Thermal Store

Wigster

Hi all,

Has anyone out there installed a Thermal Store cyclinder (vented pressurised system) and are there any suppliers in Ireland.

ircoha

Wigster wrote:

Hi all,

Has anyone out there installed a Thermal Store cyclinder (vented pressurised system) and are there any suppliers in Ireland.

Vented pressurised? are u sure.

Looked at site http://www.rayotec.com/htm/underfloor_heating/triple-tube/boilers.htm

Hot water is provided at 5 GPM at 500C at 3-bar pressure (standard thermal store at 70ºC cylinder temperature) from the top multi coil.

500c: thats hot, man:eek:

Wigster

ircoha,

I am in the process of instaling a pressurised cyclinder. I like the idea of a thermal store as it does not need all of the safety devices as in an unvented pressurised system. Have a look at this website.

http://www.heatweb.com/

Wigster

Wigster wrote:

ircoha,

I am in the process of instaling a pressurised cyclinder. I like the idea of a thermal store as it does not need all of the safety devices as in an unvented pressurised system. Have a look at this website.

http://www.heatweb.com/

I have just ordered one of their thermal stores, expecting delivery in four weeks or so, watch this space;)

Wigster

dolanbaker,

What size cyclinder did you buy? Is delivery to Ireland costly?

ircoha

Thanks guys,
had a look at the website.
Must confess all new to me and I dont u/std the detail, which I would like to so would appreciate any help, as I think would some other members.

The overall concept is as follows, correct me if wrong.

1 U heat an insulated, vented, unpressurised cylinder say with a gas boiler.
[I presume the heating is direct, as opposed to indirect]

2 The cylinder has a coil in it which is used to feed a plate heat exchanger [PHE] and the rising main passes through the PHE to give hot water.
The heat source for the PHE is the hot water in the cylinder, so u could say the system is the reverse of the ordinary indirect cylinder system.

The main advantage seems to be that in the UK u need "approval" of some sort to install a pressurised HW cylinder so this gets over that problem.

One that confuses me is how do u intend getting the pressure?

There seem to be three main options
a: use the rising main as is.
b: pressurise the rising main. **
c: pressurise a feed from the usual cold water tank in the attic.

** AFAIK, at least in Fingal CoCo, pressurising the rising main is not permitted.

Would be nice to know exactly what yee are ordering

Wigster

Wigster wrote:

dolanbaker,

What size cyclinder did you buy? Is delivery to Ireland costly?

I am getting a 250 litre unit with 160Kw plate heat exchanger, UFH mixer and hot water circulator pump.

£1350 inc delivery (aint cheap just hope its worth it)

Wigster

ircoha

the pressure is dependant on your rising main. Its no different to any pressurised system so a pumped reserve is required. I still have not decided if I will go with this or not. I like the idea if the system not under pressure.

ircoha

Wigster wrote:

ircoha

the pressure is dependant on your rising main. okay so if ur rising main is off u have no hot water/ here in Fingal we have regular water outages so it would not work for meIts no different to any pressurised system its very different to my pressurised system so a pumped reserve is required.
I dont understand what you mean by a pumped reserve

I still have not decided if I will go with this or not. I like the idea if the system not under pressure.

See above

Wigster

If one does not have enough pressure in their well/ mains a reserve tank with a pump supplying water at 3 bar to your pressurised cylinder!

ircoha

ircoha wrote:

Thanks guys,
had a look at the website.
Must confess all new to me and I dont u/std the detail, which I would like to so would appreciate any help, as I think would some other members.

The overall concept is as follows, correct me if wrong.

1 U heat an insulated, vented, unpressurised cylinder say with a gas boiler.
[I presume the heating is direct, as opposed to indirect] yes it's direct, but you have the option of a coil for solid fuel or other boiler type.

2 The cylinder has a coil in it which is used to feed a plate heat exchanger [PHE] and the rising main passes through the PHE to give hot water.
The heat source for the PHE is the hot water in the cylinder, so u could say the system is the reverse of the ordinary indirect cylinder system.

The main advantage seems to be that in the UK u need "approval" of some sort to install a pressurised HW cylinder so this gets over that problem.yes that's correct, with the heatbank you have no closed & pressurised unvented loops.

One that confuses me is how do u intend getting the pressure?

There seem to be three main options
a: use the rising main as is. you can all in what is called a cold water accumulator , it doesn't raise the pressure but maintains the flow until empty, I am getting one of these for my system
b: pressurise the rising main. **
c: pressurise a feed from the usual cold water tank in the attic.

** AFAIK, at least in Fingal CoCo, pressurising the rising main is not permitted.

Would be nice to know exactly what yee are ordering

.