and 174 Broan heater models

The 480Vac coil is housed in a NEMA 4X enclosure

reducing labor time during critical HVAC system repairs and restoring factory-spec airflow to the conditioned space

allowing technicians to troubleshoot damper positioning and sensor faults without additional specialized tools

The sensor monitors the exact speed of the inducer wheel

Dwyer Instruments 1638-5 Pressure Switch 320735-701 and 174 Broan heater modelsFor high precision air pressure monitoring in commercial HVAC and industrial process control, the Dwyer Instruments 1638 5 Pressure Switch is the technician's standard for reliability. Engineering with a large diaphragm design, this unit provides superior sensitivity for detecting differential pressure within a range of 2. 0 to 6. 0" w. c. The 1630 series is purpose built for clean air and non combustible gases, utilizing a silicone rubber diaphragm