Haier HSU-07C03 Service Manual page 52

Outdoor unit
5. Purging Method:
Push the air out of the indoor unit
and piping as followes:
(1)Remove the valve cap on 2-way
valve in outdoor unit.
(2)Loosen by 1/2 turn the flare nut of
gas pipe, which is connected to
3-way valve.
(3)Loosen 2-way valve by 90
hexagon wrench, and after approx
6 sec tighten it up. Gas comes out
through flare nut on wide pipe. If no
gas is discharged, tighten flare nut
with specified torque.
(4)Open 2-way and 3-way valves
using specified torque.
(5)Tighten the caps on the valves
with specified torque.
Tighten torque N.m
Valve rod
Valve cap
When connecting pipe exceeds 5 meters, 16g refrigerant shall be added
per exceeding meter. Charge according to the following list.
Piping length
Additional amount
Note: When extending piping, air inside piping shall be removed by using external
refrigerant gas, then discharge excess refrigerant by air purging.
Brand new outdoor unit is charged 50g more refrigerant than regulated weight.
Only for first installation, this extra 50g can be used to purge air in the pipes.
During this procedure, 50g refrigerant will be discharged in piping.
(This must be strictly controlled with 90
07C03
o
using
7-9
20-25
5m 7m
No need 32g
o
48
2-way valve
3-way valve
2-way valve
6.35mm(1/4")
HSU-18CK03
HSU-18CK03C
HSU-07LD03 HSU-07LD03C
HSU-09LD03 HSU-09LD03C
HSU-12LD03 HSU-12LD03C
HSU-05C03 HSU-05C03C
HSU-07C03 HSU-07C03C
10m
80g
and 6sec
Liquid Side
6.35mm(1/4")
Gas Side
9.52mm(3/8")
12.7mm(1/2")
Flare nut
3-way valve
12.7mm(1/2")
2-way valve
6.35mm(1/4")
3-way valve
9.52mm(3/8")
12.7mm(1/2")