====== About the oven ======

===== How to turn the oven on: =====

==== Empty the ash tray ====

  - Push the lever next to the the upper hatch in and open the upper hatch
  - push the most of the ash in the oven from last burning into the middle where it can fall through (Careful: don't move the rod in the hole to much, otherwise you have to put it in the middle again; this rod is for enhancing the burn process)
  - Open the hatch below and pull the ash tray as far out till you can reach the end with the shovel
  - Take the shovel from the bin near the oven and put the ash into the bucket
  - Take the ash tray out and clean the room for the ashtray with a hand broom (the heat will be transported better if there is no ash)
  - if the bucket is full, empty the bucket on the compost also
  - push the ash tray back in again (at the end use your foot to push it in otherwise you can hurt yourself)

==== Start a fire ====

  - get small dry wood (at the moment in the back of the wood depot near the oven room) and one or two pieces of birch (wood with white bark) or similar light wood - but birch is the best to start a fire
  - put one layer of wood under the place you want to start the fire and cover the whole in the middle of the oven with it
  - put the firelighter on top of these
  - light the firelighter and put the the small wood on top of it like a camp fire and on top of it, without killing the fire the one or two birch pieces (interesting: birch burns really easy, even when wet, but also really quickly, heating with birch is not efficient, but starting a fire to reach the heat fast is)
  - now we have to wait till the fire started (close the upper hatch to reduce the smoke in the room but leave the hatch below open for oxygen) - in the meantime you can get more wood, see next steps
  - get wood

=== if the wheelbarrow is empty or almost empty ===
 
  - get more wood from the right stack. the right stack at the moment is in the wood shed next to the oven room. it is the one on the left hand side.
  - for birch go to the wood depot opposite of the oven room, on other side of the yard. take from the stack against the wall at the end of the depot straight across the room looking from the entrance.
  - take a mixture of big and small wood, only take some birch pieces for the next fire to start; especially don't fill the wheelbarrow with birch pieces; there are two kinds of wood length; the shorter one are for all the small ovens, and the long ones are for the big oven you heat at the moment - take the longest ones (interesting: after wood has been cut, it has to lie 3 years dry in this climate to get rid of the moisture in the wood, so it burns efficiently)
  - bring the wheel barrow back near the oven

==== heating up ====

after around 5 to 7 min the fire should be big enough and already catching on to the birch to put more wood on; put now smaller pieces from light wood in the oven - all in the same direction, one end to the back of the oven, the other towards the hatch - to create a small pile of wood around and a layer on top of the fire and wait till the fire catches up the wood - close the upper hatch in between to not fill the room with smoke

**Careful now: When you open the upper hatch and the bottom hatch is not tightly closed, then it can happen that an explosive flame comes out of the oven. Make sure you close the bottom hatch, especially by a stronger flame, and open the upper hatch SLOWLY.**

after a short time you will hear the fire burning pretty loud (the heat is that strong that it sucks the air from below pretty fast)

  - put more wood inside until the stack in the oven reaches a few centimeters above the bottom of the hatch frame - don't fill it to the last bit/ to the top otherwise the smoke can't get out fast enough
  - close the upper hatch
  - when the temperature indicator of the oven is above 62°C, close the hatch below and pull the lever next to the upper hatch. you should hear a fan working now. it provides the fire with air.

==== Put wood in the oven: ====

  * you should check the oven every two/ two and a half hours at least
  * if you enter the room and the fan is off, you probably waited to long or the oven didn't reach the high temperature fast enough (when the oven is below 60°C for longer then 30 min it will switch off the fan)
  * if the oven is off you have to relight it, see above or only open the lower hatch again so the fire gets enough air again
  * if you enter the room and fan is still on, everything should be fine
  * if there is still a big fire and the temperature sensor is over 60°C put heavy wood in it
  * if there are embers and the temperature is almost 60°C but not a big fire anymore put one layer of light wood on it first then put heavy wood on it
  * if the temperature sensor is below 55°C even if there are embers in the oven, it might not be enough to reach the right heat again - you have to start a fire again and follow the procedures above

==== FAQ ====

**The heat is not pumped to the mill building but the oven is on and the temperature indicator is higher than 62°C at the oven for more than 10min**

This is quite simple but it is a bug of the oven/heating system and you have to restart the oven by shutting both switches on the top part of the oven (labeled with 0 and I for on and off) off and on again.

If that is the bug you can see that also by:
Next to the pipe is the lowest green light on but not the second lowest (4 lights: 2 yellow (or off), 2 green(or off)) - it only produces warm water for the mill, but not for the heating.