How to Increase Pressure in BOSCH JUNKERS Natural Gas Boiler?

Question

Hello Dear all, I have a natural gas boiler called BOSCH JUNKERS as can be seen in the attached picture. My natural gas boiler is too old. The pressure decreases day by day especially when I activate the heating system. How can I increase the pressure inside the system? Please help me because...

jony202b · Answer

Hello, Let's see if this helps you: Greetings.

hkpconsultation · Answer

>>21227196 Hello Dear Jony, Thank you so much but I saw that it is not the same combi as mine. Unfortunately, I do not have this blue tap.

jony202b · Answer

Yeah. I realized that it is not the same model. I just wanted it to serve as a reference for you to look for something similar. Let's see this other video: Here it is black. It is also possible that the knob has been lost and that is why you do not see it. You will have to try. Or this: Added after 2 [hours] 49 [minutes]: page 4: 1.5 Esquema de construcción mark 38 page 9: fig. 7 Placa de conexión mark 38 However in: page 13: Montage-Anschlußplatte, fertig montiert mark 38 I'm sorry. I can't reach more.

serwisszulborski.pl · Answer

This model of boiler has no internal water supply. You will need to look externally (on the installation) for a valve or two valves which serve to supplement the required pressure of approx. Often installers also use a connecting hose. In Poland, according to building law, this should be a disconnected connection (but no one obeys this these days). Look under the boiler or close to it, the water admittance person should watch the pressure gauge while filling....You can also connect to a drain valve plugged with a nut, but you need a hose to connect to the water.

jony202b · Answer

Good. Now, I understand the diagram on page 13

hkpconsultation · Answer

>>21227758 Hello Dear,
Thank you so much.
I have a hose to supply water to the boiler to increase pressure but I do not understand where I should connect my hose in the natural gas boiler that is why I published these pictures. Look at my picture please and if you see the location where I can connect my hose. Please let me know

serwisszulborski.pl · Answer

Under the boiler, on the right hand side you have a valve closed with a 3/4 chrmo-nickel plug .This is probably used to fill water into the system. After unscrewing the cap, turn it slightly to the left and see if water flows. Of course, it's better to prepare a rectangular bowl and used towels for the laundry early on so as not to flood everything. Of course, switch the Junkers off during the entire operation. Bleed the filling hose and fill the water to 1.5bar on the pressure gauge.

drackos2 · Answer

I have the same Junkers ZSR 18-5 KE model and the same question about how to add water to increase the pressure. However, my setup includes a water reservoir.

serwisszulborski.pl · Answer

In these photos, there is no possibility of a water inlet. The water inlet must be somewhere nearby, e.g. on the floor or in a completely different room, possibly a hose connection.... Generally, this connection is a tragedy, I think that even in Poland it is rare for an installer to make such a flock (loading the tank on 1/2 hoses, no valves, security and order).