Before Getting Installed; Before Getting Installed (Moved) - Electrical Work; Before Starting The Test Run; Indoor Unit Accessories - Mitsubishi Electric CITY MULTI PEFY-WP25VMS1-E Installation Manual

• The indoor models should be installed the ceiling over than 2.5 m from
floor.
1.3. Before getting installed (moved) - elec-
trical 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 an leak circuit breaker, as required.
- If an 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.
- If the damage is left uncorrected, the unit may fall and cause personal in-
jury 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.
- 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.

2. Indoor unit accessories

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

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 water 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.)
• If the unit is run for long hours when the air above the ceiling is at high tem-
perature/high humidity (due point above 26 °C), due condensation may be
produced in the indoor unit. When operating the units in this condition, add
insulation material (10-20 mm) to the entire surface of the indoor unit to avoid
due condensation.
3.1. Install the indoor unit on a ceiling
strong enough to sustain its weight
Secure enough access space to allow for the maintenance, inspection, and re-
placement of the motor, fan, drain pump, heat exchanger, and electric box in one
of the following ways.
Select an installation site for the indoor unit so that its maintenance access
space will not be obstructed by beams or other objects.
- 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 can-
not 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 section [9] "Instructions for debris removal opera-
tion" under chapter IX 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.
Qty
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(1) When a space of 300 mm or more is available below the unit between the
unit and the ceiling (Fig. 3-1-1)
• Create access door 1 and 2 (450 x 450 mm each) as shown in Fig. 3-1-2.
(Access door 2 is not required if enough space is available below the unit for
a maintenance worker to work in.)
(2) When a space of less than 300 mm is available below the unit between the
unit and the ceiling (At least 20 mm of space should be left below the unit as
shown in Fig. 3-1-3.)
• Create access door 1 diagonally below the electric box and access door 3
below the unit as shown in Fig. 3-1-4.
or
• Create access door 4 below the electric box and the unit as shown in
Fig. 3-1-5.
[Fig. 3-1-1] (P.2)
[Fig. 3-1-2] (Viewed from the direction of the arrow A) (P.2)
[Fig. 3-1-3] (P.2)
[Fig. 3-1-4] (Viewed from the direction of the arrow B) (P.2)
[Fig. 3-1-5] (Viewed from the direction of the arrow B) (P.2)
A Electric box
C Ceiling beam
E Access door 1 (450 mm x 450 mm) F Maintenance access space
G Supply air
I Bottom of indoor unit
K Access door 4
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.
B Ceiling
D Access door 2 (450 mm x 450 mm)
H Intake air
J Access door 3
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