Vaillant VR33 (with Nest) and VR66

[SamThor]

This is really interesting thread, are you able to post any pics of your nest wiring into the vr66 board and explain the process a bit further. Any information appreciated, I have a y plan system and I’m considering installing the vr33 board for better modulation with nest

 

[boxer01]

This is really interesting thread, are you able to post any pics of your nest wiring into the vr66 board and explain the process a bit further. Any information appreciated, I have a y plan system and I’m considering installing the vr33 board for better modulation with nest

I cannot send pics cos I have no vr66 but the vr33 is plug and play plugs into xr31 or xr32 depending on your boiler. The two OT wires from heat link go onto OT connections on vr33 and make sure 24volt connections in boiler have a link in. Also on the nest stat make sure you have enabled OT and not on/off switching.

 

[SamThor]

I cannot send pics cos I have no vr66 but the vr33 is plug and play plugs into xr31 or xr32 depending on your boiler. The two OT wires from heat link go onto OT connections on vr33 and make sure 24volt connections in boiler have a link in. Also on the nest stat make sure you have enabled OT and not on/off switching.

Thanks for confirming I’m going to order the vr33

 

[RGInstaller]

Just doing this today. Just checking nothing connects the boiler to the vr66?

Are the nests connected to it?

 

[RGInstaller]

Connect the bus from boiler to vr66?

 

[Mcalm01]

Thanks for confirming I’m going to order the vr33

I'm interested to find out where to order a VR33 from. I searched around and could not find any supplier here. They mostly come from NL but could only find one who had stock but they stopped shipping to the UK.

 

[RGInstaller]

 I'm interested to find out where to order a VR33 from. I searched around and could not find any supplier here. They mostly come from NL but could only find one who had stock but they stopped shipping to the UK.

Mine was from a Dutch company but they don't have stock.

 

[Mcalm01]

Mine was from a Dutch company but they don't have stock.

Thank you for your reply. I will keep on searching around.

 

[Mcalm01]

Thank you for your reply. I will keep on searching around.

cvonderdelenhartog.nl has received VR33 supplies. I just ordered one unit.

 

[RGInstaller]

cvonderdelenhartog.nl has received VR33 supplies. I just ordered one unit.

That's where I got it from. Works great