AERCO BMK 1.5 LN October 2012 - Manual (Page 81)

CHAPTER 7
MAINTENANCE
PR1: 10/18//12 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 Page 81 of 166
GF-120
OMM-0041 0E
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
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
Next, loosen and remove the igniter-injector from the burner plate using a 1" open-end 5.
wrench.
Check the igniter-injector for evidence of erosion or carbon build-up. If there is evidence 6.
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.
Prior to reinstalling the igniter-injector, a high temperature, conductive, anti-seize com- 7.
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, 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