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

Most technicians advise against permanent overrides as it bypasses critical safety protocols and reduces efficiency

Standardized Fit: 7/8" x 1/2" ODF brazed connections allow for straightforward drop-in replacement in most 4

the KIT16526 ensures the HVAC communication protocol remains uncompromised

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

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