cold and hot radiators


Postby Gibbsy » Fri Dec 05, 2008 7:22 pm

Please bear with me as this is my first post.
Firstly i have a Worcester Greenstar HE combi boiler with a Siemens RDJ10 room thermostat fitted the boiler was serviced this summer and the thermostat was fitted new tonight. I have 4 rads upstairs and 5 downstairs. All have TRVs except the lounge and dinning room.
The problem i have is that the system doesnt seem to be able to cope with heating all the rads at once even though when fitted some 6 yrs ago it was great. Now i dont have the bedrooms heated but it still struggles to heat the remaining rads. Now if i turn on one or two of the bedroom rads just onto freeze protection the dinning room and bathroom go cold.
One thing i have noticed and the reason i bought a new room thermostat was the boiler when heating the house keeps switching off when it gets to a certain temp then back on again when the temp drops to a certain level. Is this normal even though the room thermostat is asking for more heat?
I really hope someone can help as it is sending me up the wall

Thanks
Gibbsy
Rank: Labourer
Progress to next rank:
75%
Posts: 4
Joined: Fri Dec 05, 2008 6:59 pm

Sponsor

Simply Build It

Postby Steve the gas » Sat Dec 06, 2008 5:00 am

Hi Gibbsy,

What is the pressure reading on the gauge??
Do you have any other contraptions fitted to the system.
You say sealed, but do you have a copper cylinder etc.
As you can see -- need more total info
Steve the gas
Rank: Site Agent
Progress to next rank:
56%
Posts: 780
Joined: Sun May 04, 2008 7:07 am

Postby Gibbsy » Sat Dec 06, 2008 3:30 pm

Hi steve

The pressure gauge is reading just above 1 bar, there is nothing else fitted apart from the room therm which i mentioned and i dont have a copper cylinder fitted.
It is just the boiler and 8 rads in a 3 bed semi to heat the house and provide hot water.
Gibbsy
Rank: Labourer
Progress to next rank:
75%
Posts: 4
Joined: Fri Dec 05, 2008 6:59 pm

Postby Baltic » Sun Dec 07, 2008 10:01 pm

Has anyone been fiddling with the lockshield valves (the "tap" at the outlet side of each radiator). Sounds like the radiators are out of balance. See this article to sort or google "balancing central heating".
Baltic
Rank: Labourer
Progress to next rank:
0%
Posts: 1
Joined: Sun Dec 07, 2008 9:44 pm

Postby Gibbsy » Thu Dec 11, 2008 2:39 pm

Thanks for the tip it seems that all the lockshield valves were wide open and so putting the whole system out of balance. Just when i thought it was sorted i got home last night and the bathroom radiator was stone cold after it had been fine for days, any ideas anybody.

Thanks for all the help so far.

Gibbsy
Gibbsy
Rank: Labourer
Progress to next rank:
75%
Posts: 4
Joined: Fri Dec 05, 2008 6:59 pm

Postby Steve the gas » Thu Dec 11, 2008 3:20 pm

Do you live in a hard water area?
Could be scaled up in the boiler etc
Poss drain down > cleaner for time spec> drain again> inhibitor.
Steve the gas
Rank: Site Agent
Progress to next rank:
56%
Posts: 780
Joined: Sun May 04, 2008 7:07 am

Postby Gibbsy » Fri Dec 12, 2008 11:30 am

Hi Steve,

I dont live in a hard water area but i think i will go with your idea anyway as it has never been done in the last 6 yrs since the system was fitted and only then had the rads and boiler fitted as new all the old pipe work remained.
So maybe its time to give it a little TLC.

Thanks for the reply will let you know the out come.

Cheers

Gibbsy
Gibbsy
Rank: Labourer
Progress to next rank:
75%
Posts: 4
Joined: Fri Dec 05, 2008 6:59 pm

Display posts from previous
Sort by
Order by



  • DIY How to Project Guides

  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!



 


  • Related Topics