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COOLING
38HDL018-060
Light Commercial Condensing Units
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS...................1
INSTALLATION ..............................1-7
Step 1 — Complete Pre-Installation
Checks ....................................1
• UNPACK UNIT
• INSPECT SHIPMENT
• CONSIDER SYSTEM REQUIREMENTS
Step 2 — Rig and Mount Unit .................3
• MOUNTING ON GROUND
• MOUNTING ON ROOF
• RIGGING
Step 3 — Complete Refrigerant Piping
Connections ....
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2 OPERATING UNIT ABC D E F G H J K L M WEIGHT SIZE 38HDL ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm ft-in. mm lb kg 1 15 9 7 3 1 1 5 1 5 018 2-1 ⁄8 638.2 3-0 ⁄16 938.2 1-2 ⁄16 369.9 1-4 406.4 1-11 ⁄16 595.3 1-5 ⁄16 436.6 1-5 ⁄2 444.5 1-8 ⁄8 511.2 1-1 330.2 0-6 ⁄8 168.3 0-11 ⁄4 285.8 0-0 ⁄8 15.88 130 58.9 1 15 9 7 3 1 1 3 5 5 024 2-1 ⁄8 638.2 3-0 ⁄16 938.2 1-2 ⁄16 369.9 1-4 406.4 1-11 ⁄16 595.3 1-5 ⁄16 436.6 1-5 ⁄2 444.5 1-8 ⁄8 51
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Step 2 — Rig and Mount Unit MOUNTINGONGROUND—Mountunitonasolid,level concrete pad. Position unit so water or ice from roof does not fall directly into unit. Field-fabricated 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 tiedownboltsshouldbeusedandfastenedthroughslotspro- vided in unit mounting feet. MOUNTINGONROOF—Mountunitonlevelplatformor frameatleast6in.(154mm)aboveroofsurface.Isolateunit and tubing f
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withawetcloth,thetubingsetcanbebrazedtotheservice in compliance with NEC (U.S.A. Standard) and applicable valveusingeithersilverbearingornon-silverbearingbraz- local codes. Use minimum 60 C wire for field power ing material. Consult local code requirements. Refrigerant connection. tubing and indoor coil are ready for leak testing. Routepowerwiresthroughopeningintheunitsidepanel and connect in unit control box as shown on unit label dia- NOTE: Unit is shipped with R-22 full factory charge indi- gr
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Table 1A — Physical Data (English) UNIT 38HDL 018 024 030 036 048 060 NOMINAL CAPACITY (Btuh) 18,000 24,000 30,000 36,000 48,000 60,000 UNIT OPERATING WEIGHT (lb) 130 136 161 185 222 249 COMPRESSOR Hermetic Type Copeland Copeland Copeland Tecumseh Copeland Copeland Scroll Scroll Scroll Reciprocating Scroll Scroll Model ZR18KC-PFV ZR24KC-PFV ZR28KC-PFV AV5535G ZR47KC-PFV ZR57KC-PFV Oil (oz) Initial/Recharge 25/21 25/21 38/34 54/50 42/38 56/52 OUTDOOR FAN Propeller Type, Direct Drive, Horizontal R
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LEGEND *The IFR and IFM are located in indoor unit on heating-cooling applications. If accessory IFR is required for cooling-only applic- C— Contactor (12-va) tions, locate (IFR) in fan coil. HC — Heating Control IFM — Indoor-Fan Motor NOTE: Refer to unit wiring label for wire colors: BRN to BLU and C IFR — Indoor-Fan Relay to Y connections. TRANS — Transformer Field Wiring Factory Wiring Fig.5—Typical Control Circuit Connections LEGEND NEC — National Electrical Code TB — Terminal Board TB Conne
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Table 2 — American/European Wire Conversions SERVICE AMERICAN EUROPEAN Industry American Industry Standard Conversion Standard Before performing recommended maintenance, be 2 Size (mm) Size (mm ) sureunitmainpowerswitchisoff.Failuretodosomay 18 AWG 0.82 1.0 resultinelectricalshockorinjuryfromrotatingfanblade. 16 AWG 1.30 1.5 14 AWG 2.08 2.5 12 AWG 3.30 4.0 OutdoorFan— Areinforcedwiremountholdstheout- 10 AWG 5.25 6.0 door fan assembly in place. See Fig. 7 for proper mounting 8AWG 6.36 10.0 positi
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Table 3 — Electrical Data OPERATIONAL COMPRESSOR POWER SUPPLY VOLTAGE* UNIT SIZE V-PH-Hz 38HDL Max Fuse† or HACR-Type Min Max RLA LRA Fan FLA MCA Ckt Bkr Amps 018 10.7 47.0 .70 14.1 25 024 13.2 59.0 .70 17.2 30 030 15.7 73.0 .70 20.3 35 208/230-1-60 187 254 036 14.2 86.7 .70 18.5 30 048 24.3 131.0 1.45 31.8 50 060 28.6 170.0 1.45 37.2 65 LEGEND 2. All motors and compressors contain internal overload protection. FLA — Full LoadAmps 3. IncompliancewithNEC(U.S.A.Standard)requirementsformul- HACR —
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SUBCOOLINGMETHOD(COOLING,TXV)—Tocheck Table5A—RequiredSuction-TubeTemperature(F) andadjustchargeduringcoolingseason,useTables6Aand — English (Entering Suction Service Valve) 6B and the following procedure: SUCTION PRESSURE AT SERVICE PORT (psig) SUPERHEAT 1. Operate unit a minimum of 15 minutes before checking TEMP (F) 61.5 64.2 67.1 70.0 73.0 76.0 79.2 82.4 85.7 charge. 0 35 36 39 41 43 45 47 49 51 2. Measure liquid line temperature near liquid line service 2 37 39 41 43 45 47 49 51 53 valve, a
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COMPRESSOR—Compressorcontainsfactoryoilcharges; MAINTENANCE replaceoilwhenlost.SeeTables1Aand1Bforoilrecharge and refer to Carrier Standard Service Techniques Manual, Chapter 1, pages 1 to 21 for oil recharging procedure. See Beforeperformingrecommendedmaintenance,besure Table 7 for recommended compressor oils. unit main power is off. Failure to do so may result in electrical shock or injury from rotating fan blades. CleaningCoils — Coil should be washed out with wa- ter or blown out with compre
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TROUBLESHOOTING 11 TROUBLESHOOTING CHART — COOLING CYCLE
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Copyright 1998 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. 563-899 Printed in U.S.A. Form 38HDL-1SI Pg 12 9-98 Replaces: New Tab 3a 2a
