Pulley And Drive Adjustment; Condensate Drains; Return-Air Filters; Coil Removal - Bryant 524J Series Installation, Start-Up And Service Instructions Manual

4. If pulleys are not in correct alignment, loosen the motor hold-
down bolts and slide the motor axially until the pulleys are
aligned.
5. Tighten motor holddown bolts.

Pulley and Drive Adjustment

To obtain desired fan speed, refer to the fan motor, drive data
and performance data in Tables 11-24 and adjust fan motor
pulley as follows:
1. Remove belt from fan motor pulley after loosening motor
from motor base.
2. Loosen setscrew in moveable flange of pulley. Screw
moveable flange toward fixed flange to increase the fan speed
and away from fixed flange to reduce speed. Before
tightening setscrew, make certain that setscrew is over nearest
flat surface of pulley hub. (See Fig. 25.)
CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution could cause equipment damage.
Increasing fan speed produces a greater load on motor. Do not
exceed rated capacity of motor.

Condensate Drains

Keep condensate drains free of dirt and foreign matter.

Return-Air Filters

Refer to Replacing Filters section for filter accessibility and
removal. Replace with clean filters of the sizes listed in Tables 1-4.
IMPORTANT: Draining from return line will not completely
drain water from coils.
• After draining as much water as possible from coils, add
sufficient antifreeze to prevent residual water in the coil
from freezing.
• Add a sufficient quantity of non-corrosive antifreeze to the
entire system to prevent all water within the system from
freezing.

Coil Removal

Remove unit panels and corner posts as required. Disconnect
coil connections and remove fastening screws. Remove coil
through end or side sections of unit.

Cleaning Cooling Coil

Remove return-air filters. Remove any heavy dirt that may
have accumulated on underside of coil. Coil can be cleaned
more easily with a stiff brush, vacuum cleaner, or compressed
air when coil is dry. If coil is wet or if water is to be used for
cleaning, guard against splashing water on electrical compo-
nents or damaging surrounding area. Clean coil baffles as ap-
plicable and check for tight fit to be sure air does not bypass
coil.

Cleaning Insulation

The insulation contains an immobilized antimicrobial agent
that helps inhibit the growth of bacteria and fungi. Clean the
inner surface of the insulation according to the separate main-
tenance instructions shipped with the unit.

Replacing Filters

Filters can be removed and installed from either side of the
unit. Install new filters in units that have one fan as follows:
1. Remove the side access panel (retain screws).
2. Remove the filter retainer clip (see Fig. 26).
3. Remove old filters by lifting and tilting them out of the filter
track. (See Fig. 14 and 27.) Use the factory-supplied filter
hook to slide filters within reach for removal. The filter hook
is shipped inside the unit in the filter track.
4. Reverse the procedure to install new filters.
UNIT OPERATION HAZARD
Failure to follow this caution could cause equipment damage.
Do not operate unit without air filters.
Fig. 26 — Remove Filter Retainer Clip
Fig. 27 — Filter Removal/Replacement
24
CAUTION
Filter
Retainer
Clip