User Manual

Functions
Additional functions
4
44 | 146 A6V11545892_en--_a
Time schedule via
Bus
Presence detector behavior
Comfort mode
Whenever the hotel guests leave their rooms (room is
unoccupied), the operating mode goes to Economy. The
buttons are locked and icon displays.
Economy mode
● Whenever the hotel guests leave their rooms (room is
unoccupied), the operating mode goes to Economy.
The buttons are locked and icon displays.
● Whenever the room is occupied, the operating mode
goes to previous operating mode from Economy.
Protection mode Presence detector has no influence on the operating mode.
Not available
● Whenever the hotel guests leave their rooms (room is
unoccupied), the operating mode goes to Economy.
The buttons are locked and icon displays.
● Whenever the room is occupied, the operating mode
goes to previous operating mode.
● When the time-switch changes to Economy but the presence detector is still
active, the operating mode remains in Comfort mode until the presence
detector becomes inactive.
● The contact (for example, a card reader) can be connected to multifunctional
input X1, X2 or U1 (set P150, P153 or P155 to 10) or the occupancy is sent via
bus from a KNX presence detector (only one input source must be used, either
local input X1/X2/U1 or KNX bus).
4.6.3 Output functions
The changeover sensor ensures changeover between heating and cooling mode
based on the acquired water temperature. We recommend activating the Purge
function (P251) 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 then opened for 1 to 5 minutes (adjustable) at 2-hour intervals
during off hours.
The function is valid for outputs PWM. On/Off, On/Off 3-wire, DC, 3-position and all
applications.
Limit the On/Off switching cycle to protect the HVAC equipment, for example, the
compressor and reduce wear and tear. The minimum output on time and off time
for the On/Off control output can be adjusted from 1 to 20 minutes via P212 and
P213. The factory setting is 1 minute.
Readjusting the setpoint or heating/cooling mode changeover immediately results
in calculation of the output state; the outputs may not hold the minimum 1-minute
On/Off time.
If P212 or P213 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.
For 2-pipe and 2-stage applications with different equipment, for example, fan coil
units and radiant heating/cooling panels, it is possible to invert the sequence of the
equipment to optimize energy use, when the thermostat changes the sequence
from heating to cooling (P001 = 2 or 3).
Under factory settings, the 1
st
stage in heating (YHC1) is also the 1
st
stage in
cooling.
Notes
Purge function (P251)
Minimum output On/Off
time (P212, P213)
Swap outputs for 2-pipe
and 2-stage applications
(P254)