Individual Fan Wheel Adjustment; Fan Belts; Fan Rotation; Fan Pulley Alignment - International comfort products FHS Series Installation Instructions Manual

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 de-
flection. For units with motor sizes up to and including
3.7 Hp (2.76 kW), correct deflection is
larger motor sizes, correct deflection is
Fig. 24.
If complete belt replacement is required during servicing,
loosen the motor plate mounting bolts (see 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.
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
motor holddown bolts and slide the motor axially until
the pulleys are aligned.
30
Fig. 24 — Fan Motor Mounting
3 / -in. (4.8 mm). For
16
1 / -in. (3.2 mm). See
8
Specifications subject to change without notice.
5. Tighten motor holddown bolts.
Fig. 25 — Fan Rotation
Fig. 26 — Fan Pulley Adjustments
508 01 1603 01