Indoor Unit Installation - Mitsubishi Electric MLP-444WU Installation Manual

2. INDOOR UNIT INSTALLATION

2-1. CEILING OPENINGS AND SUSPENSION BOLT
INSTALLATION LOCATIONS
• Install the indoor unit at least 7 ft. (2.2 m) above floor or grade level.
For appliance not accessible to the general public.
• Refrigerant pipes connection shall be accessible for maintenance purposes.
• Make an opening in the ceiling 15-1/8 × 45-11/16 in. (384 mm × 1160 mm)
in size. This functions as a check window and will be needed later during
servicing.
• If the dimensions are not accurate, when the grille is installed there may be
gaps between it and the indoor unit. This may result in dripping water or other
problems.
• When deciding on placement, consider carefully the space around the ceiling
and make your measurements generous.
• Ceiling types and building construction differ. Therefore you should consult
with the builder and decorator.
• 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.)
• Use W3/8 suspension bolts .
E
• After suspending the indoor unit, you will have to connect the pipes and wiring
above the ceiling. Once the location has been fixed and the direction of the
pipes has been determined, place the refrigerant and drainage pipes, and
the wiring that connects the indoor and outdoor units in their desired locations
before suspending the indoor unit. This is especially important in cases where
the ceiling is already in existence.
• The packing material (cushion) is taped to the unit. When using the packing
material, do not remove it from the unit to prevent horizontal vane damage.
• Remove the packing material (cushion) before installing the plastic bag and
the cover.
• To prevent from dust, protect the indoor unit by covering with the plastic bag
and the cover.
• Remove the plastic bag and the cover before installing the grille (optional).
• When the distance between joints is 15-1/8 in. (348 mm) or less, please
refer to the notice affixed to the packing material.
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 2-3/8 in. (60 mm) long if the beams are separated
by not more than 35-7/16 in. (900 mm) and their sides must be at least
3-9/16 in. (90 mm) long if the beams are separated by as much as 6 ft.
(1800 mm).
• Use channel, duct and other parts procured locally to suspend the indoor
unit.
2) Ferro-concrete structures
• Secure the suspension bolts using the method shown, or use steel or
wooden hangers, etc. to install the suspension bolts
• When the unit is put down with its lower surface facing down, place packing
material (cushion) underneath to prevent horizontal vane damage.
13/16
.
E
Use inserts rated at
220 to 330 lb (100-
150 kg) each
Align center of ceiling opening and bolt distance
Air
Outlet
outlet
(underside)
2-1/8 41-3/8
45-11/16 Ceiling opening
47-1/4 Grille outlet
Align center of ceiling opening and bolt distance
Air
Outlet outlet
(underside)
54.5 1051
20 1160 Ceiling opening
1200 Grille outlet
Do not remove.
Horizontal vane may be damaged.
Packing material (cushion)
Cover
Roof beam
Beam
Rafter
Ceiling panel
Suspension bolts W 3/8
unit: inch
2-1/8
13/16
unit: mm
54.5
20
Plastic bag
C channel
Channel suspension
bracket
Suspension bolt
Steel reinforcing rod
En-4