Viessmann 7831028 Radial Fan R-134A Always wrap the valve body

Always wrap the valve body in a wet rag or use a heat-sink paste during installation

Industrial Build: Engineered for long-term exposure to outdoor elements without losing structural integrity or pitch

Technicians should first verify 120/240V power at the 5-pin harness and 24V signals at the 4-pin connector

Using it with synthetic oils or higher-pressure refrigerants will lead to immediate mechanical failure

Integrated Safety: Features a high-capacity pilot filter and ECO (Energy Cut-Off) terminals to prevent overheating conditions

Viessmann 7831028 Radial Fan R-134A Always wrap the valve bodyThe Viessmann 7831028 Radial Fan is a critical combustion air blower component designed for high efficiency boiler systems, specifically the Vitodens 200 and Vitodens 300 series. As an RLS154 radial fan, this unit is engineered to manage precise air fuel ratios required for condensing boiler modulation. This specific SKU is provided without electrics, meaning the housing and impeller assembly are intended for field integration with your existing