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1.
50
Max. length of
connection pipe(ft)
66
82
82
9000Btu/h (2637W)
12000Btu/h (3516W)
18000Btu/h (5274W)
24000Btu/h (7032W)
Cooling capacity
Max. length of connection pipe
Pipe expanding method
pipe cutter
pipe
Configuration of connection pipe
A: Cut the pipe
2.
3.
leaning
uneven burr
Standard length 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 additional refrigerant oil and refrigerant charg-
ing required after prolonging connection pipe.
After the length of connection pipe is prolonged
for 10m at the basis of standard length, you should
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
Basing on the length of standard pipe, add re-
frigerant 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 leaks. Please expand the pipe according to the
following steps:
11
Outdoor unit throttle
Liquid pipe Gas pipe
1/4''
3/8'' or 1/2''
.215
1/4'' or 3/8''
5/8'' or 3/4''
.54
1/2''
3/4'' or 7/8''
1.29
5/8''
1'' or 1 1/4''
1.29
3/4''
_
2.7
7/8''
_
3.76
Clg and
htg (oz/ft)
Additional refrigerant charging amount for
R410A
Piping size
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