16
Set room thermostat to call for heat, or jump
D.
thermostat contacts on the boiler control.
Open all oil line valves.
E.
Turn service switch on. Burner should start.
F.
On one pipe fuel systems only, bleed pump as soon
G.
as burner starts. Allow oil to run until all traces of
air in the suction line disappear.
Turn “OFF” burner and install pressure gauge port
h.
on pump.
Start burner again and check oil pressure for 140 lbs.
I.
Adjust if necessary.
Instructions To Obtain Proper Operation Of Boiler-
Burner Unit.
A ¼" diameter slot is provided in the
inspection cover plate to take draft readings in the
combustion chamber. (Figure #17)
A ¼" diameter hole
will be required in the flue pipe between the boiler and
barometric damper (if used) to take draft, CO
2
, smoke
and temperature readings. Adjust air shutter on oil burner
to obtain a “trace” of smoke. Measure CO
2
at this point.
Increase air adjustment to lower CO
2
approximately one
percent. Check to insure minimum negative .02 w.c.,
(water column), “overfire” draft and zero smoke. If -.02
w.c. “overfire” draft can not be maintained, changes and/or
modifications may be required in venting or chimney.
The following table IS provided as a guideline for
initial start-up. Final adjustments MUST be made using
combustion instruments as previously mentioned.
Boiler
Model
No.
End Cone Static
Disc
Air Band
Settings
Air Shutter
Settings
Nozzle Furnished
BC3D
F-0
2¾
0
8
.65x80B
BC3
F-3
2¾
1
8
.85X80B
BC4D
F-3
2¾
1
8
.85X80B
BC4
F-6
2¾
3
10
1.25X80B
NOTES:
Information in above table uses Beckett model AF burner for both model numbers BC-3 and BC-4.
BC3D and BC4D are derated boilers which require derate kits; part numbers 5612501 for BC3D
and 5612202 for BC4D.
IMPORTANT: Check safety control circuit after burner
adjustments have been made for satisfactory performance.
high limit control: remove cover and note
A.
temperature setting. See Figure #17. With the
burner operating, decrease this setting to the
minimum point. When boiler water temperature
exceeds this set point, the high limit switch will
open, shutting off the power to the oil burner.
Return setting to desired high limit point. Burner
should re-start.
!
WARNING
WATER WILL BE BOILING HOT.
Primary Control and Flame Sensor -
B.
To Check:
Flame Failure
•
- simulate by shutting off oil supply
with hand valve while burner is on. Sixty seconds after
flameout, the 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 sup-
ply valve and run through start-up procedure, The
safety switch should lock out as in flame 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
