HELLO ! CAN ANYONE TELL ME HOW TO FILL THE SYSTEM (I THINK) OF A FERROLI BOILER. i HAD A RADIATOR RE FITTED AFTER TILING BATHROOM AND THE PRESSURE IS ZERO . I CAN'T REMEMBER HOW I'M SUPPOSED TO REINSTATE THE PRESSURE. ITS A FERROLI OPTIMAX HE COMBI 31kw. ?????

Try bleeding the air out of the rads then represure system

You should have 12psi for boiler to operate properly. Sounds like first you have a leak in your sytem. Second sounds like pressure reducing valve is not working properly.

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Is there an error code? If not the flow sensor for the hot water could be faulty. Also if you've had a power cut depending which model of Optimax HE you have, you sometimes have to tell the boiler it's a Combi, as they have a generic Pcb fitted which is also used on the system only boilers.

bleed the system,sounds like an airlock issue

Hello
The operating pressure should be between 12 and 15 psi.It may go up some while in operation.

A pressure loss indicates a leak,you may be able to find the leak by filling the boiler up to 15 to 20 psi,then running it for a while.

Once you have it running check all fittings and solder joints for water leaks,lay a white paper towell down at the radiator conection areas and see if you get any water spots.Sometimes using a soap and water solution and applying it to the joints and connections will help,if you see bubbles thats where your leak is.

You sound like you have a 2 story house,check the upstairs radiators also.

Most boiler systems have some sort of expansion tank, a pressure relief valve, auto air bleeder vent device and auto fill connection (with a pressure reducer). I would have to hav a schematic of your system to give you specific instructions. The expansion tank will have an air side and a water side, I guess yours does not have a level gauge.

You could connect a water supply low near the expansion tank or pump inlet...throttle open the bleeder at the top level and fill until you get a solid stream of water out of the system. If your water supply is less than 40 psi, you should have no issues with over pressurizing the system.

I hope this helps.

you will find two black handle iso valves by the pressure gauge at the base of boiler turn both valves so that the handles are inline with pipe work and this will fill the system only fill to 1 to 1.5 bar standing pressure

on the pipework below there may be a silver braided hose with one or two valves on the end. turn the valve(s) so the handle is inline with the pipe this will allow water from the mains supply into the heating circuit , remember to keep an eye on the pressure gauge. fill the system to 1bar cold then shut down the valve(s). turn on the boiler and it should be ok, if you lose pressure again then you may have a leak somewhere which needs to be found.

Here is a link to the manual.It shows fault codes.
http://www.ferroli.co.uk/Product_Documentation/Domestic/Optimax_HE_31_C_Manual.pdf

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