Outdoor unit
5.Purging Method:
3-way valve
2-way valve
6.35mm(1/4")
12.7mm(1/2")
HSU-18C13
HSU-12C13
HSU-09C13
HSU-24C13
HSU-12C03/Z1
HSU-09C03/Z1
HSU-12C12
HSU-09C12
HSU-22C13
3-way valve
2-way valve
9.52mm(3/8")
6.35mm(1/4")
9.52mm(3/8")
15.88mm(5/8")
12.7mm(1/2")
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.
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
During this procedure, 50g or 80g(only for 22k and 24k unit) refrigerant will be discharged in piping.
(This must be strictly controlled within 90
o
and 10 sec.)
Brand new outdoor unit is charged 50g or 80g(only for 22k and 24k unit) more refrigerant than regulated weight.
Only for first installation, this extra 50g or 80g(only for 22k and 24k unit) can be used to purge air in pipes.
Note: When extending piping, air inside piping shall be removed by using external
refrigerant gas, charge according to the following list.
HSU-18CK03
7
When connecting pipe exceeds 5 meters, 20g or 60g(only for 22k) 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
Piping length
Additional amount
5m
7m
No need
120g
10m
300g
for 22k 24k
