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• General Control of Refrigerating Cycle
NO, ITEMS UNIT STANDARDS
1 Pipe and Min. Pipe: within 1 hour.
piping system Comp: within 10 minutes.
opening time Drier: within 20 minutes.
Welding Nitrogen Weld under Nitrogen
pressure atmosphere.
(N2 pressure:
0.1~0.2 kg/cm =)
N2sealed Confirm Confirm air leaking sounds
parts N2leak when removing rubber cap.
Sound: usable
No sound: not usable
Range-_ Min. More than 40 minutes
ram _mo
PURPOSES
To protect
moisture
penetration.
To protect oxide
scale formation.
To protect
moisture
penetration.
Toremovemoisture.
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 isdangerous).
- Refer to repair note in each part.
- R-134a refrigerant is more
susceptible to leaks than R-12 and
requires more care during welding.
- Donot apply fe,'ce to pipesbef_e and
after welding to protect pipefrom crad_ng.
- In case of evaporater parts, if it
doesn't make sound when removing
rubber cap, blow dry air or N_gas for
more than 1 min and use the parts.
Cycle ..................T.................._...............................................................+....................................,................................................................................
Vacuum Ton" Below 0.03 (ref) Note: Onlu 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 dudng
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-f34a refngerant (causes of leak).
Pipe EA Use R-134a exclusive. To protect R-12
coupler refrigerant mixing.
................................................................................................ ÷ .................................... _...............................................................................
Outlet R-134a exclusive.
(Socket)
Plug R*134a exclusive.
Refrigerant EA Use R-134a exclusively.
weighing Weighing allowance: -+5g
Note: Winter: -Sg
Summer: +5g
Dder
replacement
Leak check
- Use R-134a exclusively for
R-134a refrigerator.
- Use R-12 exclusively for
R-f 2 refrigerator.
- Replaced_ier_mever mp_og
re_geratorcyclepip_.
- 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.
- Do not weigh the refrigerant at too
hot or too cold an area.
(77°F[25°C] is adequate.)
- Make Copper bembe
Socket: 2SV Plug: 2PV R-134a
Note: Do not bum O-ring (rubber)
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.
Please practice, therefore, many
times before usa.
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