Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 3 – OPERATION
OMM-0078_0M
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
51
of
216
GF-128
Phone: 800-526-0288
09/11/2015
Start Sequence
– Continued
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-injector
relay is activated and provides ignition spark. Current to the
igniter or igniter-injector is monitored by the spark monitor (P/N
61034
).
(c)
The gas Safety Shut-Off Valve (SSOV) is energized (opened) allowing gas to
flow into the Air/Fuel Valve.
Figure 3-6. Air/Fuel Valve In Ignition Position
BLOWER
PROOF
SWITCH
OUTLET TO BLOWER
AIR/FUEL
VALVE
IGNITION
VALVE
POSITION
DIAL AT
25% to 35%
STEPPER
MOTOR
TO BLOWER
AIR IN