Carrier HK30WA514 Drive 318172-701 The McDonnell & Miller 159S

The McDonnell & Miller 159S Controller (Part Number 178802) is a specialized combination low water cut-off and pump controller designed for heavy-duty commercial and industrial steam boiler applications

serving as a primary safety device to prevent heat exchanger damage from restricted airflow or blower failure

offering a refrigerant capacity of 17 tons for R22 and 12

Specifically calibrated to a 1

The 24V AC solenoid coil is housed in a NEMA 4X enclosure

Carrier HK30WA514 Drive 318172-701 The McDonnell & Miller 159SThe Carrier HK30WA514 is a 7. 5 HP Variable Frequency Drive designed for heavy duty commercial HVAC systems, specifically optimized for large rooftop unit applications. Operating on 380 480V three phase power, this motor drive allows for precise calibration of the indoor fan motor speed to match exact cooling, heating, and ventilation requirements. By replacing standard on off cycles with variable speed control, the HK30WA514 helps technicians