LCD Wiring Diagram Presentation B / B
Power Off-On Switch 120V Power Supply
Power Switch ON
24 Volt Transformer Powered
Low Operator
Call for Heat
Pump Relay Energized
Pump Contact Closes
Pump Energizes
Flow Switch Makes
Fan Manager Energizes
Fan Contact Closes
Fan Energized on Low Speed
Low Air Pressure Switch Makes
Pre-purge Relay Energizes
Low Pilot Gas Valve & R7 Relay Energized
R7 Contact Makes
Spark Generator Energizes
Flame Rod Senses Pilot
Gas Valve Energized on Low R7 Relay Drops Out Via R8 Relay
R8 Contact Makes
Safety Solenoid Energizes R7 Contact Drops Out Spark
High Operator Calls Second Stage
High Speed Blower Relay Energizes
Blower Ramps to High Speed
High Pressure Air Switch Makes
High Fire Relay Energizes
Gas Valve Energized on High Pilot Valve Energized on High
Loss of Pilot Flame
Retry After 5- Min. Wait
Flame Safeguard in Lockout Mode Alarm Contacts Close R1 Energizes Unit Failed to Light
R1 Contact Breaks
Fan Manager Times Out
Fan Drops Out
Pressure Switches Break
Reset Button Pressed
Pilot Ignition Retry Successful
High Fire Established
Call for Heat Drops Out
Blower Post Purge Times Out
Pump Purge Times Out
THANK YOU! We look forward to working closely with all of you in the near future: