The property is a detached 2 storey 5 bedroom domestic dwelling with two ensuites, main bathroom, kitchen and utilities. Fuel natural gas.
Design help required.
- Thread starter PrenticeBoyofDerry
- Start date
The property is a detached 2 storey 5 bedroom domestic dwelling with two ensuites, main bathroom, kitchen and utilities. Fuel natural gas.
No, you use the cascade system, which is a control method, and connect it to a LLH, which joins all the circuits and boilers together correctly
You sound like you're waaaaaaaaaaaay out of your depth with this one I'm afraid
A
ALEC1
LOL..
cascading is just two boilers being set up to operate as the installer intends.. it can be done several ways with varying degrees of sophistication, the most sophisticated running two boilers at 1/3 of their outputs as thats when they are most efficient if the demanded load required it.. granted you would be varying the flow temp(s) with compensation controls.
cascading is just two boilers being set up to operate as the installer intends.. it can be done several ways with varying degrees of sophistication, the most sophisticated running two boilers at 1/3 of their outputs as thats when they are most efficient if the demanded load required it.. granted you would be varying the flow temp(s) with compensation controls.
I should mention this is an on paper design, just so I can get my head around varying systems and the workings of them and how certain scenarios are achieved. So very much a fictional design but wanted to know how it would be put together in reality. It is an old assignment paper I am browsing over.
Or single boiler with fixed rate firing connected to a buffer cylinder....
http://tinyurl.com/lvo78nx
Will be more efficient than a modulating boiler/s imo.
Most integrated boiler controls are fairly crappy compared to something like the above.
Controller behind the scenes....
http://tinyurl.com/no4v22s
Front view...
http://tinyurl.com/ow26ppx
http://tinyurl.com/lvo78nx
Will be more efficient than a modulating boiler/s imo.
Most integrated boiler controls are fairly crappy compared to something like the above.
Controller behind the scenes....
http://tinyurl.com/no4v22s
Front view...
http://tinyurl.com/ow26ppx
While I think your assessment of 3KW for HW is shy, I think you'd be amazed how little energy is used in a 5 Bedroom house. Of course it depends on floor area & lifestyle.
My guess is a property of that nature could operate on a relatively low heating mean water temperature, with two zones of oversized radiators & UFH. The HW would be the only thing requiring high temperatures.
With my Contractor's Estimator's head on, in a competitive tender environment, only one boiler would be installed, with the minimum of controls. It's only a domestic dwelling after all!!
All these over engineered controls would be a waste of money, with a very poor return on investment. KISS!!
I can do simple.....
http://tinyurl.com/puo5c2g
Note the 35mm copper I pulled on an A frame! You'd have your discs shot out on that sir dickie.
With the soaring price of fossil fuels those top notch controllers pay for them selves in no time imo.
Plus the client knows knows he has a top notch installation by employing a controls engineer instead of having it skrewed up by the electrician or the plumber.
http://tinyurl.com/puo5c2g
Note the 35mm copper I pulled on an A frame! You'd have your discs shot out on that sir dickie.
With the soaring price of fossil fuels those top notch controllers pay for them selves in no time imo.
Plus the client knows knows he has a top notch installation by employing a controls engineer instead of having it skrewed up by the electrician or the plumber.
Which calculator did you use to size the rads/UFH?
Have you checked the 42kW against the Whole House Boiler Size Calculator?
A
ALEC1
Nicely put Norcon...buy a viessmann vitodens 200 with the vitotronic 200, or a vaillant with their 470 controllers you are getting something that works seamlessly and reliably with the boiler(s) its integrated heating at its best. In fact the installation cannot be bettered in terms of enhancing energy efficiency...
Its not that they are over engineered, they are fit for purpose with people who find them complicated not aware of the benefits...mind I must say the manufacturers do little to promote understanding of them..
Its not that they are over engineered, they are fit for purpose with people who find them complicated not aware of the benefits...mind I must say the manufacturers do little to promote understanding of them..
I can do simple.....
http://tinyurl.com/puo5c2g
Note the 35mm copper I pulled on an A frame! You'd have your discs shot out on that sir dickie.
With the soaring price of fossil fuels those top notch controllers pay for them selves in no time imo.
Plus the client knows knows he has a top notch installation by employing a controls engineer instead of having it skrewed up by the electrician or the plumber.
35mm copper tube bends are pulled on a ratchet bender on commercial jobs dear boy!! Do you 'washer changers' not have one of these???......
Jesus, how much ptfe did you get through?.... I hope those tee's were brazed with those scorch marks,.
Looks rough.
Anyway, not that I rate the whole house method much, I agree 42kw sounds incredibly over sized.
In fact, looking at it, couldn't you be bothered to measure those bends?
*edit for typos and final shot.
Looks rough.
Anyway, not that I rate the whole house method much, I agree 42kw sounds incredibly over sized.
In fact, looking at it, couldn't you be bothered to measure those bends?
*edit for typos and final shot.
"Looks rough."
A bit like your work then.
Yeah that was rothenberger T'ing gear and brazing. Not that you would have the equipment like that in your manky sack cloth tool bag full of rusty footprints.
(Edited for return shot)
" I agree 42kw sounds incredibly over sized."
Its a paper exercise thus it cannot be undersized. Not unless its one of your council estate hovels where they keep the windows open to let the smells out.
A bit like your work then.
Yeah that was rothenberger T'ing gear and brazing. Not that you would have the equipment like that in your manky sack cloth tool bag full of rusty footprints.
(Edited for return shot)
" I agree 42kw sounds incredibly over sized."
Its a paper exercise thus it cannot be undersized. Not unless its one of your council estate hovels where they keep the windows open to let the smells out.
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