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Robust Environmental Rating: Designed to operate in high-humidity environments with a high-temperature bellows seal
By replacing both the furnace ignitor and the flame sensor simultaneously
The assembly includes a factory-integrated indicator plate for immediate visual valve position indication
typically 0-10VDC or 4-20mA
4A for consistent startup even under high load
McDonnell & Miller 51-S-2 Switch R-410A Robust Environmental Rating: Designed toThe McDonnell & Miller 51 S 2 is a heavy duty mechanical water feeder and low water cut off (LWCO) designed for low pressure steam and hot water boilers. Engineered for systems with a maximum vessel pressure of 35 psi, this unit features a snap acting SPDT switch that ensures positive electrical contact for burner control or alarm signaling. The 1" NPT connections allow for straightforward integration into existing boiler piping, providing a reliable
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