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Siemens GRD221.1U 2-Position S/R Fire/Smoke Damper Actuator 120V

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Special Price $170.45 Regular Price $196.02
In stock
SKU
GRD221.1U
The Siemens GRD221.1U Fire/Smoke Damper Actuator functions to manage the operations of fire and smoke dampers integrated into HVAC systems by using 120V power. The 120V-powered mechanism operates to block fire and smoke from spreading through ductwork improving building safety and compliance. The actuator functions with commercial and industrial ventilation systems through its spring return feature which maintains automatic damper positioning when power supply fails. This actuator enables better air control and enhances system reliability and helps fulfill fire protection requirements.
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Manufacturer:
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Manufacturer Name: Siemens Building Technology
Product Number: GRD221.1U
OEM Part Number: GRD221.1U
Product Description: 120V 2Pos S/R Fire/Smoke Actr
Weight:3.87lbs/1755.4g

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Product Questions (2)
Customer Questions
What maintenance is required for the Siemens GRD221.1U Damper Actuator?

Inspect the actuator regularly for dust buildup and mechanical obstructions. Ensure electrical connections are tight and free from corrosion. Test operation periodically to confirm proper damper movement. Proper maintenance ensures accurate fire and smoke control performance and system safety.

What are common issues with the Siemens GRD221.1U Damper Actuator?

  • Electrical failure or actuator not responding to control signals.
  • Gear wear causing slow or incomplete damper movement.
  • Wiring issues leading to intermittent operation or signal loss.
  • Mechanical jamming due to debris or misalignment in damper assembly.

Installation Steps

Step 1: Disconnect power and check supply is fully isolated.

Step 2: Access damper assembly and remove old actuator, noting shaft position.

Step 3: Mount new actuator securely to damper bracket and align drive shaft.

Step 4: Set linkage and ensure proper spring return orientation.

Step 5: Connect wiring per control diagram and secure all terminals.

Step 6: Restore power and test full open/close cycle.