LG LRTB1821W User Manual page 13

• General Control of Refdgerating Cycle
NO,
1
5
6
7
iTEMS
Pipe and
piping system
openingtime
Welding
N2 sealed
parts
Reffig_ EwoJaJm
rain
UNIT
Min.
STANDARDS
Pipe: within 1 hour.
Comp: within 10 minutes.
Drier: within 20 minutes.
Nitrogen Weld under Nitrogen
pressure atmosphere.
(N2 pressure:
0.1-0.2 kg/cm 2)
Confirm Confirm air leaking sounds
N21eak when removing rubber cap.
Sound: usable
No sound: not usable
Min. ; More than 40 minutes
PURPOSES
To protect
moisture
)enetretion.
To protect oxide
scale formation.
i To protect
moisture
penetration.
To remove moisture.
REMARKS
The opening time should be reduced
to a half of the standards during rain
and rainy seasons (the penetration of
water into the pipe is dangerous).
- Refer to repair note in each part.
- R-134a refrigerant is more
susceptible to leaks than R-12 and
requires more care during welding.
- Do nct apply rome to pipes befere and
after welding to protect pipe fTom cracking.
- In case of evaporator parts, if it
doesn't make sound when removing
rubber cap, blow dry air or N2 gas for
more than 1 min and use the parts.
Cycle ...................................................................................................................
Vacuum Torr Below 0.03 (tel) Note: Only applicable to the model
degree equipped with reverse flow
protect plate.
Vacuum EA High and low pressure sides Vacuum efficiency can be improved
are evacuated at the same by operating compressor during
time for models above 200 L evacuation.
Vacuum EA Use R-134a exclusive To protect mixing The rubber pipes for R-12 refrigerant
piping manifold, of mineral and shall be melted when they are used for
ester oils. R-134a refrigerant (causes of leak.)
i Pipe EA Use R-134a exclusive, To protect R-12
coupler refrigerant mixing.
OuUet R-134a exclusive.
(Sad,et)
Rug
Refrigerant
weighing
Drier
replacement
Leak check
R-134a exclusive.
EA
Use R-134a exclusively.
Weighing allowance: ±5g
Note: Winter: -5g
Summer: +Sg
- Use R-134a exclusively for
R-134a refrigerator.
- Use R-12 exclusively for
R-12 refrigerator.
- Repbce ciierwhenever repanng
re_gerator cycle p ip_g
- Do not use soapy water for
check. It may be sucked into
the pipe by vacuum.
Do not mix with
R-12 refrigerant.
To remove the
moisture from
pipe inside.
Defect
refrigerant leak
area.
-15-
- Do not weigh the refrigerant at too
hot or too cold an area.
(77°F[25°C] is adequate.)
- M_e Copper b ombe (Oe_e 5tSng re_aar_)
Socket: 2SV Plug: 2PV R-134a
Note: Do not burn O-dng (bushing)
during welding.
- Check oil leak at refrigerant leak
area. Use electronic leak detector if
oil leak is not found.
- The electronic leak detector is very
sensitive to halogen gas in the air. it
also can detect R-141b in urethane.
Practice many times before using
this type of detector.