6
CAUTION
7 INSTALL THE CONNECTING PIPE
Check whether the differance in height between the indoor unit and
outdoor unit, the length of refrigerant pipe, and the number of the
bends meet the following requirements:
7.1 Refrigerant piping
Front out pipe
Back out pipe
Side out pipe
Undersurface out pipe
Fat pipe
1
2
~16kW
●
Please pay attention to avoid the components where it is
connecting to the connecting pipes.
●
To prevent the refrigerant piping from oxidizing inside when
welding, it is necessary to charge nitrogen, or oxide will chock
the circulation system.
1) The indoor and outdoor connecting pipe interface and power
cable outlet.
Can select various piping and wiring patterns such as out from the
front, the back, the side and undersurface etc.
（
The follow display
the locations of several piping and wiring knock-off interfaces
）
CAUTION
●
Side out pipe: please remove the L-shape metal plate, otherwise
can not wiring.
●
Back out pipe:
Undersurface outlet pipe: the knock out should from inside to
outside, and then piping and wiring through this.Pay attention to
the piping, the fat connecting pipe should out from the largest
hole, otherwise the pipes will be rubbed. Please do the moth
proofing for the knocked out hole, to avoid the pest processing
into and destroy the components.
Please wipe off the piping support rubber blanket beside the
inner outlet pipe cover of the machine while back side getting
out pipes.
The unit body
Affiliated heat pump belt
Site pipe side
Cut from upward
7.3 Heat Insulation
Do the heat insulation to the pipes of gas side and liquid side
separately. The temperature of the pipes of gas side and liquid side
when cooling, for avoiding condensation please do the heat
insulation fully.
1) The gas side pipe should use closed cell foamed insulation
material, which the fire-retardant is B1 grade and the heat
resistance over 120
℃
.
2) When the external diameter of copper
pipe≤Φ12.7mm,
the
thickness of the insulating layer at least more than 15mm;
When the external diameter of copper
pipe≥Φ15.9mm,
the
thickness of the insulating layer at least more than 20mm.
3) Please use attached heat-insulating materials do the heat
insulation without clearance for the connecting parts of the indoor
unit pipes.
Check point of indoor unit
Check point of outdoor unit
D
A
B
C
A
B
Check point of outdoor unit
7.2 Leakage Detection
Use soap water or leakage detector to check every joint whether
leak or not (Refer to Fig.7-3 ).Note:
A is low pressure side stop valve
B is high pressure side stop valve
C and D is connecting pipes interface of indoor and outdoor units
1
2
gas
liqulid
Fig.7-2
Fig.7-3
Fig.7-4
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