AERCO BMK 2.0 LN Dual Fuel Serial G-11-2402 and UP - Manual (Page 75)

CHAPTER 7: MAINTENANCE
PR2: 04/22/13 Page 75 of 160
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
IMPORTANT
Prior to removing the igniter-injector, note the position of the gas
injector tube relative to the burner plate and blower. This is
necessary to ensure that the igniter injector is reinstalled in the
proper orientation when it is reconnected to the staged ignition
assembly.
STAGED
IGNITION
ASSEMBLY
FLAME
DETECTOR IGNITOR-
INJECTOR
BURNER
PLATE
COMPRESSION
FITTING & ELBOW
FLAME
DETECTOR
GASKET
INDEXING
WASHERS
(QTY = 0-3
AS REQ’D)
Figure 7-2: Igniter-Injector & Flame Detector Mounting Details
5. Next, loosen and remove the igniter-injector from the burner plate using a 1" open-end
wrench.
6. Check the igniter-injector for evidence of erosion or carbon build-up. If there is evidence
of substantial erosion or carbon build-up, the igniter-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 igniter-injector, a high temperature, conductive, anti-seize com-
pound must be applied to the threads.
NOTE
If a replacement igniter-injector (part no. 58023) is being
installed, a compression nut containing a built-in ferrule
will be included with the replacement part. If needed,
three indexing washers are also included These washers
may be needed to properly position the gas injector tube
of the igniter-injector within the 120° angle range shown
in Figure 7-3.