PV 20a
If the storage runs empty before new fuel is added, the external auger must be loaded again as
described in chapter Starting. Failing to do so will result ‘No Pellets’ due to fuel loading timeout.
Maintenance
Pellet burner PV 20a requires systematic maintenance. The maintenance period depends on the
quality of the pellets and heating intensity. The average maintenance period is 1 week. The burner
needs cleaning when the ash layer on the grate is thicker than 1.5-2 cm. As even high quality pellets
contain 0.3-0.5% ash, then the burning grate must be cleaned at least once a week. Depending on
the quality of the pellets, it might be necessary to clean the burner more frequently.
To clean the burner:
1. Turn off the burner by turning the thermostat to 0.
2. Let the burner cool down for at least 1 hour.
3. Open the boiler's door to gain access to burning chamber
4. Remove the grate and clean it from any residue. Make sure all holes on the plate are clean.
5. Remove ash from burning chamber.
6. Clean the boiler. The frequency of cleaning the boiler depends on the type of the boiler and
heating intensity. For more information about cleaning the boiler, please see boiler's user
manual.
7. Put back the grate. Make sure the stopper of grate is touching the burning camber from
inside. Misaligned base plate will change the air flow and reduce burning efficiency.
8. Close the boiler's door to finish the maintenance and turn the thermostat to desired
temperature.
NB! The burner grate must be checked and cleaned once a week. This assures trouble-free and
effective operation of the burner.
The connection between the boiler and chimney must be completely tight. All cleaning and
maintenance openings must be closed with covers.
Feed screw motor
The condition of the feeding screw motor is crucial for safety. Therefore the motor must be replaced
after every 2000 working hours or after 40-50 tons of pellets are burned or when the burner gives
warning. Burnered pellets amount (in kg) is accessible from info-menu.
Battery
Battery must be replaced when the burner gives warning message or after 5 years. As the battery is
also safety device, burner monitors the state of battery and blocks next work cycle if battery voltage
is not within limits.
Fan
The air in boiler room contains dust that can deposit on fan bearings. The best cure is to keep boiler
room as clean as possible. Otherwise the fan bearings can get stuck after several years of working
and must be replaced.
19 www.pelltech.eu
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