Haier HSU-12LV03 Service Manual page 18

6.Purging Method:To use vacuum pump
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 conneted to
3-way valve.
(3) Loosen 2-way valve by 90
hexagon wrench, and after approx.
10 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, charge according to the following list.
Brand new outdoor unit is charged 50g or 80g(only for 22k unit) more refrigerant than regulated weight.
Only for first installation, this extra 50g or 80g(only for 22k unit) can be used to purge air in pipes.
During this procedure, 50g or 80g(only for 22k and 24k unit) refrigerant will be discharged in piping.
(This must be strictly controlled within 90
Air Conditioner Air Conditioner
INSTALLATION
o
using
7-9
20-25
5m 7m
32g
No need
o
and 10 sec.)
2-way valve
6.35mm(1/4")
HSU-18LV03
HSU-22LV03
HSU-09LV03
HSU-12LV03
HSU-09HV03
HSU-12HV03
10m
80g
14
Edition:2006/8/20 Edition:2006/8/20
3-way valve
12.7mm(1/2")
15.88mm(5/8")
2-way valve
6.35mm(1/4")
3-way valve
9.52mm(3/8")
12.7mm(1/2")