Ensure the shield is grounded only at the thermostat subbase to prevent ground loops

This specific Source 1 flame sensor is optimized for model series starting with DGAA and DGAH

transformers

The Bard HVAC 8201-008BX Relay is a specialized 24V SPST normally open relay designed for high-reliability switching in Bard wall-mount air conditioners and heat pumps

and TUE furnace series

Functional Devices TR150VA001 Transformer Ensure the shield is groundedWhen you need to power multiple 24Vac control circuits from a single source, the Functional Devices TR150VA001 Transformer is the heavy duty solution. This 150VA rated power supply is designed for professional HVACR and building automation applications where lower capacity transformers fall short. Built with a 120Vac primary voltage input, it provides a stable 24Vac secondary voltage output, optimized for powering large banks of relays, temperature