20
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. 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
CAUTION
Wide tube
Thickness:
Min. 8 mm
Insulation
Narrow tube
Thickness:
Min. 8 mm
Indoor Unit MCAV220R5VAA - KPAV220R5VAA
Outdoor Unit GR220R5TAA
C
o
m
p
re
s
s
o
r
4-way
valve
Accumulator
Wide tube
service
valve
Wide tube
O.D.
ø15.88 mm
(5/8 ")
Narrow
tube
service
valve
Narrow tube
O.D.
ø6.35 mm
(1/4")
H
e
a
t
e
x
c
h
a
n
g
e
r
H
e
a
t
e
x
c
h
a
n
g
e
r
Capillary tube
Check
valve
Cooling cycle
Heating cycle
Indoor unit
Outdoor unit
S
tr
a
in
e
r
Strainer
Capillary for
liquid injection
Capillary tube
Accumulator
