AERCO BMK 3.0 LN Nat. Gas June 2010 - Manual (Page 54)

MAINTENANCE
5. Next, loosen and remove the ignitor-injector
from the burner housing using a 1" open-end
wrench.
6. Check the ignitor-injector for evidence of
erosion or carbon build-up. If there is
evidence of substantial erosion or carbon
build-up, the ignitor-injector should be
replaced. If carbon build-up is present, clean
the component using fine emery cloth.
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.
7. Prior to reinstalling the ignitor-injector, a high
temperature, conductive, anti-seize com-
pound must be applied to the threads.
NOTE
If a replacement ignitor-injector (part no.
58023) is being installed, a compression
nut containing a built-in ferrule will be
included with the replacement part. If
needed, 3 indexing washers are also
included. These washers may be needed
to properly position the gas injector tube
of the ignitor-injector within the 120° angle
shown in Figure 7-2.
120
120
DEG. GAS INJECTOR TUBE
MUST BE WITHIN
THIS RANGE
IGNITOR-
INJECTOR
BURNER
HOUSING
HOUSING
CENTERLINE
Fgurei 7-2
Burner Assembly – Top View
8. Reinstall the ignitor-injector in the burner
housing and torque to 80 to 90 in-lbs.
However, if the burner housing was replaced
just prior to replacing the ignitor-injector,
torque to 180 in-lbs, then loosen and re-
tighten to 80 to 90 in-lbs.
9. Connect the staged ignition assembly to the
gas injector tube of the ignitor-injector by
securing the compression nut to the elbow of
the staged ignition assembly.
10. Reconnect the ignitor-injector cable.
11. Reinstall the side and top panels on the unit.
Table 7-1 - Maintenance Schedule
PARAGRAPH ITEM 6 Mos. 12 Mos. 24 Mos.
Labor
Time
7.2
Ignitor-Injector
(58023)
*Inspect Inspect Replace 15 mins.
7.3
Flame Detector
(66006)
*Inspect Inspect Replace 15 mins.
7.4
Combustion
Calibration
*Check Check 1 hr.
7.5
Testing of
Safety Devices
See CSD-1
Chart in
Appendix I
20 mins.
7.6 Burner Inspect 2 hrs.
7.7
Condensate
Drain Traps
*Inspect
Inspect &
Clean
1 hr.
* Only performed after initial 6 month period after initial startup.
7-2