Carrier 38CKC Installation Instructions Manual

Also see for 38CKC: Owner's manual Installation and start-up instructions Operating guide Product data Product data

Contents

5UNIT DAMAGE HAZARDFailure to follow this caution may result in unit damage.S 3--phase scroll compressors are rotation sensitive.S A flashing LED on phase monitor indicates reverserotation. (See Fig. 4 and Table 2.)S This will not allow contactor to be energized.S Disconnect power to unit and interchange 2 field wiringleads on unit contactor.! CAUTIONCHECK CHARGEFactory charge amount and desired subcooling are shown on unitrating plate. Charging method is shown on information plate insideunit. To properly check or adjust charge, conditions must befavorable for subcooling charging. Favorable conditions existwhen the outdoor temperature is between 70_F and 100_F(21.11_C and 37.78_C), and the indoor temperature is between70_F and 80_F (21.11_C and 26.67_C). Follow the procedurebelow:Unit is factory charged for 15ft (4.57 m) of lineset. Adjust chargeby adding or removing 0.6 oz/ft of 3/8 liquid line above or below15ft (4.57 m) respectively.For standard refrigerant line lengths (80 ft/24.38 m or less), allowsystem to operate in cooling mode at least 15 minutes. If conditionsare favorable, check system charge by subcooling method. If anyadjustment is necessary, adjust charge slowly and allow system tooperate for 15 minutes to stabilize before declaring a properlycharged system.If the indoor temperature is above 80_F (26.67_C), and theoutdoor temperature is in the favorable range, adjust system chargeby weight based on line length and allow the indoor temperature todrop to 80_F (26.67_C) before attempting to check system chargeby subcooling method as described above.If the indoor temperature is below 70_F (21.11_C), or the outdoortemperature is not in the favorable range, adjust charge for line setlength above or below 15ft (4.57 m) only. Charge level should thenbe appropriate for the system to achieve rated capacity. The chargelevel could then be checked at another time when the both indoorand outdoor temperatures are in a more favorable range.NOTE: If line length is beyond 80 ft (24.38 m) or greater than 20ft (6.10 m) vertical separation, See Long Line Guideline forspecial charging requirements.UNIT DAMAGE HAZARDFailure to follow this caution may result in unit damage.Compressor damage may occur if system is overcharged.! CAUTIONCARE AND MAINTENANCEFor continuing high performance and to minimize possibleequipment failure, it is essential that periodic maintenance beperformed on this equipment. Consult your servicing contractor orOwner’s Manual for proper frequency of maintenance. Frequencyof maintenance may vary depending upon geographic areas, suchas coastal applications.Leave Owner’s Manual with homeowner. Explain systemoperation and maintenance procedures outlined in manual.24 VAC HOT24 VAC COMRCGW/W1Y/Y2RCCA/CTHERMOSTATTypicalFAN COILAIRCONDITIONERGW2HEAT STAGE 1COOL STAGE 1INDOOR FAN24 VAC HOT24 VAC COMRCGW/W1Y/Y2RCCA/CTHERMOSTATTypicalFURNACEAIRCONDITIONERYGWHEAT STAGE 1COOL STAGE 1INDOOR FANA02326Fig. 5 --- Generic Wiring Diagrams(See Thermostat Installation Instructions for wiring specific unit combinations)

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