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OIL TANK AND PIPING
OIL TANK AND PIPING should be installed in accordance with the National Board of Fire
Underwriters and local regulations. Oil storage tank, vent, fill pipe and caps should be as
prescribed by local codes. In no case should the vent pipe be smaller than 1-1/4" I.P.S. The
fill pipe should not be less than 2" I.P.S.
The suction line from the tank to the burner should be one continuous piece of tubing
to prevent air entering the line. The suction line, must be 3/8" O.D. copper tubing for runs
of 50 feet or less, and 1/2" O.D. for longer runs. An oil return line, same size as the suction
line, must be used on any installation where the bottom of the tank is below the fuel unit of
the burner. Oil lines should be buried or otherwise protected from mechanical injury. Flare
fittings on all oil lines are required. Compression fittings on the suction line often allow air
to be drawn into the fuel pump, making it difficult to maintain oil pressure at the nozzle. Do
not run overhead fuel lines from tank to oil burner.
Fuel pump connections and by-pass should be made according to instructions attached
to the fuel pump. If tank is more than 20' from the boiler, a two stage fuel unit should be
installed in place of the single stage pump supplied as standard equipment with the burner.
Make certain the rotation and speed are the same and the pump is suitable for the burner
horsepower rating.
An oil line filter and shut-off valve should be installed in the suction line. Shut-off valves
should be installed in both the suction and return lines at the burner for convenience in
servicing burner. Allow extra tubing at burner so burner may be removed from boiler for
cleaning without disconnecting tubing. (See figures 13 &14, below). An optional flexible oil
line is available.
FIGURE 13
FIGURE 14
TYPICAL INSTALLATION TWO
PIPE OIL SYSTEM
TYPICAL INSTALLATION SINGLE
PIPE OIL SYSTEM
