Securing Installation And Service Space; Combining Indoor Units With Outdoor Units; Installing The Unit; Assembling The Unit - Mitsubishi Electric CITY MULTI PFFY-P-VLRMM-E Manuel D'installation

3.1. Securing installation and service space

For PFFY-P-VLRMM-E
Model name (C)
20 · 25 660
32 · 40 780
50 · 63 1030
[Fig. 3.1.1] (P.2)
<Upward blowing type>
A Floor
C Piping space

4. Installing the unit

4.1. Assembling the unit

1 Install the unit frame in parallel with the floor securely when installing. If the
floor is not flat, be sure to use the supplied level adjusting screws to maintain
the unit body at level.
[Fig. 4.1.1] (P.2)
A Floor hole for fixing
B Level adjusting screws (supplied)
C Screw plate (supplied)
Note:
There are two level adjusting screws on both sides each, a total of four.
There are the following two methods of fixing the unit for purposes of preventing
the unit from falling down. Where fixing is necessary, screw the unit at the specified
position given below.
For fixing on the floor
[Fig. 4.1.2] (P.2)
<Viewed from bottom of the unit>
For fixing on the wall
[Fig. 4.1.3] (P.2)
<Viewed from front of the unit>
Model name (E)
20 · 25 1050
32 · 40 1170
50 · 63 1410
Note:
When fixing on the wall, fix the unit with the electrical parts removed from
the unit.

5. Refrigerant pipe and drain pipe specifications

To avoid dew drops, provide sufficient antisweating and insulating work to the re-
frigerant 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 and thickness given below) onto both liquid and gas pipes.
Be also sure to wind commercially available insulating material (with a form
polyethylene's specific gravity of 0.03 and thickness given below) onto all pipes
which pass through rooms.
1 Select the thickness of insulating material by pipe size.
Pipe size
6.4 mm to 25.4 mm
28.6 mm to 38.1 mm
2 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.
3 If there are customer's specifications, simply follow them.
(mm)
(D)
More than 240
More than 240
More than 240
B Ceiling
D Electrical part service space
(F)
640
760
1000
Insulating material's thickness
More than 10 mm
More than 15 mm
3.2. Combining indoor units with outdoor
units
For combining indoor units with outdoor units, refer to the outdoor unit installation
manual.

4.2. Center of gravity and product weight

[Fig. 4.2.1] (P.2)
A Floor hole for fixing
For PFFY-P-VLRMM-E
Model name W
PFFY-P20VLRMM-E 640 100
PFFY-P25VLRMM-E
640 100
PFFY-P32VLRMM-E 760 100
PFFY-P40VLRMM-E 760 100
PFFY-P50VLRMM-E 1000 100
PFFY-P63VLRMM-E 1000 100

5.1. Refrigerant pipe and drain pipe size

A Refrigerant pipe sizes
Model name Liquid pipe
ø 6.35
P20/25/32/40/50
ø 9.52
P63
[Fig. 5.1.1] (P.3)
A Refrigerant pipe brazing (for gas): LP
B Refrigerant pipe brazing (for liquid): HP
C Main drain pan
E Hose (accessory) (External diameter ø 27 (end ø 20))
F Air filter
L X Z Product Weight (kg)
17 335 18.5
17 335 18.5
17 335 20
17 335 21
17 335 25
17 335 27
Gas pipe
ø 12.7
ø 15.88
D Sub drain pan
G Electrical part box
7