6. REFRIGERANT FLOW DIAGRAM
11
Indoor Unit
SAP – K91A
Outdoor Unit
SAP – CM1821A
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 condensa-
tion, both tubes must be well insulated with a proper insula-
tion material. The thickness of the insulation should be a min.
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.
IMPORTANT
Wide tube
Thickness:
Min. 8 mm
Insulation
Narrow tube
Thickness:
Min. 8 mm
CAUTION
Outdoor Unit
Wide tube
O.D.
ø9.52mm
(3/8 ")
Narrow tube
O.D.
ø6.35 mm
(1/4")
C
o
n
d
e
n
s
e
r
Wide tube
service
valve
C
o
m
p
re
s
s
o
r
A
Accumulator
C
o
m
p
re
s
s
o
r
B
B
A
A
Narrow tube
service
valve
Capillary tube
B
Accumulator
E
v
a
p
o
ra
to
r
Indoor Unit A
E
v
a
p
o
ra
to
r
Indoor Unit B
