CLEAN BURN CB-500 series, Operator'S Manual

Page: 92 / 122

Operator's Manual: Models CB-1500 & CB-2500 (230 V / 50 Hz)
10-4
PROBLEM POSSIBLE CAUSE POSSIBLE ACTION(S)
Burner ignites, but will not stay running
and Burner shuts off on reset within 15
seconds.
1. There is a fuel delivery problem.
2. The cad cell is dirty.
3.
Cad cell wires are loose.
4. Cad cell / cad cell wires are
damaged.
5. The primary control is not
receiving the proper
µA
signal
from the cad cell.
1. Follow the procedures listed in the
next problem.
2. Clean and check the condition of
the cad cell and cad cell wires.
3. Check that the blue and black
wires are connected properly into
the primary base (terminals 11
and 12)
4. Replace the cad cell and cad cell
wires. If the cad cell is heat
damaged: (a) Clean your
furnace, including the combustion
chamber, flues and stack. Refer
to instructions in Section 9. (b)
Check for backdraft caused by
exhaust fans in your building.
Follow instructions in Section 8.
5. The photo current is measured
with a direct current ammeter in
series with the photo unit (+ pole
on terminal 12). With a flame,
cad cell current must be between
50
µA
and 210
µA
at 240V.
With no flame, the measured
photo current must be maximum
5
µA
at 230V.
Burner ignites and runs properly, but the
burner shuts off on reset periodically
(e.g. the burner goes off on reset during
the night and requires resetting in the
morning).
1. There is air in the suction oil line
due to leaks at the fittings
2.
There is air trapped in a high point
in the pressure oil line.
1. Follow the procedures in Section
5 to vacuum test the pump. Re-
install and properly seal the
suction line fittings to eliminate air
leaks.
2. Follow instructions in Section 4 to
bleed the air out of the pressure
oil line.