Watts Aerco Innovation 800 User Manual page 46

Innovation Hot Water Hot Water Boiler User Manual
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.
GAS INLET
MANUAL SHUTOFF
VALVE
Figure 3-3. SSOV Location (Gas Train P/N 22282 shown)
3. With all required safety device switches closed, a purge cycle will be initiated and the
following events will occur:
The Blower relay energizes and turns on blower.
(a)
The Air/Fuel Valve rotates to the full-open purge position and closes purge
(b)
position switch. The dial on the Air/Fuel Valve (Figure 3-4) will read 100 to
indicate that it is full-open (100%).
The VALVE POSITION bargraph will show 100%.
(c)
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11/15/2016
CHAPTER 3 – OPERATION
Start Sequence
PURGE
VALVE
POSITION
DIAL AT 100%
Figure 3-4. Air/Fuel Valve In Purge Position
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
SSOV
AIR IN
TO BLOWER
OMM-0120_0A
STEPPER
MOTOR
GF-128-I