FUEL SYSTEM OPTIONS
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Large Capacity External Tank
Tank must be purchased separately and installed by a qualified fuel supply technician.
EXTERNAL TANK INSTALLATION
NOTE:
External tank installation must comply with National Fire Protection Association Code NFPA 31 or
locally applicable codes. Check with local building officials.
The following instructions should be followed for installation of a large capacity, gravity-fed external fuel
tank.
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Installation height of tank's fuel outlet should be at least 16 in. above floor surface upon which
heater rests.
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To avoid excess fuel pressure to heater, top of fuel tank should be no more than 8-1/2 ft. above
floor surface upon which heater rests.
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Fuel tank should be located at least 6 ft. away from all heat sources.
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3/8” OD copper tubing should be used for fuel line.
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To prevent air locks in fuel line, fuel line should be smooth with no U-shaped or sharp bends.
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Install a UL listed fuel filter at the fuel tank outlet
(it is highly recommended to use an in-line small
mesh size filter with water block, e.g. 10 micro filter)
.
Shout-off valves should also be installed on
the fuel line and connected the tank as illustrated on page 30.
IMPORTANT: WHEN OPERATING THE Oil Miser 23 HEATER WITH NO.2 FUEL OIL. IT IS IMPORTANT TO
USE A IN-LINE SMALL MESH SIZE FILTER. (e.g. 10 Micron Filter) LOCATED AS ILLUSTRATED
ON PAGE 30.
NOTE:
An additional shut-off valve installed next to the exterior wall will minimize fuel to be drained
should heater have to be disconnected. If the valve is on interior side, a fusible link type is recom-
mended.
1. Be sure all external tanks have an operating vent.
2. Be sure to observe the maximum and minimum tank heights as specified.
NOTE:
If the maximum height from the top of the fuel tank to the bottom of the heater exceeds 8-1/2 ft., a
fuel pressure reducing valve, preset at 2.5 psi, is required.
Pressure Reducing Valve Part#10005099 has 3/8 in. (N.P.T.) inlet and outlet female openings to
accept the fuel line fittings.
NOTE:
Fusible Link Valve (#10005597)
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It is most important that the valve, depending on its use, be fully
opened or fully closed.
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The top nut on the valve (below the turn handle) is sealed and should
never be tightened or removed.
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When installing fuel lines to the valve, be sure to check for fuel leak-
age.
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A LEAKING VALVE MUST ALWAYS BE REPLACED.
29
SECTION J:
FUELING
Use ASTM D3699 1-K Kerosene, ASTM D396 SLow Sulfur No.1 Fuel Oil, or ASTM D975 Ultra Low Sulfur Diasel (ULSD).
NEVER USE GASOLINE. Use of gasoline can lead to uncontrollable flames resulting in destructive fire.
WARNING:
Oil Miser 23 (E) 09.1.23 11:16 AM ページ 29
