Carrier 38AKS013-024 Pre-Start-Up, System Check, Ð Electrical Data 3 Ph/50 Hz, Mca Icf

Table 6B Ð Electrical Data (3 Ph/50 Hz)

					UNIT					COMPR		FAN MOTORS 230 v (Single Phase)
UNIT			Volts						MOCP			Total	FLA (ea)
38AKS	Model			Supplied*			MCA	ICF	(Fuse	RLA	LRA			Fan No.		kW
		Nameplate										Fans
									Only)
				Min		Max							1		2
013	803	230		198		264	47.5	134	75	32.9	128	2	2.9		3.5	1.20
	903	400		342		457	31.4	80	50	20.0	74
014	803	230		198		264	51.0	149	75	35.7	143	2	2.9		3.5	1.20
	903	400		342		457	34.0	89	50	22.1	83
016	803	230		198		264	66.9	206	100	47.9	200	2	2.9		3.5	1.20
	903	400		342		457	43.0	121	60	29.3	115
024	803	230		198		254	91.8	213	150	67.9	207
	303	346		311		380	51.5	121	80	33.3	115	2	2.9		3.5	1.20
	903	400		342		440	50.2	179	80	34.6	173

	LEGEND	*Units are suitable for use on electrical systems where voltage sup-
FLA	Ð Full Load Amps (Fan Motors)	plied to the unit terminals is not below or above the listed limits.
ICF	Ð Maximum Instantaneous Current Flow during start-up	NOTES:
	(LRA of compressor plus total FLA of fan motors)	1. The MCA and MOCP values are calculated in accordance
kW	Ð Total Fan Motor Input (kilowatts)	with the National Electrical Code (NEC) article 440 (U.S.A.
LRA	Ð Locked Rotor Amps	standard).
MCA	Ð Minimum Circuit Amps per NEC (U.S.A.),	2. Motor RLA and LRA values are established in accordance
	Section 430-24	with Underwriters' Laboratories (UL) Standard 1995 (U.S.A.
MOCP Ð Maximum Overcurrent Protection (amps)		standard).
RLA	Ð Rated Load Amps (Compressor)

PRE-START-UP

IMPORTANT: Before beginning Pre-Start-Up or Start-Up, review Start-Up Checklist at the back of this book. The Checklist assures proper start-up of a unit and provides a record of unit condition, application re- quirements, system information, and operation at ini- tial start-up.

Do not attempt to start the condensing unit, even momentarily, until the following steps have been com- pleted. Compressor damage may result.

System Check

1.Check all air handler(s) and other equipment auxiliary com- ponents. Consult the manufacturer's instructions regard- ing any other equipment connected to the condensing unit. If unit has ®eld-installed accessories, be sure all are prop- erly installed and correctly wired. If used, air¯ow switch must be properly installed.

2.Backseat (open) compressor suction and discharge valves. Now close valves one turn to allow refrigerant pressure to reach test gages.

3.Open liquid line service valve.

4.Check tightness of all electrical connections.

5.Compressor oil level should be visible in sight glass. See Fig. 9. Adjust the oil level as required. Refer to Pre- liminary Oil Charge section. No oil should be removed unless the crankcase heater has been energized for at least 24 hours.

6.Be sure unit is properly leak checked, dehydrated, and charged. See Preliminary Charge, this page.

7.Electrical power source must agree with nameplate rating.

8.Crankcase heater must be ®rmly locked into compressor crankcase. Be sure crankcase is warm (heater must be on for 24 hours before starting compressor).

9.Be sure compressor ¯oats freely on the mounting springs and that snubber washers can be moved with ®nger pres- sure. See Compressor Mounting, page 8, and Fig. 3 for loosening compressor bolts.

Leak Test and Dehydration Ð Leak test the entire refrigerant system using soap bubbles and/or an electronic leak detector. Evacuate and dehydrate entire refrigerant sys- tem by use of methods described in GTAC II, Module 4, System Dehydration.

Turn On Crankcase Heater Ð Turn on crankcase heater for 24 hours before starting the unit to be sure all the refrigerant is out of the oil. To energize the crankcase heater, proceed as follows:

1.Set the space thermostat set point above the space tem- perature so there is no demand for cooling.

2.Close the ®eld disconnect.

3.Turn the fan circuit breaker on. Leave the com- pressor circuit breakers off. The crankcase heater is now energized.

Preliminary Charge Ð Refer to GTAC II, Module 5, Charging, Recovery, Recycling, and Reclamation for charg- ing methods and procedures. Charge each system with R-22 by the liquid charging method (through liquid service valve) on the high side. Charge according to the values in the Charging Chart, Fig. 10, 11, or 12.

12