Resideo AT87A1155 Transformer 320788-702 The integrated scale is calibrated

The integrated scale is calibrated for a range of 60°F to 90°F

and Teflon-to-metal seating for high-pressure reliability and leak prevention

the integrated electronic module has likely failed

Its compact 1/2-inch NPT inlet and outlet ports allow for simplified integration in tight furnace vestibules

contractors can restore original system efficiency while replacing deprecated part numbers S1-024-26003-000 and S1-024-25110-000 without the need for mounting modifications or bracket fabrication

Resideo AT87A1155 Transformer 320788-702 The integrated scale is calibratedUpgrade your industrial or commercial HVAC control systems with the Resideo AT87A1155 Transformer. Designed for high voltage environments, this 480V to 24V step down transformer provides a reliable 48VA power supply to run air conditioning circuits, 24V thermostats, and building automation controllers. As a NEMA Type E transformer, it features built in energy limiting overload protection per NEC Class 2 standards, ensuring your low voltage components