Mitsubishi Electric PEFY-P100VMM-E, Руководство по обслуживанию

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2. Precautions for devices that use
R410A or R407C refrigerant
Caution:
• Do not use the existing refrigerant piping.
- The old refrigerant and refrigerator oil in the existing piping con-
tains a large amount of chlorine which may cause the refrigerator
oil of the new unit to deteriorate.
• Use refrigerant piping made of phosphorus
per.
deoxidized cop-
In addition, be sure that the inner and outer surfaces
of the pipes are clean and free of hazardous sulphur, oxides,
dust/dirt, shaving particles,
minant.
oils, moisture, or any other conta-
- Contaminants on the inside of the refrigerant piping may cause
the refrigerant residual oil to deteriorate.
• Store the piping to be used during installation indoors and keep
both ends of the piping sealed until just before brazing. (Store
elbows and other joints in a plastic bag.)
- If dust, dirt, or water enters the refrigerant cycle, deterioration of
the oil and compressor trouble may result.
• Use ester oil, ether oil or alkylbenzene (small amount) as the
refrigerator oil to coat flares and flange connections.
- The refrigerator oil will degrade if it is mixed with a large amount of
mineral oil.
• Use liquid refrigerant to fill the system.
- If gas refrigerant is used to seal the system, the composition of
the refrigerant in the cylinder will change and performance may
drop.
• Do not use a refrigerant other than R410A or R407C.
- If another refrigerant (R22, etc.) is used, the chlorine in the refrig-
erant may cause the refrigerator oil to deteriorate.
• Use a vacuum pump with a reverse flow check valve.
- The vacuum pump oil may flow back into the refrigerant cycle and
cause the refrigerator oil to deteriorate.
• Do not use the following tools that are used with conventional
refrigerants.
(Gauge manifold, charge hose, gas leak detector, reverse flow
check valve, refrigerant charge base, vacuum gauge, refriger-
ant recovery equipment.)
- If the conventional refrigerant and refrigerator oil are mixed in the
R410A or R407C, the refrigerant may deteriorated.
- If
deteriorate.
water is mixed in the R410A or R407C, the refrigerator oil may
- Since R410A or R407C does not contain any chlorine, gas leak
detectors for conventional refrigerants will not react to it.
• Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
• Be especially careful when managing the tools.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant
may deteriorate.
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