Mitsubishi Electric CITY MULTI PQHY-P-ZLMU-A1 Manuel D'installation page 20

Pay special attention to the place of installation, such as a basement,
etc. where refrigeration gas can accumulate, since refrigerant is
heavier than the air.
This appliance is intended to be used by expert or trained users in
shops, in light industry 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 instruction concerning use of the appliance by a person responsible
for their safety.
Children should be supervised to ensure that they do not play with the
appliance.
1.2. Precautions for devices that use
R410A refrigerant
Caution:
Do not use existing refrigerant piping.
deteriorate.
burst.
Use refrigerant piping made of phosphorus deoxidized copper and
copper alloy seamless pipes and tubes. 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, oils, moisture, or any other
contaminant.
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.)
(for indoor unit)
deteriorate.
Do not use a refrigerant other than R410A.
Do not use the following tools that are used with conventional
refrigerants.
valve, refrigerant charge base, refrigerant recovery equipment)
Do not use a charging cylinder.
Be especially careful when managing the tools.
deteriorate.
Wear protective gloves when working on the unit.
1.3. Before installation
Caution:
Do not install the unit where combustible gas may leak.
Do not use the air conditioner where food, pets, plants, precision
instruments, or artwork are kept.
Do not use the air conditioner in special environments.
the air conditioner or damage its parts.
When installing the unit in a hospital, communication station, or similar
equipment, or radio communication equipment may cause the air
disturbs medical treatment or image broadcasting.
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Do not install the unit on or over things that are subject to water
damage.
work together with the heat source unit, as required.
1.4. Before installation (relocation) -
electrical work
Caution:
Ground the unit.
telephone ground lines. Improper grounding may result in electric shock.
Never connect in reverse phases.
be damaged.
Install the power cable so that tension is not applied to the cable.
Install a leak circuit breaker, as required.
Do not wash the air conditioner units.
Be careful that the installation base is not damaged by long use.
Install the drain piping to ensure proper drainage. Wrap thermal
insulation around the pipes to prevent condensation.
and other possessions.
Be very careful about transporting the product.
cannot slip sideways.
Safely dispose of the packing materials.
1.5. Before starting the test run
Caution:
Turn on the power at least 12 hours before starting operation.
power supply and voltage between each phase.
Do not touch the refrigerant pipes during and immediately after
operation.
Do not operate the air conditioner with the panels and guards removed.
Do not turn off the power immediately after stopping operation.
Do not touch the surface of the compressor during servicing.