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IGNITER-INJECTOR MAINTENANCE PROCEDURES – Continued
If a replacement igniter-injector (part no. 66026) 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.
IGNITER-
INJECTOR
ANGLE OF
120°
GAS INJECTOR
TUBE
O2 SENSOR
Figure 7-3: Igniter-Injector Orientation (Viewed Looking Down from Above)
10.
Reinstall the igniter-injector in the burner plate. Torque to 170 - 180 in-lbs. DO NOT over
tighten.
11.
Connect the staged ignition assembly to the gas injector tube of the igniter-injector by
securing the compression nut to the elbow of the staged ignition assembly.
12.
Reconnect the igniter-injector cable.
13.
Reinstall the shroud on the unit.
7.3 FLAME DETECTOR
The flame detector (part no. 66020) is located on the burner plate at the top of the unit (see
Figures 7-1 and 7-2). The flame detector may be hot. Allow the unit to cool sufficiently before
removing the flame detector. Inspect or replace the flame detector as follows:
1.
Set the control panel ON/OFF switch 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.
Page 86 of 184
Benchmark 1500 - 2000 Boilers
CHAPTER 7 – MAINTENANCE
NOTE
Flame Detector Maintenance
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
BLOWER PLENUM
FLAME
OBSERVATION
PORT
FLAME
ROD
OMM-0097_0C
GF-142
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