Underfloor heating controller unit

[lloydy123]

Just wondering if somebody can help me set up my underfloor heating please on a house I have just bought- no manual supplied.

My control unit is "multi-zone control centre PPI-1050" manufactured by "United controls limited" who no longer exist. I cannot find a manual online.

If somebody could correct or confirm my understanding it would be much appreciated.

The above photo is what is displayed after I press "set". I assume that this is the target temperature for water feeding in to the UFH.

The above picture is the from the home screen, "C" is illuminated as it is on the cooling phase as the temperature is higher than the set point.

The above picture is the screen that displays after I press "hys". I understand that this means that the temperature range is 2 degrees from the set temperature i.e. 43-45 degrees.

I cannot figure out how to change these values. Is there a way of doing this??

Thanks

 

[Dan Robinson]

While I have a think...... Can you think "why do I need to change these?"

can you also a picture of the other components?

 

[Dan Robinson]

But yes, I agree with your surmise about their meaning.

 

[Dan Robinson]

At a guess I would say the key is to hold down set for a number of seconds and using u and down buttons accordingly . Then use set again to scroll.


But again, why change these parameters?

 

[lloydy123]

Hi Dan, thanks for your prompt reply. If I hold down the buttons for around 10 seconds I can then alter the settings, I was too impatient! I don't want to change any values at the moment, just getting to grips with the system.

I have underfloor heating downstairs (screed flooring) with radiators upstairs and a hot water tank. This is my manifold layout:

The layout of this would make me think that there is no mixing of the hot water from the boiler with the cool water in the pipes. This gives me very high pipe temperatures initially which then settle down. There is a 3port valve on the system and no mixer. Is this setup used often and safe for screed flooring?!

 

[Dan Robinson]

that valve is possibly a mixer controlled by the panel you have.

Hope safe it is I don't know and wouldn't like to judge without seeing it personally.

 

[Roger928]

That's a Drayton mo/mo valve. Which I'm pretty sure are discontinued now.

 

[lloydy123]

That's a Drayton mo/mo valve. Which I'm pretty sure are discontinued now.

Yes, it is a Drayton. I assume then that it is not a mixer valve?

 

[Dan Robinson]

Not in this case.

Although it is possible the controller uses the stat on the lower rail to control the valve to give a similar effect.

It will be easy enough to rip the lot out (controls wise) and upgrade it if it is not working properly using that pump and manifold.

 

[DP]

That's a Drayton mo/mo valve. Which I'm pretty sure are discontinued now.

You can still get MOMO valve but internal circuitry is different

 

[Roger928]

I suspect its offering no more control ability than a tmv blender.
Some blenders should offer more control with scald safe control built in.

I think they were used because the valve flow coefficient was high enough for the larger floor areas.

The only reference I can get for the valve is here..
http://tiny.cc/cgk7ey

 

[lloydy123]

ok, that clears it up for me, thanks