LG HMC030KD1 Service Manual - Page 43

Valve

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3-way Valve 1. Pump down Indoor unit _FLISSt - L1771, Liquid side Open 3-Way valve Outdoor unit Gas side Closed 3-Way valve_ (DO CLOSE CLOSE Purge the air ) A • Procedure (1) Confirm that both liquid side and gas side valves are set to the open position. - Remove the valve stem caps and confirm that the valve stems are in the raised position. - Be sure to use a hexagonal wrench to operate the valve stems. (2) Operate the unit for 10 to 15 minutes. (3) Stop operation and wait for 3 minutes, then connect the charge set to the service port of the Gas side valve. - Connect the charge hose to the service port. (4) Air purging of the charge hose. - Open the low-pressure valve on the charge set slightly to air purge from the charge hose. (5) Set the liquid side valve to the closed position. (6) Operate the air conditioner in cooling mode and stop it when the gauge indicates lkg/cm2g. (7) Immediately set the Gas side valve to the closed position. - Do this quickly so that the gauge ends up indicating 3 to 5kg/cm2g. (8) Disconnect the charge set, and mount the Liquid side and Gas side valve's stem nuts and the service port nut. - Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m. - Be sure to check for gas leakage. - 43 -

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3
-way
Valve
1.
Pump
down
Indoor
unit
_FLISSt
Liquid
side
CLOSE
-
L1771,
Open
3
-Way
valve
Gas
side
(DO
Purge
the
air
Closed
3
-Way
valve_
CLOSE
Outdoor
unit
)
A
•
Procedure
(1)
Confirm
that
both
liquid
side
and
gas
side
valves
are
set
to
the
open
position.
—
Remove
the
valve
stem
caps
and
confirm
that
the
valve
stems
are
in
the
raised
position.
—
Be
sure
to
use
a
hexagonal
wrench
to
operate
the
valve
stems.
(2)
Operate
the
unit
for
10
to
15
minutes.
(3)
Stop operation
and
wait
for
3
minutes,
then
connect
the
charge
set
to
the
service
port
of
the
Gas
side
valve.
—
Connect
the
charge
hose
to
the
service
port.
(4)
Air
purging
of
the
charge
hose.
—
Open
the
low-pressure
valve
on
the
charge
set
slightly
to
air
purge
from
the
charge
hose.
(5)
Set
the
liquid
side
valve
to
the
closed
position.
-
43
-
(6)
Operate
the
air
conditioner
in
cooling
mode
and
stop
it
when
the
gauge
indicates
lkg/cm
2
g.
(7)
Immediately
set
the
Gas
side
valve
to
the
closed
position.
—
Do
this
quickly
so
that
the
gauge
ends
up
indi-
cating
3
to
5kg/cm
2
g.
(8)
Disconnect
the
charge
set,
and
mount
the
Liquid
side
and
Gas
side
valve's
stem
nuts
and
the
service
port
nut.
—
Use
torque
wrench
to
tighten
the
service
port
nut
to
a
torque
of
1.8
kg.m.
—
Be
sure
to
check
for
gas
leakage.