RIELLO BOILERS - EXPLANING A PLANT ROOM Commercial Plumbing

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Riello Condexa Pro Twin boilers in a plant room. New central heating boiler installation in a care home. A plumber doing plumbing in a commercial boiler room. Riello gas boilers. Condexa Pro.
Outputs (kW): 35 - 131 (cascades up to 1.1MW)
MDBGAS Ltd
/ mdbgas1
The Condexa Pro is Vokèra by Riello’s range of condensing light commercial boilers. These fully modulating condensing boilers are available in 8 models (35 P, 50 P, 57 P, 70 P, 90, 100, 115 & 135), offering versatile standalone and cascading solutions to meet commercial building demands.
New condensing heat exchanger in stainless steel
Complete pre-mix combustion and low NOx emissions: Class 6 (EN 15502)
Possibility to cascade up to 1120kW (using the embedded ‘Managing/Dependant’ control logic)
Thanks to our embedded ‘Managing/Dependant’ control logic, any boiler can be configured either as the ‘Managing’ or as a ‘Dependant’ boiler within the cascade (same product code)
Built-in thermoregulation with external probe supplied as standard
Possibility to combine Condexa Pro boilers in linear or back-to-back cascade applications
Possibility to use either low energy pumps (also Δt logic) or 2-way valves on the primary circuit
Modulating and modular power regulation
Automatic burner ignition sequence reversal (at adjustable steps)
Simultaneous control of two different circuits: DHW tank and high temperature
Management of up to 16 zones through an optional kit
Automatic summer/winter switch-over
‘Anti-legionella’ function as standard
Suitable for remote control management (0-10V input or Modbus) via optional kit
Availability of a wide range of accessories and flue options for complete configurations
Can be converted to LPG through LPG kit supplied as standard
Multi cascade configurations possible - contact Pre Sales support team for further details
The Condexa Pro is extremely versatile and is suitable for a wide range of commercial applications, including churches, schools, offices, hotels and many more. The flexible nature of the Condexa Pro means it can easily integrate with renewable solutions to maximise energy savings. To discuss your project with Vokèra by Riello’s dedicated commercial team, email: commercial@vokera.co.uk
Our Condexa Pro models 90, 100, 115 and 135 are listed on the ECA Energy Technology List (ETL), allowing end client businesses to claim tax relief on the boiler. For more infomation, please email commercial@vokera.co.uk

Опубликовано:

15 сен 2024

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Комментарии : 87

@markrussell9719 3 года назад

More more more please Allen keep em coming. Great explanation from your colleague too. Thanks for sharing 👍

@warrenliversage2888 4 года назад

Reverse return , boiler shunt pumps, low loss header , CT for hot waters and fan coil circuits , VT for heating , the three way valve is a blending valve used for variable temperature output to the building radiator circuits controlled from a building weather management compensation and after working within commercial and industrial heating sector with 3 generations and 35 years of personal experience know plumbing and commercial heating are a separate skills The new boilers are a step in the right direction but would like to see hydraulic separation , plate exchanger to protect the new boilers from system debris to ensure the boiler manufacturer Warranty.

@johnburns4017 4 года назад

The three way valve looks like a _modulating_ valve for boiler back end protection - to prevent the boiler condensating. The modules are not condensing boilers, needing the return into them at a high temperature to prevent condensing, unlike condensing boilers. It also prevents thermal shock to the boilers when say a heating zone is up to temperature and then another zone is opened that contains cold water sending cold slug into the boiler. In short, the boiler(s) pump around in a pipe loop, directly in and out the boiler, when temperatures are OK in the loop hot water is pumped out to the zones. If water coming back into the loop from the zones is too cool, the modulating valve _mixes_ hot loop water with incoming cool water to keep the loop at a minimum temperature to protect the boiler/prevent condensation of the flue gasses. Even condensing boilers may still have back end protection as the heat Xs also operate within a temperature range, although a lot wider than non-condensers. Replacing commercial boilers is an expensive operation, so enhancing longevity is built into the system design. The 3-way valve on the calorifier is a _diverter_ valve. There are some domestic diverter valves available. Hot water is pumped into the cylinder's coil, when up to temp, the valve _diverts the hot water back to the boiler, by-passing the cylinder.

@bigbadface 4 года назад

Nothing to do with back end protection it's the wrong side of the LLH! Its a V/T ( variable temperature) circuit. The guy in the vid also calls it the primary circuit/ pumps, it's not.

@johnburns4017 4 года назад

@@bigbadface I never looked properly. You are right. Yep variable temp circuit mixing cool return water with hot water from header. The modulating valve _mixes_ the two. Yes, not primary pump. It will have back end protection to prevent condensing of some form. All I came across did. Domestic non-condensing boilers had the whole system designed to run hot to _prevent_ condensing. The heating system itself was back end protection. That is why rads were rated at 80c in with 70C out with the boiler running at 80C. Strangely most still size rads with these temps even though condensing boilers are fitted. 60C and 40C is more appropriate.

@iftakharmohammed1942 4 года назад

A great introduction to commercial sector for heating/plumbing, thanks Allen

@wrenlfc 4 года назад

Domestic work is better for me just an opinion but great videos again 👌

@warrenliversage 3 года назад

Makes me smile every time Dean needs to brush up on his ideas of how a VT circuit works.

@AllenHart999 3 года назад

Thanks for the feedback.

@MMKLYH 3 года назад

Hahahaha definitely, hes thinking of a CT circuit

@bryanbaker3361 4 года назад

Another great video Allen, some people are more comfortable than others in front of the camera, give him a break people . . . Any video you do is interesting so keep em coming

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@Sash_Window 4 года назад

Yes please! More commercial installs, love the big stuff! :)

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@yensabi 4 года назад

Nice one Allen , very interesting...👍

@GrahamNevin 9 месяцев назад

Great video well done

@petestoneman7491 3 года назад

Good stuff, clever people

@MrCamohoj 4 года назад

Really educational video on what a big percentage of jobbing plumbers find a bit daunting and mysterious . I am regularly in commercial boiler rooms and my biggest gripe is pipes aren't labelled or equipment not clearly identified and my personal one no dosing pot . More vids like this please👍

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@sydsyd 4 года назад

Amazing plant room. As always great video and explanation of components.

@AllenHart999 4 года назад

Thank you for taking the time to watch my video.

@michaelsimpson6603 4 года назад

Great to see the commercial installs, really interesting.

@Skeletoncrew46and2 4 года назад

Top drawer Allen! Great vid! Keep em coming simplified the mercy world of commercial.

@terenceoconnor1584 4 года назад

This video is excellent very complex heating system explained would be nice to see finished system when done. Thanks

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@keithjackman847 4 года назад

Keep more coming, great information videos , brilliant !!!!

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@joelcunningham2384 4 года назад

Keep the vids going i work permanently in plant rooms im static on site so its good to see different sites and variations

@johnburns4017 4 года назад

Having the cylinders DHW flow in _series_ (cold into one cylinder, hot out and into the cold tapping of the next) means one lead cylinder is used in times of low hot water demand (say at night). When the lead cylinder is up to temp a valve _diverts_ water into the secondary cylinder's coil to heat that. The lead cylinder always has priority, so if that is below DHW setpoint primary water if sent to its coil, cutting out the secondary cylinder. I did this once in a large domestic house using one 100 litre lead cylinder and one 300 litre secondary. A wall switch could bring in the secondary cylinder. They did not have to heat up 400 litres of water most of the time, reducing bills. In summer when cold water was at higher temperatures, they found only the smaller 100 litre lead cylinder was needed, as the semi combi effect took hold. Simple using off the shelf domestic controls. This can also be done with one tall cylinder with two heating coils inside, one top for quick recovery and one bottom to heat the rest. Only the top heating coil can be used switching out the bottom in low hot water demand, so only the top half is heated. Having the top coil a rapid recovery coil, means that the boilers hot water is reheating the top of the cylinder as DHW is being drawn off - in semi combi mode. Two off the shelf cylinders is usually cheaper than one custom made two coil cylinder. Also, if one cylinder needs replacing less cost.

@dabeenz1311 4 года назад

Another fantastic video Allen great to see how the commercial differs from domestic deffo more vids on commercial needed

@k20aa 4 года назад

Brillant Vid I have worked on the ideal Module boilers OMG you need to know your stuff . And yes very expensive to maintain . And if you dont service them they will bite you in the arse .

@vulcancontinental 4 года назад

Enjoyed that, I'll make sure you get some laminated cutaway images to show you just how the internals of the heat exchanger is configured as it's a twin parallel coil on outputs 57 to 135 kw, single coil 35 and 50KW modules. On the right of the gas valve is a neat feature, a flow meter, this allows the control box to adjust the flow rate through the boiler not only on flow and return sensor temperatures but quantity which makes the calculation of pump speed more precise. Thank you.

@AllenHart999 4 года назад

Working on it👍

@MrCarhoo 4 года назад

More vids like this on Allen , very interesting to have an an overall view, and your mate was like yourself at the start of your channel very awakard but your smashing it now son , been watching sense the 2.5k mark

@AllenHart999 4 года назад

james may Thank you so much. Thank you for supporting the channel.

@gasmanrus 4 года назад

Very interesting Allan! I thought the expansion vessel would’ve been a lot larger for such a big system? The principals between domestic & commercial systems do cross over quite a bit. Thanks for the video 👍🏼

@mrbaza8793 4 года назад

U kept ur word m8 🗣🔧 cheers Allen 🍻 fantastic upload n great pipe work 😍😎👍🏾 very informative 🧐

@AllenHart999 4 года назад

More to come very soon, watch this space. Thanks

@charliewillis8527 4 года назад

Nice to see the commercial work much more intreasting but i preferred it when it was all done in barrel working on the threading machine all day great fun and more skillfull

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@nemanjagradinac5419 4 года назад

Brilliant keep them coming

@AllenHart999 4 года назад

Thank you for taking the time to watch my video.

@johnburns4017 4 года назад

Yes, downward firing spiral tubed heat exchangers have many advantages. One is that the heat exchangers rarely need cleaning if at all, as the condensate washes them through. As in Allen's Baxi v W-B vid, the W-B also, as mentioned, has a similar type of heat X. The combined fan/burner, I believe Intergas use the same manufacturer, Reillo. with a scaled down version of the burner.

@rejwanali7663 4 года назад

Please keep making these video's

@johnburns4017 4 года назад

The removed ACV cylinders are a cylinder within a cylinder. The inner cylinder has the fresh water inside. The water between the two is primary water heating the inner cylinder all around it from outside in, eliminating internal heating coils. The inner cylinder is domed top and bottom with the col entering the bottom and hot out of the top - no sludge accumulate on the cylinder, which also has no cold spots. Domestic versions are available being well worth buying, being superior to others for sure. They are _very_ efficient with fast cylinder reheats. The primary water in the ACV, between the cylinders, can be used as a smallish thermal store, say supplying the rad circuit of a house. The boiler heating the ACV _only_ heats the outer part of the cylinder, giving it full flow through its heat X, all the time. Only a simple cheaper boiler is needed. The rad circuit off the ACV cylinder can be on a smart pump with TRVs on all rads and no central wall thermostat. The boiler does not cycle as it heats the ACV, cuts out when reaching setpoint, then only comes in when the ACV has cooled enough. If you need a large volume of hot water on tap at all times, an ACV cylinder/thermal store is great way to go. Simple, giving boiler longevity and TRVs in all rooms. In the situation in this plant room, it appears the ACVs would be just highly efficient rapid recovery hot water cylinders with the thermal store aspect ignored. I would be interesting to know why they were replaced.

@valkoua 4 года назад

Super, could you please do more videos on commercial plant rooms.. Thanks

@nicpye248 4 года назад

I know he’s had to retro-fit those boilers, but he’s going to need a set of steps to service them 😂

@johnburns4017 4 года назад

The boiler modules were a great idea. In some a frame is set up, with additional modules added as needed. Great in a large site which will be extended. The modules are small boilers in their own right. The modules are sequence controlled, switching in each module as needed dictated by the heating demand. In big domestic installation I always tried to get in two small domestic boilers, fitting a sequence controller. Two boilers gives redundancy, and in most cases was cheaper than one large boiler. Popular boilers were cheap. With modulating boilers it is more complex these days. In ye olden dayes just a pipe stat could control the sequencing, by opening a zone valve to the lag boiler, which switched in it.

@moxiemulgrew 4 года назад

Alan Keep the Big Stuff coming..

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@andy90aok 4 года назад

What a brilliant detailed video, doing my commercial gas certs in the next few months and looking forward to it. Do you have any videos on LPG installs or similar?

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@craighooper3619 4 года назад

More commercial mate 👍🏼

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@warrenliversage2888 4 года назад

Previous concord super estimate 200 kw With 2 inch steel gas supply. New installation gas pipe work size possible 28mm copper ?

@AllenHart999 4 года назад

It’s not finished or tested yet. The old boilers are still working. When they change over the gas will be re run from other boilers. Thanks

@warrenliversage2888 4 года назад

28 mm ?

@andygoddam3441 4 года назад

Why run 28 mm if you gotta rip it out , run 54mm gas to the new boilers then do the swap over . No purge point , no Id tape , flues look close to doors

@paulf2529 4 года назад

The boilers themselves look like they would be easy to service and work on. I'd love to see the old control board setup in more detail.

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@paulf2529 4 года назад

@@AllenHart999 brilliant thanks.

@megaman1806 4 года назад

Allen thank you so much for your videos on commercial heating. You have 2 hot water cylinders near the end of this video, the problem I'm struggling with is that the smaller cylinder (which looks like a direct cylinder) only has hot water in it as longs as it is being drawn off. So in other words after a long period of time let's say you choose to boost the hot water, which is now cooled in both cylinders, you will have to draw off that whole smaller cylinder's worth of water before you can get the hot-water that's being heated in the big 500L indirect cylinder. Am I seeing this correctly? Or is this being combatted by the secondary return returning back to the larger 500L cylinder so eventually, the smaller one would also heat up in which case the constant circulating of such a large volume of cooled water from the smaller cylinder may greatly lower the temperatures of the hot water and the boiler will have to compensate by being on longer to bring the domestic hot water to its target temperature? What are the advantages of this set up over a more traditional method of coupling two 300L cylinders for example?

@johnburns4017 4 года назад

Why the two 45 degree elbows on the gas supply? They appear to be not needed.

@felenov 4 года назад

I have a viessmann commercial gas furnace for my house. It runs the heating and hot water (paired with a hybrid ACV boiler) The reason for having such a beast is my house is huge and heat isolation is not the best.

@AllenHart999 4 года назад

Thank you for taking the time to watch my video.

@yaqoobkhan6217 2 года назад

I think there should be non return on the returns if u link to boilers together

@leaturk11 4 года назад

More commercial plz Allen.

@AllenHart999 4 года назад

I have a few more coming soon.

@mrbaza8793 4 года назад

Allen once that return pump has failed I’ll get ridiculous low pressure on hot water right? At work I’m trying to trace the hot water pipes they have a return by the way in a massive plant room and I’m trying to figure out what’s happened to the hot water mate it’s cold and the pressure is poor... 🤷🏾‍♂️

@AllenHart999 3 года назад

The pump doesn’t effect the pressure, It just moves the heat around. Thanks.

@dangas6422 4 года назад

Why all valve is yellow??

@AllenHart999 4 года назад

it's not finished yet. Thanks.

@dangas6422 4 года назад

@@AllenHart999 ok

@baggyrock 4 года назад

Not related to this video Allen but I have an older property and need to trace the radiator plumbing. Is the iPhone Flir One any good for this? I saw you used one in one of your older videos. Thanks

@AllenHart999 4 года назад

baggyrock I will hopefully have a video coming next week with some answers 👍

@chriscars3578 4 года назад

If they r anything like Riello oil burners they should be fairly good

@AllenHart999 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SyuCawNjDR4.html

@Caolangurney 4 года назад

That's peter kay

@yaqoobkhan6217 2 года назад

Sry ment non return valves

@sbplumbing3905 4 года назад

Where did the flue terminate?

@AllenHart999 4 года назад

I think it shows the flies in the next video, that will be out next week, they go up through the roof. Thanks

@charliewillis8527 4 года назад

When i did it it was all designed you just followed the drawing not like domestic

@johnburns4017 4 года назад

Yep, engineers design commercial while domestic is rule of thumb.

@charliewillis8527 4 года назад

@@johnburns4017 when my dad was working we did nursing homes and a fair bit of comercial work i loved it found it very interesting that was before the separate gas tickets now dads retired i mainly do domestic its less hassle money wise etc and im not a young man now lol

@charliewillis8527 4 года назад

@@johnburns4017 iit was funny actually as i canremember a few jobs were they were designed and old sid would filll the wall with a rad and one job a pump set was specified and it wasn't available so we fitted a smaller pump we could get off the shelf to get the job going and it worked a treat which brought in to question why we needed such a big pump lol

@johnburns4017 4 года назад

@@charliewillis8527 The fudge factor, 10% over. It _may_ have been oversized as the client may have said the system may expand at some time. Sometimes space is left on walls for extra wall mounted boilers.

@leaturk11 4 года назад

first!