Descale 20-Year-Old Boiler with Coil and Heater: Will It Leak Post-Cleaning?

Hello
I have the following problem, I have a boiler with a coil and a heater [horizontal] installed in the central heating installation and I intend to descale it because its nominal capacity is 60 liters and I am not able to even take a shower because there is no hot water very quickly
it is about 20 years old [since the house has been standing] it has not been touched
And therefore, if I clean it of scale, will it leak??
[to be exchanged for a new lack of funds and therefore I want to do something with it]
from the outside it is insulated with glass wool, so I can't say anything more about it

The heating of this boiler effectively reduces the silt that has accumulated there over the years. Your interference in its interior may help, but not necessarily.
But try it, maybe.

bizon_126 wrote:

Hello
I have the following problem, I have a boiler with a coil and a heater [horizontal] installed in the central heating installation and I intend to descale it because its nominal capacity is 60 liters and I am not able to even take a shower because there is no hot water very quickly
it is about 20 years old [since the house has been standing] it has not been touched
And therefore, if I clean it of scale, will it leak??
[to be exchanged for a new lack of funds and therefore I want to do something with it]
from the outside it is insulated with glass wool, so I can't say anything more about it

Time and lack of maintenance has taken its toll...don't want to be a bad prophet, but the stone keeps the form of the boiler. Sometimes Matix needs to spend a penny to enjoy the benefits of civilization

systemgaz wrote:

Sometimes Matix needs to spend a penny to enjoy the benefits of civilization

What do you mean I don't understand??

20 years is too much for a boiler. Tap water is aggressive.
Buy a new one.

The point is probably that descaling agents are chemically aggressive and, apart from the so-called "scale", they will also dissolve rust, which after so many years is now the main component of: coat, coil and boiler heater.

There was an 18-year-old boiler at my father-in-law's, after dismantling (for cleaning) it was not possible to obtain tightness. Everyone like one husband writes about a new one, so before you start disassembling it, prepare yourself logistically for a quick purchase of a new one, because you can stay without hot water for several days.
for PLN 300-400 you can buy something larger with 1 coil.
I recommend two, it heats up much faster (unless you can mount a jacket, note that it works on low pressure of heating water, water pressure in the jacket every 1.5 Bar)

Hello. Yesterday I was cleaning the boiler because earlier there were more important works
after removing it [I strained myself specifically] and unscrewing it, there was about 3 liters of stone inside, after washing it out of the rust deposit, I put it back on, so far it's not leaking
it is a boiler with one coil, its capacity according to the rating plate is 140 liters
when I lit the stove [it burned for about 4 hours] to my surprise on the stove 60 degrees, the return pipe was warm and the water was lukewarm, that's how it's supposed to heat?
I was thinking about installing shut-off valves in the house so that it would only heat the boiler and radiator in the garage, but I don't know if this boiler is suitable for this
in this way I could heat water on autumn afternoons by throwing a few boards into the stove and not winding up the electricity meter
please provide feedback on this

bizon_126 wrote:

... I was thinking about installing shut-off valves in the house so that only the boiler and the radiator were heated ... I am asking for opinions on this subject

You can do this provided that the riser pipe to the overflow vessel is led directly from the boiler (and not from the riser, as most of them do). The point is not to cut off the vessel with shut-off valves.

According to my thoughts, this should not interfere with anything because I have a return pipe connected to the compensating vessel

I don't know what a return pipe is. Simply, the connection with the vessel, despite closing all possible valves in the boiler room or outside it, cannot cut off the open expansion vessel. It would be possible (although contrary to the regulations) to partially block the heating water circulation by closing only the supply or only the return (depending on which pipe the vessel is connected to). Then there is no circulation in the radiators and the boiler and the vessel are still connected. When the water in the boiler boils, the excess pressure will go to the vessel.

I know that I may not have expressed myself clearly - not professionally - I have 2 pipes coming to the collecting vessel
1) the one that goes hot water to the radiator
2) the one where the cold water leaves the radiator
the pipe with hot water falls into the vessel above the water level, so it has circulation for me
the cold water pipe connects to the vessel below the water level
when the server unlocks, I'll post a diagram, it should explain everything

So okay. In any case, it is better (if at all) to cut off the return pipe, not the supply pipe.