Figure 2-25 Flow chart describing controller state changes for when schedules and the occupancy (on/off) button on
the room unit are used.
2.5 Fan control
The fan control function enables the controller to regulate the fan speed for EC fans or 3-speed fans.
A fan is controlled in auto or manual mode. In auto mode, the fan speed is determined by the current
heating or cooling demand. In manual mode, one of the following speeds is used:
✓
Off
✓
Low speed: Fan speed 1
✓
Medium speed: Fan speed 2
✓
High speed: Fan speed 3
The operative fan mode that is currently in use, that is, auto or manual (off, low speed, medium speed, or
high speed), is selected by the end user via the room unit, or set via communication. When the controller is
in the state specified by the
Shutdown controller state
setting, see section
, the operative fan mode is
always auto.
In addition, fan control provides the following optional functions:
✓
Fan boost, see section
.
Bypass
state
Occupied
state
Preset setting
(Default: Occupied state)
Note:
It is recommended
that standby state
is configured.
Occupancy button short press (<5 s)
Bypass timeout (Default: 120 min)
Occupancy button long press (>5 s)
Occupancy
button short
press (<5 s)
Occupancy
button short
press (<5 s)
Occupancy button
long press (>5 s)
Occupied
time schedule
activated
Unoccupied
time schedule
activated
Occupied time schedule deactivated
Unoccupied time schedule deactivated
Occupancy
button long
press (>5 s)
Occupancy button
short press (<5 s)
Shutdown setting
(Default: Unoccupied state)
30
Regio
Ardo
manual, Rev. D