In high-efficiency York residential gas furnaces

this sequencer is typically wired to trigger the furnace blower and the first stage of electric heat simultaneously to ensure the heat exchanger does not overheat

Installing a higher-rated switch can lead to unsafe operating conditions

Is the ZTH compatible with older Belimo models

or no-flame conditions despite a successful pilot or hot surface igniter cycle

Resideo V8043C1124 Zone Valve 322838-752 In high-efficiency York residential gasThe Resideo V8043C1124 Zone Valve is a reliable, two position hydronic control engineered for high demand residential and light commercial heating systems. Designed specifically for closed loop hydronic setups, this 24V zone valve utilizes a 1 2" inverted flare connection to provide precision straight through flow control. Running on a robust 24 VAC synchronous motor, the unit features a normally closed (N. C.) configuration with a spring return to