Outdoor unit
6.Purging Method:
7
3-way valve
2-way valve
6.35mm(1/4")
12.7mm(1/2")
HSU-12CVY03
HSU-18CVY03
2-way valve
9.52mm(3/8")
3-way valve
15.88mm(5/8")
HSU-22CVY03
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
When connecting pipe exceeds 5 meters, 16g refrigerant shall be added
per exceeding meter. Charge according to the following list.
Piping length
Additional amount
5m
7m
10m
No need
32g
During this procedure, 50g(18k) or 80g(24k) refrigerant will be discharged in piping.
(This must be strictly controlled within 90
o
and 10 sec.)
Brand new outdoor unit is charged 50g(18k) or 80g(24k) more refrigerant than regulated weight.
Only for first installation, this extra 50g(18k) or 80g(24k) 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.
80g
