The direct drive actuator modulates a 2-way, 3-way or 4-way valve that injects different rates of hot water, supplying virtually any water temperature to the heating system.Working off an adjustable reset ratio, the valve’s maximum and minimum system supply temperatures can be adjusted to support all types of jobs, including staple-up radiant floors that require a higher starting temperature.The iSeries-R includes an adjustable boiler protection function which prevents low water temperatures from returning to the boiler.With a multi-status LED indicator light, plug-in wiring connections and an easy to remove actuator, the installation could not be easier.
**Image is the sweat model.**