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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Plumbing Questions >> HE30 pump run on time https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1302108616 Message started by Terry on Apr 6^th, 2011, 5:50pm

Title: HE30 pump run on time
Post by Terry on Apr 6^th, 2011, 5:50pm

I have moved into a flat which has an Isar HE30 boiler, it works (most of the time). When shutting down from CH, after extinguishing the burner the pump runs on for 6 minutes. It also takes 3 minutes to switch back to CH after DHW draw off has ceased.

The instructions seem to expect a few seconds for these operations rather than several minutes - does it matter?

Title: Re: HE30 pump run on time
Post by thescruff on Apr 7^th, 2011, 6:06pm

Sounds about right to me, perhaps some tweaking of the parameters to reduce the run-on time to 3-4 minutes.