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Ferroli Optima 701 - Pressure Relief Valve passing?

View the thread, titled "Ferroli Optima 701 - Pressure Relief Valve passing?" which is posted in UK Plumbers Forums on UK Plumbers Forums.

Hi All

I have a Ferroli 701 Optima which leaks water through its CH 3 bar safety pressure relief valve. The water pressure on gauge NEVER goes above 1.2 bar though (with CH on or off). When i do put pressure in the PRV passes and it drop to zero over 10mins.

The Pressure Gauge USED to go over 3 bar a few weeks ago but is as above now?

There are NO leaks on the system.

I have had the filling loop on constantly to keep pressure on, boiler to work.

I then replaced the PRV and it's still the same...(i also tested the old one as it was working fine)

I am now thinking it may be the expansion vessel (i presumed it never had one as it's states optional on the PDF and shows to the side of the boiler/rectangular) BUT i have since found out it is round and at rear at boiler and i can get access to the schrader valve.

I pressed in the centre bit and NO air or water (thank god) came out, this at at 1.2 bar (which as i stated it NEVER goes above?)

It looks like the XV needs to be at around 1 bar/25 psi, the ONLY pump i have though is a bike higher pressure track/floor pump for my racer (160psi).

What should i do next, i did put the pump on XV whilst it was at 1.2 bar and pressure did increase, giving and good indication that the XV balloon is OK.......?

I am thinking of draining a few litres out of the system and then trying to pump to 1 bar but it will be VERY roughly around that mark due to pump..(i'm not paying £35 for a proper one fro vessels!!)

Any advice much welcome.

Cheers
 

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