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Common Questions & Technical Support What is the maximum temperature rating for the Kunkle 537 series
Extended 48-Inch Reach: The long-format lead allows for flexible routing around heat exchangers and draft inducers
sharing all technical specifications and performance ratings
Mechanical Reliability: Proven Robertshaw D1 series design minimizes drift and maximizes switch longevity
Can I use a generic adjustable switch instead of the 112107
McDonnell & Miller 150S-MD-HD Controller R-410A Common Questions & Technical SupportThe McDonnell & Miller 150S MD HD (Part Number 173103) is a high performance combination low water cut off and pump controller head mechanism designed for demanding commercial and industrial steam boiler applications. This specific model features maximum differential operation, a critical function that prevents nuisance burner shutdowns in systems with fluctuating water levels or low pressure environments. By providing a wider 7 8 inch differential
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