Frymaster H50 Series manual 1-28

The oil return line heater tapes in the Filter Magic system are wired directly into the line VAC source and remain energized as long as the unit is plugged in. The filter pan suction tube heater tape, however, is wired into the 24 VAC circuit. The suction tube tape is activated only when the filter pan is positioned all the way to the rear of the cabinet, allowing a pair of “bullet” contactors mounted on the pan to touch a corresponding pair of contactors mounted on the cabinet frame.

For FootPrint III systems built before August 1997, all heater tapes are wired directly into the line VAC source. They remain energized as long as the unit is plugged in. In systems built in August 1997 and later, oil return line heater tapes have been eliminated. In these units, the only heater tape used is on the suction tube and pump. This tape is still wired directly into the line voltage. A pair of vacuum-breaking solenoids is wired into the 24 VAC circuit.

In units built from August 1997 onward, the oil return system allows oil to drain back to the filter pan when the filter system is turned off, eliminating the need for most heated oil return components. For a short time, one-piece, welded oil return manifolds were used. The one-piece manifolds have been replaced with Dormont stainless steel flexlines and nipples and are no longer available.

	PRE-AUGUST 1997 VS CURRENT DESIGN FP-III FILTRATION SYSTEM
	Original System	Redesigned System
	Return lines and manifolds wrapped with silicone	No heater strips or aluminum tape on return
	strip heaters and aluminum tape.	lines.
	Filter base assembly connected to unit with a	Non-heated Teflon hose with a swivel joint con-
		nects the filter base assembly to the unit above
	black, heated return hose beneath the filter.	the filter.
	Filter base assembly equipped with swivel cast-	Filter base assembly has no casters.
	ers.
	Operator-removable filter base assembly. (Filter	Filter base assembly is not removable except by
	base assembly stoplocks in cabinet can be ro-	a qualified service technician. (Filter base as-
	tated to remove tray.)	sembly stoplocks fitted with a screw and nut to
		prevent filter removal.)
	Oil remains in return lines when filter system is	Oil gravity-drains back to the filter pan when filter
		system is turned off, leaving no oil or shortening
	turned off.	in return lines.
Power Shower Sub-System

A solenoid vent valve is mounted on the left end of the front oil return assembly. It prevents vacuum-lock of the system as oil drains back to the filter pan when the unit is turned off. The solenoid valve is connected to the square drain sub-system by a clear ⅜” O.D. Teflon tube and threaded fittings. Stainless steel Dormont flexlines connect the manifolds to the valves. Standard ½” X ½” X 90º black metal street elbows are used to make the connections.

A 22-inch Dormont stainless steel flexline, running above the filter assembly, connects the front oil return assembly to the rear manifold.

Filter Base Assembly and Pump Sub-System

Casters have not been used on filter base assemblies built since August 1997. When the casters were eliminated from the filter base assembly, the assembly was redesigned to prevent it from being taken out of the cabinet without removing a set of machine screws and nuts.

A new Teflon hose with a braided stainless steel covering connects the pump to the rear manifold and replaces the heated hose running from the pump discharge under the unit to the Power Shower

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