14 seer single--packaged heat pump system with r--410a ...specifications are subject to change...

518 01 2004 01 03/2015Specifications are subject to change without notice.

INSTALLATION INSTRUCTIONS14 SEER Single--Packaged Heat Pump System

with R--410A RefrigerantSingle and Three Phase 2--5 Nominal Tons (24--60)

PHD4 and WPH4

IMPORTANT: Effective January 1, 2015, all split system andpackaged air conditioners must be installed pursuant to applicableregional efficiency standards issued by the Department of Energy.

NOTE: Read the entire instruction manual before starting theinstallation.

NOTE: Installer: Make sure the Owner’s Manual and ServiceInstructions are left with the unit after installation.

TABLE OF CONTENTSPAGE

SAFETY CONSIDERATIONS 1. . . . . . . . . . . . . . . . . . . . . . . . .INTRODUCTION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .RECEIVING AND INSTALLATION 2--11. . . . . . . . . . . . . . . . .Check Equipment 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Identify Unit 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Inspect Shipment 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Provide Unit Support 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Roof Curb 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Slab Mount 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Provide Clearances 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rig and Place Unit 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Inspection 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rigging/Lifting of Unit 8. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Select and Install Ductwork 9. . . . . . . . . . . . . . . . . . . . . . . . . . .Configuring Units to Downflow (Vertical) Discharge 9. . . . .

Provide for Condensate Disposal 10. . . . . . . . . . . . . . . . . . . . .Install Electrical Connections 10. . . . . . . . . . . . . . . . . . . . . . . .High--Voltage Connections 10. . . . . . . . . . . . . . . . . . . . . . . .Special Procedures for 208--V Operation 11. . . . . . . . . . . . . .Control Voltage Connections 11. . . . . . . . . . . . . . . . . . . . . . .Standard Connections 11. . . . . . . . . . . . . . . . . . . . . . . . . . . .Transformer Protection 11. . . . . . . . . . . . . . . . . . . . . . . . . . .Accessory Electric Heaters Installation 11. . . . . . . . . . . . . . .Sequence of Operation 11. . . . . . . . . . . . . . . . . . . . . . . . . . .

PRE--START--UP 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .START--UP 19--22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Checking Cooling & Heating Control Operation 19. . . . . . . .Check for Refrigerant Leaks 19. . . . . . . . . . . . . . . . . . . . . . . . .Start--Up Adjustments 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Checking & Adjusting Refrigerant Charge 20. . . . . . . . . . . .Indoor Airflow & Airflow Adjustments 20. . . . . . . . . . . . . .Continuous Fan Operation 21. . . . . . . . . . . . . . . . . . . . . . . .

Defrost Control 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Quiet Shift 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Defrost 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MAINTENANCE 29--34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Air Filter 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Indoor Blower and Motor 29. . . . . . . . . . . . . . . . . . . . . . . . . . .Outdoor Coil, Indoor Coil, & Condensate Drain Pan 32. . . . . .Outdoor Fan 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electrical Controls and Wiring 32. . . . . . . . . . . . . . . . . . . . . . .Refrigerant Circuit 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Indoor Airflow 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Metering Devices-- TXV & Piston 32. . . . . . . . . . . . . . . . . . . .Pressure Switches 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Loss of Charge Switch 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A09034

Fig. 1 -- Unit PHD4 (Some units may vary in appearance)

High Pressure Switch 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Copeland Scroll compressor (R--410A Refrigerant) 33. . . . . . .Refrigerant System 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Refrigerant 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Compressor Oil 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Servicing Systems on Roofs with Synthetic Materials 33. . . .Liquid Line Filter Drier 33. . . . . . . . . . . . . . . . . . . . . . . . . . .R--410A Refrigerant Charging 33. . . . . . . . . . . . . . . . . . . . . .

System Information 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Loss of Charge Switch 34. . . . . . . . . . . . . . . . . . . . . . . . . . . .Check Defrost Thermostat 34. . . . . . . . . . . . . . . . . . . . . . . . .

TROUBLESHOOTING 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .START--UP CHECKLIST 34. . . . . . . . . . . . . . . . . . . . . . . . . . . .

SAFETY CONSIDERATIONSInstallation and servicing of this equipment can be hazardous dueto mechanical and electrical components. Only trained andqualified personnel should install, repair, or service this equipment.

Untrained personnel can perform basic maintenance functions suchas cleaning and replacing air filters. All other operations must beperformed by trained service personnel. When working on thisequipment, observe precautions in the literature, on tags, and onlabels attached to or shipped with the unit and other safetyprecautions that may apply.

Follow all safety codes. Wear safety glasses, protective clothing,and work gloves. Use quenching cloth for brazing operations.Have a fire extinguisher available. Read these instructionsthoroughly and follow all warnings or cautions included in

2 518 01 2004 01Specifications are subject to change without notice.

literature and attached to the unit. Consult local building codes, thecurrent editions of the National Electrical Code (NEC) NFPA 70.

In Canada refer to the current editions of the Canadian ElectricalCode CSA C22.1.

Recognize safety information. This is the safety--alert symbol .When you see this symbol on the unit and in instructions or manu-als, be alert to the potential for personal injury. Understand thesesignal words: DANGER, WARNING, and CAUTION. Thesewords are used with the safety--alert symbol. DANGER identifiesthe most serious hazards which will result in severe personal injuryor death. WARNING signifies hazards which could result in per-sonal injury or death. CAUTION is used to identify unsafe practic-es which may result in minor personal injury or product and prop-erty damage. NOTE is used to highlight suggestions which willresult in enhanced installation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personalinjury or death.

Before installing or servicing system, always turn off mainpower to system and install lockout tag. There may bemore than one disconnect switch. Turn off accessory heaterpower switch if applicable.

! WARNING

CUT HAZARD

Failure to follow this caution may result in personal injury.

When removing access panels (see Fig. 23) or performingmaintenance functions inside your unit, be aware of sharpsheet metal parts and screws. Although special care is takento reduce sharp edges to a minimum, be extremely carefuland wear appropriate clothing, safety glasses and gloveswhen handling parts or reaching into the unit.

! CAUTION

INTRODUCTIONThis heat pump is fully self--contained and designed for outdoorinstallation. (See Fig. 1) Standard units are shipped in ahorizontal--discharge configuration for installation on a groundlevel slab. Standard units can be converted to downflow (vertical)discharge configurations for rooftop applications.

RECEIVING AND INSTALLATIONStep 1 — Check EquipmentIdentify UnitThe unit model number and serial number are stamped on the unitidentification plate. Check this information against shippingpapers.

Inspect ShipmentInspect for shipping damage before removing packaging material.If unit appears to be damaged or is torn loose from its anchorage,have it examined by transportation inspectors before removal.Forward claim papers directly to transportation company.Manufacturer is not responsible for any damage incurred in transit.Check all items against shipping list. Immediately notify thenearest equipment distributor if any item is missing. To preventloss or damage, leave all parts in original packages untilinstallation.

If the unit is to be mounted on a curb in a downflow application,review Step 5 to determine which method is to be used to remove

the downflow panels before rigging and lifting into place. Thepanel removal process may require the unit to be on the ground.

Step 2 — Provide Unit SupportRoof CurbInstall accessory roof curb in accordance with instructions shippedwith curb (See Fig. 6). Install insulation, cant strips, roofing, andflashing. Ductwork must be attached to curb.

IMPORTANT: The gasketing of the unit to the roof curb is criticalfor a watertight seal. Install gasketing material supplied with theroof curb. Improperly applied gasketing also can result in air leaksand poor unit performance.

Curb should be level to within 1/4 in. (6 mm) (See Fig. 9). This isnecessary for unit drain to function properly. Refer to accessoryroof curb installation instructions for additional information asrequired.

Installation on older “G” series roof curbs.

Two accessory kits are available to aid in installing a new “G”series unit on an old “G” roof curb.

1. Accessory kit number CPADCURB001A00, (small chassis)and accessory kit number CPADCURB002A00, (largechassis) includes roof curb adapter and gaskets for theperimeter seal and duct openings. No additionalmodifications to the curb are required when using this kit.

2. An alternative to the adapter curb is to modify the existingcurb by removing the outer horizontal flange and useaccessory kit number CPGSKTKIT001A00 which includesspacer blocks (for easy alignment to existing curb) andgaskets for the perimeter seal and duct openings. This kit isused when existing curb is modified by removing outerhorizontal flange.

UNIT/STRUCTURAL DAMAGE HAZARD

Failure to follow this caution may result in propertydamage.

Ensure there is sufficient clearance for saw blade whencutting the outer horizontal flange of the roof curb so thereis no damage to the roof or flashing.

! CAUTION

Slab MountPlace the unit on a solid, level pad that is at least 2 in. (51 mm)above grade (See Fig. 10). The pad should extend approximately 2in. (51 mm) beyond the casing on all 4 sides of the unit. Do notsecure the unit to the pad except when required by local codes.

Step 3 — Provide ClearancesThe required minimum service clearances are shown in Fig. 2 and5. Adequate ventilation and outdoor air must be provided. Theoutdoor fan draws air through the outdoor coil and discharges itthrough the top fan grille. Be sure that the fan discharge does notrecirculate to the outdoor coil. Do not locate the unit in either acorner or under an overhead obstruction. The minimum clearanceunder a partial overhang (such as a normal house overhang) is 48in. (1219 mm) above the unit top. The maximum horizontalextension of a partial overhang must not exceed 48 in. (1219 mm).

IMPORTANT: Do not restrict outdoor airflow. An air restrictionat either the outdoor--air inlet or the fan discharge may bedetrimental to compressor life.

Do not place the unit where water, ice, or snow from an overhangor roof will damage or flood the unit. Do not install the unit oncarpeting or other combustible materials. Slab--mounted unitsshould be at least 2 in. (51 mm) above the highest expected waterand runoff levels. Do not use unit if it has been under water.

PHD4,WPH4


PH

D42

4P

HD

430

PH

D42

4P

HD

430

Fig. 2 -- PHD4 24--30 Unit Dimensions

A14491

PHD4,WPH4


Fig. 3 -- WPH4 24--30 Unit Dimensions

A14389

PHD4,WPH4


PH

D43

6

PH

D44

2

PH

D44

8

PH

D46

0

PH

D43

6

PH

D44

2

PH

D44

8

PH

D46

0

A14492

Fig. 4 -- PHD4 36--60 Unit Dimensions

PHD4,WPH4


A14390

Fig. 5 -- WPH4 36--60 Unit Dimensions

PHD4,WPH4


RETURN AIR

SMALLBASE UNIT

SUPPLYAIR

LARGEBASE UNIT

UNIT PLACEMENT ON COMMON CURB

LARGE CURB SMALL OR LARGE BASE UNIT

SMALL/COMMON CURB

ROOF CURB DETAIL

Wood nailer*

Roofcurb*

Insulation(field supplied)

*Provided with roofcurb

Cant stripfield supplied

Roofing materialfield supplied

Flashing fieldsupplied

HVAC unitbase rails

Roofcurb

SealingGasket

HVAC unitbasepan

Anchor screw

A09090

A09413

A09094

A09415

C

B

AF

DE

Dashed lines show cross supportlocation for large basepan units.

G

H

C

B

AF

D

E

G

H

A09414

Fig. 6 -- Roof Curb Dimensions

UNITSIZE

CATALOGNUMBER

AIN.(mm)

B (small/commonbase)

IN. (mm)*

B (large base)IN. (mm)*

CIN.(mm)

DIN. (mm)

EIN. (mm)

FIN.(mm)

GIN. (mm)

HIN. (mm)

Smallor

Large

CPRFCURB010A00 11 (279)10 (254)

14 (356) 16 (406) 47.8 (1214)32.4 (822)

2.7 (69)30.6 (778)

46.1 (1170)CPRFCURB011A00 14 (356)

LargeCPRFCURB012A00 11 (279)

14 (356) 43.9 (1116) 42.2 (1072)CPRFCURB013A00 14 (356)

* Part Numbers CPRCURB010A00 and CPRCURB011A00 can be used on both small and large basepan units. The cross supports must be located based onwhether the unit is a small basepan or a large basepan.NOTES:1. Roof curb must be set up for unit being installed.2. Seal strip must be applied, as required, to unit being installed.3. Roof curb is made of 16---gauge steel.4. Attach ductwork to curb (flanges of duct rest on curb).5. Insulated panels: 1---in. (25 mm) thick fiberglass 1 lb. density.

PHD4,WPH4


ACCESS PANELS MUST BE IN PLACE WHEN RIGGING.PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION.

50CY502286 2.0

CAUTION - NOTICE TO RIGGERSPRUDENCE - AVIS AUX MANIPULATEUR

Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition

SEAL STRIP MUST BE INPLACE BEFORE PLACINGUNIT ON ROOF CURB

DUCTS

DETAIL AVOIR DÉTAIL A

MINIMUM HEIGHT: 36" (914.4 mm)HAUTEUR MINIMUM

UNIT HEIGHTHAUTEUR D'UNITÉ

SEE DETAIL AVOIR DÉTAIL A

BANDE SCELLANT DOIT ÊTRE EN PLACE AVANT DE PLACER L'UNITÉ SUR LA BASE DE TOIT

A09051

RIGGING WEIGHTS (SMALL CABINET) RIGGING WEIGHTS (LARGE CABINET)

Unit24 30

Unit36* 42* 48* 60*

lb kg lb kg lb kg lb kg lb kg lb kgRiggingWeight 354 161 346 157 Rigging

Weight 426 193 472 214 460 209 506 230

* For 460 volt units, add 14 lb (6.4 kg) to the weight.NOTE: See dimensional drawing for corner weight distribution.

Fig. 7 -- Rigging Weights

Step 4 — Rig and Place UnitRigging and handling of this equipment can be hazardous formany reasons due to the installation location (roofs, elevatedstructures, etc.).

Only trained, qualified crane operators and ground support staffshould handle and install this equipment.

When working with this equipment, observe precautions in theliterature, on tags, stickers, and labels attached to the equipment,and any other safety precautions that might apply.

Training for operators of the lifting equipment should include, butnot be limited to, the following:

1. Application of the lifter to the load, and adjustment of thelifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.

3. Condition of the load as it relates to operation of the liftingkit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and workgloves.

InspectionPrior to initial use, and at monthly intervals, all rigging shackles,clevis pins, and straps should be visually inspected for any damage,evidence of wear, structural deformation, or cracks. Particularattention should be paid to excessive wear at hoist hooking pointsand load support areas. Materials showing any kind of wear inthese areas must not be used and should be discarded.

UNIT FALLING HAZARD


Never stand beneath rigged units or lift over people.

! WARNING

1. Leave top shipping skid on the unit for use as a spreader barto prevent the rigging straps from damaging the unit. If theskid is not available, use a spreader bar of sufficient lengthto protect the unit from damage.

PROPERTY DAMAGE HAZARD

Failure to follow this warning could result in personal injuryor death.

When straps are taut, the clevis should be a minimum of 36in. (914 mm) above the unit top cover.

! WARNING

Rigging/Lifting of Unit (See Fig. 7)Lifting holes are provided in base rails as shown.

1. Attach shackles, clevis pins, and straps to the base rails ofthe unit. Be sure materials are rated to hold the weight of theunit (See Fig. 7).

2. Attach a clevis of sufficient strength in the middle of thestraps. Adjust the clevis location to ensure unit is lifted levelwith the ground.

After the unit is placed on the roof curb or mounting pad, removethe top skid.

PHD4,WPH4


Step 5 — Select and Install DuctworkThe design and installation of the duct system must be inaccordance with the standards of the NFPA for installation ofnon--residence type air conditioning and ventilating systems,NFPA 90A or residence--type, NFPA 90B and/or local codes andordinances.

Select and size ductwork, supply--air registers, and return air grillesaccording to ASHRAE (American Society of Heating,Refrigeration, and Air Conditioning Engineers) recommendations.

The unit has duct flanges on the supply-- and return--air openingson the side of the unit.

PERSONAL INJURY HAZARD


For vertical supply and return units, tools or parts coulddrop into ductwork Install a 90 degree turn in the returnductwork between the unit and the conditioned space. If a90 degree elbow cannot be installed, then a grille ofsufficient strength and density should be installed toprevent objects from falling into the conditioned space.Units with electric heaters require 90 degree elbow insupply duct.

! WARNING

When designing and installing ductwork, consider the following:1. All units should have field--supplied filters or accessoryfilter rack installed in the return--air side of the unit.Recommended sizes for filters are shown in Table 1.

2. Avoid abrupt duct size increases and reductions. Abruptchange in duct size adversely affects air performance.

IMPORTANT: Use flexible connectors between ductwork andunit to prevent transmission of vibration. Use suitable gaskets toensure weather tight and airtight seal. When electric heat isinstalled, use fireproof canvas (or similar heat resistant material)connector between ductwork and unit discharge connection. Ifflexible duct is used, insert a sheet metal sleeve inside duct. Heatresistant duct connector (or sheet metal sleeve) must extend 24--in.(610 mm) from electric heater element.

3. Size ductwork for cooling air quantity (cfm). The minimumair quantity for proper electric heater operation is listed inTable 2. Heater limit switches may trip at air quantitiesbelow those recommended.

4. Seal, insulate, and weatherproof all external ductwork. Seal,insulate and cover with a vapor barrier all ductwork passingthrough conditioned spaces. Follow latest Sheet Metal andAir Conditioning Contractors National Association(SMACNA) and Air Conditioning Contractors Association(ACCA) minimum installation standards for residentialheating and air conditioning systems.

5. Secure all ducts to building structure. Flash, weatherproof,and vibration--isolate duct openings in wall or roofaccording to good construction practices.

CONFIGURING UNITS FOR DOWNFLOW(VERTICAL) DISCHARGE



Before performing service or maintenance operations on thesystem, turn off main power to unit and install lockout tag.There may be more than one disconnect switch.

! WARNING

1. Open all electrical disconnects and install lockout tag beforestarting any service work.

2. Remove horizontal (metal) ductcovers to access vertical(downflow) discharge duct knockouts in unit basepan. (SeeFig. 8.)

3. To remove downflow return and supply knockout covers,break front and right side connecting tabs with ascrewdriver and hammer. Push cover down to break rearand left side tabs.

Horizontal Duct CoversA09061

BasepanDownflow(Vertical)SupplyKnockout

BasepanDownflow (Vertical)ReturnKnockout

A09088

Fig. 8 -- Supply and Return Duct OpeningNOTE: These panels are held in place with tabs similar to anelectrical knockout. Reinstall horizontal duct covers (Fig. 8)shipped on unit from factory. Insure openings are air andwatertight.

NOTE: The design and installation of the duct system must be inaccordance with the standards of the NFPA for installation ofnonresidence--type air conditioning and ventilating systems, NFPA90A or residence--type, NFPA 90B; and/or local codes andordinances.

Adhere to the following criteria when selecting, sizing, andinstalling the duct system:

1. Units are shipped for side shot installation.

2. Select and size ductwork, supply--air registers, andreturn--air grilles according to American Society of Heating,Refrigeration and Air Conditioning Engineers (ASHRAE)recommendations.

PHD4,WPH4


3. Use flexible transition between rigid ductwork and unit toprevent transmission of vibration. The transition may bescrewed or bolted to duct flanges. Use suitable gaskets toensure weather--tight and airtight seal.

4. All units must have field--supplied filters or accessory filterrack installed in the return--air side of the unit.Recommended sizes for filters are shown in Table 1.

5. Size all ductwork for maximum required airflow (eitherheating or cooling) for unit being installed. Avoid abruptduct size increases or decreases or performance may beaffected.

6. Adequately insulate and weatherproof all ductwork locatedoutdoors. Insulate ducts passing through unconditionedspace, and use vapor barrier in accordance with latest issueof Sheet Metal and Air Conditioning Contractors NationalAssociation (SMACNA) and Air Conditioning Contractorsof America (ACCA) minimum installation standards forheating and air conditioning systems. Secure all ducts tobuilding structure.

7. Flash, weatherproof, and vibration--isolate all openings inbuilding structure in accordance with local codes and goodbuilding practices.

A

B

C

MAXIMUM ALLOWABLEDIFFERENCE in. (mm)

A-C

1/4 1/4 1/4(6.35) (6.35) (6.35)

A-B B-C

A07925

Fig. 9 -- Unit Leveling Tolerances

OPTIONALRETURN

AIROPENING

OPTIONALSUPPLY

AIROPENING

EVAP. COIL COND. COIL

2˝(50.8mm)

A07926

Fig. 10 -- Slab Mounting Detail

Step 6 — Provide for Condensate DisposalNOTE: Ensure that condensate--water disposal methods complywith local codes, restrictions, and practices.

The unit disposes of condensate through a 3/4 in. NPT femalefitting that exits on the compressor end of the unit. Condensatewater can be drained directly onto the roof in rooftop installations(where permitted) or onto a gravel apron in ground levelinstallations. Install a field--supplied condensate trap at end ofcondensate connection to ensure proper drainage. Make sure thatthe outlet of the trap is at least 1 in. (25 mm) lower than thedrain--pan condensate connection to prevent the pan fromoverflowing. Prime the trap with water. When using a gravel apron,make sure it slopes away from the unit.

If the installation requires draining the condensate water away fromthe unit, install a field--supplied 2 --in. (51mm) trap at thecondensate connection to ensure proper drainage. Condensate trapis available as an accessory or is field--supplied. Make sure that theoutlet of the trap is at least 1 in. (25 mm) lower than the unitdrain--pan condensate connection to prevent the pan fromoverflowing. Connect a drain tube using a minimum offield--supplied 3/4--in. PVC or field--supplied 3/4--in. copper pipe

at outlet end of the 2--in. (51 mm) trap. (See Fig. 11) Do notundersize the tube. Pitch the drain tube downward at a slope of atleast 1 in. (25 mm) every 10 ft (3 m) of horizontal run. Be sure tocheck the drain trough for leaks. Prime the trap at the beginning ofthe cooling season start--up.

TRAPOUTLET

1-in. (25 mm) min.

2-in. (51 mm) min.

A09052

Fig. 11 -- Condensate Trap

Step 7 — Install Electrical Connections

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the unitbeing installed.

1. Make all electrical connections in accordance with NECNFPA 70 (latest edition) and local electrical codesgoverning such wiring. In Canada, all electricalconnections must be in accordance with CSA standardC22.1 Canadian Electrical Code Part 1 and applicablelocal codes. Refer to unit wiring diagram.

2. Use only copper conductor for connections betweenfield--supplied electrical disconnect switch and unit. DONOT USE ALUMINUM WIRE.

3. Be sure that high--voltage power to unit is withinoperating voltage range indicated on unit rating plate. On3--phase units, ensure phases are balanced within 2percent. Consult local power company for correction ofimproper voltage and/or phase imbalance.

4. Do not damage internal components when drillingthrough any panel to mount electrical hardware, conduit,etc.

! CAUTION



The unit cabinet must have an uninterrupted, unbrokenelectrical ground. This ground may consist of an electricalwire connected to the unit ground screw in the controlcompartment, or conduit approved for electrical groundwheninstalled in accordance with NEC,NFPA 70 National FireProtection Association (latest edition) (in Canada, CanadianElectrical Code CSA C22.1) and local electrical codes.

! WARNING

High--Voltage ConnectionsThe unit must have a separate electrical service with afield--supplied, waterproof disconnect switch mounted at, or withinsight from the unit. Refer to the unit rating plate, NEC and localcodes for maximum fuse/circuit breaker size and minimum circuitamps (ampacity) for wire sizing.

The field--supplied disconnect may be mounted on the unit overthe high--voltage inlet hole when the standard power andlow--voltage entry points are used. See Fig. 2 and 5 for acceptablelocation. Remove high voltage knockout.

See unit wiring label (Fig. 14--16) and Fig. 12 for reference whenmaking high voltage connections. Proceed as follows to completethe high--voltage connections to the unit.

PHD4,WPH4


POWERSUPPLY

FIELD-SUPPLIEDFUSED DISCONNECT

HIGH VOLTAGEPOWER LEADS(SEE UNIT WIRINGLABEL)

EQUIP GR

CONTROL BOX

LOW-VOLTAGEPOWER LEADS(SEE UNITWIRING LABEL

)

W1

Y

G

R

C

WHT(W1)

YEL(Y)

GRN(G)

RED(R)

BRN(C)

THERMOSTAT(TYPICAL)

ORN(O)

3-PHASE SHOWN1-PHASE USES TWO POWER LEADS

W2VIO (W2)

O

SPLICE BOX

DHBLU(DH)

3-PhaseOnly

GRA(Y2)

A09071

Fig. 12 -- High-- and Control--Voltage Connections

Single phase units:

1. Run the high--voltage (L1, L2) and ground lead into thecontrol box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line sideof the contactor.

4. Connect field L1 to black wire on connection 11 of thecompressor contactor.

5. Connect field wire L2 to yellow wire on connection 23 ofthe compressor contactor.

Three--phase units:

1. Run the high--voltage (L1, L2, L3) and ground lead into thecontrol box.

2. Connect ground lead to chassis ground connection.

3. Locate the black and yellow wires connected to the line sideof the contactor.

4. Connect field L1 to black wire on connection 11 of thecompressor contactor.

5. Connect field wire L3 to yellow wire on connection 13 ofthe compressor contactor.

6. Connect field wire L2 to blue wire from compressor.

Special Procedures for 208--V Operation



Before installing or servicing system, always turn off mainpower to system. Tag the disconnect switch with a suitablewarning label. With disconnect switch open, move blackwire from transformer (3/16 in.) terminal marked 230 toterminal marked 208. This retaps transformer to primaryvoltage of 208 vac.

! WARNING

Control Voltage ConnectionsNOTE: Do not use any type of power--stealing thermostat. Unitcontrol problems may result.

Use no. 18 American Wire Gage (AWG) color--coded, insulated(35C minimum) wires to make the control voltage connectionsbetween the thermostat and the unit. If the thermostat is locatedmore than 100 ft (30.5 m) from the unit (as measured along the

control voltage wires), use no. 16 AWG color--coded, insulated(35 C minimum) wires.

Standard ConnectionsLocate the eight (nine on 3--phase) low voltage thermostat leads in24 volt splice box. See Fig. 12 for connection diagram. Run thelow--voltage leads from the thermostat, through the control wiringinlet hole grommet (Fig. 2 and 5), and into the low--voltage splicebox. Provide a drip loop before running wires through panel.Secure and strain relief all wires so that they do not interfere withoperation of unit. A gray wire is standard on 3--phase units forconnection to an economizer.

If an accessory electric heater is installed, low voltage leads fromheater must be connected to factory supplied control leads fromIndoor Fan Board P4 connector.

NOTE: If the unit 24V wires do not have a matching receptacle,cut the 24V wires from the electric heater plug, strip the ends, andwire nut together to match the schematic connections. If the electricheater 24V wires do not have a matching plug, cut the 24V wiresfrom the unit receptacle, strip the ends, and wire nut together tomatch the schematic connections.

Factory wires are provided for electric heat staging W1 and W2(W2 and W3 on IFB). If room thermostat has only one stage ofsupplemental heat, connect white and violet wires shown in Fig. 12to second stage heat field wire.

Some electric heaters have four control wires (plus common wire).Consult unit wiring diagram and electric heater wiring diagram foradditional details.

Transformer ProtectionThe transformer is of the energy--limiting type. It is set to withstanda 30--second overload or shorted secondary condition. If anoverload or short is present, correct overload condition and checkfor blown fuse on Interface Fan Board. Replace fuse as requiredwith correct size and rating.

Accessory Electric Heaters InstallationElectric heaters may be installed with the unit per instructionssupplied with electric heater package. See unit rating plate forfactory--approved electric heater kits.

Sequence of Operationa. CONTINUOUS FAN

(1.) Thermostat closes circuit R to G energizing theblower motor for continuous fan.

b. COOLING MODE(1.) If indoor temperature is above temperature set

point, thermostat closes circuits R to G, R to Y andR to O--The unit delivers cooling airflow.

c. ELECTRIC HEATING MODE(1.) Thermostat closes circuit R to W/W1, or W2 and Rto G. There are no on or off delays.

d. HEAT PUMP HEATING MODE(1.) Thermostat closes circuits R to G and R to Y. The

compressor, indoor and outdoor fans are energized.e. HEAT PUMP HEATING WITH AUXILIARYELECTRIC HEAT(1.) Thermostat closes circuits R to G, R to Y and R to

W/W1 or W2. The compressor, indoor and outdoorfans are energized, as well as the electric heatrelays.

f. DEFROST MODEThe defrost mode is automatically energized by thedefrost board during heating mode. The defrost boardenergizes “O” (reversing valve) and “W2” (electricheat). It also de--energizes the outdoor fan. When defrostis complete, unit will return to heating mode. If roomthermostat is satisfied during defrost, unit will shutdown and restart in defrost on next call for heat.

PHD4,WPH4


Table 1 – Physical Data24 30 36 42 48 60

Unit Size 2 2.5 3 3.5 4 5Shipping Weight (lb)

(kg)354161

346157

426193

472214

460209

506230

Compressor Quantity 1Type ScrollRefrigerant R-410ARefrigerant Quantity (lb)

Quantity (kg)11.15.0

10.34.7

9.94.5

11.35.1

12.55.7

15.26.9

Refrigerant Metering Device Indoor TXV, Outdoor Dual AccuratersOrifice OD (in)

(mm)0.032 (2)0.81 (2)

0.037 (2)0.94 (2)

0.038 (2)0.97 (2)

0.040 (2)1.02 (2)

0.040 (2)1.02 (2)

0.049 (2)1.24 (2)

Outdoor CoilRows...Fins/in,face area (sq. ft.)

2...2113.6

2...2113.6

2...2113.6

2...2117.5

2...2117.5

2...2123.3

Outdoor FanNominal Airflow (cfm)Diameter (in.)Diameter (mm)Motor hp (rpm)

250024610

1/10 (810)

270024610

1/5 (810)

310026660

1/5 (810)

310026660

1/5 (810)

310026660

1/5 (810)

350026660

1/4 (810)Indoor CoilRows...Fins/in,face area (sq. ft.)

3...173.7

3...173.7

3...174.7

3...174.7

3...175.6

3...175.6

Indoor BlowerNominal Airflow (cfm)Size (in.)Size (mm)Motor hp (rpm)

80010 x 10254 x 2541/2

100010 x 10254 x 2541/2

120011 x 10279 x 2543/4

140011 x 10279 x 2543/4

160011 x 10279 x 2541

175011 x 10279 x 2541

High Pressure Switch (psig)CutoutReset (Auto)

650 +/- 15420 +/- 25

Loss-of-Charge/Low Pressure Switch (psig)CutoutReset (Auto)

20 +/- 545 +/- 10

Return Air Filtersdisposable (in)

(mm)20x20x1508x508x25

20x24x1508x610x25

24x30x1610x762x25

24x36x1610x914x25

*Required filter sizes shown are based on the larger of the AHRI (Air Conditioning Heating and Refrigeration Institute) rated cooling airflow or the heating airflowvelocity of 300 ft/minute for throwaway type or 450 ft/minute for high---capacity type. Air filter pressure drop for non---standard filters must not exceed 0.08 IN.W.C.{ If using accessory filter rack refer to the filter rack installation instructions for correct filter size and quantity.} For 460 volt units, add 14 lb (6.4 kg) to the weight.

Table 2 – Minimum Airflow for Reliable Electric Heater Operation (CFM)

SIZE 24 30 36 42 48 60AIRFLOW (CFM) 800 1025 1250 1400 1710 1800

INDOORTHERMOSTAT

DISCONNECTPER NEC

FROMPOWERSOURCE

RETURNAIR

TOP COVER

POWER ENTRY

CONTROL ENTRY

A09098

Fig. 13 -- Typical Installation

PHD4,WPH4


A11002

Fig. 14 -- Connection Wiring Schematics 208/230--1--60

PHD4,WPH4


A11001

Fig. 12 Cont. -- Ladder Wiring Schematics 208/230--1--60

PHD4,WPH4


A11006

Fig. 15 -- Connection Wiring Schematics -- 208/230--3--60

PHD4,WPH4


A11005

Fig. 13 Cont. -- Ladder Wiring Schematics -- 208/230--3--60

PHD4,WPH4


A10195

Fig. 16 -- Connection Wiring Diagram 460--3--60

PHD4,WPH4


A10195

Fig. 14 Cont. -- Ladder Wiring Diagram 460--3--60

PHD4,WPH4


PRE--START--UP

FIRE, EXPLOSION, ELECTRICAL SHOCK ANDENVIRONMENTAL HAZARD

Failure to follow this warning could result in personal injury,death or property damage.

1. Follow recognized safety practices and wear protectivegoggles when checking or servicing refrigerant system.

2. Relieve and recover all refrigerant from system beforetouching or disturbing compressor plug if refrigerantleak is suspected around compressor terminals.

3. Do not remove compressor plug until all electricalsources are disconnected and tagged.

4. Never attempt to repair soldered connection whilerefrigerant system is under pressure.

5. Do not use torch to remove any component. Systemcontains oil and refrigerant under pressure.To remove a component, wear protective goggles andproceed as follows:

a. Shut off electrical power to unit and install lockouttag.

b. Relieve and reclaim all refrigerant from systemusing both high-- and low--pressure ports.

c. Cut component connecting tubing with tubingcutter and remove component from unit.

d. Carefully unsweat remaining tubing stubs whennecessary. Oil can ignite when exposed to torchflame.

! WARNING

Use the Start--Up Checklist supplied at the end of this book andproceed as follows to inspect and prepare the unit for initialstart--up:

1. Remove all access panels (see Fig. 23).

2. Read and follow instructions on all DANGER, WARNING,CAUTION, and INFORMATION labels attached to, orshipped with, unit.

3. Make the following inspections:

a. Inspect for shipping and handling damages such asbroken lines, loose parts, disconnected wires, etc.

b. Inspect all field and factory--wiring connections. Be surethat connections are completed and tight. Ensure wiresdo not touch refrigerant tubing or sharp sheet metaledges.

c. Inspect coil fins. If damaged during shipping andhandling, carefully straighten fins with a fin comb.

4. Verify the following conditions:

a. Make sure that outdoor--fan blade is correctly positionedin fan orifice.

b. Make sure that air filter(s) is in place.

c. Make sure that condensate drain pan and trap are filledwith water to ensure proper drainage.

d. Make sure that all tools and miscellaneous loose partshave been removed.

5. Each unit system has 2 Schrader--type ports, one low--sideSchrader fitting located on the suction line, and onehigh--side Schrader fitting located on the compressordischarge line. Be sure that caps on the ports are tight.

START--UPChecking Cooling and Heating Control OperationStart and check the unit for proper control operation as follows:

(1.) Place room thermostat SYSTEM switch or MODEcontrol in OFF position. Observe that blowermotor starts when FAN mode is placed in FAN ONposition and shuts down when FAN MODE switchis placed in AUTO position.

(2.) Thermostat:When the room temperature rises to a point that isslightly above the cooling control setting of thethermostat, the thermostat completes the circuitbetween thermostat terminal R to terminals Y, Oand G.These completed circuits through thethermostat connect contactor coil (C) (through unitwire Y) and Indoor Fan board (through unit wireG) across the 24--v. secondary of transformer(TRAN).

(3.) Place system switch or MODE control in HEATposition. Set control above room temperature.Observe that compressor, outdoor fan, and indoorblower motors start. Observe that heating cycleshuts down when control setting is satisfied.

(4.) When using an automatic changeover roomthermostat place both SYSTEM or MODE controland FAN mode switches in AUTO positions.Observe that unit operates in Cooling mode whentemperature control is set to “call for Cooling”(below room temperature), and unit operates inHeating mode when temperature control is set to“call for Heating” (above room temperature).

NOTE: Once the compressor has started and then has stopped, itshould not be started again until 5 minutes have elapsed. Thedefrost board has a built--in 5 minute delay between cycles. The 5minute compressor delay also applies to heat pump heating mode.

Step 1 — Check for Refrigerant Leaks

EXPLOSION HAZARD

Failure to follow this warning couldresult in death, serious personal injury,and/or property damage.

Never use air or gases containingoxygen for leak testing or operatingrefrigerant compressors. Pressurizedmixtures of air or gases containingoxygen can lead to an explosion.

! WARNING

Proceed as follows to locate and repair a refrigerant leak and tocharge the unit:

1. Locate leak and make sure that refrigerant system pressurehas been relieved and reclaimed from both high-- andlow--pressure ports.

2. Repair leak following Refrigerant Service procedures.

NOTE: Install a bi--flow filter drier whenever the system has beenopened for repair.

3. Add a small charge of R--410A refrigerant vapor to systemand leak--test unit.

4. Recover refrigerant from refrigerant system and evacuate to500 microns if no additional leaks are not found.

5. Charge unit with R--410A refrigerant, using an electronicscale. Refer to unit rating plate for required charge.

PHD4,WPH4


Step 2 — Start--Up AdjustmentsComplete the required procedures given in the Pre--Start--Upsection before starting the unit. Do not jumper any safety deviceswhen operating the unit. Do not operate the unit in Cooling modewhen the outdoor temperature is below 40_F (4_C) (unlessaccessory low--ambient kit is installed).

IMPORTANT: Three--phase, scroll compressors are directionoriented. Unit must be checked to ensure proper compressor3--phase power lead orientation. If not corrected within 5 minutes,the internal protector will shut off the compressor. The 3--phasepower leads to the unit must be reversed to correct rotation. Whenturning backwards, the difference between compressor suction anddischarge pressures may be near zero.

Checking and Adjusting Refrigerant ChargeThe refrigerant system is fully charged with R--410A refrigerantand is tested and factory sealed.

EXPLOSION HAZARD

Failure to follow this warning couldresult in death, serious personal injury,and/or property damage.

Never use air or gases containingoxygen for leak testing or operatingrefrigerant compressors. Pressurizedmixtures of air or gases containingoxygen can lead to an explosion.

! WARNING

NOTE: Adjustment of the refrigerant charge is not requiredunless the unit is suspected of not having the proper R--410Acharge.

A subcooling charging chart is attached to the inside of thecompressor access panel (see Fig. 23). The chart includes therequired liquid line temperature at given discharge line pressuresand outdoor ambient temperatures.

An accurate thermocouple-- or thermistor--type thermometer, and agauge manifold are required when using the subcooling chargingmethod for evaluating the unit charge. Do not use mercury or smalldial--type thermometers because they are not adequate for this typeof measurement.

NOTE: Allow system to operate for a minimum of 15 minutesbefore checking or adjusting refrigerant charge.

IMPORTANT: When evaluating the refrigerant charge, anindicated adjustment to the specified factory charge must always bevery minimal. If a substantial adjustment is indicated, an abnormalcondition exists somewhere in the cooling system, such asinsufficient airflow across either coil or both coils.

Proceed as follows:

1. Remove caps from low-- and high--pressure service fittings.

2. Using hoses with valve core depressors, attach low-- andhigh--pressure gauge hoses to low-- and high--pressureservice fittings, respectively.

3. Start unit and let run until system pressures stabilize.

4. Measure and record the following:

a. Outdoor ambient--air temperature (F [C] db).b. Liquid line temperature (F [C]) at TXV.

c. Discharge (high--side) pressure (psig).

d. Suction (low--side) pressure (psig) (for reference only).

5. Using Cooling Charging Charts compare outdoor--airtemperature (F [C] db) with the discharge line pressure(psig) to determine desired system operating liquid linetemperature (See Fig. 20).

6. Compare actual liquid line temperature with desired liquidline temperature. Using a tolerance of 2F (1.1C), addrefrigerant if actual temperature is more than 2F (1.1C)higher than proper liquid line temperature, or removerefrigerant if actual temperature is more than 2F (1.1C)lower than required liquid line temperature.

NOTE: If the problem causing the inaccurate readings is arefrigerant leak, refer to Check for Refrigerant Leaks section.

Indoor Airflow and Airflow Adjustments

UNIT OPERATION HAZARD

Failure to follow this caution may result in unit damage.

For cooling operation, the recommended airflow is 350 to450 cfm for each 12,000 Btuh of rated cooling capacity. Forheating operation, the airflow must produce a temperaturerise that falls within the range stamped on the unit ratingplate.

CAUTION!

NOTE: Be sure that all supply--and return--air grilles are open,free from obstructions, and adjusted properly.



Disconnect electrical power to the unit and install lockouttag before changing blower speed.

! WARNING

This unit is factory-set up for use with a single cooling fan speed.In addition, this unit has the field-selectable capability to run twodifferent cooling fan speeds: The rated cooling fan speed (350~400CFM/Ton) and an enhanced dehumidification fan speed (As low as320 CFM/Ton) for use with either a dehumidistat or a thermostatthat supports dehumidification.

The cooling speed is marked “LOW” on the interface fan board(IFB) (See Fig. 18) . The factory-shipped settings are noted inTable 4. There are 4 additional speed tap wires available for use ineither electric heating or cooling (For color coding on the indoorfan motor leads, see Table 3). The additional 4 speed tap wires areshipped loose with vinyl caps and are located in the control box,near the interface fan board (IFB) (See Fig. 18).

Single Cooling Fan Speed Set-up (Dehumidificationfeature not used)To change cooling speed:

1. Remove the vinyl cap off of the desired speed tap wire(Refer to Table 3 for color coding). Add the wet coilpressure drop in Table 7 to the system static to determine thecorrect cooling airflow speed in Table 4 that will deliver thenominal cooling airflow as listed in Table 1 for each size.

2. Remove the current speed tap wire from the “LOW”terminal on the interface fan board (IFB) (See Fig. 18) andplace vinyl cap over the connector on the wire.

3. Connect the desired speed tap wire to the “LOW” terminalon the interface fan board (IFB).

NOTE: If accessory electric heat is installed, and the electric heatfan speed is chosen to be the same as the normal cooling fan speed,the dry airflow must meet or exceed the minimum airflow speedspecified in Table 2 for the specific size unit.

PHD4,WPH4


Two Cooling Fan Speeds Set-up (Dehumidificationfeature used)IMPORTANT: Dehumidification control must open controlcircuit on humidity rise above set point.

Use of the dehumidification cooling fan speed requires use ofeither a 24 VAC dehumidistat or a thermostat which includescontrol of a 24 VAC dehumidistat connection. In either case, thedehumidification control must open the control circuit on humidityrise above the dehumidification set point.

1. Using Fig. 18, move the two pin DEHUM jumper from the“STD” position to the “DEHUM” position.

2. Remove fan speed tap wire from the “LOW” terminal onthe interface fan board (IFB) (See Fig. 18).

3. Determine correct normal cooling fan speed for unit andapplication. Add the wet coil pressure drop in Table 7 tothe system static to determine the correct cooling airflowspeed in Table 4 that will deliver the nominal coolingairflow as listed in Table 1 for each size.

NOTE: If accessory electric heat is installed, the dryairflow must meet or exceed the minimum airflow speedspecified in Table 2 for the specific size unit. The electricheat fan speed will be the same as the normal cooling fanspeed.

4. Remove the vinyl cap off of the desired speed tap wire(Refer to Table 3 for color coding) for the normal coolingfan speed and place desired speed tap wire on “HIGH” onthe interface board.

5. Refer to airflow tables (Table 4) to determine allowablespeeds for the dehumidification cooling fan speed. In Table4, speeds that are not allowed for dehumidification coolingare shaded.

6. Remove the vinyl cap off of the desired speed tap wire(Refer to Table 3 for color coding) for the dehumidificationcooling fan speed and place desired speed tap wire on the“LOW” connection on the interface board (IFB). Verifythat static pressure is in the acceptable range for the speedtap to be used for dehumidification cooling.

7. Use any spare vinyl plugs to cap any unused speed tapwires.

Single Speed Cooling With Higher Electric Heat SpeedThis unit can also be configured to operate with single speedcooling and a higher speed for an accessory electric heater.

1. Move the two pin DEHUM jumper located on controlboard (see Fig. 18) from the “STD” position to the“DEHUM” position.

2. See Table 2 for minimum airflow for electric heat operation.Add electric heater and filter pressure drop to duct systemstatic pressure to determine total external static pressure.

3. Select speed tap from Table 4 that will achieve requiredairflow from Table 2.

4. Remove the vinyl cap off of the desired speed tap wire(Refer to Table 3 for color coding).

5. Connect the desired speed tap wire to the “HIGH” terminalon the interface fan board (IFB).


Failure to follow this caution may result in unit componentdamage or improper operation.

To use this mode, a speed connection must be made on the“HIGH” terminal that meets or exceeds the minimumairflow found in Table 2.

! CAUTION

Table 3 – Color Coding for Indoor Fan Motor LeadsBlack = High Speed

Orange = Med--High Speed

Red = Med Speed

Pink = Med--Low Speed

Blue = Low Speed



Disconnect electrical power to the unit and install lockouttag before changing blower speed.

! WARNING

Continuous Fan OperationWhen the DEHUM feature is not used, the continuous fan speedwill be the same as cooling fan speed. When the DEHUM featureis used, the continuous fan will operate on IFB “LOW” speedwhen the DH control lead is not energized, or IFB “HIGH” speedwhen the DH lead is energized (see Fig. 18).

CO

MP

RE

SS

OR

AC

CU

MU

LATO

R

OUTDOOR COIL INDOOR COIL

LCS

LEGENDHPS – High Pressure SwitchLCS – Loss of Charge Switch

Accurater ® Metering De viceArrow indicates direction of flo w

TXV in Metering Position

BypassPosition

HP S

C03011

Fig. 17 -- Typical Heat Pump Operation, Cooling Mode

PHD4,WPH4


HIGH LOW COMQC5 QC4 QC3

KZ KL

07 09 080L0 ALO R13 C8 R11 Q1

Q3

D2

AL2

DCR QCR

QC1

C

RL01G1

G2

Z1

A7 R9 AB A15

C4C9

C0

QIL Z2 06 04

U1

C3 R4 RL4

JWZ

C7

D5 D3

R3 R5 R6R2

JW5

QCB

Y R W2 Y C W3 W3 W2 W2 C

JW4

P2 JW3

P4

P1W2W3 Y2 Y1

YDH G C R

SSTZ-8

P3

SD

L24

VA

C/R

3AM

PC

DM

/C

F1

ST

DD

EH

UM

A09059

Fig. 18 -- Interface Fan Board (IFB)

CO

MP

RE

SS

OR

AC

CU

MU

LATO

R

OUTDOOR COIL INDOOR COIL

LCS

LEGENDHPS – High Pressure SwitchLCS – Loss of Charge Switch

Accurater ® Metering De viceArrow indicates direction of flo w

Position

HP S

TXV in Bypass

Metering Position

C03012

Fig. 19 -- Typical Heat Pump Operation, Heating ModeStep 3 — Defrost ControlQuiet ShiftQuiet Shift is a field--selectable defrost mode, which will eliminateoccasional noise that could be heard at the start of defrost cycle andrestarting of heating cycle. It is selected by placing DIP switch 3(on defrost board) in ON position.

When Quiet Shift switch is placed in ON position, and a defrost isinitiated, the following sequence of operation will occur. Reversingvalve will energize, outdoor fan will turn off, compressor will turnoff for 30 sec and then turn back on to complete defrost. At thestart of heating after conclusion of defrost reversing valve willde--energize, compressor will turn off for another 30 sec, and theoutdoor fan will stay off for 40 sec, before starting in the Heatingmode.

DefrostThe defrost control is a time/temperature control which includes afield--selectable time period (DIP switch 1 and 2 on the board)between defrost cycles of 30, 60, 90, or 120 minutes (factory set at60 minutes). To initiate a forced defrost, two options are availabledepending on the status of the defrost thermostat.

If defrost thermostat is closed, speed--up pins (J1) must be shortedby placing a flat head screw driver in between for 5 sec andreleasing, to observe a complete defrost cycle. When the QuietShift switch is selected, compressor will be turned off for two 30sec intervals during this complete defrost cycle, as explainedpreviously. When Quiet Shift switch is in factory default OFFposition, a normal and complete defrost cycle will be observed.

If defrost thermostat is in open position, and speedup pins areshorted (with a flat head screw driver) for 5 sec and released, ashort defrost cycle will be observed (actual length is dependentupon the selected Quiet Shift position). When Quiet Shift switch isin ON position, the length of defrost is 1 minute (30 seccompressor off period followed by 30 sec of defrost withcompressor operation). On return to heating operation, compressorwill again turn off for an additional 30 sec and the outdoor fan for40 sec. When the Quiet Shift is in OFF position, only a brief 30sec. cycle will be observed.

NOTE: Unit will remain in defrost until defrost thermostatreopens at approximately 65_F (18_C) coil temperature at liquidline or remainder of defrost cycle time.

PHD4,WPH4


Table4–DryCoilA

irDeliveryCFM*--HorizontalD

ischarge

UNIT

MOTORSPEED

WIRE

COLOR

EXTERNALSTATICPRESSURE(IN.W.C.)

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

24

Low

Blue

CFM

754

650

536

429

------

------

---

Med-Low

Pink

CFM

851

777

675

591

475

------

------

Medium1

Red

CFM

941

851

774

684

576

479

------

---

Med-High

Orange

CFM

1009

917

840

759

667

577

447

------

High

Black

CFM

1241

1167

1111

1036

969

881

818

731

640

30

Low

Blue

CFM

741

638

547

415

------

------

---

Med-Low

Pink

CFM

973

887

823

733

665

538

451

------

Medium

Red

CFM

1088

1023

954

881

800

723

658

563

461

Med-High1

Orange

CFM

1140

1064

996

915

840

758

687

564

480

High

Black

CFM

1202

1140

1082

1015

961

881

810

732

631

36

Low

Blue

CFM

1176

1121

1079

1019

974

920

877

826

754

Med-Low

Pink

CFM

1295

1234

1182

1126

1075

1016

955

898

857

Medium1

Red

CFM

1345

1282

1235

1194

1140

1095

1027

974

921

Med-High

Orange

CFM

1505

1452

1413

1358

1323

1282

1234

1169

1130

High

Black

CFM

1705

1643

1607

1568

1518

1483

1448

1404

1360

42

Low

Blue

CFM

1295

1234

1182

1126

1075

1016

955

898

857

Med-Low

Pink

CFM

1345

1282

1235

1194

1140

1095

1027

974

921

Medium

Red

CFM

1505

1452

1413

1358

1323

1282

1234

1169

1130

Med-High1

Orange

CFM

1545

1492

1449

1411

1362

1313

1278

1231

1188

High

Black

CFM

1705

1643

1607

1568

1518

1483

1448

1404

1360

48

Low

Blue

CFM

1430

1374

1327

1267

1223

1176

1127

1061

1016

Med-Low

Pink

CFM

1445

1389

1341

1281

1236

1189

1139

1072

1027

Medium1

Red

CFM

1678

1635

1602

1558

1513

1474

1438

1404

1349

Med-High

Orange

CFM

2131

2088

2065

2013

1982

1941

1888

1860

1785

High

Black

CFM

2461

2409

2339

2286

2192

2140

2062

1968

1874

60

Low

Blue

CFM

1445

1389

1341

1281

1236

1189

1139

1072

1027

Med-Low

Pink

CFM

1678

1635

1602

1558

1513

1474

1438

1404

1349

Medium1

Red

CFM

1962

1915

1880

1843

1794

1753

1711

1675

1628

Med-High

Orange

CFM

2131

2088

2065

2013

1982

1941

1888

1860

1785

High

Black

CFM

2461

2409

2339

2286

2192

2140

2062

1968

1874

*Airdeliveryvaluesarewithoutairfilterandarefordrycoil(SeeWetCoilPressureDropTable).

1Factory---shippedcooling/heatpumpheatingspeed

NOTE:Deductfield---suppliedairfilterpressuredropandwetcoilpressuredroptoobtainexternalstaticpressureavailableforducting.

Shadedareasindicatespeed/staticcombinationsthatarenotpermittedfordehumidificationspeed.

Note:Deduct10%for208voltoperation.

PH4D,WPH4


Table5–DryCoilA

irDelivery--Dow

nflowDischarge

UNIT

MOTO

RSPEED

WIRE

COLOR

EXTERNALSTA

TIC

PRESSURE(IN.W

.C.)

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.0

24

Low

Blu

eC

FM

809

664

554

447

----

----

----

----

----

----

WA

TT

S85

8287

95---

----

----

----

----

----

-B

HP

0.09

0.09

0.09

0.10

----

----

----

----

----

----

Med

Low

Pin

kC

FM

875

787

693

612

498

392

----

----

----

----

WA

TT

S10

111

111

512

513

114

2---

----

----

----

-B

HP

0.11

0.12

0.12

0.13

0.14

0.15

----

----

----

----

Med

ium

1R

edC

FM

939

860

748

663

591

472

399

----

----

----

WA

TT

S11

912

413

413

814

715

516

4---

----

----

-B

HP

0.13

0.13

0.14

0.15

0.16

0.17

0.18

----

----

----

Med

Hig

hO

rang

eC

FM

1026

949

873

786

694

604

516

----

----

----

WA

TT

S14

615

116

116

717

718

319

5---

----

----

-B

HP

0.16

0.16

0.17

0.18

0.19

0.20

0.21

----

----

----

Hig

hB

lack

CF

M12

6412

0211

3410

7010

0293

187

080

669

961

0W

AT

TS

250

261

274

279

290

296

308

319

328

332

BH

P0.

270.

280.

290.

300.

310.

320.

330.

340.

350.

36

30

Low

Blu

eC

FM

756

669

548

457

----

----

----

----

----

----

WA

TT

S84

9096

106

----

----

----

----

----

----

BH

P0.

090.

100.

100.

11---

----

----

----

----

----

-

Med

Low

Pin

kC

FM

1002

928

842

733

660

560

450

----

----

----

WA

TT

S14

415

516

117

318

519

220

3---

----

----

-B

HP

0.15

0.17

0.17

0.19

0.20

0.21

0.22

----

----

----

Med

ium

Red

CF

M11

1010

2596

787

981

470

661

150

9---

----

-W

AT

TS

188

195

205

211

223

236

243

255

----

----

BH

P0.

200.

210.

220.

230.

240.

250.

260.

27---

----

-

Med

Hig

h1O

rang

eC

FM

1160

1091

1004

945

866

804

699

615

496

----

WA

TT

S21

322

523

224

324

926

127

328

529

1---

-B

HP

0.23

0.24

0.25

0.26

0.27

0.28

0.29

0.31

0.31

----

Hig

hB

lack

CF

M12

4011

7311

1010

3196

690

282

172

662

6---

-W

AT

TS

254

266

274

284

295

302

315

327

331

----

BH

P0.

270.

290.

290.

300.

320.

320.

340.

350.

35---

-

PH4D,WPH4


Table5--DryCoilA

irDelivery--Dow

nflowDischarge

UNIT

MOTO

RSPEED

WIRE

COLOR

EXTERNALSTA

TIC

PRESSURE(IN.W

.C.)

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.0

36

Low

Blu

eC

FM

1307

1249

1192

1138

1084

1038

987

934

886

840

WA

TT

S15

816

017

318

019

320

521

823

023

724

9B

HP

0.17

0.17

0.19

0.19

0.21

0.22

0.23

0.25

0.25

0.27

Med

Low

Pin

kC

FM

1365

1324

1284

1233

1181

1127

1084

1039

984

939

WA

TT

S17

718

920

121

022

223

624

826

126

928

1B

HP

0.19

0.20

0.22

0.23

0.24

0.25

0.27

0.28

0.29

0.30

Med

ium

1R

edC

FM

1425

1384

1339

1301

1254

1199

1151

1104

1065

1015

WA

TT

S19

721

022

323

524

825

727

128

429

630

5B

HP

0.21

0.23

0.24

0.25

0.27

0.28

0.29

0.30

0.32

0.33

Med

Hig

hO

rang

eC

FM

1582

1549

1509

1469

1433

1392

1346

1300

1249

1213

WA

TT

S26

728

029

430

832

233

634

435

937

438

7B

HP

0.29

0.30

0.32

0.33

0.35

0.36

0.37

0.38

0.40

0.42

Hig

hB

lack

CF

M17

7517

3616

9616

6016

2215

8815

5715

1614

7214

26W

AT

TS

371

386

401

410

424

439

453

468

483

497

BH

P0.

400.

410.

430.

440.

450.

470.

490.

500.

520.

53

42

Low

Blu

eC

FM

1365

1324

1284

1233

1181

1127

1084

1039

984

939

WA

TT

S17

718

920

121

022

223

624

826

126

928

1B

HP

0.19

0.20

0.22

0.23

0.24

0.25

0.27

0.28

0.29

0.30

Med

Low

Pin

kC

FM

1425

1384

1339

1301

1254

1199

1151

1104

1065

1015

WA

TT

S19

721

022

323

524

825

727

128

429

630

5B

HP

0.21

0.23

0.24

0.25

0.27

0.28

0.29

0.30

0.32

0.33

Med

ium

Red

CF

M15

8215

4915

0914

6914

3313

9213

4613

0012

4912

13W

AT

TS

267

280

294

308

322

336

344

359

374

387

BH

P0.

290.

300.

320.

330.

350.

360.

370.

380.

400.

42

Med

Hig

h1O

rang

eC

FM

1623

1586

1553

1511

1470

1433

1393

1350

1309

1261

WA

TT

S28

529

931

232

433

534

936

337

839

340

7B

HP

0.31

0.32

0.33

0.35

0.36

0.37

0.39

0.41

0.42

0.44

Hig

hB

lack

CF

M17

7517

3616

9616

6016

2215

8815

5715

1614

7214

26W

AT

TS

371

386

401

410

424

439

453

468

483

497

BH

P0.

400.

410.

430.

440.

450.

470.

490.

500.

520.

53

PH4D,WPH4


Table5--DryCoilA

irDelivery--Dow

nflowDischarge

UNIT

MOTO

RSPEED

WIRE

COLOR

EXTERNALSTA

TIC

PRESSURE(IN.W

.C.)

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80

0.90

1.0

48

Low

Blu

eC

FM

1491

1445

1403

1358

1306

1261

1199

1169

1122

1069

WA

TT

S23

223

925

426

227

829

330

331

632

333

5B

HP

0.25

0.26

0.27

0.28

0.30

0.31

0.32

0.34

0.35

0.36

Med

Low

Pin

kC

FM

1479

1436

1387

1346

1298

1253

1206

1160

1114

1061

WA

TT

S22

423

924

726

227

028

430

030

731

933

0B

HP

0.24

0.26

0.26

0.28

0.29

0.30

0.32

0.33

0.34

0.35

Med

ium

1R

edC

FM

1813

1785

1745

1709

1663

1632

1592

1548

1506

1450

WA

TT

S41

142

743

545

146

247

848

950

451

852

9B

HP

0.44

0.46

0.47

0.48

0.50

0.51

0.52

0.54

0.56

0.57

Med

Hig

hO

rang

eC

FM

2178

2148

2105

2073

2036

2002

1967

1919

1845

1751

WA

TT

S67

469

170

371

773

374

375

875

473

470

1B

HP

0.72

0.74

0.75

0.77

0.79

0.80

0.81

0.81

0.79

0.75

Hig

hB

lack

CF

M24

8024

3223

7523

2222

3621

6120

8520

0619

1718

08W

AT

TS

1029

1012

995

975

941

908

869

836

796

751

BH

P1.

101.

091.

071.

051.

010.

970.

930.

900.

850.

81

60

Low

Blu

eC

FM

1479

1436

1387

1346

1298

1253

1206

1160

1114

1061

WA

TT

S22

423

924

726

227

028

430

030

731

933

0B

HP

0.24

0.26

0.26

0.28

0.29

0.30

0.32

0.33

0.34

0.35

Med

Low

Pin

kC

FM

1841

1796

1761

1724

1690

1651

1616

1578

1527

1478

WA

TT

S42

543

445

346

047

648

550

150

852

554

2B

HP

0.46

0.47

0.49

0.49

0.51

0.52

0.54

0.54

0.56

0.58

Med

ium

1R

edC

FM

1944

1913

1872

1838

1801

1771

1731

1698

1655

1613

WA

TT

S48

650

151

152

953

755

456

557

859

560

3B

HP

0.52

0.54

0.55

0.57

0.58

0.59

0.61

0.62

0.64

0.65

Med

Hig

hO

rang

eC

FM

2178

2148

2105

2073

2036

2002

1967

1919

1845

1751

WA

TT

S67

469

170

371

773

374

375

875

473

470

1B

HP

0.72

0.74

0.75

0.77

0.79

0.80

0.81

0.81

0.79

0.75

Hig

hB

lack

CF

M24

8024

3223

7523

2222

3621

6120

8520

0619

1718

08W

AT

TS

1029

1012

995

975

941

908

869

836

796

751

BH

P1.

101.

091.

071.

051.

010.

970.

930.

900.

850.

81

*Air

deliv

ery

valu

esar

ew

ithou

tair

filte

ran

dar

efo

rdr

yco

il(S

eeW

etC

oilP

ress

ure

Dro

pta

ble)

.1

Fac

tory

--shi

pped

cool

ing

spee

d.NOTE:D

educ

tfie

ld--s

uppl

ied

air

filte

rpr

essu

redr

opan

dw

etco

ilpr

essu

redr

opto

obta

inex

tern

alst

atic

pres

sure

avai

labl

efo

rdu

ctin

g.S

hade

dar

eas

indi

cate

spee

d/st

atic

com

bina

tions

that

are

notp

erm

itted

.

PH4D,WPH4


Table6–FilterPressureDropTable(IN.W

.C.)

FILTERSIZEIN.(MM)

COOLING

TONS

STA

NDARDCFM(SCFM)

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

600-

-140

0C

FM

12x2

0x1+

12x2

0x1

(305

x508

x25+

305x

508x

25)

2.0,

2.5,

3.0

0.03

0.04

0.05

0.06

0.06

0.07

0.07

0.08

0.08

----

----

----

----

1200

--180

0CF

M16

x24x

1+14

x24x

1(4

06x6

10x2

5+35

6x61

0x25

)

3.5,

4.0

----

----

0.04

0.05

0.06

0.07

0.08

0.09

0.09

0.10

0.11

0.12

0.12

----

1500

--220

0CF

M16

x24x

1+18

x24x

1(4

06x6

10x2

5+45

7x61

0x25

)5.0

----

----

----

----

--0.

040.

060.

080.

100.

110.

130.

140.

15

Table7–WetCoilPressureDrop(IN.W

.C.)

UNIT

SIZE

STA

NDARDCFM(SCFM)

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

240.

030.

040.

040.

050.

0630

0.05

0.06

0.07

0.08

0.11

360.

060.

060.

090.

100.

110.

1442

0.05

0.05

0.06

0.07

0.08

0.08

0.09

0.09

0.11

480.

040.

060.

090.

100.

100.

110.

120.

130.

1460

0.06

0.07

0.01

0.08

0.09

0.10

0.12

0.13

Table8–Economizerwith1--in.FilterPressureDrop(IN.W

.C.)

FILTERSIZEIN.(MM)

COOLING

TONS

STA

NDARDCFM(SCFM)

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

600-

-140

0C

FM

12x2

0x1+

12x2

0x1

(305

x508

x25+

305x

508x

25)

2.0,

2.5,

3.0

----

0.08

0.09

0.10

0.11

0.11

0.13

0.14

----

----

----

----

1200

--180

0CF

M16

x24x

1+14

x24x

1(4

06x6

10x2

5+35

6x61

0x25

)

3.5,

4.0

----

----

--0.

090.

090.

100.

120.

130.

150.

170.

170.

190.

21--

--

1500

--220

0CF

M16

x24x

1+18

x24x

1(4

06x6

10x2

5+45

7x61

0x25

)5.0

----

----

----

----

--0.

150.

170.

180.

200.

210.

220.

230.

23

PH4D,WPH4


Table9–ElectricHeatPressureDropTable(in.W.C.)

SmallC

abinet:24--36

STATIC

STA

NDARDCFM(SCFM)

500

600

700

800

900

1000

1100

1200

1300

1400

1500

1600

5kw

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.02

0.04

0.06

0.07

7.5kw

0.00

0.00

0.00

0.00

0.00

0.00

0.02

0.03

0.05

0.07

0.08

0.09

10kw

0.00

0.00

0.00

0.00

0.00

0.02

0.04

0.06

0.07

0.09

0.10

0.11

15kw

0.00

0.00

0.00

0.02

0.04

0.06

0.08

0.10

0.12

0.14

0.16

0.18

20kw

0.00

0.00

0.02

0.04

0.06

0.08

0.09

0.11

0.13

0.15

0.17

0.19

ElectricHeatPressureDropTable(in.W.C.)

LargeCabinet42--60

STATIC

STANDARDCFM(SCFM)

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

5kw

0.00

0.00

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

7.5kw

0.00

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

10kw

0.00

0.00

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

15kw

0.00

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

0.14

0.15

20kw

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.10

0.11

0.12

0.13

0.14

0.15

0.16

PH4D,WPH4


MAINTENANCETo ensure continuing high performance, and to minimize thepossibility of premature equipment failure, periodic maintenancemust be performed on this equipment. This heat pump unit shouldbe inspected at least once each year by a qualified service person.To troubleshoot unit, refer to Table 10.

NOTE: TO EQUIPMENT OWNER: Consult your local dealerabout the availability of a maintenance contract.

PERSONAL INJURY AND UNIT DAMAGE HAZARD

Failure to follow this warning could result in personal injuryor death and unit component damage.

The ability to properly perform maintenance on thisequipment requires certain expertise, mechanical skills, toolsand equipment. If you do not possess these, do not attempt toperform any maintenance on this equipment, other than thoseprocedures recommended in the Owner’s Manual.

! WARNING


Failure to follow these warnings could result in personalinjury or death:

1. Turn off electrical power to the unit and install a lockouttag before performing any maintenance or service on thisunit.

2. Use extreme caution when removing panels and parts.

3. Never place anything combustible either on or in contactwith the unit.

! WARNING


Failure to follow this caution may result in improperoperation.

Errors made when reconnecting wires may cause improperand dangerous operation. Label all wires prior todisconnecting when servicing.

CAUTION!

The minimum maintenance requirements for this equipment are asfollows:

1. Inspect air filter(s) each month. Clean or replace whennecessary.

2. Inspect indoor coil, drain pan, and condensate drain eachcooling season for cleanliness. Clean when necessary.

3. Inspect blower motor and wheel for cleanliness eachcooling season. Clean when necessary.

4. Check electrical connections for tightness and controls forproper operation each cooling season. Service whennecessary.

Step 1 — Air FilterIMPORTANT: Never operate the unit without a suitable air filterin the return--air duct system. Always replace the filter with thesame dimensional size and type as originally installed. See Table 1for recommended filter sizes.

Inspect air filter(s) at least once each month and replace(throwaway--type) or clean (cleanable--type) at least twice duringeach cooling season and twice during the heating season, orwhenever the filter becomes clogged with dust and lint.

Indoor Blower and MotorNOTE: All motors are pre--lubricated. Do not attempt to lubricatethese motors.

NOTE: 460 volt units have a stepdown autotransformer thatsupplies approximately 230 volts to a nominal 230 volt indoorblower motor.

For longer life, operating economy, and continuing efficiency,clean accumulated dirt and grease from the blower wheel andmotor annually.



Disconnect and tag electrical power to theunit beforecleaningthe blower motor and wheel.

! WARNING

To clean the blower motor and wheel:

1. Remove and disassemble blower assembly as follows:

a. Remove blower access panel (see Fig 22).

b. Disconnect 5 pin plug and 4 pin plug from indoorblower motor. Remove capacitor if required.

c. On all units remove blower assembly from unit.Remove screws securing blower to blower partition andslide assembly out. Be careful not to tear insulation inblower compartment.

d. Ensure proper reassembly by marking blower wheel andmotor in relation to blower housing before disassembly.

e. Loosen setscrew(s) that secures wheel to motor shaft,remove screws that secure motor mount brackets tohousing, and slide motor and motor mount out ofhousing.

2. Remove and clean blower wheel as follows:

a. Ensure proper reassembly by marking wheel orientation.

b. Lift wheel from housing. When handling and/orcleaning blower wheel, be sure not to disturb balanceweights (clips) on blower wheel vanes.

c. Remove caked--on dirt from wheel and housing with abrush. Remove lint and/or dirt accumulations fromwheel and housing with vacuum cleaner, using softbrush attachment. Remove grease and oil with mildsolvent.

d. Reassemble wheel into housing.

e. Reassemble motor into housing. Be sure setscrews aretightened on motor shaft flats and not on round part ofshaft. Reinstall blower into unit. Reinstall capacitor.

f. Connect 5 pin plug and 4 pin plug to indoor blowermotor.

g. Reinstall blower access panel (see Fig. 23).

3. Restore electrical power to unit. Start unit and check forproper blower rotation and motor speeds during coolingcycles.

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A09412

Fig. 20 -- Cooling Charging Table--Subcooling

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OF

2

OF

1

ON

QU

IET

SH

IFT

120

3060

6030

90IN

TE

RV

AL T

IME

RO

FF

P3

DF

T

O R

W2 Y

C

T2 C

C O

DF

T

T1

YP

1J1

SP

EE

DU

P

SpeedupPins

Defrost intervalDIP switches

QuietShift

A08020

Fig. 21 -- Defrost Control

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Step 2 — Outdoor Coil, Indoor Coil, andCondensate Drain PanInspect the condenser coil, evaporator coil, and condensate drainpan at least once each year.

The coils are easily cleaned when dry; therefore, inspect and cleanthe coils either before or after each cooling season. Remove allobstructions, including weeds and shrubs, that interfere with theairflow through the condenser coil.

Straighten bent fins with a fin comb. If coated with dirt or lint,clean the coils with a vacuum cleaner, using the soft brushattachment. Be careful not to bend the fins. If coated with oil orgrease, clean the coils with a mild detergent--and--water solution.Rinse coils with clear water, using a garden hose. Be careful not tosplash water on motors, insulation, wiring, or air filter(s). For bestresults, spray condenser coil fins from inside to outside the unit. Onunits with an outer and inner condenser coil, be sure to cleanbetween the coils. Be sure to flush all dirt and debris from the unitbase.

Inspect the drain pan and condensate drain line when inspectingthe coils. Clean the drain pan and condensate drain by removing allforeign matter from the pan. Flush the pan and drain trough withclear water. Do not splash water on the insulation, motor, wiring, orair filter(s). If the drain tube is restricted, clear it with a plumberssnake or similar probe device.

Step 3 — Outdoor FanKeep the condenser fan free from all obstructions to ensure propercooling operation. Never place articles on top of the unit. Damageto unit may result.

1. Remove 6 screws holding outdoor grille and motor to topcover.

2. Turn motor/grille assembly upside down on top cover toexpose fan blade.

3. Inspect the fan blades for cracks or bends.

4. If fan needs to be removed, loosen setscrew and slide fan offmotor shaft.

5. When replacing fan blade, position blade back to same posi-tion as before.

6. Ensure that setscrew engages the flat area on the motor shaftwhen tightening.

7. Replace grille.

Step 4 — Electrical Controls and WiringInspect and check the electrical controls and wiring annually. Besure to turn off the electrical power to the unit.

Remove access panels (see Fig 22) to locate all the electricalcontrols and wiring. Check all electrical connections for tightness.Tighten all screw connections. If any discolored or burnedconnections are noticed, disassemble the connection, clean all theparts, restrip the wire end and reassemble the connection properlyand securely.

After inspecting the electrical controls and wiring, replace all thepanels. Start the unit, and observe at least one complete coolingcycle to ensure proper operation. If discrepancies are observed inoperating cycle, or if a suspected malfunction has occurred, checkeach electrical component with the proper electricalinstrumentation. Refer to the unit wiring label when making thesecheckouts.

Step 5 — Refrigerant CircuitInspect all refrigerant tubing connections.

If low performance is suspected, leak--test all refrigerant tubingusing an electronic leak detector, or liquid--soap solution. If arefrigerant leak is detected, refer to Check for Refrigerant Leakssection.

If no refrigerant leaks are found and low performance is suspected,refer to Checking and Adjusting Refrigerant Charge section.

Step 6 — Indoor AirflowThe heating and/or cooling airflow does not require checkingunless improper performance is suspected. If a problem exists, besure that all supply--air and return--air grilles are open and freefrom obstructions, and that the air filter is clean. When necessary,refer to Indoor Airflow and Airflow Adjustments section to checkthe system airflow.

Step 7 — Metering Devices--TXV & PistonThis unit uses 2 types of metering devices. The outdoor meteringdevice is a fixed orifice and is contained in the brass hex--body ineach liquid line feeding the outdoor coils. The indoor meteringdevice is a TXV type device.

C99097

Fig. 22 -- Refrigerant Circuit

COMPRESSORACCESS PANEL

BLOWERACCESS PANEL

CONTROLACCESSPANEL

A09207

Fig. 23 -- Unit Access PanelsStep 8 — Pressure SwitchesPressure switches are protective devices wired into control circuit(low voltage). They shut off compressor if abnormally high or lowpressures are present in the refrigeration circuit. These pressureswitches are specifically designed to operate with R--410Asystems. R--22 pressure switches must not be used as replacementsfor the R--410A system.

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Step 9 — Loss of Charge SwitchThis switch is located on the liquid line and protects against lowsuction pressures caused by such events as loss of charge, lowairflow across indoor coil, dirty filters, etc. It opens on a pressuredrop at about 20 psig. If system pressure is above this, switchshould be closed. To check switch:

1. Turn off all power to unit.2. Disconnect leads on switch.3. Apply ohm meter leads across switch. You should havecontinuity on a good switch.

NOTE: Because these switches are attached to refrigerationsystem under pressure, it is not advisable to remove this device fortroubleshooting unless you are reasonably certain that a problemexists. If switch must be removed, remove and recover all systemcharge so that pressure gauges read 0 psig. Never open systemwithout breaking vacuum with dry nitrogen.

Step 10 — High--Pressure SwitchThe high--pressure switch is located in the discharge line andprotects against excessive condenser coil pressure. It opens at 650psig.

High pressure may be caused by a dirty outdoor coil, failed fanmotor, or outdoor air recirculation.

To check switch:

1. Turn off all power to unit.2. Disconnect leads on switch.3. Apply ohm meter leads across switch. You should havecontinuity on a good switch.

Step 11 — Copeland Scroll Compressor (R--410ARefrigerant)The compressor used in this product is specifically designed tooperate with R--410A refrigerant and cannot be interchanged.

EXPLOSION HAZARD

Failure to follow this warning couldresult in personal injury, death orproperty damage.

Wear safety glasses and gloves whenhandling refrigerants. Keep torchesand other ignition sources away fromrefrigerant and oils.

! WARNING

The scroll compressor pumps refrigerant throughout the system bythe interaction of a stationary and an orbiting scroll. The scrollcompressor has no dynamic suction or discharge valves, and it ismore tolerant of stresses caused by debris, liquid slugging, andflooded starts. The compressor is equipped with an internalpressure relief port. The pressure relief port is a safety device,designed to protect against extreme high pressure. The relief porthas an operating range between 550 and 625 psig differentialpressure.

Step 12 — Refrigerant SystemThis step covers the refrigerant system including the compressoroil needed, servicing systems on roofs containing syntheticmaterials, the filter drier and refrigerant charging.

Refrigerant

PROPERTY HAZARD, PERSONAL INJURY ORENVIRONMENTAL HAZARD

Failure to follow thiswarning could result in property damageor personal injury or death.This system uses R--410A refrigerant which has higheroperating pressures thanR--22 and other refrigerants. Nootherrefrigerant may be used in this system. Gauge set, hoses, andrecovery system must be designed to handle R--410A. If youare unsure consult the equipment manufacturer.

! WARNING

This system uses R--410A refrigerant which has higher operatingpressures than R--22 and other refrigerants. No other refrigerantmay be used in this system. Gage set, hoses, and recovery systemmust be designed to handle R--410A. If you are unsure, consult theequipment manufacturer. Failure to use R--410A compatibleservicing equipment or replacement components may result inproperty damage or injury.Compressor OilThe Copeland scroll compressor uses 3MAF POE oil. If additionaloil is needed, use Uniqema RL32--3MAF. If this oil is notavailable, use Copeland Ultra 32 CC or Mobil Arctic EAL22 CC.This oil is extremely hygroscopic, meaning it absorbs waterreadily. POE oils can absorb 15 times as much water as other oilsdesigned to HCFC and CFC refrigerants. Take all necessaryprecautions to avoid exposure of the oil to the atmosphere.Servicing Systems on Roofs with Synthetic MaterialsPOE (polyolester) compressor lubricants are known to cause longterm damage to some synthetic roofing materials. Exposure, even ifimmediately cleaned up, may cause embrittlement (leading tocracking) to occur in one year or more. When performing anyservice that may risk exposure of compressor oil to the roof, takeappropriate precautions to protect roofing. Procedures which riskoil leakage include, but are not limited to, compressor replacement,repairing refrigerant leaks, replacing refrigerant components suchas filter drier, pressure switch, metering device, coil, accumulator,or reversing valve.Synthetic Roof Precautionary Procedure

1. Cover extended roof working area with an impermeablepolyethylene (plastic) drip cloth or tarp. Cover anapproximate 10x10 ft (3x3 m) area.

2. Cover area in front of the unit service panel with a terrycloth shop towel to absorb lubricant spills and preventrun--offs, and protect drop cloth from tears caused by toolsor components.

3. Place terry cloth shop towel inside unit immediately undercomponent(s) to be serviced and prevent lubricant run--offsthrough the louvered openings in the unit base.

4. Perform required service.5. Remove and dispose of any oil contaminated material perlocal codes.

Liquid Line Filter DrierThe biflow filter drier is specifically designed to operate withR--410A. Use only factory--authorized components. Filter driermust be replaced whenever the refrigerant system is opened. Whenremoving a filter drier, use a tubing cutter to cut the drier from thesystem. Do not unsweat a filter drier from the system. Heat fromunsweating will release moisture and contaminants from drier intosystem.

R--410A Refrigerant ChargingRefer to unit information plate and charging chart. Some R--410Arefrigerant cylinders contain a dip tube to allow liquid refrigerant toflow from cylinder in upright position. For cylinders equippedwith a dip tube, charge R--410A units with cylinder in uprightposition and a commercial metering device in manifold hose.Charge refrigerant into suction--line.

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Step 13 — System InformationLoss of Charge SwitchThe loss of charge switch is a protective device wired into controlcircuit (low voltage). It shuts off the compressor if abnormally lowpressures are present in the refrigeration circuit.

NOTE: Because these switches are attached to refrigerationsystem under pressure, it is not advisable to remove this device fortroubleshooting unless you are reasonably certain that a problemexists. If switch must be removed, remove and recover all systemcharge so that pressure gauges read 0 psig. Never open systemwithout breaking vacuum with dry nitrogen.

Check Defrost ThermostatThe defrost thermostat is usually located on the lowest liquidleaving circuit of the left condenser coil (see Fig. 24). Thethermostat closes at 32_F (0_C) and opens at 65_F (18_C).

The defrost thermostat signals heat pump that conditions are rightfor defrost or that conditions have changed to terminate defrost. Itis a thermally actuated switch clamped to outdoor coil to sense itstemperature. Normal temperature range is closed at 32_ 3_F (0 1.7_C) and open at 65_ 5_F (18 2.8_C).

NOTE: The defrost thermostat must be located on the liquid sideof the outdoor coil on the bottom circuit and as close to the coil aspossible.

FEEDER TUBE

STUB TUBE

DEFROSTTHERMOSTAT

C99029

Fig. 24 -- Defrost Thermostat

TROUBLESHOOTINGRefer to the Cooling and Heating Troubleshooting Chart (Table10) for troubleshooting information.

START--UP CHECKLISTUse the Start--Up Checklist.

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R--410A QUICK REFERENCE GUIDE

S R--410A refrigerant operates at 50--70 percent higher pressures than R--22. Be sure that servicing equipment and replacement

components are designed to operate with R--410A

S R--410A refrigerant cylinders are rose colored.

S Recovery cylinder service pressure rating must be 400 psig, DOT 4BA400 or DOT BW400.

S R--410A systems should be charged with liquid refrigerant. Use a commercial type metering device in the manifold hose when

charging into suction line with compressor operating

S Manifold sets should be minimum 700 psig high side and 180 psig low side with 550 psig low--side retard.

S Use hoses with minimum 700 psig service pressure rating.

S Leak detectors should be designed to detect HFC refrigerant.

S R--410A, as with other HFCs, is only compatible with POE oils.

S Vacuum pumps will not remove moisture from oil.

S Do not use liquid--line filter driers with rated working pressures less than 600 psig.

S Do not leave R--410A suction line filter driers in line longer than 72 hours.

S Do not install a suction--line filter drier in liquid line.

S POE oils absorb moisture rapidly. Do not expose oil to atmosphere.

S POE oils may cause damage to certain plastics and roofing materials.

S Wrap all filter driers and service valves with wet cloth when brazing.

S A factory approved liquid--line filter drier is required on every unit.

S Do NOT use an R--22 TXV.

S Never open system to atmosphere while it is under a vacuum.

S When system must be opened for service, recover refrigerant, evacuate then break vacuum with dry nitrogen and replace filter

driers. Evacuate to 500 microns prior to recharging.

S Do not vent R--410A into the atmosphere.

S Observe all warnings, cautions, and bold text.

S All indoor coils must be installed with a hard shutoff R--410A TXV metering device.

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Table 10 – Troubleshooting Chart

SYMPTOM CAUSE REMEDY

Compressor and condenser fan will not start.

Power failure Call power company

Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker

Defective contactor, transformer, or high--pressure,loss--of--charge or low--pressure switch

Replace component

Insufficient line voltage Determine cause and correct

Incorrect or faulty wiring Check wiring diagram and rewire correctly

Thermostat setting too highLower thermostat setting below room tempera-ture

Compressor will not start but condenser fanruns

Faulty wiring or loose connections in compressor cir-cuit Check wiring and repair or replace

Compressor motor burned out, seized, or internaloverload open

Determine cause. Replace compressor.

Defective run/start capacitor, overload, start relay Determine cause and replace

One leg of 3--phase power deadReplace fuse or reset circuit breakerDetermine cause

Three--phase scroll compressor makes exces-sive noise, and there may be a low pressuredifferential.

Scroll compressor is rotating in the wrong direction Correct the direction of rotation by reversing the3--phase power leads to the unit.

Compressor cycles (other than normally sat-isfying thermostat).

Refrigerant overcharge or underchargeRecover refrigerant, evacuate system, and re-charge to capacities shown on rating plate

Defective compressor Replace and determine cause

Insufficient line voltage Determine cause and correct

Blocked condenser Determine cause and correct

Defective run/start capacitor, overload or start relay Determine cause and replace

Defective thermostat Replace thermostat

Faulty condenser--fan motor or capacitor Replace

Restriction in refrigerant system Locate restriction and remove

Compressor operates continuously

Dirty air filter Replace filter

Unit undersized for load Decrease load or increase unit size

Thermostat set too low Reset thermostat

Low refrigerant charge Locate leak, repair, and recharge

Mechanical damage in compressor Replace compressor

Air in systemRecover refrigerant, evacuate system, and re-charge

Condenser coil dirty or restricted Clean coil or remove restriction

Excessive head pressure


Dirty condenser coil Clean coil

Refrigerant overcharged Recover excess refrigerant

Air in systemRecover refrigerant, evacuate system, and re-charge

Condenser air restricted or air short--cycling Determine cause and correct

Head pressure too low

Low refrigerant charge Check for leaks, repair, and recharge.

Compressor IPR leaking Replace compressor

Restriction in liquid tube Remove restriction

Excessive suction pressure

High heat load Check for source and eliminate

Compressor IPR leaking Replace compressor

Refrigerant overcharged Recover excess refrigerant

Suction pressure too low


Low refrigerant charge Check for leaks, repair and recharge

Metering device or low side restricted Remove source of restriction

Insufficient evaporator airflowIncrease air quantityCheck filter–replace if necessary

Temperature too low in conditioned area Reset thermostat

Outdoor ambient below 55F (12.7C) Install low--ambient kit

Filter drier restricted Replace filter

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START--UP CHECKLIST(Remove and Store in Job Files)

I. PRELIMINARY INFORMATIONMODEL NO.:

SERIAL NO.:

DATE:

TECHNICIAN:

II. PRESTART--UP (Insert check mark in box as each item is completed)( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT

( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS

( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS

( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE

( ) VERIFY THAT UNIT INSTALLATION IS LEVEL

( ) CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS

III. START--UPELECTRICALSUPPLY VOLTAGE

COMPRESSOR AMPS

INDOOR (EVAPORATOR) FAN AMPS

TEMPERATURESOUTDOOR (CONDENSER) AIR TEMPERATURE DB

RETURN--AIR TEMPERATURE DB WB

COOLING SUPPLY AIR DB WB

HEAT PUMP SUPPLY AIR _____________________

ELECTRIC HEAT SUPPLY AIR _____________

PRESSURESREFRIGERANT SUCTION PSIG, SUCTION LINE TEMP*

REFRIGERANT DISCHARGE PSIG, LIQUID TEMP{

( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS* Measured at suction inlet to compressor{ Measured at liquid line leaving condenser.

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Copyright 2015 International Comfort ProductsLewisburg, TN 37091 USA Replaces: 518 01 2004 00

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14 seer single--packaged heat pump system with r--410a ...specifications are subject to change...

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