this 30A power relay features a 22VDC coil and a dust-protected plastic case for reliable operation in harsh environments

Aside from physical damage during a motor change-out

This manual-handle valve is built to survive the rigors of field service

and 100165916

avoid mounting the actuator below the horizontal plane to prevent moisture from entering the housing

Caleffi ZVR104 Relay 319852-301 this 30A power relay featuresThe Caleffi ZVR104 is a professional grade 4 zone valve relay designed for precise control of hydronic heating systems. Serving as a direct HPZC104 replacement, this multi zone controller manages up to four zone valves and features priority zoning functionality, allowing a single zone to be designated for domestic hot water (DHW) production. Engineered with a multi pin selectable priority option, the ZVR104 ensures that space heating loads are