Bryant 524J manual Fan Rotation, Fan Pulley Alignment - Align as follows, Fan Pulley Adjustments

Individual Fan Wheel Adjustment - Loosen the 2 locking bolts holding fan wheel hub to shaft. See Fig. 22. Position fan wheel in center of the fan housing and tighten locking bolts. Clearance between wheel and housing should be the same on both sides.

Fan Belts - Motor mounting plate and motor support angles are slotted to permit both vertical and horizontal adjustment. Adjust belt(s) for correct deflection by loosening motor plate mounting bolts, moving motor/plate assembly forward or back, and re-tightening bolts. Press down on belt with one finger midway between fan and motor pulleys to check deflection. The correct deflection is 1/8-in. (3.2 mm). See Fig. 24.

If complete belt replacement is required during servicing, loosen the motor plate mounting bolts (Fig. 24), move motor/plate assembly towards fan pulley, and pull belt(s) off pulleys. Reverse the procedure with new bolts and readjust deflection.

Fan Rotation - Correct fan rotation with respect to fan outlet is shown in Fig. 25.

C10701

Fig. 25 - Fan Rotation

To reverse the direction of rotation of a 3-phase fan motor, reverse any 2 of the power leads. Refer to the connection diagram on the inside of motor terminal box cover for proper reversing procedure of single-phase motor.

Fan Pulley Alignment - Align as follows:

1.Loosen setscrews on pulleys.

2.Align pulleys visually and tighten setscrews on fan pulley to lock it in place.

3.Use the methods shown in Fig. 26 to check proper pulley alignment.

4.If pulleys are not in correct alignment, loosen the mo- tor holddown bolts and slide the motor axially until the pulleys are aligned.

5.Tighten motor holddown bolts.

C10702

Fig. 26 - Fan Pulley Adjustments

Pulley and Drive Adjustment - To obtain desired fan speed, refer to the fan motor and drive data in Tables

8A-11D 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 (Fig. 26).

!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 1A-1F.

S After draining as much water as possible from coils, add sufficient antifreeze to prevent residual water in the coil from freezing.

SAdd a sufficient quantity of non-corrosive antifreeze to the entire system to prevent all water within the system from freezing.

524J

21