Viessmann
Viessmann Venturi Extension B1HA/B1KA 7838138
Viessmann venturi extension, part 7838138, for Vitodens 100-W B1HA and B1KA boilers.
At a glance
- Also known as 2322054
£56.71
£47.26 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 venturi extension is a gas and air path component used on Vitodens 100-W boilers, listed by Viessmann under part number 7838138. It forms part of the venturi assembly that manages the mixture of gas and combustion air before it reaches the burner. The part is listed for both the B1HA system and B1KA combi variants of this appliance family.
Signs this part needs replacing
- Combustion readings outside the expected range that cannot be corrected by adjustment
- Whistling or unusual noise from the gas and air intake area during firing
- Unstable flame signal, rough light-off or repeated ignition attempts
- Boiler locking out or failing to modulate cleanly under demand
- Visible damage, distortion or blockage at the venturi extension
Before you order
- Confirm the boiler model and serial number against the fit list above, as fitment is serial-number specific
- Check the appliance kW rating against the listed 19/26 kW and 30/35 kW variants
- Confirm the existing part carries Viessmann number 7838138
- Gas-carrying components should be fitted and commissioned by a competent, registered engineer
Compliance
| Alternative numbers | 2322054 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 050-W BPJC 29 KW COMBI SERIAL No. 7537906 | 47-819-31 | 47-819-31 | — | — |
| VIESSMANN VITODENS 050-W BPJC 35 KW COMBI SERIAL No. 7537947 | 47-819-32 | 47-819-32 | — | — |
| VIESSMANN VITODENS 050-W BPJD 29KW COMBI SERIAL No. 7202938 | 47-819-38 | 47-819-38 | — | — |
| VIESSMANN VITODENS 050-W BPJD 35 KW COMBI SERIAL No. 7202939 | 47-819-39 | 47-819-39 | — | — |
| VIESSMANN VITODENS 100-W B1HA 19 KW SYSTEM ERP SERIAL No. 7543420 | 41-819-36 | 41-819-36 | — | — |
| VIESSMANN VITODENS 100-W B1HA 26 KW SYSTEM ERP SERIAL No. 7543421 | 41-819-37 | 41-819-37 | — | — |
| VIESSMANN VITODENS 100-W B1HA 26 SERIAL No. 7560853 | — | — | — | |
| VIESSMANN VITODENS 100-W B1HA 30 KW SYSTEM ERP SERIAL No. 7543423 | 41-819-38 | 41-819-38 | — | — |
| VIESSMANN VITODENS 100-W B1HA 35 KW SYSTEM ERP SERIAL No. 7543425 | 41-819-39 | 41-819-39 | — | — |
| VIESSMANN VITODENS 100-W B1HA 35 SERIAL No. 7560854 | — | — | — |
Showing 10 of 23 compatible appliances.
Documents & drawings
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