13
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www.ventilation-system.com
UNIT CONTROL
MAINTENANCE
DISCONNECT THE UNIT FROM POWER SUPPLY BEFORE ANY
MAINTENANCE OPERATION WITH THE UNIT.
The recommended unit maintenance periodicity is 3-4 times per year.
Maintenance of the unit means regular cleaning of the surfaces of dust and cleaning or replacement of the
fi
lters.
To remove dust use a soft brush, cloth or a vacuum cleaner. Do not use water, abrasive detergents, solvents, sharp objects. The impeller
blades must be cleaned once in year.
Clogged
fi
lters increase air resistance and impair the unit air capacity. Clean the
fi
lters with a vacuum cleaner or
fl
ush under running
water. The
fi
lters must be cleaned at least 3-4 times per year.
Supply
fi
lter
Casing
Heat exchanger
Extract
fi
lter
Front panel
Clean the heat exchanger regularly to maintain its high heat recovery e
ffi
ciency. Remove the heat exchanger of the unit prior to the
cleaning operation. Clean the heat exchanger with a vacuum cleaner or
fl
ush it under running water.
SP3
-
1 SENSOR SPEED SWITCH
• To activate a required unit speed touch a respective speed button on the sensor panel.
— low speed
— middle speed
— high speed
• For speed changeover, touch a respective speed button. The active speed button glows blue.
• To turn the unit off touch a respective current speed button again. The sensor switch panel is not lighted
when the unit is off.
• The speed switch generates a sound signal each time the sensor panel is touched.
P3
-
1
-
300 MECHANICAL SPEED SWITCH
• To activate a required unit speed rotate the speed knob clockwise and select one
of three speed settings:
1 - low speed
2 - middle speed
3 - high speed
• To turn the unit off rotate the speed knob counter clockwise and set it to OFF
position.
3
O
1
2
3
OFF
