Technology And Safet Y Functions; Operating Comfort; Top Efficiency - Lowest Emissions; Pressure Monitoring - RIKA INTERNO Operating Manual

4. TECHNOLOGY AND SAFET Y FUNCTIONS

The technological advances in your new combi stove are the result of years of
testing and practical experience. The practical advantages of your pellet stove
are convincing:

Operating comfort

The microprocessor-controlled combustion regulation optimises the interaction
of flue gas blower and screw using the current combustion chamber
temperature. This guarantees optimum combustion and operating status.
All function can be regulated centrally using the integrated operating unit. The
intuitive graphic interface permits easy operation; all the settings can be made
quickly and simply.
Top eff iciency - lowest emissions
A very great heat exchange surface together with optimum combustion air
control leads to excellent fuel utilisation.
Fine continuous pellet dosing in an optimised burner pot made of high-quality
grey cast iron leads to virtually complete combustion with very good exhaust
gas values - and this is guaranteed in every operating phase.
Note
The automatic control system means that during operation, the flame noise,
pellets dropping and actuation of the electronic components permissible for
living spaces are audible.

Pressure monitoring

The negative pressure in the combustion chamber is continuously monitored
during operation. Below a defined threshold, a correct operation can not be
guaranteed and the unit will switch off with the fault message „NOT ENOUGH
LOW PRESSURE" for safety reason.
Note
After the occurrence of the error message, maintenance or cleaning work
necessarily has to be carried out! If the error occurs again, a safe operation is
no longer guaranteed, the service must be informed immediately.
Note
If the stove is used in a room together with a kitchen hood it might happen that
the built-in pressure switch stops the stove. If using the hood make sure make
sure that an adequate supply of air is ensured.

Overheating

A high temperature limiter (OTB) switches the stove off automatically on
overheating. The message „STOVE OVERHEATED" appears. Please take the
measures in the manner described in „WARNING AND ERROR MESSAGES". The
stove is ready for operation again after acknowledging the error message at
the internal unit.
Note
Maintenance and cleaning work must be performed if overheating occurs! If
this error recurs, operation without danger is no longer guaranteed; notify
customer service immediately.

Low-temperature shutdown

The unit switches off if the stove cools below a minimum temperature. This
switch-off may occur if pellet ignition is delayed.

Electrical excess current protection

The stove has a main fuse (at the rear) to protect against excess current

Automatic cleaning cycle

The speed of the flue gas fan is increased every hour for a short period to blow
ash from the burn pot, increasing the operational safety. The status indicator
CLEANING appears on the display.
This additional function does not replace a manual cleaning as described in
CLEANING and MAINTENANCE, as this is absolutely necessary to do regularly.

Component monitoring

All the electrical components used are continuously monitored during operation.
If a component is defective or can no longer be actuated correctly, then
operation is stopped and a warning or error message is issued (see WARNING
AND ERROR MESSAGES).

Auger motor monitoring

Too long or wet pellets as well as pellets with too high dust content (see BRIEF
INFORMATION ON FUEL PELLETS) can cause so-called "auger jammers" in the
auger channel. This may also happen if the pellets accumulate in the burn pot
and the backlog reaches into the chute. The auger motor reacts in both cases
with an increased current consumption, which causes the error message:
DISCHARGE MOTOR BLOCKED. The stove will be stopped. Please call the
customer service immediately.

Power failure (during heating)

After a brief power failure, the operating functions that were set before the
power failure, continues. If the power failure lasts longer, the stove goes to start
phase if sufficient temperature or embers are present. If the power failure lasts
too long, the stove goes into the stop phase. The flue gas fan continues to burn
any pellet residues (approximately 10 minutes). Then it will restart automatically.

Power failure (during the initial stage)

After a brief power failure the boot process continues. If the power failure lasts
longer, the stove is in the stop phase. The flue gas fan continues to burn any
pellet residues (approximately 10 minutes). Then it will restart automatically.
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