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technical/heating.md
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@ -11,7 +11,7 @@ The heat pump control panel is installed on the wall next to the Main Kitchen do
Heat pumps work fundamentally different from gas heaters. (Here's an [article about how they work in general](https://home.howstuffworks.com/home-improvement/heating-and-cooling/heat-pump.htm).) While gas heaters usually send really hot water through the radiators, the heat pump heating system's water temperature needs to be as low as possible. That means:
* <span style="color:red;">You can not heat up a room quickly</span> - expect a room to become really warm only 1-2 days after turning on the radiator
* <span style="color:red;">You can not heat up a room quickly</span> - expect a room to become pleasantly warm only 1-2 days after turning on the radiator
* Much of the temperature control is set centrally. Thus, turning the knobs on the radiators doesn't do much more than switching on or off.
* <span style="color:red;">The maximum reachable temperature is usually around 19.5 °C in Kanthaus.</span> It slightly changes depending on the outdoor temperature though.
* It's good for the system to run continuously rather than to be frequently switched on and off. Hence it is normal and wanted that the heatpump outside is working all the time.
@ -141,11 +141,21 @@ In K20-B water room, there are two filters that should be cleaned regularly (e.g
* Spirotap MB3 (The "big" thing in the return line on the bottom)
* Turn off the heat pump, so the pump is not running
* Take off black magnetic cap to the bottom
* Get a bucket, put it underneath the exhaust in the bottom and turn the knob using the cap fully on for a second
* **Careful:** water comes out with high pressure!
* Pull down black magnetic cap
* Get a bucket, put it underneath the exhaust in the bottom
* Use the cap to turn the knob
* Leave it open for a second, it will immediately get rinsed
* **Careful:** water comes out with high pressure! Don't let the cap slide off the knob!
* Put black magnetic cap back on, turn heat pump back on
* Superfilter (The ball valve with the black handle on the bottem)
* Turn black handle until it reaches closing position
* Unscrew cap and get the filter out
* It's quite hidden inside, find it by feeling with your finger
* Take it out and rinse it, use a (tooth)brush to get it really clean
* Put it back in - no need to let it dry
* Close cap again and open black handle
The outside unit in the garden also has a filter, but it seems to be fine without maintenance after 2 winters.
### :eyes: Additional layers of control
Because of some shortcomings in the controller of the heat pump itself, it is additionally monitored and controlled by a [House Bus node](https://github.com/NerdyProjects/HousebusNode_Heatpump), a [Heishamon](https://github.com/Egyras/HeishaMon) and a selfmade [heating controller script](https://git.kanthaus.online/kanthaus/heating_control).