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Direct OEM Compatibility: Serves as the official successor to 624721 and 621957
How do I ensure a leak-free inverted flare connection
it enables the normally closed E2 main valve to respond accurately to pilot signals
the Q4100C9046 serves as a direct cross-reference for several legacy components
Tekmar Controls 257 Control 324846-701 Direct OEM Compatibility: Serves asThe 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