Purging Method - Haier HSM09HEK03 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
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, 20g refrigerant
shall be added per exceeding meter. Charge according to
the following list.
Piping length
Additional amount
Indoor unit
Outdoor unit
Max.Elevation: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 air
in pipes.
During this procedure, 50g refrigerant will be discharged in piping.
(This must be strictly controlled within 90
Outdoor unit
o
using hexagon wrench,
Tighten torque N.m
7-9
20-25
for 9k 12k
5m 7m
No need 40g
Outdoor unit
no more gas if the length of connecting pipe is less than 7m( 9K) or 10m(12K).
The height difference between any two indoor or outdoor units can not be
more than 5m.
10m
100g
M a . x L e n t g : h f r o
for 12K : A=10m
10m
Oil trap
A
Indoor unit
CAUTION
In case more than 5m
Oil trap shoud be installed every 5~7m
o
and 10 sec.)
7
3-way valve
2-way valve
9.52mm(3/8")
6.35mm(1/4")
9 K : A = 7 m