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If you need to change the blower speed to adjust for external static pressure
Will this spark module work for both Natural Gas and Propane units
and 4-20mA (utilizing the included 500 Ohm resistor)
Engineered specifically for natural gas (NG) applications
Gear Train Protection: The "lost motion" drive mechanism absorbs shocks at the end of the stroke to prevent premature mechanical wear
Tekmar Controls 257 Control 321894-706 If you need to changeThe 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
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