Panasonic CU-4KS31NBU service manual Outdoor Unit CU-4KS24NBU, Indoor unit Outdoor unit

Outdoor Unit CU-4KS24NBU

Indoor unit

Outdoor unit

Wide tube

O.D.1/2"

O.D.3/8"

Service valve on wide tube

DW

CW

BW

SubMain accumulator accumulator

Compressor

O.D.3/8"

O.D.3/8"

Narrow tube

O.D.1/4"

O.D.1/4"

O.D.1/4"

O.D.1/4"

		High pressure
AW		switch
		H.P.
Header
	Electric	exchanger
Service valve on	expansion	Heat
	M
narrow tube	valve
DN

M

CN

M

BN

M

AN

Strainer Header

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.

25