Finding the order in which radiators heat up

[Pisces67]

In order to find out the order in which radiators in the house heat up, would be possible to time the point at which heat is detected through either the flow or ruturn pipe on the radiator?

 

[Chuck]

In order to find out the order in which radiators in the house heat up, would be possible to time the point at which heat is detected through either the flow or ruturn pipe on the radiator?

If you have a two-pipe system that's been correctly sized they'll probably all come on with relatively little delay and you won't get much useful information.

If you are trying to trace pipework hidden behind/under expensive finishes I'd suggest you'll have better luck and more reliable results with a thermal camera (turn the flow temperature up to 11) and an endoscope.

 

[Pisces67]

If you have a two-pipe system that's been correctly sized they'll probably all come on with relatively little delay and you won't get much useful information.

If you are trying to trace pipework hidden behind/under expensive finishes I'd suggest you'll have better luck and more reliable results with a thermal camera (turn the flow temperature up to 11) and an endoscope.

Its for balancing purposes. Instead of running around the house trying to find out which rad is heating up first, second etc I thought it would be simiar in principle if I timed each one. Then put the times in order

 

[Chuck]

Its for balancing purposes. Instead of running around the house trying to find out which rad is heating up first, second etc I thought it would be simiar in principle if I timed each one. Then put the times in order

It is similar in principle. In practice, unless you have bribed half a dozen kids to sit with their thumbs on the flow pipe in each room and shout out when it gets hot it'll be quite difficult to measure the times reliably enough to be sure you've got the order right.

OTOH, it's probably not that critical to get the order exactly right anyway.

 

[Pisces67]

It is similar in principle. In practice, unless you have bribed half a dozen kids to sit with their thumbs on the flow pipe in each room and shout out when it gets hot it'll be quite difficult to measure the times reliably enough to be sure you've got the order right.

OTOH, it's probably not that critical to get the order exactly right anyway.

Hi thanks

It is similar in principle. In practice, unless you have bribed half a dozen kids to sit with their thumbs on the flow pipe in each room and shout out when it gets hot it'll be quite difficult to measure the times reliably enough to be sure you've got the order right.

OTOH, it's probably not that critical to get the order exactly right anyway.

Hi thanks, but found that all or most of the rads warmed up evenly. My issue is a myson kickspace plinth heater, return flow flexi completely blocked. Took it apart and cleaned through the flow and return flexis of the plinth heater.
Added some sentinel x400 to the system and ran the heating. Unfortunately the copper flow and return to the flexis are stone cold, but the rest of the house rads are working fine.
Any ideas, have bled the system. Will be draining the system agsin in a week to remove the cleaner x400 and add inhibitor.

But need urgent help to find why the supply pipe to the plinth heater is not warming up
Thanks

 

[exedon2]

Are you certain the plinth heater itself is not blocked?
If you have service valves on heater take heater out and see if you have flow out of valves.

 

[Pisces67]

Are you certain the plinth heater itself is not blocked?
If you have service valves on heater take heater out and see if you have flow out of valves.

Washed it out thoroughly, however dient explain why the supply isn't getting to it, as it did before very hot but the return was blocked hence the draing and cleaning of the system including flexis.
The glow from the remaing ch should be reaching the plinth heater at least as before

 

[Pisces67]

Completely baffling, because the supply is part of the general ch system

 

[exedon2]

Have you tried running heating with nothing but to plinth heater on?

 

[Pisces67]

No not yet, would that mean turning all trvs and lockshield valves off on All the remaining radiators first or should I Do that whilst the heating is on, one by one?

Thank you

 

[exedon2]

Just run heating and turn off trvs one by one hopefully to force heat round the bit that won't work.

 

[Pisces67]

And What about the lockshield, closed or open?

 

[exedon2]

You only need to turn of one valve each radiator so trvs only

 

[Pisces67]

Are you certain the plinth heater itself is not blocked?
If you have service valves on heater take heater out and see if you have flow out of valves.

You only need to turn of one valve each radiator so trvs only

OK will try that. Is it worth leaving the lockshield positions as as they are (different settings) or should I open them all fully?

 

[exedon2]

Just leave them as they are

 

[Pisces67]

OK thanks, will try tomoorow, especially now the beast from the east is on its way.
Will report the results after completing the exercise.

 

[Pisces67]

Guys, did what you said and plinth now blowing hot air. Before I switch off should I be doing any more bleeding and how should I turn up the trvs gradually or all at once. Just conscience of all the oresdure on one plinth heater. Thank you

 

[exedon2]

Just turn them all back on
You may well have to do same again when you drain down and refill.
Should be no need to bleed rads unless they are cool at top.

 

[Pisces67]

Just turn them all back on
You may well have to do same again when you drain down and refill.
Should be no need to bleed rads unless they are cool at top.

What was the reason behind the cause if it wasn't air, so I know for next time, thanks

 

[exedon2]

Who knows! air probably you now now how to clear if if needed next time

 

[Pisces67]

Who knows! air probably you now now how to clear if if needed next time

Thanks very much.

Regarding the final flush next week is it worth draining the system whilst the heating is on, with all valves (trvs and lockshields) fully open and toppingi up/maintain the water pressure to the boiler with the filling loop?

 

[Pisces67]

Thanks very much.

Regarding the final flush next week is it worth draining the system whilst the heating is on, with all valves (trvs and lockshields) fully open and toppingi up/maintain the water pressure to the boiler with the filling loop?

Hi can anyone confirm if the above would work?