Control Timings - Bradford White UPV Series Service Manual

Control Timings

Ignition State
Flame Stabilization Period
Inter-purge
Flame Failure Response Time
Post-purge
PS Fault Delay (failed open/close)
Soft Lockout
ECO Limit Lockout
Verify Resistive Delay
Flammable Vapor Sensor/Simulated Resistive
Load Lockout
Hardware Status Lockout
Wiring Diagram
Pre-purge
Trial
Timing
15 seconds
90 seconds
3 seconds
15 seconds
1.5 seconds (2 second maximum; 1 second
minimum)
15 Seconds
Retry after 2 minutes
Retry after 5 minutes
Indefinite (see page 26)
Retry after 2 minutes (repeats 5 times)
Indefinite (cycle power to restart)
Indefinite (self clears if fault clears for at least 15
seconds)
9
9