4. REFRIGERANT FLOW DIAGRAM
12
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
C
o
m
p
re
s
s
o
r
4-way
valve
Accumulator
Wide tube
service
valve
Wide tube
O.D.
ø9.52 mm
(3/8 ")
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
Muffler
Cooling cycle
Heating cycle
Strainer
Indoor unit
Outdoor unit
Capillary tube
(for heating)
Check
valve
Capillary tubes
(both for heating
and cooling)
Indoor Unit
SAP – K91AHA
Outdoor Unit
SAP – C91AHA
C
o
m
p
re
s
s
o
r
4-way
valve
Accumulator
Wide tube
service
valve
Wide tube
O.D.
ø12.7 mm
(1/2 ")
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
Muffler
Cooling cycle
Heating cycle
Indoor unit
Outdoor unit
Capillary tubes
(both for heating
and cooling)
Receiver
tank
Indoor Unit
SAP – K121AHA
Outdoor Unit
SAP – C121AHA
