AERCO BMK 1500-2000 - Manual (Page 86)

Benchmark 1500 - 2000 Boilers
CHAPTER 7 – MAINTENANCE
Page 86 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0097_0D
Ph.: 800-526-0288
GF-142
7.2 IGNITER-INJECTOR
The igniter-injector (part no. 66026) 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.
Figure 7-1: Benchmark 1500/2000 Burner Assembly (Removed from Boiler)
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. To
inspect/replace the Igniter:
Igniter-Injector Maintenance Procedures
1. Set the ON/OFF switch on the control panel, to the OFF position. Disconnect AC power
from the unit
2. Remove the top shroud from the unit by grasping the top handle and lifting straight up.
This will disengage the shroud from the four (4) pins in the side panels.
3. Disconnect the cable from the igniter-injector (Figure 7-1).
BLOWER
BLOWER
PLENUM
IGNITOR-
INJECTOR
ASSEMBLY
FLAME
DETECTOR
BURNER
PLENUM
FLANGE/
BURNER
TOP PLATE FLAME
OBSERVATION
PORT
AIR/FUEL
VALVE
BLOCKED
INLET
SWITCH
O
2
SENSOR
A/F VALVE
PLENUM