INVENTOR DR2VI32-09WFI Benutzer- & Installationshandbuch Seite 18

Safety Precautions
Precautions for Handling Units for Use with R32
Do not use the existing refrigerant piping.
●The old refrigerant and refrigerator oil in the existing piping
contain a large amount of chlorine, which will cause the
refrigerator oil in the new unit to deteriorate.
●R32 is a high-pressure refrigerant, and the use of the existing
piping may result in bursting.
Keep the inner and outer surfaces of the pipes clean and
free of contaminants such as sulfur, oxides, dust/dirt shaving
particles,oils,and moisture.
●Contaminants inside the refrigerant piping will cause the
refrigerant oil to deteriorate.
Store the piping to be used during installation indoors, and keep
both ends of the piping sealed until immediately before brazing.
(keep elbows and other joints wrapped in plastic.)
●If dust, dirt, or water enters the refrigerant cycle, it may cause
the oil in the unit to deteriorate or may cause the compressor to
malfunction.
Use a small amount of ester oil, ether oil, or alkylbenzene to coat
flares and flange connections.
●A large amount of mineral oil will cause the refrigerating
machine oil to deteriorate.
Use liquid refrigerant to charge the system.
●Charge the unit with gas refrigerant will cause the refrigerant in
the cylinder to change its composition and will lead to a drop in
performance.
Before Installing the Unit
Do not install the unit in a place where there is a possibility of
flammable gas leak.
●Leaked gas accumulated around the unit may start a fire.
Do not use the unit to preserve food, animals, plants, artifacts,
or for other special purposes.
●The unit is not designed to provide adepuate conditions to
preserve the quality of these items.
Do not use the unit in an unusual environment.
●The use of the unit in the presence of a large amount of oil,
steam, acid, alkaline solvents or special types of sprays may
lead to a remarkable drop in performance and/or malfunction
and presents a risk of electric shock, smoke, or fire.
●The presence of organic solvents, corroded gas (such as
ammonia,sulfur compounds,and acid may cause gas or water
leak.)
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Caution
Use a vacuum pump with a reverse-flow check valve.
●If other types of valves are used, the vacuum pump oil will flow
back into the refrigerant cycle and cause the refrigerator oil to
deteriorate.
Do not use the following tools that have been used with the
conventional refrigerants. Prepare tools that are for exclusive use
with R32
(Gauge manifold, charging hose, gas leak detector, reverse-
flow check valve, refrigerant charge base,vacuum gauge, and
refrigerant recovery equipment.)
●If refrigerant and/or refrigerant oil left on these tools are mixed
in with R32 , or if water is mixed with R32, it will cause the
refrigerant to deteriorate.
●Since R32 does not contain chlorine, gas-leak detectors for
conventional refrigerators will not work.
Caution
Do not use a charging cylinder.
●The use of charging cylinder will change the composition of
the refrigerant and lead to power loss.
Exercise special care when handling the tools.
●An introduction of foreign objects such as dust, dirt or water
into the refrigerant cycle will cause the refrigerating machine oil
to deteriorate.
Only use R32 refrigerant.
●The use of refrigerants containing chlorine(i.e. R22) will cause
the refrigerant to deteriorate.
Caution
When installing the unit in a hospital, take necessary measures
against noise.
●High-frequency medical equipment may interfere with
the normal operation of the air conditioning unit or the air
conditioning unit may interfere with the normal operation of the
medical equipment.
Do not place the unit on or over things that may not get wet.
●When humidity level exceeds 80% or when the drainage
system is clogged, indoor units may drip water.
●Installation of a centralized drainage system for the outdoor
unit may also need to be considered to prevent water drips from
the outdoor units.