Watts AERCO Benchmark BMK5000 Operation And Service Manual page 21

Benchmark Platinum-Edge [ii]: Operation-Service Manual
SECTION 3 - START SEQUENCE
Start Sequence
TO BLOWER
AIR IN
7. Up to 4 seconds are allowed for ignition to be detected. The ignition circuit is turned off
one second after flame is detected.
8. After 2 seconds of continuous flame, the flame strength is indicated. After 5 seconds, the
Unit Status screen appears.
9. With the unit firing properly, it will be controlled by the temperature control circuitry. The
boiler's fire rate or valve position (depending on which was chosen in Section 6.2.2: Front
Panel Configuration of the Edge Controller Manual) will continuously display on the
Controller's bar graph.
10. Once the demand for heat has been satisfied, the Edge Controller will turn off the SSOV
gas valve. The blower relay will be deactivated and the Air/Fuel Valve will be closed.
Standby is displayed.
OMM-0137_J •
12/20/2022
STEPPER
MOTOR
IGNITION
VALVE POSITION
DIAL AT
25% to 35%
Figure 3-5: Air/Fuel Valve in Ignition Position
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 21 of 167