Mitsubishi Electric Mr.SLIM SLZ-M FA Series Installation Manual page 6

4. Installing the indoor unit
A B
20
D
en
A
C
B
1
F G
D E
D Ceiling
E Rafter
F Beam
G Roof beam
4
140
C
F
120°
G
70
E
Duct flange connection
H
I
Fig. 4-3
A Unit
B Grille
C Pillar
2
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
*B: Suspension bolt pitch (see Fig. 4-2 B for details)
Fig. 4-4
4.3. Installation of duct (in case of fresh air intake)
(mm)
(Fig. 4-3)
Caution:
Linkage of duct fan and air conditioner
ln case that a duct fan is used, be sure to make it linked with the air conditioner
when outside air is taken.
Do not run the duct fan only. It can cause dew drop.
Making a duct flange (prepared locally)
• The shape of duct flange shown left is recommended.
Installation of duct flange
• Cut out the cutout hole. Do not knock it out.
• Install a duct flange to the cutout hole of the indoor unit with three 4 × 10 tapping
J
screws which should be prepared locally.
Installation of duct (should be prepared locally)
• Prepare a duct of which inner diameter fits into the outer diameter of the duct flange.
• In case that the environment above the ceiling is high temperature and high humidity,
wrap the duct in a heat insulate to avoid causing dew drop on the wall.
Remove the drain pan insulation.
A Duct flange recommended shape
(Thickness:0.8 or more)
B 3-ø5 hole
C Detail drawing of fresh air intake
D Indoor unit
E Ceiling surface
4.4. Suspension structure (Give site of suspension
strong structure) (Fig. 4-4)
• 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
J
foundation for securing the ends of the ceiling board.
(4) When installing the unit on a slanting ceiling, interlock a pillar between the ceiling
and the grille and set so that the unit is installed horizontally.
1 Wooden structures
• Use tie beams (single-story 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
with the unit.)
2 Ferroconcrete structures
Secure the suspension bolts using the method shown, or use steel or wooden hang-
ers, etc. to install the suspension bolts.
F 3-Tapping screw hole
G ø73.4 cutout hole
H Duct flange (Prepared locally)
I 4 × 10 Tapping screw (Prepared locally)
J Insulation
). (The bolts do not come
"