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Benchmark 750 – 1000 Boiler User Manual - INTERNATIONAL
CHAPTER 7 – MAINTENANCE
Page
92
of
170
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0119_0A
11/03/2016
Ph.: 800-526-0288
GF-130-I
Burner Assembly Inspection and Maintenance Procedures
–
Continued
16.
Remove the burner assembly from burner flange by pulling straight up.
17.
Remove and replace the burner gasket.
NOTE
During reassembly, apply a light coating of high-temperature, anti-
seize lubricant to the threads of the igniter-injector and grounding
screw. Also, ensure that the igniter-injector is properly positioned
as indicated in Figure 7-3.
Torque the igniter-injector to 170 -
180 in-lbs.
(19.2 – 20.3 Nm)
.
18.
Beginning with the burner assembly removed in step 16, reinstall all the components in
the reverse order that they were removed. When reinstalling the burner flange (removed
in step 15), tighten the 3/8-16 nuts using a typical torque pattern. For example, loosely
tighten one nut, then loosely tighten a second nut on the opposite side, a third at 90
degrees to the first two, and a fourth opposite the third, and then repeat this pattern with
the remaining four nuts. Repeat the entire pattern a second time to partially tighten all
eight nuts, and then repeat a third time until all eight nuts are
fully torqued to
30 ft. lbs.
(40.7 Nm)
.
19.
Ensure that the igniter-injector and flame detector cutouts in the burner plate are properly
aligned with the heat exchanger top flange.