LG HMC036KDT1 Service Manual - Page 31

Pumping

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(1) Pumping dow Indoor unit H Liquid side Close 2-Way valve Outdoor unit Gas side 3-Way c valve I I11 Indoor unit . Liquid side Close 2-Way valve Gas side " --Open 3-Way valve Ilriil manifold gauge 0 Low handle AS (CLOSE) (3 ) • Hi- handle (CLOSE) el" \. IL IL 2-way, 3-way Valve • Procedure 1. Confirm that both the gas side and liquid 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 manifold gauge to the service port of the gas side valve. - Connect the hose of the gauge with the push pin to the service port. 4. Air purging of the charge hose. - Open the Low-handle valve on the gauge slightly to air purge from the hose. 5. Set the liquid side valve to the closed position. 6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates lkg/cm'g. 7. Immediately set the gas side valve to the closed position. - Do this quickly so that the gauge ends up indicating 1kg/cm g. 8. Disconnect the charge set, and mount the liquid side and gas side valve caps and the service port nut. - Use torque wrench to tighten the service port nut to a torque of 1.8kg.m.(4.2kg*m/5.5kg*m) - Be sure to check for gas leakage. Service Manual 31

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2
-way,
3
-way
Valve
(1)
Pumping
dow
Indoor
unit
Liquid
side
H
Indoor
unit
Close
2
-Way
valve
Gas
side
3
-Way
c
valve
I
I11
.
Liquid
side
Close
2
-Way
valve
Gas
side
manifold
gauge
0
(3
)
Low
•
-
handle
AS
(CLOSE)
"
--
Open
3
-Way
valve
Ilriil
Hi-
handle
(CLOSE)
Outdoor
unit
el"
\.
IL
IL
•
Procedure
1.
Confirm
that
both
the
gas
side
and
liquid
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
con-
nect
the
manifold
gauge
to
the
service
port
of
the
gas
side
valve.
-
Connect
the
hose
of
the
gauge
with
the
push
pin
to
the
service
port.
4.
Air
purging
of
the
charge
hose.
-
Open
the
Low
-handle
valve
on
the
gauge
slightly
to
air
purge
from
the
hose.
5.
Set
the
liquid
side
valve
to
the
closed
position.
6.
Operate
the
air
conditioner
at
the
cooling
cycle
and
stop
it
when
the
gauge
indicates
lkg/cm'g.
7.
Immediately
set
the
gas
side
valve
to
the
closed
position.
-
Do
this
quickly
so
that
the
gauge
ends
up
indi-
cating
1
kg/cm
g.
8.
Disconnect
the
charge
set,
and
mount
the
liquid
side
and
gas
side
valve
caps
and
the
service
port
nut.
-
Use
torque
wrench
to
tighten
the
service
port
nut
to
a
torque
of
1.8kg.m.(4.2kg*m/5.5kg*m)
-
Be
sure
to
check
for
gas
leakage.
Service
Manual
31