Description
This depends on the unit's wiring schematic
it allows the unit to modulate firing rates based on accurate supply and return water temperature differentials
The Lennox 58C97 Relay is a high-performance SPST Heat Sequencer Relay designed specifically for managing timed electrical sequences in residential and commercial HVAC systems
the internal disc has likely permanentally tripped or failed
Antunes Controls 803112601 Pressure Switch Els PW 17895 This depends on the unit'sThe Antunes Controls 803112601 Pressure Switch (Model HGP A) is a high performance safety interlocking device engineered for industrial combustion systems and gas trains. This manual reset SPDT pressure switch is designed to monitor gas pressure and instantly break the electrical control circuit if levels rise above the adjusted setpoint. With a field adjustable range of 2 16" W. C. (50 400 mm W. C.), it provides precise high gas pressure limit