AERCO BMK 6000 Dual Fuel - Manual (Page 51)

Benchmark 6000 DF Installation, Operation & Maintenance Manual
CHAPTER 3 – OPERATION
OMM-0096_0B AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 51 of 219
GF-141
Ph.: 800-526-0288
03/21/2014
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 will read 100 (Figure 3-4) to indicate that it is
full-open (100%).
TO AIR/FUEL
VALVE
MANUAL
SHUT-OFF
DOWNSTREAM
SSOV with POC
SWITCH
PROPANE
LOW GAS
PRESSURE
SWITCH
(5.8” W.C.)
GAS
INLETS
NATURAL GAS
HIGH GAS
PRESSURE
SWITCH
(10.5” W.C.)
NATURAL GAS
LOW GAS
PRESSURE
SWITCH
(8.5” W.C.)
UPSTREAM
SSOV with
POC & AUX
SWITCHES
DOWNSTREAM
SSOV with POC
SWITCH
PROPANE
NATURAL GAS
UPSTREAM
SSOV with
POC & AUX
SWITCHES