Bedienungsanleitung Rika Sumo (Seite 11 von 24) (Englisch)

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4. TECHNOLOGY AND SAFETY 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 efficiency - 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

During operation, the ﬂame noise, pellets dropping and actuation of the

electronic components are audible due to the automatic control.

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 habitation together with a kitchen hood or a ventilation

(WC) it might happen that the built-in pressure switch stops the stove. If using

the hood make sure that an adequate supply of air is ensured.

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

CLEAN appears on the display.

Only for stoves with turning grids:

Every 6 hours (interval adjustable) an additionally automatic big cleaning cycle

is performed. The stove stops, the automatic cleaning tilts the grid and then

re-ignites the stove. The status indicator BIG CLEAN appears on the display

continuously. The cleaning procedure with tilting the grid is to convey ash and

clinker from the burn pot into the ash drawer.

Note

This additional function does not replace a manual cleaning as described in

CLEANING and MAINTENANCE, as this is absolutely necessary to do regularly.

Note

Due to the turning grid there is a certain generation of noise during the

automatic cleaning cycle (START or BIG CLEAN).

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 MANUAL

TOUCH DISPLAY).

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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