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Carrier 38AE012 manual

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Table of contents for the manual

  • Page 1

    Installation, Start-Up and Service Instructions CONTENTS Page SAFETY CONSIDERA TIONS ...................1 INST ALLA TION ..............................1 - 8 Step 1 — Complete Pre-Installation Checks ....1 Step 2 — Rig and Mount the Unit .............6 Step 3 — Complete Refrigerant Piping Connections .................................6 Step 4 ?[...]

  • Page 2

    LEGEND A— 1 1 ⁄ 4 -in. (32) diameter knockout for 5 ⁄ 8 -in. (16) ODM liquid line connection B— 1 3 ⁄ 4 -in. (44.5) diameter knockout for suction line connections of 1 1 ⁄ 8 in. (28.6) (38AE012), 1 3 ⁄ 8 in. (35) (38AE014,016), 1 5 ⁄ 8 in. (41) (38AKS024) C— 7 ⁄ 8 -in. (22.2) diameter knockout for control power D— 2-in. (50.8)[...]

  • Page 3

    1 3 2 456 7 8 12 9 10 11 LEGEND 1— Low-V oltage Fuse 5— No. 2 Fan 9— Compressor 2— No. 1 Fan 6— T erminal Block 1 (Unit Power) 1 0— Low-Pressure Switch 3— High-Pressure Switch 7— T erminal Block 2 (Control Power) 11 — Hot Gas Bypass Piping Stub ( 3 ⁄ 8 -in. ODM) 4— Circuit Breakers 8— Wraparound Coil 1 2— Muff ler Fig. 2 ?[...]

  • Page 4

    T able 1A — Physical Data (English, 60 Hz) UNIT 38AE012 38AE014 38AE016 38AKS024 OPERA TING WEIGHT (lb) 732 779 789 900 REFRIGERANT* R-22 COMPRESSOR Reciprocating, Semi-Hermetic Speed (Rpm) 1750 No. Cylinders 666 4 Model No. 06DD824 06DD328 06DD537 06E4250 Oil (pt) 10 10 10 15.5 Crankcase Heater W atts 125 125 125 180 Unloader Setting (psig) Load[...]

  • Page 5

    T able 1C — Physical Data (English, 50 Hz) UNIT 38AE012 38AE014 38AE016 38AKS024 OPERA TING WEIGHT (lb) 732 779 789 900 REFRIGERANT* R-22 COMPRESSOR Reciprocating, Semi-Hermetic Speed (Rpm) 1460 No. Cylinders 666 4 Model No. 06DD824 06DD328 06DD537 06E4250 Oil (pt) 10 10 10 15.5 Crankcase Heater W atts 125 125 125 180 Unloader Setting (psig) Load[...]

  • Page 6

    T a b l e2—W eight Distribution UNIT WEIGHT — lb (kg) T otal Operating Support Point AB C D 38AE012 732 (333) 142 (65) 138 (63) 225 (102) 227(103) 38AE014 779 (354) 143 (65) 140 (64) 247 (1 12) 249 (1 13) 38AE016 789 (359) 143 (65) 143 (65) 250 (1 14) 253 (1 15) 38AKS024 900 (408) 178 (81) 168 (76) 269 (122) 285 (129) Step 2 — Rig and Mount t[...]

  • Page 7

    INST ALL FIL TER DRIER(S) AND MOISTURE INDICA- TOR(S) — Every unit should have a filter drier and liquid- moisture indicator (sight glass). In some applications, depending on space and convenience requirements, it may be desirable to install 2 filter driers and sight glasses. One filter drier and sight glass may be installed at A locations in [...]

  • Page 8

    T able 5A — Electrical Data (3 Ph/60 Hz) UNIT UNIT COMPR F AN MOTORS (Single Phase) Model V olts MCA ICF MOCP (Fuse) RLA LRA T otal Fans FLA (ea) Fan No. kW Nameplate Supplied* Min Max 12 38AE012 501 208-230 187 253 62.5 178 100 43.6 170 2 4.3 3.7 1.41 201 380 342 418 35.0 101 50 24.0 93 4.3 3.7 601 460 414 528 29.1 81 40 20.0 77 2.3 1.9 101 575 [...]

  • Page 9

    PRE-ST ART -UP Evacuate and Dehydrate the entire refrigerant sys- tem by either of the methods described in Carrier Standard Service T echniques Manual, Chapter 1. Leak T est the entire refrigerant system by the pres- sure method described in Carrier Standard Service T ech- niques Manual, Chapter 1. Use R-22 at approximately 25 psig (172.4 kPa) bac[...]

  • Page 10

    Fig. 9 — 38AE012 and 38AKS024 Charging Chart 10[...]

  • Page 11

    Fig. 10 — 38AE014 Charging Chart 11[...]

  • Page 12

    Fig. 1 1 — 38AE016 Charging Chart 12[...]

  • Page 13

    Check Operation — V erify operation of all safety con- trols. Replace all service panels. Be sur e that contr ol panel cover is closed tightly . OPERA TING SEQUENCE Cooling — When the first stage (TC1) of the cooling ther- mostat closes, the timer starts. After approximately 3 sec- onds, the timer activates the compressor and fan motor no. 1 c[...]

  • Page 14

    Outdoor Fans — Each fan is supported by a formed- wire mount bolted to the fan deck and covered with a wire guard. The exposed end of the motor shaft is covered with a rubber boot. In case a fan motor must be repaired or re- placed, be sure the rubber boot is put back on when the fan is reinstalled and be sure the fan guard is in place before sta[...]

  • Page 15

    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. Replace transformer if primary windings receivi[...]

  • Page 16

    TROUBLESHOOTING (cont) PROBLEM SOLUTION COMPRESSOR CYCLES ON LOW-PRESSURE SWITCH (cont) Airflow Restricted 1. Coil iced up. 1. Check refrigerant charge. 2. Coil dirty . 2. Clean coil fins. 3. Air filters dirty . 3. Clean or replace filters. 4. Dampers closed. 4. Check damper operation and position. Indoor-Air Fan Stopped 1. Electrical connectio[...]

  • Page 17

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  • Page 18

    P ACKAGED SER VICE 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 • Maintenance • Installation Overview • Operating Sequence A large selection of product, theory , and skills programs is available. A[...]

  • Page 19

    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 . DOES IT AGREE WITH UNIT? (Y/N) HAS THE GROUND[...]

  • Page 20

    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 (dry bulb) TEMP [...]