Carrier 50HX024-060 Owner's Manual

Installation, Start-Up andService InstructionsCONTENTSPageSAFETY CONSIDERATIONS ...1,2General ...

Table 1 — Physical DataUNIT 50HX 024 030 036 042 048 060REFRIGERANT R-22Refrigerant Control* Acutrol™ SystemSHIPPING WEIGHT (lb)Without Base Rail 309

• Size ductwork for cooling air quantity (cfm). The mini-mum air quantity for proper electric heater operation islisted in Table 2. Heater limit switc

ACCESS PANEL(REMOVE SCREWS)Fig. 13 — Indoor Coil Access PanelFig. 14 — Basepan Insulation OverVertical Duct OpeningFig. 15 — Insulation and Cover Remo

Fig. 19 — Basepan Insulation Over VerticalDischarge OpeningFig. 20 — Insulation and Cover Removed fromVertical Discharge OpeningNOTES:1. An accessory

CONVERTING HORIZONTAL DISCHARGE UNITS TODOWNFLOW (Vertical) DISCHARGE — ICM (IntegratedControl Motor) UNITS — Units are shipped in a horizontalconfigur

5. Fully secure the duct flanges using the remaining screwsprovided.The finished kit installation accommodates a 143⁄4-in. x143⁄4-in. duct.Step 6 — Prov

CONNECTING GROUND LEAD TO GROUND LUG —Refer to Fig. 27 and 28. Connect the ground lead to the chas-sis using the ground lug in the wiring splice box.R

Table 3 — Electrical Data (cont)UNITNOMINALV-Ph-HzCOMPRESSOR OFM IFM ELECTRIC HEATPOWER SUPPLYMOCPRLA LRA FLA FLA kW FLAMin CircuitAmpacityfor Wire Si

NOTE: Dimensions shown are for round-duct units. For rectangular-duct units, see Fig. 4 and 5.Fig. 26 — Duct Panel KnockoutsFig. 27 — Wiring Splice Bo

SPECIAL PROCEDURES FOR 208-V OPERATIONMake sure that the power supply to the unit is switchedOFF before making any wiring changes. Electrical shockcan

1. The power supply (volts, phase, and hertz) must corre-spond to that specified on unit rating plate.2. The electrical supply provided by the utility

PRE-START-UPFailure to observe the following warnings could resultin serious personal injury:1. Follow recognized safety practices and wear protec-tiv

CHECKINGAND ADJUSTING REFRIGERANT CHARGE— The refrigerant system is fully charged with R-22 refrig-erant, and is tested and factory sealed.NOTE: Adjus

Table 4B — Superheat Charging Table, 50HX030TEMP (F)OUTDOORENTERING AIRINDOOR AIR — 1000 CFMIndoor Air — Ewb (F)54 56 58 60 62 64 66 68 70 72 74 7665

Table 4E — Superheat Charging Table, 50HX048TEMP (F)OUTDOOR ENTERINGAIRINDOOR AIR — 1600 CFMIndoor Air — Ewb (F)54 56 58 60 62 64 66 68 70 72 74 7665

Table 5 — Required Suction-Tube Temperature (F)*SUPERHEATTEMP (F)SUCTION PRESSURE AT SERVICE PORT (psig)61.5 64.2 67.1 70.0 73.0 76.0 79.2 82.4 85.70

For Integrated Control Motors (ICM) — To configure the 50HXunit, move the 5 Easy Select board wires to the terminalswhich control the airflow. Refer to

Heating — On a call for heat, thermostat makes circuits R-Yand R-G. When compressor time delay (5 ± 2 minutes) iscompleted, a circuit is made to C, st

STRAINERACCUMULATORCOMPRESSORSTRAINERLCSOUTDOOR COILINDOOR COILABDCCheck ValvesAClosedBOpenCClosedDOpenLEGENDLCS — Loss of Charge SwitchAcutrol™ Meter

STRAINERACCUMULATORCOMPRESSORSTRAINERLCSOUTDOOR COILINDOOR COILABDCCheck ValvesAOpenBClosedCOpenDClosedLEGENDLCS — Loss of Charge SwitchAcutrol™ Meter

Table 6 — Dry Coil Air Delivery* — Horizontal and Vertical Discharge (Deduct 10% for 208 V) — Units 024-042UNIT50HXMOTORSPEED230 AND 460 V HORIZONTAL

UNIT50HXELECTRICALCHARACTERISTICSUNIT WTCORNER WTLb/KgUNIT HEIGHT DIMENSIONLb Kg A B C D E F024 208-230-1-60 257 117 57/26 69/31 75/34 56/25 28.12/714

Table8—WetCoil Pressure DropUNIT SIZE50HXAIRFLOW(cfm)PRESSURE DROP(in. wg)024600 0.012700 0.022800 0.027900 0.039030900 0.0391000 0.0571200 0.07203610

MAINTENANCETo ensure continuing high performance, and to minimizethe possibility of premature equipment failure, periodic main-tenance must be perform

d. Remove caked-on dirt from wheel and housing with abrush. Remove lint and/or dirt accumulations from wheeland housing with vacuum cleaner, using sof

COOLING AND HEATING TROUBLESHOOTING CHARTSYMPTOM CAUSE REMEDYCompressor and out-door fan will not start.Power failure Call power company.Fuse blown or

COOLING AND HEATING TROUBLESHOOTING CHART (cont)SYMPTOM CAUSE REMEDYExcessive suctionpressure.(Heat) Outdoor coil frosted Move timer on control board

START-UP CHECKLIST(Remove and Store in Job File)I. PRELIMINARY INFORMATIONMODEL NO.:DATE:SERIAL NO.:TECHNICIAN:II. PRE-START-UP (insert checkmark in b

UNIT50HXELECTRICALCHARACTERISTICSUNIT WTCORNER WTLb/KgUNIT HEIGHT DIMENSIONLb Kg A B C D E F024 208-230-1-60 277 126 62/28 74/34 80/36 61/28 31.43/798

UNIT50HXELECTRICALCHARACTERISTICSUNIT WT CORNER WT (Lb/Kg)Lb Kg A B C D036 208-230-1-60, 208/230-3-60, 460-3-60 316 144 46/21 103/47 81/37 86/39042 20

UNIT50HXELECTRICALCHARACTERISTICSUNIT WT CORNER WT (Lb/Kg)Lb Kg A B C D036 208-230-1-60, 208/230-3-60, 460-3-60 336 153 51/23 108/49 86/39 91/41042 20

PART NUMBER ‘‘A’’FLATCPRFCURB001A00 89 [203]CPRFCURB002A00 119 [279]CPRFCURB003A00 149 [356]NOTES:1. Roof curb must be set up for unit being installed

MAXIMUM ALLOWABLEDIFFERENCE (in.)A-B B-C A-C1⁄41⁄41⁄4Fig. 7 — Unit Leveling TolerancesNOTES:1. Extend a 6-in. gravel apron around pad.2. Provide a 3-f

Step 4 — Rig and Place Unit — Use spreader barsor crate top when rigging the unit. The units must be riggedfor lifting as shown in Fig. 10. Refer to F