Manual LUNA c RE / LUNA b T-CU
5
2009-05-22 www.swegon.com
1.4 Sensor calibration
A default calibration of the built-in sensor in the
controller is already done when delivered.
This calibration was measured 2 cm below the
controller, near the sensor.
If the controller needs to be recalibrated, it’s simply
done by setting the set-point knob at the actual
temperature (measured with a themometer). Then
pressand release thefunction button.The LEDwill
blink to confirm the calibration.
The set-point range is always
16-28°C when you perform a
calibration. Even if other values
areset ( thecontroller calculates
these values when the function
button is pressed and released).
Every line and a dot at the set-
point scale is a increase/decrease
of the set-point temperature with
1°C from the scale centre.
Try to be as exact as possible when
you are performing a calibration.
1.5 Resetting the memory
of the controller
It’spossibleto reset thememory of thecontroller to
itsfactorydefault.Thiscan be usefuliftherewas an
error trying to configure the controller etc.
Performing a memory reset:
1. Switch off the power to the controller.
2. Press and hold down the function button ans
switch on the power. After that, release the
function button
3. The LED of the controller is now purple until
you release the function button. When this is
done, the controller will perform a memory
reset, and go back to its normal operation
mode.
1.6 Inverting the heating outputs
The cooling and heating outputs controls normally
closed actuators by default. If normally open ac-
tuators are required in a system, it’s easy to invert
the heating outputs. This can only be done for the
heating output. To invert the cooling output, a con-
figuration device is required.
Invert the heating outputs:
1. Turn the set-point knob to maximum cooling de
mand.
2. Press and hold the function button down for
approximately 5 seconds, until the LED is
turnedofforlit purple.The LED indicatesif the
inversion function is activated or deactivated.
Purple LED = Inversion activated.
LED turned off = Inversion deactivated.
3. Now release the function button. The controller
will now control the heating outputs according
to the selected function.
