Tekmar Controls 257 Control 326010-701 verify that your shaft diameter

verify that your shaft diameter matches the 1-1/4 inch bore and the housing clearances accommodate the 8-inch diameter and 9-inch width specifications

Key Benefits: Universal Compatibility: Fits most mid-to-large scale thermostats

Simplified Installation: Standard 208/230V single-phase electrical configuration matches existing field wiring for faster 1-to-1 swaps

A shorted contactor coil

Tekmar Controls 257 Control 326010-701 verify that your shaft diameterThe Tekmar Controls 257 Control is a purpose built 24Vac domestic hot water two stage boiler control designed for high demand applications such as hotels, laundromats, and multi family residential complexes. This sophisticated microprocessor control provides high accuracy domestic hot water temperature regulation by effectively staging up to two on off boilers or a single two stage boiler. Utilizing an NTC thermistor 10k ohm sensor, the 257 maintains