Agree, I was once a fan of Grundfos, wouldn't have anything else, but they've lost their way with the UPS3. A few years back I replaced a UPS 5-50 with a UPS2 which has been fine, but heard bad things about the UPS3, like it frying boiler PCBs. Also higher efficiency at the cost of lower reliability. Who wouldn't pay another £5 per year in electric for better reliability, when the energy ends up in the water or the house anyway?
CH Pump Problem
- Thread starter yartin
- Start date
I wasn't aware of the UPS3 damaging PCBs etc but I remember that the original UPS2? was and Grundfos supplied suppressor leads FOC which presumably cured the problem.
Having said that the UPS3 is a really powerful "6M" (6.4M) pump, it will still circulate 1.3m3/hr, 21.7LPM at 6.0M & 60W, almost the same as a 8M DAB Evosta 2or3, which circulate ~ 1.38m3/hr, 23.0LPM at 6.0M & 55W, unfortunately the UPS3 doesn't display the flow or even the power whereas most other A rated pumps now do display this info which can be very useful for trouble shooting.
Having said that the UPS3 is a really powerful "6M" (6.4M) pump, it will still circulate 1.3m3/hr, 21.7LPM at 6.0M & 60W, almost the same as a 8M DAB Evosta 2or3, which circulate ~ 1.38m3/hr, 23.0LPM at 6.0M & 55W, unfortunately the UPS3 doesn't display the flow or even the power whereas most other A rated pumps now do display this info which can be very useful for trouble shooting.
It wasn't personal experience, I can't remember where I heard the rumour.
Do you mean the original UPS2 did it? I fitted my UPS2 in 2018, no special leads, and it's been OK.
It was years before that maybe around 2014 or something like that so may not have been the "2" but that sticks in my mind.
The pump was set at speed II, noticed the operation is like on the motorway speeding at 100mph, ie: hectic lots happening in the airing cupboard. l lowered to Speed I and now it's like cruising at 70mph and now the airing cupboard is calm.
Is there disadvantages at the lowest speed? Any thing else to consider?
This pump is much quicker warming the house and heating the water, should have changed it long time ago.
Is there disadvantages at the lowest speed? Any thing else to consider?
This pump is much quicker warming the house and heating the water, should have changed it long time ago.
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Thats a giant of a 6M (6.4) pump as "good" as a 8M DAB Evosta2or3, I thought that speed2 would be a bit on the noisy side allright so absolutely no downside of running on speed1 as it probably still circulates more than the selectric on speed3. You're lucky you didn't run it on speed3!!.
Have a read of this sometime.....unbelievable almost.
Have a read of this sometime.....unbelievable almost.
The installer strangely said you can run it at any speed like it's up to me, he is gas safe and did sound knows his staff. But still.
It was on speed III but someone on here; may be it was you suggested speed II
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