Chapter 3
Innovation Series Water Heaters
GF-128
Operation
USER MANUAL
OMM-0079_0B
07/21/11 AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
•
Ph: 800-526-0288
Page
37
of
200
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
5. Upon completion of the purge cycle, the Control Box initiates an ignition cycle and the following
events occur:
(a)
The Air/Fuel Valve rotates to the low-fire ignition position and closes the ignition switch. The dial
on the Air/Fuel Valve (Figure 3-6) will read between 25 and 35 to indicate that the valve is in the
low-fire position.
(b)
The igniter relay is activated and provides ignition spark.
(c)
The gas Safety Shut-Off Valve (SSOV) is energized (opened) allowing gas to flow into the
Air/Fuel Valve.
