Installing The Indoor Unit - Mitsubishi Electric PLFY-P-VAM-E Installation Manual

2. Installing the indoor unit

860–910
20–45
159
197
G
F
E
Fig. 2-2
C
B
A
E
D
F
90 100
J
Fig. 2-3
A
C
B
1
F G
D E
D Ceiling
E Rafter
F Beam
G Roof beam
Fig. 2-4
D
950
C
20–45
B
810
159
A
840
F
E
Min. 500
H
K
L
M
120°
A
N
O
G
100 90
H
I
350
A Unit
B Grille
C Pillar
2
J
H
I
H Use inserts rated at 100-150 kg
each (procure locally)
I Suspension bolts M10 (3/8") (procure
locally)
J Steel reinforcing rod
2.2. Ceiling openings and suspension bolt installation
locations (Fig. 2-2)
• Using the installation template (top of the package) and the gauge (supplied as an
accessory with the grille), make an opening in the ceiling so that the main unit can
be installed as shown in the diagram. (The method for using the template and the
gauge are shown.)
* Before using, check the dimensions of template and gauge, because they
change due to fluctuations of temperature and humidity.
* The dimensions of ceiling opening can be regulated within the range shown in
following diagram; so center the main unit against the opening of ceiling, en-
suring that the respective opposite sides on all sides of the clearance between
them becomes identical.
• Use M10 (3/8") suspension bolts.
* Suspension bolts are to be procured at the field.
• Install securely, ensuring that there is no clearance between the ceiling panel &
grille, and between the main unit & grille.
A Outer side of main unit
B Bolt pitch
C Ceiling opening
D Outer side of Grille
E Grille
F Ceiling
G Multi function casement (option)
H Entire periphery
* Note that the space between ceiling panel of the unit and ceiling slab and etc must be 10 to
15 mm.
Models C
P32-P80 241
P100, P125 281
2.3. Branch duct hole and fresh air intake hole (Fig. 2-3)
At the time of installation, use the duct holes (cut out) located at the positions shown
in following diagram, 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 to the di-
mensions marked on the figure.
When installing the branch ducts, be sure to insulate adequately. Otherwise
condensation and dripping may occur.
A Branch duct hole
B Indoor unit
C Fresh air intake hole
D Drain pipe
E Refrigerant pipe
F Branch duct hole diagram (view from
either side)
G Cut out hole
H 14-ø2.8 burring hole
2.4. Suspension structure (Give site of suspension
strong structure) (Fig. 2-4)
• 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 slanting ceiling, attach a pillar between the
ceiling and the grille and set so that the unit is installed horizontally.
1 Wooden structures
• Use tie beams (single storied houses) or second floor beams (two story houses) as
reinforcing members.
• Wooden beams for suspending air conditioners must be sturdy and their sides
must be at least 6 cm long if the beams are separated by not more than 90 cm and
their sides must be at least 9 cm long if the beams are separated by as much as
180 cm. The size of the suspension bolts should be ø10 (3/8"). (The bolts do not
come with the unit.)
2 Ferro-concrete structures
Secure the suspension bolts using the method shown, or use steel or wooden hang-
ers, etc. to install the suspension bolts.
(mm)
D
258
298
I ø150 cut out hole
J ø175 burring hole pitch
K Fresh air intake hole diagram
L 3-ø2.8 burring hole
M ø125 burring hole pitch
N ø100 cut out hole
O Ceiling
3