Aerco BENCHMARK 2500DF User Manual page 92

Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
removed from the boiler and indicates the location of the igniter-injector flame detector and other related
components.
BLOWER
BLOWER
PLENUM
O2 SENSOR
BURNER
PLATE
FLANGE
IGNITOR-
INJECTOR
ASSEMBLY
BURNER
Figure 7-1: Benchmark Burner Assembly (Removed from Boiler Enclosure)
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:
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).
4. Refer to the partial exploded view in Figure 7-2. Using a 7/16" open-end wrench,
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.
Page 92 of 234
05/21/2014
CHAPTER 7 – MAINTENANCE
Igniter-Injector Maintenance Procedures
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
BLOCKED
INLET
SWITCH
FLAME
DETECTOR
FLAME
OBSERVATION
PORT
A/F VALVE
PLENUM
AIR/FUEL
VALVE
OMM-0099_0A
GF-145