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38AQS008
Air-Cooled Split System Heat Pump
50/60 Hz
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS .................1
Before installing or servicing system, always turn off
main power to system. There may be more than one dis-
INSTALLATION ............................1-9
connect switch. Electrical shock can cause personal
Step 1 — Complete Pre-Installation Checks ..1
injury.
UNCRATE UNIT
INSPECT SHIPMENT
CONSIDER SYSTEM REQUIREMENTS
Step 2 — Rig and Mou
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Table 1A — Physical Data (English) Table 1B — Physical Data (SI) UNIT 38AQS008 60 Hz 50 Hz UNIT 38AQS008 60 Hz 50 Hz OPERATING WEIGHT (lb) OPERATING WEIGHT (kg) Aluminum Coils (Standard) 540 594 Aluminum Coils (Standard) 245 270 Copper Coils (Optional) 608 662 Copper Coils (Optional) 276 299 RIGGING WEIGHT (lb) RIGGING WEIGHT (kg) Aluminum Coils (Standard) 590 644 Aluminum Coils (Standard) 268 292 Copper Coils (Optional) 658 712 Copper Coils (Optional) 298 323 REFRIGERANT* R-22 REFRIGERANT* R-22
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Table 2 — Refrigerant Piping Sizes NOTE: Carrier recommends part number EF23JS214 (Sporlan 5 7 model CB14S2, ⁄8-in. ODF/ ⁄8-in. ODM) available from the LINEAR LENGTH OF PIPING — ft (m) Replacement Components Division of Carrier Corporation. This solenoid requires field supplied Sporlan MKC-2 coils. 0-25 25-50 50-75 75-100 (0-7.6) (7.6-15.2) (15.2-22.9) (22.9-30.5) UNIT Wire the solenoid in parallel with the compressor con- 38AQS Line Size (in. OD) tactor coil. L S L S LSLS Install the LLSV near t
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WEIGHT CHART (WITH ALUMINUM COIL) WEIGHT CHART (WITH COPPER COIL) UNIT UNIT UNIT W/ALUMINUM COIL W/COPPER COIL Std Unit Corner W Corner X Corner Y Corner Z Std Unit Corner W Corner X Corner Y Corner Z 38AQS008 Dim. A Dim. B Dim. A Dim. B Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg 1 3 1-8 1-5 1-9 ⁄2 1-4 ⁄4 60 Hz 540 245 132 60 100 45 133 60 175 80 608 276 160 73 117 53 142 64 189 86 [508.0] [431.8] [546.0] [425] 1 3 1-6 1-7 1-7 ⁄2 1-6 ⁄4 50 Hz 594 270 114 52 114 5
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Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate (also see Table 4). Voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 4, Note 2, to determine the percent voltage imbalance. Operation on improper line voltage or excessive phase im- balance constitutes abuse and may cause damage to elec- trical components. Such operation would invalidate any ap- plicable Carrier warranty. ACCESSORY
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LEGEND NOTES: 1. All piping must follow standard refrigerant piping techniques. Re- NEC — National Electrical Code fer to Carrier System Design Manual for details. TXV — Thermostatic Expansion Valve 2. All wiring must comply with the applicable local and national codes. *Accessory item. 3. Wiring and piping shown are general points-of-connection guides †Field supplied. only and are not intended for, or to include all details for, a specific installation. 4. Liquid line solenoid valve (solenoid dr
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Table 4 — Electrical Data VOLTAGE RANGE COMPRESSOR OFM POWER SUPPLY MINIMUM DISCONNECT UNIT NOMINAL VOLTAGE MAX FUSE OR 38AQS (V-Ph-Hz) Min Max RLA LRA FLA MCA FLA LRA HACR BRKR AMPS 208/230-3-60 187 254 31.5 160 3.1 42.5 50 45 177 460-3-60 414 508 15.7 80 1.4 21.0 25 25 89 008 220-3-50 198 242 39.7 198 3.1 52.7 70 55 205 400-3-50 360 440 19.9 99 1.4 26.3 35 30 106 LEGEND Example: Supply voltage is 460-3-60. FLA — Full Load Amps AB = 452 v HACR — Heating, Air Conditioning and Refrigeration BC =
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→ Table 5A — Accessory Electric Heater Data (60 Hz) UNIT HEATER HEATER V-PH-Hz NOMINAL kW MCA* MOCP* 40RMQ PART NO. AMPS CAELHEAT001A00 240-3-60 12.0 25.6 30 CAELHEAT002A00 480-3-60 5 6.0 12.3 15 CAELHEAT003A00 575-3-60 5.0 11.9 15 CAELHEAT004A00 240-3-60 24.1 40.7 50 CAELHEAT005A00 480-3-60 10 12.0 19.8 25 CAELHEAT006A00 575-3-60 10.0 18.1 25 CAELHEAT007A00 240-3-60 36.0 55.7 80 008 CAELHEAT008A00 480-3-60 15 18.0 27.4 40 CAELHEAT009A00 575-3-60 15.1 24.4 35 CAELHEAT010A00 240-3-60 60.1 85.8 12
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LEGEND Fig. 6 — Fusible Plug Locations C— Cooling LLSV — Liquid Line Solenoid H— Heating Valve HR — Heater Relay SUPL — Supplemental IFC — Indoor Fan Contactor TB — Terminal Block → Fig. 9 — Control Wiring Connections CORNER RACEWAY THERMOSTAT POWER WIRING POST FIELD CONNECTION CONNECTIONS LEGEND TXV — Thermostatic Expansion Valve NOTE: The 8 o’clock position is shown above. Fig. 7 — TXV Sensing Bulb Location Fig. 10 — Field Control Wiring Raceway LEGEND C— Contactor NEC — National Electrical Co
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START-UP Preliminary Checks 1. Check that all internal wiring connections are tight and that all barriers, covers, and panels are in place. 2. Field electrical power source must agree with unit name- plate rating. 3. Ensure all service valves are open. Ensure all compressor service valves are backseated. 4. Verify that compressor holddown bolts have been loos- ened and that flat/snubber washers can be rotated by fin- ger pressure (snug, but not tight). 5. Verify compressor crankcase heater is secu
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Should room temperature continue to fall, circuit R-W is Cleaning — Inspect unit interior at the beginning of each made through second-stage thermostat bulb. If optional elec- cooling season and as operating conditions require. tric heat package is used, a relay is energized, bringing on OUTDOOR COIL — Inspect coil monthly. Clean outdoor supplemental electric heat. When thermostat is satisfied, con- coil annually and as required by location or outdoor-air tacts open, deenergizing contactor and re
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5. Remove crankcase heater from compressor base. 6. Remove compressor holddown bolts and lift compres- sor off basepan. 7. Remove compressor from unit. 8. Clean system. Add new liquid line filter drier (biflow type). 9. Install new compressor and position in unit. Connect suc- tion and discharge lines to compressor. Connect high pres- sure switch. Ensure that compressor holddown bolts are in place. Connect wiring. Install crankcase heater. 10. Evacuate and recharge unit. 11. Restore unit power. Co
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Fig. 16 — Cooling Mode Operation Fig. 17 — Heating Mode Operation 13
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14 TROUBLESHOOTING CHART, COOLING CYCLE LEGEND TXV — Thermostatic Expansion Valve
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15 TROUBLESHOOTING CHART, HEATING CYCLE LEGEND N.C. — Normally Closed
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Copyright 1995 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 111 Catalog No. 533-887 Printed in U.S.A. Form 38AQS-4SI Pg 18 801 6-95 Replaces: 38AQS-3SI Tab 5a 5a
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START-UP CHECKLIST A. Preliminary Information OUTDOOR: MODEL NO. SERIAL NO. INDOOR: AIR HANDLER MANUFACTURER MODEL NO. SERIAL NO. ADDITIONAL ACCESSORIES B. 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? (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?
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C. Start-Up CHECK INDOOR-FAN SPEED AND RECORD. CHECK OUTDOOR-FAN SPEED AND RECORD. AFTER AT LEAST 15 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS: COOLING HEATING OIL PRESSURE SUCTION PRESSURE SUCTION LINE TEMP DISCHARGE PRESSURE DISCHARGE LINE TEMP ENTERING OUTDOOR-AIR TEMP LEAVING OUTDOOR-AIR TEMP INDOOR ENTERING-AIR DB (dry bulb) TEMP INDOOR ENTERING-AIR WB (wet bulb) TEMP INDOOR LEAVING-AIR DB TEMP INDOOR LEAVING-AIR WB TEMP COMPRESSOR AMPS (L1/L2/L3) / / NOTES: Copyright 1995 Car
