cold rad

[emmkat]

after changing towel rail for a tall vertical rad,i am having trouble getting heat to it. i managed to get it hot when i forced off all other rads but it wont get hot with the others turned on. it is the first rad fed before the 3 way port. i have bled several tubs of water from the bleed valve and it gets warm but as soon as i stop it goes cold again.

 

[calorific]

Sounds like a blockage on one of the pipes or valves (possibly an airlock along the leg leading to the main flow or return pipe). Try closing one valve and bleeding it again then repeat the process with the other valve.

 

[yerino]

Sounds like you have a 'balancing' problem.

 

[Terry lambert]

Your not going to achieve much by keep bleeding it.

If it gets hot with other rads shut, I would say balancing problem.

If you suspect a blockage, shut the valves, put a half inch male iron to compression with a bit of copper, put in place of the blank or bleed nut on top,

Run hose from copper to toilet.

Now open one valve and see what happens then close, then the other.

This will often shift a blockage or tell you whether there is a circulation problem

 

[picasso]

make sure you havent got it upside down or back to front, some vertical rads have baffles that only work when the rad is installed properly.

 

[emmkat]

thanx will try all suggestions

 

[emmkat]

make sure you havent got it upside down or back to front, some vertical rads have baffles that only work when the rad is installed properly.

it already came with blank and bleed cap fitted

 

[picasso]

but is the flow and return on the right way ? (read the instructions it only matters on some of them)

 

[emmkat]

but is the flow and return on the right way ? (read the instructions it only matters on some of them)

it must be because there isnt a back to front theres only 1 flat surface side

 

[picasso]

last try IF there is a baffle inside the radiator then it will matter which way the flow and return are connected, if you get them the wrong way round the flow through the rad will be poor,

there are some vertical rads where this is not an issue, yours might be one of them.

 

[Terry lambert]

I don't think your being very clear Picasso, I'm still a little mmm confused