CCI Thermal Technologies HP - High Pressure Heat Exchanger Unit Heater - Manual (Page 9)

9
REPAIR AND REPLACEMENT PROCEDURES
The fan guard consists of a removable upper panel and a frame bolted to the heater cabinet. For most service
procedures it is necessary only to remove the upper removable panel. In cases where the complete fan guard is to be
removed, assistance will be required due to its size and weight. To remove the complete fan guard:
1. Disconnect the wiring from the motor.
2. Remove the bolts fastening the fan guard to the cabinet and slide the fan guard past the motor.
1. Remove the bottom cover which is attached with #10 screws and 1/4” bolts.
2. Take out the four 1/4” or 5/16” bolts on each side of the cabinet.
3. When removing the core assembly, it will usually be necessary to have assistance in order to handle it safely. In
some instances, dismounting the complete heater from support structure may be advisable to allow core assembly
removal at ground or bench level.
WARNING!
Disconnect heater from power supply before servicing or repairing heater. Lock the switch in the
“OFF” (open) position and/or tag the switch to prevent unexpected power application. This heater
should only be serviced by personnel with heating equipment experience. Some components of this
heater are heavy and assistance will be required to remove them.
CORES
1. Remove the #10 screws that attach the fan guard to the cabinet.
2. Remove the motor, fan and fan guard together by removing the four 5/16” carriage bolts and nuts that attach the
motor to the motor bracket.
3. Before removing the fan from the motor shaft, measure the distance between the fan hub and the motor end face.
Make a note of this dimension to permit installation of the fan in the correct position at reassembly. The fan guard
must first be positioned over the motor shaft before the fan is installed on the shaft
REMOVAL OF FAN, FAN GUARD OR MOTOR
(All models except FR/HP 36)
FR/HP 36 FAN GUARD
1. Remove upper fan guard panel.
2. Slide motor mount up to relieve the tension to the v-belt and remove the v-belt.
3. Before installing a new v-belt, ensure that the sheaves are properly aligned. (See Drive Sheave Section)
4. Install the new v-belt and tension it by sliding the motor mount down until the v-belt will only move 10 to 16 mm
(3/8 to 5/8 in.) when 68N (15 lbs) of force are applied to the belt midway between the sheaves. Ensure that the
motor is level and then tighten the bolts fastening the motor mount to the drive frame.
5. Replace upper fan guard panel.
6. After a few days of operation the new v-belt will seat-in and may require adjustment.
V-BELT-SERVICE - REMOVAL, INSTALLATION AND TENSIONING