Carrier 38AK007 Make Electrical Connections, Liquid Line Data 60 Hz, Liquid Line Data 50 Hz

Fig. 4 — Typical Compressor Mounting

(38AKS Units)

FILTER DRIER AND MOISTURE INDICATOR — The fil- ter drier is factory installed. Moisture indicator is field-supplied and should be installed just after liquid line shutoff valve. Do not use a receiver; there is none provided with unit and one should not be used.

NOTE: Unit is shipped with R-22 holding charge. System pressure must be relieved before removing caps. Recover refrigerant prior to brazing.

Pass nitrogen or other inert gas through piping while braz- ing to prevent formation of copper oxide.

Install field-supplied thermostatic expansion valve to evap- orator section. It is recommended that a field-supplied liquid line solenoid be positioned in the main liquid line close to the evaporator coil, and wired to close when compressor stops to minimize refrigerant migration during the ‘‘OFF’’ cycle.

Table 4A — Liquid Line Data — 60 Hz

		MAX			LIQUID LINE
UNIT	ALLOWABLE			Max Allowable		Max Allowable
38	LIQUID LIFT			Pressure Drop		Temp Loss
	Ft		M	psi	kPa	F	C
AK007	86		26.2	7	48.3	2	1
AK008	60		18.3	7	48.3	2	1
AK012	70		21.3	7	48.3	2	1
AKS008	60		18.3	7	48.3	2	1
AKS009	65		19.8	7	48.3	2	1
AKS012	65		19.8	7	48.3	2	1

NOTE: Values shown are for units operating at 45 F (7.2 C) satu- rated suction and 95 F (35 C) entering air.

Table 4B — Liquid Line Data — 50 Hz

		MAX			LIQUID LINE
UNIT	ALLOWABLE			Max Allowable		Max Allowable
38	LIQUID LIFT			Pressure Drop		Temp Loss
	Ft		M	psi	kPa	F	C
AK007	76		23.2	7	48.3	2	1
AK008	50		15.2	7	48.3	2	1
AK012	57		17.4	7	48.3	2	1
AKS008	50		15.2	7	48.3	2	1
AKS009	52		15.8	7	48.3	2	1
AKS012	52		15.8	7	48.3	2	1

NOTE: Values shown are for units operating at 45 F (7.2 C) satu- rated suction and 95 F (35 C) entering air.

Step 4 — Make Electrical Connections

Unit cabinet must have an uninterrupted, unbroken electri- cal ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control com- partment, or conduit approved for electrical ground when installed in accordance with NEC ANSI (American National Standards Institute)/NFPA (National Fire Protec- tion Association) 70 (U.S.A. Standards) and local electrical codes. Failure to follow this warning could result in the installer being liable for personal injury of others.

FIELD POWER SUPPLY — All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire from the 230-v 1/4-in. spade terminal on the transformer and connecting it to the 200-v 1/4-in. spade terminal from the transformer.

Refer to unit label diagram for additional information. Pigtails are provided for field wire connections. Use factory- supplied splices or UL (Underwriters’ Laboratories) (U.S.A. Standard) approved copper/aluminum connector.

When installing units, provide a disconnect per NEC. All field wiring must comply with NEC and local requirements.

Install field wiring as follows:

1.Install conduit through side panel openings.

2.Install power lines to connections as shown in Fig. 5. Wrap connections with electrical tape.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate (also see Ta- ble 5). Voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 5, Note 2, to determine the percent voltage imbalance Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical compo- nents. Such operation would invalidate any applicable Carrier warranty.

208/230-3-60 380-3-60 460-3-60 575-3-60 220-3-50 400-3-50

LEGEND

C— Contactor

NEC — National Electrical Code

Field Wiring

Factory Wiring

Splice Connection (Factory Supplied)

Fig. 5 — Power Wiring Connections

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