SIGMA Gas Valve For Hermann Micra Condens 26 - Ref. 022004879
Gas valve manufactured by SIGMA that regulates the gas intake and controls the solenoid valves EV1 and EV2 of the Hermann Micra Condens 26 boiler. The catalog previously attributed it to SIT, but the label on the part says SIGMA. It is replaced when the boiler does not ignite or there is a failure in the gas supply to the burner.
VAT included
Consult via WhatsAppHermann boilers compatible with reference 022004879
Gas valve with reference 022004879. A proven compatibility: Micra Condens 26.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Hermann Micra Condens 26 | Micra Condens | 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 ref. 022004879 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 022004879. 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 and faults that the gas valve 022004879 resolves.
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 and the display shows an ignition fault when trying to turn it on.
Cause: If the solenoid valves EV1 or EV2 do not open, the burner does not receive enough gas for the flame to ignite.
Measure the gas inlet pressure and check the connectors of both coils before replacing the gas valve.
- 02
The boiler ignites, but the flame fluctuates on its own, without touching the thermostat.
Cause: The solenoid valve that regulates the modulation (EV2) is not dosing the gas to the burner properly.
Observe the flame through the sight glass: if it fluctuates a lot, note the display code before deciding to change it.
- 03
The boiler locks with a fault code related to gas when starting it up.
Cause: An electrical fault in one of the coils prevents the gas valve from fully opening as requested by the control board.
Reset the boiler and note the exact code: it will indicate whether the fault is with the gas valve or another component.
- 04
There is a slight smell of gas when the boiler starts up, although it disappears afterwards.
Cause: An incomplete closure of one of the solenoid valves allows some gas to escape when igniting it.
Check the threaded connections of the gas valve with soapy water before replacing it.
Fault codes Hermann that this part solves
| Code | Fault | Diagnosis and solution |
|---|---|---|
| 35 | Parasite flame (flame detection when there should be none). | The gas valve may remain partially open or fail to close on demand, allowing gas to pass and maintaining the flame when it should be off. Check with a manometer at the PINT/PIN ports and ensure that, without power to the coil, the valve closes and the pressure/ionisation drops. |
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 Hermann 022004879
- Catalogue reference
- 022004879
- Brand
- Hermann
- Type of part
- Gas valves
- Units in stock
- 5 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- Inlet pressure (Pl max)
- 60 mbar
- Outlet pressure (Po)
- 0.5-12 mbar
- EV1
- 220V~50Hz, 9.2 VA class B
- EV2
- 220V~50Hz, 2.8 VA class C
- Ambient temperature
- -10°C / 60°C
- Type code
- 0063AS 4831
- Factory code
- Code 0648107, Date 1016, Lot 0008827, Nr 1047
Frequently asked questions about the gas valve 022004879
Is the gas valve SIGMA Ref. 022004879 compatible with other models besides the Hermann Micra Condens 26?
What is the outlet pressure of the SIGMA gas valve in the Hermann Micra Condens 26?
Does the code Ref. 022004879 appear printed on the label of the valve?
What fault indicates that the gas valve of the Micra Condens 26 needs to be replaced?
What is the reference for the gas valve SIGMA for the Hermann Micra Condens 26?
What fault codes are documented for this gas valve?
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