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Caution
Before Installing the Unit
Do not use the unit to preserve food, animals, plants, or
artifacts, or for other special purposes.
• The unit is not designed to provide adequate conditions to
preserve the quality of these items.
Use a closed circulating water circuit (which does not
release water in the air) as a heat source.
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 in an unusual environment.
• Installing the unit in a place where a large amount of oil,
steam, or sulphurous gas is present may lead to a
remarkable drop in performance and/or damage to the unit.
Ground the unit.
• Do not connect the grounding on the unit to the grounding
terminals of gas pipes, water pipes, lightning rods, or
telephones. Improper grounding presents a risk of electric
shock.
Heat-Source Unit is only to be installed indoors (including
mechanical rooms). Make sure that the temperature
around the heat-source unit does not exceed 40˚CDB and
that it is out of direct sunlight.
• A sharp rise in the temperature inside the unit may damage
the unit.
When installing draining pipes, follow the instructions in
the manual and make sure that they properly drain water
as to prevent dew condensation.
• If not installed properly, water may leak and damage the
furnishings.
Make sure that the quality of circulating water meets the
standards set by Mitsubishi based on the Guidelines for
the Quality of Water for Refrigeration and Air Conditioning
established by the Japan Refrigeration and Air
Conditioning Industry Association.
• Using low-quality water may result in decreased
performance of the water-heat exchanger or corrosion.
Do not place the unit on or over things that should 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 heat-source unit
may also need to be considered to prevent water drips.
When installing the unit in hospitals, take necessary
measures against noise interference.
• High-frequency medical devices may interfere with the
normal operation of the air conditioning unit or vice versa.
• Water in an open circulating water circuit may become
contaminated when exposed to air and lead to a drop in
water-heat exchanger performance. It may also corrode the
exchanger.
Use breakers and fuses with proper current capacity. Do
not use large-capacity fuses, steel wire, or copper wire,
for they may damage the unit or cause fire.
For electrical wiring, use standard wires with proper
current capacity to prevent electric leak, overheating, and
fire.
Caution
Before Installing (Relocating) the Unit or Performing Electrical Work
Make sure the wires are not subject to tension.
• If the wires are too taut, they may generate heat and cause
fire.
Install a leak breaker at the power source to avoid the risk
of electric shock.
Do not spray water on air conditioners. Spraying the unit
presents a risk of electric shock.
Periodically check the platform on which the unit is placed
for damage to prevent the unit from toppling over.
