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-VLMD-E Série 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 below for such work. Also, taking into consideration
serviceability and safety in hanging, secure as large space as possible.
Model name
20-40
A 1080
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.
A Split flow duct end connection
B Split flow duct end connection (435 mm × 110 mm knock out on both sides)
C Split flow duct end connection (754 mm × 110 mm knock out on both sides)
D Split flow duct end connection (ø200 knock out on both sides)
E 10-ø2.9 mounting hole
F 6-ø2.9 mounting hole
G 4-ø2.9 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 supply).
1 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.
2 Cut and remove the ceiling members.
3 Reinforce the ceiling members, and add other members for fixing the ceiling
boards.
[Fig. 4.1.1] (P.2)
A Center of gravity
Center of gravity and Product Weight
W L
Model name
(mm) (mm) (mm)
574 824 172
PLFY-P20VLMD-E
PLFY-P25VLMD-E 574 824 172
PLFY-P32VLMD-E 574 824 172
PLFY-P40VLMD-E 574 824 172
PLFY-P50VLMD-E 574 994 172
PLFY-P63VLMD-E 574 994 172
PLFY-P80VLMD-E 574 1494 172
PLFY-P100VLMD-E 574 1494 172
PLFY-P125VLMD-E 574 1756 203

5. Installing the unit

5.1. Hanging the unit body

s s s s s Bring the indoor unit to an installation site as it is packed.
s s s s s To hang the indoor unit, use a lifting machine to lift and pass through the
hanging bolts.
s s s s s 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
(Unit: mm)
50 · 63 80 · 100 125
1250 1750 2010
More than 1000
More than 500
Lap: 20
More than 350
Unit Panel
H X Y Z
Weight Weight
(mm) (mm) (mm)
(kg)
287 370 160 23
287 370 160 23
287 370 160 24
287 370 160 24
287 445 160 27
287 445 160 28
287 655 160 44 12.5
287 655 160 47 12.5
287 758 181 56
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)
A Fresh air intake
B Fresh air intake
240 mm × 45 mm knock out hole
C Fresh air intake
ø150 knock out hole
D 4-ø2.9 mounting hole
E Cut
Notes:
1 1 1 1 1 Make 4 cuts on the outdoor air inlet. When connecting a round flexible
duct, mount an optional outdoor air intake duct flange PAC-KH 110F (ø150).
2 2 2 2 2 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
[Fig. 3.3.1].
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 [Fig. 4.2.1]. 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 [Fig. 4.2.1]. 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 C mm from the ceiling. It is possible to slide
the unit body 10 mm max. within part of the heights of the unit body and deco-
rative panel in order to make fine installation adjustments to the finished ceil-
ing surface. Sliding the unit body and incorporating a high-performance filter
requires the dimensions given in [Fig. 4.2.1]. To this, attach nuts which will fix
a hanging bracket as shown in [Fig. 4.2.1].
[Fig. 4.2.1] (P.3)
A Nut
(kg)
B Washer (supplied with the unit body)
6.5
C Hanging bolt ø10 (M10 screw)
6.5
D Ceiling hole dimensions
6.5
F Hanging bolt
6.5
H Hanging bracket
7.5
7.5
Model name
A
B
13
C
D
[Fig. 5.1.1] (P.3)
A Drain pipe side
B Unit body
C Packing cap
D Lifting machine
E Hanging bolt pitch
G Finished ceiling surface
20 – 40 50 · 63 80 · 100
1040 1210 1710
824 994 1494
157 – 167 155 – 165
More than 350
(Unit: mm)
125
1970
1756