Motorized Valves

[BlindChaos]

Hi All
Sorry if this is a silly question
Do all heating systems have a motorized valve? We have just moved into a bungalow and we are having issues with the boiler and I wanted to check the motorised valve but can't find one anywhere. Can find the water pump etc but no valve. The boiler is a Baxi back boiler.

 

[cross thread]

Probably not in your case, you system could be gravity hot water and a pump for heating

 

[BlindChaos]

Ahhhh I may not be blind then lol Thank you for the input it's appreciated

 

[BlindChaos]

I have another question as we had some heatsaver boxes installed but these are now removed but I am currently trying to work out the cabling on the controller unit. Would the live on the water pump go in to position 4 with the thermostat cable?

 

[ianmcd]

turn the HW off and the heating on if the HW automatically comes on you have gravity HW and pumped CH as for terminal 4 you need to tell us what you have pics are best

 

[BlindChaos]

I do not currently have hot water or heating lol we had a electrician come round who removed the heatsaver boxes which were a complete mess. But he was unable to workout the cabling in the back of the controller. When he left he pretty much had it all wired up apart from 2 red and 2 blue. I tracked the cables through the loft and one of the loose cables was to the water pump and the other went to a junction box which in turn was powering a TV box splitter...... (I know that sounds mad but it was) sorry for crappy pic the tablet cam is terrible.

 

[BlindChaos]

Also the controller is a British gas model UP2

 

[MNW67]

I do not currently have hot water or heating lol we had a electrician come round who removed the heatsaver boxes which were a complete mess. But he was unable to workout the cabling in the back of the controller. When he left he pretty much had it all wired up apart from 2 red and 2 blue. I tracked the cables through the loft and one of the loose cables was to the water pump and the other went to a junction box which in turn was powering a TV box splitter...... (I know that sounds mad but it was) sorry for crappy pic the tablet cam is terrible.

What is that photo of? What are HeatSavers and why did you have them removed? Are you saying the electrician couldn't work out the wiring on the back of the UP2?

 

[BlindChaos]

That photo is of the controller back plate. The heatsaver boxes were two boxes that were installed in the 80s as some form of energy saving gizmo that appeared to control of the flow to the rads. There were two boxes one was a modulator and the other was a relay. I had these removed.
Currently wired in to the back plate are both the main supply and neutral in terminal 3 appears to be the hot water and in terminal 4 is the wall thermastate cable. The water pump currently isn't wired in as I don't know which terminal in to. The back of the controller states terminal 1 & 2 are HW off & CH off and terminals 3 & 4 are HW on and CH on

 

[BlindChaos]

The electrian was having trouble distinguishing the cables and tracing them. It's a old bungalow and the loft is full of insulation pipes covered etc it's a mess up there lol

 

[MNW67]

Maybe the answer lies in the wiring of the heatsaver units. Do you still have them? What make are they? How did they work? Were they attached to an external controller or sensor?

 

[BlindChaos]

They were only branded as HeatSaver and they had the address of a local company that no longer exists. From what I could see when they were in place the controller, the wall thermostat and the water pump were all wired via the two boxes. Please see below images of the boxes one of them closed and the other with the fronts off.

 

[BlindChaos]

I had them removed as when the heating was on the relay unit made a continual tapping noise and the rads only ever got luke warm.

 

[ianmcd]

post a pic of your HW CYLINDER

 

[BlindChaos]

Will do I will pop up in to the loft tomorrow