Preventative Maintenance Schedule. Despatch 924E, 925E, 926E

Preventative Maintenance Schedule

Insure trouble-free service by performing preventive maintenance when appropriate.

Should service be required, specific procedures are described to locate and repair malfunctions.

Item Description Reading

1. Inspect door seals checking for proper seating, damage or tears. Adjust and/or replace as necessary.

Months of

Operation

1 3 6

X

9 12

2.

3.

Inspect the door operation. Should open and close easily.

Inspect recirculation fan. Make sure it is clean and free of dust build-up.

X

X

4. X Measure and record the line voltage. If the voltage is not

±10% of the nameplate specification, discontinue use and take corrective action.

6.

7.

Measure and record the recirculation fan motor current draw. X

X Measure and record the amp draw of the air heater. Verify the actual amps with the amp draw listed on the electrical schematic.

8. X Make a visual inspection of the control panel area. Make sure the electrical components are clean and free of dirt or dust buildup. CAUTION: CLEAN ONLY AFTER TURNING OFF

THE POWER AT THE POWER SOURCE.

9. X Inspect the equipment instrumentation. Check the controller, limit controller(s), and recorder calibration using a certified calibration standard. Update the calibration standards.

Complete a certificate if required.

10. X Check for proper operation of the High and Low limit controllers. Adjust the limits to assure they will "trip" in an over-temperature condition.

11. X Overall functional test. Operate the equipment and check the functionality of the heating, cooling (if equipped) systems.

Adjust controller tuning if necessary.

12. Record all parameters in the control instrument. Keep a copy on sight and send a copy to Despatch.

X

34