Dew point control for dehumidification of cellars with radio sensors

Dew Pont ventilation Control Unit for dehumidification

The dew point ventilation control is used for automatic cellar ventilation to reduce humidity.

Optimal ventilation timing is achieved thanks to the dew point control and two precision sensors measuring both the internal and external air temperature and humidity. The control unit then automatically switches on the SOLO+ fan.

Up to 10 SOLO+ ventilation systems can be connected to the dew point control. Each SOLO+ ventilation system covers a basement area of 30m².

We supply the dew point control unit as standard with APP, and wired sensors (WLAN is needed for the radio sensors), and without a radio receiver (i.e. the power supply of the fans runs directly via the dew point control unit)

If you connect several SOLO+ fans, you can set directly in the dew point control that the fans should generate cross ventilation.

Optionally available:

• Radio sensors (WLAN required)
• Radio receiver (you do not need WLAN for this. With this you can cap the power supply of the fans by radio)

Programmable settings:

• minimum temperature
• maximum temperature
• ventilation time
• ventilation pause
• switching differential
• minimum humidity
• digital lock
• operation time

Optimal settings:

• minimum temperature: 12° C
• maximum temperature: 25° C
• ventilation time: 30 minutes
• ventilation pause: 20 minutes
• switching differential: 1,0
• digital lock: Off
• operation time: 00:00 till 23:59

Functional description of dew point control

The function of the dew point control is explained below. Temperature and humidity sensors measure the internal and external temperatures and humidity. These measured values are recorded and evaluated for control in the control unit. When setting up the control unit, parameters are set:

• minimum and maximum temperature for the interior. 
• minimum humidity (also called target humidity) for the interior
• Difference in absolute humidity between inside and outside
• other settings such as time, working time, ventilation duration, etc. (explanations of these settings are listed in detail in the operating instructions)

The control unit ventilates when it is drier outside than inside to dry the room. Otherwise, the message “It is not dry enough outside” appears. The absolute humidity is used for this, not the relative humidity. You can see the absolute humidity on the last line of the display. In addition, other conditions must be met for the ventilation to be switched on:

The indoor temperature must be within the set limits. The minimum and maximum temperatures you set are crucial for this. Otherwise, the message “Minimum temperature reached” or “maximum temperature reached”. If the indoor temperature is outside these limits, the device can only ventilate if the outside temperature behaves in such a way that ventilation can bring the indoor temperature closer to the set limits (heating or cooling the room). Example 1: Indoor temperature: 18 °C, minimum temperature: 20 °C, maximum temperature: 27 °C. The indoor temperature is outside the limits. Ventilation can only take place when the outdoor temperature is greater than 18 °C so that the room can be heated and thus brought closer to 20 °C.

Example 2: Indoor temperature: 28 °C, minimum temperature: 20 °C, maximum temperature: 27 °C. The indoor temperature is outside the limits. Ventilation can only take place when the outdoor temperature is lower than 28 °C so that the room can be cooled and thus brought closer to 27 °C. The relative humidity inside must be greater than the set target humidity. Otherwise the message “Target humidity reached” appears In addition, the current time must be within the working time limits you have set. Otherwise, the message “Outside working hours” will appear. If the conditions are met, the device switches the ventilation on. This continues as long as the conditions remain met or the set ventilation time has elapsed. Regardless of why the ventilation is switched off again, the message “Fan pause” always appears on the display. Only after the pause are all conditions checked again and ventilation can begin again. Example: absolute humidity inside: 12, absolute humidity outside: 10.8, difference: 1.0, ventilation: off.

Since the absolute humidity inside is greater than the absolute humidity outside plus the difference (12 > 11.8), the ventilation is now switched on (provided the other conditions are also met). It is only switched off after End of the ventilation period or when the absolute humidity outside is at least as high as the absolute humidity inside
(difference for switching off is always 0). After the break, the device is only switched on again when the difference of 1.0
is maintained. So everything from this example is repeated.

Remote receiver

A remote receiver is provided optionally that can be connected to the fan.
It allows you to use near-by sockets with no need to run cables across different rooms.

App

The App allows you to analyze daily and monthly internal and external humidity and temperature values. It also provides real time data on device operation thanks to an operating hours meter and event recorder.

The App is suitable for Android, Windows and iOS devices.

The dew point control communicates possibly also via wireless LAN. It simply connects to your WLAN network like a mobile phone, and it is ready for operation.