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Replacing the relay prevents further control board strain
Rugged Construction: Built with a corrosion-resistant brass body and watertight NEMA 4X enclosure
It is typically installed in parallel with the secondary side of the control power transformer to ensure the board power supply is thoroughly protected from upstream surges before they reach the logic circuits
Common Questions: Is the 985-7031-06 compatible with different refrigerants
Always verify the part number on your existing hopper before installation
Siemens Building Technology 331-3000 Actuator 318172-701 Replacing the relay prevents furtherThe Siemens 331 3000 is a heavy duty, No. 4 pneumatic damper actuator engineered for reliable control of large dampers in commercial HVAC environments. As a veteran preferred HVAC pneumatic control solution, this rugged, metal fabricated unit is designed to provide gradual or positive actuation of terminal units, mixing boxes, and fire smoke dampers. It features a 4 inch stroke and a nominal 3 7 psi spring range, allowing for precise sequencing with