Herz pelletfire 20/20, Operating Instructions Manual, Page: 79 / 100

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79
9.15 Not indicated faults
Fault Cause of fault Fault correction
Boiler output gradually
decreases
Ash/slag on the grate; fly ash
container is full; heat exchanger
heavily clogged/sooted; inferior
quality fuel
Reduce cleaning intervals or clean
manually; empty the fly ash
container; clean heat exchanger
Desired operating temperature
is not reached
Inferior quality fuel;
previous boiler output higher than
current boiler output;
fuel level too low
Replace fuel if necessary, install
larger boiler; increase fuel level
Ash outlet at the chimney and
connection pipe
Fly ash container full; fuel contains of
excessive finds or super fines; fan
speed too high; chimney draught to
high; Ash outlet at the chimney
connection pipe
Remove fly ash; replace fuel if
necessary or retrofit flue gas
deduster; reduce speeds; retrofit
chimney draught regulator;
Depuffing
Too dry fuel
Too fine fuel
Fuel according specification
Flue gas outlet on the boiler or
exhaust pipe
•
Incorrect layout / double
occupancy of the chimney
•
Leaks (defective seals on doors,
ash box, exhaust pipe ...)
•
Maintenance interval exceeded,
soot build-up, soiling, sooting in
the boiler or exhaust pipe
•
Burning chamber door opened
•
Unfavourable draft conditions, lack
of air, low delivery pressure;
•
Deflagration, unsuitable fuel
•
Design of the chimney according
to the specifications of the
assembly / installation instructions
•
Check seals and have defective /
damaged ones replaced by a
specialist.
•
Perform maintenance, clean boiler
or flue gas line.
•
Only open the combustion
chamber door in the cases
recommended according to the
instructions.
•
Check air regulation
•
Use fuel according to
specifications
Flue gas outlet on the boiler or
exhaust pipe
manually loaded system
•
Spread (difference VL-RL) too
small (buffer already fully charged)
lower amount of energy required,
burn-up time too short;
•
incomplete combustion, reloading
early;
•
too much fuel
•
Before heating up / adding more
fuel, check the buffer temperature,
possibly add less / no fuel. The
difference between flow and return
must be at least 10 ° C
•
Ensure complete burn-off.
•
Add the amount of fuel in
accordance with the operating
instructions
Flue gas outlet on the boiler or
exhaust pipe
automatically loaded system
•
Too much fuel in the combustion
chamber
•
Check and adjust timing of the
slide
VL
RL