CCI Thermal Technologies HP - High Pressure Heat Exchanger Unit Heater - Manual (Page 10)

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1. Remove bolts holding motor to the motor mount.
2. Remove the two piece fan guard assembly.
3. Lift the motor assembly off the motor mount.
4. Before removing the fan, measure and record the location of the fan hub on the motor shaft. If fan is difficult
to remove, use a gear puller on the fan hub.
5. To reassemble, position fan on motor shaft, and tighten set screws.
6. Place motor assembly onto motor mount, and fasten the fan guard to cabinet.
FAN MOTOR - REMOVAL AND INSTALLATION
1. The sheaves on the fan motor and fan drive may be removed by removing the cap screws from the
bushings.
2. Thread the cap screws into the threaded removal holes and progressively tighten the cap screws until the
sheave and bushing are loose and slide off the shaft.
3. To install; first slide the sheave with the bushing and cap screws in place onto the shaft. Align the sheaves.
4. Tighten the cap screws alternately until a torque of 10.8Nm (8ft.-lbs) is achieved. DO NOT over torque,
damage may result.
DRIVE SHEAVES - REMOVAL AND INSTALLATION
1. Remove the complete fan guard assembly as described in the Fan Guard section.
2. Support the fan drives frame, then remove the bolts fastening it to the heater. Lower frame from the heater.
DRIVE FRAME - REMOVAL
The ball bearings used on the FR/HP-36 heaters are of the extended inner ring type, which use an eccentric
self-locking collar for a positive locking action of the shaft.
1. The fan shaft bearing may be serviced either on the heater by removing the upper fan guard panel or first
removing the whole drive frame from the heater.
2. Remove the v-belt and the drive sheave as described in the appropriate section.
3. Measure and record the distance from the end of the shaft to the bearing housing.
4. Loosen the set screws in the locking collars. Unlock the collars by placing a drift punch in the collar hole and
hit the punch opposite to the direction of shaft rotation.
5. Loosen and remove the bolts fastening the bearing to the bearing support and slide bearings off the shaft.
NOTE: It may be necessary to file the burr left by the bearings set screws on the shaft, in order to remove
the inner bearing.
6. To install new bearings; slide the bearings and locking collars onto the shaft with the locking collars facing
each other. Bolt bearings onto the bearing support. Position shaft using the measurement taken in Step 3.
7. Assemble locking collars to the bearing, turning them in the direction of shaft rotation and use a drift punch
to tighten the collar in place. Then tighten the set screws in the locking collars.
8. Reassemble the unit, ensuring the sheaves are aligned and the v-belt is tensioned as described in the
appropriate sections.
FAN SHAFT BEARINGS - REMOVAL AND INSTALLATION
1. Remove the fan guard assembly as described in the Fan Guard Section.
2. Remove the drive frame as described in the Drive Frame Section.
3. Remove the set screws on the fan hub and remove the fan from the shaft. NOTE: if the shaft is corroded it
may be necessary to replace the shaft.
4. To reassemble, slide the shaft into the fan hub until the end of the hub. Ensure that the two flats on the shaft
align with the set screws in the fan hub. Then tighten the fan’s set screws.
FAN - REMOVAL AND INSTALLATION