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S21
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Temperature
Go to Menu ( ) - Engineering menu - Temperature
Current temperature
Intake air temperature.
Supply air temperature.
Extract air temperature upstream of the heat exchanger.
Exhaust air temperature downstream of the heat exchanger.
Room temperature (in the controller).
Return heat medium temperature.
Selecting the master sensor for temperature control to be displayed on the home page.
You can select one of the three temperature sensors:
in the supply air duct (default).
in the extract air duct.
in the room (in the control panel).
Note: if the selected indoor sensor is absent, the system will control the temperature using the
sensor in the supply air duct as confirmed by a corresponding message.
Minimum supply air temperature. The minimum temperature of the supply air to prevent
cold outdoor air from entering the serviced space. If the temperature drops below the pre-set
minimum level and does not return to normal within 10 minutes, an alarm is triggered causing the
unit to shut down.
Changeover winter/summer. The setpoint for the winter/summer changeover selectable in the
+5 °C to +15 °C range (+7 °C by default). Uses the feedback from the outdoor temperature sensor.
Affects the water heater and cooler operation. In the winter season the cooler is disabled while the
water heater provides preheating of the circuit before the unit start.
Main heater type. The main heater control mode option becomes available while selecting the
electric heater or the water heater.
Note: if the water heater is active, prior to disabling it make sure that the heat-transfer medium
supply has been disconnected and that the circuit has been drained to avoid damaging the water
heater by disabling it during the winter season. Also prior to enabling either heater make sure that
all the necessary sensors are present to avoid triggering an alarm condition and causing the unit
to shut down.
Main heater control mode. Two options are available: manual control and automatic control. If
manual control is selected, the 0...100 % heater control slider appears. While in the manual mode
the heater is enabled only if the supply fan is active and the supply air duct temperature is below
+45 °С.
Cooler type. Cooler control logic selection. If discrete is selected, the cooler is controlled by means
of a relay. If analogue is selected, the cooler is controlled by means of a 0-10 V signal and a release
relay. Both the discrete and analogue options enable the cooler control mode selection and
setting minimum cooler on/o time.
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