Installation
Page 46
The outdoor unit is installed higher than the indoor unit.
5.2 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.
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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.
Outer diameter of pipe
(inch(mm))
A (mm/inch)
Min
Max
1/4" (6.35)
0.7/0.0275
1.3/0.05
3/8" (9.52)
1.0/0.04
1.6/0.063
1/2" (12.7)
1.0/0.04
1.8/0.07
5/8" (15.9)
2.0/0.078
2.2/0.086
3/4" (19)
2.0/0.078
2.4/0.094
•
After flared the pipe, the opening part must be seal
by end cover or adhesive tape to avoid duct or exog-
enous 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 be-
tween 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
bellmouthing, and too small torque may cause
leakage. Refer the following table for different pipe
connection.
Pipe Diameter
Torque
Sketch map
N.
m(lb.ft)
1/4" (6.35)
15~16
(11~11.8)
3/8" (9.52)
25~26
(18.4~19.18)
1/2" (12.7)
35~36
(25.8~26.55)
5/8" (15.9)
45~47
(33.19~34.67)
3/4" (19)
65~67
(47.94~49.42)
Summary of Contents for Forest MOAA31-12CN1-NB8
Page 1: ...FOREST R410A ONOFF CONTROL TM_AF_R410A_ONOFF_SA_NA_2008 TECHNICAL MANUAL ...
Page 8: ...Specifications Page 8 3 2 Outdoor Unit 12k ...
Page 9: ...Specifications Page 9 18k ...
Page 10: ...Specifications Page 10 24k ...
Page 12: ...Specifications Page 12 24k ...
Page 14: ...Specifications Page 14 18k 24k ...
