Mitsubishi Electric MVZ-A12 AA4 Manuel D'installation page 7

8. Duct connection
-See the outline drawing for the size of the duct connection.
-Use fl anged ducts for connections to return
-Do not use sheetmetal screws longer that 0.75" to secure any
ductwork to the air handler
9. Mount positions
9.1. Vertical installations
The air handler must be supported on the bottom only and set on
a solid fl oor with a return plenum below or fi eld supplied supporting
frame or plenum. Securely attach the air handler to the fl oor or
supporting frame or plenum.
A single side return can be used for the MVZ-A12, MVZ-A18
and MVZ-A24 only. Dual side returns must be used on all other
models to ensure proper air fl ow. If the side return is used it is the
responsibility of the installer to ensure the ducts are properly
sized and sealed to the cabinet. When cutting in to the side
of the cabinet, use the provided dimples to avoid damaging any
internal structure or wiring.
PLENUM
FILTER
FILTER
DUAL SIDE RETURN
SEAL BOTTOM OF AIR HANDLER
ADD TWO FILTERS
FILTER
SINGLE SIDE RETURN (MVZ-A12, A18 & A24)
SEAL BOTTOM OF AIR HANDLER
ADD FILTER
0.75" MAX
SIDE RETURN
PLENUM
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