Table of Contents
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.
•
Charging 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 adequate
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.
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 R410A refrigerant.
•
The use of refrigerants containing chlorine (i.e. R22)
will cause the refrigerant to deteriorate.
Warning
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.
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