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QB-180/300 Oil Burners Series 2 — Burner Manual
3
Fuel pumps and oil lines
General
All installations must comply with national or local
codes and ordinances.
Solenoid valve
Solenoid valve supplied in nozzle line is a non-delay
valve and provides instant oil supply shutoff to nozzle.
Vacuum gauge
Vacuum gauge may be installed in either of the ¼" inlet
ports. Vacuum is total of all pressure drops in system
from tank to pump inlet.
Oil pump pressure
To check operating pressure, use gauge port or nozzle
8
Oil line must be piped properly to
avoid risk of serious personal injury,
death or substantial property damage.
Follow these recommendations:
•
When installing oil lines, use
continuous runs of heavy-wall
copper tubing.
•
Be sure all connections are airtight.
Flared fittings are recommended.
Do not use compression fittings.
Do not use Teflon tape.
•
Use an oil filter of adequate size for
all installations. Install filter inside
building between tank shutoff valve
and burner. For easy servicing,
locate shutoff valve and filter near
burner.
•
Long or oversized inlet lines may
require the pump to operate dry
during initial bleeding period. In
such cases, assist priming by
injecting fuel oil into pump gearset.
•
Never exceed 3 psi pressure to inlet
side of pump. Pressure over 3 psi
may damage shaft seal and allow it
to leak oil.
port. Do not use easy flow air bleed valve. It contains
higher pressure than operating pressure.
Setting pump pressure with gauge in easy flow air bleed
valve will result in wrong operating pressure.
Average cutoff pressure is 120 psig. Check cutoff
pressure by installing pressure gauge in nozzle port of
fuel pump. Run burner for short time. Shut off burner.
Gauge shows cutoff pressure.
Figure 5
Fuel pump — Typical
Inlet ¼" npt (2 locations)
Return ¼" npt
Solenoid valve
Easy flow air bleed valve
Nozzle port 1/8" npt (read operating pressure)
Pressure gauge port 1/8" npt (read operating pressure)
Regulating pressure (behind inlet)
1/16" bypass plug — insert for
(use 5/32" allen wrench)
Part number 644-500-065/0200
two-pipe systems ONLY
06505
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