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TROUBLESHOOTING
If the igniter does not light, check the following:
•
All fuel supply valves, including manual valves, are open.
•
Regulated gas pressure is available to the igniter.
•
Any valves in the gas lines are functioning properly.
•
Proper cooling/combustion air pressure is maintained at the igniter.
•
HEI spark rod is operating correctly and installed in the proper position, as shown in Figure 6. If
the HEI doesn't operate correctly, ensure that the spark tip is not grounded externally. (If the HEI
does not operate correctly, refer to the HEI bulletin SF-1.)
•
Ensure that necessary voltage is being received at low voltage terminals on the HEI power unit.
•
Both primary jet and gas transport tube orifice are free of foreign material. (See Maintenance
section.)
If the igniter lights but fails to stay on, check the following:
•
Fuel pressure is maintained as igniter starts.
•
Cooling/combustion air flow is set properly and is maintained as igniter starts.
•
Burner air flow is not blowing out the flame or not blowing the flame away from the detector
sighting.
•
Flame detector is functioning properly, if applicable.
•
Flame detector is sighted properly, if applicable.
MAINTENANCE
The SureFire™ components discussed below require maintenance. Proper care of these components
ensures long and reliable service. On a periodic basis, complete preventive maintenance activities.
CAUTION: Use protective clothing and gloves if furnace is in operation.
Guide Tube
Inspect the guide tube from the furnace side or remove internals from the mounting tube every 12
months or during a planned boiler outage.
NOTE: If heat distortion is observed, the cooling airflow to SureFire igniter can be impaired in
some way, or the igniter may be too far forward. Refer to the Commissioning section and make the
necessary adjustments to the cooling/combustion air flow and igniter position.
Orifice Tube
The following procedure is recommended maintenance steps for the orifice tube and dump tube ori-
fice.
1.
Close the manual valve to shut off the gas to the igniter, and then disconnect gas line from
igniter.
2.
Remove HEI spark rod electrical connections.
3.
Remove the guide tube clamp from the rear flange.
4.
Carefully remove the internals of the igniter from guide tube.
5.
Unscrew the gas transport tube and remove the orifice for cleaning.
6.
To prevent scoring the orifice, clean any debris or dirt that has collected on the orifice by using
a soft wire.
Summary of Contents for SureFire 20
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