Panasonic CU-4KS31NBU service manual 1/4 Strainer Header Sub Main Compressor Accumulator

Outdoor Unit CU-4KS31NBU

Indoor unit Outdoor unit

	Service valve on
Wide tube	wide tube
	DW
O.D.1/2"
	CW
O.D.1/2"
	BW
O.D.3/8"
	AW
O.D.3/8"

Header

		Electric
	Service valve on	expansion
		valve
	narrow tube
		M
Narrow tube	DN
O.D.1/4"		M
	CN
O.D.1/4"		M
	BN
O.D.1/4"		M
	AN
O.D.1/4"	Strainer	Header

Sub	Main	Compressor
accumulator	accumulator
	High pressure
	switch
	H.P.
		Heat exchanger

Cooling cycle

Insulation of Refrigerant Tubing

IMPORTANT

Because capillary tubing is used in the outdoor unit, both the wide and narrow tubes of this air conditioner become cold. To prevent heat loss and wet floors due to dripping of condensation, both tubes must be well insulated with a proper insulation material. The thickness of the insulation should be a min.5/16"(8 mm).

Thickness: Min.5/16"(8 mm)

Insulation

Thickness:

Min.5/16"(8 mm)

After a tube has been insulated, never try to bend it into a narrow

Wide tube

Narrow tube

CAUTION

curve because it can cause the tube to break or crack.

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