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Benchmark 5000-6000 Boiler Installation & Startup Manual
SECTION 3: START SEQUENCE
Start Sequence
6. Once the spark cleaning period is finished and ignition relay 1 (R1) closes, power is
supplied to the SSOVs and the following events occur in 7 seconds:
a. The SSOVs open allowing gas to flow into the Air/Fuel Valve.
b. The Main Burner ignites.
c. Main Burner flame is sensed by the C-More Controller.
d. The C-More Controller turns off power to the ignition transformer and Pilot solenoid
valve.
e. Relay 2 (R2) remains energized via the POC Normally Open (N.O.) contact of the
upstream SSOV actuator.
7. A maximum of 14 seconds are allowed for the entire ignition sequence, from applying
power to the ignition transformer through actual Burner flame establishment. The igniter
relay will be turned off one second after flame is detected.
8. 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.
9. With the unit firing properly, it will be controlled by the temperature control circuitry. The
boiler's VALVE POSITION will be continuously displayed on the C-More Controller's front
panel bargraph.
10. Once the demand for heat has been satisfied, the C-More Controller will turn off the SSOV
gas valves, the blower relay will be deactivated, the Air/Fuel Valve will be closed and
STANDBY will be displayed.
OMM-0123_E • GF-207 • 12/17/2019
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 40 of 95
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