Purging Method - Haier HSU-18CK03 - annexe 1 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 or 60g
(only for 22k 24k) refrigerant shall be added per exceeding
meter. Charge according to the following list.
Piping length
Additional amount
Piping length
Additional amount
Indoor unit
A
Outdoor unit
Max.Elevation:
Max. Length:
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(22k,24k) more refrigerant than regulated weight. Only for
first installation, this extra 50g or 80g(22k,24k) can be used to purge airin pipes.
During this procedure, 50g or 80g(22k,24k) 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 7k 9k 12k 18k
5m 7m
No need 40g
for 22k 24k
5m 7m 10m
300g
120g
No need
A
B
B
Indoor unit
for 7K 9K 12K: B=5m
for 18K 22K 24K: B=10m
for 7K 9K : A=7m
for 12K : A=10m
f r o 1 8 K22K 24K : A = 2
o
and 10 sec.)
10m
100g
20m
900g
Outdoor unit
Outdoor unit
CAUTION
In case more than 5 metres，oil trap
should be installed every 5~7m.
0 m
7
3-way valve
2-way valve 12.7mm(1/2")
6.35mm(1/4") 15.88mm(5/8")
HSU-18LE03 HSU-18CK0307
HSU-22LE03 HSU-24CG0307
HSU-18CK03
HSU-24LE03
HSU-12LX03
FJT-18L
FJT-24L
2-way valve
6.35mm(1/4")
3-way valve
9.52mm(3/8")
12.7mm(1/2")
HSU-05LE03
HSU-09LD0307
HSU-07LE03
HSU-12LD0307
FJT-12L
HSU-09LE03
HSU-12LE03
A
Oil trap
C
Indoor unit
B
C