LG LS-H2423WM0 User Manual download pdf (Page 26)

Installation

Manual

25

Installation

Soap

water

method

1.

Remove

the

caps

from

the

2-way

and

3-way

valves.

2.

Remove

the

service-port

cap

from

the

3-way

valve.

3.

To

open

the

2-way

valve

turn

the

valve

stem

counterclockwise

approximately

90°,

wait

for

about

2~3

sec,

and

close

it.

4.

Apply

a

soap

water

or

a

liquid

neutral

detergent

on

the

indoor

unit

connection

or

outdoor

unit

connections

by

a

soft

brush

to

check

for

leakage

of

the

connecting

points

of

the

piping.

5.

If

bubbles

come

out,

the

pipes

have

leakage

Evacuation

1.

Connect

the

charge

hose

end

described

in

the

preceding

steps

to

the

vacuum

pump

to

evacuate

the

tubing

and

indoor

unit.

Confirm

the

"Lo"

knob

of

the

manifold

valve

is

open.

Then,

run

the

vacuum

pump.

The

operation

time

for

evacuation

varies

with

tubing

length

and

capacity

of

the

pump.

The

following

table

shows

the

time

required

for

evacuation.

2.

When

the

desired

vacuum

is

reached,

close

the

"Lo"

knob

of

the

manifold

valve

and

stop

the

vacuum

pump.

Finishing

the

job

1.

With

a

service

valve

wrench,

turn

the

valve

stem

of

liquid

side

valve

counter-clockwise

to

fully

open

the

valve.

2.

Turn

the

valve

stem

of

gas

side

valve

counter-

clockwise

to

fully

open

the

valve.

3.

Loosen

the

charge

hose

connected

to

the

gas

side

service

port

slightly

to

release

the

pressure,

then

remove

the

hose.

4.

Replace

the

flare

nut

and

its

bonnet

on

the

gas

side

service

port

and

fasten

the

flare

nut

securely

with

an

adjustable

wrench.

This

process

is

very

important

to

prevent

leakage

from

the

system.

5.

Replace

the

valve

caps

at

both

gas

and

liquid

side

service

valves

and

fasten

them

tight.

This

completes

air

purging

with

a

vacuum

pump.

The

air

conditioner

is

now

ready

to

test

run.

Gas

side

Liquid

side

Cap

Hexagonal

wrench

2-way

valve

(Open)

3-way

valve

(Close)

Required

time

for

evacuation

when

30

gal/h

vacuum

pump

is

used

10

min.

or

more

15

min.

or

more

If

tubing

length

is

less

than

10m

(33

ft)

If

tubing

length

is

longer

than

10m

(33

ft)

Indoor

unit

Outdoor

unit

Lo

Hi

Manifold

valve

Vacuum

pump

Pressure

gauge

Open

Close

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