Information for the specialist
Freeze protection sensor
Alarm level
0 %
100 %
Internal signal
Prop. band
Figure 3-1 Freeze protection
Table 3-5 Settings and configuration for freeze protection
Feature
Menu path in display
Variable
Note
Configuration of freeze protec-
tion temperature,
Configuration ►Inputs/Output-
s►Analog inputs ► Freeze
protection temperature
✓
Sensor type
✓
Filter factor
✓
Compensation
✓
Actual value (read only)
Freeze protection setpoints
Ventilation ► Temperature
control ► Freeze protection
✓
Alarm limitation running
mode
✓
P-band running mode
✓
Setpoint standby mode
PID-settings
Ventilation ► Temperature
control ► Freeze protection
Standby mode
If frost protection is activated the controller will go into
Standby mode
when the running mode switches to
Off
. The controller will then control the heating output to maintain a constant temperature at the frost
protection sensor. The setpoint for the standby mode is found in
Ventilation
►
Temperature control
►
Freeze
protection
Electric heating
Electric heating is controlled using the analog output sequence. On activation of the digital input
Overheated
electric heater
the unit will be shut down, either according to the stop sequence or as an emergency
shutdown. The unit will restart after the alarm has been acknowledged and
Overheated electric heater
has
reset. Note that activation of the input signal
Flow guard
will also stop the unit.
24 (76)
Optigo
Ardo
manual, Rev. A