An independent temperature controller for regulating of additional heater or cooler. The controller has an analog input signal for temperature sensors and an analog output signal 0 to 10 V. There is also a digital output signal which is activated when the analog output signal is above 10% (1 V) and deactivated when the analog signal is below 1% (0.1 V).

The controller is configured to be active all the time, follow operation of the unit, run only during defrosting or follow the scheduler.

An alarm will be triggered if Extra controller is in manual override or if a sensor error occurs. The extra controller can also be enhanced with the frost protection if a water based heater is used.


Overview of the menu choices for configuring and settings of the extra controller


Variable

Available options & Selection


Activate extra controller

Configuration > Functions > Function activation

Extra controller

| Yes | No |


Configuration settings

Configuration > Functions > Extra controller

Start/Stop function

| Always running | Unit running | When defrosting |

| Extra time channel 1 | Extra time channel 2 |

| Extra time channel 3 |

Control mode

| Heating | Cooling |

Type of freeze protection

| Select | Freeze protection temperature 1 |

| Freeze protection temperature 2 |

| Freeze protection temperature 3 |

Pump control

| No | Yes |

Pump running mode

| Always running | Auto |

Type of feedback

| None | Alarm | Run indication |

Digital start output

| None | Yes |

Extra contr. Output when recirculation/support

| 0% | 100% | Auto |

Extra contr. Output min limit

[0] %

Extra contr. Output max limit

[100] %


PID Settings

Configuration > PID controllers > Extra controller

P-band

[33] oC

I-time

[100] s

D-time

[0] s


Hardwired interface to the sensor, heater/cooler

Configuration > I/O allocation settings >

Analog inputs > Extra controller temperature

Any available I/O

Digital inputs > Feedback extra controller

Digital outputs > Extra controller start

Digital outputs > Extra controller pump

Analog outputs > Extra controller


Operational settings

Data & Settings > Temperature control > Extra controller

Setpoint extra controller

[18] oC

Digital start output start point

[10] oC

Digital start output start point

[1] %

Pump stop delay

[5] min

Pump-kick hour

[15] h

Pump running when outdoor temperature <

[10] oC

Hysteresis to allow pump stop

[1] oC

Freeze protection >



Setpoint

Data & Settings > Operation overview > Temperature

Setpoint extra controller

[18] oC

Temperature extra controller

__ oC


Alarm settings

Configuration > Alarms > Extra functions

Extra functions > Malfunction extra controller (181)


Manual operation and warnings > Manual operation extra controller (141)



Related topics:

Freeze protection