owenm said:Which side of the rad should the TRV be on ? Without TRV's the on off valve side is irrelevant but with TRV's it becomes important I think??
i.e. TRV on Return or inlet side?
Tks,
bMino said:Hi - I will be doing this soon but have no plumbing experience so sorry in advance for the stupid questions.
Where is the Draincock located......is it on the Radiator ? And how do you turn off the water going into the system ? Is it by using the regular off and on connection on the radiator.
If I turn off boiler, turn off the radiator with the connection on the side, drain the radiator, open the bleed valves to allow air in, surely when I remove the valve water will come out of the system or how does this work ?
Do you turn off the water to the whole house before you start or drain the cold water tank in the attic ?
heinbloedA boiler that is not equipped with overheating protection is simply dangerous and illegal said:Solid fuel heating systems are like this, not illegal, infact very common. One rad should be left open at all times, so should not be fitted with a TRV.
heinbloed said:True , Nialla, I didn't cosider the "gun pipe above the open fire" to be a central heating boiler. Modern solid fuel boilers (those that are build within the last thirty or forty years) come with overheating protection, as much as gas or oil boilers.
Even the old backboilers have an overheating protection, the expansion tank. Leaving a radiator open is no safe overheating protection. A radiator would deliver/let out only a certain amount of energy. If the backboiler produces more heat than the open radiator lets out we would be where we started - without a safety rope. Therefore the expansion tank is attached to the open backboiler system as a legal must.
If it was dangerous to run the backboiler system without a valve open on one radiator then there shouldn't be a valve fitted to at least one radiator.To avoid accidents.This legislation-that one radiator should be without a valve- does not exist. Because it is not necessary. The safety aspect is fully covered by the expansion tank.
So there is no need to keep a radiator without a (thermostatic)valve.No matter what boiler is delivering the energy.
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