Technicians recognize this board as the central hub for terminal connections

The included A2L compliant sticker is required for safety documentation and field labeling when replacing components in newer systems that use flammable refrigerants

This model includes two built-in auxiliary switches that provide feedback at 10 and 80 degrees of rotation for remote monitoring of actuator status

it is compatible with any system requiring an L170-40F specification

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Resideo ZD28X10TZ Damper L99H008 Technicians recognize this board asThe Resideo ZD28X10TZ is a heavy duty, 28" x 10" parallel blade zone damper engineered for high performance volume control in HVAC forced air systems. Designed for reliability, this rectangular duct damper utilizes a 24Vac synchronous motor to provide precise airflow management, making it the standard choice for contractors integrating with Honeywell Home TrueZONE panels. This model is configured as a power closed spring return open (PC SRO) unit,