Exchanger - Regin OPTIGO ARDO Manual

Information for the specialist
3.3.2

Exchanger

Control
The airflow through the exchanger is controlled by a shut-off damper and a bypass damper. Both dampers
are controlled by the same analog output.
Defrosting
Defrosting is activated when the value of the analog input Defrosting temperature falls below the de-icing
limit (-3°C).
It is deactivated when the analog signal rises above the limit value plus a settable differential (Ventilation ►
Temperature control ► Exchanger ► Hysteresis).
A PI-controller compares the defrosting setpoint with the signal Defrosting guard exchanger. The lesser of the
output signal from this controller and the output from the ordinary controller is used as output to the bypass
dampers.
Freeze protection
A defrosting sensor can be used as a prevention sensor. It is possible to set a starting temperature in
Ventilation ► Temperature control ► Exchanger ► Defrosting setpoint and Min time. This represents both the
minimum time that the function should be active, the supply air fan (SAF) and extract air fan (EAF)
compensation, as well as the minimum time before the next prevention cycle should begin. While the cycle
is active, Defrosting mode is shown in the display.
Table 3-7 Configuration and settings for Plate exchanger
Feature
Exchanger control, Analog
Output
Defrosting exchanger
Defrosting temperature
Extract air fan speed when
defrosting
Temperature setpoints
Hysteresis setpoints
Delay setpoints
26 (76)
Menu path in display
Configuration ► Analog output
Configuration ► Function
config.► Temperature control
Configuration ► Analog inputs
► Defrosting temperature
Configuration ► Function
config.► Temperature control
Ventilation ► Temperature
control ► Exchanger
Ventilation ► Temperature
control ► Exchanger
Ventilation ► Temperature
control ► Exchanger
Variable
Range output:
✓ 0...10 V
✓ 2...10 V
✓ 10...2 V
✓ 10...0 V
Defrosting exchanger
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Actual value (°C)
Extract air fan speed when
defrosting with stopped supply
air
✓ Outdoor start / stop
exchanger temperature (°C)
✓ Defrosting setpoint limit (°C)
✓ Stop supply air time if
outdoor temp < (°C)
✓ Hysteresis (°C)
✓ Hysteresis to stop defrosting
(°C)
✓ Start delay exchanger (s)
✓ Start delay with 100 %
exchanger (s)
✓ Start alarm delay (s)
Note
Yes / No
✓ Auto
✓ Low
✓ Normal
✓ High
Optigo Ardo manual, Rev. A