STXC2 User’s guide
Version 2.0
29 of 30
3.6 Displacement of temperature set point.
By providing an input signal (2-10V) to analogue input IN2 on the control circuit board STXC2, the
temperature displacement +/-5°C, related to the setpoint, is enabled.
If the temperature input is left open (no connection) the displacement is disabled.
The temperature displacement is shown on the following graph:
3.7 Extended operation.
By selecting the function switch on the ventilation unit to position AUTO it is possible to override
the ventilation unit so it runs with the manual settings from the MMI STCU.
By adding a short (maximum 3 seconds) voltfree starting signal, the ventilation unit runs in the time
defined in the MMI STCU in the data point Manuel hours (See chapter 2.5 Setting of manual
running mode).
By adding a longer starting signal, the ventilation unit runs as long as the starting signal is present.
2V
10V
Setpoint
neutral
Setpoint+5KSetpoint-5K
6V
Input signal
Temp. setpoint
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