Benchmark 6000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 7 – MAINTENANCE
OMM-0086_0D
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
93
of
210
GF-133
Ph.: 800-526-0288
03/20/14
Pilot Burner Maintenance Procedure –
Continued
8. Check the Pilot Burner tip for evidence of erosion or carbon build-up. If there is evidence of
substantial erosion or carbon build-up, the Pilot Burner should be replaced. If carbon build-
up is present, clean the component using a wire brush. Check to ensure that the vanes are
not bent out of the proper position of a 20º incline. Repeated carbon build-up is an
indication that the combustion settings of the unit should be checked. Refer to Chapter 4
for combustion calibration procedures.
9. Prior to reinstalling the Pilot Burner, a high temperature, conductive, anti-seize compound
must be applied to the threads.
10. Reinstall the Pilot Burner on the Burner Plate. Ensure that the tapped hole for the elbow is
facing outward toward the edge of the Burner Plate to permit connection of the Pilot Burner
gas line. Torque to 170 - 180 in-lbs.
11. Reassemble the remaining components in the reverse order that they were removed.
12. Reconnect the ignition cable.
13. Close the right side door and front panel. Replace the top panel if the unit was serviced
from above.
7.3 MAIN FLAME DETECTOR
The Main Flame Detector (part no. 65136) is located on the Blower Flange near the top of the
unit (see Figures 7-1). The Main Flame Detector may be hot. Allow the unit to cool sufficiently
before removing the Main Flame Detector. Inspect or replace the Main Flame Detector as
follows:
Main Flame Detector Maintenance Procedure
1. Set the
control panel
ON/OFF
switch to the
OFF
position. Disconnect AC power from the
unit.
2. Remove the front panel from the unit by grasping the top handle and pulling straight out.
3. Disconnect the Main Flame Detector lead wire. Be careful not to yank the wire when it
pops off the Main Flame Detector.
4. Remove the Main Flame Detector from the Blower Flange.
5. Thoroughly inspect the Main Flame Detector. If eroded, the detector should be replaced.
Otherwise clean the detector with a fine emery cloth.
6. Apply a small amount of high temperature TFE-Based thread sealant and reinstall the Main
Flame Detector on the Blower Flange.
7. Reconnect the Main Flame Detector lead wire.
8. Replace the front panel on the unit.
