Mitsubishi Electric PWFY-P100VM-E-BU Data Book page 3

• After completing installation work, make sure that
refrigerant gas is not leaking.
- If the refrgerant gas leaks and s exposed to a fan
heater, stove, oven, or other heat source, t may gen-
erate noxous gases.
• Do not reconstruct or change the settings of the
protection devices.
- If the pressure swtch, thermal swtch, or other
protecton devce s shorted and operated forcbly,
or parts other than those specified by Mitsubishi
Electric are used, fire or explosion may result.
• Do not use the existing refrigerant piping.
- The old refrgerant and refrgerant ol n the exstng
ppng contans a large amount of chlorne whch
may cause the refrgerant ol of the new unt to dete-
rorate.
- R410A s a hgh-pressure refrgerant and can cause
the exstng ppng to burst.
• Use refrigerant piping made of C1220 (CU-DHP)
phosphorus deoxidized copper as specified in the
JIS H3300 "Copper and copper alloy seamless
pipes and tubes". In addition, be sure that the in-
ner and outer surfaces of the pipes are clean and
free of hazardous sulphur, oxides, dust/dirt, shav-
ing particles, oils, moisture, or any other contami-
nant.
- Contamnants on the nsde of the refrgerant ppng
may cause the refrgerant resdual ol to deterorate.
• 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, drt, or water enters the refrgerant cycle,
deteroraton of the ol and compressor trouble may
result.
• Use ester oil, ether oil or alkylbenzene (small
amount) as the refrigerant oil to coat flares and
flange connections.
- The refrgerant ol wll degrade f t s mxed wth a
large amount of mneral ol.
• Use liquid refrigerant to fill the system.
- If gas refrgerant s used to seal the system, the
composton of the refrgerant n the cylnder wll
change and performance may drop.
• To dispose of this product, consult your dealer.
• The installer and system specialist shall secure
safety against leakage according to local regula-
tion or standards.
- Followng standards may be applcable f local regu-
laton are not avalable.
• Pay a special attention to the place, such as a
basement, etc. where refrigeration gas can stay,
since refrigeration is heavier than the air.
• Do not use a refrigerant other than R410A.
- If another refrgerant (R22, etc.) s mxed wth
R410A, the chlorne n the refrgerant may cause the
refrgerant ol to deterorate.
• Use a vacuum pump with a reverse flow check
valve.
- The vacuum pump oil may flow back into the refrig-
erant cycle and cause the refrgerant ol to detero-
rate.
• 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,
refrigerant recovery equipment)
- If the conventonal refrgerant and refrgerant ol are
mxed n the R410A, the refrgerant may detero-
rated.
- If water s mxed n the R410A, the refrgerant ol
may deterorate.
- Snce R410A does not contan any chlorne, gas
leak detectors for conventonal refrgerants wll not
react to t.
• Do not use a charging cylinder.
- Usng a chargng cylnder may cause the refrgerant
to deterorate.
• Be especially careful when managing the tools.
- If dust, drt, or water gets n the refrgerant cycle, the
refrgerant may deterorate.
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