Loren Cook Company AC Exhauster ACRU-HP

Warning: This procedure requires trained personnel with PPE!

Burrs removed from the shaft by sanding

New bearings slid onto the shaft and loosely mounted onto the bearing support

Wheel correctly positioned and bearing bolts securely tightened to the bearing support

Setscrews aligned bearing to bearing and secured tightly to the shaft

NOTICE! Never tighten both pairs of setscrews before securing bearing mounting bolts. This may damage the shaft.

Sign off on the fan bearing replacement

Warning: Handle the AC fan and accessories with care during inspection

AC fan and accessories free of damage

AC fan wheel turns freely and does not bind

Dampers (if included) have free operation of all moving parts

Record any visible sign of damage on the Delivery Receipt

Sign off on the initial AC fan inspection

Warning: Stop the fan before inspection!

Bolts inspected and tightened as necessary?

Setscrews inspected and tightened as necessary?

Motor mounting bolts inspected and tightened as necessary?

All belt driven ventilators (5HP or less) are equipped with variable pitch pulleys. To change fan speed, perform the following:

1. Loosen setscrew on driver (motor) pulley and remove key, if equipped.

2. Turn the pulley rim to open or close the groove facing. If the pulley has multiple grooves, all must be adjusted to the same width.

3. After adjustment, inspect for proper belt tension.

Open the pulley in order that the belt rides deeper in the groove (smaller pitch diameter).

Close the pulley in order that the belt rides higher in the groove (larger pitch diameter). Ensure that the RPM limits of the fan and the horsepower limits of the motor are maintained.;

Inspection of the fan should be conducted at the first 8 hour interval of satisfactory operation.

During the inspections, stop the fan and inspect as instructed.

Inspect belt alignment and tension. Adjust and tighten as necessary.;