Combining Indoor Units With Outdoor Units; Installing The Unit; Assembling The Unit; Blowout Changing Procedure - Mitsubishi Electric CITY MULTI PFFY-P25VLEM-A Manuel D'installation

For PFFY-P-VLRM-A
Model name (C)
25 660
32 · 40 780
50 · 63 1030
[Fig. 3.1.2] (P.2)
<Upward blowing type>
<Forward blowing type>
A Floor
C Piping space

4. Installing the unit

4.1. Assembling the unit

How to disassemble the unit
1 Loosen two screws fixing the front panel.
[Fig. 4.1.1] (P.2)
A Front panel
2 Hold the bottom of the front panel with your hands, and gently lift it. The front
panel should fall down forward.
[Fig. 4.1.2] (P.2)
3 Open the control panel cover, loosen the upper securing screw.
[Fig. 4.1.3] (P.2)
B Control panel cover
C Side casing
4 Pull up the side casing.
[Fig. 4.1.4] (P.2)
5 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. 4.1.5] (P.2)
D Floor hole for fixing
E Level adjusting screws (supplied)
F 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. 4.1.6] (P.2)
<Viewed from bottom of the unit>
For fixing on the wall
[Fig. 4.1.7] (P.2)
<Viewed from front of 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.

6. Connecting refrigerant pipes and drain pipes

6.1. Refrigerant piping work

This piping work must be done in accordance with the installation manual for the
outdoor unit.
6
(mm)
(D)
More than 240
More than 240
More than 240
B Ceiling
D Electrical part service space
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.
Model name (E)
25 1050
32 · 40 1170
50 · 63 1410
Note:
When fixing on the wall, fix the unit with the electrical parts removed from
the side.

4.2. Blowout changing procedure

(For PFFY-P-VLRM Series only)
To change the blowout from upward to forward in the case of the flush type units
PFFY-P-VLRM Series, follow the procedure below.
6 Remove the screws, lift to remove the blowout hole in direction 1, turn the
blowout hole 180° 2, and set the hole forward 3.
[Fig. 4.2.1] (P.2)
7 Set the blowout hole just as it was removed, and tighten the screws.
[Fig. 4.2.2] (P.2)
Notes:
• When handling the blowout hole, be careful that the insulating material
lined inside is not peeled off.
• Be careful not to get your hand injured by sheet metal edges.
• When connecting a duct to the blowout hole, be sure to insert the duct to
the hilt of the blowout hole, and provide insulating material over the duct.
Also, seal the joints between the duct and unit body with aluminum tape.
(8)
• If you want to use the unit without connecting a duct to the blowout hole,
be sure to provide soft urethane form around the blowout hole in order to
prevent the blowout hole section from dew condensation. (9)
[Fig. 4.2.3] (P.2)
A Duct
B Tape
C Blowout hole section
D Insulating material
E Insulating material (10 mm in thickness. Be provided around the blowout hole
section.)

5.1. Refrigerant pipe and drain pipe size

Model name 25 · 32 · 40
Liquid pipe
Refrigerant
pipe Gas pipe
Drain pipe Accessory hose ø27 mm (End ø20 mm)
[Fig. 5.1.1] (P.3)
A Refrigerant pipe flare connection (for gas): LP
B Refrigerant pipe flare connection (for liquid): HP
C Drain pan
E Hose (accessory) (External diameter ø27 (end ø20))
F Air filter
• For constraints on pipe length and allowable difference of elevation, refer to
the outdoor unit manual.
• The method of pipe connection is flare connection.
(F)
640
760
1000
50 · 63
ø6.35 ø9.52
ø12.7 ø15.88
D Stainer
G Electrical part box