New system design...Help required

[kalas666]

Hi,
A little off topic but could I ask what software you used for that last diagram. 

Micko sry just noticed your post - The diagram is from the now ex DPS website.

I think you can still find it if you look online 

Chris

[andito]

Hi,
A little off topic but could I ask what software you used for that last diagram. 

Micko sry just noticed your post - The diagram is from the now ex DPS website.

I think you can still find it if you look online 

Chris

Link to site:  http://www.heatweb.com/Wood/index.htm

[andrewindevon]

Just noticed this topic, Dave how did you connect the solar thermal to the vanvex in the end?  I ask because we have the same vanvex unit but have never come up with an "approved" way to integrate panels with the heat pump system. 

[David-Robo]

Hi mate,

I think the model has to be the solar model. I think the one I have is the vanvex RS 215L.
We connected the solar pipe work to the flow and return on the solar inputs, then also on the thermal store. We put a motorised valve to split the out put from the panels. The vanvex inbuilt controller runs this and the tdc3 runs the pump that circulates it. This gives priority to the vanvex.

Kind regards, Dave

[andrewindevon]

The model we have has the coil in the bottom for use either to run some underfloor or to put solar thermal in, but getting any info from the makers was impossible. I asked a number of times about the (controller) connections and to confirm the warranty would be ok and just kept telling us it was so efficient in the summer why would we waste time with ST. Gave up in the end.

[David-Robo]

Where did you buy it from? They should have sent you all the manuals with the unit showing where the wire plugs in etc. It is a bit of a simple set up. One connection is provided which powers a pump normally. An there is a sensor input which runs from the panel to the onboard controller. But I simply put the out put to the valve instead of the pump. So when it wants heat it simply diverts the flow instead of starting it via the pump.

All you need is the panel, sensor and circulation pump.

If you'd Like I can get you a copy of the circuitry diagrams and instructions?

[andrewindevon]

Came with the house, I've downloaded the various paperwork I can find but it is a bit vague about things like how it decides whether to run the heat pump, immersion heater or indeed draw from a solar panel.  Our unit seems to use really large quantities of electricity. About 3000 or so kw/hr a year to produce DHW for a family of 5, how's your work out.

[David-Robo]

It's meant to have a sensor connection from the solar panel. So when their is heat in the panel it will draw from this. But if you set it lower than 60 degrees I think it uses. The immersion heaters weekly or something to heat the water to 65 degrees for legionella. And when the solar panel has no heat it uses the heat pump.