Aerco BENCHMARK 2500DF User Manual page 48

Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
c. The VALVE POSITION bargraph will show 100%.
TO BLOWER
AIR IN
4. Next, the blower proof switch on the Air/Fuel Valve (Figure 3-5) closes. The display will
show Purging and indicate the elapsed time of the purge cycle in seconds.
BLOWER
PROOF
SWITCH
BLOCKED
INLET
SWITCH
Page 48 of 234
05/21/2014
CHAPTER 3 – OPERATION
STEPPER
MOTOR
PURGE
VALVE POSITION
DIAL AT 100%
Figure 3-4: Air/Fuel Valve In Purge Position
Figure 3-5: Blower Proof Switch
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
AIR/FUEL VALVE
OUTLET TO BLOWER
AIR/FUEL VALVE
INLET FROM GAS
TRAIN
OMM-0099_0A
GF-145