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What the units include can vary depending on the sales area.
OPERATING INSTRUCTIONS
Operating instructions DUPLEXVENT DV145SE
For indoor air to stay healthy and benefi cial also for the structures
of the dwelling, ventilation has to be in operation continuously. It is
not advisable to stop ventilation even for longer holidays because
it makes indoor air stuffy. Also, during the heating season indoor
air humidity may condense in the ducts and structures and therefore
cause humidity damage. The sensors automatically adjust ventilation
to an optimal level even if the dwelling is empty.
Making the unit ready for operation
1. Connect the plug to the mains supply. DUPLEXVENT DV145SE
is now ready for operation.
2. Start the unit and choose a suitable ventilation power at the
control panel. There is either one or more control panels. See
the operating instructions for control panel.
In normal conditions basic ventilation, with a change of air every
two hours, is suffi cient in living areas. Boosting is needed during for
example sauna baths, cooking, clothes washing or family parties.
If carbon dioxide and/or humidity sensors have been installed in
the system, DUPLEXVENT DV145SE automatically takes care of
demand-controlled ventilation.
Ventilation control
The unit can be controlled with a control panel. The standard week-
clock control can be used to control the fan power of the unit and
the setpoint for supply air temperature.
Furthermore, demand-controlled ventilation can be adjusted with
optional carbon dioxide and humidity sensors.
The fan power of the unit can also be controlled with a voltage
signal.
Controlling ventilation with Airflow Digit SED
control panel
The control panel can be used for the following
ventilation control functions:
Functions for adjusting ventilation
power
• Starting and stopping.
• Power adjustment (8 positions).
• Setting the base fan speed and the
maximum fan speed.
Ventilation power cannot be set lower than
the base fan speed. When carbon dioxide and/or relative
humidity adjustments are activated, power cannot be adjusted
higher than the maximum fan speed. When humidity and carbon
dioxide adjustments have been switched off, fan speed can be
raised to speed 8. (See the operating instructions for control panel,
Section 3.25.)
Ventilation control with carbon dioxide sensor
(option)
• In carbon dioxide control, DUPLEXVENT DV145SE 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 2 carbon dioxide sensors can be connected as options to
the DUPLEXVENT DV145SE 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 carbon
dioxide content in good indoor air is circa 1,000 ppm.
• During control, the control panel can be used to raise fan
speed to the maximum fan speed and to decrease it to the
base fan speed. In carbon dioxide control, maximum fan
speed limitation is enabled.
Controlling ventilation with humidity sensor (option)
There are two modes of adjusting fan speed:
1 Automatic humidity setting, which is suitable for controlling
humidity in for example washing rooms.
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, for instance after a shower. The setpoint
automatically varies for instance according to season and is
always at the right level. This setting is factory selected.
2 Humidity level can also be set fi xed. The setting can range
between 1...99 %RH and is set at the control panel. This can
be used in for example public saunas and swimming pools. The
program aims at keeping humidity at the setpoint. The setpoint
can be changed if needed. The mode of adjustment is chosen
at the controller. Recommended humidity content of good indoor
air is approximately 45%.
• During this control, the control panel can be used to raise fan
speed to the maximum fan speed and to decrease it to the base
fan speed.
• In humidity control, fan speed varies between the base and
maximum fan speeds selected.
• When the unit is fi rst taken into use with automatic setpoint
search enabled (factory setting), it takes 3 to 10 hours for
the program to defi ne the value. During this time, humidity
adjustment is not enabled (because the fi rst value, selected at
the factory, is 100%).
• Automatic search is enabled even if humidity control is not
selected.
Controlling ventilation with voltage signal
• DUPLEXVENT DV145SE fan power can be controlled with a voltage
signal coming from remote monitoring.
• The signal can be used to select speeds 0 to 8. However, if
carbon dioxide or humidity adjustment is enabled, the maximum
fan speed cannot be exceeded. (See the operating instructions
for control panel, Section 3.25.)
• The signal changes the base 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.
Carbon dioxide and humidity sensors
Voltage signal values
Voltage values for each fan speed:
0
0.20...1.25 VDC
1
1.75...2.25 VDC
2
2.75...3.25 VDC
3
3.75...4.25 VDC
4
4.75...5.25 VDC
5
5.75...6.25 VDC
6
6.75...7.25 VDC
7
7.75...8.25 VDC
8
8.75...10.00 VDC
DV145SE
