Valliant pure 15kw heat only on a s plan

[king of pipes]

I will start a heating upgrade on Monday removing a old glowworm boiler and upgrading the system from a y plan to a s plan , new pump , twin channel programmer , room stat , auto bypass , new Trv's and lockshields, am I right in thinking I will need a pump overrun facility for this boiler all controls are in the airing cupboard, boiler is wall mounted in the kitchen , may need extra wiring is my thought ? . Regards kop

 

[quality]

dont think the pure needs a pump over run but a permanent supply and switched live is needed

 

[Harvest Fields]

Morning Mate. I believe that they do need a pump overrun. However vaillant have said in the past that it doesn’t (not sure if they have now changed this stance) they also sold an extra capacitor that could be fitted to counter act not having a pump overrun on some boilers.(this may have been for BG only though) personally if the timer isn’t downstairs and the customer doesn’t want to run a new cable to the pump I would fit a MAINS LINK RF. if you google it you will find it.

 

[ShaunCorbs]

Stainless steel hex doesn’t require pump overrun but if you can always nest too

 

[Harvest Fields]

Not stainless on the pure Shaun. It is alloy. Also if you don’t have one on large systems you will end up with the burner cycle cutting in and out as the boiler cannot get rid of the heat quick enough.

 

[ShaunCorbs]

Not stainless on the pure Shaun. It is alloy. Also if you don’t have one on large systems you will end up with the burner cycle cutting in and out as the boiler cannot get rid of the heat quick enough.

So needs a pump overrun to prevent shock on the alum hex

 

[Harvest Fields]

So needs a pump overrun to prevent shock on the alum hex

Yes mate that would be correct

 

[king of pipes]

Cheers gentleman we got there in the end 😜.kop

 

[king of pipes]

Update chaps pump over run was needed luckily there was enough wires there went well and quite a nice boiler to install kop

 

[Scott_D]

Update chaps pump over run was needed luckily there was enough wires there went well and quite a nice boiler to install kop

No pictures this time 🙂

 

[king of pipes]

No pictures this time 🙂

There you go Scott I will fit more if these especially in a kitchen environment nice metal casing and compact design . Kop

 

[Scott_D]

There you go Scott I will fit more if these especially in a kitchen environment nice metal casing and compact design . Kop

Do you know what pump they have inside?
Just putting together a quote for. 625 and want to be sure it’s man enough

 

[EvilDrPorkChop]

From memory it's that new Grunfos one, the UPM3?

I always put the pump in 100% mode though in the settings, D.014 I think. Number 5 is 100%, 0 is Auto. Don't have any issues.

 

[Scott_D]

From memory it's that new Grunfos one, the UPM3?

I always put the pump in 100% mode though in the settings, D.014 I think. Number 5 is 100%, 0 is Auto. Don't have any issues.

Thanks for the info.

 

[EvilDrPorkChop]

Thanks for the info.

Just done a Pure combi today, and it is a UPM3 that'll do 15-70, so 7m head. I assume the system version gets the same pump. Hope that helps.