SECTION J:
FUELING
WARNING:
Use only clear Paraffin. NEVER USE GASOLINE.
Use of gasoline can lead to uncontrollable flames resulting in destructive fire.
Laser 73 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 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 40 cm 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 2.5 m above floor
surface upon which heater rests.
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Fuel tank should be located at least 2 m away from all heat sources.
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5/16” 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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Use of fuel filter in fuel line adjacent to tank is recommended, shut-off valves should also be
installed on the fuel line and connected to the tank as shown below.
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 recommended.
1. Be sure all external tanks have an operating vent.
2. The use of a water trap filter is recommended. A model with a drain plug or petcock is preferred.
3. 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 2.5 m, a fuel
pressure reducing valve, preset at 2.5 psi, is required.
Laser 73
3/8in.OD copper tubing
Valve
(recommended)
Shut-off valve
Fuel filter
Tank vent
Outdoor fuel tank
Loop
Fire safety valve
(recommended)
2.5 m maximum
40 cm minimum
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Laser 73 (E) Zibro 06.9.6 10:32 AM Page 25