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vailant 637

  1. thebaldfox

    Vaillant VR71, SensoComfort and NetSensor Gateway initial set up

    Just had boiler controller upgraded: Existing Ecotec 637 plus. We installed a VR71 / SensoComfort VRC720f / NetSensor Gateway Everything appears to be working. Tech support recommended system diagram 2 (we have single heating and HW circuits). We also added a second circulation pump. They...
  2. S

    Underfloor heating not working.

    Hello, Any help here would be appreciated, I have a vaillant ecotec plus 637 with a multi zone setup. The kitchen has underfloor heating and the rest of the house is using rads, I also have a megaflo water tank. I don't have a manifold I simply have a number of valves, one for the UHF, one for...
  3. K

    Help Installing Nest Gen 3 with Vailant eco tech plus 637

    Hi Guys, I am a little cheesed off as I have already done in 1 boiler PCB board which I will have to order in. My Set up for the ground floor is: 1x Vailant 637 boiler which does my ground floor heating and hot water 1x Honey well programmer 1x Honey well Room stat. and my system is Zoned...
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