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

and TUE furnace series

It serves as the direct cross-reference for legacy part numbers C6437501

Can this overload be bypassed for troubleshooting

transformers

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