Weil-McLain QB-180 Manual page 9

QB-180/300 Oil Burners Series 2 — Burner Manual
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
ure 6 . (If the fuel lift is greater than 8 feet use two-
pipe fuel piping —
Figure 7
• fuel suction line
vacuum is less than 6" Hg
ther a single-stage or two-stage burner fuel pump.
Burner fuel pump bypass plug must not be used
one-pipe installations.
One-pipe installations must be absolutely air tight to
prevent leaks or loss of prime
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.
Part number 644-500-065/0200
Figure 6
. See
Fig-
on page 10.)
for ei-
Fill pipe
with
. Bleed line and fuel
Shutoff
valve
06506
One-pipe oil system, typical
Air vent
Fuel pump
Maximum one-pipe
system lift = 8 feet
Oil
tank
Inlet
Filter
9