INSTALLATION INSTRUCTIONS
Modular Blower: MB
442 01 2405 01
3
Specifications subject to change without notice.
Figure 2
Attach Coil to Blower Cabinet
Panels
removed
for clarity only
Place seal
on top of
Coil Cabinet
around
perimeter
Bend Tabs (both sides
and back) on Bottom of
Blower Cabinet to Fit
over Coil Cabinet
Figure 3
Upflow/Downflow Airflow Positions
NON-DUCTED RETURN AIR CLOSET
INSTALLATION
The cabinet can be installed in a closet with a false bottom to form a
return air plenum, or mounted on an open platform inside the closet.
Platform should be high enough to provide a free (open) area for
adequate return airflow into the bottom of the cabinet. The open area
can be on the front side or a combination of front and sides, providing
there is clearance on the sides between cabinet and closet.
Refer to
ACCA Manual D for sizing and free area recommendations.
NOTE:
Local codes may limit application of systems without a ducted
return to single story dwellings.
HORIZONTAL LEFT AND RIGHT
INSTALLATIONS
The modular blower cabinets can be installed in either downflow, horizontal left, or
horizontal right applications. When a coil cabinet is applied, refer to the coil installation
manual for proper drain pan and airflow requirements. They must have the drain pan
repositioned for right hand airflow. Refer to coil installation manual.
!
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage.
A field fabricated auxiliary drain pan, with a separate
drain is REQUIRED for all installations over a finished
living space or in any area that may be damaged by
overflow from a restricted main drain pan. In some loca-
lities, local codes require an auxiliary drain pan for ANY
horizontal installation.
Figure 4
Horizontal Airflow Positions
SUSPENDED CABINET INSTALLATION
1. The cabinet may be supported on a frame or shelf, or it may be
suspended.
2. Use metal strapping or threaded rod with angle iron supports
under the auxiliary drain pan to suspend cabinet. These
supports
MUST
run parallel with the length of the cabinet
(
Figure 5
).
3. Ensure that there is adequate room to remove service and
access panels after installing supporting brackets.
4. Place field installed vibration isolators in auxiliary drain pan to
support cabinet.
DUCT CONNECTIONS
Supply Duct
Supply duct must be attached to the outside of flange on outlet end of
unit. Flexible connectors may be used if desired.
Return Duct
Return duct should be attached to bottom of unit using sheet metal
screws or other fasteners.
FILTER INSTALLATION
Filters must be field supplied. A remote filter grille or other means
must be provided. Refer to ACCA Manual D for remote filter sizing.