Haier 10571223 Operation Manual page 31

Installation procedures
3. Piping connection of outdoor unit.
Connect the connecting pipe and inlet and outlet liquid pipe according to the piping
method.
4.Purging method
Discharge the air out of the indoor unit and the refrigerant pipe by vacuumizing
(1) Fasten all the nuts of the indoor and outdoor pipes to make these parts out of leakage.
(2) Under the condition of the complete close of the indoor and outdoor valve center (both
liquid and gas side),dismount the repair valve cap.Vacuumizing through the charge
mouth of the repair valve.
(3) After vacuumizing fasten the repair valve,and dismount the cap of the big and small
stop valve,then loosen the stop valve center completely and fasten the big and small
stop valve.
5.Extra charging amount of the refrigerant
When piping is longer than 5 m, charge additional refrigerant specified in this list.
Pipe length
Refrigerant charge (g)
5m 10m 15m
250
28
20m
500 750
25m
30m
1000
1250