SAFETY CONSIDERATIONS

Install and servicing air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install or service air-conditioning equipment untrained personnel may perform basic maintenance such as cleaning and replacing filters. All other operations should be performed by trained service personnel. When working on air conditioning equipment, observe safety precautions in literature, and on tags and labels attached to unit. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have a fire extinguisher available. Read these instructions thoroughly. Consult local building codes and National Electrical Code (NEC) for special installation requirements.

38HK 18-70

(50/60 Hz)

1-6 Nomin Condensing Units

38HQ 18-24

InstaSe

llation,ervice I

Start-Instruct

andtionsUp

al Tons.

CONTENTS Page SAFETY CONSIDERATIONS …………………...………… . INSTALLATION …………………………………….………… Step 1 — Complete Pre-Installation Checks ……………• UNPACK UNIT………………………………………………. • INSPECT SHIPMENT………………………………………. • CONSIDER SYSTEM REQUIREMENTS…………………. Step 2 — Rig and Mount Unit …………………………… • MOUNTING ON GROUND………………………………… • MOUNTING ON WALL……………………………………. • MOUNTING ON ROOF……………………………………… • RIGGING…………………………………………………….. Step 3 — Complete Refrigerant Piping Connections …• MAKE PIPING SWEAT CONNECTIONS…………………. • PROVIDE SAFETY RELIEF………………………………. Step 4 — Make Electrical Connections ……………….. • POWER WIRING…………………………………………… • CONTROL CIRCUIT WIRING……………………………… • CONNECTIONS TO DUCT-FREE FAN COIL UNITS…….. Step 5 — Accessory Installation…………………………. START-UP……………………................................................ SERVICE …………………………………………………… MAINTENANCE ………………………………………….. WIRING DIAGRAMS……………………………………….TROUBLESHOOTING ……………………………………. .

11111133333334444456679

12

Base Unit Dimensions38H 018-036

6

7

Base Unit Dimensions38H 048-070

A B C D E F G H UNIT 38H Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm

048-070 3-13⁄16 944.6 3-89⁄16 1131.9 1-51⁄16 433.4 1-67⁄16 468.3 2-61⁄2 774.7 1-75⁄8 498.5 1-75⁄8 498.5 2-55⁄8 752.5

NOTES: 1. Required clearances: with coil facing wall allow 8 in. minimum clearance on coil side and coil end, and 3 ft minimum clearance on compressor end and fan side. 2. Dimensions in [ ] are in millimeters.

2

Physical Data UNIT 38H 18 24 30 36 48 60 NOMINAL CAPACITY (Tons) 1.5 2 2.5 3 4.0 5.0 OPERATING WEIGHT (lb) 123 139 154 161 211 227SHIPPING DIMENSIONS (in) (W X H X D) 37 x 29.7 x 16.1 50.4 X 40.2 X 30COMPRESSOR

ReciprocatingCool OnlyHeat Pump Rotary --REFRIGERANT TYPE R22 METERING DEVICEDucted Application Nozzle, in the indoor unitUn-ducted Application Capillary Tube Nozzle, in the indoor unit FINISH Gray OUTDOOR FAN Propeller Type RPM/CFM 1100/2000 860/3,000 Diameter, No. Blades 18 in, 3 24 in, 3Motor Horsepower, 1/12 1/3 COIL DATA Face Area (sq ft) 6.3 12.05Tubes Smooth Helical groovedFins Aluminium, Double Wavy FPI 15 17 17 15 12 14 REFRIGERANT LINES Connection Type Flare Liquid Line 3/8 inch Vapour Line 5/8 in. 3/4 in. 7/8 inch* Max Length 50 ft Max Lift 30 ft Max Drop 30 ft * Sweat adapter kit is provided for 7/8” tube size

706.0253

Scroll

Matching Matrix

38HD

SINGLE PHASE THREE PHASE FREQUENCY INDOOR UNIT

SIZE 48 SIZE 60 SIZE 48 SIZE 60

FB4A 38HD48-3-CF 38HD60-3-CF 38HD48-5-CF 38HD60-5-CF

FREE STAND 38HD48-3-CT 38HD60-3-CT 38HD48-5-CT 38HD60-5-CT

42TX 38HD48-3-CT — 38HD48-5-CT — 60HZ

CASSETTE 38HD48-3-CT — 38HD48-5-CT —

42TX — — 38HD48-9-CT —

FB4A — — 38HD48-9-CF 38HD60-9-CF

CASSETTE TBD 50HZ

FREE STAND TBD

COMPRESSOR CHARGE & NOZZLE SIZE 38HD

VOLTAGE 208/230-1-60 208/230-3-60 400-3-50 INDOOR UNIT

MODEL SIZE 048 060 070 048 060 070 048 060 070

42TX Nozzle Size(in) Charge (lb)

0.076 10.2

——

——

0.076 10.3

——

——

0.076 10.2

——

——

FB4A Nozzle Size(in) Charge (lb)

0.084 9.57

0.088 10.03

——

0.084 9.48

0.088 9.6

——

0.076 9.92

0.088 9.72

——

40GKX Nozzle Size(in) Charge (lb)

0.07 8.73

——

——

0.07 10.75

——

——

TBD ——

——

42S/HD-B Nozzle Size(in) Charge (lb)

0.084 10.67

0.098 11.86

——

0.084 10.9

0.098 12.03

——

TBD ——

——

LEGEND - Unit shipped with a holding factory charge of 2.2 lb. NOTE: Charge based on 25 ft of interconnecting tubing. For longer tube line, add (0.22 lb) for every 10 ft increase in length.

3

COOL ONLY MODELS

Nominal Cap. MBtuh OUTDOOR MODEL Power Supply Compressor Fan

FLA LRA FLA

18

38HKC018US70 220-240/1/50 9.7 51.0 1.0 38HKR018US70 220-240/1/50 9.7 51.0 1.0 38HKC018DS70 220-240/1/50 9.7 51.0 1.0 38HKC018US70 220-240/1/50 9.7 51.0 1.0 38HKR018US70 220-240/1/50 9.7 51.0 1.0

24 38HKC024US70 220-240/1/50 14.0 58.0 1.0 38HKR024US70 220-240/1/50 14.0 58.0 1.0 38HKC024DS70 220-240/1/50 14.0 58.0 1.0

30 38HKC030US70 220-240/1/50 13.4 85.0 1.0 38HKC030DS70 220-240/1/50 13.4 85.0 1.0

36 38HKC36US70 220-240/1/50 13.4 85.0 1.0 38HKC36DS70 220-240/1/50 17.0 90.0 1.0

48 38HKC48US90 400/3/50 6.7 53.0 2.3 38HKC48DS90 400/3/50 6.7 53.0 2.3

60 38HKC60DS90 400/3/50 9.1 82.0 2.3 38HKC60US90 400/3/50 9.1 82.0 2.3

70 38HKS70DS90 400/3/50 9.6 82.0 2.3

18

38HKC018US30 220/1/60 9.6 55.0 0.9 38HKR018US30 220/1/60 9.1 40.0 0.9 38HKC018UP30 220/1/60 9.6 55.0 0.9 38HKC018DS30 220/1/60 9.6 55.0 0.9

24

38HKC024US30 220/1/60 12.5 60.0 0.9 38HKR024US30 220/1/60 10.1 53.0 0.9 38HKC024UP30 220/1/60 12.5 60.0 0.9 38HKC024DS30 220/1/60 12.5 60.0 0.9

30 38HKC030US30 220/1/60 13.5 82.0 0.9 38HKC030DS30 220/1/60 13.5 82.0 0.9

36 38HKC036US30 220/1/60 14.4 88.0 0.9 38HKC036DS30 220/1/60 14.4 88.0 0.9

48

38HKC048US30 220/1/60 18.5 118.0 2.1 38HKC048US50 220/3/60 11.4 78.0 2.1 38HKC048DS30 220/1/60 18.5 118.0 2.1 38HKC048DS50 220/3/60 11.4 78.0 2.1

60

38HKC060US30 220/1/60 26.6 178.0 2.1 38HKC060US50 220/3/60 15.0 114.0 2.1 38HKC060DS30 220/1/60 26.6 178.0 2.1 38HKC060DS50 220/3/60 15.0 114.0 2.1

70 38HKS070DS50 220/3/60 16.0 150.0 2.1 38HKS070DS20 380/3/60 8.3 75.0 2.1

Heat Pump

Nominal Cap. MBtuh OUTDOOR MODEL Power Supply Compressor Fan

FLA LRA FLA 18 38HQR018US70 220-240/1/50 9.7 51.0 1.0 24 38HQR024US70 220-240/1/50 14.0 58.0 1.0

18 38HQR018US30 220/1/60 9.1 40.0 0.9 38HQR018UP30 220/1/60 9.1 40.0 0.9

24 38HQR024US30 220/1/60 10.1 53.0 0.9 38HQR024UP30 220/1/60 10.1 53.0 0.9

Electrical Data

4

INSTALLATION

Step 1 — Complete Pre-Installation Checks UNPACK UNIT—Move unit to final location. Remove carton from unit, being careful not to damage service valves or grilles. INSPECT SHIPMENT — File claim with shipping company if shipment is damaged or incomplete. Check unit nameplate to ensure unit matches job requirements. CONSIDER SYSTEM REQUIREMENTS — Consult local building codes and NEC for special installation requirements. Allow sufficient space for airflow clearance, wiring, refrigerant piping, and servicing unit. See Fig. 1 and 2. Unit can be mounted on a level pad directly on base legs or mounted on raised pads at support points.

WARNING Before installing or servicing system, always turn off main power to system.

Step 2 — Rig and Mount Unit MOUNTING ON GROUND—Mount unit on a solid, level concrete pad. Position unit so water from roof does not fall directly into unit. Accessory stacking kits can be used when units are to be stacked. If conditions or local codes require unit to be fastened to a pad, 6 field-supplied tiedown bolts should be used and fastened through slots provided in unit mounting feet. See Fig. 5 .

MOUNTING ON WALL—See Fig. 4 for wall mounting.

MOUNTING ON ROOF—Mount unit on level platform or frame at least 6 in. above roof surface. Isolate unit and tubing from structure. RIGGING

CAUTION All panels must be in place when rigging.

MOUNTING POSITION— The unit should be installed outdoors in a place where air will not be stagnant. In case of installing more than one unit, units should be arranged in a way that no exhausted air will be sucked in as an intake for another unit. Enough space should be kept

Fig.-3 lifting unit with sling

Fig.-5 Ground Mounting

Fig.-4 Wall Mounting

grade and condition. Do not use less than 10 ft of interconnecting tubing.

CAUTION DO NOT BURY MORE THAN 36 IN. OF REFRIGERANT PIPE IN THE GROUND. If any section of pipe is buried, there must be a 6 in. vertical rise to the valve connections on the outdoor unit. If more than the recommended length is buried, refrigerant may migrate to the cooler, buried section during extended periods of system shutdown. This causes refrigerant slugging and could damage compressor at start-up.

When more than 50 ft of interconnecting tubing and more than 30 ft of vertical lift is used, refer to appendix in page 15.

Table 1-MAXIMUM LINE LENGTHS

UNIT MAXIMUM

EQUIVALENT FT

MAXIMUM LIFT — FAN COIL

BELOW CONDENSING

UNIT

MAXIMUM LIFT — FAN COIL

ABOVE CONDENSING

UNIT 38HK 50 30* 30*

*Maximum distance permitted is 30 ft from lowest system component to highest system component.

If either refrigerant tubing or indoor coil is exposed to atmospheric conditions for longer than 5 minutes, it must be evacuated to 1000

around the unit for air flow clearance, wiring, refrigerant piping and servicing. The unit should not be installed near to any source of heat, steam or any flammable gas. Step 3—Complete Refrigerant Piping Connections— Outdoor units may be connected to indoor units using field-supplied tubing of refrigerant

Keep unit upright. Lift unit using sling. Use cardboard or padding under sling, and spreader bars to prevent sling damage to unit. See Fig. 3. Install unit so coil does not face into prevailing winds.

5

microns to eliminate contamination and moisture in the system. Run refrigerant tubes as directly as possible, avoiding unnecessary turns and bends. Suspend refrigerant tubes so they do not damage insulation on vapor tube and do not transmit vibration to the structure. Also, when passing refrigerant tubes through the wall, seal opening so that vibration is not transmitted to structure. Leave some slack in refrigerant tubes between structure and outdoor unit to absorb vibration. Refer to separate indoor unit installation instructions for additional information.

MAKE PIPING SWEAT CONNECTIONS—Remove plastic caps from liquid and suction service valves. Use refrigerant grade tubing. Service valves are closed from the factory and ready for brazing. After wrapping the service valve with a wet cloth, the tubing set can be brazed to the service valve using either silver bearing or non-silver bearing brazing material. Consult local code requirements. Refrigerant tubing and indoor coil are ready for leak testing. NOTE: Unit is shipped with R-22 Holding factory charge indicated on nameplate. Pass nitrogen or other inert gas through piping while brazing to prevent formation of copper oxide.

CAUTION To avoid damage while brazing, service valves should be wrapped in a heat-sinking material such as a wet cloth.

CAUTION When brazing tubing sets to the service valves, a brazing shield must be used to prevent damage to the painted unit surface.

PROVIDE SAFETY RELIEF—A fusible plug is located in unit suction line; do not cap this plug. If local code requires additional safety devices, install as directed.

Step 4 — Make Electrical Connections

CAUTION Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation will invalidate any applicable Carrier warranty.

WARNING Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to the unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with NEC, ANSI/NFPA (American National Standards Institute/National Fire Protection Association) 70, and local electrical codes. Failure to follow this warning could result in the installer being liable for personal injury to others.

POWER WIRING—Unit is factory-wired for voltage shown on nameplate. Provide adequate, fused disconnect switch within sight of unit, readily accessible but out of reach of children. Provision for locking the switch open (off) is advisable to prevent power from being turned on while unit is being serviced. Disconnect switch, fuses, and field wiring must be in compliance with NEC and applicable local codes. Use minimum 60 C wire for field power connection. Route power wires through opening in the unit side panel and connect in unit control box. Unit must be grounded. CONTROL CIRCUIT WIRING — See Electrical Data Table and unit label diagram for field-supplied wiring details. Route control wire through opening in the unit side panel to connection in unit control box. NOTE: Use no. 10 AWG (American Wire Gage) insulated wire NOTE: Operation of unit on improper line voltage constitutes abuse and could affect Carrier warranty. See Table7. Do not install unit in system where voltage may fluctuate above or below permissible limits. See Table 7 for recommended fuse sizes. When making electrical connections, provide clearance at unit for refrigerant piping connections.

WARNING Before performing service or maintenance, be sure the indoor unit main power switch is off and indoor blower has completely stopped. Failure to do so may result in electrical shock or injury from rotating fan blades.

CONNECTIONS TO DUCT-FREE FAN COIL UNITS — The 38HD units are designed for easy match-up to FB4A Fan Coil, 42TX Fan Coil,40GKX Cealling Cassette and 42S/HD Free Standing fan coils. See wiring diagrams page 9 – 11.

6

START-UP Preliminary Checks

1. Check that all internal wiring connections are tight and that barriers, covers, and panels are in place. 2. Make certain field electrical power source agrees with unit nameplate rating. 3. Open all service valves.

Leak Test— Field piping and fan coil must be leak tested by pressure method described in Carrier Standard Service Techniques Manual, Chapter 1, Section 1-6. Use R-22 at approximately 25 psig backed up with an inert gas to a total pressure not to exceed 245 psig.

Evacuate and Dehydrate— Field piping and fan coil must be evacuated and dehydrated by either of the methods described in Carrier Standard Service Techniques Manual, Chapter 1, Section 1-7.

Charge System — Release factory charge into system by opening (backseating) liquid and suction line service valves. Add charge amount as required for the total system. Refer to separate indoor unit installation instructions for the required total system charge when connected to the indoor unit.

PERCENTAGE DECREES IN CAPACITY DUE TO

To Start Unit NOTE: When using in conjunction with FB4A Fan Coil, 42TX Fan Coil,40GKX Ceiling Cassette and 42S/HD Free Standing fan coils., refer to start-up instructions included with fan coil for correct start-up procedures. Be sure that field disconnect is closed. Set room thermostat below ambient temperature. Operate unit for 15 minutes, then check system refrigerant charge. Unit compressor starts after a 5-minute delay if equipped with accessory Time Guardt II device.

Table 6 - SYSTEM OPERATING CONDITIONS TEMPERATURE CONDITIONS LIMITS

Maximum Cooling Ambient (F) 125 Minimum Cooling Ambient (F) (without accessory low-ambient kit) 55

Minimum Cooling ambient (F) (with accessory low-ambient kit) 35

Saturated Suction Temperature Range Minimum (F) / Maximum (F) 20 / 55

Saturated Condensing Temperature Range Minimum (F) / Maximum (F) 60 / 150

Maximum Compressor Discharge Temperature (F) 275

Minimum Discharge Superheat (F) 60 NOTE: For system controls see Electrical Data.

SERVICE

WARNING Before performing recommended maintenance, be sure unit main power switch is off. Failure to do so may result in electrical shock or injury from rotating fan blade.

Outdoor Fan— A reinforced wire mount holds the outdoor fan assembly in place.

Compressor Pressure Relief Valve — Valve is located in compressor. Relief valve opens at a pressure differential of approximately 450 ± 50 psig between suction (low side) and discharge (high side) to allow pressure equalization. Internal Current and Temperature Sensitive Overload— Control resets automatically when internal compressor motor temperature drops to a safe level (overloads may require up to 45 minutes to reset). When an internal overload is suspected of being open, check by using an ohmmeter or continuity tester. If necessary, refer to Carrier Standard Systems Techniques Manual, Chapter 2, for complete information.

Pumpdown Procedure— The system may be pumped down in order to make repairs on low side without losing complete refrigerant charge. To pumpdown: 1. Attach pressure gage to suction service valve gage port. 2. Frontseat the liquid line valve.

CAUTION The 38HDL unit coils hold only the factory-designated amount of refrigerant. Additional refrigerant may cause units to relieve pressure through compressor internal pressure relief valve (indicated by sudden rise of suction pressure) before suction pressure reaches 5 psig. If this occurs, shut off unit immediately, then frontseat the suction valve and remove and recover excess refrigerant following accepted practice.

3. Start unit and run until suction pressure reaches 5 psig. 4. Shut unit off and frontseat suction valve. 5. Depressurize low side of unit and recover refrigerant following accepted practice.

Loss of Charge Pressure Switch —This switch, mounted on the suction line, has fixed non-adjustable settings. To check pressure switch, attach pressure gage to suction service valve gage port. Slowly close liquid shutoff valve and allow compressor to pump down. Do not allow compressor to pump down below 2 psig. Compressor should shut down when suction pressure drops to cutout pressure in Table 2, and should restart when pressure builds up to cut-in pressure shown in Table 2. High Pressure Switch —This switch, mounted on the discharge line, has fixed non-adjustable settings & auto reset. To check pressure switch, attach pressure gauge to

MAXIMUM LINE LENGTHS

UNITMAXIMUM

EQUIVALENTFT

MAXIMUM LIFT— FAN COIL

BELOWCONDENSING

UNIT

MAXIMUM LIFT— FAN COIL

ABOVECONDENSING

UNIT38HK 50 30* 30*

*Maximum distance permitted is 30 ft from lowestsystem component to highest system component. Forlonger line application please refer to appendix A.

7

compressor discharge service port, block condenser coil, monitor pressure till compressor trips, remove blockage and observe at which pressure compressor restarts.

CAUTION If the compressor does not trip at the cut-out pressure (450 psig), remove the blockage immediately and contact your local Carrier service center.

Service Valves —The service valves in the outdoor unit come from the factory frontseated. This means the refrigerant charge is isolated from the line-set connection ports. To prevent damage to the valve, use a wet cloth or other acceptable heat sink material on the valve before brazing. The service valves must be backseated (turned counterclockwise until seated) before the service port caps can be removed and the hoses of the gage manifold connected. In this position, refrigerant has access from the through outdoor and indoor unit. The service valve cannot be field repaired; only a complete valve or valve stem seal and service port caps are available for replacement. MAINTENANCE

WARNING Before performing recommended maintenance, be sureunit main power is off. Failure to do so may result inelectrical shock or injury from rotating fan blades.

Lubrication COMPRESSOR—Compressor contains factory oil charges; replace oil when lost. See Table 1 for oil recharge and refer to Carrier Standard Service Techniques Manual, Chapter 1, pages 1 to 21 for oil recharging procedure. Cleaning Coils — Coil should be washed out with water or blown out with compressed air. Note that the blowthru design causes dirt and debris to build up on the inside of the coils. Clean coil annually or as required by location and outdoor air conditions. Inspect coil monthly and clean as required. Fins are NOT continuous through coil sections. Dirt and debris may pass through the first section, become trapped between the rows of fins, and restrict condenser airflow. Use a flashlight to determine if dirt or debris has collected between coil sections. Clean coil as follows: 1. Turn off unit power. 2. Use a garden hose or other suitable equipment to flush coil from the outside to remove dirt. Be sure to flush all dirt and debris from drain holes in the base of unit. Fan motors are waterproof.

WARNING Do not use harsh chemicals to clean the coils, use only water, compressed air or Carrier approved coil cleaners.

16

Typical Wiring Schematic 38HK 18-36- 50Hz

220-240V/1Ph 24V Control

220-240V/1Ph 220V Control

17

400V/3Ph 24V Control

400V/3Ph 220V Control

Typical Wiring Schematic 38HK- 48-60 50Hz

18

Typical Wiring Schematic 38HK- 70 50Hz

400V/3Ph 24V Control

19

Typical Wiring Schematic Heat Pump 38HQ18-24

38H

K/H

Q

Typical Wiring Schematic 38HK 18-36- 60Hz

220-240V/1Ph 24V Control

220-240V/1Ph 220V Control

16

Typical Wiring Schematic 38HK- 48-70- 60Hz

220V/1Ph 24V Control

220V/1Ph 220V Control

38H

K/H

Q

17

38H

K/H

Q

Typical Wiring Schematic 38HK- 48-70- 60Hz – Cont

220V/3Ph 24V Control

220V/3Ph 220V Control

18

Typical Wiring Schematic Heat Pump 38HQ18-24

38H

K/H

Q

19

12

START-UP CHECKLIST

13

Outdoor Unit: Model Number ________________ Serial Number ____________________ Indoor Unit: Model Number __________________ Serial Number ____________________ PRE-START-UP Outdoor Unit IS THERE ANY SHIPPING DAMAGE? (Y/N) ___________________ IF SO, WHERE? ____________________________________________ WILL THIS DAMAGE PREVENT UNIT START-UP? (Y/N) _____ CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT DATAPLATE? (Y/N) _____ HAS THE GROUND WIRE BEEN CONNECTED? (Y/N) _____ HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (Y/N) _____ ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (Y/N) _____ ARE ALL TERMINALS TIGHT? (Y/N) _____ Piping ARE REFRIGERANT LINES CONNECTED TO SERVICE VALVE SETS? (Y/N) _____ ARE CONTROL POWER LINES CONNECTED TO CONTROL POWER TERMINAL BLOCK? (Y/N) _____ ARE TERMINALS SNUG IN THE HOUSINGS ? (Y/N) _____ ARE SERVICE VALVES OPENED AND BACKSEATED? (Y/N) _____ ARE STEM VALVES INSTALLED AND SNUG? (Y/N) _____ HAVE ALL REFRIGERANT CONNECTIONS AND PIPING JOINTS BEEN CHECKED FOR LEAKS? (Y/N) ______ Indoor Fan Coil Unit Piping CHECK TO BE SURE ACCURATER DEVICE IS INSTALLED IN FAN COIL UNIT. _____ HAVE REFRIGERANT CONNECTIONS BEEN CHECKED FOR LEAKS? (Y/N) _____ IS CONDENSATE LINE CONNECTED? (Y/N) _____ DOES CONDENSATE LINE DRAIN FREELY? (Y/N) _____ Controls ARE CONTROL POWER LINES AND CONTROL CABLES ROUTED SEPARATELY (NOT IN SAME CONDUIT AND NOT IN SAME MULTI-CONDUCTOR CABLE)? (Y/N) _____ ARE CONTROL WIRES CONNECTED TO THE SAME CIRCUIT AS ASSOCIATED REFRIGERANT LINES? (Y/N) _____ CHECK MOUNTING OF SUBBASE TO WALL, IS IT TIGHT (DO NOT APPLY EXCESSIVE FORCE TO MOUNTING SCREW)? (Y/N) _____

Units with Wireless Remote Controller CHECK MOUNTING OF INTERFACE BOARD; ARE STANDOFFS USED (TO MAINTAIN FIXED SEPARATION ABOVE SHEET METAL CHASSIS)? (Y/N) _____ CHECK CONNECTION OF POWER SUPPLY PLUG (2-CIRCUIT MOLEX PLUG) ON INTERFACE BOARD; IS THE BLUE LEAD CONNECTED TO PIN 1? (Y/N) _____ ARE FRESH BATTERIES INSTALLED PROPERLY IN THE FAN COIL UNIT REMOTE CONTROLLER (PER DIAGRAM IN CONTROLLER)? (Y/N) _____ DOES THE REMOTE CONTROLLER BACKLIGHT ILLUMINATE WHEN THE BUTTON ON THE BACK OF THE REMOTE CONTROLLER IS PRESSED? (Y/N) _____ Fan System DOES THE FAN ROTATE FREELY? (Y/N) _____ ARE AIR FILTERS IN PLACE? (Y/N) _____ Power Supply DOES THE POWER SUPPLY MATCH THE FAN COIL UNIT DATA PLATE? (Y/N) IS GROUND WIRE CONNECTED? (Y/N) _____

14

START-UP A. Check Indoor Fan Operation Under Ceiling Fan Coil Units SELECT FAN MODE, THEN INITIATE TEST SEQUENCE. DOES THE FAN COIL UNIT START AT LOW SPEED, THEN SHIFT TO MEDIUM SPEED, AND THEN SHIFT TO HIGH SPEED? (Y/N) _____

Cassette Fan Coil Units POSITION SELECTOR SWITCH AT SUBBASE IN EACH FAN SPEED SETTING IN SEQUENCE. DOES THE FAN COIL UNIT CHANGE SPEEDS PER SWITCH SETTING? (Y/N) _____ B. Start System Operation at the Fan Coil Unit SELECT COOLING MODE AND ADJUST SET POINT TO BE BELOW CURRENT ROOM TEMPERATURE. OBSERVE OPERATION OF OUTDOOR CONDENSING UNIT: DOES COMPRESSOR START (AFTER INITIAL TIME DELAY) AND RUN? (Y/N) _____ DOES OUTDOOR FAN RUN OR CYCLE ACCORDING TO SPACE REQUIREMENTS? (Y/N) _____ DE-SELECT COOLING MODE AT INDOOR FAN COIL UNIT, AND RECORD ALL INFORMATION BELOW: AFTER AT LEAST 15 MINUTES RUNNING TIME, RECORD THE MEASUREMENTS BELOW.COMPRESSOR AMPS (L1/L2/L3) __________ OIL PRESSURE __________ VAPOR LINE PRESSURE __________ VAPOR LINE TEMP __________ DISCHARGE PRESSURE __________ DISCHARGE LINE TEMP __________ ENTERING OUTDOOR-AIR TEMP __________ LEAVING OUTDOOR-AIR TEMP __________ FAN COIL UNIT INDOOR ENTERING-AIR dB (dry bulb) TEMP __________ INDOOR ENTERING-AIR WB (wet bulb) TEMP __________ INDOOR LEAVING-AIR dB TEMP __________ INDOOR LEAVING-AIR WB TEMP __________

15

Appendix

16

LONG-LINE GUIDELINE

Table 1 – REQUIRED FIELD INSTALLED ACCESSORIES FOR AIR CONDITIONERS AND HEAT PUMP

ACCESSORYREQUIRED FOR

LOW-AMBIENT APPLICATIONS(BELOW 55°F)

REQUIRED FORLONG-LINE

APPLICATIONS*(OVER 50 FT)

REQUIRED FORSEA COAST

APPLICATIONS(WITHIN 2 MILES)

Crankcase Heater Yes Yes No Evaporator Freeze Thermostat Yes No No

Winter Start Control Yes† No No Accumulator No No No

Compressor Start Assist Capacitor and Relay Yes Yes No

Low Ambient Controller,MotorMaster™ Control,

orLow-Ambient Pressure Switch

Yes No No

Wind Baffle See Low-Ambient Instructions No No Coastal Filter No No Yes Support Feet Recommended No Recommended

Liquid-Line Solenoid Valveor

Hard-Shutoff TXVNo

See Long-Line Application Guideline

No

Ball-Bearing Fan Motor Yes‡ No No Isolation Relay Yes** No No

*For tubing line sets between 50 and 175 ft, refer to Residential Split-System Long-Line Application Guideline. †Only when low-pressure switch is used. ‡Required for Low-Ambient Controller (full modulation feature) and MotorMaster™ control only. ** Required on Heat Pumps only.

This Long-Line Application Guideline applies to all Carrier residential air conditioner and heat pump split systems that have a nominal capacity of 18,000 to 60,000 Btuh. This guideline provides required system changes and accessories necessary for any residential product having piping requirements greater than 50 ft or installations where indoor unit is located above outdoor unit. This guideline is intended to cover applications outside the standard Installation Instructions. This guideline is for standard, single-speed products. For applications involving 2-speed products, refer to Step 6 first. NOTE: The presale literature for outdoor unit must be referred to in conjunction with this guideline.

Step 1—Approved Systems Any residential indoor/outdoor unit combination listed in the outdoor unit presale literature is an approved system, EXCEPT the following: • Indoor coils with capillary-metering devices • All equipment less than nominal 18,000 Btuh • All 1/4-in. and 3/16–in. liquid-line applications

• Any indoor furnace coil/fan coil not listed in outdoor unit presale literature • Any application which has interconnecting tubing with an equivalent length greater than 175 ft

Step 2—Interconnecting Tubing Sizing Table 2 lists recommended interconnecting vapor-line diameters for equivalent total-line lengths. All residential split systems installed in long-line applications must use only 3/8-in. liquid lines. Equivalent line length equals the linear length (measured) of interconnecting vapor tubing plus losses due to elbows. (See Table 3 and Fig. 3.) Liquid lines larger than 3/8-in. OD greatly increase charge quantity of the system. Excessive charge increases risk of migration and compressor damage. Table 2 provides the estimated percentage of nominal cooling-capacity losses based on the standard, required vapor line size versus what is selected for the long-line application. Since the vapor line is the discharge line in heating mode, losses are minimal. Calculate the linear length of vapor tube required, adding any losses for the total number of elbows for application. (See Table 6.) Using this equivalent length, select desired

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vapor-line size from Table 2. Subtract the nominal percentage loss from outdoor-unit presale-literature Detailed Cooling Capacities data for the given indoor/outdoor combination. Reference all notes of Table 2. NOTE: When specifying vapor-line insulation, be aware of the following standard practice: All standard accessory-tubing kits are supplied with 3/8-in. insulation on vapor line. For minimal capacity loss in long-line application, 1/2-in. insulation should be specified. For reference only, the close cell insulation material specified for accessory tubing kits is a compound of vinyl, neoprene, or nitrile blends of these polymers. Performance requirements include thermal range of 0° F to 200°F (-17.8° C to 93° C) and a maximum thermal conductivity of 0.28. NOTE: Special consideration must be given to isolating interconnecting tubing from building structure. Isolate tubing so that vibration or noise is not transmitted into structure.

Step 3—Metering Device Sizing The metering device for a long-line application must be flexible enough to compensate for frictional losses due to long refrigerant lines and installed system design (indoor coil above or below outdoor unit.) The piston or TXV provides such flexibility. The piston should be changed for both indoor coil and outdoor heat pump unit, depending on system configuration and line length. Tables 4 and 5 provide necessary changes for a given application. Use Tables 4 and 5 when selecting correct piston size. Outdoor unit presale literature must be consulted to determine metering devices specified for standard applications. After determining standard application piston size(s), refer to Tables 4 and 5 as they relate to system design (outdoor unit above or below indoor unit) per equivalent length of tubing. NOTE: If total equivalent horizontal length is 100 ft or longer, both indoor and outdoor pistons must be increased 1 full piston size, in addition to changes required by Tables 4 and 5. After finding appropriate change in piston size, add or subtract the change from original piston number. If piston size is decreased,round new piston number down to nearest common piston number found in Table 6. If piston size is increased, round new piston number up to nearest common piston number found in Table 6.

Step 4—Liquid-Line Solenoid And Tubing Configuration There are 2 types of liquid-line solenoids: 1 for single-flow applications and the other for bi-flow applications. The purpose of having 2 solenoids is to minimize the valve internal-pressure drop in accordance with refrigerant flow direction and liquid migration to the compressor. The bi-flow solenoid is designed to have minimal refrigerant-pressure drop in either flow direction, which makes it suitable for heat pump usage. Refer to Table 7 for liquid-line solenoid kit part numbers. NOTE: When installing a liquid-line solenoid, the system may require a minimum 60-va low-voltage transformer. Each type of solenoid has an indicator flow arrow stamped on the valve body. When solenoid is closed (not energized) and pressure is applied in direction of flow arrow, complete shutoff occurs. If pressure is applied against direction of flow arrow, leakage through valve occurs. When determining proper installation of valve within liquid line, 2 considerations must be made: 1. Direction of flow arrow 2. Where solenoid is installed in system. TXVs can only be substituted for liquid-line solenoids in singleflow air conditioning systems. Bi-flow TXVs allow liquid migration to coldest point during off cycles, which could allow liquid into compressor. Fig. 2 through 5 detail proper installation of liquid-line solenoid and provide applications where TXVs may be substituted. Reference all notes of the appropriate figures.

EXAMPLE: An 042 size heat pump is 75 ft above an 042 size fan coil. The 042 size heat-pump presale literature specifies a size 80 indoor piston and size 63 outdoor piston. To establish correct indoor piston size for a 75 ft vertical separation, refer to Table 4. For a 75 ft equivalent line length, the piston change is -5. Therefore subtract 5 from the original indoor piston size of 80: 80 – 5 = 75 Table 6 provides common piston sizes. In this instance, 75 is not listed, therefore round DOWN to next piston size, which would be 74. To establish correct outdoor piston size for a 75 ft vertical separation, refer to Table 5. For a 75 ft equivalent line length, the piston change is +4. Therefore add 4 to the original outdoor piston size of 63: 63 + 4 = 67Since 67 is listed in Table 6, that is the piston which should be used. If a 67 size piston were not listed, it would be necessary to round UP to next piston size.

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Step 5—Charging Information Weigh in appropriate refrigerant charge, then use the standard practices of superheat-charging method for piston applications and subcooling-charging method for TXV applications to confirm correct charge. The standard charging methods can be found on outdoor unit-information plate, in unit Installation Instructions, or in the Service Manual. Since total system charge is increased for long-line applications, it may be necessary to calculate the additional refrigerant charge. Since long-line applications only involve 3/8-in. liquid lines, the additional refrigerant charge required is 0.6 oz of Refrigerant 22 (R-22) per ft of 3/8-in. liquid line over 15 ft.

The rating-plate charge of a given outdoor unit is for a standard application of 15 ft of interconnecting tubing. The rating-plate charge can be found on outdoor unit-rating plate or in outdoor unit-presale literature. Long-line applications do not require additional oil charge.

Table 2 —Estimated Percentage of Nominal Cooling-Capacity Losses*EQUIVALENT LINE LENGTH (FT) UNIT NOMINAL

SIZE (BTUH) LONG-LINE

VAPOR-LINE DIAMETER (IN.)** 50 75 100 125 150 175

5/8 5 7 9 12 12 14 18,000 3/4 1 3 4 5 5 7 5/8 6 9 13 16 19 22 24,000 3/4 0 1 1 2 3 4 5/8 6 8 10 13 15 17 30,000 3/4 2 3 4 5 6 7 3/4 7 10 14 17 21 NR 36,000 7/8 2 4 6 8 10 11 3/4 7 10 13 17 20 23 7/8 3 4 6 7 8 10 42,000

1-1/8 0 0 1 1 2 2 3/4 10 14 18 22 NR NR 7/8 4 6 7 9 11 13 48,000

1-1/8 0 0 1 1 2 2 7/8 7 9 11 14 16 19 60,000

1-1/8 1 2 2 3 3 4 *The estimated percentage of cooling capacity that must be subtracted from the Detailed Cooling Capacities data specified in outdoor unit-presale literature for any given indoor/outdoor combination. **Vapor-line diameter that may be selected for a long-line application. If smaller vapor lines are selected but not specified within the table, large capacity losses will occur and defrost capabilities will be reduced. If larger vapor lines are selected but not specified within the table, refrigerant oil return will be impaired due to velocity losses. N/R—Not recommended due to excessive loss of capacity.

Step 6—2–Speed Applications Outdoor units may be connected to indoor section using accessory tubing package or field-supplied refrigerant grade tubing or correct size and condition. In long-line applications, 2–speed units are handled basically the same way as the single-speed units. There are 2 major differences: 1. For tubing up to 100 ft: Liquid tube diameters and refrigerant connection diameters for all sizes are 3/8 in.

Vapor tube diameter for the 036 and 048 is 7/8 in.; 060 is 1–1/8 Vapor refrigerant connection diameter for all sizes is 7/8 in. DO NOT INSTALL EQUIVALENT INTERCONNECTING TUBING LENGTHS GREATER THAN 100 FT. 2. Do not increase or decrease tubing sizes. For other applications see the previous sections under Long-Line Guidelines.

EXAMPLE: To calculate additional charge required for a 25–ft line set: 25 ft – 15 ft = 10 ft X 0.6 oz/ft = 6 oz of additional charge

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Fig.1—Tube Bend Losses

Table 3—Fitting Losses in Equivalent Ft REFERENCE DIAGRAM IN FIG. 1 TUBE SIZE OD

(IN.) A B C 5/8 1.6 1.0 0.8 3/4 1.8 1.2 0.9 7/8 2.0 1.4 1.0

1-1/8 2.6 1.7 1.3

B

90° STD

A

45° STD

C

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Table 4 - Calculation of Indoor Piston No. OUTDOOR UNIT ABOVE INDOOR

FT PISTON CHANGE 0-25 0

26-50 -351-75 -5

76-100 -7101-125 -9126-150 -10

OUTDOOR UNIT BELOW INDOORFT PISTON CHANGE

0-25 026-50 +4

Table 5 — Calculation of Outdoor Piston No. OUTDOOR UNIT ABOVE INDOOR

FT PISTON CHANGE 0-50 0

51-75 +476-100 +6

101-125 +8126-150 +10

OUTDOOR UNIT BELOW INDOORFT PISTON CHANGE

0-50 0

Table 6 — Common Piston Sizes ACCURATER™ CHATLEFF ACCURATER™ CHATLEFF

— 32 65 65 — 33 67 67 35 35 — 68 — 36 70 70 — 37 — 71 38 38 73 73 — 39 — 74 40 40 76 76 — 41 78 78 42 42 80 80 — 43 — 81 — 45 82 82 46 — 84 84 — 47 86 86 49 49 88 88 51 51 — 89 52 52 90 90 — 53 — 92 55 55 93 93 57 57 96 96 59 59 98 98 61 61 101 101 — 62 104 104 63 63 109 —

Table 7—Liquid-Line Solenoid Kit Part NumbersTYPE OF VALVE PART NO.

Single Flow KAALS0101LLS Bi-Flow KHALS0101LLS

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175' MAX.

GROUND LEVEL

BASEMENT

Note: For Rotary Compressor,maximum length is 105'.

Fig. 2—Application with Air Conditioner Installed in a Horizontal Configuration

175' MAX.

GROUND LEVEL

BASEMENT

Note: For Rotary Compressor,maximum length is 105'.

Fig. 3—Application with Heat Pump Installed in a Horizontal Configuration

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HEAT PUMP ONLY

50' MAX.

GROUND LEVEL

TRAP

Note: For Rotary Compressor,maximum height is 30'.

Fig. 4-Application with Air Conditioner or Heat Pump Installed with Indoor Unit above Outdoor Unit

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HEAT PUMP ONLY

150' MAX. Note: For Rotary Compressor,maximum height is 90'.

Fig. 5—Application with Air Conditioner or Heat Pump Installed Above Indoor Unit

38HK-02 IOM 2011

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations