VALLOX 280 SE
4
INSTRUCTIONS FOR USE
1.5. Ventilation control with carbon dioxide sensor (option)
• In carbon dioxide control, VALLOX 280 SE adjusts fan speed so as to keep carbon
dioxide content in the ventilation zone below the setpoint. When two or more sensors
are used, fan speed is adjusted according to the highest measuring result.
• 1 to 5 carbon dioxide sensors can be connected as options to the VALLOX 280 SE unit.
• The adjustment is switched on / off and, if needed, the setpoint (500…2000 ppm) is set
at the control panel. The factory setting is 900 ppm. The recommended maximum car-
bon dioxide content in good indoor air is 1,000 ppm.
• When carbon dioxide control is on, the control panel may be used to raise fan speed to
the maximum fan speed and to decrease it to the basic fan speed. In carbon dioxide
control, maximum fan speed limitation is enabled.
1.6. Ventilation control with humidity sensor (option)
There are two methods for adjusting fan speed.
1.
Automatic humidity setting
, which is suitable for controlling humidity in washing rooms, for
instance. The program records current humidity level and selects it as the setpoint, which
it then uses as the target for drying air in a bathroom after a shower, for example. The
setpoint automatically varies according to season, for instance, and is always at the right
level. This setting is factory selected.
2. Humidity level can also be set
fixed
. The setting can range within the range of
1...99 %RH and is set at the control panel. This can be used in public saunas and
swimming pools, for instance. The program aims at keeping humidity at the setpoint.
The setpoint can be changed if needed.
The mode of adjusting is chosen at the controller. Recommended humidity content of good
indoor air is approximately 45%.
• When this control is on, the control panel may be used to raise fan speed to the set
maximum fan speed and to decrease it to the basic fan speed.
• In humidity control, fan speed varies between the basic and maximum fan speeds se-
lected.
• When the unit is first taken into use with
automatic setpoint search enabled
(factory setting),
it takes 3 to 10 hours for the program to define the value
. During this time, humidity adjustment is
not enabled (because the first value, selected at the factory, is 100%).
• Automatic search is enabled even if humidity control is not selected.
1.7. Ventilation control with voltage or current signal
• VALLOX 280 SE fan power can be controlled with a voltage or current signal coming
from remote monitoring.
• The signal can be used to select speeds 0–8. However, the set maximum fan speed
cannot be exceeded if carbon dioxide or humidity adjustment is active, or if maximum
fan speed limitation has been selected at the settings menu to be in operation all the time
(see the instructions for using the control panel, Section 2.3.6.).
• The signal changes the basic fan speed.
• The signal does not lock fan speed, i.e. fan speed can be changed at the control panel
within the set limits. Carbon dioxide and humidity adjustment also operate within the set
limits.
1.8. Ventilation control with remote monitoring system (option)
• With an optional LON converter, VALLOX 280 SE can be connected to an remote moni-
toring system.
• When VALLOX 280 SE is connected to the remote monitoring system, compatibility bet-
ween the two needs to be ensured.
• The remote monitoring system can control the same functions as the control panel does.
• The remote monitoring system works in parallel with the control panel as well as carbon
dioxide and humidity sensors.
Carbon dioxide sensor (CO
2
)
Humidity sensor (%RH)
1.5.
LON converter
1.6.
© VALLOX • We reserve the right to make changes without prior notification.
