Installation Template (Top Of The Package); Washers (With Insulation); Washers (Without Insulation); Insulation - Mitsubishi Electric Mr.Slim PLA-A-EA7 Installation Manual

3. Installing the indoor unit
B
A
E
3-1/2 3-15/16 3-15/16 3-1/2
70°
F
13-3/4
I

Fig. 3-4

A
C
B
1
F G
D E
D Ceiling
E Rafter
F Beam
G Roof beam
Fig. 3-5
A
B
A
C
D
E
F
C
G
B
Fig. 3-6
A
C
B
Fig. 3-8
4
C
P
F
A
O
D
A
J K
L
120°
M
N
G
H
A Main unit
B Grille
C Pillar
2
J
H
I
H Use inserts rated at 100-150 kg,
221-331 lbs each (procure locally)
I Suspension bolts M10 (3/8")
(procure locally)
J Steel reinforcing rod
A Suspension bolt
B Ceiling
C Nut
D Washer (with insulation)
E Mounting plate
F Washer (without insulation)
G Check using the Installation gauge
A
D
B
C
A Main unit
B Ceiling
C Gauge
D Ceiling opening dimensions
Fig. 3-7
A Main unit
B Ceiling
C Installation template
(top of the package)
3.4. Branch duct hole and fresh air intake hole (Fig. 3-4)
At the time of installation, use the duct holes (cut out) located at the positions shown
in Fig. 3-4, as and when required.
• A fresh air intake hole for the optional multi function casement can also be made.
Note:
• The figure marked with * in the drawing represent the dimensions of the main
unit excluding those of the optional multi function casement.
• When installing the optional multi function casement, add 135 mm, 5-5/16
inch to the dimensions marked on the figure.
• When installing the branch ducts, be sure to insulate adequately. Otherwise
condensation and dripping may occur.
• When installing the fresh air intake hole, be sure to remove the insulator P
that is pasted on the indoor unit.
• When external air is input directly through the main unit, intake-air volume
should be 5% or less of indoor unit air volume.
• To input the external air, the duct fan and dust collecting filter to prevent
drawing in dust and other particles are necessary.
For details, see "Fresh air intake volume & static pressure characteristics"
in the P series DATA BOOK.
• When external air is input into the main unit, the operation noise can be larger.
A Branch duct hole
B Main unit
C Fresh air intake hole
D Drain pipe
E Refrigerant pipe
F Branch duct hole diagram
(view from either side)
G 14-4×10 tapping screws
(inch)
H ø150 mm, ø5-7/8 inch cut out hole
3.5. Suspension structure (Give site of suspension
strong structure) (Fig. 3-5)
• The ceiling work differs according to the construction of the building. Building con-
structors and interior decorators should be consulted for details.
(1) Extent of ceiling removal: The ceiling must be kept completely horizontal and the
ceiling foundation (framework: wooden slats and slat holders) must be reinforced
in order to protect the ceiling from vibration.
(2) Cut and remove the ceiling foundation.
(3) Reinforce the ends of the ceiling foundation where it has been cut and add ceiling
foundation for securing the ends of the ceiling board.
(4) When installing the indoor unit on a slanted ceiling, attach a pillar between the
ceiling and the grille and set so that the unit is installed horizontally.
Wooden structures
1
• Use tie beams (single storied houses) or second floor beams (2 story houses) as
reinforcing members.
• Wooden beams for suspending air conditioners must be sturdy and their sides must
be at least 6 cm, ø2-3/8 inch long if the beams are separated by not more than 90
cm, ø35-7/16 inch and their sides must be at least 9 cm, ø3-9/16 inch long if the
beams are separated by as much as 180 cm, 70-7/8 inch. The size of the suspen-
sion bolts should be ø10 (3/8"). (The bolts do not come with the unit.)
Ferro-concrete structures
2
Secure the suspension bolts using the method shown, or use steel or wooden hang-
ers, etc. to install the suspension bolts.
3.6. Unit suspension procedures (Fig. 3-6)
(inch)
Suspend the main unit as shown in the diagram.
Figures given in parentheses represent the dimensions in case of installing optional
multi function casement.
1. In advance, set the parts onto the suspension bolts in the order of the washers
(with insulation), washers (without insulation) and nuts (double).
• Fit the washer with cushion so that the insulation faces downward.
• In case of using upper washers to suspend the main unit, the lower washers (with
insulation) and nuts (double) are to be set later.
2. Lift the unit to the proper height of the suspension bolts to insert the mounting
plate between washers and then fasten it securely.
3. When the main unit cannot be aligned against the mounting hole on the ceiling, it
is adjustable owing to a slot provided on the mounting plate.
• Make sure that A is performed within 17-22 mm, 11/16 to 3/4 inch. Damage could
result by failing to adhere to this range. (Fig. 3-7)

Caution:

Use the top half of the box as a protective cover to prevent dust or debris from
getting inside the unit prior to installation of the decorative cover or when ap-
plying ceiling materials.
3.7. Confirming the position of main unit and
tightening the suspension bolts (Fig. 3-8)
• Using the gauge attached to the grille, ensure that the bottom of the main unit is
properly aligned with the opening of the ceiling. Be sure to confirm this, otherwise
condensation may form and drip due to air leakage, etc.
• Confirm that the main unit is horizontally levelled, using a level or a vinyl tube filled
with water.
• After checking the position of the main unit, tighten the nuts of the suspension bolts
securely to fasten the main unit.
• The installation template (top of the package) can be used as a protective sheet
to prevent dust from entering the main unit when the grilles are left unattached for
a while or when the ceiling materials are to be lined after installation of the unit is
finished.
* As for the details of fitting, refer to the instructions given on the Installation template.
(top of the package)
I ø175 mm, ø6-7/8 inch burring hole pitch
J Fresh air intake hole diagram
K 3-4×10 tapping screws
L ø125 mm, ø4-15/16 inch burring hole pitch
M ø100 mm, ø3-15/16 inch cut out hole
N Ceiling
Detailed figure of removing the insulator
O

Insulation

P