I have a sealed CH system with an Grunfos Alpha2L pump. There are TRV's on all radiators but no bypass fitted. I'm wanting to fit a Honeywell Evohome system and am realising that I probably should have had a bypass fitted on my system when I converted to TRV's on all the radiators.
However I'm also reading that the Alpha smart pump either doesn't need a bypass fitting or won't work with an automatic bypass.
My boiler is an elderly (10 - 15 years old) Worcester Danesmoor.
So, three choices seem to be available:
Don't fit a bypass
Fit an auto bypass but run the pump at a fixed output
Fit a fixed bypass.
Any thoughts?
Presumably the bypass is really necessary when using a non smart system when all the TRV's could be shut down but the boiler and pump still on and working although the boiler thermostat would surely shut it down? But as I understand it, the Evohome system would work out that the boiler isn't needed and shut it down?
I'm sure I'm missing something here!
However I'm also reading that the Alpha smart pump either doesn't need a bypass fitting or won't work with an automatic bypass.
My boiler is an elderly (10 - 15 years old) Worcester Danesmoor.
So, three choices seem to be available:
Don't fit a bypass
Fit an auto bypass but run the pump at a fixed output
Fit a fixed bypass.
Any thoughts?
Presumably the bypass is really necessary when using a non smart system when all the TRV's could be shut down but the boiler and pump still on and working although the boiler thermostat would surely shut it down? But as I understand it, the Evohome system would work out that the boiler isn't needed and shut it down?
I'm sure I'm missing something here!
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