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  1. M

    Vaillant ecoTec plus 637 Nest controls and pump overrun

    Great thanks guys, I'll do that then. Thanks again
  2. M

    Vaillant ecoTec plus 637 Nest controls and pump overrun

    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...
  3. M

    Vaillant VR61, VR81, VRC-470 - Adding a third zone

    Hi, I currently have a 2 zone Vaillant setup, with a VR61 wiring centre and the VRC-470 as the main zone1 control and VR81 as the zone2 control. This was all installed about 2 years ago, however we have just had the basement converted and so now have an additional zone. Don't worry I planned...
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