51
Hoval STU Wood Pellet Boiler
Appendix - D
Operating, Cleaning and Fault - Finding Procedures
CLEANING THE BOILER
HEATING SURFACES
Use personal protection (Gloves, Goggles and Mask)
1)
Prior to cleaning, switch the Wood burner to the
“Off”
position via the
ID FAN ONLY/OFF/AUTO selector switch mounted on the control panel
2)
Allow the boiler to cool down (2 hours approx).
3)
Turn the selector switch to the
“I.D. Fan only”
position.
4)
Open the door carefully.
5)
Carefully remove the spiral retarder from each heat exchanger tube.
6)
Clean flues with the brush provided.
7)
Clean the rear smoke box catchment area ensuring catchment doors are
sealed when refitted.
8)
Refit the spiral retarders.
9)
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.
10)
Close the door.
11)
Turn the Wood burner switch selector to
“Auto”
.
Check the condition of the flues weekly. Cleaning these flues on a regular basis will
ensure good combustion efficiency; the frequency of cleaning will depend on site
and weather conditions.
TURNING THE BOILER OFF
1)
With the Wood burner running switch the BURNOUT/NORMAL selector
switch to the
"Burnout"
position This will run the conveyor tube out of
fuel.
2)
After 15-20 minutes, turn the Wood burner I.D. FAN ONLY/OFF/AUTO
selector switch to the
“Off”
position.
3)
The fire can now be allowed to burn itself out.
