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8
• Gas leakage inspection
After the pipieline connection is done, use a leakage inspection device or soap suds to carefully check
if there is any leakage at the joints. This is an important step to ensure the quality of installation. Once
a leakage is detected, proper treatment should be taken immediately.
Pipelines connection for Split type quick coupler model
• If you purchase the machine for split type quick coupler model,please adopt the following
pipeplines connection procedures:
1. Remove the dust caps from the indoor and outdoor units, and the
connecting pipe.
2. Align the joint counter of connecting pipe with the proper indoor
and outdoor joint conic surfaces,tighten the connecting nut
manually. Then make it secure with a wrench as shown Fig.7,
applying to above torque Table 1.
3. Remove the two valve core caps from the outdoor unit.
4. Turn on the high and low pressure valve cores with
an socket wrench,then tighten the two valve core
caps of the outdoor unit (Fig.8).
5. Finally ,wrap the hot insulating cotton around the
joints of indoor and outdoor units.
p
Notes on installation of quick coupler:
1. Connecting pipe bending minimum radius parameters (Table 3)
2. Quick coupler assembly and disassembly limit: the assembly and disassembly times are
inadvisably more than 7.
Table 3
Minimum bending radius
Normial diameter(mm)
Minimum bending
radius(mm)
cooling capacity
DN8(5/16”)
80(3”)
2100~2300W
(7000-8000BTU)
DN10-12
(1/2”)
100(4”)
2500~5100W
(9000-18000BTU)
DN14-16
(5/8”)
150(6”)
6100~7000W
(22000-24000BTU)
Spanner
Rorque
wrench
Joint
Nut of
connection
pipe
Quick coupler
(wrapping with insulating cotton)
Low pressure valve
Valve core cap
High pressure valve
Fig. 7
Fig. 8