Before Getting Installed; Before Getting Installed (Moved) - Electrical Work; Before Starting The Test Run; Indoor Unit Accessories - Mitsubishi Electric PEFY-WL06NMAU-A Installation Manual

1.2. Before getting installed

Caution:
• Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion may result.
• Do not use the air conditioner where food, pets, plants, precision
instruments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
• Do not use the air conditioner in special environments.
- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of the
air conditioner or damage its parts.
• When installing the unit in a hospital, communication station, or similar
place, provide sufficient protection against noise.
- The inverter equipment, private power generator, high-frequency medical
equipment, or radio communication equipment may cause the air conditioner
to operate erroneously, or fail to operate. On the other hand, the air conditioner
may affect such equipment by creating noise that disturbs medical treatment or
image broadcasting.
• Do not install the unit on a structure that may cause leakage.
- When the room humidity exceeds 80% or when the drain pipe is clogged,
condensation may drip from the indoor unit. Perform collective drainage work
together with the outdoor unit, as required.
• The indoor models should be installed the ceiling over than 2.5 m [9 ft]
from floor.
1.3. Before getting installed (moved) -
electrical work
Caution:
• Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning rods, or
telephone ground lines. Improper grounding may result in electric shock.
• Install the power cable so that tension is not applied to the cable.
- Tension may cause the cable to break and generate heat and cause a fire.
• Install a leak circuit breaker, as required.
- If a leak circuit breaker is not installed, electric shock may result.
Use power line cables of sufficient current carrying capacity and rating.
•
- Cables that are too small may leak, generate heat, and cause a fire.
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.

2. Indoor unit accessories

The unit is provided with the following accessories:
Part No. Accessories
1 Tie band
2 Drain hose
3 Washer (square)

3. Selecting an installation site

Select a site with sturdy fixed surface sufficiently durable against the weight of
•
unit.
• Before installing unit, the routing to carry in unit to the installation site should be
determined.
Select a site where the unit is not affected by entering air.
•
Select a site where the flow of supply and return air is not blocked.
•
• Select a site where refrigerant piping can easily be led to the outside.
• Select a site which allows the supply air to be distributed fully in room.
• Do not install unit at a site with oil splashing or steam in much quantity.
Do not install unit at a site where combustible gas may generate, flow in,
•
stagnate or leak.
• Do not install unit at a site where equipment generating high frequency waves (a
high frequency wave welder for example) is provided.
Do not install unit at a site where fire detector is located at the supply air side.
•
(Fire detector may operate erroneously due to the heated air supplied during
heating operation.)
• When special chemical product may scatter around such as site chemical plants
and hospitals, full investigation is required before installing unit. (The plastic
components may be damaged depending on the chemical product applied.)
10
- 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.
- Only one person should not carry the product if it weighs more than 20 kg [45
LBS].
- 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.
- When transporting the outdoor unit, suspend it at the specified positions on
the unit base. Also support the outdoor unit at four points so that it cannot slip
sideways.
• 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.

1.4. 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 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.
• When water has been supplied to the water pipework, purge the system of
air. The details of air purging can be found separately in the water circuit
maintenance manual.
- Details are described in "Instructions for debris removal operation" under
Troubleshooting in the Service Handbook for the HBC.
- Refer to Fig. 1.4.1 for the position of the air vent valve on the indoor unit.
[Fig. 1.4.1] (P.2)
A Air vent valve
Qty. Part No.
4 4 Installation manual
2 5 Operation manual
8 6 Washer (round)
• If the unit is run for long hours when the air above the ceiling is at high
temperature/high humidity (dew point above 26°C [79°F]), dew condensation
may be produced in the indoor unit. When operating the units in this condition,
add insulation material (10-20 mm [13/32 to 13/16 in]) to the entire surface of the
indoor unit to avoid dew condensation.
3.1. Install the indoor unit on a ceiling strong
enough to sustain its weight
Warning:
The unit must be securely installed on a structure that can sustain its weight. If
the unit is mounted on an unstable structure, it may fall down causing injuries.
Accessories Qty.
1
1
2