Mitsubishi Electric City Multi PMFY-P NBMU-E Série Manuel D'installation page 4

2. Installing the indoor unit
Ceiling panel
Rafter
Beam
Roof beam
Use inserts rated at 250-350 lbs. (100-150 kg) each (procure locally)
Suspension bolts 3/8" (M10) (procure locally)
Steel reinforcing rod
C channel
Channel suspension bracket
M10 suspension bolt
Fig. 2-4
*1
*
Fig. 2-6
Suspension bolt (3/8" or M10)
Clear plastic tubing
Underside of bracket
Secure front panel here
Make these surfaces are flush with each other (0 - 1/8 in. (0 - 3 mm))
Fig. 2-7
4
Suspension bolt
Ceiling panel
Nut
Washer (with insulation)
Washer (without insulation)
Fig. 2-5
Suspension bolt (3/8" or M10)
Ceiling surface
*
Nut (3/8" or M10)
Washer (with insulation)
Washer
(Install with insulation facing down)
Measurement to upper face of bracket
in. (mm)
Wooden structures (Fig. 2-4)
1
• Use tie beams (single storied houses) or second fl oor beams (two story houses)
as reinforcing members.
• Wooden beams for suspending air conditioners must be sturdy and their sides
must be at least 2-3/8 in. (6 cm) long if the beams are separated by not more
than 35-7/16 in. (90 cm) and their sides must be at least 3-9/16 in. (9 cm) long if
the beams are separated by as much as 70-7/8 in. (180 cm). The size of the sus-
pension bolts should be 3/8" (ø10). (The bolts do not come with the unit.)
• Use channel, duct and other parts procured locally to suspend the indoor unit.
Ferro-concrete structures
2
Secure the suspension bolts using the method shown, or use steel or wooden
hangers, etc. to install the suspension bolts.
in. (mm) 2.4. Unit suspension procedures (Fig. 2-5)
Procure 3/8" bolts or M10 bolts locally.
• Adjust the length of the bolt's protrusion from the ceiling surface beforehand.
*1. When using an extra upper nut in suspending the unit, in some cases you
may have to add it later.
Check the pitch of the suspension bolt. (13-1/2 in. × 32 in. (340 mm × 811 mm)) (Fig.
2-6)
in. (mm)
1. Thread washers
1 2
pension bolt in advance.
* Do this in the following order (from the top): nut, insulated washer
er without insulation
* Position insulated washer
the fi gure.
2. Lift the unit into place, aligned properly with the suspension bolt. Pass the brack-
et between washers
the same in all four places.
* Make sure the suspension bolt extends 3/4 in. (20 mm) or more from the
surface of the ceiling. Otherwise you will not be able to install the cover
panel (sold separately).
3. If the long opening in the bracket and opening in the ceiling do not align, adjust
them until they do.
4. Check that the 4 corners are all level, using a spirit level or clear plastic tubing
with water in it.
* Make sure that any slant in the unit after installation is less than 0.5 degrees
in. (mm)
(approx. 1/4 in. (6 mm) on the long dimension of the unit).
5. Tighten all the nuts. (Fig. 2-7)
(supplied) and their nuts (procured locally) onto the sus-
, two nuts.
1
with the insulated surface pointing down, as in
2
and , which are already in place, and secure it. Do
1 2
, wash-
2