vailant 637

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...

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...

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...