Filter
Top Products
Compressor
Main
accumulator
Sub
accumulator
Service valve on
narrow tube
Electric
expansion
valve
Service valve on
wide tube
DN
CN
BN
AN
DW
CW
BW
AW
O.D.1/4"
O.D.1/4"
O.D.1/4"
O.D.1/4"
O.D.1/2"
O.D.1/2"
O.D.3/8"
O.D.3/8"
Heat exchanger
Cooling cycle
Heating cycle
Defrosting cycle
Strainer Header
Header
S
M
M
M
M
4-way
valve
High pressure
switch
H.P.
Defrost valve for
hot gas bypass
Indoor unit Outdoor unit
Wide tube
Narrow tube
Outdoor Unit CU-4KE31NBU
Insulation of Refrigerant Tubing
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).
After a tube has been insulated,
never try to bend it into a narrow
curve because it can cause the tube
to break or crack.
Wide tube
Thickness:
Min.5/16"(8 mm)
Insulation
Narrow tube
Thickness:
Min.5/16"(8 mm)
IMPORTANT
CAUTION
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