SIT 845 Sigma Gas Valve for Beretta Ciao 24 Ref. 0063AS4831
SIT gas valve model 845 Sigma, manufactured in Italy (Padova), multigas (ALLGAS). It regulates the gas flow to the burner in Beretta Ciao 24 and Super Exclusive boilers. Replacement requires first confirming the fault of the part through technical diagnosis, even when the boiler does not ignite, is blocked due to lack of gas, or the valve loses tightness.
- Type of part
- Gas valves
- Status
- Refurbished
- Catalogue reference
- 10021021
- Warranty
- 1 year
Beretta boilers compatible with reference 10021021
Gas valve with reference 10021021. Three confirmed compatibilities: CIAO 24 CAI and CIAO 24 CSI.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Beretta CIAO 24 CAI | Hello | Contrasted |
| Beretta CIAO 24 CSI | Hello | Contrasted |
| Beretta SUPER EXCLUSIVE 24 CAI | Super Exclusive | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if the ref. 10021021 is the part for your boiler
The part reference, model, and equipment revision must be verified against the manufacturer's documentation.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 10021021. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms that require diagnosis in the gas valve 10021021
The gas valve regulates and modulates the gas flow to the burner. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The boiler does not ignite or gets locked when trying to start it without producing a flame.
Cause: The gas valve does not open the passage to the burner, and the control board does not detect a flame, which causes it to lock out for safety.
Check that the gas shut-off valve is fully open and that it hasn't been closed after a recent inspection before declaring the valve faulty.
- 02
There is a smell of gas in the area of the gas valve, even though the boiler is working.
Cause: The internal sealing or the seals of the gas valve have failed and are leaking gas.
Pass soapy water through the threaded connections of the inlet and outlet before assuming that the leak is coming from inside the gas valve.
- 03
The burner either goes to full power or drops suddenly, the flame does not regulate properly.
Cause: The gas valve modulation regulator does not correctly adjust the gas flow according to demand.
Check that the burner and the heat exchanger are clean of soot, as dirty combustion can also cause the flame to appear poorly modulated.
- 04
After several ignition attempts, the boiler becomes locked.
Cause: The valve takes time to open or does not open completely, and the control board exhausts the allowed ignition attempts.
Wait a few minutes and try a single reset; if it always gets stuck at the same point in the cycle, it points more towards the gas valve than a specific fault.
Beretta fault codes that require diagnosis
| Code | Fault | Technical checks |
|---|---|---|
| A01 | ACF module lockout alarm | If the gas valve (SIT, ref. 10021021) does not open or is not powered during ignition, no gas reaches the burner and the ACF does not detect a flame, resulting in a lockout with A01; check the voltage at the valve terminals during the ignition attempt and gas pressures at the inlet/outlet. |
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Data sheet for the gas valve Beretta 10021021
- Catalogue reference
- 10021021
- Uniclima internal SKU
- VDGBCIAO24
- Brand
- Beretta
- Type of part
- Gas valves
- Units in stock
- 5 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Part data and available documentation
Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.
- Manufacturer
- SIT
- Model
- 845 Sigma
- Manufacturer code
- 0063AS4831
- Place of manufacture
- Made in Italy (Padua)
- Gas
- ALLGAS (multi-gas)
Manuals and technical documentation
Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.
- Beretta Ciao 24 CSI Manual (PDF) Document © Beretta, provided as a technical reference.
Frequently asked questions about the gas valve 10021021
Who manufactures the SIT 845 Sigma gas valve for the Beretta Ciao 24?
Does the SIT 845 Sigma gas valve work for natural gas and LPG in a Beretta Ciao 24 CSI?
Does this SIT 845 Sigma gas valve work for a Beretta Super Exclusive 26 RSI?
Why is the SIT 845 Sigma gas valve replaced in a Beretta Ciao 24 CAI?
Spare parts related to Beretta Ciao
