Sanyo CMH1972A Technical & Service Manual page 25

Outdoor Unit CMH3172A
Indoor unit
Wide tube
O.D.1/2"
O.D.1/2"
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"
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).
After a tube has been insulated,
never try to bend it into a narrow
CAUTION
curve because it can cause the tube
to break or crack.
Service valve on
wide tube
DW
CW
BW
AW
Header
Electric
expansion
Service valve on
valve
narrow tube
M
DN
M
CN
M
BN
M
AN
Strainer
23
Outdoor unit
Sub Main
accumulator accumulator
High pressure
switch
4-way
valve
Defrost valve for
hot gas bypass
Header
Thickness:
Min.5/16"(8 mm)
Wide tube
H.P.
S
Cooling cycle
Heating cycle
Defrosting cycle
Insulation
Thickness:
Min.5/16"(8 mm)
Narrow tube