Basic Documentation

Functions
Additional functions
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4.5.2 Hotel keycard/Presence detector
The operating mode can be changed to Comfort or Economy based on room
occupancy (room occupied or unoccupied, via presence detector or hotel keycard).
The presence detector or hotel keycard input switches the operating mode to
Comfort when the room is occupied and switches back to the previous operating
mode when the room is unoccupied.
The operating mode changes as per time schedule only when presence detector is
active:
Time schedule
Presence detector behavior
Comfort mode
When the presence detector is activated or deactivated, the
operating mode remains in Comfort.
Economy mode
● When the presence detector is activated, the operating
mode changes to Comfort.
● When the presence detector is deactivated, the
operating mode changes to Economy (Auto).
Protection mode
Presence detection has no influence on the operating
mode.
Not available
● When the presence detector is activated, the operating
mode changes to Comfort.
● When the presence detector is deactivated, the
operating mode changes to previous operating mode.
4.5.3 Output functions
The changeover sensor ensures changeover between heating and cooling based
on the acquired water temperature. We recommend activating the Purge function
(P50) with 2-port valves. This function ensures correct acquisition of the medium
temperature even if the 2-port valve is closed for an extended period of time. The
valve is opened for 1 to 5 minutes (adjustable) at 2-hour intervals during off hours.
The function is valid for outputs On/Off and all applications.
CAUTION! The Purge function (P50) must be disabled if the thermostat is
used in compressor-based applications.
Limit the On/Off switching cycle to protect HVAC equipment, e.g., the compressor,
and to reduce wear and tear. The minimum output on time and off time for the 2-
position control output can be adjusted from 1 to 20 minutes via P48 and P49. The
factory setting is 1 minute.
Readjusting the setpoint or heating/cooling mode changeover immediately results
in output state calculation; the outputs may not hold the minimum 1-minute On/Off
time.
If P48 or P49 is set to greater than 1 minute, the minimum On/Off time for the
control output is maintained as set, even if the setpoint or changeover mode is
readjusted.
All heating sequences can also be used for underfloor heating.
You can use fan coil unit heating/cooling sequences for underfloor heating or
cooling by disabling the fan via P52.
Purge function (P50)
Minimum output On/Off
time (P48, P49)
Floor heating/Floor
cooling (P52)