Installation And Commissioning - S+S REGELTECHNIK THERMASGARD FSTM Bedienungsanleitung

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Installation and Commissioning

ATTENTION !
The minimum CO2 concentration of outside air in leafy, hardly industrialised areas is approx. 350 ppm (output voltage = 1.75 V with MR =
0...2000 ppm). The gas inter- exchange in the sensor element happens by diffusion. Depending on the changes to the concentration and the flow velocity
of the air surrounding the sensor, the reaction of the device to the change of concentration may take place with a delay. It is essential to choose an instal-
lation location for the device in which the air stream flows around the sensor. Otherwise the gas exchange may be considerably delayed or prevented.
Commissioning
After the device is switched on, a self-test and temperature equalisation are performed. Depending on the ambient conditions, this process takes
30-50 minutes (as an option, manual calibration can now be performed). If commissioning with automatic calibration, proceed as follows:
1. Open all windows or set the air conditioning system to use outdoor air
2. Switch on the device and move away from the device. If possible, all persons should leave the room.
3. The device is ready to use after 50 minutes.
Automatic calibration of the CO2 measurement – ABC logic
The regular exchange of fresh air is all that is required for the self-calibration technology in the sensor (CO2 concentrations: 350-500 ppm). The
device detects this condition and performs the calibration automatically. It is sufficient to open the windows or set the air conditioning system to use
outdoor air at regular intervals and to stop all CO2-producing processes that influence the ambient air. Proceed as follows:
Open all windows fully or set the air conditioning system to use outdoor air 1x weekly for 15-20 minutes.
If possible, all persons should leave the room during this time.
Regular ventilation of the rooms and flushing of the duct with fresh air will increase the measuring accuracy of the sensor.
Manual calibration of CO2 measurement
Manual calibration can be carried out irrespective of the ABC logic. Sufficient fresh air must be provided before and during the calibration procedure
(CO2 concentration: 350-500 ppm). Also make sure that no CO2-producing processes influence the ambient air. Proceed as follows to perform
manual calibration:
1. Preparation: Remove the housing cover and open all windows or set the air conditioning system to use outdoor air.
2. Press and hold the "ZERO CO2" button until the flashing LED row changes to a steady light after 5 seconds.
Devices with a display indicate "AUTO 0" and change the countdown from 5 to 600.
The calibration process has started. Keep the windows open or the air conditioning system set to use outdoor air.
3. If possible, all persons should now leave the room.
4. After 10 minutes, the calibration is complete (status LED has gone out, the countdown is complete) and the device should indicate or transmit
a CO2 concentration of between 350-500 ppm.
CONNECTING CONDITIONS
The output voltage follows the measured value at the input in a linear fashion and delivers a proportional output signal of 0 -10 V. The voltage outputs
are short-circuit proof against earth. The device is destroyed if voltage supply is applied to the voltage output.
SAFETY REGULATIONS
These devices shall only be used for their intended purpose. Respective safety regulations issued by the VDE, the states, their control authorities, the
TÜV and the local energy supply company must be observed. The buyer has to ensure adherence to the building and safety regulations and has
to avoid all dangers of any kind. We do not assume any warranty for faults or damages arising or resulting from improper use of our equipment or
from non-observance of operating instructions. These instruments must be installed by authorised specialists only!
Preferably shielded cables should be used in order to prevent damages ⁄ errors. It is imperative to avoid laying parallel with current-carrying lines. EMC
directives must be adhered to.
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