F10 - 10
TWO LINE (LIFT SYSTEM)
A) If a two line system is required, install the By-pass plug (4) provided. The by-pass
plug is installed in the return port (9) of the pump. A 2.5 mm hexagonal key provided
with the by pass plug is to be used to install the plug. DO NOT use an inch size
hexagonal key, damage to the by-pass plug may result. When operating on a two line
system, supply and return lines should be the same diameter and both should extend
to the same depth inside the fuel tank. Be sure there are no air leaks or blockages
in the piping system.
Any obstructions in the return line will cause failure of the pump shaft seal. Do not
exceed the pipe lengths indicated in the tables.
To install the by-pass plug:
1) Remove the return plug (9).
2) Install the by-pass plug (4) using the 2.5 mm hexagonal key.
B) Attach the two PIPE CONNECTORS (5) to the pump SUPPLY and pump RETURN
PORTS (6 and 9). Attach the required piping to these two pipe connectors using the
NPT/METRIC ADAPTERS that are supplied with the burner.
WARNING: Pipe dope or Teflon tape are NOT to be used on any direct oil con-
nection to the fuel pump.
WARNING: The height “P” in Pipe Length charts on page 9 and 10 should not
exceed 13 feet (4 m).
WARNING: The vacuum should not exceed 11.44 inches of mercury.
IMPORTANT: An external, appropriately listed and certified oil filter must be
placed in the fuel line between the fuel tank and the burner pump.
2 LINE (LIFT) SYSTEM - PIPE LENGTHS
H 3/8”OD 1/2”OD
FT M FT M FT M
0.0 0.0 115 35 330 100
1.5 0.5 100 30 330 100
3.0 1.0 80 25 330 100
5.0 1.5 65 20 295 90
6.5 2.0 50 15 230 70
9.5 3.0 25 8 100 30
11 3.5 20 6 65 20
NOTE: Do not exceed pipe lengths
indicated in chart.
HP
H
D6008
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