10
Installation instruction
Note:
1. When connecting the pipe and the outdoor, please pay attention to the outdoor pipe dimension.
2. When adjusting the diameter among pipes and among the units, please must execute at the branch pipe side.
3. When welding with hard solder, please must blow nitrogen. If not, a number of oxide will be produced and cause heavy
damage.Besides,to prevent water and dust into the pipe, please make the brim as outer roll.
Adhesive side
Prepare on eld
Seal the connection and wrap the
heat insulator with adhesive tape
Cut off pipe with the cutter
Cut off at the middle
• Gas pipe and liquid pipe should be heat insulated separately.
• The material for gas pipe should endure the high temperature
over 120°C.That for liquid pipe should be over 70°C.
• The material thickness should be over 10mm, when ambient
temp. is 30°C, and the relative humidity is over 80%, the material
thickness should be over 15mm.
• He material should cling the pipe closely without gap, then be
wrapped with adhesive tape. The connection wire can not be put
together with the heat insulation material and should be far at
least 20cm.
Heat insulation
• In operation, the pipe will vibrate and expand or shrink. If not being xed, the refrigerant will focus on one part to cause
the broken pipe.
• To prevent the central stress, x the pipe for every 2-3m.
Fix the refrigerant pipe
Connection wire
over 20cm
Adhesive tape
Gas pipe
Heat insulator
Liquid pipe
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 atted, 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 ared 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 are 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.
Pipe outer diameter
(mm)
A
Ø6.35 9.1
Ø9.52 13.2
Ø12.7 16.6
Ø15.88 19.7
Expanding pipe: A(mm)
Pipe outer diameter
(mm)
When it is hard pipe
Special tool
for R410A
The former
tool
Ø6.35
0-0.5 1.0-1.5
Ø9.52
Ø12.7
Ø15.88
Projecting length of pipe to be expanded: B(mm)
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