Ferroli
Ferroli Injector Main 5.6 NG 39821640
Main gas injector rated 5.6 for natural gas Ferroli Optimax HE boilers, metering gas into the burner.
At a glance
- Also known as 1210902
- Work on the gas path must be carried out by a Gas Safe registered engineer.
£9.19
£7.66 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 Ferroli 39821640 is a main gas injector rated at 5.6 for natural gas (NG) appliances. It is fitted in the burner assembly of the Ferroli Optimax HE boiler range, where it meters the gas supply into the burner for combustion. It is a serviceable component, normally renewed when the injector becomes restricted or combustion readings fall outside the manufacturer's tolerances.
Signs this part needs replacing
- Combustion analysis readings drifting outside the manufacturer's stated CO/CO₂ range
- Sooting or discolouration around the burner or heat exchanger
- Unstable or lazy flame at the burner
- Poor ignition or repeated lockouts
- Gas rate at the meter lower than the figure on the data badge
Before you order
- Confirm your boiler model and GC number against the list above.
- Check the appliance is set for natural gas (NG) — this is the 5.6 NG injector.
- Note the marking on the existing injector before removal so the replacement matches.
- Work on the gas path must be carried out by a Gas Safe registered engineer.
Compliance
| Alternative numbers | FER39821640, 1210902 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| FERROLI FERROLI OPTIMAX HE 25S | — | — | — | |
| FERROLI FERROLI OPTIMAX HE 31C | — | — | — | |
| FERROLI FERROLI OPTIMAX HE 31S | — | — | — | |
| FERROLI OPTIMAX HE 25S - 30K0318000 (21/09/2006) | 41-267-25 | 41-267-25 | — | — |
| FERROLI OPTIMAX HE 31C - 30K0321000 (23/10/2006) | 47-267-42 | 47-267-42 | — | — |
| FERROLI OPTIMAX HE 31S - 30K0320000 (25/09/2006) | 41-267-26 | 41-267-26 | — | — |
Documents & drawings
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