EN
EN
Cooling register AIR1-KR DX
Installation and Operating Instructions
17
the siphon.
Ensure condensate outlet is frost-proof if necessary.
10. Connect the cooling register to the flow and return pursuant to local regulations.
2�8 Connection and commissioning
2�8�1 Wiring DX element and AIR1 unit
Open the terminal box cover and check the thickness of the wire used for the signal connection.
– Connect the wire to the terminals and close the terminal box cover. The wire connections can be found in the wiring
diagram.
– Connect the other end of the wire (coming from the cooling module terminal box) to the corresponding terminal in
the AIR1 unit terminal box (see wiring diagram).
The terminal box must be installed in a protected location.
2�8�2 Wiring DX element and AHU kit
Terminal
Name
Signal type
Connection requirement
Function
1-2
Ventilation active
DO
Depends on AHU kit.
24 V always present when
fans in operation.
3-4
Cooling activate /
cooling stage 1
DO
Always required if cooling
is necessary.
24 V present when cooling is
required. Serves as cooling
start signal.
5-6
Cooling stage 2
DO
Required if 2-stage digital
signal processing is ne-
cessary.
24 V present when there is a
higher cooling requirement.
7-8
Heating activate
DO
Always required if heating
is necessary.
24 V present when heating is
required. Serves as heating
start signal.
9-10
0-10 V heating/
cooling
AO
Required if temperature
control via 0-10 V signal is
necessary.
Continuously variable 0-10
V signal present depending
on the cooling or heating
requirement.
11-12
DX alarm
DI
Optional alarm input.
If AKU kit alarm is active, the
AIR1 unit will issue the alarm.
13-14
Defrosting alarm
DI
Always required if heating
is necessary.
The fans are deactivated du-
ring the defrosting process.
2�8�3 Commissioning
Adjust the settings in the commissioning assistant after installing the cooling element. Refer to the corresponding chap-
ter of the installation and operating instructions for the respective AIR1 ventilation unit.
The 1-stage DO or 2-stage DO control mode must be configured in the commissioning assistant. If the proportional
control signal AO (0-10 V) is to be used, the 1-stage digital output DO must be selected in the commissioning assistant.
2�8�4 Minimum limit value reduction and PI settings
There is an option to finely tune the DX cooling element control mode via the AHU kit by reducing the minimum supply
air temperature limit value, provided DX cooling is used in combination with a room temp. cascade or extract air temp.
cascade control mode. This results in the quieter, continuous operation of the cooling systems.
The set reduction of the limit value is only activated when DX cooling is active!
The reduction is not active for cold water cooling, heating or when the cooling requirement is deactivated.
The standard setting for this function is a reduction of 5 °C. This value can be adjusted under Configuration
→
Cooling
→
“Reduction of minimum supply air temp. limit when DX cooling is active”. Login as Administrator required.
The control mode can also be tuned by setting the PI value. The P-band and I-time can be set for this purpose.
P-band control stands for proportional control over a defined range (band). A small P-band results in a rapid response
to a certain change, whereas a larger P-band results in a slower response to the same change.
The I-time is defined as the time required to amplify the output signal by the same value of the P-band.
A small I-time results in a rapid increase in the output signal (depending on P-value), whereas a larger I-time results in
a slower increase in the output signal to the same difference.
If the P-band and I-time presets need to be changed, please contact our customer service team for more information.
The P-band and I-time define the behaviour of the entire temperature controller. This means that the heating, heat
recovery and cooling will be set to the same values. A change in the P-band/I-time not only changes the cooling cont-
rol mode, but also the heating control mode.
ATTENTION
NOTE
