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plumbing. The new hose is fitted with a 90º swivel at the manifold end and a straight swivel at the
pump end to prevent kinking.
The pump plumbing features a solenoid valve at the pump discharge, a ¼” I.D. Dormont stainless
steel flexline that connects the solenoid valve to the pump inlet fittings, and miscellaneous standard
black metal fittings for connections. This design allows oil to bypass the pump as it drains from the
oil return lines back into the filter pan when the system is turned off. Bypassing the pump expedites
draining of the lines. The pump solenoid leads are connected to Pins 7 and 9 of the upper 9-pin plug
assembly of the filter box.
Filter Wiring Box
The original-design 5-lead cable connecting the filter assembly to the filter wiring box has been
replaced with a new, universal 7-lead cable to accommodate the solenoid mounted on the front
manifold. The two new leads have a separate connector for attachment to the solenoid. When a
filter cable is ordered for either filtration system configuration (original or redesigned), the new
7-wire cable will be sent. The two extra wires and connector will not interfere with the original
filtration system or its operation.
Verifying Solenoid Operation
Proper operation of the 24VAC manifold and pump solenoids can be verified by removing the pump
motor lead from terminal 4 of the pump motor relay in the filter wiring box and then activating the
oil return lever. Proper solenoid operation will be evidenced by an audible “click” or vibration of
both the pump solenoid and the manifold solenoid.
1.7.6 Leakage
Leakage of the frypot is usually due to improperly sealed high limit thermostats, temperature probes,
and drain fittings. When installed or replaced, each of these components must be sealed with
Loctite
®
PST56765 sealant or equivalent to prevent leakage and torqued to 180 inch-pounds. In
very rare cases, a leak may develop along one of the welded edges of the frypot. When this occurs,
the frypot must be replaced.
If the sides and/or ends of the frypot are coated with oil, the most likely cause is spillage over the top
of the frypot rather than leakage.
The clamps, which hold the drain tube sections together, may loosen over time as the tubes expand
and contract with heating and cooling during use. If the section of drain tube connected to the drain
valve is removed for whatever reason, make sure that its grommet is in good condition and properly
fitted around the nipple of the drain when it is reinstalled. Also, ensure that the drain tube runs
downward from the drain along its whole length and has no low points, where oil may accumulate.
1.7.7 Basket Lift Malfunctions
H50 Series fryers may optionally be equipped with automatic basket lifts to ensure uniform cooking
times. Basket lifts will always come in pairs, although each operates independently of the other.
Depending upon the specific model, date of manufacture, and customer specifications, an H50 fryer
may be equipped with a bell crank style basket lift, or a “modular” basket lift.