - 5.5 14 - 5.5 14 - 5.5Diameter, (mm) - Length, (mm) 356 - 1676 356 - 1676 356 - 1676Water Volume, Gallons, (L) 21.2 (80.3) 21.2 (80.3) 21.2 (80.3)Refrigerant Volume, cu. Ft. (cu. m.) 2.33 (.0659) 2.33 (.0659) 2.33 (.0659)Operating Charge, Per System, Lbs (kg) (Note 1) 5.2 (2.36) 5.2 (2.36) 5.2 (2.36)Maximum Water Pressure, psig (kPa) 175 (1207) 175 (1207) 175 (1207)Maximum Refrigerant Working Pressure, psig (kPa) 225 (1552) 225 (1552) 225 (1552)Water Inlet / Outlet Victaulic Connections, In. (mm) 5 (141.3) 5 (141.3) 5 (141.3)Drain - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5)Vent - NPT int, In. (mm) .375 (9.5) .375 (9.5) .375 (9.5)NOTES:1. Includes evaporator. Does not include suction and liquid line charge. Outdoor unit and evaporator are shipped with R-22 holding charge.


Dimensional Data

Packaged Chiller, AGR-ASFigure 11, Dimensions AGR 070AS

WeightsDimensions

Center of Gravityinch (mm) Operating Shipping

AGRModel

Number A B C D E F X Y Z lb (kg) lb (kg)

Additional Weight with Copper

Fin Coils lb (kg)

070AS 96.2(2444)

91.7(2329)

60.0(1525)

23.9(607)

4.3(108)

16.0(406)

45.0(1143)

41.8(1062)

38.8(986)

4755(2155)

4650(2107)

830(375)


Figure 12, Dimensions AGR 075AS through 100AS

WeightsDimensions

Center of Gravityinch (mm) Operating Shipping

AGRModel

Number A C D E F X Y Z lb. (kg) lb. (kg)

Additional Weightfor Units with Copper

Fin Coils lb (kg)

075AS 96.2(2444)

99.2(2520)

45.2(1148)

4.4(112)

17.5(444)

60.4(1534)

42.2(1072)

37.3(947)

5506(2495)

5360(2429)

1245(565)

080AS 96.2(2444)

99.2(2520)

45.2(1148)

4.4(112)

17.5(444)

60.4(1534)

41.5(1054)

36.9(937)

5740(2605)

5595(2540)

1245(565)

085AS 96.2(2444)

99.2(2520)

45.2(1148)

4.4(112)

17.5(444)

60.4(1534)

40.8(1036)

36.2(919)

5920(2685)

5775(2620)

1245(565)

090AS 96.2(2444)

99.2(2520)

45.2(1148) 3.8 (96) 17.5

(444)60.4

(1534)42.0

(1067)36.8(935)

6185(2805)

6010(2725)

1245(565)

095AS 96.2(2444)

99.2(2520)

45.2(1148) 3.8 (96) 17.5

(444)60.4

(1534)42.0

(1067)35.4(899)

6195(2810)

6020(2730)

1245(565)

100AS 96.2(2444)

99.2(2520)

45.2(1148) 3.8 (96) 17.5

(444)60.4

(1534)42.0

(1067)35.4(899)

6195(2810)

6020(2730)

1245(565)


Remote Evaporator, AGR-AMFigure 13, AGR 070AM

COMPRESSOR # 1 (SUCTION #1) COMPRESSOR # 2 (SUCTION #2)inch (mm) inch (mm)

AGRMODEL

NUMBER A C D E F G H070AM 96.2 (1444) 49.34 (1253) 20.88 (597) 23.52 (597) 9.34 (237) 20.88 (597) 25.52 (648)

CENTER OF GRAVITY UNIT WEIGHTS ADD'L FOR SUCTION LIQUIDinch (mm) lb (kgs) COPPER FIN CONN. CONN.

AGRMODEL

NUMBER X Y Z OPERATING SHIPPING lb (kgs) in. in070AM 44.0 (1118) 37.5 (953) 43.0 (1092) 4090 (1855) 3980 (1805) 830 (375) 2 1/8 1 1/8


Figure 14, AGR 075AM - AGR 100AM

COMPRESSOR # 1 (SUCTION #1) COMPRESSOR # 2 (SUCTION #2)inch (mm) inch (mm)

AGRMODEL

NUMBER A C D E F G H075AM 96.2 (2444) 88.5 (2248) 20.9 (531) 25.5 (648) 48.5 (1232) 20.9 (531) 25.5 (648)080AM 96.2 (2444) 88.5 (2248) 20.9 (531) 25.5 (648) 49.0 (1245) 23.9 (608) 27.8 (707)085AM 96.2 (2444) 86.0 (2184) 23.9 (608) 27.8 (707) 49.0 (1245) 23.9 (608) 27.8 (707)090AM 96.2 (2444) 86.0 (2184) 23.9 (608) 27.8 (707) 49.0 (1245) 23.9 (608) 27.8 (707)095AM 96.2 (2444) 86.0 (2184) 23.9 (608) 27.8 (707) 49.0 (1245) 23.9 (608) 27.8 (707)100AM 96.2 (2444) 86.0 (2184) 23.9 (608) 27.8 (707) 49.0 (1245) 23.9 (608) 27.8 (707)

CENTER OF GRAVITY UNIT WEIGHTSinch (mm) lb (kgs)

AGRMODEL

NUMBER X Y Z OPERATING SHIPPING

ADD'L FORCOPPER FIN

lb (kgs)

SUCTIONCONN.

in

LIQUIDCONN.

In

075AM 59.8 (1519) 37.5 (953) 41.5 (1054) 4670 (2118) 4510 (2045) 1245 (565) 2 1/8 1 1/8

080AM 59.8 (1519) 36.9 (937) 40.8 (1036) 4905 (2224) 4745 (2152) 1245 (565)2 1/8,2

5/81 1/8

085AM 59.8 (1519) 36.3 (922) 39.9 (1013) 5089 (2308) 4925 (2234) 1245 (565) 2 5/8 1 1/8090AM 59.8 (1519) 37.3 (947) 40.9 (1039) 5224 (2370) 5060 (2295) 1245 (565) 2 5/8 1 1/8095AM 59.8 (1519) 37.3 (947) 39.3 (998) 5234 (2374) 5070 (2300) 1245 (565) 2 5/8 1 1/8100AM 59.8 (1519) 37.3 (947) 39.3 (998) 5238 (2376) 5070 (2300) 1245 (565) 2 5/8 1 1/8


CDE EvaporatorsFigure 15, CDE Evaporators

CDE USED ON WATER CONNECTION REFRIGERANT CONNECTIONMODEL AGR-AM inch (mm) inch (mm)

NUMBER MODEL C L P T M NCDE-1204-1 070 36.0 (914) 9.5 (241) 5.0 (127) 7.0 (178) 2 1/8 (54) 1 3/8 (35)CDE-1255-1 075, 080, 085 54.0 (1372) 11.0 (278) 5.0 (127) 7.0 (178) 2 1/8 (54) 1 3/8 (35)CDE-1455-1 090, 095, 100 54.0 (1372) 11.0 (278) 5.0 (127) 7.0 (178) 2 1/8 (54) 1 3/8 (35)

CDE DIMENSIONAL DATAMODEL inch (mm)

NUMBER A B D E F GCDE-1204-1 53.5 (1359) 17.5 (445) 8.8 (224) 17.5 (445) 12.1 (307) 2.3 (58)CDE-1255-1 71.5 (1816) 17.5 (445) 8.8 (224) 19.0 (483) 12.1 (307) 3.0 (76)CDE-1455-1 71.5 (1816) 19.1 (485) 8.8 (224) 19.0 (483) 12.1 (307) 3.0 (76)

CDEMODEL

DIMENSIONAL DATAinch (mm)

NUMBER K R S U V W BBCDE-1204-1 3.0 (76) 50.0 (1270) 52.0 (1321) 1.8 (45) 2.8 (71) 16.0 (406 14.0 (356)CDE-1255-1 3.0 (76) 68.0 (1727) 70.0 (1778) 1.8 (45) 2.8 (71) 16.0 (406) 14.0 (356)CDE-1455-1 3.0 (76) 68.0 (1727) 70.0 (1778) 1.8 (45) 2.8 (71) 17.6 (447) 14.0 (356)


Application Data

Unit PlacementAGR units are for outdoor applications andcan be mounted either on a roof or at groundlevel. For roof mounted applications, installthe unit on a steel channel or I-beam frameto support the unit above the roof. Forground level applications, install the unit ona substantial base that will not settle. A one-piece concrete slab with footings extendedbelow the frost line is recommended. Besure the foundation is level within1/2"(13mm) over its length and width. Thefoundation must be strong enough tosupport the weights listed in the PhysicalData Tables.

ClearancesDo not block the flow of air to and fromthe condenser coil. Restricting airflowor allowing air recirculation will resultin a decrease in unit performance andefficiency because discharge pressuresare increased. There must be noobstruction above the unit that woulddeflect discharge air downward whereit could be recirculated back to the inletof the condenser coil. The condenserfans are propeller type and will notoperate with ductwork.

Install the unit with enough sideclearance for air entrance to the coiland for servicing. Provide serviceaccess to the evaporator, compressors,electrical control panel and pipingcomponents.

Do not allow debris to accumulate nearthe unit where it could be drawn intothe condenser coil. Keep condensercoils and fan discharge free of snow orother obstructions to permit adequateairflow for proper unit operation.

Sound IsolationThe ultra-low sound levels for the AGRchiller is sufficient for mostapplications. However, there will be applications where sound levels are an issue. Avoid locationsbeneath windows or between structures where normal operating sounds may be objectionable.Reduce structurally transmitted sound by isolating water lines, electrical conduit and the unit itself.Use wall sleeves and rubber isolated piping hangers to reduce transmission of water or pump noiseinto occupied spaces. Use flexible electrical conduit to isolate sound through electrical conduit.

Figure 16, Clearances

The recommended minimum side clearance between two units is 10 feet (3048mm). Distance less than 10 feet (3048mm) can result in air recirculation.

D I S C H A R G E AIR

DISCHARGE

AIR DISCHARGE

AIR DISCHARGE

The minimum clearance to a side wall or building taller than theunit height is 6 feet (1828mm) provided no solid wall above 6 feet(1830mm) tall is closer than 8 feet (2438mm) to the oppositeside of the unit. (consult factory for special situations.)

The unit must not be installed in a pit or enclosure that is deeper or taller than the height of the unit unless extra space is provided, (consult factory) the minimum clearance on each side of the unit is 8 feet (2438mm) when installed in a pit.

8 FT.

10 FT.

AIR FLOW

AIR FLOWAIR FLOW

AIR FLOW

AIR FLOW AIR FLOW

AIR FLOW


Spring isolators are effective in reducing the low amplitude sound generated by reciprocatingcompressors and for unit isolation in sound sensitive areas.

Typical Chilled Water PipingFlush the system water piping thoroughly before making connections to the unit evaporator. Install astrainer of 40 mesh in the return water line before the inlet to the chiller. Design the water piping so thechilled water circulating pump discharges into the evaporator inlet.

Connect the return water line to the evaporator inlet connection. Connect the supply water line to theevaporator outlet connection.

Install and calibrate a flow switch in the horizontal piping of the supply (evaporator outlet) water line.

Provide drain connections at low points in the system to permit complete drainage of the system.Locate air vents at the high points in the system to purge air out of the system. A vent connection ontop of the evaporator vessel allows air to be purged out of the evaporator. Purge air from the watersystem before unit start-up to ensure adequate flow through the evaporator.

Install pressure gauges in the inlet and outlet water lines to the evaporator. Measure pressure dropthrough the evaporator and compare to flow as shown in Figure 8. Vibration eliminators arerecommended in both the supply and return water lines.

Insulate chilled water piping to reduce heat loss and prevent condensation. Chillers not running inthe winter should have their water systems thoroughly drained to protect against freezing. If thechiller operates year round, or if the system is not drained for the winter, protect the chilled waterpiping exposed to outdoor temperature against freezing. Wrap the lines with a heater cable and addproper amount of glycol to the system to further protect the system.

The total water volume in the system should be sufficient to prevent “on-off” cycling. Turnover rateshould not be less than 15 minutes for normal variable loads. Turnover rate for process cooling or aconstant load, should not be less than 6 minutes.

Chilled Water PipingThe thermostat sensor is factory mounted in the leaving water thermowell on AS units. If an optionalhigh return water sensor is provided, install sensor bulb in a field supplied tee or strap to the outsideof the water line.

Figure 17, Typical Chilled Water Piping


Series Compared to Parallel OperationConsider system pressure drop when designing the water piping. Parallel piped systems have half ofthe total system flow going through the evaporator of each chiller, reducing the individual unit andtotal system pressure drop.

Series piped evaporators require that the total system water flows through both evaporators. Notonly is the pressure drop through each evaporator increased but the pressure drops must be addedtogether to obtain the total evaporator pressure drop. Series piped evaporators normally require largercirculating pumps for the chilled water system.

Temperature and Water Flow LimitationsAGR units are designed to operate in temperatures from 40°F (4.5 °C) to 115°F (46°C). A low ambientoption with SpeedTrol condenser fan control allows operation down to 0°F (-18°C). The minimumambient temperature is based on still conditions where the wind is not greater than five mph. Greaterwind velocities directly into the unit condenser coil will result in reduced discharge pressure,decreasing the minimum operating ambient temperature. When possible, position the unit on thedown wind side of the building or where the unit will be least affected by wind. Field installed windbaffles are available. The baffles allow the chiller to operate effectively down to the ambienttemperature for which the unit was designed.

Evaporator flow rates below the minimum values may result in laminar flow causing freeze-upproblems, scaling and poor control. Flow rates above the maximum values will result in unacceptablepressure drops and may cause excessive nozzle and tube erosion, potentially leading to failure.

Low Temperature ApplicationsCompressor unloading is acceptable for applications with 35°F or higher leaving fluid temperatures(LFT). For applications where the (LFT) is less than 35°F, only full load compressor operation isallowed. Motor cooling can become a problem due to reduced refrigerant flow. If compressor part loadoperation is required below 35°F LFT, contact the factory for additional requirements. For applicationswith 35 degrees LFT, it is acceptable to use UNT or Microtech controls provided that only one LFTsetpoint is needed.

Ice Storage ApplicationsMicrotech controls must be used for ice storage applications where leaving fluid temperatures arebelow 32°F. The Microtech has logic to change setpoints from the low ice making mode to highernormal comfort cooling setpoints. It is important that the Microtech controller receive a signal toconvert from ice mode to normal operating mode. Microtech includes the logic to keep compressorsfully loaded when operating in the ice mode. The double insulation thickness option is recommend toprevent sweating.

Two Pipe SystemsWhen the same supply and return lines are used for both heating and cooling water, severallimitations should be observed. The maximum allowable temperature to the evaporator should notexceed 100°F in a non-operating mode. The maximum allowable temperature for system changeoverfrom heating to cooling is 90°F entering the evaporator. System controls provided by others shouldprevent chiller operation until the loop temperature drops to 90 degrees and prevent water above100°F from entering the evaporator under any circumstances. When the loop water temperatureranges between 75 and 90 degrees entering the evaporator, the high return water staging thermostatshould be used to prevent compressor overloading.

System Water Volume Considerations:All chillers need adequate time to recognize a load change, respond to the change and stabilizewithout short cycling the compressor. The water volume in the system and the size of the piping loopis a critical consideration. Good engineering practice is to have a minimum water volume of seventimes the flow rate (GPM) for comfort cooling applications. For process applications where the load


can change quickly, contact the factory for recommendations. A water storage tank (provided byothers) may be required to increase the system water volume in some systems.

Evaporator Freeze ProtectionEvaporator freeze-up can be a concern in the application of air-cooled water chillers. To protectagainst freeze-up, insulation and an electric heater cable are furnished with the unit. This protects theevaporator down to -20°F (-29°C) ambient. Although the evaporator is equipped with freezeprotection, it does not protect water piping external to the unit or the evaporator if there is a powerfailure or heater cable burnout. Consider the following recommendations for additional protection.

1. If the unit will not be operated during the winter, drain evaporator and chilled water piping andflush with glycol. Drain and vent connections are provided on the evaporator to ease draining.

2. Add a glycol solution to the chilled water system to provide freeze protection. The freeze pointshould be approximately ten degrees below minimum design ambient temperature.

3. Continuous circulation of water through the evaporator and piping.

4. Insulation and heat tracing the chilled water piping.

The evaporator heater cable is wired to the 115 volt circuit in the control box. This power should besupplied from a separate source, but it may be supplied from the control circuit. Operation of theheater cable is automatic through the ambient sensing thermostat that energizes the evaporator heatercable for protection against freeze-up. Unless the evaporator is drained in the winter, the disconnectto the evaporator heater must not be open.

Extended ShutdownThis unit is equipped with a recycling pumpdown control system. This permits the compressors torun and re-pumpdown following a 2 hour “off” cycle if the refrigerant evaporator pressure is highenough to close the low pressure switch (57 to 60 psig). If the unit is expected to be off for anextended period of time, completely de-energize the unit except for piping and chiller vessel heat tape.

Refrigerant Piping

IntroductionProper refrigerant piping can represent the difference between a reliable, trouble free system andmonths or years of inefficient, problematic performance. The following section is based on ASHRAEinformation.

System concerns related to piping are:

1. Refrigerant pressure drop

2. Solid liquid feed to the expansion valve(s)

3. Continuous oil return

Of the three listed, the most important and least understood is number 3. “Continuous oil return”. Thefailure of oil to return at or close to the rate of displacement from the compressor can result in oiltrapping and ultimate compressor failure.

On the other hand, the instantaneous return of a large volume of compressor oil, as a slug, can beequally damaging to a compressor.

Also more oil is displaced at start-up of a compressor than occurs during a normal running period.Thus, if a compressor experiences excessive starts because of recycling pumpdown control, the largerquantity of oil pumped out is trapped in the condenser with the refrigerant charge, and may not returnregardless of the adequacy of the piping system.

A similar problem to a lesser extent occurs when the equipment is oversized for the available coolingload.


Extreme care should be exercised to assure that both piping and controls are suitable for theapplication such that displaced oil is returned to the compressor moderately. Note, too, that oil lossto the system can be due to a hang up in the evaporator, as well as in the piping.

SUCTION LINESMcQuay recommends the use of ASHRAE for guidelines in sizing and routing piping with oneexception. See the current ASHRAE Handbook Refrigeration Edition, Chapter 2 for tables andguidelines. The single exception is to the piping of direct expansion cooling coils located above thecompressors. In all cases, regardless of whether the equipment has pumpdown control or not, a trapin the suction line equal to the height of the coil section is recommended. In its absence, upon apower failure, all of the liquid in the coil will fall by gravity to the compressor below.

Suction line gas velocities may range between 900 and 4000 feet per minute. Consideration should begiven to the possibility of objectionable noise in or adjacent to occupied space. Where this is aconcern, gas velocities on the low side are recommended.

Routing must also take into account the requirement established in the latest ANSI/ASHRAE 15.

To size the suction line, determine:

a. The maximum tons for the circuit

b. The actual length in feet

c. The equivalent length contributed by elbows, fittings, valves or other refrigerant specialties.ASHRAE Tables 2-10, 11 & 12

d. If a vertical riser exists including the trap at the coil, determine the minimum tons for thecircuit.

Add b and c above to obtain the total equivalent feet. Use ASHRAE Table 3 (for R22) or Table 4 (forR134a). Suction line selections are based upon the pressure equivalent of a 2ºF loss per 100equivalent feet.

Select a line size that displays an equal or slightly larger tons then that determined in a) above.

To determine the actual line loss:

1. Modify the table tons by the value in Note 4 of Table 3 or 4 for the design condensingtemperature.

2. Use the formula in Note 3 to calculate the line loss in terms of the saturation temperature.

3. Convert the saturation temperature loss calculated to a pressure drop equivalent using the(Delta) listed in the table for the comparable delta temperature.

Caution: Excessive pressure drop is undesirable because:

• It reduces available compressor capacity.

• It increases power consumed from the net tons realized.

• It may affect the performance of both the evaporator and the expansion valve previouslyselected for the application.

Note: The line loss calculated, expressed in temperature, or PSID pressure drop will be used toestablish the temperature required at the evaporator to produce the required cooling, as well as, thesuction pressure that the compressor must operate at to deliver the required capacity.

Having selected the suction line size, based upon total equivalent length and maximum tons, verify theline size selected will maintain entrainment of the lubricating oil up any vertical risers at the minimumtons for the circuit. See d above, and ASHRAE Table 2-13.

Note: If the line size selected will not maintain satisfactory oil return in a suction riser, the followingoptions are available:


The vertical length can be sized smaller to accommodate the lower circuit tons at reduced load.

Minimum compressor capacity can be increased by eliminating the lowest step of compressorcapacity.

Hot gas bypass can be introduced at the distributor to the evaporator, increasing the volume of gasavailable in the suction line to entrain the oil.

An oil separator may be installed in the discharge line.

With reciprocating compressor units only, and only as a last resort, double suction risers can beutilized. Since a double suction riser works by providing an oil trap to assure the return of some oil,with refrigerant, up the smaller diameter line,

a) the trap must be as small as possible

b) there must not be multiple traps, and

c) whenever double risers are used in a suction line, a suction accumulator with a controlled oilreturn must be installed in the line ahead of the compressor.

In horizontal refrigerant gas lines, oil return to compressors is assured by sizing lines at a velocityabove the minimum recommended and pitching the lines in the direction of refrigerant flow.

SIZING A DOUBLE RISERAt maximum circuit tons, the line size should be selected from the table based upon the recommendedmaximum line loss.

With the minimum tons known, a smaller line size should be selected from ASHRAE Chapter 2, Table13 or 14 capable of entraining oil at the reduced tons. The smaller sized line should be the oneinstalled to be always active.


The net internal area of this smaller sized line (see Table 13 or 14) should be deducted from the area ofthe size selected in paragraph 1) immediately above. The remainder represents the area of the otherriser. From Table 13 or 14, select a line size with an area equal, or close, to the calculated net area. Thecombination of these two risers will provide the required performance at full circuit tons. The lineselected for the minimum load should always be active; and both lines should enter the overheadhorizontal line in a manner to prevent spillage of oil back down the other riser.

LONG VERTICAL RISER INSTALLATIONWhere job conditions require refrigerant gas lifts of more than 25 feet, McQuay recommends theinstallation of a short trap half-way up the riser or at not more than 20 feet intervals. These traps arerequired to capture and hold small quantities of oil during off cycles.

Liquid LinesLiquid lines are generally sized for 1 to 2 degrees F line losses or their equivalent in pressure drop.Actual selection can vary based upon the pressure drop expected from refrigerant specialties such assolenoids, refrigerant driers, valves, etc. piping lifts or risers and the amount of condenser sub-coolingexpected.

The principal concern in sizing and routing liquid lines is assurance that liquid is present in the line atstart-up of the compressor, and that liquid, not vapor, is available at the inlet to the expansion valveduring system operation.

Liquid may not be available in a liquid line at start-up if:

• The solenoid valve is located adjacent to the condenser or condensing unit; remote from theexpansion valve.

• An excessive length of liquid line is located in a heated ambient and the application permitsmigration of the refrigerant to a cold air cooled condenser.

• Liquid refrigerant is permitted to gravitate from the liquid line to the condenser because of therelative location of components.

• Liquid line solenoid valves should be located adjacent to the expansion valve with possibly onlya sight glass interposing the two.

In the event 2) or 3) above are possible, the application should include a check valve at the condenserend of the liquid line. The check valve should be a low pressure drop valve, and since the linebetween the check valve and the solenoid valve can be comparable to a pressure vessel as the linebecomes heated, the check valve should include a pressure relief device, relieving from the line side tothe condenser side of the circuit. The relief can be sized for a pressure differential from 80 to 180 psi,but not more than 180 psi, and should be auto-resetting as the pressure is relieved.

CAUTION: The liquid line should not include a check valve unless the line also includes an automaticresetting pressure relief device.

CAUTION: If the relief device being used is relieving from the line to the condenser side of the checkvalve, the maximum desirable pressure differential with R-22 refrigerant is 180 psi, with R-134a, 100 psi.

If liquid lines are short, they may be of smaller diameter than the size indicated in the ASHRAERefrigerant Handbook, 1998 Edition, Chapter 2, Tables 3 or 4. As indicated above, the designer mustsize the liquid line to assure that pure liquid will reach the inlet of the expansion valve. If thecondenser is sized to produce 10ºF of subcooling, and each degree represents 3.05 psi with R-22 (or2.2. psi with R-134a), the liquid line and its refrigerant specialties may have pressure losses totaling 10x 3.05 psi (or 10 x 2.2) and still satisfy the objective of believing pure liquid to the expansion valve.

In calculating the pressure losses, or gains, note that each foot of rise in a liquid line results in anapproximate 0.5 psi loss. Thus a 10 foot rise represent 5 pounds per square inch loss in refrigerantpressure, or the equivalent of 1.6ºF subcooling with R-22. Total line losses will include values for line


friction, equivalents for valves and elbows and pressure losses from manufacturers’ catalogs fordriers, solenoids, sight glasses, etc.

In estimating condenser subcooling, note that saturated condensing pressure should be read, orestimated, at the same point in the system where the liquid refrigerant temperature is obtained. Thatcondensing pressure is not the discharge pressure read at the compressor outlet. Because it is less,the net value of subcooling will be lower than might otherwise be assumed.

Where rises in liquid lines result in a 0.5 PSI loss per foot of lift, a drop in the liquid line results in a risein the refrigerant pressure. A substantial drop in the liquid line can assure the existence of pure liquidat the valve. If it is a substantial increase because of a large drop, the expansion valve selection mustbe re-checked to confirm that the valve to be used is not radically oversized.

Liquid Lines from Condensers to ReceiversReceivers in a refrigerant system have both liquid and gas contained within the same vessel. In air-cooled condenser applications, the condensing temperature can change rapidly resulting in therequirement for more liquid at a lower temperature and pressure to be introduced into the receiver.

In order for this flow of lower temperature and pressure of liquid refrigerant to enter the receiver, 1) thereceiver must be located below the condenser outlet with no restrictions in the line, and 2) the liquidline connecting the condenser and the receiver must be sized for a maximum velocity of 100 fpm.Piping sizes for this are shown in the ASHRAE tables.

Note: If the interconnecting piping described above contains a Seasontrol back-flooding type headpressure control valve representing a restriction in the liquid line, a separate vent from the top of thereceiver to the discharge line entering the condenser is required.

Liquid Line ComponentsTo assist in laying out and specifying split systems, the following recommended (or equal)components can be used.

Table 21, Liquid Line Components for Dual Independent Refrigerant CircuitsSporlan Part Number Shown - (Equivalents Are Acceptable)

UnitModel

RefrigerantCircuit

Nom.R-22Tons(mbh)

FilterDrier

SolenoidValve

SightGlass

ExpansionValve

AGR 075AM #1 & #2 480 C-969 E25S290 SA-19S OVE-40

#1 490 C-969 E25S290 SA-19S OVE-40AGR 080AM

#2 589 C-1449 E25S290 SA-19S OVE-55

AGR 085AM #1 & #2 589 C-1449 E25S290 SA-19S OVE-55

#1 589 C-1449 E25S290 SA-19S OVE-55AGR 095AM

#2 689 C-1449 E25S290 SA-19S OVE-70

AGR 100AM #1 & #2 689 C-1449 E25S290 SA-19S OVE-70


Optional Features

Hot Gas BypassHot gas bypass permits unit operation down to 10% of full load capacity. This option includes a hotgas bypass valve, solenoid valve, and manual shutoff valve for each circuit.

GaugesOptional factory mounted gauges include high side and low side refrigerant gauges and oil pressuregauge for each refrigerant circuit for units with the standard UNT controller. (The data is included onthe optional MicroTech control keypad display.)

Protective Base GuardsOptional factory installed vinyl-coated welded wire base guards provide all-around lower unitprotection on ground level installations. Coil guards are standard.

High Return Water Staging ThermostatField installed high return temperature unloader thermostat senses high return water temperatures atstartup and unloads the refrigerant circuit to avoid unit shutdown due to compressor motor overload.Field location of the thermostat bulb is also required. (Function is standard on the MicroTech.)

SpeedTrol Head Pressure ControlOptional SpeedTrol head pressure control allows unit operation down to 0°F (-18°C). (Not availableon 380 volt - 60 Hertz units.) SpeedTrol includes a single-phase variable speed motor in the first fanposition for each system.

Copper Fin Condenser CoilsCopper fin condenser coils and coated coils are available as an option on all models.

Aluminum or Copper Fins with Protective CoatingCoating is Electro Fin flexible dip and bake epoxy coating providing corrosion resistance to a widerange of chemicals and salt water.

Disconnect SwitchA factory or field installed non-fused disconnect switch with standard thru-the-door handle isavailable on all units except AGR 080 and larger with 208/230 volt power.

Circuit BreakersFactory installed circuit breakers are available on unit with single or multiple point power supply. Thisoption provides unit installed compressor short circuit protection and makes servicing easier.

Multiple Point Power ConnectionsTwo separate power connections are furnished, one for each circuit's compressor and fan motors.

Phase Loss/Voltage ProtectionPhase loss with under/over voltage protection and multiple LED indication of fault type is available asa factory or field installed option to guard against compressor motor burnout.


Part Winding StartPart winding start is available as a special option on 380 – 575 volt units.

Water Flow SwitchA water flow switch is available for field installation in the chilled water piping to prevent evaporatorfreeze-up under low or no flow conditions. Terminals are provided in the unit control center for fieldhook-up of the water flow safety switch. If this option is not ordered with the unit, then a fieldsupplied water flow switch is required.

Vibration IsolatorsSpring vibration isolators are available for field installation to reduce vibration transmission throughthe unit base.

Zone Terminal DisplayFor use with the standard Global UNT controller. Can be field mounted on unit or remotely. See page7 for details. (Not required on MicroTech option.)

MicroTechThe control panel contains a Model 250-6 microprocessor based controller. The operator can reviewand change operating parameters from the interface keypad. The interface keypad has twelve inputkeys and a two line by sixteen character display. The system is protected by a simple passwordscheme allowing access to authorized personnel. A valid password must be entered before any setpoints can be changed.

MicroTech continuously performs self-diagnostic checks and will automatically shutdown acompressor, a refrigerant circuit, or the entire unit should a fault occur. The cause of the shutdownwill be retained in memory and can easily be displayed for operator review. The MicroTech controllerwill also retain and display the time the fault occurred and the operating conditions that were presentat the time of the fault. In addition to alarm diagnostics, the controller also provides the operator witha warning of pre-alarm conditions.

Remote MonitoringMicroTech Monitor software may be used on the customers personal computer to communicate withthe MicroTech controller. The controller connects directly or remotely over phone lines with anoptional modem.

Thermal StorageSelect the MicroTech and double chiller insulation options for ice storage applications. A fieldsupplied changeover signal will determine whether the chiller operates in normal or ice mode.

Double Chiller Barrel InsulationFactory installed double insulation (1 ½ inch total) on evaporator barrel.

115 Volt Convenience Outlet

Hail/Wind GuardField installed sheet metal guards to protect the unit coils from hail damage and to provide more stableoperation at low ambient temperatures by decreasing discharge pressure instability from wind.


Product Specification, AGR-AS

SECTION 15XXX

AIR-COOLED RECIPROCATING COMPRESSOR CHILLERSAGR 070AS - AGR 100AS

PART 1 - GENERAL

1.01 SUMMARY

Section includes design, performance criteria, refrigerants, controls, and installationrequirements for air-cooled reciprocating compressor chillers.

1.02 REFERENCES

Comply with applicable Standards/Codes of ARI 550/590-98, ANSI/ASHRAE 15, ETL, cETL,

ASME Section VIII, NEC, ASHRAE Standard 90.1, and OSHA as adopted by the State.

1.03 SUBMITTALS

A. Submit shop drawings and product data in accordance with the specifications.

B. Submittals shall include the following:

1. Dimensioned plan and elevation view drawings, required clearances, and

location of all field connections.

2. Summary of all auxiliary utility requirements such as: electricity, water,

compressed air, etc. Summary shall indicate quality and quantity of each

required utility.

3. Single line schematic drawing of the power field hookup requirements,

indicating all items which are furnished.

4. Schematic diagram of control system indicating points for field

interface/connection.

5. Diagram shall fully delineate field and factory wiring.

6. Installation manuals.

1.04 QUALITY ASSURANCE

A. Qualifications: Equipment manufacturer must specialize in the manufacture of the

products specified and have five years experience with the equipment and

refrigerant offered.

B. Regulatory Requirements: Comp ly with the codes and standards specified.

C Chiller manufacturer plant must be ISO9002 Registered.

1.05 DELIVERY AND HANDLING


A. Chillers shall be delivered to the job site completely assembled and charged with

refrigerant and oil by the manufacturer.

B. Comply with the manufacturers instructions for rigging and handling equipment.

1.06. WARRANTYThe refrigeration equipment manufacturer’s warranty shall be for a period of one year from

date of equipment start-up but not more than 18 months from shipment. The warranty shall

cover material and workmanship that prove defective within the above period, excluding

refrigerant.

1.07 MAINTENANCEMaintenance of the chillers shall be the responsibility of the owner and performed in

accordance with the manufacturer’s instructions.

PART 2--PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS

A. McQuay International

B. (Approved Equal)

2.02 UNIT DESCRIPTION

Provide and install as shown on the plans factory assembled, factory charged, and factory

run tested air-cooled reciprocating compressor packaged chillers in the quantity specified.

Each chiller shall consist of reciprocating semi-hermetic compressors, multi-circuit direct

expansion evaporator, air-cooled condenser section, control system and all components

necessary for safe and controlled unit operation.

2.03 DESIGN REQUIREMENTS

A. General: Provide a complete reciprocating compressor packaged chiller as specified

herein and as shown on the drawings. The unit shall be in accordance with the

standards referenced in section 1.02 and any local codes in effect.

B. Performance: Refer to the schedule of performance on the drawings. The chiller

shall be capable of stable operation to a minimum of 30 percent of full load without

hot gas bypass. Performance shall be in accordance with ARI Standard 550/590.

C. Acoustics: Sound pressure levels for the unit shall not exceed the following

specified levels. The manufacturer shall provide the necessary sound treatment to

meet these levels if required. Sound data shall be provided with the quotation and

be measured at 30 feet from the unit and one meter above the unit base line

Octave Band63 125 250 500 1000 2000 4000 8000 dBA

_____ ____ ____ ____ ____ ____ ____ ____ ____


2.04 CHILLER COMPONENTS

A. Structure: The chiller shall have a heavy-duty fully painted formed steel, full length

and width base. The base, condenser support legs and all other sheet metal

components shall be galvanized, phosphorized, and painted. Coils shall be

protected with wire grilles or louvers. Adequate space shall be provided to service

or remove all components.

B. Compressors: The compressors shall be accessible hermetic reciprocating type with

suction and discharge service valves, crankcase oil heater and suction strainer.

Compressors shall have a forced feed lubrication system with a reversible oil pump

and initial oil charge. The compressor motor shall be refrigerant gas cooled, high

torque, hermetic induction type, four-pole, with inherent thermal protection on all

three phases and shall be mounted on RIS vibration isolator pads.

C. Evaporator: The evaporator shall be direct expansion, shell and tube with carbon

steel shell and high efficiency copper tubes rolled into steel tube sheets. Internal

baffles shall be polypropylene. The refrigerant heads shall have multi-pass baffles

to insure oil return and be removable to permit access to the tubes from either end.

The shall be insulated with 3/4 inch (19mm) closed cell polymer insulation with a

minimum K factor of 0.28 at 75°F (23°C) and be heated with an electric heater to

provide freeze protection to -20°F (-29°C) ambient temperature. The refrigerant side

working pressure shall be at least 225 psig (1552 kPa). The water side working

pressure shall be at least 175 psig (1207 kPa). The evaporator must be designed,

constructed, inspected, and stamped according to the ASME Code.

D. Condenser: The condenser coils shall consist of 3/8 inch (10mm) seamless copper

tubes mechanically bonded into rippled plate type fins. The fins shall have full

drawn collars to completely cover the tubes. A subcooling coil shall be an integral

part of the main condenser coil. Condenser fans shall be propeller type arranged for

vertical air discharge and individually driven by direct drive fan motors. Each fan

shall be in its own compartment to eliminate cross flow of condenser air during fan

cycling and shall be equipped with a heavy-gauge vinyl coated fan guard. Fan

motors shall be weather protected, three-phase, direct-drive, 1140 rpm, open drip-

proof type. Speed controlled fan motors shall be single-phase.

E. Refrigerant Circuit: The refrigerant circuit shall include a liquid line shutoff valve,

refrigerant filter-drier, sight glass with moisture indicator, liquid line solenoid valve

(no exceptions), thermal expansion valve, and insulated suction line.


F. Control System: A centrally located weatherproof control panel shall contain the

field power connection points, control interlock terminals, and control system.

Power and starting components shall include factory fusing of fan motors and

control circuit; control transformers, individual contactors for each fan motor, solid-

state start timer, solid-state three-phase motor overload protection, inherent fan

motor overload protection and unit power terminal blocks for connection to remote

disconnect switch. Terminals shall also be provided for power supply to the

evaporator heater circuit. Hinged access doors shall be lockable. Barrier panels are

required to protect against accidental contact with line voltage when accessing the

control system. The operating and safety controls shall be:

Global UNT microprocessor based control that accomplishes unit capacity control

by 6-stage cross-circuit compressor cycling based on leaving chilled water

temperature. Set point and control band shall easily field adjusted and anti-cycling

and stage delay relays are to be included. Safety controls shall include low and

high refrigerant pressure safeties, low evaporator flow, sensor failures, and

evaporator freeze protection. Motor protection shall include phase voltage, volts

ratio, and solid state compressor motor protection. The controller shall be equipped

with a Zone Terminal option that provides an onboard LCD display of unit operating

parameters and adjustment of any optional controls.

- OR -

MicroTech microprocessor control with a 12 key keypad and 4-line, 40 character

backlit liquid crystal display operator interface. The controller shall continuously

perform self-diagnostic checks on all system temperatures, pressures, and safeties,

and automatically shut down a circuit or the entire unit at fault conditions. The

cause, time, and date of the occurrence shall be recorded and displayed along with

availability to view the seven previous incidents.

The controller shall take proactive measures to stay on-line for non-critical

abnormalities; staging down capacity, activating a pre-alarm signal and

automatically switching to the alarm menu on the display. These pre-alarms shall be

self-clearing when the off-condition is corrected.

Critical shutdown alarms such as high condenser pressure, freeze protection, and

low evaporator pressure shall be manual reset and cleared at the keypad to resume

operation.

The refrigerant discharge pressure shall be controlled by a FanTrol system that

cycles condenser fans based on discharge pressure and shall be operational 40°F

(4.4°C).

- OR -


The refrigerant discharge pressure shall be controlled by a SpeedTrol control

employing both fan cycling and fan speed control and allow operation to

0°F (-18°C).

2.05 OPTIONS AND ACCESSORIES

The following options are to be included:

• Hot gas bypass on all circuits

• Low ambient, variable speed, head pressure control to 0°F (-17.8°C)

• Copper fin condenser coils

• Wire mesh base guards.

• Chilled water flow switch to be field mounted in the chilled water line and field wired to

terminals in the control panel

• Spring vibration isolators for field installation

• Factory mounted refrigerant pressure gauges for each circuit

• High return water staging thermostat to prevent compressor overload due to warm water

starts

• Nonfused disconnect switch with thru-the-door handle

• Factory installed circuit breaker to provide unit short circuit protection

• Phase loss with under/over voltage protection and with LED indication of the fault type

• 115 volt convenience outlet

• Field installed wind/hail guards

• Double evaporator barrel insulation

PART 3 - EXECUTION

3.01 INSTALLATION

A. Install in strict accordance with manufacturer’s requirements, shop drawings, and

contract documents.

B. Adjust and level chiller in alignment on supports.

C. Coordinate electrical installation with electrical contractor.

D Coordinate controls with control contractor.

E. Provide all appurtenances required to ensure a fully operational and functional

chiller.

3.02 START-UP

A. Ensure proper charge of refrigerant and oil.

B. Provide testing, and starting of machine, and instruct the Owner in its proper

operation and maintenance.


Product Specification, AGR-AM

SECTION 15XXXAIR-COOLED RECIPROCATING CHILLERS

WITH REMOTE EVAPORATORSAGR 070AM - AGR 100AM

PART 1 - GENERAL

1.01 SUMMARY

Section includes design, performance criteria, refrigerants, controls, and installationrequirements for air-cooled reciprocating compressor chillers.

1.02 REFERENCES

Comply with applicable Standards/Codes of ANSI/ASHRAE 15, ETL, cETL, ASME Section

VIII, NEC, ASHRAE Standard 90.1, and OSHA as adopted by the State.

1.03 SUBMITTALS

A. Submit shop drawings and product data in accordance with the specifications.

B. Submittals shall include the following:

1. Dimensioned plan and elevation view drawings, required clearances, and

location of all field connections.

2. Summary of all auxiliary utility requirements such as: electricity, water,

compressed air, etc. Summary shall indicate quality and quantity of each

required utility.

3. Single line schematic drawing of the power field hookup requirements,

indicating all items which are furnished.

4. Schematic diagram of control system indicating points for field

interface/connection.

5. Diagram shall fully delineate field and factory wiring.

6. Installation manuals.

1.04 QUALITY ASSURANCE

A. Qualifications: Equipment manufacturer must specialize in the manufacture of the

products specified and have five years experience with the equipment and

refrigerant offered.

B. Regulatory Requirements: Comply with the codes and standards specified.

C Chiller manufacturer plant must be ISO9002 Registered.


1.05 DELIVERY AND HANDLING

A. Chillers shall be delivered to the job site as two components, an outdoor section

with compressors, condenser, and controls plus a shell-and-tube evaporator for

remote mounting.

B. Comply with the manufacturers instructions for rigging and handling equipment.

1.06. WARRANTYThe refrigeration equipment manufacturer’s warranty shall be for a period of one year from

date of equipment start-up but not more than 18 months from shipment. The warranty shall

cover material and workmanship that prove defective within the above period, excluding

refrigerant.

1.07 MAINTENANCEMaintenance of the chillers shall be the responsibility of the owner and performed in

accordance with the manufacturer’s instructions.

PART 2--PRODUCTS

2.01 ACCEPTABLE MANUFACTURERS

A. McQuay International

B. (Approved Equal)

2.02 UNIT DESCRIPTION

Provide and install as shown on the plans factory assembled, and factory run tested, air-

cooled reciprocating compressor condensing units, remote shell-and-tube heat exchanger,

interconnecting refrigerant piping, control system and all components necessary for safe and

controlled unit operation.

2.03 DESIGN REQUIREMENTS

A. General: Provide a complete air-cooled reciprocating compressor chiller with remote

heat exchanger as specified herein and as shown on the drawings. The unit shall be

in accordance with the standards referenced in section 1.02 and any local codes in

effect.

B. Performance: Refer to the schedule of performance on the drawings. The chiller

shall be capable of stable operation to a minimum of 30 percent of full load without

hot gas bypass. Performance shall be in accordance with Standard 550/590.

C. Acoustics: Sound pressure levels for the unit shall not exceed the following

specified levels. The manufacturer shall provide the necessary sound treatment to

meet these levels if required. Sound data shall be provided with the quotation and

be measured at 30 feet from the unit and one meter above the unit base line.

Octave Band63 125 250 500 1000 2000 4000 8000 dBA

____ ____ _____ _____ _____ ____ ____ ____ ____


2.04 CHILLER COMPONENTS

A. Structure: The outdoor section shall have a heavy-duty fully painted, formed steel,

full length and width base. The base, condenser support legs and all other sheet

metal components shall be galvanized, phosphorized, and painted. Coils shall be

protected with wire grilles or louvers. Adequate space shall be provided to service

or remove all components.

B. Compressors: The compressors shall be accessible hermetic reciprocating type with

suction and discharge service valves, crankcase oil heater and suction strainer.

Compressors shall have a forced feed lubrication system with a reversible oil pump

and initial oil charge. The compressor motor shall be refrigerant gas cooled, high

torque, hermetic induction type, four-pole, with inherent thermal protection on all

three phases and shall be mounted on RIS vibration isolator pads.

C. Remote Evaporator: The evaporator shall be direct expansion, shell and tube with

carbon steel shell and high efficiency copper tubes rolled into steel tube sheets.

Internal baffles shall be polypropylene. The refrigerant heads shall have multi-pass

baffles to insure oil return and be removable to permit access to the tubes from

either end. The shall be insulated with 3/4 inch (19mm) closed cell polymer

insulation with a minimum K factor of 0.28 at 75°F (23°C) and be heated with an

electric heater to provide freeze protection to -20°F (-29°C) ambient temperature.

The refrigerant side working pressure shall be at least 225 psig (1552 kPa). The

water side working pressure shall be at least 175 psig (1207 kPa). The evaporator

must be designed, constructed, inspected, and stamped according to the ASME

Code.

D. Condenser: The condenser coils shall consist of 3/8 inch (10mm) seamless copper

tubes mechanically bonded into rippled plate type fins. The fins shall have full

drawn collars to completely cover the tubes. A subcooling coil shall be an integral

part of the main condenser coil. Condenser fans shall be propeller type arranged for

vertical air discharge and individually driven by direct drive fan motors. Each fan

shall be in its own compartment to eliminate cross flow of condenser air during fan

cycling and shall be equipped with a heavy-gauge vinyl coated fan guard. Fan

motors shall be weather protected, three-phase, direct-drive, 1140 rpm, open drip-

proof type. Speed controlled fan motors shall be single-phase, direct drive, 1140

rpm.

E. Refrigerant Circuit: The outdoor unit shall be factory equipped with suction and

liquid shutoff valves, relief valves charging valves and discharge mufflers. The

interconnecting refrigerant circuit shall be furnished and installed by the contractor

and include a refrigerant filter-drier, sight glass with moisture indicator, liquid line

solenoid valve (no exceptions), thermal expansion valve, and insulated suction line.


F. Control System: A centrally located weatherproof control panel shall contain the

field power connection points, control interlock terminals, and control system.

Power and starting components shall include factory fusing of fan motors and

control circuit; control transformer, individual contactors for each fan motor, solid-

state start timer, solid-state three-phase motor overload protection, inherent fan

motor overload protection and unit power terminal blocks for connection to remote

disconnect switch. Terminals shall also be provided for power supply to the

evaporator heater circuit. Hinged access doors shall be lockable. Barrier panels are

required to protect against accidental contact with line voltage when accessing the

control system. The operating and safety controls shall be:

Global UNT microprocessor based control that accomplishes unit capacity control

by 6-stage cross-circuit compressor cycling based on leaving chilled water

temperature. The sensor shall be field wired and mounted in thermowells factory

installed in the evaporator water nozzles. Set point and control band shall easily

field adjusted and anti-cycling and stage delay relays are to be included. Safety

controls shall include low and high refrigerant pressure safeties, low evaporator

flow, sensor failures, and evaporator freeze protection. Motor protection shall

include phase voltage, volts ratio, and solid state compressor motor protection. The

controller shall be equipped with a Zone Terminal option that provides an onboard

LCD display of unit operating parameters and adjustment of any optional controls.

- OR -

MicroTech microprocessor control with a 12 key keypad and 4-line, 40 character

backlit liquid crystal display operator interface. The controller shall continuously

perform self-diagnostic checks on all system temperatures, pressures, and safeties,

and automatically shut down a circuit or the entire unit at fault conditions. The

cause, time, and date of the occurrence shall be recorded and displayed along with

availability to view the seven previous incidents.

The controller shall take proactive measures to stay on-line for non-critical

abnormalities; staging down capacity, activating a pre-alarm signal and

automatically switching to the alarm menu on the display. These pre-alarms shall be

self-clearing when the off-condition is corrected.

Critical shutdown alarms such as high condenser pressure, freeze protection, and

low evaporator pressure shall be manual reset and cleared at the keypad to resume

operation.

The refrigerant discharge pressure shall be controlled by a FanTrol system cycling

condenser fans based on discharge pressure and shall be operational 40°F (4.4°C).

- OR -


The refrigerant discharge pressure shall be controlled by a SpeedTrol control

employing both fan cycling and fan speed control and allow operation to

0°F (-18°C).

2.05 OPTIONS AND ACCESSORIES

The following options are to be included:

• Hot gas bypass on all circuits

• Low ambient, variable speed, head pressure control to 0°F (-17.8°C)

• Copper fin condenser coils

• Wire mesh base guards.

• Chilled water flow switch to be field mounted in the chilled water line and field wired to

terminals in the control panel

• Spring vibration isolators for field installation

• Factory mounted refrigerant pressure gauges for each circuit

• High return water staging thermostat to prevent compressor overload due to warm water

starts

• Nonfused disconnect switch with thru-the-door handle

• Factory installed circuit breaker to provide unit short circuit protection

• Phase loss with under/over voltage protection and with LED indication of the fault type

• 115 volt convenience outlet

• Field installed wind/hail guards

• Double evaporator barrel insulation

PART 3 - EXECUTION

3.01 INSTALLATION

A. Install in strict accordance with manufacturer’s requirements, shop drawings, and

contract documents.

B. Adjust and level chiller outdoor and indoor sections on supports.

C. Coordinate electrical installation with electrical contractor.

D Coordinate controls with control contractor.

E. Provide all appurtenances required to ensure a fully operational and functional

chiller system.

3.02 START-UP

A. Leak test, evacuate and charge system with proper charge of refrigerant and oil.

B. Provide testing, and starting of machine, and instruct the Owner in its proper

operation and maintenance.

Post Office Box 2510, Staunton, Virginia 24402-2510 USA (800) 432-1342 www.mcquay.com

air-cooled reciprocating chiller - daikin applied

Documents