VALLOX DIGIT SE/SE VKL
INSTRUCTIONS FOR USE
5
2.4. Ventilation control with carbon dioxide sensor (option)
• In carbon dioxide control, DIGIT SE adjusts fan speed so as to keep the carbon dioxide
content in the ventilation zone below the setpoint. If two or more sensors are used, fan
speed is adjusted in accordance with the highest measuring result.
• 1...5 optional carbon dioxide sensors may be connected to the VALLOX DIGIT SE unit.
• The adjustment is switched on / off and, if needed, the setpoint (500...2000 ppm) is
defined on the control panel. The factory setting is 900 ppm. The maximum carbon dioxide
content of indoor air should be 1000 ppm.
• While control is activated, you can use the control panel to raise fan speed to the maximum
speed and to lower it to the basic fan speed. In carbon dioxide control, maximum fan speed
limitation is enabled.
2.5. Ventilation control with humidity sensor (option)
Fan speed can be controlled in two ways:
1 Automatic humidity setting. This is suitable for controlling the washrooms in residential
buildings, for instance. The program records the current humidity level and defines it as the
setpoint used as the target value for making air dry after a shower, for instance. The setpoint
changes automatically according to season, and is always correct. This is the factory
setting.
2 You can also set a fixed humidity level of 1…99 %RH on the control panel. This setting can
be used in public saunas and public swimming pools. The program aims at maintaining
humidity at the chosen value. The setpoint can be changed as needed.
The mode of regulation is selected on the controller. The relative humidity of indoor air should
preferably be about 45%.
• While control is activated, you can use the control panel to raise fan speed to the maximum
speed and to lower it to the basic fan speed.
• In humidity control, the fan speed varies between the basic and maximum fan speeds set.
• When the unit is taken into use for the first time, with automatic setpoint search selected
(factory setting), it will take the program 3...10 hours to determine the value. During this
time, humidity control is not active (because the first value set at the factory is 100%).
• Automatic search is active, even if humidity control has not been selected.
2.6. Ventilation control with voltage or current signals
• The fan speeds of DIGIT SE can be controlled with voltage or current signals coming from
the remote monitoring system.
• The signal can be used to select speeds 0...8. However, the maximum fan speed may not
be exceeded if carbon dioxide or humidity control is active.
• The signal changes the basic fan speed.
• The signal does not lock the fan speed, i.e. it can be changed on the control panel within
the defined range. Carbon dioxide and humidity controls also operate within the defined
range.
2.7. Ventilation control with remote monitoring system (option)
• With the help of an optional LON converter, DIGIT SE can be connected to a remote
monitoring system.
• Before connecting DIGIT SE to the remote monitoring system, make sure that they are
compatible.
• The remote monitoring system may be used to control the same functions as on the control
panel.
• The remote monitoring system works in parallel with the control panel and the carbon
dioxide and humidity sensors.
2.8. Post-heating
For most of the year, the heat recovered from air to be extracted is enough to heat the cool air
coming from outside to a suitable temperature. If the heat of extract air is not enough, the air
coming from outside can be heated with the radiator included in the unit. The post-heating
radiator may be electric or water circulated. In both cases, heating can be activated on the
control panel (see section 3.1. of the instructions for use). When heating has been activated,
the unit automatically sets the temperature selected.
Carbon dioxide (CO
2
) sensor
Humidity (RH) sensor
2.8.
LON converter
© VALLOX • We reserve the right to make changes without prior notification.
