Truma Elasi (Frost control valve) wiring instructions

[RogerIvy]

I’m changing my combi boiler from a Truma combi that uses a “Truma Elasi” frost control valve.

Does anyone happen to have a wiring diagram for the valve?
Does it just need a 12v supply or is it more complicated (ie has to plug into a Truma circuit board)?

Below is a pic of the valve taken from another thread.

 

[SteveJ]

I think that if it is the ELASI version it is supposed to be connected to the Truma control panel as it is set to operate at the "Room" temperature as opposed to ambient temperature.

The hot water boiler is equipped with an automatic system that prevents the stove/boiler from being damaged by freezing water. It is called the Frost Control valve (or ELASI) and has two versions:


the first one is electrical and it empties the contents of the boiler when the room temperature drops below 4 degrees or the battery voltage drops too low (and therefore also turns on when you disconnect the battery). It consists of a small black box with a red button at the top: when the button is up the valve is activated (closed), when the button is down the valve opens and drains the water to the ground (outside the campervan)

the second is mechanical and empties the contents of the boiler when the ambient temperature drops below 4 degrees. It consists of a black (sometimes gray) box with a blue switch at the top and a blue button at the bottom. When the button is out, the valve is open and therefore the water is discharged to the ground. To close (reset) the valve, turn the key (it should be perpendicular to the axis of the black box) and press the button.

 

[RogerIvy]

Thanks …. what I really need is the wiring diagram or installation instructions.
i.e. The striped red and blue, are they simply 12v input?
Or do they have to be connected to a Truma board.
The red cable is always connected to the main +12v supply - making we question the purpose of the striped cables. The last cable (brown) is disconnected on mine.