AERCO Innovation (G-14-2265 and above) - Manual (Page 50)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 3 – OPERATION
Page 50 of
206 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
OMM-0078_0L
PRI: 11/25/2014
Phone: 800-526-0288
GF-128
Start Sequence
1. The DEMAND LED status indicator will light.
2. The unit checks to ensure that the Proof of Closure (POC) switch in the downstream
Safety Shut-Off Valve (SSOV) is closed. See Figure 3-3 for SSOV location.
Figure 3-3. SSOV Location (INN1060 Gas Train shown)
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 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
STEPPER
MOTOR
TO BLOWER
AIR IN
PURGE
VALVE
POSITION
DIAL AT 100%
GAS INLET
MANUAL
SHUTOFF
VALVE
SSOV