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Form 6104 BCF10-R06
If the burner motor does not start, reset the motor overload
switch (if so equipped) and press the reset switch of the
burner primary control.
Vent the fuel unit as soon as the burner motor starts rotating.
To vent —
Attach a clear plastic tube to the air bleed valve (Figure
8 or 9 as applies, item p).
Place the end of the tube in a container to catch the oil.
Then loosen the fuel unit air vent valve.
Tighten the air vent valve after all air has been purged.
IF burner stops during venting —
The burner primary control will lockout if fl ame is not
established within its time limit. This is typically 15
seconds for R7184B primary controls, but may be less
for other fl ame supervisory controls.
The burner may lockout several times during the period
needed to purge all the air. Press the red reset button
for ½ second during the prepurge cycle to extend air
venting time.
IF burner stops after fl ame established —
Additional venting is probably required. Repeat the
air venting procedure.
7. Once fl ame is steady, proceed to Set air adjusing plate.
5.
6.
y
y
y
Set air adjusting plate (Figure 12)
Allow the burner to run until the appliance has warmed
suffi ciently.
Visually check the fl ame. The fl ame should not be dark
orange or smoky. If the fl ame appears to be smoking,
increase the amount of air by re-adjusting the damper
indicator to a higher number.
Once the appliance has warmed, the air setting can be
checked and adjusted.
Use combustion test instruments to adjust the burner.
a. Adjust the air until a trace of smoke is achieved with
CO
2
level as high as possible (lowest possible O
2
).
Example: 13.5% CO
2
(2.5% O
2
) with a trace of
smoke.
b. Increase the air to reduce CO
2
by 2 percentage points
at a zero smoke level. (Increase O
2
by 3 percentage
points at a zero smoke level.)
Example: Reduce CO
2
from 13.5% to 11.5%, with
zero smoke (or increase O
2
from 2.5% to 5.5%).
c. This procedure provides a margin of reserve air to ac-
commodate variable conditions.
Check the breech draft pressure against the appliance
manufacturer’s recommended setting (typically + 0.1”
W.C.).
If the breech pressure is higher or lower than recommend-
ed level, adjust the appliance breech damper to achieve
the specifi ed setting. Recheck the smoke and CO
2
levels.
Adjust burner air if necessary and tighten the air adjust-
ing plate screw securely.
1.
2.
3.
4.
5.
6.