Hi,
I've had an ecoTec plus 637 in for four years now running two zones and unvented cylinder with the VRC470, VR61 and a VR81. Sadly we just converted the basement and added another zone and Vaillant technical said I couldn't expand my install without moving to their new VRC700 range.
I've fancied getting a Nest for a while so I took the black Friday sales as an opportunity and got three to control all the zones.
I've got it all connected up but noticed the pump overrun making some noise when a zone closed. Previously overrun was handled by the Vaillant controls and we have no auto bypass.
I can add an auto bypass for sure, but I wondered if there is a connection to take off the pump back to one of the zone valves e.g. the ground floor zone, where I could let the pump overrun circulate?
Any thoughts would be appreciated!
Cheers,
Andy
I've had an ecoTec plus 637 in for four years now running two zones and unvented cylinder with the VRC470, VR61 and a VR81. Sadly we just converted the basement and added another zone and Vaillant technical said I couldn't expand my install without moving to their new VRC700 range.
I've fancied getting a Nest for a while so I took the black Friday sales as an opportunity and got three to control all the zones.
I've got it all connected up but noticed the pump overrun making some noise when a zone closed. Previously overrun was handled by the Vaillant controls and we have no auto bypass.
I can add an auto bypass for sure, but I wondered if there is a connection to take off the pump back to one of the zone valves e.g. the ground floor zone, where I could let the pump overrun circulate?
Any thoughts would be appreciated!
Cheers,
Andy