Eco Air CTBU-09HWFN1-M(C), Service Manual, Page: 91 / 219

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Do not lean it more than 45, and do not lay it
sidelong.
Make concrete foundation according to the
specifications of the outdoor units.
Fasten the feet of this unit with bolts firmly to
prevent it from collapsing in case of earthquake
or strong wind.
13.4 Refrigerant pipe installation
13.4.1 Maximum pipe length and height
drop
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.
Model
Max. Length Max. Elevation
m Ft. m Ft.
9,000Btu/h 25 82.2 10 32.9
12,000Btu/h 25 82.2 10 32.9
18,000Btu/h 30 98.7 20 65.8
24,000Btu/h 50 164.5 25 82.2
36,000Btu/h 65 213.8 30 98.7
48,000Btu/h 65 213.8 30 98.7
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.
9
0
L e a n
C r u d e
B u r r
o
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
Pipe
diameter
Flare
dimension A
(mm)
Flare shape
Min Max
1/4"
(6.35)
8.3 8.7
R 0 . 4 ~ 0 .8
A
4 5 °
9 0
°
4
-
+
3/8"
(9.52)
12.0 12.4
1/2"
(12.7)
15.4 15.8
5/8"
(15.9)
18.6 19.1
3/4" (19) 22.9 23.3

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