Haier AB072FDAHA Installation Manual - page 11
12
Set capacity (SW05)
Electrical wiring & Application control
Wiring hole
Remote controller wiring
Application control
9
Vacuum evacuation
Open all the valves
Open all the valves of the outdoor unit.
Evacuate from the outdoor cut-off valve with a vacuum pump.
Never use encapsulated refrigerant in the outdoor unit for evacuation.
Check the gas leaking
Check the joints and valve caps with a leakage detector or with soapsuds for gas leaks.
Heat insulation
All the liquid and gas tubes must have separate isolation.
During cooling run, temperature at both the liquid side and the gas side is low. To prevent
dew forming, heat isolation must be made.
Materials used for the tube isolation at the gas side must withstand 120
temperature.
The joints should be treated for heat isolation.
With cut edge up
(Attached diagram)
Field tubing side
Auxiliary isolated tube
Indoor unit
Refrigerant piping