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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> How to adjust Boliler temperature r?ange https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1304493088 Message started by qualar on May 4^th, 2011, 8:11am

Title: How to adjust Boliler temperature r?ange
Post by qualar on May 4^th, 2011, 8:11am

I have a large oil boiler in my garage that supplies heating and hot water.

It is a round knob that controls the temp that goes in a range 75 - 110 degrees.

I would like to reduce this range to say something like 60 - 95.

The entire system looks like it would be mechanical (no digital readouts or anything) The name of the Boiler is Viesmmann Rotola

Is this possible and if so how?

Please help it is costing me a fortune to run during the summer.

Title: Re: How to adjust Boliler temperature r?ange
Post by thescruff on May 4^th, 2011, 2:09pm

This why we always installed multiple boilers on large systems.

Kent is a Viessmann guy I think, when he logs on.

You'll need an oil guy to change any settings, assuming you can.

Title: Re: How to adjust Boliler temperature r?ange
Post by greg on May 10^th, 2011, 5:57pm

viessmann oil boiler, whereabouts in the world are you as never seen a viessmann oil boiler in the UK before.

If you want a lower temperature coming from the boiler, then turn the boiler stat down, bear in mind though that the heating may have been designed with a higher flow temp.

If the boiler is oversized in terms of output, then the burner nozzle and pump pressure settings may be able to be changed to downrate the boiler.