Cleveland Controls NS2-3126-00 Pressure Switch 318172-701 Fail-Safe Logic: Spring return ensures

Fail-Safe Logic: Spring return ensures the damper defaults to the open position during power loss

While the M520 series is compatible with various gases

It is recommended to install the valve in a horizontal or upright position

This blade is strictly for Clockwise (CW) rotation

This model typically includes the mounting grommets and spacers

Cleveland Controls NS2-3126-00 Pressure Switch 318172-701 Fail-Safe Logic: Spring return ensuresThe Cleveland Controls NS2 3126 00 Pressure Switch is a genuine OEM air pressure switch engineered for reliable pressure sensing in gas furnaces, HVAC equipment, boilers, and other combustion air systems. Factory calibrated to 0. 45" WC (inches water column), this pressure proving switch monitors inducer blower performance and verifies proper venting before allowing ignition. Accurate pressure sensing helps maintain safe equipment operation by