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4
Functions
Additional functions
Note
Humidification
Humidification
HumDehumMode
Max. shift temperature
setpoint (P461)
P461 > 0 K
62 | 186
Applications with a 3-speed fan:
●
The external dehumidifier is controlled via external DC – On/Off converter
connected to analog output Y50. The output signal is DC 10 V if
dehumidification control is requested.
●
Output Y50 remains On for min. 30 seconds (not selectable).
●
This function is available without specific settings (P400, P401 and P402 are
not displayed).
The current of the external DC – On/Off converter cannot exceed the maximum
output current of Y50 (max. 5 mA). We recommend using the converter from Titan
(single relay control (IO/1RM) at 3 mA input current).
The function controls minimum relative humidity in the room and is available only
for applications with DC 0...10 V fan or no fan.
The external humidifier connected to the relay output is enabled as soon as
humidity drops below setpoint humidity low (P026) at hysteresis is ±5 %.
To enable the relay function, set P400 (output Q1), P401 (output Q2) or P402
(output Q3) to 8. The humidification S-Mode object sends On to the bus as soon as
the output is energized.
When humidity drops below the low setpoint or exceeds the high setpoint, symbol
is displayed and S-Mode object HumDehumMode sends the corresponding
state on the bus.
When humidity reaches setpoint humidity high (Comfort: P024, Economy: P025),
the thermostat shifts the temperature setpoint to reduce relative humidity in the
room.
The maximum shifting temperature setpoint can be set via P461 at Expert level at
a setting range of -3...3 K, depending on the connected equipment. The factory
setting is 3 K.
The maximum shifting temperature setpoint value is reached at setpoint humidity
high (P024, P025) +10%.
The positive values of P461 (0.5...3.0 K) are used for heating and cooling, or
heating in a humid cold environment.
For heating and cooling, both temperature setpoints (heating and cooling) are
shifted in parallel (i.e., dead zone remains unchanged).
A6V11545892_en--_e
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