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Make Electrical Connections - Whirlpool WFCU Installation Instructions Manual

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Typical filter sizes are shown; however, any combination of filters whose area equals or exceeds the minimum area shown is
satisfactory.
Minimum Filter Requirements Chart
Disposable Filters
Airflow
Minimum Area—
Descriptor
sq. in. (cm
2
)
09
480 (3,096.8)
10
480 (3,096.8)
12
576 (3,716.1)
14
672 (4,335.5)
16
768 (4,954.8)
20, 22
960 (6,193.5)
If a central return air filter-grille is used, the furnace does not
require a filter.
To install a filter at the furnace only, use the following kits:
AFILT524 for side return on upflow installations.
WARNING
Electrical Shock Hazard
Disconnect power before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.
Thermostat
Install a room thermostat according to the instructions furnished
with it. Select a location on an inside wall that is not subject to
drafts, direct sunshine, or other heat sources.
Make the low voltage thermostat connections to the ignition
control board as indicated on the Wiring Connection Diagram in
"Troubleshooting."
1. Disconnect power.
2. Remove the screw from the furnace electrical connection
box.
3. Remove the cover from the furnace electrical connection box.
4. Route the field supply wires to the furnace electrical
connection box.
18
Size—in. (cm)
Quantity
20 x 25 (50.8 x 63.5)
1
20 x 25 (50.8 x 63.5)
1
16 x 20 (40.6 x 50.8)
2
20 x 20 (50.8 x 50.8)
2
20 x 20 (50.8 x 50.8)
2
20 x 25 (50.8 x 63.5)
2

Make Electrical Connections

Cleanable Filters
Minimum Area—
sq. in. (cm
2
)
Size—in. (cm)
240 (1,548.4)
16 x 20 (40.6 x 50.8)
240 (1,548.4)
16 x 20 (40.6 x 50.8)
288 (1,858.1)
16 x 20 (40.6 x 50.8)
336 (2,167.7)
20 x 20 (50.8 x 50.8)
384 (2,477.4)
20 x 20 (50.8 x 50.8)
480 (3,096.8)
20 x 25 (50.8 x 63.5)
AFILT529 for bottom return on upflow furnace installations.
WAFILTHA7 for single side return in installations requiring
more than 1,600 CFM nominal air delivery.
5. Using UL listed wire connectors, connect the field supply
wires to the furnace (black to black and white to white).
WARNING
Electrical Shock Hazard
Electrically ground furnace.
Connect ground wire to green ground screw.
Failure to do so can result in death or electrical shock.
6. Connect ground wire to green ground screw.
Quantity
1
1
1
1
1
1

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