Haier AB12CS1ERA Service Manual page 173

Super Match
Connection of refrigerant pipe
Conduct flared connection work to connect all refrigerant pipes.
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The connection of indoor unit pipes must use double spanners.
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The installing torque shall be as given in the following table.
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Wall thickness of connection pipe 0.8mm
Creating vacuum
With a vacuum pump, create vacuum from the stop valve of the outdoor unit. Emptying with refrigerant sealed in
the outdoor unit is absolutely forbidden.
Open all valves
Open all the valves on the outdoor unit.
Gas leakage detection
Check with a leakage detector or soap water if there is gas leakage at the pipe connections and bonnets.
Insulation treatment
Conduct insulation treatment on both the gas side and liquid side of pipes respectively. During cooling operation,
both the liquid and gas sides are cold and thus shall be insulated so as to avoid dew generation.
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The insulating material at gas side shall be resistant to a temperature
above 120°C
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The indoor unit pipe connection part shall be insulated.
In order to drain water normally, the drain pipe shall be processed as specified in the installation manual and shall
be thermal insulated to avoid dew generation. Improper hose connection may cause indoor water leakage.
Requirements
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The indoor drain pipe shall be thermal insulated.
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The connection part between the drain pipe and the indoor
unit shall be insulated so as to prevent dew generation.
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The drain pipe shall be slant downwards (greater than
1/100). The middle part shall not be of S type elbow,
otherwise abnormal sound will be produced.
■
The horizontal length of the drain pipe shall be less than 20.
In case of long pipe, supports shall be provided every 1.5 _
2m to prevent wavy form.
■ Central piping shall be laid out according to the right figure.
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Take care not to apply external force onto the drain pipe
connection part.
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For unit with water pump drain pipe use hard PVC general
purpose pipe VP which can be purchased locally. When
connecting, insert a PVC pipe end securely into the drain
socket before tightening securely using the attached drain
hose and clamp. Adhesive must not be used for connection
of the drain socket and drain hose (accessory).
Pipe and insulation material
Pipe Rigid PVC pipe VP20 mm (internal diameter)
Insulation Foamed PE with thickness above 7 mm
Connecting pipe
O.D.(mm)
Ø6.35
Ø9.52
Ø12.7
Ø15.88
CAUTION
171
Installing torque
(N-m)
11.8 (1.2kgf·m)
24.5 (2.5 kgf·m)
Double-spanner
49.0 (5.0 kgf·m)
operation
78.4 (8.0 kgf·m)