I can read Swedish so all comments appreciated!
Executive summary (tl;dr): GT3 (hot water temperature) goes to about 90C... almost boiling tap water. There seems to be no way to set this temperature.
Question: How do I control the varmvattentemperaturen?
{edit: found
this post Problem was a bad triac on a controller board. Sound like my problem?
}
The details: I live in a rented house with an IVT 290, no heat pump. The IVT received no maintenance for many years... seemed to work fine but every now and then I would have to reset the fuse on the bottom of the control panel. A couple weeks ago it started to require a reset every day so I figured something was wrong.
What I've done:
Avluftning. I went around to every radiator in the house and bled the air. A couple of them had quite a lot. I also bled the tank in the heater until water came out. (using the valve next to the pressure relief valve/hose marked 2.5atm pressure. the tank had a lot of air in it.)
Filling. I opened the supply valve on the bottom left while avluftning to add water to the heating system. Once the system was running and warm, I adjusted that valve again until the pressure in the system was around 1.5atm.
The system seemed to operate better now (not blowing the breaker) but the tap water in the house was really warm, close to 80C! This causes the pressure in the heating system to go up also... above the stated max pressure of 2.5atm.
I cannot run the system now without GT3 going to max.
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