27
Version 1 – GBR (25/10/2022)
D-502-0287
Fig. 32
-
Technical parameters of the AQS sensors for connection to the unit
o
24 VDC sensor power supply
o
0- 10VDC analog output
o
Max. sensor power consumption 5 W
o
Analog sensor input resistance 100kΩ
-
The power supply GND is shared with the GND of the analog input. If the connection is not carried out
correctly, there is a risk of destroying the control board
4.2.2.1.
Connecting multiple AQS sensors
-
Connecting more sensors than 1x CO2 and 1x RH is possible using the “PRO-SUM-08” accessory.
-
With this accessory, you can connect up to 8 sensors of one variable to one input on the control board
(1 pc “PRO-SUM-08” = 8 pcs CO
2
; 1 pc “PRO-SUM-08” = 8 pcs RH)
-
Only sensors from one variable must be connected to one “PRO-SUM-08” accessory.
4.2.2.2.
Unit functionality after connection of the AQS sensors
-
If you wish to control the unit using the AQS sensors, activate the automatic regime function – button 4.
-
The unit responds by continually controlling the need for real-time ventilation triggered by sensors:
o
When the concentration of the monitored substances is reached, ventilation shall be switched
on with the minimum flow rate:
CO
2
– 800 ppm,
RH – 65%.
o
If the reduction of the concentration of the monitored substances in the room is not achieved,
the unit controller increases the flow up to the maximum flow value set by the user.
o
The unit controller will start to decrease the flow rate continuously again while reducing the
concentration.
o
The aim of the regulation – ventilation, is to find the ideal degree of ventilation (flow rate)
depending on the concentration of the monitored substance in the ventilation room. For this
reason, the unit may ventilate for a long time until it reaches safe limits of concentration or
complete ventilation of the substance being monitored.
o
When the concentration is reduced to a specified value, ventilation is switched off and the unit
is switched to the standby mode:
CO2 – 700 ppm,
RH – 60%.
-
If there is a requirement for ventilation from several sensors, the controller gives priority to a sensor
with a higher ventilation requirement.
-
The AQS sensor ventilation switching level settings can be changed in the parent BMS (Modbus RTU).
4.2.3.
External Contact Connection – EXT 1
-
Unit control allows for connection of external contact for remote switching on and off of the unit
(remote control ON/OFF).
-
External contact is designed as potential-free and can be switched on e.g.:
o
Using magnetic door contact (a contact used in security systems). The contact can be installed,
for example, on the window. When the window is opened, the unit stops, and then restarts
when the window is closed.
o
Using a remote switch. In the facility, the electrical appliances are switched off by one button
(the total stop system). The unit may be included in this system via this contact.
o
Using a time relay. The unit may be switched on/off by a time relay located in the switchboard.
