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OPERATING
Electrical Control:
Note: Refer to the electrical schematic.
3-Port: The electrical control system must power one of
the two coils whenever the engine is running in order to
open the flow path from the fuel tank to the fuel pump.
Selection of the powered coil can be controlled remotely.
The electrical schematic shows how this can be achieved
using a double pole single throw switch. More elaborate
controls can also be utilized such as programmable
controllers.
6-Port: The electrical control system must power two of
the four coils whenever the engine is running, in order to
open the supply flow path from the fuel tank to the fuel
pump, and the return flow path from the engine to the fuel
tank. Selection of the powered coil can be controlled
remotely. The electrical schematic shows how this can be
achieved using a single double pole double throw switch,
or two double pole single throw switches. More elaborate
controls can also be utilized such as programmable
controllers.
Manual Override:
Both versions of the fuel selector valve incorporate an
emergency manual override. The override is operated by
rotating the red handle into one of two alternate positions.
In normal operating conditions (override disengaged) the
handle’s arrow points to “AUTO” marking on the valve
body.
3-Port: Rotating the handle so the arrow points to the
“TANK 1” position, opens the flow path from the “TANK 1
SUPPLY” port to the “ENGINE SUPPLY” port. Allowing
fuel to pass freely through this flow path. Alternately ,
rotating the handle so the arrow points to the “TANK 2”
position, opens the flow path from the “TANK 2 SUPPLY”
port to the “ENGINE SUPPLY” port. Allowing fuel to pass
freely through this flow path.
6-Port: Rotating the handle so the arrow points to the
“TANK 1” position, opens the flow path from the “TANK 1
SUPPLY” port to the “ENGINE SUPPLY” port and also
opens the flow path from the “ENGINE RETURN” port to
the “TANK 1 RETURN” port . This allows fuel to to pass
freely through both the supply, and return fuel paths.
Alternately , rotating the handle so the arrow points to the
“TANK 2” position, opens the flow path from the “TANK 2
SUPPLY” port to the “ENGINE SUPPLY” port and also
opens the flow path from the “ENGINE RETURN” port to
the “TANK 2 RETURN” port. This allows fuel to pass
freely through both the supply, and return fuel paths.
MAINTENANCE
Note: While the valves are design to operate over millions
of cycles, depending on service conditions, fluid being
used, filtration, and lubrication, it may be required to
periodically clean and/or replace worn components to
ensure optimum quality performance. See Disassembly
Instructions.
CAUTION:
Do not expose plastic or elastomeric materials
to any type of commercial cleaning fluid. Parts should be
cleaned with a mild soap and water solution.
DISASSEMBLY INSTRUCTIONS
WARNING:
Depressurize system and turn off electrical
power to the valve before attempting repair.
The coil must
not be energized unless it is installed on the valve.
Otherwise, the coil will overheat and burn out.
The valve body need not be removed from the line.
CAUTION:
When removing or replacing the valve
components, it may be necessary to provide proper
support to prevent the valve from rotating thereby causing
damage to piping.
To remove the coil assembly:
Note: Refer to the exploded view drawing.
Remove the coil retaining nut from the sleeve. Lift the coil
assembly off of the sleeve tube. Slide the coil out of the U-
shaped metal yoke.
To disassemble the incorporated valve operators:
Note: Before disassembly ensure the manual override
handle is in the “AUTO” position.
Note: Refer to the exploded view drawing.
Using two wrenches remove the sleeve from the adapter.
The plunger assembly and return spring may be removed.
To remove the seal guide, remove the adapter from the
body.
To disassemble the manual override assembly:
Note: Before disassembly ensure the manual override
handle is in the “AUTO” position.
Note: Refer to the exploded view drawing.
Using a 3/32” hex wrench, loosen the set screw within the
handle. Remove the handle from the override shaft. Using
a 5/32” hex wrench, loosen and remove the three socket
head cap screws, from the override cover. Pull the cover /
override assembly from the body.
In addition, the 6-Port versions override bore can be fully
opened by removing the cap. Using a 5/32” hex wrench,
loosen and remove the four socket head cap screws and
remove the cap and o-ring face seal.
REASSEMBLY INSTRUCTIONS
Caution: To avoid damaging any incorporated valve
operator plunger assemblies, the override assembly shall
be reassembled to the body prior to any incorporated
valve operator reassembly.
To reassemble the manual override assembly:
Note: When reassembling to the body, the override
assembly must be in the “AUTO” position. Therefore the
shafts detent pin should be in the center positional slot of
the cover.
Note: Refer to the exploded view drawing.