Hi All,
Just had my new heating system installed comprising of:
Vaillant Ecotec 630 plus system boiler
Vaillant Unistor 210ltr unvented cylinder with 18ltr expansion vessel
Vaillant 360f programmer
VR65 wiring centre
VR10 cylinder probe
Magnaclean fitted on return under the boiler
All up and running, system power flushed and also flushed raditor by radiator (lots of hitting bottom of rads with a mallet), all (18) radiators then balanced. All rads bar two towel rails are fitted with TRV's. The system has also be installed as an 'S' plan with two MV's (one controlling heating side the other the DHW).
All is working, and I must say the DHW is fantastic, plenty on tap, powerful & hot.
The concern I have is related to the heating side of things - basically, most of my 18 rads are being fed from a 22m main heating circuit with long lengths of 15mm copper pipe runs, reducing down to 10mm by the time the connect up to most rads.
My concern with this is that it seems to take a lengthy time to see an increase in heating temps say from 18 degrees to 22 degrees (this 4 degree increase can take several hours to achieve even though the heating is set to full power and no DHW is being called for at the time - so heating is getting the full boiler output whilst trying to increase the temp up).
My heating engineer suggest that this may be due to teh long 15mm & 10mm radiator feeds restricting the heating flow somewhat. He has sugegsted two options these being:
Renew entire house pipework to all rads with wider bore piping (this is really not an option due to costs & mess it will make of the house)
Or fit a secondry heating circulation pump (Grundfos Alpha 2 15/60) on the heating side next to the heating two port MV and wired into the VR65 with the heating MV so they work together?)
My question to all of this is - would the above secondary circulation pump improve the heating-up times ie; due to more pump flow & get the hot water to the rads quicker & with more force - or would it make little/no difference?
Additionally would fitting this extra heating pump cause any conflicts/problems with the boiler pump.
Appreciate your thoughts on the above extra pump questions.
Thanks
Just had my new heating system installed comprising of:
Vaillant Ecotec 630 plus system boiler
Vaillant Unistor 210ltr unvented cylinder with 18ltr expansion vessel
Vaillant 360f programmer
VR65 wiring centre
VR10 cylinder probe
Magnaclean fitted on return under the boiler
All up and running, system power flushed and also flushed raditor by radiator (lots of hitting bottom of rads with a mallet), all (18) radiators then balanced. All rads bar two towel rails are fitted with TRV's. The system has also be installed as an 'S' plan with two MV's (one controlling heating side the other the DHW).
All is working, and I must say the DHW is fantastic, plenty on tap, powerful & hot.
The concern I have is related to the heating side of things - basically, most of my 18 rads are being fed from a 22m main heating circuit with long lengths of 15mm copper pipe runs, reducing down to 10mm by the time the connect up to most rads.
My concern with this is that it seems to take a lengthy time to see an increase in heating temps say from 18 degrees to 22 degrees (this 4 degree increase can take several hours to achieve even though the heating is set to full power and no DHW is being called for at the time - so heating is getting the full boiler output whilst trying to increase the temp up).
My heating engineer suggest that this may be due to teh long 15mm & 10mm radiator feeds restricting the heating flow somewhat. He has sugegsted two options these being:
Renew entire house pipework to all rads with wider bore piping (this is really not an option due to costs & mess it will make of the house)
Or fit a secondry heating circulation pump (Grundfos Alpha 2 15/60) on the heating side next to the heating two port MV and wired into the VR65 with the heating MV so they work together?)
My question to all of this is - would the above secondary circulation pump improve the heating-up times ie; due to more pump flow & get the hot water to the rads quicker & with more force - or would it make little/no difference?
Additionally would fitting this extra heating pump cause any conflicts/problems with the boiler pump.
Appreciate your thoughts on the above extra pump questions.
Thanks