Bard 2100-066 Rev. A - Manual (Page 12)

□ initiate appropriate seasonal demand from the thermostat
with fan switch on auto; □ Heat □ Cool
1. if making heating unit checks, demand is created by turning
thermostat to highest setting with mode switch on heat.
2. if making cooling system checks, demand is created by
turning thermostat to lowest setting with mode switch on
coo!.
3. if the electric frimace employs an outdoor thermostat for
staging of heat elements, set the dial at its highest setting to
initiate a multiple stage demand. Return dial to original set
points before leaving the site.
Blower Compartment Check
□ Check supply voltage at unit junction box.
__________ vac _______________ time
1, Remove access doors on front of unit,
2, Set volt-ohm meter above 120 vac,
3, Attach volt-ohm meter probes to incoming line voltage and
neutral wires in junction box.
□ Check blower motor amperate^ A.
_^Nameplate A rating
1. Snap amprobe around neutral or common wire leading to the
blower motor.
2, In order to stimulate the tme operating condition, put blower
compartment door in place. Leave a small opening to allow
for reading the amprobe.
3. Compare amp reading with amp rating on motor nameplate.
An excessive amp draw reading is a clue the motor is
working too hard. Possible causes:
Extremely dirty motor prevents air from dissipating heat
and motor runs hot. Seized or worn bearings cause excess
pull or drag; motor (and/or pulley on belt drive blowers)
improperly sized in relation to blower wheel. Poorly
designed system application.
if following service checks do not alleviate high
motor amperage, refer problem to residential equipment
troubleshooter or service manager.
4, Remove blower compartment door.
□ Turn power at unit main disconnect to off.
□ Check all wiring for loose connections and bad insulation.
I, Tighten loose connections. Wrap electrical tape around wires
with cracked or worn insulation.
□ Clean or change filter.
NOTE: See unit installation instructions for removing filters from
downflow furnaces.
Nondisposable Slab (Polyurethane)
1. Remove filter from unit.
2. Remove media from frame.
3. Wash or vacuum media.
4. If media is washed, use hot water and detergent,
5. Squeeze water from media, put in frame and coat side of
media opposite the blower with a filter spray (the oil spray
enhances collection of dirt particles).
6. Place filter back into unit.
Disposable Slab (Fiberglass/Cardboard)
1. Remove filter from unit.
2. Wrap in newspaper and discard.
3. Place new filter of same size in unit. Make sure filter is
placed so that arrows on filter frame agree with system
airflow, if applicable.
Direct Drive Blower
A
WARNING
Be sure power to furnace is off.
10