AERCO BMK 6000 Dual Fuel - Manual (Page 52)

Benchmark 6000 DF Installation, Operation & Maintenance Manual
CHAPTER 3 – OPERATION
Page 52 of 219 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0096_0B
03/21/2014
Ph.: 800-526-0288
GF-141
c) The VALVE POSITION bargraph will show 100%.
Figure 3-4: Air/Fuel Valve In Purge Position
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.
Figure 3-5: Blower Proof Switch
NOTE
A Function Timing Chart for the Benchmark 6000 Proved Pilot Control
System is provided in Figure 3-7, below.
BLOCKED
INLET
SWITCH
BLOWER
PROOF
SWITCH
AIR/FUEL
VALVE TO
BLOWER
AIR/FUEL VALVE
STEPPER
MOTOR
TO BLOWER
100
AIR IN