Table 2-16 EC fan control configuration settings.
Configuration setting
Fan mode applicability
Description
Fan control
Auto
Disabled:
Fan control in auto mode is disabled (default
setting).
At cooling demand:
Fan control in auto mode is active at
cooling demand.
At heating demand:
Fan control in auto mode is active at
heating demand.
At heating and cooling demand:
Fan control in auto mode
is active both at heating and cooling demand.
Number of fan speeds
Auto and manual
None:
Fan control in auto and manual mode is disabled.
1 speed:
Only the fan speed 1 signal is used.
In auto mode, this means that the controller outputs the fan
speed 1 signal instead of the fan speed 2 and 3 signals.
2 speeds:
Only the fan speed 1 and 2 signals are used.
In auto mode, this means that the controller outputs the fan
speed 2 signal instead of the fan speed 3 signal.
3 speeds:
All 3 fan speed signals are used (default setting).
EC fan starts when demand exceeds (%) Auto
The fan starts when this heating or cooling demand is
exceeded.
Limit maximum EC fan speed to (%)
Auto and manual
In auto mode, the maximum fan speed is set by this value.
In manual mode, the maximum fan speed is set by this value,
and each fan speed is defined as:
✓
Fan speed 1 = 0.33 * this value
✓
Fan speed 2 = 0 67 * this value
✓
Fan speed 3 = 1 * this value
illustrates the EC fan control behaviour in auto mode when a 90% maximum limit is set for the
fan speed output signal, and a 10% heating and cooling demand threshold value for when the fan should start
is set.
Figure 2-27 EC fan control behaviour in auto mode.
illustrates the EC fan control behaviour in manual mode when a 90% maximum limit is set for
the fan speed output signal.
Heating demand
Cooling demand
100%
0%
Room temperature
80%
60%
40%
20%
Fan output (0-10 V)
Demand
Y1: Fan speed signal
Y1: Fan speed signal
Max speed: 90%
Start speed: 10%
Heating
setpoint
Cooling
setpoint
32
Regio
Ardo
manual, Rev. D