LG HMC030KD1 Service Manual - Page 47

3.

Gas

Charging

(After

Evacuation)

Indoor

unit

Charging

cylinder

Liquid

side

Open

3

-Way

valve

—

17-2

%

Gas

side

VITO'

Check

valve

(1)

OPEN

47

?-

;1

—

CLOSE

0

Open

3

-Way

valve

Outdoor

unit

_1

L

•

Procedure

(1)

Connect

the

charge

hose

to

the

charging

cylinder.

—

Connect

the

charge

hose

which

you

dis-con-

nected

from

the

vacuum

pump

to

the

valve

at

the

bottom

of

the

cylinder.

—

If

you

are

using

a

gas

cylinder,

also

use

a

scale

and

reverse

the

cylinder

so

that

the

sys-

tem

can

be

charged

with

liquid.

(2)

Purge

the

air

from

the

charge

hose.

—

Open

the

valve

at

the

bottom

of

the

cylinder

and

press

the

check

valve

on

the

charge

set

to

purge

the

air.

(Be

careful

of

the

liquid

refriger-

ant).

The

procedure

is

the

same

if

using

a

gas

cylinder.

(3)

Open

the

valve

(Lo

side

on

the

charge

set

and

charge

the

system

with

liquid

refrigerant.

—

If

the

system

can

not

be

charged

with

the

spec-

ified

amount

of

refrigerant,

it

can

be

charged

with

a

little

at

a

time

(approximately

150g

each

time)

while

operating

the

air

conditioner

in

the

cooling

cycle;

however,

one

time

is

not

suffi-

cient,

wait

approximately

1

minute

and

then

repeat

the

procedure

(pumping

down

-pin).

This

is

different

from

previous

procedures.

Because

you

are

charging

with

liquid

refrigerant

from

the

gas

side,

absolutely

do

not

attempt

to

charge

with

larger

amounts

of

liquid

refrigerant

while

operating

the

air

conditioner.

(4)

Immediately

disconnect

the

charge

hose

from

the

3

-way

valve's

service

port.

—

Stopping

partway

will

allow

the

gas

to

be

dis-

charged.

—

If

the

system

has

been

charged

with

liquid

refrigerant

while

operating

the

air

conditioner

turn

off

the

air

conditioner

before

disconnecting

the

hose.

(5)

Mount

the

valve

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.

-

47

-

LG HMC030KD1 Service Manual - Page 47

Charging

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