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04-03-2019, 12:31 PM #1
R32 condensing units in boiler room
We have a project enquiry and the only accessible place to install the four R32 condensing will be in a ventilated boiler room. Any thoughts as to whether there are any regulations preventing this? We are aware of the flammability risk with R32 in such a location. Just trying to get some information before we quote.
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Bedford. Now retired and trying to relax.
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04-03-2019, 01:26 PM #2
Re: R32 condensing units in boiler room
My prime concern would be the correct ventilation of the boiler room, I'm assuming that the boilers are gas fired.
The heat rejected by the condensing units, CU, needs to be removed from the room so that there is no affect on the high level wiring in the plantroom. There are maximum temperature limits for cabling and electric valve motors etc. Also the boiler burners do not really want to see elevated air inlet temperatures.
Another problem can be during the heating season when to CUs are taking heat out of the plantroom. I have witnessed fully frozen units complete with ice laden drip trays.
If you are considering ducting the CU discharge out of the plantroom then you must ensure that there is compensating, positive, airflow into the plantroom to comply with the gas burner regulations.Brian - Newton Abbot, Devon, UK
Retired March 2015
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04-03-2019, 03:53 PM #3
Re: R32 condensing units in boiler room
Thanks Brian, most helpful.
Mobile A/C at its best, see avatar.
Bedford. Now retired and trying to relax.
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04-03-2019, 06:05 PM #4
Re: R32 condensing units in boiler room
Just been looking for more exact information.
A Refcom document may help, or hinder, ... https://www.google.com/url?sa=t&sour...JS897V-z6S0Mx0
I'd forgotten that R32 is heavier than air so you need to be aware of drainage in the plantroom and is it below ground level. Also you may need to install leak detection equipment along with dedicated ventilation systems.
It just gets worse, sorry.Brian - Newton Abbot, Devon, UK
Retired March 2015
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04-03-2019, 09:24 PM #5
Re: R32 condensing units in boiler room
Thnaks Brian, that is some helpful information that I can pass on.
Mobile A/C at its best, see avatar.
Bedford. Now retired and trying to relax.
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05-03-2019, 08:34 AM #6
Re: R32 condensing units in boiler room
.
There are changes made in the newer EN 378 2016 standards.
See
https://www.agas.com/media/4504/en37...dance-note.pdf
It give a brief breakdown but one of the changes is "special location or Special plant room".
They differentialise the location of the room as "Special". Boiler houses might not conform to
that designation?
Regards
Rob
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05-03-2019, 10:47 AM #7
Re: R32 condensing units in boiler room
Thanks Rob that is most helpful.
Mobile A/C at its best, see avatar.
Bedford. Now retired and trying to relax.
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09-05-2019, 12:00 PM #8
Re: R32 condensing units in boiler room
Can you not look at R410a kit.... Still need to look at safety issues but non-flammable gas rather than slightly.
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10-05-2019, 09:19 AM #9
Re: R32 condensing units in boiler room
We ended up quoting R410A equipment.
Mobile A/C at its best, see avatar.
Bedford. Now retired and trying to relax.