I Combination Units Installation Instructions
Downflow Conversion
These units are adaptable to downflow use. To convert to down-
flow use, follow these steps:
1. Remove the blockoff plates found in the return air compart-
ment and the supply air compartment. See FIGURE 4 for
plate location.
NOTE: Blockoff plate in the supply air compartment only contains
one screw. If reinstalling plate, back part of plate MUST fit into
mating dimples on flange. To reinstall, slant plate into dimples,
then put plate into position and fasten with screw.
2. Install the removed plates on the horizontal return and sup-
ply air openings.
3. Install roof curb on your building. Be sure to follow all direc-
tions included with curb and all applicable building codes.
FIGURE 5 J Heating Vent Assembly
Flue Support
(Shipped moume(:lto unit)
Flue Cover
/
4. Install unit on the appropriate roof curb.
NOTE: It is the installer's personal responsibility to follow all local
codes and ordinances and instructions contained herein, as well
as instructions included with accessory items when installing unit.
Blockoff Plate (Return Air Compartment)
Heating Vent Assembly
The flue cover is packed with screws in the return air compart-
ment. Refer to FIGURE 5 and assemble as shown.
CAUTION
DO NOT OPERATE THE UNIT WITHOUT THE VENT AS-
SEMBLY INSTALLED
Condensate Drain
A3/4" O.D. condensate drain connection is located at the front end
of the unit. A 3/4" drain line MUST be installed if required by local
codes or location of unit, and run to an open drain or other suitable
disposal point. A condensate trap MUST be installed as near
the unit as possible for proper drainage.
Condensate Trap
Condensate trap MUST have proper height and fall as shown in
FIGURE 6,
FIGURE 6 ] Condensate Trap
25-1/2 ("B" Chassis)
("C" Chassis)
3/4" (19.1mm)
Threaded Female
PVC Fitting
4-1/2
_(25.4mm)
)
2" (50.8mm)
\
3/4" (19.1mm) '
Drain Line
* Condensate trap MUST be installed.
50901 110202 [_]
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