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Dickinson Marine Alaska Manual

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www.dickinsonmarine.com ~ info@dickinsonmarine.com
Form#7.2-229 Issue#2
14
out of the valve. For this reason a manual shut-off will need to be teed in the
overflow line and closed when refilling tanks. CAUTION: After refilling,
you will need to burn off the fuel in the line before re-opening the shut-off
valve. Do not use a check valve. Remember to re-open the shut-off valve on
the overflow line.
Fuel Filter & Manual Shut-off’s
The fuel must be filtered before the fuel pump and before the oil metering
valve to prevent dirt and debris from plugging up the check valves in the
pump and the needle and seat in the valve. There also must be a manual
shut-off by the tank and also close to the heater as the pressure on the needle
in the valve will wear it out faster. We can supply a ¼” NPT fuel filter with
a shut-off for close to your heater for this purpose. (Part# 20-010) The 15
micron stone element in the filter (part#20-020) should be replaced every 1-
2 years.
Fuel Supply
The fuel can be supplied to your heater by either your main tank or a day
tank and fed with either a fuel pump or gravity depending on your install.
Gravity Feed
When using a gravity tank, there should be a minimum head of 12" (30.48
cm) above the fuel level marked on the side of the oil-metering valve to
operate correctly. The gravity feed tank must be vented and all fuel lines
must be as straight as possible to avoid air locks. Do NOT use a pressurized
tank.
The oil metering valve is rated to an incoming fuel pressure of 3 psi. If the
pressure exceeds 4 psi, a pressure regulator will be needed in the supply line.
(Part # 20-003) If installing a gravity tank larger then 30gal or higher than 8
feet above the valve of the heater, you will also need a pressure regulator.
Fuel Pump
When a low pressure fuel pump is used, a fuel line must be tee’d in as close
to the fuel tank as possible, not from the engine supply line or engine filter.
Use a check valve in the heater fuel line to stop the engine from pulling back
the fuel and starving the heater.
… 14 …


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