Carrier 38AKS028-044 manual

Installation, Start-Up and Service Instructions CONTENTS Page SAFETY CONSIDERA TIONS ...................1 BEFORE INST ALLA TION .....................1 - 3 Rigging ......................................1 Placing Unit .................................3 Mounting Unit ...............................3 Compressor Mounting ........................3 INST A[...]

T able 1A — Physical Data — English UNIT 38AKS 028 034 044 COMPRESSOR Reciprocating Semi-Hermetic No. ...T ype 1...06E9265 1...06E9275 1...06E9299 No. Cyls (ea)...Speed, Rpm (60/50 Hz) 6...1750/1460 Capacity Steps 3 Oil Charge*, Pt 20.0 20.0 19.0 Oil Pressure Switch (psi) Set Points — Cutout 6 6 2 Differential — Cut-in 14 Max. Crankcase Hea[...]

Placing Unit — There must be 4 ft (1220 mm) for ser- vice on all sides of unit, and a minimum of 8 ft (2440 mm) clear air space above unit. For multiple units, allow 8 ft (2440 mm) separation between units for airflow and service. Mounting Unit — When unit is in proper location, use of mounting holes in base rails is recommended for securing u[...]

Receiver — No receiver is provided with the unit; it is recommended that one not be used. Piping Procedure — Do not remove run-around pipe from suction and liquid line stubs until piping connections are ready to be made. Pass nitrogen or other inert gas through piping while brazing, to prevent formation of copper oxide. Install field-supplied [...]

T able 2A — Refrigerant Piping Sizes — 60 Hz SINGLE SUCTION RISERS UNIT 38AKS LENGTH OF INTERCONNECTING PIPING, FT (M) 16-25 (4.9-7.6) 26-50 (7.9-15.2) 51-75 (15.5-22.8) 76-100 (23.2-30.5) 101-200 (30.8-60.9) LSL S L S L S L S 028 7 ⁄ 8 1 5 ⁄ 8 7 ⁄ 8 2 1 ⁄ 8 * 7 ⁄ 8 2 1 ⁄ 8 * 7 ⁄ 8 2 1 ⁄ 8 * 7 ⁄ 8 2 1 ⁄ 8 * 034 7 ⁄ 8 2 1 ?[...]

Power Supply — Electrical characteristics of available power supply must agree with unit nameplate rating. Supply voltage must be within limits shown in T able 3. IMPOR T ANT : Operating unit on improper supply volt- age, or with excessive phase imbalance, constitutes abuse and may af fect Carrier warranty . See Unbalanced 3-Phase Supply V oltage[...]

FIELD CONNECTIONS 1. Main Power — Bring wires from the fused disconnect switch through hole in bottom rail of unit to control box 11 12 (Fig. 6 and 7) and connect terminals , , and 13 line side of terminal block TB1 (see Fig. 8 and 9A or 9B). T o comply with NEC Article 440-14, the discon- nect must be located within sight from and readily ac- ce[...]

Fig. 6 — Dimensional Drawing, 38AKS028,034 LEGEND NEC — National Electrical Code VAV — V ariable Air V olume NOTES: 1. There must be minimum (2440 mm) 8 ft. clear air space above unit. 2. The approximate operating weight of the unit is: 50 AND 60 HZ UNIT WT (Lb) WT (Kg) 38AKS028 1650 748 38AKS028C 1804 818 38AKS034 1803 818 38AKS034C 2009 91 [...]

LEGEND NEC — National Electrical Code NOTES: 1. There must be minimum (2440 mm) 8 ft. clear air space above unit. 2. The approximate operating weight of the unit is: 50 HZ AND 60 HZ UNIT WT (Lb) WT (Kg) 38AKS044 2437 1 106 38AKS044C 2745 1246 Fig. 7 — Dimensional Drawing, 38AKS044 3. A ‘ ‘C’’ in the model number indicates unit has facto[...]

LEGEND AFS — Airflow Switch CB — Circuit Breaker EQUIP — Equipment FU — Fuse GND — Ground LLS1 — Liquid Line Solenoid for Solenoid Drop Control LLS2 — Liquid Line Solenoid for Capacity Control NEC — National Electrical Code, U.S.A. TB — T erminal Block TC — Thermostat Cooling Field Power Wiring Field Control Wiring Factory Inst[...]

BPR — Bypass Relay C— Contactor , Compressor DB — Circuit Breaker CR — Control Relay CM — Control Module EQUIP — Equipment FC — Fan Contactor Fig. 9A — Component Arrangement — 60 Hz FM — Fan Motor FU — Fuse GND — Ground LLSV — Liquid Line Solenoid V alve NEC — National Electrical Code (U.S.A.) TB — T erminal Block TRAN[...]

LEGEND BPR — Bypass Relay C— Contactor , Compressor CB — Circuit Breaker CR — Control Relay CM — Control Module EQUIP — Equipment FC — Fan Contactor FM — Fan Motor FU — Fuse GND — Ground LLSV — Liquid Line Solenoid V alve NEC — National Electrical Code (U.S.A.) TB — T erminal Block TDR — T ime Delay Relay TRAN — T rans[...]

ST ART -UP Initial Check Do not attempt to start the condensing unit, even mo- mentarily, until the following steps have been com- pleted. Compressor damage may result. 1. Check all auxiliary components, such as air -handling equip- ment, and other equipment. Consult the manufacturer ’ s instructions regarding any other equipment connected to the[...]

Fig. 10 — 38AKS028 Charging Chart, 50/60 Hz 14[...]

Fig. 1 1 — 38AKS034 Charging Chart, 50/60 Hz 15[...]

Fig. 12 — 38AKS044 Charging Chart, 50/60 Hz 16[...]

FOR SER VICING ONL Y — T o speed up the 5-minute anti- short cycle, a temporary jumper may be placed between ter- minals T1 and T6 of the control module. This jumper must be removed after servicing is com- plete. Failure to remove this jumper is considered abu- sive treatment and will void the Carrier warranty. Bypass Relay (BPR) — All units ar[...]

COMPRESSOR END AND RIGHT -SIDE VIEW TRAN2 CB1 CB2 TB3 FC3 FC2 FC CM CR1 TRAN1 TB2 C1 COMPRESSOR END, CONTROL P ANEL REMOVED OIL PRESSURE SAFETY SWITCH COMPRESSOR END, LEFT -SIDE ACCESS DOOR (JUNCTION BOX COVER REMOVED) LIQUID LINE SERVICE VA LV E COMPRESSOR END, RIGHT -SIDE ACCESS DOOR Fig. 13 — 38AKS Unit with Access Panels Removed 18[...]

Fan Adjustment — Adjust fan as shown in Fig. 14. Oil Charge — Compressors are factory charged with oil as follows: COMPRESSOR AMOUNT pints (liters) 06E9265 20.0 (9.4) 06E9275 20.0 (9.4) 06E9299 19.0 (9.0) When additional oil or a complete charge is required, use only Carrier-approved compressor oil: Petroleum Specialities Inc. .................[...]

Oil Pressure Safety Switch (OPS) — The OPS in the control circuit stops the compressor and unit, if proper oil pressure dif ferential is not established at start-up or main- tained during operation. If OPS stops the unit, determine the cause and correct before restarting unit. Failure to do so will constitute abuse. Equipment failur e due to abus[...]

TROUBLESHOOTING SYMPTOM AND PROBABLE CAUSE PROBABLE REMEDY COMPRESSOR DOES NOT RUN 1. Control circuit breaker tripped 1. Reset control circuit breaker 2. Power line open 2. Reset circuit breaker 3. Oil pressure switch tripped 3. Reset oil pressure switch at unit 4. Safety device tripped 4. Reset control circuit with thermostat 5. Contactor stuck op[...]

P ACKAGED SERVICE TRAINING Our packaged service training programs provide an excellent way to increase your knowledge of the equipment discussed in this manual. Product programs cover: • Unit Familiarization • Installation Overview • Maintenance • Operating Sequence A large selection of product, theory , and skills programs is available. Al[...]

ST ART -UP CHECKLIST (Remove and store in job file) 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 . DOES IT AGREE[...]

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: OIL PRESSURE SUCTION PRESSURE SUCTION LINE TEMP DISCHARGE PRESSURE DISCHARGE LINE TEMP ENTERING CONDENSER AIR TEMP LEA VING CONDENSER AIR TEMP EV AP ENTERING AIR DB TEMP EV AP ENTER[...]