Haier HSU-22LEA03 Service Manual page 59

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 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 7-9
Valve cap 20-25
When connecting pipe exceeds 5 meters, 20g or 60g(only for 22k) 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
weight. Only for first installation, this extra 50g
in pipes.
During this procedure, 50g
(This must be strictly controlled within 90
HSU-22L/HEA03
Outdoor unit
o
using
for 22k
5m 7m
No need 120g
or 80g
(only for 22k ) more refrigerant than regulated
or 80g
(only for 22k ) can be used to purge air
or 80g
(only for 22k )refrigerant will be discharged in piping.
o
and 10 sec.)
56
2-way valve
9.52mm(3/8")
HSU-22LEA03
HSU-22HEA03
10m
300g
: http://splitoff.ru/tehn-doc.html
Installations
ay valve
15.88mm(5/8")