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38HDF018-036
Duct Free Condensing Units
38HDR018-060
Ducted Condensing Units
Installation, Start-Up and
Service Instructions
CONTENTS
Page
Puron® (R-410A) refrigerant systems operate at higher
SAFETY CONSIDERATIONS...................... 1
pressures than standard R-22 systems. Do not use R-22 ser-
INSTALLATION................................ 1-10
vice equipment or components on Puron refrigerant equip-
Step 1 — Complete Pre-Installation Checks ...... 1
ment. If service equipment is not rated for
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2 UNIT MODELS M OPERATING WT CHASSIS UNIT SIZE SIZE ABC D E F G H J K L N P 38HDF 38HDR in. mm lb kg (Reference) Unit Size Unit Size 5 018 / 15.88 166 75.3 8 1 15 9 7 3 1 5 1 15 2′-1 / ″ 3′-0 / ″ 1′-2 / ″ 1′-4″ 1′-11 / ″ 1′-5 / ″ 1′-5 / ″ 1′-10″ 1′-1″ 0′-6 / ″ 0′-11 / ″ 0′-2 / ″ 0′-6″ 8 16 16 16 16 8 8 4 16 5 018 018 0 024 / 15.88 176 79.8 8 (638.2) (938.2) (369.9) (406.4) (595.3) (436.6) (435) (559.1) (330.2) (168.3) (285.8) (75) (152.4) 38HDF 3 1 15 9 7 3 1 3 5 15 030 / 19.05 187 84.8 4 2′-7 /
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When more than 50 ft of interconnecting tubing and more Step 2 — Rig and Mount Unit than 30 ft of vertical lift is used, consult the residential long line MOUNTING ON GROUND — Mount unit on a solid, level application instruction guide. For long-line applications, inter- concrete pad. Position unit so water or ice from roof does not connecting lines over 100 ft must be installed with a liquid line fall directly onto unit. Accessory stacking kits can be used solenoid. A liquid line solenoid may al
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Only use factory specified liquid-line filter driers with rated working pressures less than 600 psig. NOTE: Do not install a suction-line filter drier in liquid line. To avoid damage while brazing, service valves should be MAKE PIPING SWEAT CONNECTIONS — Remove plastic wrapped with a heat-sinking material such as a wet cloth. caps from liquid and suction service valves. Use refrigerant grade tubing. Service valves are closed from the factory and are ready for brazing. After wrapping the service
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Table 1B — 38HDR018-060 Physical Data UNIT 38HDR 018 024 030 036 048 060 NOMINAL CAPACITY (Tons) 1.5 2.0 2.50 3.0 4.0 5.0 OPERATING WEIGHT (lb) 166 176 250 250 278 306 REFRIGERANT TYPE R-410A METERING DEVICE AccuRater (Located at Fan Coil) CHARGE (lb)* 6.3 6.5 10.0 8.9 12.0 12.2 OUTDOOR FAN Rpm/Cfm 840/1720 840/1720 850/3900 850/3900 850/3900 850/3900 Diameter (in.) 18 18 24 18 24 24 No. Blades 333 333 1 1 1 1 1 1 Motor (hp) / / / / / / 8 8 4 4 4 4 OUTDOOR COIL Face Area (sq ft) 5.8 7.3 12.1 12.
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NOTE: For wire runs up to 50 ft, use no. 18 AWG (American Step 4 — Make Electrical Connections Wire Gage) insulated wire. For 50 to 75 ft, use no. 16 AWG insulated wire. For over 75 ft, use 14 AWG insulated wire. NOTE: All wiring must conform to NEC and local codes. Unit cabinet must have an uninterrupted, unbroken electri- NOTE: Operating unit on improper line voltage constitutes cal ground to minimize the possibility of personal injury if abuse and could affect Carrier warranty. See Tables 2 a
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Table 2 — 38HDF Electrical Data VOLTAGE RANGE* COMPRESSOR OUTDOOR FAN MOTOR 38HDF MIN CKT FUSE/HACR V-PH-Hz UNIT SIZE AMPS BKR AMPS Min Max RLA LRA FLA NEC Hp kW Out 018 208/230-1-60 187 253 10.0 48.0 0.80 0.125 0.09 13.3 20 024 208/230-1-60 187 253 14.3 58.3 0.80 0.125 0.09 18.7 30 030 208/230-1-60 187 253 15.7 73.0 0.80 0.125 0.09 20.4 35 208/230-1-60 187 253 20.0 112.0 1.45 0.25 0.19 26.5 45 036 208/230-3-60 187 253 14.7 88.0 1.45 0.25 0.19 19.8 30 460-3-60 414 506 6.6 44.0 0.80 0.25 0.19 9.1
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Table 3 — 38HDR Electrical Data VOLTAGE RANGE* COMPRESSOR OUTDOOR FAN MOTOR 38HDR MIN CKT FUSE/HACR V-PH-Hz UNIT SIZE AMPS BKR AMPS Min Max RLA LRA FLA NEC Hp kW Out 018 208/230-1-60 187 253 10.0 48.0 0.80 0.125 0.09 13.3 20 024 208/230-1-60 187 253 14.3 58.3 0.80 0.125 0.09 18.7 30 030 208/230-1-60 187 253 15.7 64.0 1.45 0.25 0.19 21.1 35 208/230-1-60 187 253 15.7 77.0 1.45 0.25 0.19 21.1 35 036 208/230-3-60 187 253 10.4 88.0 1.45 0.25 0.19 14.5 20 460-3-60 414 506 6.3 38.0 0.80 0.25 0.19 8.7 1
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9 38HDF OPERATION SEQUENCE CALL FOR COOLING: 1. Control voltage from transformer to thermostat (24 v). 2. At thermostat 24 v is switched to “G” and “Y.” 3. 24 v from thermostat “G” energizes fan relay at indoor fan coil unit and indoor-fan motor runs. LEGEND 4. 24 v from thermostat “Y” energizes the contactor coil and the compressor and outdoor-fan motor will both run. C— Contactor, Compressor Terminal (Marked) 6. If the internal protection of the compressor or LPS or HPS open, the 24 v to conta
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10 38HDR OPERATION SEQUENCE CALL FOR COOLING: 1. Control voltage from transformer to thermostat (24 v). 2. At thermostat 24 v is switched to “G” and “Y.” 3. 24 v from thermostat “G” energizes fan relay at indoor fan coil and indoor-fan motor runs. LEGEND 4. 24 v from thermostat “Y” energizes the logic in the CLO, and the contactor coil, both at the outdoor unit. Compressor and outdoor-fan motor run. C— Contactor, Compressor Splice (Field) 6. If the internal protector of the compressor, HPS, or L
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START-UP Internal Current and Temperature Sensitive Overload — The control resets automatically when Preliminary Checks internal compressor motor temperature drops to a safe level 1. Check that all internal wiring connections are tight and (overloads may require up to 45 minutes to reset). When an that all barriers, covers, and panels are in place. internal overload is suspected of being open, check by using an 2. Field electrical power source must agree with unit name- ohmmeter or continuity te
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To troubleshoot: All units are shipped with the refrigerant charge listed on the nameplate. See indoor unit Installation Instructions for ad- 1. Apply voltmeter across crankcase heater leads to see if ditional charge requirements. heater voltage is on. Do not touch heater. Carefully feel area around crankcase heater; if warm, crankcase heater NOTE: For 38HDF units only, charge to nameplate. See the is functioning. indoor unit owner’s manual for any additional charge requirements. 2. With power o
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Table 4 — Pressure vs. Temperature Chart — Puron® Refrigerant (R-410A) PRESSURE TEMPERATURE PRESSURE TEMPERATURE PRESSURE TEMPERATURE PRESSURE TEMPERATURE PRESSURE TEMPERATURE PRESSURE TEMPERATURE PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F 12 –37.7 114 37.8 216 74.3 318 100.2 420 120.7 522 137.6 14 –34.7 116 38.7 218 74.9 320 100.7 422 121.0 524 137.9 16 –32.0 118 39.5 220 75.5 322 101.1 424 121.4 526 138.3 18 –29.4 120 40.5 222 76.1 324 101.6 426 121.7 528 138.6 20 –26.9 122 41.3 224 76.7
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Table 5 — Subcooling Charging Table Compressor Lockout Switch — The 38HDR units are provided with a compressor lockout protective device. If REQUIRED LIQUID LINE the compressor shuts down due to any safety device, a current TEMPERATURE (F) LIQUID PRESSURE loop monitoring the compressor current senses no current flow. AT SERVICE VALVE Required Subcooling The unit will lock out until the control power is interrupted to (psig) Temperature (F) reset the lockout. Determine the reason for the safety t
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Fig. 9 — Troubleshooting the Cooling Cycle 15
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Copyright 2006 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 02-38HD0001-SI Printed in U.S.A. Form 38HD-4SI Pg 16 2-06A 1-06 Replaces: 38HDC-3SI Book 1 4 Tab 3e 2f
