Belimo ZONE220N-50 Valve 318518-761 The auxiliary end switch provides

The auxiliary end switch provides a dry contact closure when the valve reaches the fully open position

direct replacement for the original 124361 board and is designed to work with compatible AERCO boiler and water heater configurations

Ensure all PVC trap connections are secure to prevent leaks

while incorrect wiring can damage the main HVAC control board

The unit features clockwise (CW) rotation (viewed from the lead end) and robust internal components engineered to withstand high ambient temperatures and demanding duty cycles

Belimo ZONE220N-50 Valve 318518-761 The auxiliary end switch providesThe Belimo ZONE220N 50 is a high performance 2 way zone valve designed for precise flow control in closed loop hydronic systems. Featuring a 3 4" NPT female pipe thread connection and a 3. 6 Cv rating, this valve is engineered for efficiency in baseboard, convector, and fan coil applications. The forged brass body ensures long term durability under standard operating pressures, while the chrome plated brass ball and EPDM O rings provide a reliable