25
Installation Manual of Room Air Conditioner
1. Piping connection of the outdoor unit
Connecting the connecting pipe and inlet and
outlet liqued pipe according to the piping method.
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
o
using
hexagon wrench, and after approx.
6 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.
2-way valve
3-way valve
Liquid side
Gas side
Pipe Diameter (
)
Fastening Torque
Liquid Side 6.35mm(1/4")
Gas Side 15.88mm(1/2")
50N.m
18N.m
Forced fastening without careful
centering may damage the
threads and cause a leakage of
gas.
Liquid Side 9.52mm(3/8")
Gas Side 15.88mm(5/ 8")
60N.m
42N.m
15.88mm (5/8")
9.52mm (3/8")
Liquid side
Gas side
2-way valve
3-way valve
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.)
CAUTION
In case more than 5m
Oil trap shoud be installed every 5~7m
Max. Length: for 7K 9K : A=7m
for 12K: A=10m
for 18K 22K 24K: A=20m
Max.Elevation:
for 7K 9K 12K: 5m
for 18K 22K 24K: 10m
no more gas if the length of connecting pipe is less than 7m(••7K 9K)
••
or 10m(12K) or 20m(18K 22K 24K).
The height difference between any two indoor or outdoor units can not be
more than 5m(7K 9K 12K ) or 10m(18K 22K 24K).
A
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Oil trap
