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Considering the allowable pipe length and
height drop to decide the installation position.
Make sure the distance and height drop
between indoor and outdoor unit not exceeded
the date in the following table.
Max. Length
Model
m
9,000Btu/h
25
12,000Btu/h
25
18,000Btu/h
30
24,000Btu/h
50
36,000Btu/h
65
48,000Btu/h
65
13.4.2 The procedure of connecting pipes
1.
Choose the pipe size according to the
specification table.
2.
Confirm the cross way of the pipes.
3.
Measure the necessary pipe length.
4.
Cut the selected pipe with pipe cutter
Make the section flat and smooth.
Lean
5.
Insulate the copper pipe
Before test operation, the joint parts should
not be heat insulated.
6.
Flare the pipe
Insert a flare nut into the pipe before flaring
the pipe
According to the following table to flare the
pipe
Max. Elevation
Ft.
m
82.2
10
32.9
82.2
10
32.9
98.7
20
65.8
164.5
25
82.2
213.8
30
98.7
213.8
30
98.7
Burr
Crude
Pipe
diameter
1/4"
(6.35)
3/8"
Ft.
(9.52)
1/2"
(12.7)
5/8"
(15.9)
3/4" (19)
After flared the pipe, the opening part must
be seal by end cover or adhesive tape to
avoid duct or exogenous impurity come into
the pipe.
7.
Drill holes if the pipes need to pass the
wall.
8.
According to the field condition to bend the
pipes so that it can pass the wall smoothly.
9.
Bind and wrap the wire together with the
insulated pipe if necessary.
10. Set the wall conduit
11. Set the supporter for the pipe.
12. Locate the pipe and fix it by supporter
For horizontal refrigerant pipe, the distance
between supporters should not be exceed
1m.
For vertical refrigerant pipe, the distance
between supporters should not be exceed
1.5m.
13. Connect the pipe to indoor unit and outdoor
unit by using two spanners.
Be sure to use two spanners and proper
torque to fasten the nut, too large torque
will damage the flare, and too small torque
may cause leakage. Refer the following
table for different pipe connection.
Pipe
Diameter
1/4" (6.35)
3/8" (9.52)
1/2" (12.7)
5/8" (15.9)
67
Flare
dimension
A
Flare shape
(mm)
Min
Max
8.3
8.7
12.0
12.4
15.4
15.8
18.6
19.1
22.9
23.3
Torque
(kgf.cm)
(N.cm)
144~176
1420~1720
333~407
3270~3990
504~616
4950~6030
630~770
6180~7540
90 ° 4
- +
A
R0.4~0.8
Sketch map
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