Table of Contents
Advertisement
Note:
1. When connecting the outdoor branch pipe and the outdoor, please pay attention to the outdoor pipe dimension.
2. When adjusting the diameter among outdoor branch pipe and among the units, please do execute at the branch
pipe side.
3. Please install the outdoor branch pipe (suction gas/HP gas/liquid side) in horizontal or vertical direction.
4. When welding with hard solder, please do blow nitrogen. If not, a number of oxides will be produced and cause
heavy damage.Besides, prevent water and dust going into the pipe, please make the brim as outer roll.
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 and water, impurities (welding after being flatted, 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 suction gas pipe /HP gas pipe and the refrigerant distributing pipe, as well as the refrigerant
distributing pipe and the branch pipe should be welded with hard solder.
■
When doing the braze connection, please do the following: Braze the pipe while charging the nitrogen. Or it will
cause a number of impurities (a film of oxidation) to clog the capillary and the expansion valve, further cause the
deadly failure.
Prepare on field
Right
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
Seal the connection and wrap the
heat insulator with adhesive tape
Horizontal
Floor
Projecting length of pipe to be expanded:B(mm)
Pipe outer
diameter
Special tool
(mm)
for R410A
Ø6.35
Ø9.52
Ø12.7
Ø15.88
77
Floor
Wrong
When it is hard pipe
The former
tool
0-0.5
1.0-1.5
Advertisement
Table of Contents
