Mount Filter Before Hanging Up The Indoor Unit To The Position; Install The Indoor Unit On A Ceiling Strong Enough To Sustain Its Weight; Securing Installation And Service Space; Combining Indoor Units With Outdoor Units - Mitsubishi Electric CITY MULTI PEFY-P20-VMR-E-L Manuel D'installation

• When special chemical product may scatter around such as site chemical plants
and hospitals, full investigation is required before installing unit. (The plastic
components may be damaged depending on the chemical product applied.)
• If the unit is run for long hours when the air above the ceiling is at high tem-
perature/high humidity (due point above 26 °C), due condensation may be
produced in the indoor unit. When operating the units in this condition, add
insulation material (10-20 mm) to the entire surface of the indoor unit to avoid
due condensation.
3.1. Mount filter before hanging up the In-
door unit to the position
1. Loose the screws fixing the filter rails at the bottom and the top of the Indoor
unit.
2. Slide the filter rail from A to B position.
3. Slide the filter into the filter rail.
4. Tighten the screws again.
[Fig. 3.1.1] (P.2)
<A> Bottom filter rail
<B> Top filter rail
A Indoor unit body
C Filter rail
E Before mounting filter

4. Fixing hanging bolts

4.1. Fixing hanging bolts
[Fig. 4.1.1] (P.2)
A Center of gravity
Hanging structure
• Ceiling: The ceiling structure varies from building to one another. For detailed
information, consult your construction company.

5. Changing Bottom Inlet Specifications

1. Remove filter A.
2. Remove the bottom plate B.
[Fig. 5.0.1] (P.2)
A 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

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.
[Fig. 6.1.1] (P.2)
A Unit body
B Lifting machine
[Fig. 6.1.2] (P.2)
C Nuts (field supply)
D Washers (accessory)
E M10 hanging bolt (field supply)
8
B Screw
D Filter slide-in direction
F After mounting filter
B Bottom plate
3.2. 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.

3.3. Securing installation and service 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 properly.
For the efficient suspension work and safety, provide a space as much as
possible.
[Fig. 3.3.1] (P.2)
A Access door
C Air inlet
E Service space
3.4. 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 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.
3. Fit the bottom plate B to the rear of the main body.
4. Fit filter A to the underside of the main body.
[Fig. 5.0.2] (P.2)
A Filter
B Bottom plate
6.2. Confirming the unit's position and fix-
ing hanging bolts
s s s s s Use a level to check that the surface indicated by A A A A A is at level. Ensure
that the hanging bolt nuts are tightened to fix the hanging bolts.
s s s s s To ensure that drain is discharged, be sure to hang the unit at level using
a level.
[Fig. 6.2.1] (P.2)
A Indoor unit's bottom surface
Caution:
Be sure to install the unit body at level.
B Electrical parts box
D Air outlet
F 300 or more