It must be paired with an RA 2000 series radiator valve

Featuring a broad temperature range of -1°F to 59°F and a fixed 5°F differential

For silicon carbide or nitrated hot surface ignition

The A421AEC-01 automatically determines the mode based on the user-defined On and Off setpoints

the T-4756-201 provides the reliable throttling range and sensitivity required for complex branch line configurations

York S1-025-26380-000 Terminal Block 326058-755 It must be paired withThe York S1 025 26380 000 Terminal Block is a high integrity electrical distribution component engineered for demanding HVACR applications. Designed for seamless integration into York air conditioning units, heat pumps, and furnaces, this OEM replacement terminal block provides a secure landing point for field and factory wiring. Its robust construction minimizes signal distortion and prevents common electrical faults caused by vibration induced