AERCO BMK 1.5 LN October 2012 - Manual (Page 80)

CHAPTER 7
MAINTENANCE
Page 80 of 166 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 PR1:10/18/12
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
GF-120
OMM-0041 0E
7.2 IGNITER-INJECTOR
The igniter-injector (part no. 58023) is located on the burner plate at the top of the boiler. In
addition to providing the ignition spark required to light the burner, the igniter-injector also
contains a gas injector tube which connects to the staged ignition assembly. Figure 7-1 shows
the complete burner assembly removed from the boiler and indicates the location of the igniter-
injector flame detector and other related components.
The igniter-injector may be hot, therefore, care should be exercised to avoid burns. It is easier to
remove the igniter-injector from the unit after the unit has cooled to room temperature.
AIR/FUEL
VALVE
STAGED
IGNITION
ASSEMBLY
FLAME
DETECTOR
IGNITOR-
INJECTOR
BLOWER
BURNER
PLATE
BURNER
Figure 7-1: Benchmark 1.5LN Burner Assembly (Shown Removed from Boiler)
To inspect/replace the Igniter:
Set the ON/OFF switch on the control panel, to the OFF position. Disconnect AC power 1.
from the unit
Remove the side and top panels from the unit. 2.
Disconnect the cable from the igniter-injector (Figure 7-1). 3.
Refer to the partial exploded view in Figure 7-2. Using a 7/16” open-end wrench, 4.
disconnect the compression nut securing the gas injector tube of the igniter-injector to
the elbow of the staged ignition assembly. Disconnect the staged ignition assembly from
the igniter-injector.