it offers proportional control for chilled water

eliminating safety risks

or the unit failing to proceed past the pre-purge phase because the pressure switch won't close

When servicing an RPZ

Greenheck 311742 Motor 319848-301 it offers proportional control forThe Greenheck 311742 Motor is a high performance 1 8 HP replacement motor engineered specifically for technical reliability in commercial exhaust systems and supply fans. Operating on a 115V single phase 60Hz power supply, this PSC motor (Permanent Split Capacitor) delivers a nominal 92. 6 watts of power with a maximum current draw of 1. 6 Amps. Designed for versatile airflow control, it features a 3 speed configuration reaching 1550 RPM at high