Panasonic CU-4KS31NBU Refrigerant Flow Diagram, Insulation of Refrigerant Tubing, Indoor unit

4. REFRIGERANT FLOW DIAGRAM

4-1. Refrigerant Flow Diagram

Outdoor Unit CU-3KS19NBU

Indoor unit

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

	Service valve on
Narrow tube	narrow tube
	CN
O.D.1/4"
	BN
O.D.1/4"
	AN

O.D.1/4"

Strainer

Outdoor unit

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

M

M

M

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.

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