Selecting An Installation Site; Install The Indoor Unit On A Ceiling Strong Enough To Sustain Its Weight; Securing Installation And Service Space; Combining Indoor Units With Outdoor Units - Mitsubishi Electric CITY MULTI PEFY-P140VMA-E3 Installation Manual

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.)
• If the unit is run for long hours when the air above the ceiling is at high
temperature/ 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
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.

4. Fixing hanging bolts

4.1. Fixing hanging bolts
[Fig. 4.1.1] (P.3)
A Center of gravity
(Give site of suspension strong structure.)
Center of gravity and Product Weight
Model name
PEFY-P20VMA(L)-E3
PEFY-P25VMA(L)-E3
PEFY-P32VMA(L)-E3
PEFY-P40VMA(L)-E3
PEFY-P50VMA(L)-E3
PEFY-P63VMA(L)-E3
PEFY-P71VMA(L)-E3
PEFY-P80VMA(L)-E3
PEFY-P100VMA(L)-E3
PEFY-P125VMA(L)-E3
PEFY-P140VMA(L)-E3
The values in the parenthesis are for the PEFY-P·VMAL-E3 model.

5. Installing the unit

5.1. Hanging the unit body

Bring the indoor unit to an installation site as it is packed.
To hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
[Fig. 5.1.1] (P.3)
A Unit body
B Lifting machine
[Fig. 5.1.2] (P.3)
C Nuts (field supply)
D Washers (field supply)
E M10 hanging bolt (field supply)

3.2. Securing installation and service space

Secure enough access space to allow for the maintenance, inspection, and
replacement 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.
(1) When a space of 300 mm or more is available below the unit between the unit
and the ceiling (Fig. 3.2.1)
• Create access door 1 and 2 (450 x 450 mm each) as shown in Fig. 3.2.2.
(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. 3.2.3.)
• Create access door 1 diagonally below the electric box and access door 3
below the unit as shown in Fig. 3.2.4.
or
• Create access door 4 below the electric box and the unit as shown in Fig. 3.2.5.
[Fig. 3.2.1] (P.2)
[Fig. 3.2.2] (Viewed from the direction of the arrow A) (P.2)
[Fig. 3.2.3] (P.2)
[Fig. 3.2.4] (Viewed from the direction of the arrow B) (P.2)
[Fig. 3.2.5] (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)
G Supply air
I Bottom of indoor unit
K Access door 4

3.3. Combining indoor units with outdoor units

For combining indoor units with outdoor units, refer to the outdoor unit installation
manual.
Hanging structure
• Ceiling: The ceiling structure varies from building to one another. For detailed
information, consult your construction company.
• If necessary, reinforce the hanging bolts with anti-quake supporting members as
countermeasures against earthquakes.
* Use M10 for hanging bolts and anti-quake supporting members (field supply).
W L X
643 754 330
643 754 330
643 754 330
643 954 340
643 954 340
643 954 340
643 1154 325
643 1154 325
643 1454 330
643 1454 330
643 1654 332
5.2. Confirming the unit's position and fixing hanging
Ensure that the hanging bolt nuts are tightened to fix the hanging bolts.
To ensure that drain is discharged, be sure to hang the unit at level using
a level.
Caution:
Install the unit in horizontal position. If the side with drain port is installed
higher, water leakage may be caused.
B Ceiling
D Access door 2 (450 mm x 450 mm)
F Maintenance access space
H Intake air
J Access door 3
Y Z
300 130
300 130
300 130
375 130
375 130
375 130
525 130
525 130
675 130
675 130
725 130
bolts
Product Weight (kg)
21 (20)
21 (20)
21 (20)
25 (24)
25 (24)
27 (26)
30 (29)
30 (29)
37 (36)
38 (37)
42 (41)
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