![background image](http://html2.mh-extra.com/html/watts/aerco-bmk-750/aerco-bmk-750_operation-and-service-manual_3787105094.webp)
Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 5
– SAFETY DEVICE TESTING
OMM-0145_A99
• GF-218 • 9/18/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
94
of
157
Purge Switch Open During Purge Check Instructions
Figure 5-11a: Air/Fuel Purge and Ignition Locations
– BMK750/1000
Figure 5-11b: Air/Fuel Purge and Ignition Locations
– BMK1500 – 4000
TO BLOWER
Purge Position
Switch
AIR IN
VALVE
POSITION DIAL
AIR/FUEL VALVE
SWITCH WIRING
BREAKOUT
172
171
170
169
Ignition Position
Switch
Ignition Position Switch
Purge Position Switch
AIR IN
TO BLOWER