Mitsubishi Electric PURY-M200YNW-A1 Service Handbook page 7

Use the following tools specifically de-
signed for use with the specified refriger-
ant: Gauge manifold, charge hose, gas leak
detector, check valve, refrigerant charge
base, vacuum gauge, and refrigerant recov-
ery equipment.
Gas leak detectors for conventional refrigerants will not
react to a refrigerant that does not contain chlorine.
If the specified refrigerant is mixed with water, refriger-
ant oil, or another refrigerant, the refrigerant oil will de-
teriorate and the compressor will malfunction.
Use a vacuum pump with a check valve.
If the vacuum pump oil flows back into the refrigerant
lines, the refrigerant oil may deteriorate and the com-
pressor may malfunction.
Keep tools clean.
If dust, dirt, or water accumulates on the charging hose
or the flare processing tool, the refrigerant will deterio-
rate and the compressor will malfunction.
Use refrigerant piping made of phosphorus
deoxidized copper (copper and copper alloy
seamless pipes) that meets local require-
ments. Pipe joints should also meet local re-
quirements. Keep the inner and outer
surfaces of the pipes clean and free of sul-
phur, oxides, dust/dirt, shaving particles,
oils, moisture, or any other contaminants.
Contaminants on the inside of the refrigerant piping will
cause the refrigerant oil to deteriorate and cause the
compressor to malfunction.
Store pipes indoors, and keep both ends of
the pipes sealed until just before making a
flare connection or brazing. (Store elbows
and other joints in plastic bags.)
If dust, dirt, or water enters the refrigerant lines, the re-
frigerant oil will deteriorate and the compressor will
malfunction.
Braze the pipes with a nitrogen purge to
avoid oxidation.
Oxidized flux inside the refrigerant pipes will cause the
refrigerant oil to deteriorate and cause the compressor
to malfunction.
Do not use existing refrigerant piping.
The old refrigerant and refrigerant oil in the existing pip-
ing contain a large amount of chlorine, which will cause
the refrigerant oil in the new unit to deteriorate and
cause the compressor to malfunction.
If a large electric current flows due to a mal-
function or faulty wiring, earth-leakage
breakers on the unit side and on the up-
stream side of the power supply system
could both operate. Depending on the im-
portance of the system, separate the power
supply system or take protective coordina-
tion of breakers.
This appliance is intended to be used by ex-
pert or trained users in shops, in light indus-
try and on farms, or for commercial use by
lay persons.
This appliance is not intended for use by
persons (including children) with reduced
physical, sensory or mental capabilities, or
lack of experience and knowledge, unless
they have been given supervision or in-
struction concerning use of the appliance
by a person responsible for their safety.
Store the unit in a room large enough to al-
low clearance in the event of refrigerant
leakage.
Refrigerant R32 is flammable. Do not use a
naked-flame type detector.
Only qualified personnel may touch the
USB port in the control box.
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