Carrier 012 User Manual

Installation, Start-Up and ServiceInstructionsCONTENTSPageSAFETY CONSIDERATIONS ... 1INSTALLATION ... 1-16Step

Fig. 12 — Electric Heater Power Wiring Connections — 50LJQ, 220-3-50;Single Point Kit 50DJ902091Fig. 13 — Electric Heater Power Wiring Connections — 5

Table 2 — Electrical DataUNIT50LJQNOMINALV-PH-HZVOLTAGERANGECOMPR(each)OFM IFM ELECTRIC HEAT POWER SUPPLYELECTRIC HEATPOWER WIRINGFIG. NO.ELECTRIC HEA

FIELD CONTROL WIRING — Install a Carrier-approvedaccessory thermostat assembly according to installation in-structions included with the accessory. Lo

Step 6 — Adjust Indoor-Fan Speed — Adjust in-door fan speed to meet jobsite conditions.For units with electric resistance heating, required mini-mum L

MOTOR MOUNTINGNUTS AND BOLTSFig. 18 — Belt-Drive Motor MountingTable 5A — Fan R/s at Motor Pulley Settings (SI)50LJQMOTOR PULLEY TURNS OPEN01⁄2111⁄222

Table 6 — Fan Performance (SI), 50LJQ008 (50 Hz) — Horizontal Discharge UnitsAIRFLOW(L/s)EXTERNAL STATIC PRESSURE (Pa)50 100 150 200 250 300 350 400 4

Table 10 — Fan Performance (English), 50LJQ008 (50 Hz) — Horizontal Discharge UnitsAIRFLOW(Cfm)EXTERNAL STATIC PRESSURE (in. wg)0.2 0.4 0.6 0.8 1.0 1.

START-UPIMPORTANT: Energize crankcase heaters 24 hours priorto base unit start-up to remove entrapped refrigerantfrom the oil. Heaters are energized a

NOTES:1. In heating mode, economizer damper blade will move to the mini-mum position, and unit will operate as described for units withouteconomizer,

position of the reversing valves and shuts off the outdoorfan. The electric heaters (if installed) will be energized. Onunits with economizer, the eco

ROOF CURBACCESSORY‘‘A’’ UNIT SIZE50DJ90137118-2950LJQ008,012[356]50DJ90138128-09[610]UNIT SIZE ‘‘F’’ POWER ‘‘G’’ CONTROLCONNECTORPKG. ACC.50LJQ008,012

CONDENSATE DRAIN — Check and clean each year atstart of cooling season. In winter, keep drain dry or protectagainst freeze-up.FILTERS — Clean or repla

Fig. 25 — Cooling Charging Charts, 50LJQ008Fig. 26 — Cooling Charging Charts, 50LJQ01221

Copyright 1992 Carrier CorporationManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and w

Step 3 — Make Field Connection for Conden-sate Disposal —Units must have an external trap added.See Fig. 3. A3⁄4-in. FPT connection is located on the

Table 1A — Physical Data (SI)BASE UNIT 50LJQ 008 012NOMINAL CAPACITY (kW) 23.2 28.8OPERATING WEIGHT (kg)Unit 381 426With Economizer 401 446Roof Curb 1

Table 1B — Physical Data (English)BASE UNIT 50QJ 008 012NOMINAL CAPACITY (tons) 6.6 8.2OPERATING WEIGHT (lb)Unit 840 940With Economizer 884 984Roof Cu

UNIT50LJQSTD. UNITWEIGHTECONOMIZERWEIGHTCORNERWEIGHT ‘‘A’’CORNERWEIGHT ‘‘B’’CORNERWEIGHT ‘‘C’’CORNERWEIGHT ‘‘D’’‘‘H’’ ‘‘J’’ ‘‘K’’Lb Kg Lb Kg Lb Kg Lb

Step 5 — Make Electrical ConnectionsUnit cabinet must have uninterrupted, unbroken elec-trical ground to minimize the possibility of personalinjury if

Fig. 8 — Electric Heater Power Wiring Connections — 50LJQ, 400-3-50;Single Point Kit 50DJ902041 and 50DJ902101Fig. 9 — Electric Heater Power Wiring Co

Fig. 10 — Electric Heater Power Wiring Connections — 50LJQ, 220-3-50;Single Point Kit 50DJ902031 and 50DJ902081Fig. 11 — Electric Heater Wiring Connec