Watts Aerco Innovation 800 User Manual page 47

Innovation Hot Water Hot Water Boiler User Manual
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
5. Upon completion of the purge cycle, the Control Box initiates an ignition cycle and the
following events occur:
The Air/Fuel Valve rotates to the low-fire ignition position and closes the Ignition
(a)
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.
The igniter-injector relay is activated and provides ignition spark. Current to the
(b)
igniter or igniter-injector is monitored by the spark monitor (P/N 61034).
The gas Safety Shut-Off Valve (SSOV) is energized (opened) allowing gas to
(c)
flow into the Air/Fuel Valve.
Figure 3-6. Air/Fuel Valve In Ignition Position
OMM-0120_0A
GF-128-I
CHAPTER 3 – OPERATION
Start Sequence – Continued
OUTLET TO BLOWER
Figure 3-5. Blower Proof Switch
IGNITION
VALVE
POSITION
DIAL AT
25% to 35%
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
AIR/FUEL
VALVE
AIR IN
TO BLOWER
Page 47 of 174
STEPPER
MOTOR
11/15/2016