35 SERIES GAS FRYERS
CHAPTER 5: PREVENTIVE MAINTENANCE
5-7
• Verify that wiring harnesses and connections are tight and in good condition.
Built-In Filtration System
• Inspect all oil-return and drain lines for leaks and verify that all connections are tight.
• Inspect the filter pan for leaks and cleanliness. If there is a large accumulation of crumbs in the crumb
basket, advise the owner/operator that the crumb basket should be emptied into a fireproof container
and cleaned daily.
• Verify that all O-rings and seals (including those on the Power Shower and on quick-disconnect fittings)
are present and in good condition. Replace O-rings and seals if worn or damaged.
• Check filtration system integrity as follows:
− With the filter pan empty, place each oil return handle, one at a time, in the ON position. Verify that
the pump activates and that bubbles appear in the cooking oil/shortening (or that gurgling is heard
from the Power Shower port) of the associated frypot.
− Close all oil return valves (i.e., place all oil return handles in the OFF position). Verify proper func-
tioning of each oil return valve by activating the filter pump using the lever on one of the oil return
handle microswitches. No air bubbles should be visible in any frypot (or no gurgling should be
heard from the Power Shower ports).
− Verify that the filter pan is properly prepared for filtering, then drain a frypot of oil heated to 350°F
(177°C) into the filter pan and close the frypot drain valve. Place the oil return handle in the ON po-
sition. Allow all cooking oil/shortening to return to the frypot (indicated by bubbles in the cooking
oil/shortening or, on units with Power Showers, cessation of oil flow from the Power Shower). Re-
turn the oil return handle to the OFF position. The frypot should have refilled in no more than 2
minutes and 30 seconds.
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