How to Guide

CAD CELL TROUBLESHOOTING
Checkcad cell by reading resistance with ohmmeter while flame is present. See the table belowforcause and corrective
action to be taken for resistance that is read.
OHMMETER READING CAUSE
I
ACTION
Short circuit.
Cad cell and application are
operating correctly.
I
Check for oinched cad cell
leadwires.’
Recheck oil primary using a
2700 ohm resistor to jumper F-F
I
terminals; repeat steps
1 a-ld under “Burner Starts.
Over 1600 ohms, but not
infinite.
Infinite resistance.
Dirty cad cell.
Improper cad cell sighting.
Improper air adjustment.
Defective cad cell.
Open circuit
Flame is Established” on page 8.
Clean cad cell face and recheck.
Check flame sighting.
Adjust air band to get good reading.
Replace cad cell with Part No. 130367
and recheck.
Check for improper wiring, loose cad
cell in holder, or defective cad cell.
Replace defective cad cell with Part
No. 130367.
TRIP SAFETY SWITCH BEFORE OPERATING
BURNER MAINTENANCE (Tradeline model only)
TrIppIng the safety switch shutsdown the burner but
does not disconnect the power supply. Turn off
power at system switch or circuit breaker before
servicing the control system, burner motor, oil valve
or ignition to avoid electrical shock.
To trip the safety switch, move the safety switch lever
down until the red reset button pops out and the indicator
light comes on. See Fig. 5. Burner will not operate until
safety switch is reset by pushing in the red reset button.
PUSH LEVER DOWN TO
TRIP SAFElY SWITCH
WHEN SAFETY SWITCH TRIPS
- RESET BUTTON FOPS OUT
. INDICATOR LIGHT COMES ON
FIG. 5-TRIPPING THE SAFETY SWITCH.
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68-0111