Before Starting The Test Run; Indoor Unit Accessories; Selecting An Installation Site; Combining Indoor Units With Outdoor Units - Mitsubishi Electric MVZ-A12AA7 Installation Manual

• Use only a circuit breaker and fuse of the specified
capacity.
− A fuse or circuit breaker of a larger capacity or a steel or
copper wire may result in a general unit failure or fire.
• Do not wash the air conditioner units.
− Washing them may cause an electric shock.
• Be careful that the installation base is not damaged by
long use.
− If the damage is left uncorrected, the unit may fall and cause
personal injury or property damage.
• Install the drain piping according to this Installation
Manual to ensure proper drainage. Wrap thermal
insulation around the pipes to prevent condensation.
−
Improper drain piping may cause water leakage and damage
to furniture and other possessions.
• Be very careful about product transportation.
− If the product weighs more than 20 kg [44 lb], then more than
one person should carry the product.
− Some products use PP bands for packaging. Do not use any
PP bands for a means of transportation; it is dangerous.
− Do not touch the heat exchanger fins. Doing so may cut your
fingers.
• Safely dispose of the packing materials.
− Packing materials, such as nails and other metal or wooden
parts, may cause stabs or other injuries.
− Tear apart and throw away plastic packaging bags so
that children will not play with them. If children play with a
plastic bag which was not torn apart, they face the risk of
suffocation.

3.5. Before starting the test run

Caution:
• Turn on the power at least 12 hours before starting
operation.
− Starting operation immediately after turning on the main
power switch can result in severe damage to internal parts.
Keep the power switch turned on during the operational
season.
• Do not touch the switches with wet fingers.
− Touching a switch with wet fingers can cause electric
shock.
• Do not touch the refrigerant pipes during and
immediately after operation.
− During and immediately after operation, the refrigerant
pipes may be hot or may be cold, depending on the
condition of the refrigerant flowing through the refrigerant
piping, compressor, and other refrigerant cycle parts.
Your hands may suffer burns or frostbite if you touch the
refrigerant pipes.
• Do not operate the air conditioner with the panels and
guards removed.
− Rotating, hot, or high-voltage parts can cause injuries.
• Do not turn off the power immediately after stopping
operation.
− Always wait at least five minutes before turning off the
power. Otherwise, water leakage and trouble may occur.
6

4. Indoor unit accessories

Part No.
1 Plastic tie
2 Plastic tube
3 Installation Manual
4 Operation Manual
5 Drain pan seal

5. Selecting an installation site

• Avoid locations exposed to outside air.
Select a location free of obstructions to the airflow in and out of
•
the unit.
• Avoid locations exposed to steam or vapor
• Avoid locations where combustible gas may leak, settle or be
generated.
• Avoid installation near machines emitting high-frequency waves
(high frequency welders, etc.).
• Avoid locations where the airflow is directed at a fire alarm
sensor. (Hot air could trigger the alarm during operation)
• Avoid places where acidic solutions are frequently used.
• Avoid places where sulphur-based or other sprays are
commonly used.
When the air handler is installed in the horizontal position
•
please install a drain pan under entire cabinet.
• Install sufficient thermal insulation to prevent condensation from
forming on the outlet and inlet ducts.
6. Combining indoor units with outdoor
units
For combining indoor units with outdoor units, refer to the outdoor
unit's installation manual.
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