Watts AERCO Benchmark OMM-0136 - Page 77

Benchmark Platinum-Edge [II]: Operation-Service Manual
SECTION 5 – SAFETY DEVICE TESTING
OMM-0137_E • GF-211 • 12/13/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 77 of 153
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