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4.5 Humidity detection input
The product has a humidity detection input.
2 possible types of signal according to DIP8 (See 3.3)
• A humidity contact sensor.
• Water temperature sensor (CTN 10kΩ): Require BT-D03 RF RH thermostat.
1. Humidity contact sensor.
DIP8 = OFF.
Format of the signal.
The input is a free contact.
In cooling mode, when humidity is detected, the controller:
• Stops the pump signal.
• Closes all actuators.
• Sends the humidity alarms to all other WFC-03 HC RF in the system.
• Requests the WFC-03 HCM RF to enable the dehumidifier.
If the controller is a sub controller, the cooling demand is not sent to the main controller.
2. Water temperature sensor.
DIP8 = ON.
There are 2 usages of the water temperature measurement.
2.1 Humidity detection.
In cooling mode, for each zone, the controller computes the dew point based on the ambient temperature and
relative humidity sent by each thermostat (Thermostat with relative humidity sensor is required).
When the water temperature reaches the dew point in one zone, the controller:
• Enable remote dehumidifier of the zone.
Requests the heat&cool module WFC-03 HCM RF to enable the global dehumidifier for at least 15min and
up the disappearance of the alarm if no remote dehumidifier is available in the zone.
If the controller is a sub controller, the cooling demand of the zone is not sent to the main controller.
2.2 Heating&Cooling mode detection.
When DIP4 = ON and DIP5 = OFF (H&C switch control = WHC-03 HC RF) and DIP8 = ON:
. The water temperature is used to detect automatically the H&C mode.
• If water temperature > 24°C, the system is in heating mode.
• If water temperature < 20°C, the system is in cooling mode.
This feature is useful when the Heat Pump switches automatically in heating or cooling mode and has no output
to inform the system.
• If the WFC-03 HCM RF measures a water temperature:
. The temperature is sent to the WHC-03 HC RF which can be used if there is no water temperature sensor.
• If H&C input= cool mode:
. The system switches in cooling mode regardless the water temperature.
No Humidity Opened contact
Humidity detected Closed contact
Comfort approach: DIP7 = ON Keep the actuator of the zone opened during one hour then close the actuator
and stop the cooling demand in the zone if the humidity alarm is still triggered.
Safety approach: DIP7 = OFF Close the actuator of the zone and stop the cooling demand of the zone.
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