Bradford White U-TW4-75S-76R-3N - Manual (Page 11)

Page 11
Specifications
Wiring Diagram
Control Timings
Ignition State Timing
Pre-purge 15 seconds
Trial for Ignition 90 seconds
Flame Stabilization Period 3 seconds
Inter-purge 15 seconds
Flame Failure Response Time 1.5 seconds (2 second maximum, 1 second minimum)
Post-purge 15 seconds
PS Fault Delay (failed open/close) Retry after 2 minutes
Soft Lockout Retry after 5 minutes
TCO Limit Lockout Indefinite (see page 34 to reset)
Verify Resistive Delay Retry after 2 minutes (repeats 5 times)
Simulated Resistive Load Lockout Indefinite (cycle power to reset)
Hardware Error Lockout Indefinite (self clears if fault clears for at least 15 seconds)
M
BLOWER
BK
W
R
BL
W
BK
Honeywell
W
PILOT
G Y
G
SWITCH
BLOWER
SWITCH
PRESSURE
R
BL
Y
TEMPERATURE
BLOWER
G
W
MOTOR
FLAMMABLE
VAPOR SENSOR
WATER TEMPERATURE
SENSOR
Y
PLUG
BK
BK
BK
RESETTABLE
THERMAL
11