Outdoor unit
7
3-way valve
15.88mm(5/8")
2-way valve
9.52mm(3/8")
HSU-22LE04
3-way valve
2-way valve
6.35mm(1/4")
12.7mm(1/2")
HSU-18LE04
HSU-12LE04
HSU-09LE04
3-way valve
2-way valve
6.35mm(1/4")
9.52mm(3/8")
5.Purging Method:
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
o
and 10 sec.)
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
5m
7m
No need
40g
10m
100g
for 7k 9k 12k 18k
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
o
using 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.
Valve rod
Valve cap
7-9
20-25
Tighten torque N.m
for 22k 24k
for 7K 9K 12K: B=5m
for 18K 22K 24K: B=10m
Piping length
Additional amount
5m
7m
No need
120g
10m
300g
20m
900g
Max. Length: for 7K 9K
: A=7m
for 12K : A=10m
m
0
2
=
A
:
K22K 24K
8
1
r
o
f
Max.Elevation:
C
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Oil trap
A
B
Outdoor unit
Indoor unit
A
B
A
B
CAUTION
In case more than 5 metres
，
oil trap
should be installed every 5~7m.
C
FJT-24L
FJT-18L
15.88mm(5/8")
FJT-12L
HSU-07LD03
12.7mm(1/2")
