Viessmann 7828749 Flow Sensor
The Viessmann 7828749 Flow Sensor is a critical OEM replacement component engineered for high-accuracy liquid measurement in Vitodens series boilers. This sensor is specifically designed for integration into Viessmann B1KA and Viessmann CPK systems, providing the real-time feedback required for the control unit to modulate burner output and manage domestic hot water (DHW) priority. By monitoring flow rates with a measuring range typically calibrated for residential and light commercial hydronic demands, it prevents dry-fire conditions and ensures the heat exchanger operates within safe thermal parameters.
For technicians servicing the Vitodens 100-W, this genuine Viessmann part solves common circulation faults and "no hot water" calls where the boiler fails to detect demand. The 7828749 utilizes a durable plastic housing with a 3-pin plug-and-play connection, allowing for rapid installation during routine maintenance or emergency repairs. Maintaining an accurate boiler flow switch signal is vital for system balancing and long-term HVAC efficiency, preventing unnecessary cycling and reducing wear on the primary pump.
Key Benefits for the Contractor:- Precise Flow Detection: Accurately monitors water velocity to ensure the PCB triggers the burner only when sufficient flow is present.
- OEM Compatibility: Guaranteed fit for Viessmann B1KA combi boilers and CPK series models without field modifications.
- System Protection: Acts as a primary safety boundary to mitigate overheating and thermal stress on the heat exchanger.
- Direct Replacement: Features the standard 3-pin connector and clip-in mounting for fast, reliable swaps in the field.
What are the symptoms of a failing Viessmann 7828749 sensor?
Common indicators include the boiler failing to switch to DHW mode when a tap is opened, or the unit throwing a Fault Code 52 (Flow sensor shorted) or 5A (Flow sensor wire broken) on the Vitodens 100-W control interface.
Can I clean the flow sensor instead of replacing it?
While debris can occasionally jam the internal turbine or paddle, mineral scaling often degrades the sensor's sensitivity. For professional applications, replacing the 7828749 is recommended to ensure the safety logic of the boiler remains uncompromised.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Viessmann 7828749 Flow Sensor is a critical OEM replacement component engineered for high-accuracy liquid measurement in Vitodens series boilers. This sensor is specifically designed for integration into Viessmann B1KA and Viessmann CPK systems, providing the real-time feedback required for the control unit to modulate burner output and manage domestic hot water (DHW) priority. By monitoring flow rates with a measuring range typically calibrated for residential and light commercial hydronic demands, it prevents dry-fire conditions and ensures the heat exchanger operates within safe thermal parameters.
For technicians servicing the Vitodens 100-W, this genuine Viessmann part solves common circulation faults and "no hot water" calls where the boiler fails to detect demand. The 7828749 utilizes a durable plastic housing with a 3-pin plug-and-play connection, allowing for rapid installation during routine maintenance or emergency repairs. Maintaining an accurate boiler flow switch signal is vital for system balancing and long-term HVAC efficiency, preventing unnecessary cycling and reducing wear on the primary pump.
Key Benefits for the Contractor:- Precise Flow Detection: Accurately monitors water velocity to ensure the PCB triggers the burner only when sufficient flow is present.
- OEM Compatibility: Guaranteed fit for Viessmann B1KA combi boilers and CPK series models without field modifications.
- System Protection: Acts as a primary safety boundary to mitigate overheating and thermal stress on the heat exchanger.
- Direct Replacement: Features the standard 3-pin connector and clip-in mounting for fast, reliable swaps in the field.
What are the symptoms of a failing Viessmann 7828749 sensor?
Common indicators include the boiler failing to switch to DHW mode when a tap is opened, or the unit throwing a Fault Code 52 (Flow sensor shorted) or 5A (Flow sensor wire broken) on the Vitodens 100-W control interface.
Can I clean the flow sensor instead of replacing it?
While debris can occasionally jam the internal turbine or paddle, mineral scaling often degrades the sensor's sensitivity. For professional applications, replacing the 7828749 is recommended to ensure the safety logic of the boiler remains uncompromised.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
