kunzel BT 2030, Operating Manual

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(b) The flame is only directed towards the open ash door
•
The flue gas ducts beneath and behind the combustion chamber shell are blocked
•
The flue gas pipe to the chimney is blocked
•
The chimney is blocked
•
As a result of unfavourable weather conditions, the chimney is not developing any stack
effect
(c) Boiler overheats, often reaches 95 o
C
•
The boiler is too large for the system
•
The buffer tank is too small
•
Feed the boiler with less additional wood
•
Use larger logs
•
The performance of the pumps is inadequate
•
The Thermomix valve is not opening
(d) The flame is dark yellow in colour and smokey
•
The boiler is dirty in the vicinity of the burner
•
Check the fan performance, the fan impellors may be dirty
•
Check whether the fan damper are sticking
•
The firewood contains plastic
(e) The boiler circulation pump switches on and off
•
The water flow rate through the boiler is too high, set the boiler circulation pump one
speed lower
•
Check the operation of the return flow increase feature (Thermomix)
•
Heat the boiler thoroughly for an extended period of time
(f) Both fans are not running
•
The furnace chamber door lock is not engaged
•
The boiler temperature is higher than 90 o
C
•
The fan fuse in the control panel is defective (2 Ampere, medium time lag)
(g) The secondary fan is running slowly or not at all
•
The O2 content is greater than 6.0%
(h) The exhaust temperature does not reach the minimum figure (150 ◦ C), the boiler target tem-
perature has been exceeded considerably, the fans are set to minimum speed
•
The chimney is too high, set the flue restrictor to reduce the stack effect, or install another
flue restrictor
(i) The O2 content is constantly above the target value
•
The burner has a leak (turbo-burner 2)
•
The wood is too coarse in structure or too wet
•
Cavity burning is taking place within the boiler
(j) The O2 content is always 0,0%
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