Middleby Marshall PS520 III. Maintenance Every 3 Months, IV. Maintenance Every 6 Months

4.Reattach conveyor guard to control panel and secure two screws.

Install both upper end plugs.

Figure 4-34.

III. MAINTENANCE - EVERY 3 MONTHS

WARNING

Shut OFF all electrical power and lock/tag out the switch before attempting maintenance work.

NOTE: It is recommended that the 3-month mainte- nance be performed by an authorized Middleby Marshall technician.

SECTION 4

MAINTENANCE

A. Electrical Terminals

Open the control cabinet door by removing the three screws from the control cabinet door. Tighten all electrical control terminal screws including the electrical contactor terminal screws as shown in Figure 4-35.

Figure 4-35.

B. Ventilation

Check that the air circulation throughout the oven is not blocked and is working properly.

IV. MAINTENANCE - EVERY 6 MONTHS

A.Check brushes on D.C. conveyor motor, when worn to less than 1/10″ (2.4mm), replace the brushes.

B.Check your oven venting system.

IMPORTANT NOTICES:

•Installation of replacement parts requiring access to the interior of the oven is permitted only by an authorized service technician.

•If there are any problems with the operation of the oven, the authorized service technician must be called.

•It is suggested to obtain a service contract with a manufacturer’s authorized service technician.

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