Securing Installation And Service Space; Split Flow Duct End Connection - Fresh Air Intake; Outdoor Air Inlet; Combining Indoor Units With Outdoor Units - Mitsubishi Electric City Multi PLFY-P-NLMU-E Manuel D'installation

3.1. Securing installation and service space

[Fig. 3.1.1] (P.2)
• Select a blowout direction suited for room shape, installation site and so on.
• Piping, wiring and maintenance are all done on the bottom and the side. So,
secure the space given above for such work. Also, taking into consideration
serviceability and safety in hanging, secure as large space as possible.
Model name
A 1080 [42-17/32]
B
C
D
E
3.2. Split flow duct end connection - fresh
air intake
[Fig. 3.2.1] (P.2)
• Knockouts are provided at each position as shown in the figure. Use them for
your purposes when installing the unit.
Split flow duct end connection
Split flow duct end connection (435 × 110 knock out on both sides)
6 [1/4] - φ 2.9 [1/8] mounting hole

4. Fixing hanging bolts

4.1. Fixing hanging bolts
(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.
• 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.
[Fig. 4.1.1] (P.2)
Center of gravity
Center of gravity and Product Weight
Model
W L H
name
PLFY-P06 574 824 172
NLMU-E [22-5/8] [32-15/32] [6-25/32]
PLFY-P08 574 824 172
NLMU-E [22-5/8] [32-15/32] [6-25/32]
PLFY-P12 574 824 172
NLMU-E [22-5/8] [32-15/32] [6-25/32]
PLFY-P15 574 824 172
NLMU-E [22-5/8] [32-15/32] [6-25/32]
PLFY-P18 574 994 172
NLMU-E [22-5/8] [32-5/32] [6-25/32]

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.
When lifting with a lifting machine, in order to protect against damage,
reverse the unit body as is packed with the packing cap and lift it.
8
(mm) [in]
06-15 18
1250 [49-7/32]
More than 1000 [39-3/8]
More than 500 [19-11/16]
Lap: 20 [13/16]
More than 350 [13-25/32]
(mm) [in] (kg) [lb]
Unit
X Y Z
Weight Weight
287 370 160 23
[11-5/16] [14-19/32] [6-5/16] [51]
287 370 160 23
[11-5/16] [14-19/32] [6-5/16] [51]
287 370 160 24
[11-5/16] [14-19/32] [6-5/16] [53]
287 370 160 24
[11-5/16] [14-19/32] [6-5/16] [53]
287 445 160 27
[11-5/16] [17-17/32] [6-5/16] [60]
Note:
• Affixed on the back surface of each split flow duct end connection is
insulating material. Use a cutter knife to cut the insulating material
along the end connection.

3.3. Outdoor air inlet

[Fig. 3.3.1] (P.2)
Fresh air intake
Fresh air intake
240 [9-15/32] × 45 [1-25/32] knock out hole
4 [3/16] - φ 2.9 [1/8] mounting hole
Cut
Notes:
A Make 4 cuts on the outdoor air inlet. When connecting a round flexible
duct, mount an optional outdoor air intake duct flange PAC-KH 11OF
(φ150).
B The amount of suction air coming through the outdoor air inlet can be
adjusted by making two cuts on the outdoor air inlet as shown in the
figure above.
3.4. Combining indoor units with outdoor
units
For combining indoor units with outdoor units, refer to the outdoor unit installation
manual.

4.2. Ceiling hole and hanging bolt positions

• Use the gauge supplied with the panel to fix hanging bolts so that the unit
body and ceiling hole are positioned in place as shown in the figure below.
For how to use the gauge, refer to the instruction manual supplied with the
panel.
Notes:
• The gauge may expand or shrink with changes in the temperature and
humidity. First be sure to check the product dimensions, and then use
the gauge.
• The ceiling hole is adjustable as shown in the figure below. Align the
centers of both ceiling hole and unit body so that the unit body is not
biased to the ceiling hole and that the gaps between the ceiling hole
edges and the unit body's external dimensions come to be identical.
• Use M10 hanging bolts (for all bolts). (field supply)
• Each hanging bolt must extrude Cmm from the ceiling. It is possible to slide
the unit body 10 mm [13/32 in] max. within part of the heights of the unit body
and decorative panel in order to make fine installation adjustments to the fin-
ished ceiling surface. Sliding the unit body and incorporating a high-perfor-
mance filter requires the dimensions given in the figure below. To this, attach
nuts which will fix a hanging bracket as shown in the figure.
[Fig. 4.2.1] (P.3)
Panel
Nut
Washer (supplied with the unit body)
6.5
Hanging bolt φ10 (M10 screw)
[15]
Ceiling hole dimensions
6.5
Hanging bolt
[15]
Hanging bracket
6.5
[15] Model name
6.5
[15] A
7.5 B
[17] C
D
[Fig. 5.1.1] (P.3)
Drain pipe side
Unit body
Packing cap
Lifting machine
Hanging bolt pitch
Finished ceiling surface
06 – 15 18
1040 [40-31/32] 1210 [47-21/32]
824 [32-15/32] 994 [39-5/32]
157 – 167 [6-3/16~6-19/32]
More than 350 [13-25/32]