Siemens Building Technology 331-2961 Actuator 321894-706 Designed as the dedicated ZS-101

Designed as the dedicated ZS-101 mounting plate for the Belimo ZS-100 weather shield

the internal timing circuit of the electronic relay has likely failed

Verify that the venting is clear and the tubing is not cracked before replacing the switch

Simplified Installation: No outlet flange simplifies the mounting process in tight furnace cabinets

The Heil Quaker ICP 1172986 Wire Harness is a heavy-duty Unit Harness Assembly designed for technical cross-compatibility across several ICP brands

Siemens Building Technology 331-2961 Actuator 321894-706 Designed as the dedicated ZS-101The Siemens 331 2961 is a high performance No. 4 pneumatic damper actuator engineered for precise control in commercial HVAC systems. This rugged, metal fabricated pneumatic piston actuator features a 4 inch stroke and is designed for the gradual or positive actuation of dampers in ventilating systems, mixing boxes, and air handling units. With a 8 13 psi spring range, it provides the necessary force for reliable operation in high demand environments.