Holman qt14 - Manual (Page 18)

IF FURTHER ASSISTANCE IS REQUIRED:
CONTACT STAR/HOLMAN FACTORY SERVICE TEAM AT 1-800-807-9054
16
DRIVE CHAIN
DRIVE SPROCKET
DRIVEN SPROCKET
REPLACING BELT DRIVE MOTOR
Turn power off and allow cooling fans to run until the control box is cooled off.
DISCONNECT UNIT FROM POWER SUPPLY OR TURN POWER OFF AT WALL BREAKER.
NOTE: PERFORM THIS MAINTENANCE ONLY WHEN THE
CONVEYOR SANDWICH WARMER IS COMPLETELY COOL.
1. Remove the unload tray and crumb trays.
2. Lift the machine to stand on the unload end. The machine can then be rotated again to rest it on the
top. This will give the most stable access to the bottom control box area.
3. Remove the panel with the power input box and bottom control box cover.
4. Loosen the screws holding the motor in place. Slide the motor to loosen the chain. Remove the
chain. Remove the sprocket on the motor by loosening the setscrew and sliding the sprocket off.
5. Disconnect the drive motor leads to the internal wiring. The motor can be used in 208 or 240 volt
ovens. Note how the old motor is wired for replacement. For reference, use the black and white
wires for 208 volt ovens and the black and blue wires for 240 volt ovens. The unused wire should be
taped on the end and bundled with the existing wires so it will not get tangled in any moving parts.
6. Remove the screws holding the motor in place and remove the drive motor.
7. Install the new motor in place and loosely re-attach using the screws removed earlier.
8. Replace the sprocket onto the motor shaft and replace the chain onto the sprockets.
9. Slide the motor until the drive chain has about 1/8” slack when lightly pushed at the center of the
upper section. Tighten the drive motor screws. Align driver and driven sprockets and tighten the
setscrews onto the flat areas on the motor and drive shafts.
10. Rewire the new motor as noted in the disconnect instructions above.