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Discuss BMS Controllable Commercial Boiler with High Modulation Ratio in the Commercial Plumbing Forum area at PlumbersForums.net

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cr0ft

Plumber
Gas Engineer
Hi all, hope everyone is keeping well.

I was wondering if anyone can help me work out the best boiler to cover this: -

1.) Modulation ratio of 9:1 or higher.
2.) BMS controlled modulation via 0-10v signal.
3.) BMS feedback re boiler modulation via 0-10v signal.
4.) A reliable boiler too would be nice!
5.) No internal pump.

I'm looking at the Potterton Sirius 3 WH which appears to have 0-10v control, not sure if this includes feedback from the boiler though or just control of it.

Thanks to all for any help/suggestions!
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Viessmann 200 don’t think they have changed over models to the new ones with the need for add ons

the new Worcester 162 arnt too bad either
 
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cr0ft

cr0ft

Plumber
Gas Engineer
Viessmann 200 don’t think they have changed over models to the new ones with the need for add ons

the new Worcester 162 arnt too bad either
Cheers Shaun. Am I missing something? I took a look and their modulation ratios appear to be 6.5:1 and 5:1 respectively. With 9:1 and above we believe we can save a boiler in our existing 4 boiler buildings when we come to renew.
 

ShaunCorbs

Staff member
S. Mod
Plumber
Gas Engineer
Cheers Shaun. Am I missing something? I took a look and their modulation ratios appear to be 6.5:1 and 5:1 respectively. With 9:1 and above we believe we can save a boiler in our existing 4 boiler buildings when we come to renew.
sorry was thinking of the other 200s they have a 1-17 mod

Pot are ok but need to be installed correctly and water quality good I would ask if that’s a real world output

most of the Germans are 20-100kw so 5-1
 

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