AERCO BMK 1000 - Manual (Page 51)

Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 3 – OPERATION
OMM-0082_0J AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 51 of 192
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Figure 3-3: SSOV Location
3. With all required safety device switches closed, a purge cycle will be initiated and the
following events will occur:
a) The Blower relay energizes and turns on the blower.
b) The Air/Fuel Valve rotates to the full-open purge position and closes purge position
switch. The dial on the Air/Fuel Valve (Figure 3-4) will read 100 to indicate that it is
full-open (100%).
c) The VALVE POSITION bargraph will show 100%.
Figure 3-4: Air/Fuel Valve In Purge Position
SSOV
GAS INLET
TO AIR/FUEL
VALVE
MANUAL
SHUT-OFF VALVE
STEPPER MOTOR
TO
BLOWER
AIR
INLET
100