The kit contains the 06NA660028 filter element and the specific O-ring required for the housing cover

How do I check for groove wear

additional linkage may be required

While the actuator is easily replaced

the assembly features a high-rpm motor and balanced impeller to minimize vibration and bearing wear under continuous duty cycles

Siemens Building Technology GQD221.1U Actuator 320819-301 The kit contains the 06NA660028The Siemens GQD221. 1U Actuator is a direct coupled OpenAir spring return actuator engineered for precise 2 position control in commercial HVAC systems. Operating at 120V AC, this 20 lb in damper actuator is ideal for constant or variable air volume (VAV) installations, common in exhaust, mixed air, and face and bypass applications. Its compact footprint allows for seamless integration into tight enclosures, while the NEMA 1 (IP40) rated housing