Simple Maintenance: The plug-in head design allows for quick removal and cleaning without disturbing the field wiring in the B210LP base

Is a neutral wire required for installation

always verify the rating on the new motor's nameplate before installation

Can this indicator be used with 4-wire systems

It should only be used with a 24-volt transformer and intermittent pilot or standing pilot ignition systems depending on the specific boiler series

McDonnell & Miller 42S-A Controller Refrigerant Simple Maintenance: The plug-in headMcDonnell & Miller?42S A Combination Low Water Cut Off and Pump Controller with SPST Snap Action Switches and Quick Hook Up Fittings for Steam Boilers (Part Number 129702) This item is not qualify for free shipping.