Frymaster BIH52 - Manual (Page 45)

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oil/shortening to drain back to the filter pan when the filter system is turned off, eliminating the need
for most heated oil return components.
Operation of the
redesigned FP-III system is the same as for the original design.
ORIGINAL VS REDESIGNED FP-III FILTRATION SYSTEM
Original System Redesigned System
Return lines and manifolds wrapped with silicone
strip heaters and aluminum tape. No heater strips or aluminum tape on return lines.
Filter base assembly connected to unit with a
black, heated return hose beneath the filter. Non-heated Teflon hose with a swivel joint con-
nects the filter base assembly to the unit above
the filter.
Filter base assembly equipped with swivel cast-
ers. Filter base assembly has no casters.
Operator-removable filter base assembly. (Filter
base assembly stoplocks in cabinet can be ro-
tated to remove tray.) Filter base assembly is not removable except by
a qualified service technician. (Filter base as-
sembly stoplocks fitted with a screw and nut to
prevent filter removal.)
Oil/shortening remains in return lines when filter
system is turned off. Oil/shortening gravity-drains back to the filter pan
when filter system is turned off, leaving no oil or
shortening in return lines.
Square Drain Sub-System
The only change to the square drain sub-system is the addition of a ¼” NPT vent coupling to the
leftmost end sections to allow attachment to a vacuum-breaking solenoid. The new end sections may
also be used on the original-design filtration system by plugging the vent port with a ¼” NPT pipe
plug coated with sealant. All other square drain components remain unchanged.
Rear-Flush Sub-System
A one-piece, welded rear manifold and Dormont stainless steel flexlines replace the various pieces of
½” NPT piping, flexlines, and heater-strips used on the original-design filtration system. A solenoid
vent valve is attached at the left end of the oil return manifold mounted at the rear of the leftmost two
frypots. It prevents vacuum-lock of the system as oil/shortening 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. The Gemini ball valve used on the manifold is the same as
that used on the earlier design. Eight and one-half-inch stainless steel Dormont flexlines replace the
flexlines that connect the manifolds to the valves. Standard ½” X ½” X 90º black metal street el-
bows are used to make the connections.
Filter Base Assembly and Pump Sub-System
Casters are not present on the new-design filter base. In addition, the filter base assembly has been
redesigned to prevent it being taken out of the cabinet without removing a set of machine screws and
nuts. The filter pan is unchanged and is completely removable.
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
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 has been changed by the addition of 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,