Viessmann Haus&Luft HL - OP - 15 User Manual page 18

- only UV lamps are on
- air ionizer and UV lamps are on
- air ionizer and UV lamps are off
LEDs (6i) and (6j) are lit when the UV lamps and air ionizer are on.
REMEMBER! The photocatalytic filter can achieve full capacity only when the UV lamps are on.
7. The "Mode" button (6b) activates one of the two operation modes:
- "Auto" - the air purifier will automatically pick the filtering speed basing on the filtered air
quality.
- "Silent" – the air purifier will provide the most discrete fan operation
When the appropriate operation mode is selected LED (6k) or (6l) is lit.
8. The air purifier monitors the air quality when turned on and indicates it with the air quality
indicator (9). The indicator displays the appropriate colours and digital value for 2.5 microm-
eter or smaller particles of suspended dust (PM2.5 – particulate matter 2.5) expressed in mi-
crograms per cubic meter (μg/m³). The individual colours refer to the following air quality:
- blue - perfect air - PM2.5 from 0 up to 50 μg/m³
- green - good air - PM2.5 from 51 up to 100 μg/m³
- violet - normal air - PM2.5 from 101 up to 150 μg/m³
- red - dirty air - PM2.5 above 150 μg/m³
Proper operation of the air quality sensor requires a time delay therefore the air condition
shown by the indicator may initially slightly deviate from the actual air condition. Moreover,
the sensor is calibrated for certain specified atmospheric conditions (humidity, temperature,
pressure etc.) and their change may slightly affect the air purifier indications.
Use the "Reset" button (6d) to disable the air indicator, when the button is pressed again the
air quality indicator will be re-enabled.
9. The air purifier is equipped with the dark sensor (6n). After dusk this sensor dims the LEDs and
air quality indicator in the room.
10. If you want to turn off the air purifier, press the "Power" button (6f) and unplug the power
cord.
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