7 (8)
4. BOILER OPERATION
Caution ! While filling and cleaning the furnace, keep in mind that the
background vertical brick (Part number 11) is not shock-resistant.
Use a small amount of firewood for the first burning process to avoid bar splitting
by boiling water that could soak in.
- To get wood suitably sized for the boiler, split it into three 1 m long parts and
then into four 12 cm section parts.
- Prior to operating the boiler, push the firing throat (16) against the back wall of
the furnace until it stops. The secondary air clearance h (Fig. 5) between the
front edge of the adjusting plate (30) of the firing throat and the brick of the fire
bar (14) must be 12 mm.
- Ajust the top air damper (24) to approx. 55 mm clearance.
- While firing, keep the ash port (25) and the lower air supply damper (26) closed
and the filling port (23) slightly open.
- To fire the boiler, put small splinters onto the rear bar (15) and fire them with
e.g. bitch bark. As splinters burn up, add more 8 to 10 wood parts approximately
30 mm thick onto the bar.
- In about 15 minutes, fill in the furnace with suitably sized wood. Put the wood
parts close to the back wall and to each other. Close the filling port and adjust
the clearance for the lower damper air supply (26) to about 40 mm.
Fig. 5 Boiler parts and h size
