49
Hoval STU Wood Pellet Boiler
Appendix - D
Operating, Cleaning and Fault - Finding Procedures
CLEANING THE BOILER
HEATING SURFACES
Use personal protection equipment (Gloves, Goggles and Dust mask - type 3M3385
or equivalent)
1)
Prior to cleaning, switch the Wood burner to the
“Off”
position via the
KINDLE/OFF/AUTO selector switch mounted on the control panel
2)
Allow the boiler to cool down (2 hours approx).
3)
Turn the separate I.D. Fan selector switch on the control panel to
“I.D. Fan
only”.
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
boiler door.
10)
Close the door. Turn the I.D. Fan selector switch to
“Auto”
.
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 turn off the
“Pick-Up”
local isolator. This will
run the conveyor tube out of fuel.
2)
After 15-20 minutes, turn the Wood burner switch to the
“Off”
position via
the KINDLE/OFF/AUTO selector switch mounted on the control panel.
3)
Turn the
“Pick-up”
local isolator back to the on position.
4)
The fire can now be allowed to burn itself out.
