Outdoor unit
6.Purging Method:To use vacuum pump
7
3-way valve
2-way valve
9.52mm(3/8")
15.88mm(5/8")
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,
60
g refrigerant shall be added
per exceeding meter. Charge according to the following list.
Piping length
Additional amount
5m 7m
10m
No need
g
During this procedure,
80g refrigerant will be discharged in piping.
(This must be strictly controlled within 90
o
and 10 sec.)
Brand new outdoor unit is charged
80g more refrigerant than regulated weight.
Only for first installation, this extra
80g 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.
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