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38AUQ
Heat Pump Condensing Units
60 Hz
®
with Puron (R-410A) Refrigerant
Sizes 07, 08, and 12
Installation, Start-Up and
Service Instructions
Comfort Alert Diagnostic Module . . . . . . . . . . . . . . 28
CONTENTS
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1
Outdoor Coil Maintenance and Cleaning
Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
INSTALLATION GUIDE
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INSTALLATION GUIDELINE ® Replacement /Retrofit – R22 to Puron ELECTRICAL SHOCK HAZARD Split system heat pumps are intended to be installed with Failure to follow this warning could cause personal injury matching indoor sections only. The 38AUQ heat pump outdoor or death. units are matched only with same-size 40RUQ indoor sections. Existing R-22 indoor coils cannot be converted to R-410A heat Before performing service or maintenance operations on pump duty. Only the existing refrigerant piping is
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Standard Corner Corner Corner Corner Center of Gravity Unit Height Weight A B C D UNIT lbs. kg. lbs. kg. lbs. kg. lbs. kg. lbs. kg. X Y Z H 23 26 13 42-3/8 38AUQ*07 444 201 134 61 97 44 90 41 123 56 [584] [660] [330] [1076] 20 24 13 42-3/8 38AUQ*08 483 219 162 74 110 50 85 39 125 57 [508] [610] [330] [1076] 21 24 23 50-3/8 38AUQ*12 575 261 186 84 126 57 106 48 157 71 [533] [610] [584] [1280] Fig. 1 — 38AUQ*07-12 Unit Dimensions 3
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Table 1A — Physical Data — 38AUQ*07-12 Units — 60 Hz English UNIT SIZE 38AUQ *07 *08 *12 67.5 10 NOMINAL CAPACITY (tons) OPERATING WEIGHTS (lb) Aluminum-Fin Coils 444 483 575 ‡ R-410A REFRIGERANT TYPE † Operating Charge, Typical (lb) 18.0 21.0 27.0 Shipping Charge (lb) 10.0 12.0 15.0 COMPRESSOR Qty...Type 1...Scroll 1...Scroll 1...Scroll OUTDOOR FANS Qty...Rpm 2...1100 2...1100 2...1100 1 1 1 Motor Hp / / / 4 4 4 Diameter (in) 22 22 22 Nominal Airflow (Cfm Total) 6,000 6,000 6,000 Watts (Total)
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Table 1B — Physical Data — 38AUQ*07-12 Units — 60 Hz SI UNIT SIZE 38AUQ *07 *08 *12 21.1 26.4 35.1 NOMINAL CAPACITY (kW) OPERATING WEIGHT (kg) Aluminum-Fin Coils 201 219 261 ‡ R-410A REFRIGERANT TYPE † Operating Charge, Typical (kg) 8.2 9.5 12.2 Shipping Charge (kg) 4.5 5.9 6.8 COMPRESSOR Qty...Type 1...Scroll 1...Scroll 1...Scroll CONDENSER FANS Qty...r/s 2...18 2...18 2...18 1 1 1 Motor Hp NEMA / / / 4 4 4 Diameter (mm) 560 560 560 Nominal Airflow (L/s) 2832 2832 2832 Watts (Total) 610 610 610
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 38 A U Q A 12 A 0 6– 0 A 0 A 0 C _____________ ____ Model Type Packaging 38AU= Carrier Condensing Unit 0=Standard Puronr R---410A Refrigerant 1=LTL Type of Coil Electrical Options Q = Heat Pump Scroll Compressor A=None C = Non-Fused Disconnect Refrigerant Options A = None Service Options B = Low Ambient 0=None 1= 1 = Un-powered Convenience Outlet Nominal Tonnage 2 = Powered Convenience Outlet 07 = 6 Tons 08 = 7.5 Tons Not Used 12 = 10 Tons A=PlaceHold
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CONSIDER SYSTEM REQUIREMENTS .INSTALLATION • Consult local building codes and National Electrical Jobsite Survey Code (NEC, U.S.A.) for special installation requirements. • Allow sufficient space for airflow clearance, wiring, Complete the following checks before installation. refrigerant piping, and servicing unit. See Fig.1 for unit 1. Consult local building codes and the NEC (National dimensions and weight distribution data. Electrical Code) ANSI/NFPA 70 for special installation • Locate the
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Table 2 — 38AUQ*07-12 Piping Recommendations (Single-Circuit Unit) R-410A Equivalent Length Ft 0-38 38-75 75-113 113-150 Model Length Linear 0-25 25-50 50-75 75-100 Nominal Capacity Length Equiiv 0-38 38-75 75-113 113-115 3 3 3 1 3 1 38AUQ*07 Liquid Line / / / / / / 8 8 8 2 8 2 Max Lift Cool 25 50 48 75 39 100 Heat 25 50 46 60 31 60 7 7 1 1 Suction Line / / 1- / 1- / 8 8 8 8 Charge (lbs) 17.8 18.8 20.3 22.6 21.4 24.5 1 1 1 1 38AUQ*08 Liquid Line / / / / 2 2 2 2 Max Lift Cool 25 50 75 100 Heat 2
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FLOW FLOW Table 5 — Refrigerant Specialties Part Numbers. LIQUID LINE LIQUID LINE LLSV SIGHT FILTER SIZE (in.) SOLENOID VALVE (LLSV) COIL GLASS DRIER 3 / ALC-066208 AMG-24/50-60 HMI-1TT3 8 Provided with unit 1 † / ALC-066209 AMG-24/50-60 HMI-1TT4 2 See Table 4 5 / ALC-066212 AMG-24/50-60 HMI-1TT5 8 † 38AUD units require TWO sets of parts. INSTALL LIQUID LINE SOLENOID VALVE — It is recommended that a bi-directional solenoid valve be EQUALIZER LINE placed in the main liquid line (see Figs. 5 & 6)
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MAKE PIPING CONNECTIONS — Piping connections at Example: the 38AUQ unit are ball valves with stub tube extensions. Do 38AUQ*08 not open the unit service valves until all interconnecting tube 60-ft (18.3 m) linear line length brazing as been completed. Equivalent line length 90-ft (27.4 m) The stub tube connections include ¼-in SAE service fittings Liquid Lift: 20-ft (6.1 m) with Schrader valve cores (see Fig. 7). Before making any brazed connections to the unit service valves, remove both Select
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Field power wires are connected to the unit at line-side pres- Units Without Disconnect Option sure lugs on compressor contactor C and TB1 (see wiring dia- gram label for control box component arrangement) or at facto- CTB1 ry-installed option non-fused disconnect switch. Max wire size 11 13 is #4 AWG (copper only). NOTE: TEST LEADS - Unit may be equipped with short leads (pigtails) on the field line connection points on con- Disconnect tactor C or optional disconnect switch. These leads are fo
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Convenience Outlet GFCI Pwd-CO Fuse Switch Pwd-CO Transformer UNIT CONNECT PRIMARY TRANSFORMER VOLTAGE AS CONNECTIONS TERMINALS 208, L1: RED + YEL H1 + H3 240 230 L2: BLU + GRA H2 + H4 L1: RED H1 Splice BLU + 460 480 H2 + H3 Control Box YEL H4 L2: GRA Access Panel L1: RED H1 575 600 L2: GRA H2 UNIT CONNECT PRIMARY TRANSFORMER Fig. 10 — Convenience Outlet Location VOLTAGE AS CONNECTIONS TERMINALS Non-powered type: This type requires the field installation of 208, L1: RED + YEL H1 + H3 240
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Press the gasket over the screw heads. Slip the backing plate Thermostat — over the screw heads at the keyhole slots and align with the Install a Carrier-approved accessory thermostat according to gasket; tighten the two screws until snug (do not over-tighten). installation instructions included with the accessory. For Mount the weatherproof cover to the backing plate as shown in complete economizer function, select a two—stage cooling Fig. 12. Remove two slot fillers in the bottom of the cove
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Table 8 — Electrical Data — 38AUQ*07-12 60 Hz Units NOMINAL VOLTAGE POWER UNIT FACTORY- COMPRESSOR FAN MOTORS ‡ VOLTAGE RANGE SUPPLY SIZE INSTALLED 38AUQ OPTION V-Ph-Hz MIN MAX RLA LRA FLA (ea) QTY MCA MOCP NONE OR DISCONNECT 26.8 45 208/230-3-60 187 253 19.0 123 1.5 2 CONVENIENCE OUTLET 31.6 50 NONE OR DISCONNECT 13.9 20 460-3-60 414 506 9.7 62 0.9 2 *07 CONVENIENCE OUTLET 16.1 25 NONE OR DISCONNECT 10.5 15 575-3-60 518 633 7.4 50 0.6 2 CONVENIENCE OUTLET 12.2 15 NONE OR DISCONNECT 34.3 50 208/
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PRE-START-UP START-UP IMPORTANT: Before beginning Pre-Start-Up or Start-Up, 38AUQ Units review Start-Up Checklist at the back of this book. The The compressor crankcase heater must be on for 24 hours Checklist assures proper start-up of a unit and provides a before start-up. After the heater has been on for 24 hours, the record of unit condition, application requirements, system unit can be started. If no time elapsed since the preliminary information, and operation at initial start-up. charge s
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Reset the space thermostat below ambient so that a call for Advanced Scroll Temperature Protection (ASTP) cooling is ensured. A label located above the terminal box identifies Copeland Scroll compressor models that contain this technology. See Fig. 14. Advanced Scroll Temperature Protection (ASTP) is a form of internal discharge temperature protection, that unloads the Never charge liquid into the low-pressure side of system. scroll compressor when the internal temperature reaches ap- Do not ov
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Fig. 16 — 38AUQ*07 Charging Chart Fig. 17 — 38AUQ*08 Charging Chart Fig. 18 — 38AUQ*12 Charging Chart 17
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Fig. 19 — 38AUQ Wiring Diagram (208/230-3-60 shown) 18
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Solenoid Valve Relay SVR and compressor contactor C.SVR OPERATING SEQUENCE contacts close, energizing the external liquid line solenoid valve. Solenoid valve LLSV opens. Compressor contactor C Base Unit Controls — closes, energizing the compressor motor. Compressor starts Indoor (Supply) Fan and system runs in Heating mode, providing Stage 1 Heat. The indoor fan contactor (IFC) is remotely located at the fan When the space heating load is satisfied terminal W1 is coil or fan section. If the ther
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ROUTINE SYSTEM MAINTENANCE SERVICE These items should be part of a routine maintenance program, Refrigeration System to be checked every month or two, until a specific schedule for each can be identified for this installation: Quarterly Inspection EQUIPMENT DAMAGE HAZARD (and 30 days after initial start) Failure to follow this caution may result in damage to Indoor section equipment. • Coil cleanliness checked. This system uses Puron® refrigerant which has higher • Return air filter replacemen
