AIAS RC Techsheet IMO

AIAS Room controller - installation and operation instruction | 15 / 26
OPERATING MODES
Different operating modes
The controllers have the following operating modes:
• 0 = Off
• 1 = Unoccupied
• 2 = Stand-by
• 3 = Occupied (FS)
• 4 = Bypass
Off
Operating mode Off means that the controller is not heating or
cooling, and the fans are stopped. However, the temperature
must not drop below the set minimum temperature (FS=8°C). If it
does, the controller will start heating, and (if a fan is used) start
the fan whether it has been manually stopped or not.
For controllers with display the background lighting is not lit, and
only OFF is shown in the display.
Unoccupied
Operating mode Unoccupied means that the room where the
controller is placed is not used for an extended period of time,
for example during holidays or long weekends. Both heating
and cooling are disconnected and the fans are stopped within a
temperature interval with congurable min/max temperatures
(FS min=15°C, max=30°C).
The background lighting is not lit, but the current room tempera-
ture (or setpoint depending on the conguration) is shown in the
display. OFF is also shown in the display.
Stand-by
Operating mode Stand-by means that the room is in an energy
save mode and is not used at the moment. This can be during
nights, weekends, evenings etc. The controller is prepared to
change operating mode to Occupied (comfort) if someone enters
the room (presence). The room temperature is controlled around
the applicable heating and cooling setpoints, with an extended
temperature interval (FS=+/-3°C). For example, if the heating
setpoint=22°C and the cooling setpoint=24°C, the controller
will allow the temperature in the room to be between 19°C and
27°C. The setpoints can also be adjusted +/- 3°C via the setpoint
buttons.
The background lighting is lit (dimmed). STANDBY and the current
room temperature (or setpoint depending on the conguration)
are shown in the display.
Occupied
Operating mode Occupied means that the room is in use and is
therefore in a comfort mode. The controller regulates the room
temperature around a heating setpoint and a cooling setpoint (FS
heating setpoint=22°C, cooling setpoint=24°C). The setpoints can
also be adjusted +/- 3°C locally via the setpoint buttons or via a
central command.
The background lighting is lit (dimmed), and the occupancy indi-
cation is shown (see the chapter Display handling). The current
room temperature (or setpoint depending on the conguration)
is also shown in the display.
Bypass
Operating mode Bypass means that the controller controls
the room temperature in the same way as in operating mode
Occupied. The output for forced ventilation is also active. After a
congurable time (FS=2 hours) in Bypass, the controller automa-
tically returns to the preset operating mode. Bypass is normally
activated when the Occupancy button is pressed, via an occup-
ancy detector, a central command or the CO2 level. The operating
mode is useful for example in conference rooms, where many
people are present at the same time for a certain period of time.
The background lighting is lit (dimmed). The occupancy indication
and the symbol for forced ventilation are shown (see the chapter
Display handling). The current room temperature (or setpoint
depending on the conguration) is shown in the display.
Depending on the settings and input values, the controller will be
set to different control modes using different setpoint values: