Install The Indoor Unit On A Ceiling Strong Enough To Sustain Its Weight; Securing Installation And Service Space; Combining Indoor Units With Outdoor Units; Fixing Hanging Bolts - Mitsubishi Electric CITY MULTI PEFY-P-NMLU-E Manuel D'installation

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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
space
Select the optimum direction of supply airflow according to the configuration
of the room and the installation position.
As the piping and wiring are connected at the bottom and side surfaces, and
the maintenance is made at the same surfaces, allow a proper space prop-
erly. For the efficient suspension work and safety, provide a space as much
as possible.

4. Fixing hanging bolts

4.1. Fixing hanging bolts
[Fig. 4.1.1] (P.2)
Center of gravity
(Give site of suspension strong structure.)
Hanging structure
Ceiling: The ceiling structure varies from building to one another. For detailed
information, consult your construction company.
Center of gravity and Product Weight
Model name
W
PEFY-P06NMLU-E
459 [18-3/32]
PEFY-P08NMLU-E
459 [18-3/32]
PEFY-P12NMLU-E
459 [18-3/32]

5. Changing Bottom Inlet Specifications

1. Remove filter
(6 screws).
2. Remove the bottom plate
(6 screws) and bend the slit portion inwards at a
right angle.
[Fig. 5.0.1] (P.2)
Filter
Caution:
When bending the bottom plate, be sure to protect yourself from its edges.

6. Installing the unit

6.1. 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.
Install the indoor unit before ceiling joist construction.
[Fig. 6.1.1] (P.2)
Unit body
Lifting machine
[Fig. 6.1.2] (P.2)
Nuts (field supply)
Washers (field supply)
M10 hanging bolt (field supply)

7. Refrigerant pipe and drain pipe specifications

To avoid dew drops, provide sufficient antisweating and insulating work to the
refrigerant and drain pipes.
When using commercially available refrigerant pipes, be sure to wind commer-
cially available insulating material (with a heat-resisting temperature of more than
100 °C [212 °F] and thickness given below) onto both liquid and gas pipes.
Be also sure to wind commercially available insulating material (with a form poly-
ethylene's specific gravity of 0.03 and thickness given below) onto all pipes which
pass through rooms.
8
and
service
L
H
664 [26-5/32]
115 [4-17/32]
664 [26-5/32]
115 [4-17/32]
664 [26-5/32]
115 [4-17/32]
Bottom plate
[Fig. 3.2.1] (P.2)
Access door
Air inlet
Ceiling surface
A
500 [19-22/32] or more
C
20 [13/16] or more
*
If the optional long-life filter is installed, the dimensions of the air condi-
tioner increase.
Rear inlet:Depth increases by 30 mm [1-3/16 in] (*1)
Bottom inlet:Height increases by 30 mm [1-3/16 in] (*2)
3.3. Combining indoor units with outdoor
units
For combining indoor units with outdoor units, refer to the outdoor unit installation
manual.
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 sup-
ply).
A Reinforcing the ceiling with additional members (edge beam, etc.) must be
required to keep the ceiling at level and to prevent the ceiling from vibrations.
B Cut and remove the ceiling members.
C Reinforce the ceiling members, and add other members for fixing the ceiling
boards.
X
Y
230 [9-1/16]
402 [15-27/32]
230 [9-1/16]
402 [15-27/32]
230 [9-1/16]
402 [15-27/32]
3. Fit the bottom plate
to the rear of the main body.
4. Fit filter
to the underside of the main body (6 screws).
[Fig. 5.0.2] (P.2)
Filter
Bottom plate
6.2. Confirming the unit's position and fix-
ing hanging bolts
Use the gage supplied with the panel to confirm that the unit body and
hanging bolts are positioned in place. If they are not positioned in
place, it may result in dew drops due to wind leak. Be sure to check the
positional relationship.
Use a level to check that the surface indicated by
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.
[Fig. 6.2.1] (P.2)
Indoor unit's bottom surface
Caution:
Be sure to install the unit body at level.
A Select the thickness of insulating material by pipe size.
Pipe size
6.4 mm to 25.4 mm [1/4 in to 1 in]
28.6 mm to 38.1 mm [1-1/8 in to 1-1/2 in]
B If the unit is used on the highest story of a building and under conditions of
high temperature and humidity, it is necessary to use pipe size and insulating
material's thickness more than those given in the table above.
C If there are customer's specifications, simply follow them.
Control box
Air outlet
Service space
B
100 [3-15/16] or more
D
300 [11-13/16] or more
(mm) [in]
(kg) [lb]
Z
Product Weight
95 [3-3/4]
18 [40]
95 [3-3/4]
18 [40]
95 [3-3/4]
18 [40]
is at level. Ensure
Insulating material's thickness
More than 10 mm [13/32 in]
More than 15 mm [19/32 in]

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