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Icon
Description
Explanation
LED1 and the
current LS flash
alternately
Indication of filter
inspection
The filters are monitored based on running time. 90 days is the factory preset default.
After the filter runtime has elapsed, a notification of a filter inspection is signaled by
the filter change LED flashing.
Simultaneously touching the (-) and (+) button for 3 seconds allows you to
acknowledge the indication of the filter inspection and to reset the filter runtime.
LED1 and the
current LS flash
alternately
Indication of fault
An occurring fault is signaled by the fault LED.
Faults that can be diagnosed by the unit are symbolized by LED1-4 using a fault
code (see 3.4.1).
Simultaneously touching the (-) and (+) buttons for 3 seconds allows you to reset the
fault notification.
3.3.1
Automatic operating mode
Automatic operating mode requires the internal installation and configuration of a sensor system module! The
sensor system modules inserted in the exhaust air section of the ventilation unit are available as optional
accessories.
The Automatic function changes into the frost protection operating mode in the event of frost protection criteria
being present!
The application of the Automatic function follows the logic of a demand-based control system for optimizing the indoor air climate,
and thus increases comfort and quality of life in the living areas. Consequently, an optimized ventilation response and prevention of
mold formation is achieved, which ultimately also leads to an increase in energy savings. The ComfoAir 70 ventilation unit with an
automatic sensor system module is classified in energy efficiency class A.
3.3.1.1 Functional principle of HUMIDITY sensor system module
The HUMIDITY sensor system module is intended to be installed in units for the aeration and ventilation of rooms
that are more likely to have higher humidity; i.e. kitchen, bathroom.
Only one sensor module may be installed in the unit.
The HUMIDITY sensor system module is equipped
with a humidity and temperature sensor and calculates
the relative humidity. The fan speeds are regulated
based on relative humidity in accordance with the
characteristic curve in diagram 1. Dehumidification
performance is reduced as the temperature difference
between the indoor and outdoor air is decreased.
Therefore, the airflow rate is set to 12 CFM (20m
3
/h)
when the difference between the indoor and outdoor air
temperature is < 9°F (5 K). When the Bathroom function
operating mode is active, the unit will be operated with
the highest fan speed when the relative humidity is ≥
80%.
Diagram 1: Factory setting characteristics curve for Automatic
operating mode with humidity control.
0
5
10
15
20
25
30
0
10
20
30
40
50
60
70
80
90
100
Airflow Rate [cfm]
Rela2ve Humidity [%]
Humidity Control
INSTRUCTIONS FOR USER & SKILLED TECHNICIAN
