48
Hoval STU Wood Pellet Boiler
Appendix - D
Operating, Cleaning and Fault - Finding Procedures
DE-ASHING THE BOILER
Use personal protection equipment (Gloves, Goggles and Dust mask - type 3M3385
or equivalent)
1)
It is necessary to clear the ash from the combustion chamber, with
the Rake provided, on a regular basis. The frequency of this will
depend on site requirements for heat and the outside temperature.
2)
Switch the Wood burner to the
“Off”
position, found on the KINDLE/
OFF/AUTO selector switch mounted on the control panel.
3)
Turn the separate I.D. Fan selector switch to
“I.D. Fan Only”.
4)
Take care when opening the large door.
5)
Only the fine ash should be removed, leaving the semi burnt pellets
around the tuyeres inside the boiler.
6)
Clean the small hole for the combustion chamber pressure switch
sensing point, which is found on the L.H.S. of the combustion
chamber, close to the boiler door.
7)
Close the door and reset both selector switches to the
“Auto”
positions.
CAUTION
ashes may still be hot, dispose of with care
