Watts Benchmark Aerco OMM-0122 Installation And Start-Up Manual page 96

Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 5 – SAFETY DEVICE TESTING
Purge Switch Open During Purge Check Instructions
Ignition Position
Switch
AIR/FUEL VALVE
SWITCH WIRING
BREAKOUT
Purge Position
Switch
Figure 5-11a: Air/Fuel Purge and Ignition Locations– BMK 1500 – 3000
AIR IN
Figure 5-11b: Air/Fuel Purge and Ignition Locations– BMK 750/1000
OMM-0121_D • GF-205 • 5/9/2019
TO BLOWER
AIR IN
Purge Position Switch
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
VALVE
POSITION DIAL
Ignition Position Switch
TO BLOWER
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