securing the cover to the unit base and slide out the cover.
Discard the cover. Install filler bracket removed in Step 7.
10. If unit ductwork is to be attached to vertical opening flanges
on the unit base (jackstand applications only), do so at this
time.
11. It is recommended that the unit base insulation around the
perimeter of the vertical opening be secured to the unit base
with aluminum tape to prevent the insulation from tearing
or bunching up when the blower housing is installed in the
vertical discharge position.
12. Orient blower housing for vertical airflow (blower motor
adjacent to horizontal duct opening) and slide into vertical
opening making sure the flanges on the blower side plates
engage the tabs in the unit base (See Fig. 15). Resistance
will be felt as the blower housing contacts the unit base
insulation; this can be overcome by applying a slight force
to the base of the blower. Continue sliding blower in until
hole in side plate flange aligns with the hole in the unit base.
Secure using screw removed in Step 7. Reconnect indoor-
fan motor leads and insert wire tie back into unit control
box.
13. Cover the horizontal duct openings. Duct covers can be
ordered as an accessory or field fabricated (See Fig. 20).
14. Reinstall the indoor coil and indoor blower access panels.
15. After completing unit installation, perform all safety checks
and power up unit.
B.
CONFIGURING UNITS FOR DOWNFLOW (VERTI-
CAL) DISCHARGE-ECM UNITS (048–060)
Units 048–060 (Units with ECM Indoor Blower Motors) are
shipped in a horizontal configuration. To convert a horizontal unit
for downflow (vertical) discharge, perform the following steps:
Fig. 20—Field-Fabricated Duct Cover
C95019
14 11/16” (372)
13 3/4” (348)
3 3/4” (94)
0
0
10 5/8” (270)
9/32” (7) TYP
19” (482)
22-GAGE SHEET
METAL COVER (SEE ABOVE)
4 ADHESIVE-BACKED SPONGE RUBBER
SEAL STRIPS-1/8”
(3.2)
THICK
31 3/16” (792)
9 11/16” (245)
21 9/16” (547)
11/32” DIA (8 Places/Holes)
11/16” (17) TYP
1 3/4” (43) 0
SEAL ALL FOUR CORNERS
WITH SILICONE SEALER
1//2-IN. THICK, 1-lb
. DENSITY FIBERGLASS INSULATION
WITH ALUMINUM FOIL BACKING; SECURE WITH ADHESIVE
TABLE 2—MINIMUM AIRFLOW FOR SAFE ELECTRIC HEATER
OPERATION (CFM)
SIZE
024
030
036
042
048
060
700
875
1225
1225
1400
1750
—13—
