Outdoor unit
5.Purging Method:
7
3-way valve
2-way valve
6.35mm(1/4")
12.7mm(1/2")
HSU-12CRA03-T
HSU-09CRA03-T
3-way valve
2-way valve
6.35mm(1/4")
9.52mm(3/8")
3-way valve
12.7mm(
1
/
2
")
2-way valve
6.35mm(
1
/
4
")
HSU-18CRA03-T
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
o
and 10 sec.)
When connecting pipe exceeds 5 meters, 20g
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 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 9K 12K:B= 5m
for 18K : B=10m
Max. Length: for 9K
: A=7m
for 12K : A=10m
m
0
2
=
A
:
K
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
