Middleby Marshall PS224 PS310, PS570 Section, Reference, point preventative maintenance checklist

SECTION 5 - REFERENCE

			SECTION 5
			REFERENCE
			25-point preventative maintenance checklist
[	]	1.	Check and clean (blow out) machinery/control compartment.
[	]	2.	Check and clean (blow out) main blower motors.
[	]	3.	Check and clean (blow out and brush) axial fans.
[	]	4.	Check burner blower motor and fan operation.
[	]	5.	Check and clean igniter assembly.
[	]	6.	Check and clean all orifices.
[	]	7.	Install pilot tee if oven is not so equipped.
[	]	8.	Check gas pressures; adjust as necessary.
[	]	9.	Check air-fuel mixture; adjust as necessary.
[	] 10.		Check ignition cable for signs of deterioration.
[	] 11.		Check and tighten all electrical connections.

[] 12. Inspect conveyor belt for damage; repair as necessary.

[] 13. Inspect conveyor frame pivot plates.

[] 14. Inspect conveyor shaft bushings - Replace drive side bushing.

[] 15. Check conveyor drive chain tension; adjust as necessary.

[] 16. Verify proper air finger arrangement; correct as required.

[] 17. Inspect and clean (vacuum) conveyor motor and motor brushes.

[ ] 18. Inspect conveyor motor sensor and magnet; verify correct spacing; adjust as necessary.

[] 19. Check conveyor speed control; verify belt speed to be within 10 seconds of set point.

[] 20. Verify that proper number of thermocouples are installed.

[] 21. Check temperature control with thermocouple source to verify accuracy.

[] 22. Check high limit safety circuit with thermocouple source to verify correct operation.

[] 23. Check cool down feature with thermocouple source to verify correct operation.

[] 24. Using the “read” function of the temperature controller, verify and record the high ambient reading.

[] 25. Verify positive ignition on cold start.

172