18
Start-Up And Adjustment Of Oil Burner
NOTE: Bacharach or Dwyer test kits include these
instruments.
(See oil burner instructions for nozzle and electrode setting)
1.
Verify oil burner nozzle is tight in adapter. Burner
mounting bolts should be tight.
2.
Check electrode setting, may have been jarred out of
position during transportation.
3.
Lubricate burner motor if necessary.
4.
Set room thermostat to call for heat, or jump
thermostat contacts on boiler control.
5.
Open all oil line valves.
6.
Turn service switch on. Burner will start.
7.
On one pipe fuel systems only, bleed pump as soon as
burner starts. Allow oil to run until all traces of air in
suction line disappear.
8.
Turn “OFF” burner and install pressure gauge port on
pump.
9.
Start burner and check oil pressure for 140 psi adjust if
necessary.
Table 7 Oil Burner Settings
Boiler
Model No.
Head
Type
Static
Disc
Air Band
Settings
Air Shutter
Settings
Nozzle Furnished
Pump Pressure
(psi)
0BC3095
F3
2¾
U
0
6
Delevan 0.85x 80°B
140
0BC4100
F3
2¾
U
0
7
Delevan 0.85x 80°B
140
0BC4115
F6
2¾
U
0
6
Delevan 1.00x 80°B
140
NOTES:
Information in above table uses Beckett model AFG burner for both model numbers OBC-3 and OBC-4.
OBC4115 is rerated boiler which requires rerate kit.
Check safety control circuit
after burner adjustments
have been made for satisfactory performance.
A. High limit control: remove cover and note
temperature setting.
See Figure 20, Page 17
. With
burner operating, decrease setting to minimum
point. When boiler water temperature exceeds set
point, high limit switch will open, shutting off power
to oil burner. Return setting to desired high limit
point. Burner should start.
B. Verify Primary Control and Flame Sensor -
• Flame Failure
- simulate by shutting off oil supply
with hand valve while burner is on. Sixty seconds after
fl
ameout, safety switch locks out, ignition stops, motor
stops and oil valve - when used - closes. To restart,
open oil supply valve and reset safety switch.
• Ignition Failure
- With burner off, close oil supply
valve and run through start-up procedure. Safety
switch should lock out as in
fl
ame failure.
• Power Failure
- Turn off main power supply switch
while burner is operating. When burner stops, restore
power and burner should start. If operation is not as
described as above, check wiring and controls.
OPERATING INSTRUCTIONS
Burner Operation Instructions
• Use provided ¼" diameter slot in inspection cover plate
to take draft readings in combustion chamber.
See
Figure 20, Page 17 .
• Drill ¼" diameter hole in
fl
ue pipe between boiler and
barometric damper (if used) to take draft, CO
2
, smoke
and temperature readings. Plug hole when done.
• Adjust air shutter on oil burner to obtain “trace” of
smoke. Measure CO
2
at this point.
• Increase air adjustment to lower CO
2
approximately one
percent.
• Verify minimum negative .02 w.c., (water column),
“over
fi
re” draft and zero smoke.
• If -.02 w.c. “over
fi
re” draft can not be maintained,
changes and/or modi
fi
cations may be required in venting
or chimney.
• See table below as guideline for initial start-up. Make
fi
nal adjustments using combustion instruments.
WARNING
Boiler and venting installations shall be performed
by a quali
fi
ed expert and in accordance with the
appropriate manual. Installing or venting boiler
or other gas appliance with improper methods or
materials may result in serious injury or death due
to
fi
re or to asphyxiation from poisonous gases such
as carbon monoxide with is odorless and invisible.
!
