LG LRTPC1831W User Manual page 11

• General Control of Refrigerating Cycle
NO. ITEMS UNIT
1 Pipe and Min.
piping system
opening time
2
4
6
7
Welding Nitrogen
pressure
N2sealed Confirm
parts N2 leak
Refnge-Evacu_
ra[_n time
STANDARDS
Pipe: within 1 hour,
Comp: within 10 minutes.
Drier: within 20 minutes.
Weld under Nitrogen
atmosphere.
(N2 pressure:
0.1-0,2 kg/cm 2)
Confirm air leaking sounds
when removing rubber cap.
Sound: usable
No sound: not usable
Min. More than 40 minutes
PURPOSES
To protect
moisture
penetration.
To protect oxide
scale formation.
To protect
moisture
penetration.
Toremove 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 not apply force to pipes beforeand
after welding to protect pipe from cracking.
- In case of evaporator parts, if it
doesn't make sound when removing
rubber cap, blow dry air or N2gas for
more than 1 rain and use the parts.
Cycle
Vacuum Torr Below 0.03 (ref) 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,)
Pipe EA Use R-134a exclusive, To protect R-12
coupler refrigerant mixing,
Outlet R-134a exclusive,
(Socket)
Plug
Refrigerant
weighing
Drier
replacement
EA
Leak check
R-134a exclusive.
Use R-134a exclusively,
Weighing allowance: ±5g
Note: Winter: -5g
Summer: +5g
- Use R-134a exclusively for
R-134a refrigerator.
- Use R-12 exclusively for
R-12 refrigerator,
- Replace drierwhenever repairing
refrigeratorcyclepiping.
- Do not use soapy water for
check. It may be sucked into
the pipe by vacuum.
-15
Do not mix with
R-12 refrigerant,
To remove the
moisture from
pipe inside.
Defect
refrigerant leak
area.
- Do not weigh the refrigerant at too
hot or too cold an area.
(77°F[25°C] is adequate.)
- MakeCopperbombe(Device f_Iling refrigerant)
Socket: 2SV Plug: 2PV R-134a
Note: Do not burn O-ring (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,