quick question gravity circulation

straideman

hi all,,,,normally when i do a stove,,when i take the 3/4 inch rad circuit off the primary 1" ,,i take the two 3/4 inch pipes down the way and then off to the rads and via pump with stat,,,the reason why is that if i keep them staight or riseing etc and then off to the rads upstairs etc,,,i feel the riseing pipework would take alot of the heat off the coil and circulate upstairs,,,taking the pump longer to kick in etc,,,

so now as i stated earlier,i tend to go down first and then away to up and downstairs rads etc

would you agree with me doing this way,,,,letting the coil and the boiler in the in the stove get good circulation(heat) build up before boosting it away

i suppose other people have other ways but i think my way is fine,,,wat you think

corkgsxr

Dropping down to break the gravity to the rads?

Couldnt fault that

straideman

im only doing it to let the coil and stove gett better so the stat will get to temp quicker and kick the pump in,,,seriously i offen wondered about that

are you serious in saying what i am doin g is fine,,,seems to work well when i do it,,,

corkgsxr wrote: »

Dropping down to break the gravity to the rads?

Couldnt fault that

corkgsxr

Means no heat goes to the rads untill pump kicks in. Heat will keep going where you want it to

sanbrafyffe

i dont see any problem with the way this guy does it.the pump will deliver it quickly when it told do so by the stat.he is just quizative thats all

corkgsxr wrote: »

Means no heat goes to the rads untill pump kicks in. Heat will keep going where you want it to

straideman

is this ok the way i am doing it,,,what way would you do it for example

corkgsxr wrote: »

Means no heat goes to the rads untill pump kicks in. Heat will keep going where you want it to

shane0007

straideman wrote: »

is this ok the way i am doing it,,,what way would you do it for example

It won't make a blind bit of difference. There will be no gravity flow to the rads anyhow & the only way to encourage more heat to the cylinder is an injector tee.

freddyuk

I thought the injector T stopped the "bypass" flow from returning into the cyclinder and cooling the cylinder down instead of the flow going back through the boiler return. So if there is no injector T the system is no good anyway?

sanbrafyffe

mate,the way you do it urself is fine,,keep the pipe to the coil riseing and t awy for ur rad circuit,,go up or down,,aslong as u have a good pump,,,linked to ur stat,,,it will work away,,oh and have a good fire to keep it fireing:D,,,as shane said it makes no difference

shane0007

freddyuk wrote: »

I thought the injector T stopped the "bypass" flow from returning into the cyclinder and cooling the cylinder down instead of the flow going back through the boiler return. So if there is no injector T the system is no good anyway?

Injector tees are used to increase the flow to the cylinder. As the rad circuit is pumped, it can pull all the heat from the primary circuit into the secondary circuit thus not allowing any heat flow through to the coil. By installing an injector tee, it encourages flow to both.
By not installing an injector tee, it is not wrong, but depending on the parameters of the installation, it can lead to issues with low hot water temps. The cylinder will creep heat whilst the pump is between cycles.
A simple inexpensive solution is a self made injector tee with copper insert soldered into the fitting, otherwise purchased ones are very expensive.

paddy_joe

shane0007 wrote: »

Injector tees are used to increase the flow to the cylinder. As the rad circuit is pumped, it can pull all the heat from the primary circuit into the secondary circuit thus not allowing any heat flow through to the coil. By installing an injector tee, it encourages flow to both.
By not installing an injector tee, it is not wrong, but depending on the parameters of the installation, it can lead to issues with low hot water temps. The cylinder will creep heat whilst the pump is between cycles.
A simple inexpensive solution is a self made injector tee with copper insert soldered into the fitting, otherwise purchased ones are very expensive.

Had never taught of making up one, always bought them. Thanks for tip Shane

Dtp79

paddy_joe wrote: »

Had never taught of making up one, always bought them. Thanks for tip Shane

Never bought one always made them!