Carrier Comprehensive 410A Charging Chart for AC Maintenance

	758	110
	683	100
(KILOPASCALS)PRESSURELINESUCTION				OUTDOOR TEMP
		(PSIG)PRESSURELINESUCTION
				OF	OC
				115	46
	621		90	105	41
				95	35
	552		80	85	29
				75	24
	483		70	65	18
				55	13
	414		60	45	7
	345		50
	276		40
	207		30

30	40	50	60	70	80	90
	SUCTION LINE TEMPERATURE (OF)
-1	4	10	16	21	27	32
	SUCTION LINE TEMPERATURE (OC)

C00164

Fig. 18ÐCooling Charging Chart, 50ZH036 Units

758110

683100

(KILOPASCALS)PRESSURELINESUCTION		(PSIG)PRESSURELINESUCTION		OUTDOOR TEMP
				OF	OC
	621		90	115	46
				105	41
				95	35
	552		80	85	29
				75	24
	483		70	65	18
				55	13
	414		60	45	7
	345		50
	276		40
	207		30

30	40	50	60	70	80	90
	SUCTION LINE TEMPERATURE (OF)
-1	4	10	16	21	27	32
	SUCTION LINE TEMPERATURE (OC)

C00165

Fig. 19ÐCooling Charging Chart, 50ZH042 Units

supplemental electric heat. When thermostat is satisfied, contacts open, deenergizing contactor and relay; motors and heaters deen- ergize. The IFM may be controlled by a time-delay relay that keeps the fan on for 30 seconds.

DEFROST

Defrost board (DB) is a time and temperature control, which includes a field-selectable time period between checks for defrost (30, 50 and 90 minutes). The time period is factory-set at 30 minutes and should only be adjusted by a trained service person. Electronic timer and defrost cycle start only when contactor is energized and defrost thermostat (DFT) is closed.

Defrost mode is identical to Cooling mode. The outdoor fan motor stops because of ªOF1º and ªOF2º contacts opening on the defrost board, a bank of optional electric heat turns on to warm air supplying the conditioned space.

	758	110
SUCTION LINE PRESSURE (KILOPASCALS)	683	100
								OUTDOOR TEMP
								OF	OC
	621	SUCTION LINE PRESSURE (PSIG)	90					115	46
								105	41
	552		80					95	35
								85	29
								75	24
	483		70					65	18
								55	13
	414		60					45	7
	345		50
	276		40
	207		30
			30	40	50	60	70	80	90

SUCTION LINE TEMPERATURE (OF)

-1	4	10	16	21	27	32
	SUCTION LINE TEMPERATURE (OC)

C00166

Fig. 20ÐCooling Charging Chart, 50ZH048 Units

	758	110						OUTDOOR TEMP
								OF	OC
SUCTION LINE PRESSURE (KILOPASCALS)	683	100
								115	46
	621	SUCTION LINE PRESSURE (PSIG)	90					105	41
								95	35
								85	29
	552		80					75	24
								65	18
	483		70					55	13
								45	7
	414		60
	345		50
	276		40
	207		30
			30	40	50	60	70	80	90

SUCTION LINE TEMPERATURE (OF)

-1	4	10	16	21	27	32
	SUCTION LINE TEMPERATURE (OC)

C00167

Fig. 21ÐCooling Charging Chart, 50ZH060 Units

ELECTRIC RESISTANCE HEATING

If accessory electric heaters are installed, on a call for ªEmergency Heatº the thermostat energizes W which energises the heater relay and in turn energizes the electric heaters. The IFR is energized which starts the indoor-fan motor. If the heaters are staged, W2 is energized when the second stage of heating is required. When the need for heating is satisfied, the heater and IFM are deenergized.

MAINTENANCE

To ensure continuing high performance, and to reduce the possi- bility of premature equipment failure, periodic maintenance must be performed on this equipment. This cooling unit should be inspected at least once each year by a qualified service person. To troubleshoot cooling of units, refer to Troubleshooting chart in back of book.

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