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A. SHUT-DOWN CAUSED BY PILOT
OUTAGE, PRESSURE SWITCH OR
FLAME ROLL-OUT SAFETY
SHUT-OFF SWITCH
In the event of a shut-down caused by a pilot outage,
action of the pressure switch or flame roll-out safety
shut-off switch effecting a shut-down of the main
burners:
a. Refer to the Operating Instructions in Figure 7.3 to
properly turn off the gas to the boiler.
b. Turn off all electric power to the boiler.
c. Call a qualified heating service organization or local
gas company and have the cause of the shut-down
investigated and corrected.
d. Refer to Operating Instructions to
re-start boiler.
B. TROUBLESHOOTING GUIDES
Use Table 8.2 to assist in determining causes and
providing corrective actions to boiler problems. Refer
also to Figure 8.2 to troubleshoot the Intermittent
Ignition System Control. These guides must be used
only by qualified service technicians. These individuals
must follow all applicable codes and regulations in repair
of any boiler problems.
C. MEASURING SUCTION PRESSURE
Refer to Table 8.1 for fan suction pressure required to
energize control circuit. Measure fan suction pressure as
shown in Figure 8.1. Note that as boiler operates,
suction pressure will decrease. Measure after 15 minutes
of boiler operation.
TROUBLESHOOTING
8. TROUBLESHOOTING
Should overheating occur or the gas supply fail to
shut off, do not turn off or disconnect the electrical
supply to the pump. This may aggravate the problem
and increase the likelihood of boiler damage. Instead,
shut off the gas supply at a location external to the
appliance.
CAUTION
Do not use this appliance if any part has been under
water. Improper or dangerous operation may result.
Immediately call a qualified service technician to
inspect the boiler and to replace any part of the
control system and any gas control which has been
under water.
WARNING
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
CAUTION
When servicing or replacing items that communicate
with the boiler water, be certain that:
●●
There is no pressure on the boiler.
●●
The boiler is not hot.
●●
The power is off.
When servicing the gas valve or pilot, be certain that:
●●
The gas is off.
●●
The electricity is off.
DANGER
Table 8.1: Fan Suction Pressure
DE-03
DE-04
DE-05
DE-06
Boiler Model
Suction Pressure
1.78
1.56
1.56
1.35
0.44
0.39
0.39
0.34
(In. w.c) (kPa)