Central Heating Issue

[TeamJLR]

I'm converting a large workshop and garage that's attached to my house and am having issues with the heating system.

I've tee'd to to both pipes below an existing radiator on the original house and run the pipes as 2 x 15mm plastic barrier pipe, when i've got these pipes through the wall and in to the workshop (new bathroom) i've just connected them together to complete the run whilst i install radiators and to check the water flows, however it doesn't.

The existing house is served by 2 heating pumps as it got a lot of radiators so there should be plenty of pressure in the pumps, i've made sure that there is no air in the new pipes and all the radiators still work in the original house.

Can anyone offer any suggestions ? Someone mentioned a "Comfort Pump" but i cannot see these anywhere on the internet

 

[Boilerman2]

Have you teed into a single pipe heating system, if you have, it will not circulate!! check to see how your existing system is installed 1 pipe or 2 pipe??

 

[bengasman]

... i've just connected them together to complete the run whilst i install radiators

Why?

 

[TeamJLR]

... i've just connected them together to complete the run whilst i install radiators

Why?

I did it to see if the flow went through the pipes and they got hot before i box them in as they run through a barn conversion as this was the easiest way to run the pipes and didn't want to have to rip boxing off when i found out it didn't work

 

[TeamJLR]

Have you teed into a single pipe heating system, if you have, it will not circulate!! check to see how your existing system is installed 1 pipe or 2 pipe??

This being the first time i've ever messed about with heating i'm not sure, how would i know ? Where i've tee'd in the the pipes the feed to the poriginal radiator the pies are in a plasterboard wall so it's not really as though i can see what's going on.

Is a single pipe system basically like a loop where the water passes through the first radiator and on to the next rather than returning to say a 22mm pipe under the floor where it's tee'd in to and this beiong a 2 pipe system ?

If it is a single pipe system would putting a new small pump in the extension pull the water through ?

 

[bengasman]

Boxing in is normally done AFTER the installation is completed and tested. Not much point in testing pipework before the rads are working.

 

[Agile]

What is the power of the rads you want to fit there?

What is the total length of 15 mm pipe? ( Total means there and back! )

Tony

 

[TeamJLR]

What is the power of the rads you want to fit there?

What is the total length of 15 mm pipe? ( Total means there and back! )

Tony

not thought about rads yet but pipe run will be about 50 to 75m total run

 

[Jordon]

Probably a air lock on the return turn all the rads off and hotwater if you have a cylinder (hot water off on time clock) if it is a lock this should shift it and should flow fine. Only concern is the length of the run on a 15mm pipe from a radiator mega balancing issues i see in the future when connecting the rads, be better on a 22mm flow and return from the main run of the house. Oh and a pump is a cuircualtor not a booster and water is lazy and will take the quickest route hence balancing issues

 

[Agile]

When you design a heating system you work out the heat losses and choose suitable size radiators.

Then you work out the size of pipes required to provide the power over the distance involved.

You dont seem to have followed any of the normal processes that a heating engineer would use.

Tony