AERCO C-More Controls Manual June 2010 - Manual (Page 74)

C-More Controller for Benchmark, Innovation & KC
USER MANUAL
Page 74 of 162 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 04/22/14
GF-112 Phone: 800-526-0288 OMM-0032_0E
B
U
R
N
E
R
B
L
O
W
E
R
DIAL
(DETAIL “A”)
STEPPER
MOTOR
DETAIL "A"
100
Figure 5-3: KC1000 Air/Fuel Valve In Purge Position
4. Next, the blower proof switch (Figure 5-4) closes and the display will show Purging and
indicate the elapsed time of the purge cycle in seconds. The normal (default) time for
the purge cycle is 7 seconds.
154
155
AIR/FUEL VALVE
BLOWER PROOF
SWITCH
TO FRAME
HARNESS
Figure 5-4; 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 5-5) 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. Up to 7 seconds will be allowed for ignition to be
detected. The igniter relay will be turned off one second after flame is detected.