Pressurisation unit

[Lukeions]

Hi, I'm new to the forum and wondered if anyone could help?
why use a pressurisation unit? Surely there is a fault if your pressure keeps dropping!

 

[jtsplumbing]

Can you explain what you mean by a pressurisation unit ?? are you talking about pressure dropping on a boiler ??

 

[Ch4 plumbing]

They are usually used on large commercial jobs, Heating system that have lots of AAV's can lose pressure frequently even if their isn't any leaks.

 

[ShaunCorbs]

Can you explain what you mean by a pressurisation unit ?? are you talking about pressure dropping on a boiler ??

no tops up the pressure on a big system

left hand side with two black flex conds

 

[Dotty]

Ah. That'll be a Hoval using the Flamco architecture.

You got both codes for that Shaun?

 

[Dotty]

Some fall on that Flue too. Don't like the copper drains.

 

[ShaunCorbs]

Not my install and there's a few more faults like undersized pipe work 😀 and codes cropp?? Fault codes ?

Was done by a Dom plumber 😀

 

[jtsplumbing]

Could be at crossed meanings OP didn't say if it was Domestic or larger installation

 

[Lukeions]

They are usually used on large commercial jobs, Heating system that have lots of AAV's can lose pressure frequently even if their isn't any leaks.

Ok, I understand that on larger systems there is more air but once it's out surely the unit unnecessary?
Thanks for reply btw!
just trying to get my head round if they're really that essential to have!

 

[Dotty]

Absolutely in larger installations!

You're aware of the natural water losses in a domestic installation? Even the best installed and maintained system needs topped up now and again. Now imagine that system 20-30 times larger, with increased opportunities for losses. And no one willing to take responsibility to monitor and top up as required.

Now, I know you're thinking that should there be a major leak the unit would permanently run. Not the case, most units now come with a flood limit meaning that if it ran for a set period of time, including low water moments whilst the break tank refills, it would stop and flash up a flood alarm.

Shaun, operators and engineers codes to get in, interrogate and check settings,

 

[gasmanrob]

Anything over 40kw should have one at least that's my understanding.

All It is, is a monitoring device that tops up and accounts for losses that occur in a system. There is a low setting and a peak setting. Too low and it will top up too high and it will shut down (if it's linked with a bms system) you the engineer can adjust its low and peak settings and also its maximum volume or run period.

If exceeded it will alarm and give excessive start warnings indicating a possible fault ie a leak.

Simple bits of kit in theory but when someone dicks around with the settings it'll cause Mary hell!

 

[ShaunCorbs]

Absolutely in larger installations!

You're aware of the natural water losses in a domestic installation? Even the best installed and maintained system needs topped up now and again. Now imagine that system 20-30 times larger, with increased opportunities for losses. And no one willing to take responsibility to monitor and top up as required.

Now, I know you're thinking that should there be a major leak the unit would permanently run. Not the case, most units now come with a flood limit meaning that if it ran for a set period of time, including low water moments whilst the break tank refills, it would stop and flash up a flood alarm.

Shaun, operators and engineers codes to get in, interrogate and check settings,

that would be great if you had some, always handy to have like the fault codes for viessmann 😀 they dont print them in there books

and op i cant anything to what the guys have said above very good brief on what they do/for

 

[Lukeions]

I agree, Much appreciated for your knowledge guys! I certainly understand their purpose a lot better!

 

[missplumb]

Most water authorities require pressurisation units be fitted to systems above 45kw.
I'm not fussed on the flamco units as we've had loads of pump failures which if connected to the fault alarm cut off, becomes quite a problem with biomass boilers.

 

[gasmanrob]

I like the Armstrong units although I've only ever fitted the big beastie

 

[missplumb]

We now use the mikrofill efd unit.

 

[ShaunCorbs]

I like the Armstrong units although I've only ever fitted the big beastie

thats the big red box one right?????

 

[snowhead]

that would be great if you had some, always handy to have like the fault codes for viessmann 😀 they dont print them in there books

and op i cant anything to what the guys have said above very good brief on what they do/for

If that's a Boss unit in the picture the instructions are folded up very neatly and tucked in a slot under the display, if I remember.
if not they're here;
http://tpssprod.blob.core.windows.n...Document 14 - BOSS™ Pressurisation Manual.pdf