Adding Water to Junkers System: Locating and Using the Valve at Zero Bar

As in the topic, it shows almost zero bar, I need to add water where is the valve?

On the left side, a short stump protrudes from the bottom next to a brass seal. Try to match an allen wrench or screwdriver. It is possible to buy org. a handle that facilitates the admission of water to the boiler.

Hello,
I would like to know which valve can be used to increase the water pressure in the Junkers oven (as in the picture)

greetings

Hello !
I think blue. In my newer model there is a black dial in the same place.

@ rad500

sp3ots wrote:

I think blue.

Certainly blue.

Thanks!

greetings

Check the diaphragm vessel. I mean the air pressure in his cushion. You must always start filling with this.

rad500 wrote:

I would like to know which valve can be used to increase the water pressure in the Junkers oven (as in the picture)

In the picture you have pressure on the red scale, so it already indicates a significant loss.
In an efficient boiler and installation, the pressure will not change at all, i.e. there are minimal drops in practice, but they are so small that in the period between annual inspections, there is no need to top up water.

Instead of adding water, it would be worth establishing the reason for this drop, because it is certainly not normal.
As Jack63 wrote, it is worth starting by checking the diaphragm, because it is the simplest in my opinion.
Always try to remove the causes of the problem, not the effects.