Benchmark 2500 - 3000 Boilers
CHAPTER 3 – OPERATION
OMM-0094_0E
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
49
of
204
GF-137
Ph.: 800-526-0288
03/20/2014
(b) The “Spark Cycle Time” item in the Factory menu can be set to either 0 Sec, 2 Sec
or 7 Sec to define the duration of the Spark Element Cleaning Cycle. This cycle
turns on the spark transformer to produce a spark (with no gas flowing) to clean the
spark element of moisture or carbon buildup.
For the duration of this cycle, the C-More will display the “CLEANING IGNITER”
message.
(c) Following the Spark Element Cleaning Cycle, power is applied to the Gas Safety
Shut-off Valve (SSOV) and the C-More displays the “PRE IGNITION” message.
When the SSOV indicates the Gas Valve is OPEN (POC), the C-More displays the
“IGNITION TRIAL” message.
(d) If no spark is present 3 seconds into the IGNITION TRIAL, the C-More will abort the
Ignition Cycle and shut down the boiler. Refer to
Chapter 8: Troubleshooting
for
guidance if this occurs.
Figure 3-6: Air/Fuel Valve In Ignition Position
6.
Up to 4 seconds will be allowed for ignition to be detected. The igniter relay will be
turned off one second after flame is detected.
7.
After 2 seconds of continuous flame,
Flame Proven
will be displayed and the flame
strength will be indicated. After 5 seconds, the current date and time will be displayed
in place of the flame strength.
8.
With the unit firing properly, it will be controlled by the temperature controller circuitry.
The boiler’s
VALVE POSITION
will be continuously displayed on the front panel
bargraph.
Once the demand for heat has been satisfied, the Control Box will turn off the SSOV gas valve.
The blower relay will be deactivated and the Air/Fuel Valve will be closed.
Standby
will be
displayed.
TO BLOWER
AIR IN
IGNITION
VALVE POSITION
DIAL AT
25% to 35%
STEPPER
MOTOR
