20
1.
15
15
15
Max. length of
connection pipe(m)
20
25
25
30
30
30
30
5000Btu/h (1465W)
7000Btu/h (2051W)
9000Btu/h (2637W)
12000Btu/h (3516W)
18000Btu/h (5274W)
24000Btu/h (7032W)
28000Btu/h (8204W)
36000Btu/h (10548W)
42000Btu/h (12306W)
48000Btu/h (14064W)
Cooling
capacity
Max. length of connection pipe
Pipe expanding method
pipe cutter
pipe
C
onfiguration of connection pipe
A: Cut the pipe
2
.
3.
leaning
uneven burr
Standard lengt
h of connection pipe: 5m, 7.5m,
8m.
Min. length of connection pipe is 3m.
Max. length of connection pipe is shown as below.
4.
The additionalrefrigerantoil and refrigerant charg-
ing required after prolonging connection pipe.
After the length of connection pipe is prolonged
for 10mat the basis of standard length, youshould
add 5ml of refrigerant oil for each additional 5m
of connection pipe.
The calculation method of additional refrigerant
charging amount(on the basis of liquid pipe):
Additional refrigerant charging amount =
prolonged length of liquid pipe × additional
refrigerant charging amount per meter
Based on the length of a standard pipe, add
refrigerant according to the requirement as
shown in the table. The additional refrigerant
charging amount per meter is different
according to the diameter of liquid pipe. See
the following sheet.
Confirm
the pipe length according to the distance
of indoor unit and outdoor unit.
Cut the required pipe with pipe cutter.
NOTICE
Improper pipe expanding is the main cause of refriger-
ant leakage. Please expand the pipe according to the
following steps:
Additional refrigerant charging amount for R22,
R407C, R410A and R134a
15
20
15
50
30
120
60
120
250 250
350 350
Gas pipe
3/8'' or 1/2''
5/8'' or 3/4''
3/4'' or 7/8''
1'' or 1 1/4''
_
_
Piping size
Liquid pipe
Outdoor unit throttle
Cooling only(g/m)
Cooling and
heating(g/m)
1/4''
1/4'' or 3/8''
1/2''
5/8''
3/4''
7/8''