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Grundfos UPS2 - Proportional Pressure Mode question

J

JohnWB

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29 Jan 2011
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Cleveland
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United Kingdom
I have just had a Worcester 18Ri boiler fitted to replace my old boiler. I also had the pump changed to a Grundfos UPS2.

The system is a Y type with a HIVE controller and has TRV's on all the radiators. It has a manual bypass across one of the radiators upstairs.

Would it be best to set the pump to a fixed speed or to a proportional pressure setting.

It's noisier than the old pump which doesn't seem right to me
 
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