McDonnell & Miller 42S Controller 30067439-890 The UEi PDT550 Digital Pocket

The UEi PDT550 Digital Pocket Thermometer is a precision-engineered diagnostic tool designed for high-stakes HVAC/R system servicing and temperature-critical environmental inspections

and pool heaters with a capacity of up to 240

keep the container tightly sealed until use

Broad Cross-Reference: Directly replaces obsolete part numbers 193804

the element should be "snaked" horizontally across the downstream side of the heating coil or upstream of the cooling coil

McDonnell & Miller 42S Controller 30067439-890 The UEi PDT550 Digital PocketThe McDonnell & Miller 42S Controller (Part Number 129302) is a critical float operated combination low water cut off (LWCO) and pump controller designed for residential, commercial, and industrial steam boilers. Engineered for systems with a separate water column, this steam boiler water level control features dual SPST snap action switches that provide reliable automatic reset functionality. The 129302 pump controller handles a maximum operating