AERCO BMK 1.5 LN July 2011 - Manual (Page 73)

CHAPTER 7: MAINTENANCE
PR2: 05/09/12 Page 73 of 152
Benchmark 1.5LN Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0D
GF-120
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
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 compound
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, 3
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.
120
IGNITOR-
INJECTOR
GAS
INJECTOR
TUBE
BLOWER
BURNER
PLATE
Figure 7-3: Igniter-Injector Orientation