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3.7 Support control
Support control is normally used when room temperature control or extract air control has been configured.
When extract air control is configured a room sensor must be installed.
Support control can also be configured to start only with the supply air fan. In this mode, the extract air fan
is not active. This requires a digital output to be configured, which controls the recirculation damper to open
completely so the supply air fan can circulate the air to and from the room.
3.8 Fire
It is possible to configure the controller operating mode when there is a fire alarm. The following options are
available: Stopped, Continuous run, Run via normal start/stop conditions, Only extract air fan, Only supply air
fan.
It is possible to configure which speed the fan should have when in fire mode.
It's also possible to configure if outdoor air damper and exhaust air damper should have Normal function or
be Always open or Always closed. Normal function means that the damper open and close depending on if the
corresponding fan is running or not.
3.9 Filter monitoring
Turn on filter monitoring to monitor the flow through the filter. Digital inputs can be used to connect a
pressure switch to monitor the status of the filter and create an alarm if the signal of the pressure switch
turns on.
3.10 Dampers
The outdoor air and exhaust air ducts close-off dampers can be controlled by a digital output or be hard-
wired to the supply air fan relays for normal, reduced and high speed in such a fashion that the damper is
open when the supply air fan is running.
3.11 Changing the battery
The controller has an internal battery to ensure the operation of the memory and real-time clock in the event
of a power failure. When the alarm Internal Battery is activated and the battery LED lights up red, the
battery has become too weak and needs to be changed. Nonetheless, due to a backup capacitor, the
controller will function at least 10 minutes without power supply.
C C a a u u t t i i o o n n ! ! Changing the battery, as well as dismantling and opening the unit requires knowledge of
proper ESD protection. Therefore, this should be handled by skilled service personnel.
An earthed wristband must be used during this procedure.
Optigo
Ardo
manual, Rev. A
Information for the specialist
29 (76)
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