Purging Method - Haier HSU-09HEA03/ - annexe 3 Installation Manual

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
Valve cap
When connecting pipe exceeds 5 meters, 20g refrigerant shall be added per exceeding meter.
Charge according to the following list.
Piping length
Additional amount
Indoor unit
A
Outdoor unit
Max.Elevation:B= 5m
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 more refrigerant than regulated weight. Only for
first installation, this extra 50g can be used to purge airin pipes.
During this procedure, 50g refrigerant will be discharged in piping.(This must be
strictly controlled within 90
Outdoor unit
o
using
7-9
20-25
for 108 138
5m
No need
A
B
B
Indoor unit
Max. Length: A=7m
o
and 10 sec.)
10m
7m
40g 100g
Outdoor unit
Outdoor unit
CAUTION
In case more than 5 metres，oil trap
should be installed every 5~7m.
7
2-way valve
3-way valve
6.35mm(1/4")
9.52mm(3/8")
6.35mm(1/4")
12.7mm(1/2")
HSU-108HEA03
HSU-108HEA03-M
HSU-108HEA03-S
HSU-138HEA03
HSU-138HEA03-M
HSU-138HEA03-S
A
Oil trap
C
Indoor unit
B
C