Haier AB072XCEAA Service Manual - Page 44

Vacuum pumping, Open all valves, Gas leakage detection, Insulation treatment

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Chff^j\bZe Abj Chg]blbhg^j Vacuum pumping 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 that 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. The insulating material at gas side shall be resistant to a temperature above 120 . The indoor unit pipe connection part shall be insulated. The notch upward (Attached detail view) Indoor unit Field piping side Subsidiary insulation tube z 42 z

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Vacuum pumping
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 that 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.
The insulating material at gas side shall be resistant to a temperature above 120
.
The indoor unit pipe connection part shall be insulated.
The notch upward (Attached detail view)
Indoor unit
Subsidiary insulation tube
Field piping side
±²³³´µ¶·¸¹ º·µ ±²»¼·½·²»´µ
±
4
2
±