APOLLO Manifold Actuator 24VAC/DCAPOLLO Manifold Actuator 24VAC DC 24VAC DC thermal actuator designed for APOLLO radiant manifold zoning, with reliable open close control for individual loops. Key Benefits Compatible with APOLLO manifold zoning assemblies using an M30 x 1. 5 connection Supports zone by zone control when paired with the APOLLO thermostat and zone valve control German engineered for dependable hydronic system operation Corrosion resistant construction suited for