Part number 644-500-065/0200
9
QB-180/300 Oil Burners Series 2
— Burner Manual
Figure 6
One-pipe oil system, typical
One-pipe oil systems (
Figure 6
)
Use one-pipe oil piping only when:
•
the fuel is gravity fed — or —
•
the fuel must be lifted
no more than 8 feet
. See
Fig-
ure 6
. (If the fuel lift is greater than 8 feet use two-
pipe fuel piping —
Figure 7
on page 10.)
•
fuel suction line
vacuum is less than 6" Hg
for ei-
ther a single-stage or two-stage burner fuel pump.
Burner fuel pump bypass plug must not be used
with
one-pipe installations.
One-pipe installations must be absolutely air tight to
prevent leaks or loss of prime
. Bleed line and fuel
pump completely. Bleed for 15 seconds after last air
bubble is seen from easy flow air bleed valve to be cer-
tain lines are air free. When bleeding oil pumps on
burners equipped with lockout-type controls, you may
have to cycle the burner several times to complete purg-
ing.
Air vent
Fill pipe
Shutoff
valve
Oil
tank
Fuel pump
Filter
Maximum one-pipe
system lift =
8 feet
Inlet
06506
