Operating instructions

Pub. No. 18-HE53D1-5 Numbers in [brackets] are for 50 Hz international systems. 7
Installer’s Guide
DOWNFLOW FURNACE INSTALLATION
NOTE: On 90% Downflow Furnaces, the intake and
exhaust (flue) are located on top. A field supplied
transition is needed between the furnace and the air
cleaner. The transition must be long enough to avoid
any interference between the intake and exhaust pipe
routing and the door of the air cleaner. The door and
internal components must be removable for servicing.
1. Rotate the two quarter turn latches on the Power Door
outward then rotate the Power Door to remove it from
the cabinet. Remove the PRE-FILTER, FIELD
CHARGER, and both COLLECTION CELLS. Set the
components aside until the cabinet is installed and the
indoor unit is in place.
NOTE: Cut the front duct flange 2" from each side and
fold flat to clear the Power Door latches. Some applica-
tions may require a transition for piping clearances.
See Figure 17.
NOTE: Remove filter rack from downflow Furnace and
discard.
2. Bend the 4 mounting tabs down on the two sides of the
air cleaner cabinet. These can be used to attach the air
cleaner cabinet to the furnace. See Figure 18.
3. Install the self-adhesive gasket material on the side of
the air cleaner cabinet flange that will mate with the
indoor unit. This flange has a double set of holes. See
Figure 15.
4. Apply tranisitions or spacer as required to clear flue
piping and to ensure the opening of the air cleaner
matches the opening in the furnace. Position the air
cleaner on the return opening of the furnace with the air
cleaner cabinet gasket against the furnace. Check that
the front of the air cleaner cabinet is facing the front of
the furnace.
indoor unit. This flange has a double set of holes. See
Figure 15.
3. On a protective pad, lay the indoor unit on its side.
4. Position the air cleaner on the return opening of the
indoor unit with the air cleaner cabinet gasket against
the indoor unit. Check that the front of the air cleaner
cabinet is facing the front of the indoor unit.
5. Align the rear of the air cleaner flush with the rear of
the indoor unit.
6. Align the sides of the cabinet with the sides of the unit.
7. The front of the cabinet will NOT align flush with the
front of the unit.
8. Securely fasten the unit using the self-tapping sheet
metal screws provided. See Figure 15.
9. Install unit in place and secure.
10. Reinstall the FIELD CHARGER and lock into place by
bending one locking tab on the cabinet. See Figure 16.
Figure 16 Locking Tab
11. Reinstall the PRE-FILTER and COLLECTION CELLS.
12. Each cell must be oriented with the handles toward the
front.
13. The door can be installed in either direction. Deter-
mine which direction will best allow access to the
latches and 24 Volt power cord. Insert the 2 tabs on the
door into the slots in the cabinet flange and rotate the
door into the closed position. Rotate the two quarter-
turn latches on the Power Door inward. See Door
Operation Section C.
14. Remove stickers (two stickers both are 5.5" x 7.5")
from packet and attach to furnace, air handler, or
ductwork in a location visible to the homeowner.
15. Demonstrate Maintenance (Section H) and Door
Operation (Section C) to the homeowner.
Figure 18 Mounting Tabs
Figure 17 Duct Flanges
Figure 15 Installation Details
Use inner double
set of mounting
holes.
Install gasket material.
Cut to length required.
Field Charger
Locking Tab
Actuator Tab for
Interlock Switch