Central heating

[nysk2008]

I know this post relates to heating and not gas but I prefer the quality of answers I get in here.

Was at a job today and customer has a worcester 30si (rebadged as British Gas) What I had to do was drain down and basically extend the ch pipework up and back down (basically creating a lovely place for air to trap) so the chippies can put new joists in and stuff. Now there are to bottle air vents that are broken so nowhere really to let the air our (cant get it all out from the rads as the install is a shower of you know what.

I refilled and the return on the boiler getting hot but flow seemed cold. I have only run these loops in poly pipe as they are coming out in a week or so and am then re-doing it in copper. Can I assume air locks in a big way on this - when I redo the copper I am going to put in new thumb screw vents or could it be something else?

 

[AWheating]

was the heating/boiler working fine before you altered the pipework? i would have dropped a couple of thumb vents in to vent before running the heating, once the air is out the system should run ok.

 

[nysk2008]

cheers AW, I didnt check the heating first of all (school boy error I know), seems like air to me and cant think of anything else - appreciate your thoughts

 

[AWheating]

ive done it myself in the past but now before i touch an appliance i check its working as its not uncommon to be called to do work and not be told of problems by the customer. i serviced a back boiler when i was younger for a friends mother didnt tell me till it was in bits that it had not worked for a few years...... mothers.

 

[mikeygas]

If the flow is cold sound's like trapped air in the heat ex. Try bleeding the pump first.