Carrier 38CKB instruction manual ÐMake Electrical Connections, Liquid Vapor Unit Size

Table 1ÐRefrigerant Connections and Recommended Liquid and Vapor Tube Diameters

		LIQUID						VAPOR
UNIT SIZE	Connection Dia.			Tube Dia.		Connection Dia.				Tube Dia.
	In.	mm	In.		mm	In.	mm		In.		mm
018, 024	3/8	9.53	3/8		9.53	5/8	15.88		5/8		15.88
036	3/8	9.53	3/8		9.53	3/4	19.05		3/4		19.05
048	3/8	9.53	3/8		9.53	7/8	22.23		7/8		22.23
060	3/8	9.53	3/8		9.53	7/8	22.23		1-1/8		28.58

1.Tube diameters are for lengths up to 50 ft (15.24m). For tube sets over 50 ft (15.24m), consult Long-Line Application Guideline.

2.Do not apply capillary tube indoor coils to these units.

To prevent damage to unit or service valves observe the following:

·Use a brazing shield.

·Wrap service valves with wet cloth or use a heat sink material.

SWEAT CONNECTION Ð Use refrigerant grade tubing. Service valves are closed from factory and ready for brazing. After wrapping the service valve with a wet cloth, the tubing set can be brazed to the service valve using either silver bearing or non-silver bearing brazing material. Consult local code requirements. Refrig- erant tubing and indoor coil are now ready for leak testing. This check should include all field and factory joints.

NOTE: Avoid contact between tubing and structure.

OUTDOOR WALL INDOOR WALL

CAULK

LIQUID TUBE

VAPOR TUBE

INSULATION

THROUGH THE WALL

JOIST

HANGER STRAP

(AROUND VAPOR

NOTE: Operation of unit on improper line voltage constitutes abuse and could affect unit reliability. See unit rating label. Do not install unit in system where voltage or phase imbalance may fluctuate above or below permissible limits.

NOTE: Use copper wire only between disconnect switch and unit.

NOTE: Install branch circuit disconnect per local codes of adequate size to handle unit starting current. Locate disconnect within sight from and readily accessible from unit per local codes.

To avoid personal injury or death, do not supply power to unit with compressor terminal box cover removed.

The unit cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. Failure to follow this warning can result in an electric shock, fire, or death.

ROUTE GROUND AND POWER WIRES Ð Remove access panel and control box cover to gain access to unit wiring. Extend wires from disconnect through power wiring hole provided and into unit control box. (See Fig. 2.) Size wires per local codes, but not smaller than minimum wire size shown on unit rating label.

CONNECT GROUND AND POWER WIRES Ð Connect ground wire to ground connection in control box for safety. Connect power wiring to contactor as shown in Fig. 4.

TUBE ONLY)	INSULATION
	VAPOR TUBE

1″ MIN
(25 mm)		LIQUID TUBE
	SUSPENSION

A94330

Fig. 3ÐPiping Installation

DISCONNECT

PER N.E.C. AND/OR LOCAL CODES

FIELD POWER

WIRING

3 PHASE ONLY

FIELD GROUND

WIRING

CONTACTOR

BLUE

GROUND

LUG

A94025

Step 5ÐMake Electrical Connections

Be sure field wiring complies with local and national fire, safety, and electrical codes, and voltage to system is within limits shown on unit rating label. Contact local power company for correction of improper voltage. See unit rating label for recommended circuit protection device.

Fig. 4ÐLine Power Connections

NOTE: Use No. 18 AWG (American Wire Gage) color-coded, insulated (35° C minimum) wire. If thermostat is located more than 100 ft (30.5m) from unit as measured along the control voltage wires, use No. 16 AWG color-coded wires to avoid excessive voltage drop.

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