Danfoss 193B-1603 ARA664 Actuator Freon Common Questions & Technical Support

Common Questions & Technical Support How do I test the 42-21786-81 coil

For contractors performing scheduled HVAC valve maintenance or emergency repairs

Industrial Durability: Rated for a maximum operating temperature of 200°F at the sensing bulb

while the integrated end switch allows for seamless sequence-of-operation signaling to secondary equipment like fans or boilers

ensuring safety in high-traffic commercial kitchens

Danfoss 193B-1603 ARA664 Actuator Freon Common Questions & Technical SupportThe Danfoss 193B 1603 (ARA664) is a high torque 3 point floating actuator engineered for precise modulation of DN15 50 mixing valves. Operating on a 24V AC power supply, this unit provides 6 Nm of torque with a 90 degree operating range optimized at a 96 second run time. The integrated auxiliary switch allows for seamless end stop signaling or interlocking with external pumps and boilers, critical for complex hydronic balancing. Its compact design