New Central Heating System-is it air?

Question

Recently had a full heating system put in, oil boiler, vented system, rads upstairs, UFH downstairs. 

System is losing pressure, plumbers have come back once and vented it and reset everything, a week later no pressure again. 

I have topped it up from filling loop, bled all rads. UFH is working fine. 

Can’t see any leaks, when I was filling up PRV was releasing air, but now I am stuck.

Rads cold, slightly luke warm hot water, plumbers say air just needs to work its way through system. 

Any help to either push air quickly or get some heat into rads would be greatly appreciated

Brad · Accepted Answer

Hi Pete does the system have automatic air valves fitted ? At high. Level ? Might be worth while getting a couple fitted on pipework where possible would help to speed things up thanks

Scott · Answer

Is the PRV fully closing also try shutting all rads off leave 1 open once hot then open another ect see if that helps

Lee · Answer

Hi Pete,

Sorry to here this but try the  prv  it could be letting by
Hence the reason you keep losing pressure and it’s 
not visable  only when you discharge it  manually.
Hope this helps out

Regards 
Lee

New Central Heating System-is it air?

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