Automatic Operation Via Sensor Module - Zehnder Rittling ComfoSpot 50 Manual

Automatic operation via sensor module

The application of the Automatic function follows the logic of a demand-controlled system for optimizing the indoor air
quality. Consequently, an optimized response is achieved, and mildew formation is prevented, which ultimately also leads
to an increase in energy savings. The ventilation unit of the ComfoSpot 50 series with a sensor module is classified in
energy efficiency class A.
NOTE
The automatic operating mode switches to frost protection operating mode if frost protection criteria are met.
3.2.3.1 Functional principle of HUMIDITY sensor
NOTE
The HUMIDITY sensor module is primarily supposed to be installed in units for the ventilation of rooms with an increased
occurrence of humidity.
The HUMIDITY sensor module is equipped with a combined humidity and temperature sensor and calculates the relative
humidity. In the evaluation of the current sensor signal for the setpoint selection, the fans are regulated in accordance with
the characteristic curve in diagram 1. Since the dehumidification performance decreases the smaller the temperature
difference between indoor and outdoor air, at a difference of T < 5 K the air volume is reduced to 20 m³/h. When the
Bathroom function operating mode is active, the unit will be operated with the highest fan speed if the relative humidity
amounts to 80% or more.
Humidity control
50
40
30
20
10
0
0 10 20 30
Diagram 1: Factory setting characteristic curve for Automatic operating mode with humidity control
3.2.3.2 Functional principle of CO
NOTE
The CO sensor module and the VOC sensor module are each combined with a humidity/temperature sensor.
2
The CO sensor module and the VOC sensor module both offer the option to evaluate relative air humidity as well as the
2
air quality for controlling the ventilation unit. The VOC sensor module detects volatile organic compounds (VOC) and the
CO sensor module, as NDIR sensor (nondispersive infrared sensor), detects carbon dioxide (CO
2
compounds correlate with the CO
setpoint selection, the fans are regulated in accordance with the characteristic curve in diagram 2.
CO2 / VOC control
50
40
30
20
10
0
400 600 800 1000 1200 1400 1600 1800 2000
Concentration CO2 [ppm]
Diagram 2: Factory setting characteristic curve for Automatic operating mode with CO
NOTE
The CO and VOC sensor modules combined with a humidity/temperature sensor can be deactivated separately if
2
needed, in accordance with the humidity or air quality control. The HUMIDITY sensor technology is primarily supposed
to be installed in units for the ventilation of rooms with an increased occurrence of humidity. However, if both sensor
functions are configured as active, the control characteristic of the higher sensor signal becomes effective.
The required hardware settings on the control system are only allowed to be made by qualified personnel.
10
40 50 60 70 80
Rel. humidity [%]
/ VOC sensor
2
concentration in living spaces. In the evaluation of the current sensor signal for the
2
90 100
). Volatile organic
2
/ VOC control
2