Service Manual

Control Timings
Ignition State Timing
Pre-purge 2 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 24 to reset)
Simulated Resistive Load Lockout Indefinite (cycle power to reset)
Hardware Error Lockout Indefinite (self clears if fault clears for at least 15 seconds)
Verify Resistive Delay Retry after 2 Minutes (repeats 5 times)
Specifications
Page 9
A
C
B
Blower
Motor
Blower
Temperature
Switch
Pressure
Switch
Pilot
Blower
Housing
Wiring Diagram
Simulated
Resistive
Device
Thermal
Well
Page 9
Control Timings
Ignition State Timing
Pre-purge 2 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 (cycle power to restart)
Verify Flammable Vapor Sensor Lockout Indefinite (cycle power to restart)
Hardware Error Lockout Indefinite (self clears if fault clears for at least 15 seconds)
Verify Flammable Vapor Sensor Delay Retry after 2 Minutes (repeats 5 times)
Specifications
Page 9
Blower
Motor
Blower
Temperature
Switch
Pressure
Switch
Pilot
Blower
Housing
Wiring Diagram
Flammable
Vapor
Sensor
Thermal
Well
A
C
B