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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
is conneted to 3-way valve.
(3) Loosen 2-way valve by 90
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.
Valve rod
Valve cap
When connecting pipe exceeds 5 meters, 60g refrigerant shall be added per
exceeding meter. Charge according to the following list.
Piping length
Additional amount
Indoor unit
A
B
Outdoor unit
Max.Elevation:B=10m
Max. Length:A=20m
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 80g more refrigerant than
regulated weight. Only for first installation, this extra 80g can be used to purge air in pipes.
During this procedure, 80g refrigerant will be discharged piping.
(This must be strictly controlled within 90
Outdoor unit
o
using hexagon wrench,
Tighten torque N.m
7-9
20-25
for
5m
No need
A
Outdoor unit
B
Indoor unit
2-way valve
9.52mm(3/8")
24k 30k
7m
10m
300g
120g
Outdoor unit
CAUTION
In case more than 5 metres，oil trap
should be installed every 5~7m.
o
and 10 sec.)
7
2-way valve
9.52mm(3/8")
3-way valve
15.88mm(5/8")
HSU-24HEA03(T3)
HSU-24LEA03(T3)
HSU-24HEA13(T3)
HSU-24LEA13(T3)
3-way valve
15.88mm(5/8")
HSU-30HEA13(T3)
HSU-30HEA03(T3)
20m
900g
A
Oil trap
C
Indoor unit
B
C
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