Indoor Unit Accessories; Selecting An Installation Site; Install The Indoor Unit On A Ceiling Strong Enough To Sustain Its Weight; Securing Installation And Service Space - Mitsubishi Electric CITY MULTI PEFY-P06NMAU-E4 Manuel D'installation

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.)
• 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.

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.

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-P06NMAU-E4
PEFY-P08NMAU-E4
PEFY-P12NMAU-E4
PEFY-P15NMAU-E4
PEFY-P18NMAU-E4
PEFY-P24NMAU-E4
PEFY-P27NMAU-E4
PEFY-P30NMAU-E4
PEFY-P36NMAU-E4
PEFY-P48NMAU-E4
PEFY-P54NMAU-E4
Qty.
4
2
8
W (mm [in]) L (mm [in])
643 [25-5/16] 754 [29-11/16]
643 [25-5/16] 754 [29-11/16]
643 [25-5/16] 754 [29-11/16]
643 [25-5/16] 954 [37-9/16]
643 [25-5/16] 954 [37-9/16]
643 [25-5/16] 1154 [45-7/16]
643 [25-5/16] 1154 [45-7/16]
643 [25-5/16] 1154 [45-7/16]
643 [25-5/16] 1454 [57-1/4]
643 [25-5/16] 1454 [57-1/4]
643 [25-5/16] 1654 [65-1/8]
Part No.
4 Installation manual
5 Operation manual
6 Washer (round)
(1) When a space of 300 mm [11-13/16 in] 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 [17-3/4 x 17-3/4 in] 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 [11-13/16 in] is available below the unit
between the unit and the ceiling (At least 20 mm [13/16 in] 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)
Electric box
A
Ceiling beam
C
Access door 2 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
D
Access door 1 (450 mm x 450 mm [17-3/4 in x 17-3/4 in])
E
Maintenance access space
F
Intake air
H
Access door 3
J
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.
* U se M10 for hanging bolts and anti-quake supporting members (field supply).
X (mm [in]) Y (mm [in])
330 [13] 300 [11-13/16]
330 [13] 300 [11-13/16]
330 [13] 300 [11-13/16]
340 [13-3/8] 375 [14-3/4]
340 [13-3/8] 375 [14-3/4]
325 [12-13/16] 525 [20-11/16]
325 [12-13/16] 525 [20-11/16]
325 [12-13/16] 525 [20-11/16]
330 [13] 675 [26-9/16]
330 [13] 675 [26-9/16]
332 [13-1/16] 725 [28-9/16]
Accessories
Ceiling
B
Supply air
G
Bottom of indoor unit
I
Access door 4
K
Z (mm [in]) Product Weight (kg [lb])
130 [5-1/8] 21 [47]
130 [5-1/8] 21 [47]
130 [5-1/8] 21 [47]
130 [5-1/8] 26 [58]
130 [5-1/8] 26 [58]
130 [5-1/8] 30 [67]
130 [5-1/8] 30 [67]
130 [5-1/8] 30 [67]
130 [5-1/8] 38 [84]
130 [5-1/8] 39 [86]
130 [5-1/8] 41 [91]
Qty.
1
1
2
9