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•General Control of Refrigerating Cycle
NO.
1
4
5
6
7
EEMS
Pipe and
piping system
opening time
Welding
N_sealed
parts
RefUge-_
r'a_0n time
UNIT
Min.
STANDARDS
Pipe: within 1hour.
Comp: within 10 minutes.
Drier: within 20 minutes.
Nitrogen Weld under Nitrogen
)ressure atmosphere.
(Nz pressure:
0.1-0.2 kg/cm z)
Confirm Confirm air leaking sounds
N2 leak when removing rubber cap.
Sound: usable
No sound: not usable
Min. More than 40 min_es
PURPOSES
TOprotect
moisture
penetration.
To protect oxide
scale formation.
To pre_ct
moi_ure
penetmtion+
Toremovemoisture.
REMARKS
The opening time should be reduced
to ahalf 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 applyferce to pipes beforeand
a_erwelding toprotect 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 ................._..................._...............................................................÷...................................._................................................................................
Vacul._m Tort Below 0.03 (ref) Note: Only applicable to the model
deg'ee equipped with reverse flow
protect plate.
................. *_.................. 1............................................................... ÷.................................... i ................................................................................
Vacuum =EA High and low pressure sides Vacuum efficiency can be improved
are evacuated at the saree by operating compressor during
time for models above 200 Levacuation.
Vacuum EA Use R-134a exclusive To protect mixing The rubber pipes for R-12 refrkJerant
p_oing manifold, of mineral and shall be melted when they are used for
ester oils. R-134a refrigerant (causes of leak.)
................. _ ................. 1............................................................... +.................................... +..............................................................................
Pipe EA Use R-134a exclusive. To protect R-12
coupler refrigerant mixing.
................. i................... 1............................................................... ÷.................................... _................................................................................
Ou*Jet R-134a exclusive.
(Sod_et)
Plug R*134a exclusive.
Refrigerant
weighing
Drier
replacement
Leak check
EA Use R-134a exclusively.
Weighing allowance: +5g
Note: Winter: -5g
Summer: +5g
-Use R-134a exclusively for
R-134a refdgeratoc
- Usa R-12 exclusivelyfor
R-12 refrigerator.
-Replacedrierwheneverrepaiing
refrigeratorcyclepiping.
-Do not use soapy water for
i check. It may be sucked into
the pipe by vacuum.
I
Donot mix with
R+I2refrigerant,
Toremove the
moisture from
pipeinside,
Defect
refrigerant leak
area.
-Donot weigh the refrigerant at too
hot or too cold an area.
(77°F[25=C] Js adequate.)
- MakeCopperbombe(Devicefillingrefrigerant)
Socket: 2SV Plug: 2PV R-134a
Note: Do not bum O-dng (bushing)
during welding.
-Check oil leak at refrigerant leak
Iarea. Use electronic leak detector if
oil leak is not found.
-The electronic leak detector isvery
sensitive to halogen gas in the air. It
also sen detect R-141b in urethane.
Practice many times before using
this type of detector.
I-15-
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