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Installation procedure
Adhesive side
Cut off pipe with the cutter
Cut off at the middle
Pipe installation
When doing the piping connection, please do the following:
• Please don't let the pipe and the parts in the unit collide each other.
• When connecting the pipes, close the valves fully.
• Protect the pipe end against the water, impurity into the pipes (welding after being flat, or
being sealed with adhesive tape).
• Bend the pipe as large semi-diameter as possible(over 4 times of the pipe diameter).
• The connection between outdoor liquid pipe and the distributing pipe is flared type. Please
expand the pipe with the special tool for R410A after installing the expanding nut. But if the
projecting pipe length has been adjusted with the copper pipe gauge, you can use the original
tool to expand the pipe.
• Since the unit is with R410A, the expanding oil is ester oil, not the mineral oil.
• When doing the flare connection, please do the following: When connecting the expanding
pipe, fasten the pipes with double-spanner. The torque refers to the former info.
• The outdoor gas pipe and the refrigerant distributing pipe, as well the refrigerant distributing
pipe and the branch pipe should be welded with hard solder.
• When doing the braze connection, please do the following: Brazing the pipe at the same
time charge the nitrogen. Or it will cause a number of impurity (a film of oxidation) to clog the
capillary and the expansion valve, further cause the deadly failure.
Prepare on field
Expanding pipe:A(mm)
Pipe outer
diameter
A
(mm)
Ø6.35
9.1
Ø9.52
13.2
Ø12.7
16.6
Ø15.88
19.7
Horizontal
Floor
Right
Projecting length of pipe to be expanded:B(mm)
Pipe outer
diameter
16
Seal the connection and wrap the
heat insulator with adhesive tape
Wrong
When it is hard pipe
Special tool
(mm)
for R410A
Ø6.35
Ø9.52
0-0.5
Ø12.7
Ø15.88
Floor
The former
tool
1.0-1.5
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