weather compensation

I have have a Vailant EcoTec Plus 937 boiler that is about 10 years old. During it's first few years, I had the VRC700f control with the wireless outdoor temperature sensor, that modulates the flow temperature based on the outside temperature. Unfortunately the outside weather temperature...

Evening all, I'm looking to have my 50 year old conventional boiler replaced with a combi, and may have a HWC added in a new location at a much later date. The current boiler is a Potterton Netaheat Electric 16/22. The teeth on the knob on the front have gone so the actual setting is somewhere...

Hi, we’ve got the vaillant ecoFit Sustain. Flow temp is set at 65. CH is calling for heat as per the NEST thermostat, but boiler gets to 41 and then starts to cycle and temp cools down. Rads only getting lukewarm. We did have the sensocomfort thermostat with the weather compensator probe...

Hi all, this is my first post so I apologise if this has been discussed. I have looked. Also apologise for very long post! I’ll be amazed if anyone actually reads this let alone answers the questions but it’s worth a shot! … We had a Viessmann 222-f fitted to our conversion house. It’s an old...

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...

Just took over a new property that has an EcoTEC pure 637 installed, separate HW cylinder, honeywell Evo home programmer (t6). I'm upgrading and have bought the following items after doing a bit of research and would like to get some confirmation of my assumptions: Purchased: VR71 - I have a...

Hi, I have conflicting information from 2 different plumbers/Viessmann itself and not sure what is correct. My system is a Viessmann vitodens 222-f which powers UFH downstairs and rads upstairs. We have no internal thermostats anywhere in the house and just work off of the weather compensator...

I have an Intergas Eco RF 36 with a T4R and weather compensation. I'm looking for my installer to change the current wiring over to OT. Having read a lot today, I'm confused as there lots of conflicting opinions as to whether WC and OT can work together without problems, but not what the...

Merry xmas all I am replacing my creaking ideal mexico with a viessmann 200w 35kw 4 piped. Converting both CH and HW from vented to unvented. I currently have each room zoned off (radiator actuators) via a central controller (Loxone). 6 bedrooms, 3 bathrooms, kitchen and 3 reception rooms etc...

Hi there. I have recently bought a VSMART control for my Vaillant boiler. I feel the weather compensation too intrusive, so that when the outdoor temperature is not too low, the load is very low and the temperature remains more than 1.5 ºC below the setpoint. So, is there a way to switch off...

Hi Everyone, I've been searching online and came across this website which seemed to have knowledgeable contributors so thought I'd join to ask some questions about a planned new central heating system. Apologies for the long post whilst I set the scene. My house consists of a lounge, a...

Am considering fitting the Vaillant weather compensator, the logic behind it makes sense to me but not sure if we have the right setup for it to work properly. Existing system is: 637 Plus system boiler UniStor cylinder Zone 1 - Radiators (upstairs & downstairs) with Honeywell room stat Zone 2...

Hey all, Apologies if this is a really silly question but I have has the VRC 470 installed with a Vaillant system boiler & Vaillant cylinder. Everything is working fine and I have learnt a lot about using the VRC 470 controller (which you need a master's degree in). However I am missing the...

Hi, I am considering purchasing the 35kw version of above boiler. What have been your experiences with this boiler? I am also considering purchasing the weather compensation sensor. Does anyone else have this on this particular model? I know that the weather compensation on the 200 range is...