Viessmann
Viessmann Expansion Vessel 7823844
Expansion vessel for Viessmann Vitodens 100 WB1A combi and system boilers manufactured from 14 January 2005.
At a glance
- Appliance family: Vitodens 100 WB1A
- Also known as 2320046, N7953
£163.80
£136.50 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Viessmann 7823844 is an expansion vessel for Vitodens 100 WB1A combi and system boilers manufactured from 14 January 2005. It absorbs the volume increase of water as the sealed heating system heats up, helping to maintain stable system pressure.
Signs this part needs replacing
- System pressure rises sharply when the boiler heats up and drops when it cools
- The pressure relief valve discharges water during heating cycles
- Frequent topping up of system pressure is required
- Knocking, gurgling or air noise from the boiler during operation
- Water or corrosion visible around the vessel connection
Before you order
- Confirm the boiler model and serial number against the fitment list above
- Check the appliance was manufactured on or after 14 January 2005
- Match the part number 7823844 to the component being replaced
- Rule out other causes of pressure loss, such as a leaking system or a faulty pressure relief valve
Compliance
| Alternative numbers | 2320046, N7953 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100 SYSTEM 24KW | — | — | — | |
| VIESSMANN VITODENS 100 SYSTEM BOILER 24KW SERIAL No. 7179918 | — | — | — | |
| VIESSMANN VITODENS WB1A COMBI 24KW | — | — | — | |
| VIESSMANN VITODENS WB1A COMBI 24KW SERIAL No. 7179917 | — | — | — | |
| VIESSMANN VITODENS WB1A COMBI 30KW | — | — | — | |
| VIESSMANN VITODENS WB1A COMBI 30KW SERIAL No. 7179916 | 47-819-05 | 47-819-05 | — | — |
| VIESSMANN VITODENS WB1A COMBI C24KW (7246794) | — | — | — | |
| VIESSMANN VITODENS WB1A COMBI C24KW (7247428) | — | — | — | |
| VIESSMANN VITODENS WB1A COMBI C24KW (7248590) | — | — | — | |
| VIESSMANN VITODENS WB1A COMBI C24KW SERIAL No. 7246794 | — | — | — |
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