Watts AERCO Benchmark OMM-0121 Operation And Maintenance Manual page 42

Benchmark 750-3000 Boiler Operation & Maintenance Manual
SECTION 4 – MAINTENANCE
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 Procedure Instructions
1. Set the ON/OFF switch on the C-More Controller 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 (see Figure 4-1a – Figure 4-1c, above).
4. Referring to Figure 4-2a – Figure 4-2c, below, use a 7/16" open-end wrench to 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.
FLAME
DETECTOR
& GASKET
BURNER
PLATE
LEAN O SENSOR
2
& WASHER
Figure 4-2a: BMK 750/1000 Igniter-Injector & Flame Detector Mounting Details
STAGED
IGNITION
SOLENOID
INJECTOR-IGNITER
ASSY WITH INDEXING
(CLOCKING) WASHERS
(0-3 as needed)
LEAN O2 SENSOR
& WASHER
BURNER PLATE
FLANGE
Figure 4-2b: BMK 1500/2000 Igniter-Injector & Flame Detector Mounting Details
OMM-0122_D • GF-206 • 5/9/2019
COMPRESSION
FITTING & ELBOW
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
STAGED
IGNITION
SOLENOID
IGNITER-INJECTOR
INDEXING
(CLOCKING)
WASHERS
(0-3 as required)
BLOWER
PLENUM
FLAME
OBSERVATION
PORT
FLAME
DETECTOR &
GASKET
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