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This series 880 cast iron model features a 3/4" NPT connection and is designed to operate efficiently up to a 150 PSI maximum working pressure
Veteran technicians recognize this as a vital safeguard against heat exchanger rollout or blower motor failure
this is a "Coil Only" replacement item
The P323423 is a complete motor and blower wheel assembly
Dwyer Instruments TSW-250 Temperature Switch 318518-761 This series 880 cast ironThe Dwyer Instruments TSW 250 is a rugged, digital temperature switch designed for heavy duty HVACR and industrial processes. This dual stage temperature control features a weatherproof NEMA 4X enclosure, making it the standard for rooftop units and washdown environments. Operating on a universal 90 to 255 Vac power supply, the TSW 250 eliminates the need for separate models for different voltage requirements. The unit utilizes a precise PTC