Instruction/ maintenance manual of the product 38AH044-084 Carrier
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Installation, Start-Up and Service Instructions CONTENTS Page SAFETY CONSIDERA TIONS ................ 1 INST ALLA TION ............................ 1-37 Step 1 — Rig and Place Unit ............... 1 • DOMESTIC UNITS • EXPOR T UNITS • PLACING UNITS Step 2 — Check Compressor Mounting .
The placement area must be level and strong enough to support the operating weight of the unit (see T able 3A or 3B). When unit is in proper location, use of mounting holes in base rails is recommended for securing unit to supporting structure.
Remove sheet metal cover panels from return-bend end of Module 124B or 134B. Place Module 124B or 134B in position. The exposed return-bend ends of each module are now opposite each other and facing the service space. The compressors of each module are on opposite sides of the unit.
DUAL CKT SINGLE CKT SUCTION CONNECTION(S) 2 1 ⁄ 8 9 Dia [54 mm] 2 5 ⁄ 8 9 Dia [67 mm] LIQUID CONNECTION(S) 7 ⁄ 8 9 Dia [22 mm] 1 1 ⁄ 8 9 Dia [29 mm] SUCTION C 2 8 - 11 ⁄ 16 9 [627mm] 1 8 -10.
DUAL CKT SINGLE CKT SUCTION CONNECTION(S) 2 1 ⁄ 8 9 Dia [54 mm] 2 5 ⁄ 8 9 Dia [67 mm] LIQUID CONNECTION(S) 7 ⁄ 8 9 Dia [22 mm] 1 1 ⁄ 8 9 Dia [29 mm] SUCTION C 2 8 - 11 ⁄ 16 9 [627mm] 1 8 -10.
Chart 1, Field Power Supply Connections UNIT 38AH VOL T AGE Hz DIAMETER — in. (mm) QUANTITY 094 208/230 60 3 5 ⁄ 8 (92) 2 460, 575, 380 60 3 5 ⁄ 8 (92) 1 346, 380/415 50 3 5 ⁄ 8 (92) 1 LEGEND C— Copper Fin Coils MTG — Mounting SAE — Society of Automotive Engineers NOTES: 1.
Chart 1, Field Power Supply Connections UNIT 38AH VOL T AGE Hz DIAMETER — in. (mm) QUANTITY 104 208/230 60 3 5 ⁄ 8 (92) 2 460, 575, 380 60 3 5 ⁄ 8 (92) 1 346, 380/415 50 3 5 ⁄ 8 (92) 1 Fig. 4 — Dimensions — Unit 38AH104 LEGEND C— Copper Fin Coils MTG — Mounting SAE — Society of Automotive Engineers NOTES: 1.
Chart 1, Field Power Supply Connections UNIT 38AH VOL T AGE Hz DIAMETER (in.) QUANTITY 124A 124B 208/230 60 3 5 ⁄ 8 (92) 1 460, 575, 380 60 2 1 ⁄ 2 (63) 1 346, 380/415 50 3 5 ⁄ 8 (92) 1 LEGEND C— Copper Fin Coils MTG — Mounting SAE — Society of Automotive Engineers NOTES: 1.
Chart 1, Field Power Supply Connections UNIT 38AH VOL T AGE Hz DIAMETER — in. (mm) QUANTITY 134A 208/230 60 3 5 ⁄ 8 (92) 1 460, 575, 380 60 2 1 ⁄ 2 (63) 1 346, 380/415 50 3 5 ⁄ 8 (92) 1 134B 2.
T able 3A — Units 38AH044-084 Physical Data — 50/60 Hz (English) 38AH 044 054 064 074 084 OPERA TING WEIGHT WITH Cu-Al 3259 3309 3565 3812 4057 REFRIGERANT (Approx) — Lb Cu-Cu 3547 3597 3998 422.
T able 4A — Units 38AH094-134 Physical Data — 50/60 Hz (English) 38AH 094 104 124 134 124A 124B 134A 134B OPERA TING WEIGHT WITH Cu-Al 5088 5435 3630* 3630* 3630* 3877* REFRIGERANT (Approx) — Lb.
Fig. 7 — Modules 38AH124A or 134A — Shipping Locations of Piping and Sheet Metal T rim Kit RIG HERE RIG HERE RIG HERE RIG HERE CONTROL BOX SHEET MET AL COVER P ANEL (REMOVED) 24-in.
F ACTOR Y - INSTALLED SUCTION LINE LOOP Fig. 9A — T ypical Module with Cover Panels Removed Fig. 9B — Field-Installed Suction Line Loop 38AH044-084,124,134 MOUNTING SPRINGS SHIPMENT BOL TS SHIPMENT BOL TS 38AH094,104 MOUNTING BOL TS RAIL BOL T (3) (2 SHOWN) RAIL BOL T (3) (2 SHOWN) MOUNTING BOL TS Fig.
Step 3 — Make Refrigerant Piping Connections The field-supplied liquid line solenoid valve must be installed at the evaporator to avoid possible compressor damage during unit operation. See Fig. 11 (for 38AH044- 084 dual-circuit and 38AH094-134 units), or Fig.
*Field-Supplied. Fig. 12 — Required Location of Solenoid V alves and Recommended Filter Drier and Sight Glass Locations for 38AH044-084 Optional Single-Circuit Units LEGEND A— Pipe A, Suction Riser , without Trap B— Pipe B, Suction Riser with T rap C— Suction Line to Condensing Unit D— Pipe D, Suction Riser Short Lift RED.
T able 6A — Refrigerant Piping Requirements — 38AH044-104 Dual-Circuit Units — 60 Hz UNIT 38AH TOT AL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M) 15-25 (4.6-7.6) 25-50 (7.6-15.2) 50-75 (15.2-22.9) 75-100 (22.9-30.5) 100-150 (30.5-45.7) 150-200 (45.
T able 7A — Refrigerant Piping Requirements, 38AH044-104 Dual-Circuit Units — 50 Hz UNIT 38AH TOT AL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M) 15-25 (4.6-7.6) 25-50 (7.6-15.2) 50-75 (15.2-22.9) 75-100 (22.9-30.5) 100-150 (30.5-45.7) 150-200 (45.
T able 8A — Refrigerant Piping Requirements for 38AH044-084 Optional Single-Circuit Units and 38AH124,134 Modular Units (Dual-Circuit) — 60 Hz UNIT 38AH TOT AL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M) 15-20 (4.6-6.1) 20-50 (6.1-15.2) 50-75 (15.
T able 9A — Refrigerant Piping Requirements for 38AH044-084 Optional Single-Circuit Units and 38AH124,134 Modular Units (Dual Circuit) — 50 Hz UNIT 38AH TOT AL LINEAR LENGTH OF INTERCONNECTING PIPE — FT (M) 15-20 (4.6-6.1) 20-50 (6.1-15.2) 50-75 (15.
LEGEND TXV — Thermostatic Expansion V alve TYP — T ypical NOTE: Lower split first on, last off. Fig. 14 — T ypical Piping Connections for Face Split Coils for 38AH044-084 Dual-Circuit and 38AH094-134 Units LEGEND TXV — Thermostatic Expansion V alve TYP — T ypical NOTE: Lower split first on, last off.
Units 38AH124 and 134 Piping Kit Connections — The 38AH124 and 134 units are delivered with a factory- supplied suction and liquid piping kit for installation in the 24-in.
BASE RAIL BOL TS (6) CORNER POST CORNER POST Fig. 17 — Units 38AH124 and 134 with Installed T rim Kit Rails END COVER FLANGES SCREWS B TOP COVER, VERTICAL PIECE VERTICAL TOP COVER FLANGE (HIDDEN) SCREWS A END COVER TOP COVER, HORIZONT AL PIECE CORNER POST MODULE 124B OR 134B 24-in.
Step 4 — Make Electrical Connections POWER SUPPL Y — Electrical characteristics of available power supply must agree with unit nameplate rating. Supply voltage must be within the limits shown in T ables 10A or 10B, 1 1 and 12. See T able 13 for control circuit data and T able 14 for fan motor electrical data.
T able 10B — Electrical Data — 50/60 Hz (38AH044-084 Optional Single-Circuit Units) OPTIONAL SINGLE-CIRCUIT UNIT COMPRESSOR* 38AH V oltage Designation Compressor A1/A2 Model No. Nameplate V -Ph-Hz Supply V oltage MCA MOCP ICF A1 A2 Min Max RLA LRA RLA LRA 044 500 06E4250/250 208/230-3-60 187 254 179.
T able 1 1 — Electrical Data — 50/60 Hz (Units 38AH094,104) UNIT 38AH VOL T AGE DESIGNA TION NAMEPLA TE V -Ph-Hz SUPPL Y VOL T AGE* MCA MOCP ICF COMPRESSOR† A1 A2 B1 B2 Min Max RLA LRA RLA LRA RLA LRA RLA LRA 094 500 208/230-3-60 187 253 398.5 500 897 106.
T able 12 — Electrical Data — 50/60 Hz (Units 38AH124, 134) UNIT 38AH MODULE VOL T AGE DESIGNA TION COMPRESSOR A1/A2 MODEL NO. NAMEPLA TE V -Ph-Hz SUPPL Y VOL T AGE* MCA MOCP ICF COMPRESSOR† A1 A2 Min Max RLA LRA RLA LRA 124A 124B 134A 500 06E8275/ 265 208/230-3-60 187 254 249.
T able 14 — Fan Motor Electrical Data UNIT 38AH CONDENSER F AN Nameplate V -Ph-Hz Qty Hp (kW) T otal kW (No.*) FLA Each (No.*) LRA Each 044 208/230-3-60 4 1 (0.746) 6.2 (1,2) 5.5 (3,4) 6.6 (1,2) 30.0 (3,4) 31.6 460-3-60 (1,2) 2.8 (3,4) 3.3 (1,2) 30.
LEGEND AW G — American Wire Gage CR — Control Relay HD — Heating Device IFC — Indoor-Fan Contactor IFR — Indoor-Fan Relay kcmil — Thousand Circular Mils LLS — Liquid Line Solenoid NEC — National Electrical Code (U.
LEGEND AW G — American Wire Gage CR — Control Relay HD — Heating Device IFC — Indoor-Fan Contactor IFR — Indoor-Fan Relay kcmil — Thousand Circular Mils LLS — Liquid Line Solenoid NEC — National Electrical Code (U.
LEGEND AW G — American Wire Gage CR — Control Relay HD — Heating Device IFC — Indoor-Fan Contactor IFR — Indoor-Fan Relay kcmil — Thousand Circular Mils LLS — Liquid Line Solenoid NEC — National Electrical Code (U.
LEGEND AW G — American Wire Gage C— Compressor Contactor CCPS — Capacity Control Pressure Switch CR — Control Relay HD — Heating Device IFC — Indoor-Fan Contactor IFR — Indoor-Fan Relay kcmil — Thousand Circular Mils LLS — Liquid Line Solenoid NEC — National Electrical Code (U.
*Field-supplied. NOTES: 1. Factory wiring is in accordance with NEC; field modifications or addi- tions must be in compliance with all applicable codes. 2. Wiring for field power supply must be rated 75 C minimum. Use cop- per , copper-clad aluminum, or aluminum conductors.
*Field-supplied. NOTES: 1. Factory wiring is in accordance with NEC; field modifications or addi- tions must be in compliance with all applicable codes. 2. Wiring for field power supply must be rated 75 C minimum. Use cop- per , copper-clad aluminum, or aluminum conductors.
*Field-supplied. NOTES: 1. Factory wiring is in accordance with NEC. Field modifications or additions must be in compliance with all applicable codes. 2. Wiring for field power supply must be rated 75 C minimum. Use copper , copper-clad aluminum, or aluminum conductors.
*Field-supplied. NOTES: 1. Factory wiring is in accordance with NEC. Field modifications or additions must be in compliance with all applicable codes. 2. Wiring for field power supply must be rated 75 C minimum. Use copper , copper-clad aluminum, or aluminum conductors.
*Field-supplied. NOTES: 1. Factory wiring is in accordance with NEC. Field modifications or additions must be in compliance with all applicable codes. 2. Wiring for field power supply must be rated 75 C minimum. Use copper , copper-clad aluminum, or aluminum conductors.
T able 15 — Main Power Connection and Control Circuit Wiring MAIN POWER CONNECTION CONTROL CIRCUIT Electrical Characteristics (V -Ph-Hz) Qty T erminal Blocks Qty Parallel Conductors* Max Wire Size (.
ST ART -UP Compressor crankcase heaters must be on for 24 hours before start-up. T o energize the crankcase heaters, set the space thermostat above the ambient so there will be no de- mand for cooling. Close the field disconnect and turn on the fan circuit breakers.
NOTE: Use only Carrier approved compressor oil. Ap- proved sources are: Petroleum Specialties Inc. (Cryol 150A), T exaco, Inc. (Capella WF-32-150), and Witco Chemical Co. (Suniso 3GS). Do not reuse oil that has been drained out, or oil that has been exposed to atmosphere.
T able 16 — Index of Lead/Lag Circuits and Compressors UNIT 38AH 044-084 STD 044-084 OPT 094 104 124 134 LEAD CIRCUIT AA A A Module 124A Module 134A Compressor , Lead A1 A1 A1 A1 A1 A1 Compressor; L.
Fig. 30 — Charging Chart — Unit 38AH044; 50/60 Hz — Dual Circuit Fig. 31 — Charging Chart — Unit 38AH054; 50/60 Hz — Dual Circuit 41.
Fig. 32 — Charging Chart — Unit 38AH064; 50/60 Hz — Dual Circuit Fig. 33 — Charging Chart — Unit 38AH074; 50/60 Hz — Dual Circuit 42.
Fig. 34 — Charging Chart — Unit 38AH084; 50/60 Hz — Dual Circuit Fig. 35 — Charging Chart — Unit 38AH044; 50/60 Hz — Optional Single Circuit Fig.
Fig. 37 — Charging Chart — Unit 38AH064; 50/60 Hz — Optional Single Circuit Fig. 38 — Charging Chart — Unit 38AH074; 50/60 Hz — Optional Single Circuit Fig.
Fig. 40 — Charging Chart — Unit 38AH094; 50/60 Hz Fig. 41 — Charging Chart — Unit 38AH104; 50/60 Hz Fig. 42 — Charging Chart — Modules 124A, 124B, and 134A; 50/60 Hz Fig.
SERVICE ELECTRIC SHOCK HAZARD T urn of f all power to unit before servicing. The ON-OFF switch on control panel does not shut of f control power; use field disconnect. Coil Cleaning — Clean the coils with a vacuum cleaner, compressed air , water , or a non-wire bristle brush.
Winter Start Control — A2 1 ⁄ 2 -minute low-pressure switch (LPS) bypass function in the timer prevents nuisance LPS trips during start-up in low-ambient conditions. High-Pressure Switch — This switch has nonadjust- able settings. Figure 29 shows connection on a cylinder head.
T able 19A — One 2-Stage Thermostat Capacity Control for 38AH044-084 Dual-Circuit Units UNIT 38AH QUANTITY OF LOADED COMPRESSOR CYLINDERS SYSTEM CAP ACITY (%) Circuit A Circuit B T otal 044 4 4 8 10.
Timer Functions — (See T imer Cycle, Fig. 47.) Each refrigeration circuit is controlled by an independent timer which allows for the independent operation of each refrig- eration circuit. NOTE: Unit 38AH044-084 optional single-circuit units have one timer which controls the lead compressor .
38AH044-084 DUAL-CIRCUIT UNITS; 38AH094,104 — If circuit A operation is insuf f icient for the cooling require- ments, the thermostat second stage TC2 closes to bring cir - cuit B on-line for cooling.
Required Compressor Modification for 38AH044- 084 Optional Single-Circuit Units, When Com- pressor A1 is Out — T o maintain unit operation, com- pressor no.1 must be operable. If it is not operable, the following temporary modifications must be made to keep the unit running: 1.
Compressor Removal — Access to the pump end of the compressor is from the compressor side of the unit. Access to the motor end of the compressor is from the inside of the unit.
TROUBLESHOOTING PROBLEM SOLUTION COMPRESSOR DOES NOT RUN Contactor Open 1. Power off. 1. Restore power . 2. Fuses blown in field power circuit. 2. After finding cause and correcting, replace with correct size fuse. 3. No control power . 3. Check secondary fuse(s); replace with correct type and size.
TROUBLESHOOTING (cont) PROBLEM SOLUTION COMPRESSOR STOPS ON OIL PRESSURE SWITCH 1. Oil level too low or too high. 1. Check oil level requirements; adjust oil level until sight glass is filled 1 ⁄ 8 to 1 ⁄ 3 when running. 2. Compressor is short cycling.
ST ART -UP CHECKLIST A. Preliminary Information OUTDOOR: MODEL NO. SERIAL NO. INDOOR: AIR HANDLER MANUF ACTURER 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 ST ART -UP? (Y/N) CHECK POWER SUPPL Y .
C. Start-Up CHECK EV APORA TOR F AN SPEED AND RECORD. CHECK CONDENSER F AN SPEED AND RECORD. AFTER A T LEAST 10 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS: COMP A1 COMP A2 COMP B1 COMP B2.
An important point after buying a device Carrier 38AH044-084 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Carrier 38AH044-084 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Carrier 38AH044-084 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Carrier 38AH044-084 you will learn all the available features of the product, as well as information on its operation. The information that you get Carrier 38AH044-084 will certainly help you make a decision on the purchase.
If you already are a holder of Carrier 38AH044-084, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Carrier 38AH044-084.
However, one of the most important roles played by the user manual is to help in solving problems with Carrier 38AH044-084. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Carrier 38AH044-084 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
