4Information for the specialist - Function descriptions . Regin VCA283DW-4, VCA283W-4, VCV203DWM-2, VCA152DW-4, VCA152W-4
Regin VCV203DWM-2 is a versatile room controller for heating and ventilation applications that enables you to create a comfortable indoor climate. The controller is equipped with two analog inputs for sensors or other signals, two digital inputs for external control and two relay outputs for controlling fans or dampers. The control functions are easily set up via the LCD display and the user-friendly menu structure. With its compact size and DIN rail mounting, the controller is easy to install in electrical cabinets or other confined spaces.
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Information for the specialist - Function descriptions
4 Information for the specialist - Function descriptions
4.1 Function overview
A number of different control functions as well as analogue and digital in- and output functions can be found in this controller. Certain functions are necessary, while others can be considered optional. The choice of which functions are to be used is free. The only restriction is the physical number of inputs and outputs of the different models. Information about configuration for the different functions is found in
5 Information for the specialist - Configuration
.
The program for an air handling unit contains, apart from other things, the following functions:
Different temperature control modes
✓ Supply air temperature control, with or without outdoor temperature compensation
✓ Room temperature control (cascade control)
✓ Extract air control (cascade control)
✓ Seasonal switching between supply air temperature control and room/extract air temperature control
✓ Outdoor compensated room/extract air control
✓ Extract air depending supply air temperature
With control of:
✓ Heat exchangers (liquid connected, plate or rotating)
✓ Mixing dampers
✓ Heating coil (water with or without frost protection, electric with high temperature limit switch, DX or combi coil)
✓ Cooling (water, DX with or without exchanger control)
✓ Circulation pumps
Fan control
✓ 1-, 2- or 3-speed supply air and extract air fans
✓ Frequency controlled supply and extract air fans with pressure or flow control, manual control or external control from a VAV system
✓ Pressure controlled supply air fan with slave connected extract air fan (output dependent or flow dependent) or opposite function (pressure controlled extract air fan with slave connected supply air fan, output dependent or flow dependent)
Humidity control
It is possible to use either humidification or dehumidification, or to use combined humidification and dehumidification.
Timer control
For starting and stopping the unit, annual clock function. Up to 4 timer outputs for control of external functions such as lighting, door locks etc.
Demand controlled ventilation
In buildings with strongly varying occupancy, the fan speeds or mixing dampers can be controlled by the air quality measured by a CO
2 sensor.
Support control
When using the control function room control or extract air temperature control, it is possible to utilise support-heating and/or support-cooling.
Corrigo manual, Rev. D 31 (196)
Information for the specialist - Function descriptions
Free cooling
When this function has been activated, it is used during the summer to cool the building during the night using cool outdoor air, thereby reducing the need to run chillers during the day.
Free heating
If the outdoor temperature is higher than the indoor temperature and there is a heating demand, the recovery damper will not open for recovery but instead open fully for outdoor air. This may occur during low night-time outdoor temperatures, when the room has been cooled considerably and the outside heat is rising faster than indoors. This function is activated at the same time as Free cooling .
Enthalpy control
Measures and compares the energy content (enthalpy) of the outdoor air and the extract air (temperature and air humidity). When this function is active, the mixing damper signal will be overridden to recirculation if the enthalpy is higher outdoors than indoors.
Pretreatment
Damper and pump control for preheating or precooling of the outdoor air via an underground intake channel.
Cooling recovery
If the extract air is colder than the outdoor air and cooling is required, the heat exchanger control is reversed in order to return the cool extract air.
Recirculation control
Recirculation of air using a supply air fan and (optionally) extract air fan and a recirculation damper with or without temperature control. Used as a recovery function or during heating with support control during the night. Recirculation control is available as an analogue or a digital function.
Step controllers heating/cooling
There are 2 equal step controllers. Both controllers will have 4 steps and can be configured as sequential control or binary control.
Change-over
In 2-pipe systems where a combination heater/cooler is operating together with a heat pump, change-over is a function that enables using the same pipe for both heating and cooling, depending on which is currently required.
32 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
4.2 Temperature control
4.2.1
General
Corrigo has a choice of the following control modes:
1. Supply air
2. Supply air outdoor compensated
3. Room cascade
4. Extract air cascade
5. Room (summer) else outdoor compensated supply air
6. Extract air (summer) else outdoor compensated supply air
7. Room outdoor compensated
8. Extract air outdoor compensated
9. Extract air dependent supply air
The supply air temperature controller is reverse acting, i e. the output will increase for decreasing temperature. The controller is a PID-controller with settable P-band, I-time and D-time.
Figure 4-1 Application tool menu path to temperature control
In the first mode, the temperature at the supply air sensor will be constantly kept at the user setpoint value.
In the second mode, the supply air temperature setpoint is adjusted depending on the outdoor temperature.
In modes three and four the supply air is controlled as part of a cascade controller together with the room/ extract temperature controller. The room/extract temperature offset will dictate the supply air temperature setpoint.
Mode five and six vary according to the outdoor temperature: Outdoor temperature compensated supply air control, as in mode two, in winter and cascaded room control or cascaded extract air control in summer, as in modes three or four. The switch-over temperature is settable.
A neutral zone can be set around the setpoint value.
Example: If the setpoint is 18 °C and the neutral zone is 2 K, the cooling setpoint will be 19 °C and the heating setpoint will be 17 °C (FS=0 K). If the supply air temperature is in the neutral zone, the heating and cooling will be blocked. If the supply air temperature decreases below the setpoint –NZ/2 the heating signal will be active until setpoint is fulfilled. If the supply air temperature increases above the setpoint +NZ/2 the cooling signal will be active until setpoint is fulfilled.
Corrigo manual, Rev. D 33 (196)
Information for the specialist - Function descriptions
Alarms which are activated when the supply air temperature is too high or too low are active.
Alarm for control offset of the supply air temperature is active.
4.2.2
Control modes
Read more about configuration of the control modes in chapter 5.6,
Supply air control
The supply air temperature is kept at the setpoint value by controlling the output signals for sequences A to
J. A single PI control loop is used.
The actual setpoint for the supply air temperature will be limited to a settable minimum and maximum.
Settings and configuration for Supply air control
Table 4-1 Path to configuration and settings for Supply air control
Feature
Supply air control
Sequence configuration
Starting order heating/cooling
Add supply air temperature sensor
Configure input
Sensor type selection
Controller output
Neutral zone setting
Min / Max limit supply air
Setpoint supply air
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Sequence A to J
Temperature control type
Configuration ► Functions ►
Sequence heating and
Sequence cooling
Configuration ► Functions ►
Temperature control
Configuration ► Analog inputs
► Supply air temperature
Configuration ► Analog inputs
► Supply air temperature
Ventilation ► Actual / Setpoint
► Supply air controller
Ventilation ► Actual / Setpoint
► Supply air controller
Ventilation ► Actual / Setpoint
► Supply air controller
Ventilation ► Actual / Setpoint
► Supply air controller
Supply air temperature sensor
(Yes/ No) (
Sensor type
Controller output (%)
Neutral zone (C°)
Min / Max limit supply air (C°)
Setpoint supply air
Note
Selection of temperature control
Required inputs for Supply air control
Inputs and outputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs Supply air temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
34 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Supply air outdoor compensated
The supply air temperature setpoint is temperature compensated using a control curve with 8 node points, see
Figure 4-2 Temperature compensation curve
below.
Figure 4-2 Temperature compensation curve
The default settings for the 8 node points are shown in
below:
Table 4-2 Default settings for compensation curve
Outdoor temperature (°C)
5
10
15
- 20
-15
-10
-5
0
Setpoint supply temperature
25
24
23
23
22
20
18
18
The supply air temperature is kept at the setpoint value by controlling the output signals for sequence A to J.
A single PI control loop is used.
Alarms which are activated when the supply air temperature is too high or too low are active.
Alarm for control offset of the supply air temperature is active.
Settings and configuration for Supply air outdoor compensated control
Table 4-3 Path to configuration and settings for Supply air outdoor compensated
Feature
Supply air outdoor compensated control
Sequence configuration
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Sequence A to J
Temperature control type
Note
Selection of temperature control
Corrigo manual, Rev. D 35 (196)
Information for the specialist - Function descriptions
Table 4-3 Path to configuration and settings for Supply air outdoor compensated (continued)
Feature
Starting order heating/cooling
Add supply air temperature sensor
Configure input
Sensor type selection
Controller output
Setpoint outdoor curve (X, Y)
Neutral zone setting
Min / Max limit supply air
Menu path in Application tool Variable
Configuration ► Functions ►
Starting order heating and
Starting order cooling
Supply air temperature sensor
(Yes/ No)
Configuration ► Functions ►
Temperature control
Configuration ► Analog inputs
► Supply air temperature
Configuration ► Analog inputs
► Supply air temperature
Ventilation ►Actual / Setpoint
► Supply air controller
Ventilation ► Actual / Setpoint
► Supply air controller
Ventilation ► Actual / Setpoint
► Supply air controller
Ventilation ► Actual / Setpoint
► Supply air controller
Sensor type
Controller output (%)
Neutral zone (C°)
Min / Max limit supply air (C°)
Note
Required inputs for Supply air outdoor compensated
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs ✓ Supply air temperature
✓ Outdoor temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Room cascade
Cascade control of room temperature and supply air temperature to achieve a constant, settable room temperature. The room controller output signal (0-100%) generates the supply air controller’s setpoint value between min and max supply setpoint.
Up to 16 room sensors can be connected. A final value will be calculated from the values of the configured room sensors. Different types of calculation are available, such as:
✓ select the lowest value
✓ select the highest value
✓ calculated the average
✓ calculate the average with the lowest and the highest value
✓ calculate the middle value (median)
The room temperature is kept at the setpoint value by controlling the output signals for A to J. Two PI loops are used.
36 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Settings and configuration for Room cascade control
Table 4-4 Path to configuration and settings for Room cascade
Feature
Room cascade control
Sequence configuration
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Sequence A to J
Temperature control type
Starting order heating/cooling Configuration ► Functions ►
Starting order heating and
Starting order cooling
Add room temperature sensor Configuration ► Functions ►
Temperature control
Select the type of average calculation
Setting of P-band and I-time
Configuration ► Functions ►
Temperature control
Setpoint room temperature
Setpoint adjustment
Room temperature sensor
Room temperature average
Ventilation ► PID controllers ►
Room
Ventilation ► Actual / Setpoint
► Room controller
Ventilation ► Actual / Setpoint
► Room controller
Setpoint room temperature
Setpoint adjustment
Note
Selection of temperature control
0…16
Type of average calculation
Required inputs for Room cascade
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs ✓ Room temperature 1…16
✓ Supply air temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Extract air cascade
Cascade control of extract air temperature and supply air temperature to achieve a constant, settable room temperature. The extract air controller output signal (0-100%) generates the supply air controller’s setpoint value between min and max supply setpoint.
The extract air temperature is kept at the setpoint value by controlling the output signals for A to J. Two PI loops are used.
Settings and configuration for Extract air cascade control
Table 4-5 Path to configuration and settings for Extract air cascade
Feature
Extract air cascade control
Sequence configuration
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Sequence A to J
Temperature control type
Starting order heating/cooling Configuration ► Functions ►
Starting order heating and
Starting order cooling
Add extract air temperature sensor
Configuration ► Functions ►
Temperature control
Extract air temperature sensor
Note
Selection of temperature control
Yes / No
Corrigo manual, Rev. D 37 (196)
Information for the specialist - Function descriptions
Table 4-5 Path to configuration and settings for Extract air cascade (continued)
Feature
Configure Input
Menu path in Application tool Variable
Configuration ► Analog inputs
► Extract air temperature
Setting of P-band and I-time Ventilation ► PID controllers ►
Extract air
Setpoint extract air temperature Ventilation ► Actual / Setpoint
► Extract air controller
Setpoint adjustment Ventilation ► Actual / Setpoint
► Extract air controller
Setpoint extract air
Setpoint adjustment
Required inputs for Extract air cascade
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs ✓ Extract air temperature
✓ Supply air temperature
Note
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Room (summer) else supply air outdoor compensated
Summer mode dependent switching between outdoor compensated supply air temperature control and room cascade control.
When the summer mode function is off, outdoor temperature compensated supply air temperature control will be active. In summer mode it will be cascaded room temperature control that is active. The summer mode function is used for switching control mode.
Settings and configuration for Room (summer) else supply air
Table 4-6 Path to configuration and settings for Room (summer) else supply air
Feature
Room (summer) else supply air control
Sequence configuration
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Sequence A to J
Temperature control type
Starting order heating/cooling Configuration ► Functions ►
Starting order heating and
Starting order cooling
Summer mode settings
Add supply air temperature/ room temperature sensor
Configuration ► Functions ►
Temperature control
Configuration ► Functions ►
Temperature control
Activate summer mode
Supply air temperature sensor
(Yes/ No / Room temperature sensor (1…16))
Configure Input
Sensor type selection
Setting of P-band and I-time
Setpoint room temperature
Configuration ► Analog inputs
► Supply air temperature
Configuration ► Analog inputs
► Supply air temperature
Ventilation ► PID controllers ►
Room
Ventilation ► Actual / Setpoint
► Room controller
Setpoint room temperature
Note
Selection of temperature control
38 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Required inputs for Room (summer) else supply air
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs
✓ Supply air temperature
✓ Room temperature 1…16
✓ Outdoor temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Extract air (summer) else supply air outdoor compensated
Summer mode dependent switching between outdoor compensated supply air temperature control and extract air cascade.
When the summer mode function is off, outdoor temperature compensated supply air temperature control will be active, otherwise cascaded extract temperature control as in control mode 4. Summer mode function is used for switching control mode.
Settings and configuration for Extract air (summer) else supply air
Table 4-7 Path to configuration and settings for Extract air (summer) else supply air outdoor compensated
Feature
Extract air (summer) else supply air control
Sequence configuration
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Temperature control type
Configuration ► Functions ►
Sequence A to J
Starting order heating/cooling Configuration ► Functions ►
Starting order heating and
Starting order cooling
Summer mode settings Configuration ► Functions ►
Temperature control
Add extract air temperature sensor
Configuration ►Functions
►Temperature control
Activate summer mode
Supply air temperature sensor
(Yes/ No / Room temperature sensor (1…16)
Configure Input
Sensor type selection
Configuration ► Analog inputs
► Extract air temperature
Configuration ► Analog inputs► Supply air temperature
Setting of P-band and I-time Ventilation ► PID controllers ►
Extract air
Setpoint extract air temperature Ventilation ► Actual / Setpoint
► Extract air controller
Setpoint extract air
Note
Selection of temperature control
Required inputs for Extract air cascade (summer) else supply air
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs
✓ Extract air temperature
✓ Supply air temperature
✓ Outdoor temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Corrigo manual, Rev. D 39 (196)
Information for the specialist - Function descriptions
Room outdoor compensated
Cascade control of the room temperature and supply air temperature to achieve an outdoor compensated room temperature.
The room temperature setpoint is temperature compensated using a control curve with 8 node points, see the curve below in
Figure 4-3 Temperature compensation curve .
The default settings for the 8 node points are shown in table
below:
Figure 4-3 Temperature compensation curve
Table 4-8 Default settings for compensation curve
Outdoor temperature (°C)
5
10
15
- 20
-15
-10
-5
0
Setpoint supply temperature
25
24
23
23
22
20
18
18
Settings and configuration for Room outdoor compensated control
Table 4-9 Path to configuration and settings for Room outdoor compensated
Feature
Room outdoor compensated
Sequence configuration
Starting order heating/cooling
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Sequence A to J
Temperature control type
Configuration ► Functions ►
Starting order heating and
Starting order cooling
Note
Selection of temperature control
40 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-9 Path to configuration and settings for Room outdoor compensated (continued)
Feature
Add room temperature sensor
Menu path in Application tool Variable
Configuration ► Functions ►
Temperature control
Room temperature sensor
Configure input Configuration ► Analog inputs
► Outdoor temperature
Setting of P-band and I-time
Setpoint adjustment
Ventilation ► PID controllers ►
Room
Ventilation ► Actual / Setpoint
► Room controller
Setpoint outdoor curve ( X, Y ) Ventilation ► Actual / Setpoint
► Room controller
Setpoint adjustment
✓ Setpoint outdoor curve X
(1…4)
✓ Setpoint outdoor curve Y
(1…4)
Note
0…16
Required inputs for Room outdoor compensated
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs ✓ Outdoor temperature
✓ Room temperature 1…16
✓ Supply air temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Extract air outdoor compensated
Cascade control of the extract air temperature and supply air temperature to achieve an outdoor compensated extract air temperature.
The supply air temperature setpoint is temperature compensated using a control curve with 8 node points, see the curve below in
Figure 4-4 Temperature compensation curve
.
Figure 4-4 Temperature compensation curve
Corrigo manual, Rev. D 41 (196)
Information for the specialist - Function descriptions
The default settings for the 8 node points are shown in table
Table 4-8 Default settings for compensation curve
below:
Table 4-10 Default settings for compensation curve
Outdoor temperature (°C)
0
5
10
15
- 20
-15
-10
-5
Setpoint supply temperature
22
20
18
18
25
24
23
23
Settings and configuration for Extract air outdoor compensated control
Table 4-11 Path to configuration and settings for Extract air outdoor compensated
Feature
Extract air outdoor compensated
Sequence configuration
Starting order heating/cooling
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Temperature control type
Configuration ► Functions ►
Sequence A to J
Configuration ► Functions ►
Starting order heating and
Starting order cooling
Note
Selection of temperature control
Add extract air temperature sensor
Configure input
Configuration ► Functions ►
Temperature control
Configuration ► Analog inputs
► Extract air temperature
Extract air temperature sensor
Setpoint outdoor curve ( X, Y ) Ventilation ► Actual / Setpoint
► Extract air controller
✓ Setpoint outdoor curve X
(1…4)
✓ Setpoint outdoor curve Y
(1…4)
Setting of P-band and I-time Ventilation ► PID controllers ►
Extract air
Setpoint extract air temperature Ventilation ► Actual / Setpoint
► Extract air controller
Setpoint adjustment Ventilation ► Actual / Setpoint
► Extract air controller
Setpoint extract air
Setpoint adjustment
0…16
Required inputs for Extract air outdoor compensated
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs ✓ Extract air temperature
✓ Outdoor temperature
✓ Supply air temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
42 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Extract air dependent supply air
A difference between extract air temperature and supply air temperature can be configured to maintain the supply air temperature setpoint to follow extract air temperature with this difference (+10°C to -10°C).
Supply air temperature setpoint = extract air temperature + difference .
Settings and configuration for Extract air dependent supply air
Table 4-12 Path to configuration and settings for Extract air dependent supply air
Feature
Extract air dependent supply air Configuration ► Functions ►
Sequence configuration
Menu path in Application tool Variable
Temperature control type
Function activation
Configuration ► Functions ►
Sequence A to J
Starting order heating/cooling Configuration ► Functions ►
Starting order heating and
Starting order cooling
Add extract air / supply air temperature sensor
Configuration ► Functions ►
Temperature control
✓ Extract air temperature sensor
✓ Supply air temperature sensor
Configure input Configuration► Analog input ►
Extract air temperature/Supply air temperature
Setting of P-band and I-time Ventilation ► PID controllers ►
Extract air
Setpoint extract air temperature Ventilation ► Actual/Setpoint ►
Extract air controller
Setpoint extract air
Setpoint adjustment Ventilation ► Actual/Setpoint►
Extract air controller
Setpoint adjustment
Setpoint temperature difference Ventilation ► Actual/Setpoint ►
Supply air controller
Setpoint delta T extract air supply air (°C)
Note
Selection of temperature control
0…16
Required inputs for Extract air dependent supply air
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs
✓ Extract air temperature
✓ Supply air temperature
Settings
✓ Terminal
✓ Name
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Corrigo manual, Rev. D 43 (196)
Information for the specialist - Function descriptions
4.3 Temperature sequences
Figure 4-5 Configuration - Functions - Sequences
The supply air controller output is either a heating demand or a cooling demand depending on if the supply temperature is over or under the setpoint. This demand is then divided into up to 10 sequences A to J. Each sequence can be configured as Heating , Cooling , Exchanger , Damper , Fan setpoint compensation or Not used .
(See
for more information about configuration).
Figure 4-6 Sequence types
Each sequence has it own PID-settings that can be set in the Ventilation section of Application tool.
Each of these output sequences can be bound to either an analogue output, to two digital 3-position increase/decrease outputs, to one pulse-width modulated (PWM) digital output with a settable period time, or to a start/stop digital output with configurable start and stop limits.
44 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
4.3.1
Heater (Sequence A)
Sequence A is set to Heater as default, but can be changed
Heater types
Figure 4-7 Path to selection of heater types
Water heating
Control
If a sequence is configured as water heating, it’s possible to select if the sequence should be controlled with freeze protection and which freeze protection sensor (1…3) that should be used. The sequence is controlled by the corresponding sequence analogue output or by two digital outputs: 3-position actuator; increase and decrease.
Table 4-13 Settings and configuration for water heater
Feature
Water heater
Menu path in Application tool Variable
Configuration ► Functions ►
Heater (Sequence A) or other sequence configured as heater
Type of heater
Type of freeze protection Freeze protection Configuration ► Functions ►
Heater (Sequence A) or other sequence configured as heater
Select freeze protection temperature sensor
Configuration ► Functions ►
Heater (Sequence A) or other sequence configured as heater
Freeze protection temperature sensor (1, 2 or 3)
Sequence start order Configuration ► Functions ►
Starting order heating
Freeze protection temperature Configuration ► Analog inputs
► Freeze protection temperature 1…3
✓
✓
✓
Sensor type
Filter factor
Compensation
✓ Mode
✓ Manual
✓ Actual value
Note
Corrigo manual, Rev. D 45 (196)
Information for the specialist - Function descriptions
Table 4-13 Settings and configuration for water heater (continued)
Feature
Analogue output
Digital outputs
Menu path in Application tool Variable
Configuration ► Analog output
► Heater (Sequence A) or other sequence configured as heater
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Configuration ► Digital outputs
► Sequence A increase /
Sequence A decrease
✓ NC (Normally closed)
✓ NO (Normally open)
Note
Table 4-14 Required outputs for water heater
Outputs
AO
DO
Menu path in Application tool Name Settings
Configuration ► Analog output Heater (Sequence A) or other sequence configured as heater
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Configuration ► Digital outputs Sequence A increase/Sequence
A decrease
✓ NC (Normally closed)
✓ NO (Normally open)
Freeze protection
The heater return water temperature is measured using the analog input Freeze protection temperature 1…3 or the digital input Freeze protection guard , depending on the selection of freeze protection ( Configuration ►
Heater (Sequence A) ► Type of freeze protection ). Low temperatures will generate an internal, proportional signal that is used to force the heating valve open, thereby preventing freeze-up of the heater.
The internal signal will begin to rise as the frost protection temperature falls below the Alarm limitation running mode + P-band running mode in order to reach 100 % output when the signal has fallen to Alarm level .
When the internal signal reaches 100 % or the digital input Freeze protection guard is activated, the unit is shut down, the heating output is set to completely open mode and an alarm is activated. .
protection sensor has risen above Alarm limitation running mode + P-band running mode .
Freeze protection control is available on all sequences A to J.
46 (196) Corrigo manual, Rev. D
Internal signal
100 %
Information for the specialist - Function descriptions
Prop. band
0 %
Alarm level Freeze protection sensor
Figure 4-8 Freeze protection
Table 4-15 Settings and configuration for freeze protection
Feature
Water heater
Menu path in Application tool Variable
Configuration ► Functions ►
Heater (Sequence A) (or other sequence configured as heater)
Type of heater
Note
✓ Inactive
✓ Water
✓ Electric
✓ DX
✓ Combi coil
✓ Temperature sensor
✓ Freeze guard
✓ Sensor + Guard
Freeze protection
Freeze protection temperature sensor
Configuration of freeze protection temperature,
Freeze protection setpoints
PID-settings
Configuration ► Functions ►
Heater (Sequence A) (or other sequence configured as heater)
Type of freeze protection
Configuration ► Functions ►
Heater (Sequence A) (or other sequence configured as heater)
1…3
Configuration ► Analog inputs
► Freeze protection temperature 1…3
Ventilation ► Temperature control ► Freeze protection 1…
3
✓ Alarm limitation running mode
✓ P-band running mode
✓ Setpoint standby mode
Ventilation ► PID-controllers ►
Freeze protection 1…3
✓ Sensor type
✓ Filter factor
✓ Compensation
✓ Mode
✓ Manual
✓ Actual value (read only)
Table 4-16 Required inputs for freeze protection
Inputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs Freeze protection temperature
1…3
Settings
✓ Sensor type
✓ Filter factor
✓ Compensation
✓ Mode
✓ Manual
✓ Actual value (read only)
Corrigo manual, Rev. D 47 (196)
Information for the specialist - Function descriptions
N Freeze protection guard and an activated. The heating sequence output is set to completely open, the remaining control outputs are set to zero.
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 1…3
Electric heating
Electric heating is controlled using the analogue output sequence A to J. On activation of the digital input
Overheated electric heater the unit will be shut down, either according to the stop sequence described in section
5.13 Starting and stopping the Corrigo
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.
Control voltage
Relay electric heating
High limit thermostat
Corrigo
Control voltage
Auxiliary relay
Figure 4-9 Wiring example, high temp limit. Contactors are drawn inactivated.
the heater to ensure that the heating is shut down when the thermostat is activated even if the
Corrigo should be faulty.
Table 4-17 Settings and configuration for electric heating
Feature
Electric heater
Overheating
Flow guard
Alarm
Menu path in Application tool Variable
Configuration ► Functions ►
Heater (Sequence A) (or other sequence configured as heater)
Type of heater
Configuration ► Digital inputs
► Overheated electric heater
Configuration ► Digital inputs
► Flow guard
Alarm status
Note
48 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-18 Required inputs for electric heating
Inputs
DI
Menu path in Application tool Name
Configuration ► Digital input ✓ Overheated electric heater
✓ Flow guard
Settings
Fast stop on overheating
Fast stop is an option in Alarm 63 - Electric heating is overheated . The function means that the fans will be immediately stopped when there is an overheating alarm, regardless of the set cool-down time. It is set in
Alarm status ► 63 Electric heating is overheated ► Edit ► Alarm action.
DX Heater
A DX heater is used together with DX cooler in case of controlling a reversible heat pump.
The heat pump can be switched between heating and cooling. The type of heater sequence needs to be set to
DX and the type of cooler sequence to either DX or DX with exchanger control .
Both sequences are combined with a change-over function.
Inputs and outputs used for controlling the reversible heat pump:
Table 4-19 Required inputs and outputs for controlling the reversible heat pump
Inputs and outputs
DI
AO
DO
Menu path in Application tool Name
Configuration ► Digital inputs ✓ Feedback cooling sequence
✓ Lock PID controller supply
Configuration ► Analog outputs
Change-over 1/2
Configuration ► Digital outputs ✓ Change-over 1/2
✓ Cooling sequence
Note
Inputs and outputs for heater types
Water heating
AI
Electric heating
DI
AO
DO
DI
DI
AO
DO
DX heating
AO
DO
Freeze protection sensor 1…3
(optional)
Freeze protection thermostat
1…3 water heater (optional)
Overheated electric heater
Flow switch (optional)
Sequence x
✓ Sequence x start
✓ Sequence x PWM
✓ Sequence x increase
✓ Sequence x decrease
✓ Sequence x pump
Corrigo manual, Rev. D 49 (196)
Information for the specialist - Function descriptions
4.3.2
Exchanger (Sequence B)
Sequence B is set to Exchanger by default but can be changed.
The heat exchanger unit can be set to one of the following alternatives:
Figure 4-10 Exchanger alternatives
Rotating exchanger
Control
Rotational speed is controlled by the analogue signal Sequence A to J. A rotation guard can be connected to the digital input Rotary exchanger alarm (Alarm 67 Rotary changer alarm in the Alarm status). An alarm is generated if this input is not activated at the same time as the analogue output signal is higher than 1.0 V.
Freeze protection
A defrosting sensor or an exhaust air temperature sensor can be used as a prevention sensor. It is possible to set a starting temperature in Ventilation ► Temperature control ► Exchanger ► Defrosting setpoint min limit 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.
Outdoor temperature control of exchanger
Instead of using Sequence A to J for analogue control of the heat exchanger it can be set to run on-off against outdoor temperature. The function controls a digital output Outdoor controlled exchanger , which is activated when the outdoor temperature falls below a set value.
50 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Settings and configuration for rotating exchanger
Table 4-20 Rotating exchanger, settings and configuration
Feature
Rotating exchanger
Temperature setpoints
Note
Analog output signal
Defrosting
Configuration ► Analog outputs
► Sequence A to J
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Configuration ► Functions ►
Temperature control
Defrosting exchanger
Defrosting temperature sensor Configuration ► Functions ►
Temperature control
Defrosting temperature sensor Defrosting sensor
Exhaust air temperature
Outdoor control
Menu path in Application tool Variable
Configuration ► Functions ►
Exchanger (Sequence B) (or other sequence configured as exchanger)
Type of exchanger
Configuration ► Digtal outputs
► Outdoor controlled exchanger
Ventilation ► Temperature control ► Exchanger
Hysteresis setpoints Ventilation ► Temperature control ► Exchanger
Outdoor start/stop exchanger temperature
Defrosting setpoint min limit
Stop supply air fan if outdoor temp <
Hysteresis
Hysteresis to stop defrosting
Delay setpoints Ventilation ► Temperature control ► Exchanger
Start delay exchanger
Start delay with 100 % exchanger
Start alarm delay
Plate exchanger
Control
The airflow through the exchanger is controlled by a shut-off damper and a by-pass damper. Both dampers are controlled by the same analogue output Sequence A to J or by two types of digital outputs: Sequence A to J PWM or 3-position actuator; increase and decrease ( Sequence A to J increase/decrease )and are wired so that one opens as the other closes.
Defrosting
Defrosting is activated either when the digital signal Defrosting is activated in Application tool or when the value of the analogue input Defrosting temperature falls below the de-icing limit (-3°C), or when the analogue signal Pressure extract air rises above the set value for the current pressure.
It is deactivated when the digital signal is reset, or alternatively when the analogue signal rises above the limit value plus a settable differential ( Ventilation ► Temperature control ► Exchanger ► Hysteresis to stop defrosting ).
It’s also possible to use Exhaust air temperature instead of Defrosting temperature for the defrosting function
( Configuration ► Functions ► Temperature control ► Defrosting temperature sensor ).
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.
If the digital input signal Defrosting guard exchanger is activated the exchanger is blocked, it will stay blocked as long as the digital input signal is active.
Corrigo manual, Rev. D 51 (196)
Information for the specialist - Function descriptions
Freeze protection
A defrosting sensor or an exhaust air temperature sensor can be used as a prevention sensor. It is possible to set a starting temperature in Ventilation ► Temperature control ► Exchanger ► Defrosting setpoint min limit 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 4-21 Configuration and settings for Plate exchanger
Feature
Plate exchanger
Damper control, Analog Output Configuration ► Analog output
► Sequence B (exchanger) or other sequence configured as exchanger
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
3-position increase / decrease outputs
Configuration ► Digital outputs
► Sequence A to J increase / decrease
PWM with settable period time Configuration ► Digital outputs
► Sequence A to J PWM
✓ NC (Normally closed )
✓ NO (Normally open)
✓ NC (Normally closed )
✓ NO (Normally open)
PWM period time Period time for PWM signal
Defrosting
Configuration ► Functions ►
Sequence A to J
Configuration ► Functions ►
Exchanger (Sequence B or other sequence configured as exchanger
Defrosting mode
Defrosting sensor
Defrosting exchanger
Defrosting temperature
Menu path in Application tool Variable
Configuration ► Functions ►
Sequence B (exchanger) or other sequence configured as exchanger
Type of exchanger
Configuration ► Functions ►
Temperature control
Configuration ► Functions ►
Temperature control
Configuration ► Analog inputs
► Defrosting temperature
Defrosting temperature sensor
Defrosting exchanger
Extract air fan speed when defrosting
Configuration ► Functions ►
Temperature control
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
✓ Actual value (°C)
Extract air fan speed when defrosting with stopped supply air
Note
Yes / No
✓ Auto
✓ Low
✓ Normal
✓ High
Pressure extract air
Exhaust air temperature
Configuration ► Analog inputs
► Pressure extract air
Configuration ► Analog inputs
► Exhaust air temperature
Temperature setpoints Ventilation ► Temperature control ► Exchanger
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
✓ Actual value (°C)
✓ Outdoor start / stop exchanger temperature (°C)
✓ Defrosting setpoint limit (°C)
✓ Stop supply air time if outdoor temp < (°C)
52 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-21 Configuration and settings for Plate exchanger (continued)
Feature
Hysteresis setpoints
Delay setpoints
Menu path in Application tool Variable
Ventilation ► Temperature control ► Exchanger
✓ Hysteresis (°C)
✓ Hysteresis to stop defrosting
(°C)
Note
Ventilation ► Temperature control ► Exchanger
✓ Start delay exchanger (s)
✓ Start delay with 100 % exchanger (s)
✓ Start alarm delay (s)
Liquid exchanger
Control
A mixing valve in the exchanger circulation system is controlled by the analog signal sequence A to J or by two types of digital outputs: Sequence A to J PWM or 3-position actuator; increase and decrease ( Sequence A to J increase/decrease ).
The circulation pump is started as soon as the actuator control signal exceeds 0.1 V and is stopped when the valve has been closed for more than 5 minutes. ( Ventilation ► Temperature control ► Sequence X ► Pump stop delay )
Defrosting
Defrosting is activated either when the digital input signal Defrosting guard exchanger is activated or when the value of the analog input Defrosting temperature falls below the deicing limit (-3°C). It is deactivated when the digital input is reset, or the analog input rises above the limit value plus a settable differential.
( Ventilation ► Temperature control ► Exchanger ► Hysteresis to stop defrosting )
On defrosting:
A PI-controller compares the defrosting setpoint with the signal from the Defrosting temperature sensor or
Exhaust air temperature sensor ( Configuration ► Functions ► Temperature control ). The lesser of the output signal from this controller and the output from the ordinary controller is used as output to the actuator.
If the digital input signal Defrosting guard exchanger is activated the exchanger is blocked, it will stay blocked as long as the digital input signal is active.
Function to prevent the heat exchanger from freezing:
A defrosting sensor or an exhaust air temperature sensor can be used as a prevention sensor. It is possible to set a starting temperature in Ventilation ► Temperature control ► Exchanger ► Defrosting setpoint min limit 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.
Outdoor temperature control of exchanger
Instead of using Sequence A to J for analogue control of the heat exchanger it can be set to run on-off against outdoor temperature. This function is activated when you configure the digital output Outdoor controlled exchanger . The digital output is available if the Outdoor temperature sensor in Configuration ► Functions ►
Temperature control is set to anything else than No .
The digital output is activated when the outdoor temperature falls below a set value. The temperature setpoint is set in the Analog input Outdoor temperature or Intake air temperature , depending on the configuration.
Corrigo manual, Rev. D 53 (196)
Information for the specialist - Function descriptions
Configuration and settings for Liquid exchanger
Table 4-22 Configuration and settings for Liquid exchanger
Feature
Liquid exchanger
Menu path in Application tool Variable
Configuration ► Functions ►
Sequence B (exchanger) or other sequence configured as exchanger
Type of exchanger
Damper control, Analog Output Configuration ► Analog output
► Sequence B (exchanger) or other sequence configured as exchanger
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
3-position increase / decrease outputs
Configuration ► Digital outputs
► Sequence A to J increase / decrease
PWM with settable period time Configuration ► Digital outputs
► Sequence A to J PWM
✓ NC (Normally closed )
✓ NO (Normally open)
✓ NC (Normally closed )
✓ NO (Normally open)
PWM period time Period time for PWM signal
Defrosting
Configuration ► Functions ►
Sequence A to J
Configuration ► Functions ►
Sequence B (exchanger) or other sequence configured as exchanger
Defrosting mode
Defrosting sensor
Defrosting exchanger
Defrosting temperature
Configuration ► Functions ►
Temperature control
Configuration ► Functions ►
Temperature control
Configuration ► Analog inputs
► Defrosting temperature
Defrosting temperature sensor
Defrosting exchanger
Extract air fan speed when defrosting
Configuration ► Functions ►
Temperature control
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
✓ Actual value (°C)
Extract air fan speed when defrosting with stopped supply air
Note
Yes / No
✓ Auto
✓ Low
✓ Normal
✓ High
Outdoor controlled exchanger Configuration ► Digital outputs
► Outdoor controlled exchanger
✓ NC (Normally closed )
✓ NO (Normally open)
Exhaust air temperature Configuration ► Analog inputs
► Exhaust air temperature
✓ Sensor type
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
✓ Actual value (°C)
Temperature setpoints Ventilation ► Temperature control ► Exchanger
✓ Outdoor start / stop exchanger temperature (°C)
✓ Defrosting setpoint limit (°C)
✓ Stop supply air fan if outdoor temp < (°C)
Hysteresis setpoints Ventilation ► Temperature control ► Exchanger
✓
✓
Hysteresis (°C)
Hysteresis to stop defrosting
(°C)
Delay setpoints Ventilation ► Temperature control ► Exchanger
✓
✓
Start delay exchanger (s)
Start delay with 100 % exchanger (s)
✓ Start alarm delay (s)
54 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Exchanger and damper sequence
If both an exchanger sequence and a damper sequence is configured, the exchanger sequence will stop when the damper sequence reaches 100 %.
Inputs and outputs for exchanger types
Rotating
AI
DI
Plate
AI
DI
DI
DI
AO 1
DO 1
AO 1
DO 1
Liquid
AI
DI
DI
AO 1
DO 1
DO 1
Description
Defrosting temperature
Feedback sequence x
Defrosting guard exchanger
Rotary exchanger alarm
Sequence x analog output
✓ Sequence x PWM
✓ Sequence x increase/ decrease
✓ Sequence x start
Sequence x pump
1. Depending on type of sequence output
4.3.3
Cooler (Sequence C)
Sequence C is set to Cooling as default, but it can be changed to any sequence.
Water cooling
Control
If a sequence is configured as water cooling, it’s controlled by the corresponding sequence analog output or by two digital outputs; 3-position actuator; increase and decrease.
Table 4-23 Settings and configuration for water cooling
Feature
Water cooling
Analogue output
Digital output
PID settings
Sequence start order
Menu path in Application tool Variable
Configuration ► Functions ►
Cooler (Sequence C) or other sequence configured as cooler
Type of cooler
Configuration ► Analog outputs
► Cooler (Sequence C) or other sequence configured as cooler
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Configuration ► Digital outputs
► Sequence C increase / decrease
Ventilation ► PID controllers ►
Cooler (sequence C)
✓ NC (Normally closed)
✓ NO (Normally open)
Configuration ► Functions ►
Sequence cooling
Description
DX cooling with room or extract air control
If DX cooling is used in conjunction with room temperature control or extract air temperature control, there are two configuration alternatives, DX cooling or DX cooling with exchanger control.
Corrigo manual, Rev. D 55 (196)
Information for the specialist - Function descriptions
DX cooling
When running cascade control, the supply air controller setpoint is normally controlled by the room/extract air controller output signal.
When DX cooling is activated, the supply air controller setpoint is lowered to five degrees (adjustable) below the setpoint given by the room/extract air controller. This prevents the DX cooling from being activated/deactivated too often.
Table 4-24 Settings and configuration for DX cooling
Feature
DX cooling
Supply air controller setpoint for
DX
Setpoint Room / Extract air
Menu path in Application tool Variable
Configuration ► Functions ►
Cooler (Sequence C) or other sequence configured as cooler
Type of cooler
Ventilation ► Actual / Setpoint
► Supply air controller
Ventilation ► Actual / Setpoint
► Room controller/ Extract air controller
Reduction of min limit supply air if active DX-cooling (°C)
✓
✓
✓
Setpoint adjustment
Setpoint room / extract air
Actual setpoint
✓ Controller output
Note
DX cooling with exchanger control
When running cascade control, the supply air controller setpoint is normally controlled by the room/extract air controller output signal.
When DX cooling is activated, the supply air controller setpoint is lowered to five degrees (adjustable) below the setpoint given by the room/extract air controller. This prevents the DX cooling from being activated/deactivated too often.
If the supply air temperature falls below the setpoint given by the room/extract air controller, the heat exchanger output will be activated in order to try to maintain the supply air setpoint given by the room/ extract air controller. The output uses P-control with a P-band of half the setpoint lowering (adjustable, 2.5°
C as default). The setpoint given by the room/extract air controller cannot drop below the set min limit.
When there is no longer a cooling demand, the supply air controller setpoint will return to the value given by the room/extract air controller.
Example:
The room controller gives a supply air setpoint of 16°C. If there is a cooling demand, the supply air controller setpoint is lowered to 11°C (16 – 5) and DX cooling is activated. Should the supply air temperature fall below 16°C, the exchanger output will be activated and reach 100 % output when the supply air temperature has fallen to 13.5°C (16 - 2.5).
Table 4-25 Settings and configuration for DX cooling with exchanger control
Feature
DX cooling
Menu path in Application tool Variable
Configuration ► Functions ►
Cooler (Sequence C) or other sequence configured as cooler
Type of cooler
Supply air controller setpoint for
DX
Ventilation ► Actual / Setpoint
► Supply air controller
Reduction of min limit supply air if active DX-cooling (°C)
Note
56 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-25 Settings and configuration for DX cooling with exchanger control (continued)
Feature
Setpoint Room / Extract air
Heat exchanger output
P-band
Menu path in Application tool Variable
Ventilation ► Actual / Setpoint
► Room controller/ Extract air controller
✓ Setpoint adjustment
✓ Setpoint room / extract air
✓ Actual setpoint
✓ Controller output
Configuration ► Analog outputs
► Exchanger (Sequence B)
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Ventilation ► PID controllers ►
Exchanger (Sequence B) /
Cooler (Sequence C)
Note
Blocking of DX cooling at low outdoor temperature
DX cooling can be blocked when the outdoor temperature is low. It is possible to block the four cooling steps individually or to block all DX cooling. The temperature limits are adjustable (+13°C default) and have a fixed one degree hysteresis.
When two DX cooling steps are used with binary function, the cooling effect is divided into three steps. The desired blocking level can be set individually for each of these steps.
When three DX cooling steps are used with binary function, the cooling effect is divided into seven steps.
However, the controller still only has four blocking level settings. Therefore, Blocking step 1 will apply to binary steps 1 and 2, Blocking step 2 to binary steps 3 and 4, Blocking step 3 to binary steps 5, 6 and Blocking step 4 to binary steps 7.
When four DX cooling steps are used with binary function, the cooling effect is divided into fifteen steps.
However, the controller still only has four blocking level settings. Therefore, Blocking step 1 will apply to binary steps 1-4, Blocking step 2 to binary steps 5-8, Blocking step 3 to binary steps 9-12 and Blocking step 4 to binary steps 13-15.
Table 4-26 Settings and configuration for blocking DX cooling at low outdoor temperature
Feature
Block DX cooling
Hysteresis
Menu path in Application tool Variable
Ventilation ► Temperature control ► Step Controller 1/2
Block step x if outdoor temperature < (°C)
Note
Ventilation ► Temperature control ► Step Controller 1/2
Block DX-cooling if outdoor temperature < (°C)
Blocking of DX cooling at low supply air fan speed
When DX cooling is used in conjunction with pressure controlled or flow controlled fans it is possible to block DX cooling if the supply air fan control signal falls below a preset values. For sequential control, the blocking level is individually settable for each DX cooling step.
When two DX cooling steps are used with binary function, the cooling effect is divided into three steps. The desired blocking level can be set individually for each of these steps.
When three DX cooling steps are used with binary function, the cooling effect is divided into seven steps.
However, the controller still only has four blocking level settings. Therefore, Blocking step 1 will apply to binary steps 1 and 2, Blocking step 2 to binary steps 3 and 4, Blocking step 3 to binary steps 5, 6 and Blocking step 4 to binary steps 7.
When four DX cooling steps are used with binary function, the cooling effect is divided into fifteen steps.
However, the controller still only has four blocking level settings. Therefore, Blocking step 1 will apply to
Corrigo manual, Rev. D 57 (196)
Information for the specialist - Function descriptions
binary steps 1-4, Blocking step 2 to binary steps 5-8, Blocking step 3 to binary steps 9-12 and Blocking step 4 to binary steps 13-15.
Table 4-27 Settings and configuration for blocking DX cooling at low supply air fan speed
Feature
Block DX cooling
Menu path in Application tool Variable
Ventilation ► Temperature control ► Step Controller 1/2
Block step x if supply air fan output signal < (%)
Note
Blocking of DX cooling on cooling pump alarm
Corrigo can be configured to block DX cooling on cooling pump alarm. The setting is found in Configuration
► Functions ► Step controller 1/2 ► Block output if sequence feedback alarm .
Inputs and outputs, Cooling and Heating / Cooling Change-Over
Table 4-28 Inputs and outputs
Water
DI
AO 1
DO 1
DX
DI
AO 1
DO 1
DX with exchanger control
DI
AO 1
DO 1
DO 1
1. Depending on type of sequence output
Description
Feedback sequence x
Sequence x analog output
✓ Sequence x PWM
✓ Sequence x increase/ decrease
✓ Sequence x start
Sequence x pump
4.3.4
Damper sequence
Mixing dampers
Control
The analog output signal sequence A to J, or the digital output signals Sequence A to J PWM or 3-position; increase and decrease ( Sequence A to J increase/decrease ), control two dampers for gradual mixing of outdoor air and recirculated air. In this mode the output signal decreases with increasing heat demand.
Table 4-29 Settings and configuration for Mixing dampers
Feature
Select damper control
Analog output
Digital output, PWM
Digital output, 3 position actuator
Menu path in Application tool Variable
Configuration ► Functions ►
Any sequence
Type of sequence
Configuration ► Analog outputs
► Selected sequence
Configuration ► Digital outputs
► Selected sequence
Sequence x PWM
Configuration ► Digital outputs
► Selected sequence
✓ Sequence x increase
✓ Sequence x decrease
Description
58 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
CO
2
If demand controlled ventilation is activated in combination with mixing dampers, CO
2
-control is activated for the sequence, and the CO
2
-value rises above the setpoint value, the dampers will let in more outdoor air.
The function is controlled by a PI-controller.
Table 4-30 Settings and configuration for CO
2 and mixing dampers
Feature
Select damper control
CO
2 control activation
Menu path in Application tool Variable
Configuration ► Functions ►
Any sequence
Type of sequence
Configuration ► Functions ►
Function activation
CO2 control
Note
✓ No
✓ Fan start / stop function
✓ Mixing damper function
✓ Fan start / stop + Mixing damper
CO
2 setpoint
PI settings
Ventilation ► Demand control
► CO2
✓ Setpoint mixing damper
(ppm)
✓ Start limit fan start / stop
(ppm)
✓ Stop hysteresis fan start / stop (ppm)
✓ Demand control
✓ Min time for CO2 control
(min)
Ventilation ► PID controllers ►
CO2
Minimum limit
An outdoor air minimum limit for the amount of fresh air can be set in Application tool or in the web interface. The limit value is settable between 0 and 100 %. (Application tool ► Configuration ► Functions ►
Sequence x ► Sequence output min limit (%) and Sequence output max limit (%)
Damper control and exchanger sequence
If both an exchanger sequence and a damper sequence is configured, the exchanger sequence will stop when the damper sequence reaches 100 %.
Inputs and outputs, Damper
Table 4-31 Inputs and outputs Dampers
Dampers
AI 1
DI
AO 2
✓ Humidity room/extract
✓ Humidity outdoor
✓ CO2 room/extract
Feedback sequence x
Sequence x analog output
DO 2
✓ Sequence x PWM
✓ Sequence x increase/decrease
✓ Sequence x start
1. Depending on control mode
2. Depending on type of sequence output
Damper via Modbus
There is support for the following damper via Modbus communication:
Corrigo manual, Rev. D 59 (196)
Information for the specialist - Function descriptions
✓ Belimo
✓ Siemens
4.3.5
Sequence Fan setpoint compensation
The fan setpoint compensation is used to integrate the fans into the temperature control sequence for heating or cooling. The speed of the fans can be increased or decreased depending on the signal of the temperature control loop. ( Application tool ► Configuration ► Functions ► Sequence x ► Type of setpoint compensation ). The output signal of the sequence acts directly on the calculated setpoint of the fans but can also be output additionally via configured outputs. The maximum compensation is adjustable via a parameter ( Ventilation ► Temperature control ► Selected sequence ► Max fan compensation (% )).
Table 4-32 Settings and configuration for fan setpoint compensation
Feature
Select fan setpoint compensation
Type of compensation
Max compensation
Menu path in Application tool Variable
Configuration ► Functions ►
Sequence x
Type of sequence
Configuration ► Functions ►
Selected sequence
Ventilation ► Temperature control ► Selected sequence
Type of setpoint compensation
Max fan compensation (%)
Note
✓ Decrease
✓ Increase
Fan setpoint compensation
DI
AO 1
DO 1
Feedback sequence x
Sequence x analog output
✓ Sequence x PWM
✓ Sequence x increase/decrease
✓ Sequence x start
1. Depending on type of sequence output
4.3.6
Change-over
Change-over is a function for installations with 2-pipe systems. It makes it possible to use the same pipe for both heating and cooling, depending on whether heating or cooling is required.
Change-over functions can be used for control of reversible heat pumps or external change-over coils.
There are two different change-over functions with two different analog output signals Change-over 1 and
Change-over 2 , that is used for change-over control.
Switching between heating and cooling can be done in two ways. Open contact gives heating control and closed contact gives cooling control.
If the input has not been configured, change-over is handled by the internal controller signal. The output signal will follow the two sequence output signals Change-over sequence for heating and Change-over sequence for cooling .
If frost protection sensor has been configured, it will function in the usual way when heating is active.
However, when cooling is active, it will only be used for indicating temperature.
60 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-33 Path to configuration and settings for Change-over
Feature Menu path in Application tool Variable
Select change-over sequence Configuration ► Functions ►
Change-over 1/ 2
Digital inputs Change-over Configuration ► Digital inputs►
Cooling / (Heating) Changeover…
✓ NC (Normally closed)
✓ NO (Normally open)
✓ Manual / Auto
✓ Actual value
Note
4.3.7
Step controller
Step controller heating / cooling
As an alternative or complement to analog control, heating and cooling can be activated in steps. The internal signal is then used to activate digital outputs for control of the heaters/coolers. Two step controllers with up to four step outputs can be configured in Application tool.There are two possible modes; Sequential control and Binary control .
Sequential control
Each output step has individually settable on and off values in percent of the control signal. The number of steps is equal to the number of heater/cooler groups. Minimum on and off times can be set, i.e. the minimum time the step has to be inactive or active for a change to occur. An analog output signal can also be used to fill out between the steps. The signal will go 0…100 % between the activation of each step
Binary control
The heater power outputs should be binary weighted (1:2:4:8 same for heating and cooling). The number of steps to be controlled is set in Configuration ► Functions ► Step controller 1/2 ► Number of steps . After that, the program will automatically calculate the individual activation levels. Switching differential and minimum on/off times can be set in Ventilation ► Temperature control ► Step controller 1/2 ► Min switch time, Step x start point, Step x stop point . The number of heating/cooling steps will be: 2 no. of groups -1. In binary mode, the analog output signal ( Step controller 1 / 2 ) may also be used to fill out between the steps. The signal will go 0…100
% between the activation of each step. The load connected to the analog signal should have the same size as the smallest of the binary groups. In the example below there are 4 heater groups (1:1:2:4) and the total number of heating/cooling steps is eight.
Y1 = 1
1
2
1
1
4
2
1
Figure 4-11 Step controller example: 4 heater groups, 8 steps (1:1:2:4)
Corrigo manual, Rev. D 61 (196)
Information for the specialist - Function descriptions
Table 4-34 Settings and configuration of Step controllers
Feature
Select step control
Digital outputs
Analog output
Actual binary step
Min switch time
Start / Stop point steps
Menu path in Application tool Variable
Configuration ► Functions ►
Step controller 1 or 2
✓ Step controller sequence
(Sequence A to J or changeover 1 or 2))
✓ Step control type (Sequential or binary)
✓ Number of steps (1…4)
✓ Block output if sequence feedback alarm (Yes / No)
Description
Configuration ► Digital outputs
► Step controller 1(2) step 1...4
✓ NC (Normally closed)
✓ NO (Normally open)
Configuration ► Analog outputs
► Step controller 1 (2)
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Ventilation ►Actual / Setpoint
► Step controller 1 or 2
Min switch time (s) Ventilation ►Temperature control►Step controller 1 or 2
Ventilation ► Temperature control ► Step controller 1 or 2
Step X start point (%)
Step X stop point (%)
Block DX-cooling
Block step X if supply air fan output signal <
Ventilation ► Temperature control ► Step controller 1 or 2
Ventilation ► Temperature control ► Step controller 1 or 2
Block step X if outdoor temperature <
Ventilation ► Temperature control ►Step controller 1 or 2
Block DX-cooling if outdoor temperature < (°C)
Block step X if supply air fan output signal < (°C)
Block step ture < (°C)
X if outdoor tempera-
Step controllers and Change-over
By selecting a sequence that is configured as change-over sequence 1 or 2, the digital output signals step 1…4 will be controlled by both the heating sequence and the cooling sequence that is configured in the changeover function.
4.3.8
Support control
Support control is normally used when room temperature control or extract air control has been configured.
Extract air control
When extract air control is configured a room sensor must be installed.
Support control Heating or Support control Cooling will run if support control is configured, the running mode is in Off-state (timer control OFF and not in extended running) and if conditions call for support control (see below). Minimum run time is settable 0 to 720 minutes (FS= 20 minutes) ( Ventilation ► Demand control ► Support control ► Min time for support control ).
Supply air temperature control
Support control can also be configured when supply air temperature control is used, if a room sensor is installed. The controller uses the configured min. (FS=15°C) and max. (FS=30°C) limitation values as support control setpoints ( Ventilation ► Demand control ► Support control ). The values can be changed in
Ventilation ► Actual/Setpoint ► Supply air controller ► Min limit supply air, Max limit supply air.
Start with supply air fan
62 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Support control can also be configured to start only with the supply air fan. In this mode, the extract air fan is not active. This requires a digital output to be configured, which controls the recirculation damper to open completely so the supply air fan can circulate the air to and from the room. The digital output is called
Recirculation air damper ( Configuration ► Digital Outputs ).
Active support control for sequence
It’s also possible to configure the output value when support control is active (same settings as for recirculation) for each sequence. The sequence output can be configured to 0%, 100% or Auto (modulating
0-100%).
Table 4-35 Settings and configuration for Support control
Feature
Select support control
Extract fan running during support control
Minimum time for support control
Setpoints to start/stop heating room
Setpoint heating
Setpoints to start/stop cooling room
Setpoint cooling
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Support control
Support control (Yes/No)
Extract fan running during support control (Yes/No)
Ventilation ► Demand control
► Support control
Ventilation ► Demand control
► Support control
Min time for support control
(min)
✓ Start heating room temperature (°C)
✓ Stop heating room temperature (°C)
Setpoint heating (°C) Ventilation ► Demand control
► Support control
Ventilation ► Demand control
► Support control
Ventilation ► Demand control
► Support control
✓ Start cooling room temperature (°C)
✓ Stop cooling room temperature (°C)
Setpoint cooling (°C)
Description
Support control heating
Demand for support control heating is when the room temperature is lower than the start value which is settable 0 to 30°C ( Ventilation ► Demand control ► Support control ). The fans will run at the preset speed, the heater and the heat exchanger are controlled by the supply air temperature controller with the configured max limitation for the supply air (FS=30°C) as setpoint and the cooling is shut off (0%). Support control heating stops when the room temperature rises to the stop value and the minimum run time has been exceeded or the running mode changes to On .
For each sequence it’s also possible to configure the output value when support control heating is active. The sequence output can be configured to 0%, 100% or Auto (modulating 0-100%) (See section
for more details).
Support control cooling
Demand for support control cooling is when the room temperature is higher than the start value which is settable 20 to 50°C ( Ventilation ► Demand control ► Support control ). The fans will run at the preset speed, the heater and the heat exchanger (cool recovery is active) are shut down (0 %) and the cooling is controlled by the supply air temperature controller with the configured minimum limitation (FS=12°C) as setpoint.
Support control cooling stops when the temperature falls below the stop value and the minimum run time has been exceeded or the running mode changes to On .
For each sequence It’s also possible to configure the output value when support control cooling is active. The sequence output can be configured to 0%, 100% or Auto (modulating 0-100%) (See section
for more details).
Corrigo manual, Rev. D 63 (196)
Information for the specialist - Function descriptions
4.3.9
Free cooling
This function is used during the summer to cool the building night-time using cool outdoor air, thereby reducing the need for cooling during the day and saving energy.
Free cooling requires an outdoor sensor or an intake temperature sensor and either a room sensor or an extract air sensor. If both outdoor sensor and intake sensor is configured it uses the outdoor sensor for the function.
Free cooling is only activated when all the start conditions below are fulfilled:
✓ Less than four days have passed since the unit was last in running mode.
✓ The outdoor temperature during the previous running period exceeded a set limit (22°C).
✓ It is between 00:00 and 07:00 in the day (settable).
✓ The timer outputs for Normal speed , Extended running, Normal and External switch are Off .
✓ A timer channel will be On sometime during the next 24 hours.
✓ The outdoor temperature is a settable difference (FS=2°C) lower than the room/extract temperature
( Ventilation ► Demand control ► Free cooling ► Start when extract-outdoor > (°C) ).
If an intake sensor is used and/or an extract air sensor is selected and ALL the start conditions are fulfilled, free cooling is activated and will run for 3 minutes (settable) to ensure that the temperature measurement when using an extract air sensor reflects the corresponding room temperature, and that the intake temperature sensor senses the outdoor temperature even if it is placed in the fresh air inlet duct. If an outdoor sensor and a room sensor is selected, the unit will not start free cooling as long as all the temperatures are not within the start and stop temperature intervals.
After three minutes (settable), the stop conditions will be controlled.
Stop conditions:
✓ Outdoor temp above the set max. value (18°C) or below the set min. value (condensation risk, 10°C).
✓ The room temp/extract air temp. is below the set stop value (18°C).
✓ Difference between extract/room and outdoor temperature rises above the settable difference (FS=2°
C) - a hysteresis of 0.5 °C.
✓ The timer outputs for Normal speed , Extended running, Normal or External switch are On .
✓ It is past 07:00 in the day.
If any stop condition is fulfilled after three minutes, the unit will stop again. Otherwise, operation will continue until a stop condition is fulfilled.
If the unit is stopped due to outdoor temperature is outside the temperature intervals the unit will start again after 60 min (settable), it will not start again if room/extract air temp has reached below the stop value.
When free cooling is active, the fans run at normal speed or the set value for pressure/flow control. An offset can also be entered for the fan setpoints during free cooling. The digital output Free cooling indication is active. All sequence A to J outputs are shut down. After free cooling has been active, the heating output is blocked at start up for 60 minutes (configurable time).
Table 4-36 Settings and configuration for Free cooling
Feature
Select free cooling
Select sensors
Pretreatment during free cooling
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Temperature control
Free cooling (Yes/No)
Configuration ► Functions ►
Pretreatment
Pretreatment during free cooling (Yes/No)
Note
64 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-36 Settings and configuration for Free cooling (continued)
Feature
Free cooling indication (DO)
Running and stopping depending on outdoor temperature
Stop depending on room temperature
Free cooling start time
Time to block heat output after free cooling
Fan-kick temperature check
Fan-kick interval time
Menu path in Application tool Variable
Configuration ► Digital outputs
► Free cooling indication
✓
✓
NC (Normally closed)
NO (Normally open)
Ventilation ► Demand control
► Free cooling
✓ Running when day outdoor temperature > (°C)
✓ Stop when night outdoor temperature > (°C)
✓ Stop when night outdoor temperature <(°C)
Ventilation ► Demand control
► Free cooling
Ventilation ► Demand control
► Free cooling
Stop when room temperature <
(°C)
Ventilation ► Demand control
► Free cooling
✓ Free cooling start hour (h)
✓ Free cooling stop hour (h)
Time to block heat output after free cooling (min)
Fan-kick temperature check (s) Ventilation ► Demand control
► Free cooling
Ventilation ► Demand control
► Free cooling
Fan-kick interval time (min)
Note
Table 4-37 Inputs and outputs for free cooling
Inputs and outputs
AI
AI
DO
Outdoor temperature sensor or Intake temperature
Room sensor or Extract air sensor
Free cooling operation
4.3.10 Cooling recovery
If the cooling recovery has been configured, there is a cooling requirement and the extract air temperature is a settable amount lower than the outdoor temperature, cooling recovery can be activated. When cooling recovery is activated the heat exchanger and damper sequence output signal will be activated in the cooling demand.
Table 4-38 Settings and configuration for Cooling recovery
Feature
Select cooling recovery
Menu path in Application tool Variable
Configuration ► Functions ►
Temperature control
Cooling recovery mode (On /
Off)
Note
Table 4-39 Inputs and outputs for cooling recovery
Inputs and outputs
AI
AI
Outdoor temperature sensor/Intake temperature sensor
Extract air sensor/Room temperature sensor
4.3.11 Enthalpy control
Calculating the enthalpy means to calculate the energy content of the air, taking into consideration both the temperature and the air humidity. The value is given in energy per kilogram air (kJ/kg). If enthalpy control is configured, enthalpy is calculated both outdoors and for the extract air. Enthalpy control is turned on in the configuration of a sequence ( Configuration ► Functions ► Sequence x ► Enable enthalpy control ). If the enthalpy
Corrigo manual, Rev. D 65 (196)
Information for the specialist - Function descriptions
is higher outdoors than in the extract air, the recirculation damper function (if enthalpy control is configured for the sequence) will be overridden to increase the recirculation. The function is not active when using free cooling, in which case outdoor air is used for cooling the room instead.
If both outdoor sensor and intake sensor are configured it uses the intake sensor. In order for the enthalpy calculation to be made the functions Enable enthalpy control (Configuration ► Functions ► Sequence) and
Cooling recovery mode must be active, and four sensors are required:
Table 4-40 Settings and configuration for Enthalpy control
Feature
Select enthalpy control
Menu path in Application tool Variable
Configuration ► Functions ►
Sequence X
Enable enthalpy control
Select cooling recovery mode Configuration ► Functions ►
Temperature control
Cooling recovery mode (On /
Off)
Note
Table 4-41 Inputs and outputs for enthalpy control
Inputs and outputs
AI
AI
AI
AI
Outdoor temperature sensor / Intake temperature sensor
Outdoor humidity sensor
Room / Extract air temperature sensor
Room humidity sensor
4.3.12 Heat exchanger efficiency monitoring
The function calculates the heat exchanger temperature efficiency in percent when the output signal to the first exchanger sequence is higher than 5 % (settable) and the extract air/efficiency temperature is 2°C
(settable) higher than the outdoor temperature ( Configuration ► Functions ► Temperature control ► Min temperature difference to show efficiency and Min output exchanger to show efficiency ).
When the control signal is lower than 5 % or the outdoor temperature is higher than 10°C the display will show 0 %.
If an intake sensor is configured it will use that for the outdoor temperature.
The heat exchanger efficiency is calculated using the following formula:
Option 1: Efficiency = (Efficiency temp - Outdoor temp ) / (Extract air temp - Outdoor temp ) * 100
Option 2: Efficiency = (Extract air temp - Exhaust air temp) / (Extract air temp - Outdor temp ) * 100
Alarm
An alarm is activated if the efficiency falls below the set alarm level (50 %). The alarm limit (trigger value) can be changed in Alarm status ► 65 Low efficiency exchanger ► Edit ► Alarm trigger value .
heater. It will then replace the exhaust air temperature sensor.
66 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-42 Settings and configuration for Heat exchanger efficiency monitoring
Feature
Actual efficiency value
Analog input
Menu path in Application tool Variable
Ventilation ► Actual / Setpoint
► Exchanger
Configuration ► Analog inputs
► Efficiency temperature exchanger
✓
✓
✓
Sensor type
Min/Max input (V)
Min/Max signal (°C)
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Efficiency presentation (Yes/No) Select efficiency presentation Configuration ► Functions ►
Temperature control
Minimum temperature difference to show efficiency
Configuration ► Functions ►
Temperature control
Min temperature difference to show efficiency (°C)
Note
Table 4-43 Inputs and outputs for heat exchanger efficiency monitoring
Inputs and outputs
AI
AI
AI
AI
Outdoor temperature sensor / Intake temperature sensor
Extract air sensor
Exhaust air sensor
Efficiency temperature sensor
4.3.13 External setpoint
An external setpoint device, e.g. Regin's TBI-PT1000 or TG-R4/PT1000 can be connected. The unit is connected to the analog input signal External setpoint temperature .
Table 4-44
Feature
Select external setpoint device
Menu path in Application tool Variable
Configuration ► Functions ►
Temperature control
External setpoint device
Analog input Configuration ► Analog inputs
► External setpoint temperature
Note
Table 4-45 Inputs and outputs for External setpoint
Inputs and outputs
AI External setpoint temperature
4.3.14 Recirculation
Recirculation is a function for distributing the air in the room using the supply air fan. The function can be used even when there is no heating or cooling demand. When using recirculation control, the extract air fan stops (but can also be set to run) and a recirculation damper opens which allows the air to circulate through the unit.
Recirculation is activated either via a digital input signal or by connecting it to Extra time channel 4
(Application tool ► Time control). If a timer output for Low/Normal/High speed is activated during recirculation via Extra time channel 4 , Low/Normal/High speed gets priority. If a timer output for Low/
Normal/High speed is activated during recirculation activated by a digital input, recirculation gets priority.
Corrigo manual, Rev. D 67 (196)
Information for the specialist - Function descriptions
Either a digital output ( Recirculation damper ) or an analog output sequence A to J can be used as an on/off output signal.
Recirculation control can be configured as either air circulation ( temperature control inactive ) or air circulation with temperature control. (Only heating, only cooling or both heating and cooling). Recirculation control has its own setpoint. However, the other settings are the same as for normal operation, i. e. if normal operation has been configured as room control, room control will also be used during recirculation.
The recirculation setpoint can be configured as constant or offset. Constant means that the recirculation setpoint will be used. Offset is based on an offset from the supply air setpoint.
To lower the temperature, it is possible to configure free cooling to be used during recirculation, if the conditions for free cooling are fulfilled, see
. Then, when the recirculation damper closes, the supply and extract air dampers open and the extract air fan starts. The supply air fan also starts, if it is not already running. If the free cooling function is not configured for recirculation control and you want to cool down the supply air via a low recirculation setpoint, the cooling battery will be used.
A max. room temperature can be configured for recirculation control under Ventilation ► Demand control ►
Recirculation . If the room temperature rises above the set value, recirculation will be stopped. When the room temperature has fallen 1 K below the set max limit, recirculation will start again if the start conditions are still fulfilled.
When running frequency controlled fans and using recirculation control you can, depending on the type of fan control, configure a special pressure/flow offset for the setpoint or a manual output signal for the supply air fan ( Ventilation ► Fan control ► Fans ► Offset ... fan when recirculation) .
It’s also possible to configure the output value when recirculation is active for each sequence. The sequence output can be configured to 0%, 100% or modulating 0-100%.
Table 4-46 Settings and configuration for recirculation
Feature
Select recirculation
Select sequence output when recirculation
Setpoint recirculation temperature
Temperature for change to outdoor air
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Sequence X
Ventilation ► Demand control
► Recirculation
Ventilation ► Demand control
► Recirculation
Recirculation (Yes/No)
Sequence output when recirculation/support (Auto, 0%, 100%)
Setpoint recirculation (°C)
Change to outdoor air when room air > (°C)
Recirculation air damper control Configuration ► Digital outputs
► Recirculation air damper
✓ NC (Normally closed)
✓ NO (Normally open)
Note
4.3.15 Extra temperature sensor
The input signals Extra sensor 1 , Extra sensor 2 , ..., Extra sensor 5 , can be used to add extra temperature sensors for supervision of temperatures that are not related to any control functions. Each sensor has three alarms tied to it: High temperature, Low temperature and Sensor error.
68 (196) Corrigo manual, Rev. D
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Table 4-47 Settings and configuration for extra temperature sensor
Feature Menu path in Application tool Variable
Select extra sensors and inputs Configuration ► Functions ►
Extra sensors & inputs
✓
✓
Alarm acknowledgement
Extra sensors
✓ Extra alarm
Analog inputs Configuration ► Analog inputs
► Extra sensor X
✓ Sensor type
✓ Filter factor
✓ Compensation
✓ Mode
✓ Manual
Title extra sensor X Change name of extra sensor Configuration ► Analog inputs
► Extra sensor
Extra alarm Configuration ► Digital inputs
► Extra alarm X
✓
✓
NC (Normally closed)
NO ( Normally open)
Manual / Auto (On, Off, Auto)
Note
Corrigo manual, Rev. D 69 (196)
Information for the specialist - Function descriptions
4.4 Fan control
4.4.1
General
The variable speed of the fan is controlled via a frequency converter.
Variable speed control uses an analog output per fan or Modbus communication for controlling a frequency converter. There is one setpoint for each fan for normal, low and high speed. Pressure or air flow control can be used, the offset is in the configured unit (pressure/flow/percent).
Variable speed fans can also be configured to be run with fixed output values (0-100%).
Timer outputs
The fans are normally controlled by the timer channels for slow, normal and high speed but can also be started via a digital input or communication.
Slow, normal and high speed
The units will always start directly with the desired speed.
The extract air fan and the supply air fan have individual start and stop delays which are normally set so that the extract air fan is started before the supply air fan. If there are not enough digital outputs for individual control, both fans will have to be started using the signal for the supply air fan, and the delay will be created using an external time relay.
Speed limits
For both supply air and extract air fans the max and min speed limit will be applied to the output. If the user sets the speed value manually or if the ventilation system stops, this will override the set fan speed limits.
Fan control types
There are different types of fan control. The control type is selected in Application tool ► Configuration ►
Functions ► Function activation ► Fan control type. See
below for a description of the different types.
Table 4-48 Fan control types
Pressure
Flow
Control of the fan speed using pressure transmitters.
Instead of giving a pressure setpoint value, it is possible to use an airflow volume value in m 3 /h. The value from the pressure transmitter is recalculated to a volume flow and the fans will be controlled to give a constant flow.
Manual
External
Use the manual setting if you want to manually set the speed of the fan
Use the external setting if you have an external device that controls the fan speed, e.g. 0…10 V device.
Supply air pressure and extract air fan slave The speed of the supply air fan is controlled by a pressure transmitter which is placed in the supply air duct. The extract air fan does not have a pressure transmitter, instead you let the output for the extract air fan follow the control signal for the supply air fan. A scaling factor can be added if the characteristics of the extract air fan are not the same as the characteristics of the supply air fan. (Only pressure control of the supply air fan is possible using this function.)
Supply air pressure with extract air flow slave The speed of the supply air fan is controlled by a pressure transmitter which is placed in the supply air duct. The extract air fan is controlled by the supply air flow, in order to achieve a balanced ventilation. A pressure transmitter which is placed in the supply air fan cone ("SAF flow") gives a measured value of the present supply air flow. A corresponding pressure transmitter is placed in the extract air fan cone and gives a measured value of the extract air flow.
The supply air flow is the setpoint used for control of the extract air fan. A scaling factor can be added if the extract air fan does not have the same characteristics as the supply air fan.
70 (196) Corrigo manual, Rev. D
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Table 4-48 Fan control types (continued)
Extract air pressure with supply air fan slave The speed of the extract air fan is controlled by a pressure transmitter which is placed in the extract air duct. The supply air fan has no pressure transmitter.
Instead, the supply air fan output is made to follow the extract air fan control signal. A scaling factor can be added if the supply air fan characteristics are not the same as the characteristics of the extract air fan (only pressure control of the extract air fan is possible using this function).
Extract air fan pressure with supply air flow slave
The speed of the extract air fan is controlled by a pressure transmitter which is placed in the extract air duct. The supply air fan is controlled by the extract air duct flow in order to achieve a balanced ventilation. A pressure transmitter placed in the extract air fan cone (“EAF flow”) provides a measurement of the current extract air flow. A corresponding pressure transmitter is placed in the supply air fan cone, providing a measurement of the supply air flow.
The supply air fan is controlled using the extract air flow as a setpoint. A scaling factor can be added if the supply air fan does not have the same characteristics as the extract air fan.
Frequency converters
There is support for the following frequency converters and/or EC controllers:
✓ Vacon NXL
✓ Lenze
✓ Omron V1000
✓ Emerson Commander
✓ LS
✓ EBM
✓ Danfoss FC 101
✓ ABB ACS
✓ EC Blue
Read more about the frequency converters in
Appendix F Frequency converters and EC controllers for heat exchangers
Compensation curve
When running pressure/flow control or manual frequency control, it is possible to for the pressure/flow or output to be compensated. By using compensation, the fan can be run at low speed more of the time. The fan speed will increase only when necessary, thus saving energy.
This compensation can be made depending on any analog input such as supply air, extract air, room, outdoor temperature, humidity, CO
2 etc. There are three equal compensation functions.
It is possible to compensate either one or both fans at the same time. It is possible to set which fan that should be compensated, the supply or extract air fan.
There are three compensation functions called Fan compensation curve 1…3 which can be used to set a compensation based on the configured analog input signal (temperature, pressure, flow humidity, CO
2
). The curve has three parameter pairs which correspond to the value of the compensation at three different temperatures.
The compensation can be selected to apply to both fans or one fan, to low, normal, high or all speeds or only when defrosting.
When configuring in Application tool, you select the following settings for the compensation curve:
Corrigo manual, Rev. D 71 (196)
Information for the specialist - Function descriptions
Table 4-49 Settings and configuration for fan compensation curve 1, 2, 3
Feature Menu path inApplication tool Options
Fan level, compensation curve Configuration ► Functions ►
Fan compensation curve 1/2/3
► Fan level
✓ All levels
✓ Low speed
✓ Normal speed
✓ High speed
✓ Low + Normal speed
✓ Normal + High speed
Compensation mode Configuration ► Functions ►
Fan compensation curve 1/2/3
✓ Inactive
✓ In all modes
✓ When defrosting
Fan type to compensate Configuration ► Functions ►
Fan compensation curve 1/2/3
Sensor used in compensation Configuration ► Functions ►
Fan compensation curve 1/2/3
✓ Supply air fan + extract air fan
✓ Supply air fan
✓ Extract air fan
✓ Outdoor temperature
✓ Intake air temperature
✓ Supply air temperature
✓ Exhaust air temperature
✓ Extract air temperature
✓ Room temperature 1…10
✓ etc.
Note
Setpoints for fan compensation
The setpoints for the compensation curves are in the Ventilation section in Application tool.
In
Figure 4-12 Example of fan compensation curve
below is an example of how to compensate the fan depending on the outdoor temperature. The speed of the fan increases at low and high outdoor temperatures. The output of the compensation curve is added to the setpoint of the fan ( Ventilation ► Fan control ► Supply air fan/Extract air fan ► Actual setpoint compensation ).
Outdoor temperature
Figure 4-12 Example of fan compensation curve
Feature
Select fan speed compensated temperature setpoint
Lower/Middle/Higher point X
Lower/Middle/Higher point Y
Menu path in Application tool Variable
Configuration ► Functions ►
Temperature control
Fan speed compensated temperature setpoint
Description
✓ None
✓ Low
✓ High
✓ Low + High
Points on the X-axis Ventilation ► Fan control ►
Fan compensation curve 1/2/3
Ventilation ► Fan control ►
Fan compensation curve 1/2/3
Lower/Middle/Higher point X
Lower/Middle/Higher point Y The Y-axis can be in Pa, % or m 3 /h depending on the fan control type.
72 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Timer outputs
The fans are normally controlled by the timer channels for low, normal and high speed but can also be started via digital input or communication. (Application tool ► Time control)
Fan levels
A frequency controlled fan is the only type of fan that works with the Corrigo. The fan can be set to Low,
Normal or High speed. The selection of the fan speed defines which IOs and time channels will be active in the application.
The fans will always start directly with the desired speed.
There are four different fan speed levels to choose from in Application tool:
✓ Normal
✓ Low - Normal
✓ Normal - High
✓ Low - Normal - High
Variable speed control uses an analogue output per fan or Modbus communication for controlling a frequency converter.
For more information about frequency converters, see
Appendix F Frequency converters and EC controllers for heat exchangers
The fans are normally controlled by the timer channels for slow, normal and high speed but can also be started via digital input or communication.
The extract air fan and the supply air fan have individual start and stop delays which are normally set so that the extract air fan is started before the supply air fan. If there are not enough digital outputs for individual control, both fans will have to be started using the signal for the supply air fan, and the delay will be created using an external time relay.
Application tool menu path for fan control
Feature
Fan control type
Fan levels
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Function activation
Fan control type
Fan levels
Select fan
Select flow presentation
Fan indication
Extract air fan slaved by exchanger supply air flow
Note
✓ Normal
✓ Low-Normal
✓ Normal-High
✓ Low-Normal-High
Configuration ► Functions ►
Fan control
Configuration ► Functions ►
Fan control
Configuration ► Functions ►
Fan control
✓ Supply air + Extract air
✓ Supply air
✓ Extract air
Flow presentation
Supply/ Extract air fan indication
Configuration ► Functions ►
Fan control
Extract air fan slaved by exchanger supply air flow (Yes/
No)
✓ Yes
✓ No
✓ None
✓ Alarm
✓ Run indication
Corrigo manual, Rev. D 73 (196)
Information for the specialist - Function descriptions
Feature
K-factor
X-factor
Setpoint, external flow
Analog inputs flow supply air
Analog inputs flow extract air
Menu path in Application tool Variable
Configuration ► Functions ►
Fan control
✓ Flow calculation supply air Kfactor
✓ Flow calculation extract air
K-factor
✓ Flow calculation exchanger supply air K-factor
✓ Flow calculation exchanger extract air K-factor
Note
Configuration ► Functions ►
Fan control
✓ Flow calculation supply air Xfactor
✓ Flow calculation extract air
X-factor
✓ Flow calculation exchanger supply air X-factor
✓ Flow calculation exchanger extract air X-factor
External flow setpoint (Yes/No) Configuration ► Functions ►
Fan control
Configuration ► Analog inputs
► Flow supply air
✓ Sensor type
✓ Min/Max input (V)
✓ Min/Max signal (m 3 /h)
✓ Filter factor
✓ Compensation (m 3 /h)
✓ Mode
✓ Manual (m 3 /h)
Configuration ► Analog inputs
► Flow extract air
✓ Sensor type
✓ Min/Max input (V)
✓ Min/Max signal (m 3 /h)
✓ Filter factor
✓ Compensation (m 3 /h)
✓ Mode
✓ Manual (m 3 /h)
Analog inputs flow exchanger supply air
Configuration ► Analog inputs
► Flow exchanger supply air
✓ Sensor type
✓ Min/Max input (V)
✓ Min/Max signal (m 3 /h)
✓ Filter factor
✓ Compensation (m 3 /h)
✓ Mode
✓ Manual (m 3 /h)
Feedback Supply/Extract air fan Configuration ► Digital inputs
► Feedback supply/extract air fan
✓ NC (Normally closed)
✓ NO (Normally Open
Mode (On/Off/Auto)
Analog output Supply / Extract fan
Configuration ► Analog outputs
► Supply / Extract air fan
Range output:
✓ 0-10V
✓ 2-10 V
✓ 10-2 V
✓ 10-0 V
Actual values Supply/Extract air fan
Ventilation ► Actual/Setpoint ►
Supply air fan / Extract air fan
✓ Pressure supply / extract air
✓ Flow supply / extract air
✓ Actual setpoint compensation
✓ Actual setpoint
✓ Output signal
✓ Bus values SAF 1…5
Frequency (from frequency converter)
✓ Current (from frequency converter)
✓ Power (from frequency converter)
✓ Error (from frequency converter)
74 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Feature
Setpoints for fans
Menu path in Application tool Variable
Ventilation ► Fan control ►
Fans
✓ Setpoint low/normal/high speed supply air fan (%, Pa, m 3 /h)
✓ Setpoint low/normal/high speed extract air fan (%, Pa, m 3 /h)
✓ Flow supply/extract air (m 3 /h)
✓ Slave factor
✓ Offset supply/extract air when free cooling (%, Pa, m 3 /h)
✓ Offset supply/extract air when recirculation (%, Pa, m 3 /h)
Note
Setpoint supply/extract air fan Ventilation ► Fan control ►
Supply air fan/Extract air fan
✓ Start/stop delay
✓ Outdoor air damper stop delay
✓ Min pressure for supply/ extract air fan indication
✓ Min flow for supply/extract air fan indication
✓ SAF speed min/max limit (%)
✓ EAF speed min/max limit (%)
4.4.2
Fan control types
Pressure
During pressure control, two separate analog output signals are used for supply and extract air and two separate analogue input signals for supply and extract air for pressure transmitters. The fan speeds are controlled via frequency converters, thereby maintaining constant pressure. The pressure transmitter inputs are scalable using Min input (V) and Max input (V).
A digital output signal is normally used for each fan ( Supply air fan start/step 1 and Extract air fan start/step 1 ) for sending a start signal to the frequency converters. The start signal is activated as long as the fan is expected to be running and the control signal is > 0%.
For the supply and extract air fans, there is one individually settable value for normal speed, for low and high speed. Changing between the speed setpoint values is done using the timer channels or using digital input signals ( Extended Operation low/normal/high speed ).
Settings and configuration for Pressure control
Feature
Select pressure control
Fan levels
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Function activation
Fan control type
Fan levels
Note
✓ Normal
✓ Low-Normal
✓ Normal-High
✓ Low-Normal-High
Select fan
Analog inputs pressure supply air
Configuration ► Functions ►
Fan control
Configuration ► Analog inputs
► Pressure supply air
✓ Supply air + Extract air
✓ Supply air
✓ Extract air
✓ Sensor type
✓ Min/Max input (V)
✓ Min/Max signal (Pa)
✓ Filter factor
✓ Compensation (Pa)
✓ Mode
✓ Manual (Pa)
Corrigo manual, Rev. D 75 (196)
Information for the specialist - Function descriptions
Feature
Analog inputs pressure extract air
Menu path in Application tool Variable
Configuration ► Analog inputs
► Pressure extract air
✓
✓
Sensor type
Min/Max input (V)
✓ Min/Max signal (Pa)
✓ Filter factor
✓ Compensation (Pa)
✓ Mode
✓ Manual (Pa)
Feedback Supply/Extract air fan Configuration ► Digital inputs
► Feedback supply/extract air fan
✓ NC (Normally closed)
✓ NO (Normally Open
Mode (On/Off/Auto)
Analog output Supply / Extract fan
Configuration ► Analog outputs
► Supply / Extract air fan
Range output:
✓ 0-10V
✓ 2-10 V
✓ 10-2 V
✓ 10-0 V
Actual values Supply/Extract air fan
Ventilation ► Actual/Setpoint ►
Supply air fan / Extract air fan
✓ Pressure supply / extract air
✓ Flow supply / extract air
✓ Actual setpoint compensation
✓ Output signal
✓ Bus values SAF 1…5
Frequency (from frequency converter)
✓ Current (from frequency converter)
✓ Power (from frequency converter)
✓ Error (from frequency converter)
Setpoints for fans Ventilation ► Fan control ►
Fans
Note
✓ Setpoint low/normal/high speed supply air fan (%, Pa, m 3 /h)
✓ Setpoint low/normal/high speed extract air fan (%, Pa, m 3 /h)
✓ Flow supply/extract air (m 3 /h)
✓ Slave factor
✓ Offset supply/extract air when free cooling (%, Pa, m 3 /h)
✓ Offset supply/extract air when recirculation (%, Pa, m 3 /h)
Setpoint supply/extract air fan Ventilation ► Fan control ►
Supply air fan / Extract air fan
✓ Start/stop delay
✓ Outdoor air damper stop delay
✓ Min pressure for supply/ extract air fan indication
✓ Min flow for supply/extract air fan indication
Flow
Instead of giving a pressure setpoint value, it is possible to use an airflow volume value in m 3 /h. The value from the pressure transmitter is recalculated to a volume flow using the formula below and the fans will be controlled to give a constant flow.
Flow = K * ΔP X
K and X are settable constants depending on the fan size.
Δ P is the differential pressure over the fan in Pa.
Each fan has its own set of parameters.
X is normally 0.5 indicating that the flow is proportional to the square root of the differential pressure.
76 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-50 Settings for K- and X-factor
Feature
K-factor
X-factor
Menu path in Application tool Variable
Configuration ► Functions ►
Fan control
✓ Flow calculation supply air Kfactor
✓ Flow calculation extract air
K-factor
✓ Flow calculation exchanger supply air K-factor
✓ Flow calculation exchanger extract air K-factor
Description
Configuration ► Functions ►
Fan control
✓ Flow calculation supply air Xfactor
✓ Flow calculation extract air
X-factor
✓ Flow calculation exchanger supply air X-factor
✓ Flow calculation exchanger extract air X-factor
Manual
Manual control of the fan is set in Ventilation ► Manual/Auto .
Frequency controlled fans can be controlled at a fixed rotational speed. The rotational speed is selected by setting a fixed output signal (0 – 100%). There is one individual setpoint value for normal speed, for low speed and high speed.
Fans that are run with a fixed output signal can also be compensated (see the section above). In this mode, pressure sensors are not needed.
External
This signal can be used to control the SAF and EAF flow setpoints from an external VAV system if the
”Frequency control external” fan type is used.
If this signal is configured as an analog input signal, the flow setpoint for the SAF and EAF will be controlled in normal speed.
The signal can be configured by using scaling: Min volt input (Vmin)/Min flow and Max volt input (Vmax)/
Max flow. The configuration is done in Configuration ► Analog inputs ► External control supply air fan and
External control extract air fan
Supply air pressure and extract air fan slave
The rotational speed of the supply air fan is controlled by a pressure transmitter which is placed in the supply air duct. The extract air fan does not have a pressure transmitter, instead you let the output for the extract air fan follow the control signal for the supply air fan. A scaling factor can be added if the characteristics of the extract air fan are not the same as the characteristics of the supply air fan.
The extract air fan will start directly at 50% after the start delay. Then the heating of the exchanger will work for this operating mode as well. When the supply air fan starts, the extract air fan will be slave controlled by the supply air flow.
Corrigo manual, Rev. D 77 (196)
Information for the specialist - Function descriptions
Supply air pressure with extract air flow slave
The rotational speed of the supply air fan is controlled by a pressure transmitter which is placed in the supply air duct. The extract air fan is controlled by the supply air flow, in order to achieve a balanced ventilation. A pressure transmitter which is placed in the supply air fan cone ( SAF flow ) gives a measured value of the present supply air flow. A corresponding pressure transmitter is placed in the extract air fan cone and gives a measured value of the extract air flow.
The supply air flow is the setpoint used for control of the extract air fan. A scaling factor can be added if the extract air fan does not have the same characteristics as the supply air fan. The scaling factor is found in
Ventilation ► Fan control ► Slave factor
Extract air pressure with supply air fan slave
The rotational speed of the extract air fan is controlled by a pressure transmitter which is placed in the extract air duct. The supply air fan has no pressure transmitter. Instead, the supply air fan output is made to follow the extract air fan control signal. A scaling factor can be added if the supply air fan characteristics are not the same as the characteristics of the extract air fan (only pressure control of the extract air fan is possible using this function). The scaling factor is found in Ventilation ► Fan control ► Slave factor .
Extract air fan pressure with supply air flow slave
The rotational speed of the extract air fan is controlled by a pressure transmitter which is placed in the extract air duct. The supply air fan is controlled by the extract air duct flow in order to achieve a balanced ventilation. A pressure transmitter placed in the extract air fan cone ( EAF flow ) provides a measurement of the current extract air flow. A corresponding pressure transmitter is placed in the supply air fan cone, providing a measurement of the supply air flow.
The supply air fan is controlled using the extract air flow as a setpoint. A scaling factor can be added if the supply air fan does not have the same characteristics as the extract air fan. The scaling factor is found in
Ventilation ► Fan control ► Slave factor
Step controlled fans
It is possible to control the speed of the fans via digital outputs if the type of fan control is set to Manual or
External ( Configuration ► Functions ► Function activation ► Fan control type ).
Fans with up to 3 speeds can be controlled by this function ( Configuration ► Functions ► Fan control ► Step control of fans) . The function converts the control signal of the fan to start/stop signals for the step outputs.
Switch points and hysteresis are settable parameters ( Configuration ► Functions ► Fan control ► Switch point step 1-2 SAF / 2-3 SAF / 1-2 EAF / 2-3 EAF (%), Hysteresis (% )). The switch between the steps of the fans is delayed by a timer Speed change delay (s) (FS = 10s) ( Ventilation ► Fan control ► Supply air fan/Extract air fan ). When increasing the speed, the fan must run at the lower speed for the set delay time before the next higher speed is activated. If the speed is reduced, the output of the higher stage is switched off and the lower stage is switched on after the delay time has expired. Only the output of the selected speed is active.
Table 4-51 Settings and configuration for step control of fans
Feature
Select Fan control type
Step control of fans
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Fan control type
Configuration ► Functions ►
Fan control
Step control of fans
Note
✓ Manual
✓ External
✓ No
✓ 1 step
✓ 2 steps
✓ 3 steps
Switch points Configuration ► Functions ►
Fan control
Switch point x
78 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-51 Settings and configuration for step control of fans (continued)
Feature
Hysteresis
Digital outputs
Delay time
Delay time
Menu path in Application tool Variable
Configuration ► Functions ►
Fan control
Hysteresis
Configuration ► Digital outputs ✓ Supply air fan start/step1
✓ Supply air fan step 2
✓ Supply air fan step 3
✓ Extract air fan start/step 1
✓ Extract air fan step 2
✓ Extract air fan step 3
Speed change delay Ventilation ► Fan control ►
Supply air fan
Ventilation ► Fan control ►
Extract air fan
Speed change delay
Note
Kitchen function
Kitchen function is an additional function for external controlled fans; Fan control type = External . The function will stop the unit if the external control signal is lower than a settable limit. A potentiometer which is connected to an analog input can start and stop the air handling unit in addition to control the speed of the fans.
The following settings need to be done to get the function activated:
✓ Fan control type = External ( Configuration ► Functions ► Function activation ► Fan control type )
✓ Kitchen function = Yes ( Configuration ► Functions ► Fan control ► Kitchen function )
✓ Analog input: External control supply air fan and External control extract fan ( Configuration ► Analog inputs ) configured to the same physical input
Different speeds of the fans can be achieved by differently adjusted curves for the two analog inputs. ( Configuration ► Analog inputs ► External control xxx fan ► Min/Max input (V), Min/Max signal(%) ).
The unit will stop if the voltage at the input External control supply air fan falls below the Min input (V). It starts again if the signal rises above the Min input (V) + a fix hysteresis of 0,1V.
Table 4-52 Settings and configuration for kitchen function
Feature
Select Fan control type
Kitchen function
Analog inputs
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Fan control
Fan control type
Kitchen function
Configuration ► Analog inputs ✓ External control supply air fan
✓ External control extract air fan
Note
External
✓ No
✓ Yes
4.4.3
Demand controlled ventilation
In applications with varying occupancy the fan speeds or mixing dampers can be controlled by the air quality as measured by a CO
2 sensor.
With the CO
2 function it’s possible to start and stop the fans, compensate the fan speed and in combination with mixing damper let in more outdoor air depending on the CO
2 value.
When the function is activated with start/stop function and the CO
2 value rises above a settable start value
(default: 800 ppm) the fans will start at configured speed (default: normal speed), if they are not already running. Should the CO
2 value continue to rise, the fan speed can increase if compensation with CO
2 value
Corrigo manual, Rev. D 79 (196)
Information for the specialist - Function descriptions
is configured (See function Fan compensation curve 1 in Application tool ). The fans will stop when the CO
2 value falls a settable hysteresis (default: 160 ppm) below the start value.
If demand controlled ventilation is activated in combination with mixing dampers and the CO
2
-value rises above the setpoint value, the dampers controlled by a sequence with CO
2 function will be overtaken by the
CO
2 controller and let in more outdoor air. The function is controlled by a PI-controller.
The function has a settable minimum running time.
Application tool menu paths for Demand control
Table 4-53 Settings and configuration for Demand control
Feature
Select type of CO
2
CO
CO
2
2 control control in sequence control mode
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
CO2 control:
✓ No
✓ Fan start/stop function
✓ Mixing damper function
✓ Fan start/stop + Mixing damper
Configuration ► Functions ►
Sequence X
Configuration ► Functions ►
Sequence X
CO2 control (No/CO2
Sequence 1, 2)
CO2 control mode (Increasing/
Decreasing)
Analog input CO2 room/Extract air
Setpoints CO
PID settings
2 control
Configuration ► Analog inputs
► CO2 room/extract air
✓ Sensor type
✓ Min/Max input (V)
✓ Min/Max signal (ppm)
✓ Filter factor
✓ Compensation (ppm)
✓ Mode
✓ Manual (ppm)
Ventilation ► Demand control
► CO2
✓ Setpoint mixing damper
(ppm)
✓ Start limit fan start/stop
(ppm)
✓ Stop hysteresis fan start/stop
(ppm)
✓ Min time for CO2 control
(min)
Ventilation ► PID controllers ►
CO2
✓ P-band (ppm)
✓ I-time (s)
✓ D-time (s)
Note
Inputs and outputs for Demand control
Inputs and Outputs
AI CO
2 sensors
4.4.4
Extra fan motor control
External control of two external fan motors can be configured. The fans are started via either a digital input, extra time channel 4 or when the unit is started.
A digital output activates the fan motor. A digital input is available for run indication / motor protection.
80 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-54 Settings and configuration for Extra fan motor control
Feature Menu path inApplication tool Variable
Select Extra fan motor control Configuration ► Functions ►
Function activation
Extra fan motor control (No, 1,
2)
Feedback and start/stop of extra fan motor
Configuration ► Functions ►
Extra fan motor control
✓ Type of feedback fan motor
1, 2 (None, Alarm, Run
Indication)
✓ Start/stop function fan motor
1, 2 (Digital input, Unit running, Extra time channel
4)
Note
Digital input Start/Stop extra fan motor
Digital input Feedback extra fan motor 1, 2
Configuration ► Digital inputs
► Start/(Stop) extra fan motor
1, 2
Configuration ► Digital inputs
► Feedback extra fan motor 1,
2
Digital output extra fan motor 1,
2 start
Configuration ► Digital outputs
► Extra fan motor 1, 2 start
✓ NC (Normally closed)
✓ NO (Normally open)
Manual / Auto
✓ NC (Normally closed)
✓ NO (Normally open)
Manual / Auto
✓ NC (Normally closed)
✓ NO (Normally open)
Extra time channel 4 Time control ►Extra time channel 4
Table 4-55 Inputs and outputs extra fan motor control
Motor control 1
DI
DI
DO
Motor control 2
DI
DI
DO
Start/(Stop) extra fan motor
Feedback extra fan motor
Extra fan motor start
4.5 Pump control
Digital inputs and outputs can be configured for pump control.
All the pumps can use run indication with malfunction alarm, or an alarm input connected to a motor protection or similar.
4.5.1
Heating circuit, water heating
The circulation pump for the heating sequence will always run when the outdoor temperature is lower than a settable value (FS +10°C) ( Ventilation ► Temperature control ► Sequence x ► Pump running when temperature
< (°C) ). At higher outdoor temperatures the pump will run when the sequence output signal is larger than 0
V.
If no outdoor temperature sensor has been configured, the stop temperature can be set to 0°C. Then the pump will only run on heat demand.
The pump has a settable stop delay.
The pump will be exercised once daily at a settable time (FS: 15:00 / 3 p.m.) for one minute or the set shortest running time, whichever is the longest.
4.5.2
Exchanger circuit, liquid connected exchangers
The circulation pump for the exchanger sequence will run when the sequence output signal is larger than 0
V.
Corrigo manual, Rev. D 81 (196)
Information for the specialist - Function descriptions
The pump has a settable, shortest running time.
The pump will be exercised once daily at a settable time (FS: 15:00 / 3 p.m.) for 1 minute, or the set stop delay, whichever is the longest.
4.5.3
Cooling circuit
The circulation pump for the cooling sequence will run when the sequence output signal is larger than 0 V.
The pump has a settable, shortest running time.
The pump will be exercised once daily at a settable time (FS: 3 p.m.) for 1 minute, or the set stop delay, whichever is the longest.
4.5.4
Settings and configuration in Application tool for pump control
Table 4-56 Settings and configuration for pump control
Feature
Select pump control
Pump stop mode
Type of pump indication
Digital output
Setpoints pump
Menu path in Application tool Variable
Configuration ► Functions ►
Sequence A to J
Configuration ► Functions ►
Sequence A to J
Pump control (Yes / No)
Pump stop mode (Auto / Always running)
Note
Configuration ► Functions ►
Sequence A to J
Type of pump indication (None /
Alarm / Run indication)
Configuration ► Digital outputs
► Sequence A to J pump
✓ NC (Normally closed)
✓ NO (Normally open)
Ventilation ► Temperature control ► Sequence A to J
✓ Pump stop delay (min)
✓ Pump-kick hour (h)
✓ Pump running when outdoor temperature < (°C)
✓ Hysteresis to allow pump stop (°C)
4.5.5
Inputs and outputs for pump control
Table 4-57 Inputs and outputs for pump control
Heating
AI
DO
DI
Exchanger
-
DO
DI
Cooling
-
DO
DI
Outdoor temperature sensor
Start / Stop circulation pump
Run indication / alarm, circulation pump
4.6 Damper control
4.6.1
Close-off dampers
The outdoor air and exhaust air ducts close-off dampers can be controlled by digital outputs or be hardwired to the supply air fan relays for normal, low and high speed so that the damper is open when the supply air fan is running. When using pressure controlled fans the digital activation signal is activated as soon as the fan has start conditions. This signal can be used to open the close-off damper.
Select damper type in Configuration ► Functions ► Function activation .
82 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
When the unit is stopped it’s possible to configure a delay time before the Outdoor air damper and Exhaust air damper is closing.
✓ Outdoor air damper close delay: 0-300 seconds (Default: 0 s) ( Ventilation ► Fan control ► Supply air fan ► Outdoor air damper stop delay (s) .)
✓ Exhaust air damper close delay: 0-300 seconds (Default: 0 s)( Ventilation ► Fan control ► Extract air fan
► Exhaust air damper stop delay (s) .)
Table 4-58 Settings and configuration of Close-off dampers
Feature
Select damper type
Digital output outdoor air damper
Digital output exhaust air damper
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Damper:
✓ None
✓ Outdoor
✓ Outdoor + Exhaust
✓ Exhaust
Configuration ► Digital outputs
► Outdoor air damper
✓
✓
NC (Normally closed)
NO (Normally open)
Configuration ► Digital outputs
► Exhaust air damper
✓ NC (Normally closed)
✓ NO (Normally open)
Note
4.6.2
Fire/smoke dampers
Fire dampers are normally configured to open on fire alarm but can be configured to be normally open instead.
Fire damper exercising
Fire damper exercising can be configured. The exercise interval is settable. To be able to use this function, all the dampers must have end-position switches.
The digital input Feedback fire damper should be wired to all the fire damper end position switches
( Configuration ► Digital inputs ► Feedback fire damper ).
90° i
...
3
2
1
E
Figure 4-13 Dampers
When the test cycle is initiated, the digital output Fire damper will be activated and the dampers will begin to move. Within the set time (90 s) the signal Feedback fire damper change to indicate that the dampers have left their normal positions. If not, an alarm will be triggered.
Then, within the set time, Feedback fire damper must change again to indicate that all the dampers have reached the other end position. If not, an alarm will be triggered.
Corrigo manual, Rev. D 83 (196)
Information for the specialist - Function descriptions
When all dampers have reached the end position the output Fire damper will be reset to drive the dampers back to normal position. Again, within the set time (90 s) the signal on the digital input Feedback fire damper must change to indicate that the dampers have left the end positions. If not an alarm will be triggered.
Then, within the set time, Feedback fire damper must change again to indicate that all the dampers are back to their normal positions. If not an alarm will be triggered.
The controller can be configured to stop the air handling unit during the damper testing at Configuration ►
Functions ► Fire/Smoke ► Fire damper test , where it's possible to select if the test will be when the unit is running or stopped.
All dampers must be wired to the same output in order to get correct results.
The fire alarm input can be configured as normally closed or normally open ( Configuration ► Digital inputs ►
Fire Alarm ).
Table 4-59 Settings and configuration of fire and/or smoke dampers
Feature
Select fire and/or smoke
Select operation mode when fire/smoke alarm
Supply air fan setpoint type when fire/smoke alarm
Manual setpoint supply air
Manual output supply air
Extract air fan setpoint type when fire/smoke alarm
Manual setpoint extract air
Manual output extract air
Outdoor air damper function when fire/smoke alarm
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Fire/Smoke
Configuration ► Functions ►
Fire/Smoke
Fire / Smoke:
✓ No
✓ Fire
✓ Smoke
✓ Fire + Smoke
Operation mode when fire/ smoke alarm:
✓ Stopped
✓ Continuous run
✓ Running via normal start/ stop conditions
✓ Supply air fan run
✓ Extract air fan run
Supply air fan setpoint type when fire/smoke alarm:
✓ Auto
✓ Manual setpoint
✓ Manual output
✓ Low speed setpoint
✓ Normal speed setpoint
✓ High speed setpoint
Configuration ► Functions ►
Fire/Smoke
Configuration ► Functions ►
Fire/Smoke
Configuration ► Functions ►
Fire/Smoke
Manual setpoint (Pa, m
Manual output (%)
3 /h, %)
Supply air fan setpoint type when fire/smoke alarm:
✓ Auto
✓ Manual setpoint
✓ Manual output
✓ Low speed setpoint
✓ Normal speed setpoint
✓ High speed setpoint
Manual setpoint (Pa, m 3 /h, %) Configuration ► Functions ►
Fire/Smoke
Configuration ► Functions ►
Fire/Smoke
Configuration ► Functions ►
Fire/Smoke
Manual output (%)
Outdoor air damper function when fire/smoke alarm:
✓ Normal function (follow the fan)
✓ Always open
✓ Always closed
Note
84 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Table 4-59 Settings and configuration of fire and/or smoke dampers (continued)
Feature
Exhaust air damper function when fire/smoke alarm
Fire damper mode
Fire damper test
Digital input Feedback fire damper
Menu path in Application tool Variable
Configuration ► Functions ►
Fire/Smoke
Exhaust air damper function when fire/smoke alarm:
✓ Normal function (follow the fan)
✓ Always open
✓ Always closed
Configuration ► Functions ►
Fire/Smoke
Configuration ► Functions ►
Fire/Smoke
Fire damper mode
✓ Not active
✓ Dampers normally closed
✓ Dampers normally opened
Fire damper test
✓ No test
✓ Test when unit running
✓ Test when unit stopped
Configuration ► Digital inputs
► Feedback fire damper
✓
✓
NC (Normally closed)
NO (Normally open)
Digital input Fire/Smoke alarm Configuration ► Digital inputs
► Fire/Smoke alarm
✓
✓
NC (Normally closed)
NO (Normally open)
Digital output fire damper
Sequence output when fire / smoke mode
Setpoints fire damper
Configuration ► Digital outputs
► Fire damper
✓ NC (Normally closed)
✓ NO (Normally open)
Configuration ► Functions ►
Sequence A to J
Ventilation ► Fire/Smoke ►
Fire/Smoke
Sequence output when fire / smoke mode
✓ Run time fire damper (s)
✓ Test interval fire damper (d)
✓ Test hour fire damper (h)
Note
4.6.3
Inputs and outputs for dampers
Inputs and Outputs
DO
DO
DO
DI
DI
DI
Outdoor air damper
Exhaust air damper
Fire damper
Fire alarm
Smoke alarm
Feedback fire alarm
4.7 Pretreatment
Control of dampers and pump for preheated or pre-cooled outdoor air via an underground intake channel.
The digital output Pretreatment is set to preheating when the unit is started and the outdoor temperature is below the set heating start limit (default 8°C) or to precooling when the outdoor temperature is above the set cooling start limit (default 19°C).
If the outdoor temperature exceeds the set heating start limit by more than 1°C, preheating will be stopped, as well as if the outdoor temperature falls below the cooling start limit by 1°C.
If a sensor is configured in the intake duct this temperature will be compared with the outdoor temperature.
If the temperature in the intake duct does not exceed the outdoor temperature by more than 1°C
(adjustable) 5 minutes (adjustable) after start-up when using preheating, preheating will be stopped. The same conditions apply to precooling, i.e. if the intake temperature is not more than 1°C (adjustable) cooler than the outdoor temperature, precooling will be stopped.
Corrigo manual, Rev. D 85 (196)
Information for the specialist - Function descriptions
Pretreatment always starts at start-up of the unit, if the outdoor temperature so permits. If pretreatment is stopped due to a small difference between the intake temperature and the outdoor temperature, pretreatment will be blocked for 6 hours. Then pretreatment will start (if the outdoor temperature so permits) and run for at least 5 minutes (adjustable)
Feature
Select pretreatment
Select if pretreatment activated during free cooling
Intake sensor configuration
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Pretreatment
Pretreatment (Yes/No)
Pretreatment activated during free cooling (Yes / No)
Digital output: Pretreatment start
Configuration ► Analog inputs
► Intake air temperature
Sensor type
Configuration ► Digital outputs
► Pretreatment start
✓ NC (Normally closed
✓ NO (Normally open)
Setpoints pretreatment Ventilation ► Temperature control ► Pretreatment
✓ Activate preheater when outdoor temperature < (°C)
✓ Activate precooler when outdoor temperature > (°C)
✓ Hysteresis (°C)
✓ Min difference between outdoor and intake air temperature (°C)
✓ Pretreatment block time if difference below min (h)
✓ Min run time (min)
Note
4.8 Humidity control
Humidity control can be configured as Humidification, Dehumidification or both Humidification and
Dehumidification.
Two humidity sensors can be connected, a room sensor for control and an optional duct sensor for maximum limiting. The limit sensor can be omitted.
The humidity control is handled by a PI-controller.
The humidity sensors must give 0…10 V DC for 0…100 % RH.
4.8.1
Humidification
An analog output is used to control a humidifier. The output will increase on decreasing humidity. A digital output can also be used to start a humidifier.
Maximum limitation function using duct humidity sensor:
If the maximum limitation is 80 % RH and the hysteresis is 20 % RH, the controller output signal will begin decreasing at 60 % RH. When halfway to 80 % RH (i.e. when at 70 % RH), half the output signal will be damped. If the humidity in the duct still reaches 80 % RH, the entire output signal will be damped.
4.8.2
Dehumidification
An analogue output ( Humidity control ) is used to control a dehumidifier. The output will increase on increasing humidity. A digital output can also be used to start a dehumidifier.
86 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
4.8.3
Humidification / Dehumidification
An analogue output ( Humidity control ) is used to control a humidifier. The output will increase on decreasing humidity.
For dehumidification it’s configurable which sequence that should be activated for dehumidification through condensation. The parameter for configuration is at Configuration ► Functions ► Humidity control ► Select sequence for dehumidify . The output will increase on increasing humidity. This signal overrides the cooling signal from the temperature controller so the output can be activated for dehumidification even if the temperature controller demand is zero.
cooler is placed first in the air stream so that the exchanger and heater can be used to reheat the air after dehumidification.
4.8.4
Digital humidity signal
A digital output signal, Humidity control start , can be used for on/off control of humidifiers/dehumidifiers.
The output signal has an activation value and a deactivation value which are connected to the humidity controller output. The signal is activated when the humidity controller output rises above the set activation value and is deactivated when the humidity controller output drops below the set deactivation value.
Setpoints are found in Ventilation ► Humidity control
If a start signal is needed for a cooling unit or a magnetic valve for DX dehumidification, the digital output signal for the configured sequence Sequence x pump should be used. In this case, the pump stop delay should be set to 0 s ( Ventilation ► Temperature control ► Sequence x ► Pump stop delay ).
4.8.5
Settings and configuration for Humidity control
Feature
Select Humidity control type
Select Sensor
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Temperature control
✓
✓
No
Humidification
✓ Dehumidification
✓ Humidification +
Dehumidification
Room temperature sensor (1…
16) etc.
Note
Select sequence for dehumidify Configuration ► Functions ►
Humidity control
Select type of output Configuration ► Functions ►
Humidity control
Select sequence for dehumidify
Select type of output
✓ Analog
✓ Step
✓ Analog + Step
Analog inputs: Humidity room/ extract air / Supply air / Outdoor
Configuration ► Analog inputs
► Humidity room/extract air /
Supply air / Outdoor
✓ Sensor type
✓ Min / max input (V)
✓ Min / max signal (%RH)
✓ Compensation (%RH)
✓ Mode
✓ Manual (%RH)
Analog output: Humidity control Configuration ► Analog outputs
► Humidity control
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Digital output: Humidity control start
Configuration ► Digital outputs► Humidity control start
✓
✓
NC (Normally closed
NO (Normally open)
Dehumidification /
Humidification
Corrigo manual, Rev. D 87 (196)
Information for the specialist - Function descriptions
Feature
Setpoints Humidity control
PID settings
Menu path in Application tool Variable
Ventilation ► Humidity control
► Humidity control
✓ Setpoint humidity room/ extract (%RH)
✓ Max limit humidity supply air
(%RH)
✓ Neutral zone between humidification and dehumidification
✓ Max deviation room/extract air humidity (%RH)
✓ Digital output start/stop point
(%RH)
✓ Hysteresis for max limit humidity supply air (%RH)
Note
Ventilation ► PID controllers ►
Humidity
✓ P-band (%RH)
✓ I-time (s)
✓ D-time (s)
✓ Max deviation room/extract air humidity (%RH)
✓ Digital output start/stop point
(%RH)
✓ Hysteresis for max limit humidity supply air (% RH)
P-band
4.8.6
Required inputs and outputs for humidity control
Inputs and outputs
AI
AI
AI
AO
DO
Room humidity sensor
Duct humidity sensor
Outdoor humidity sensor
Humidity control output
Humidity control start
4.9 Filter monitoring
Turn on filter monitoring in Configuration ► Functions ► Function activation .
Analog filter guards may be made air flow dependent. This means that a higher pressure drop is permitted across a filter at a higher air flow. For this purpose, X and Y coordinates are used to set the linear function that should be followed at a pressure drop alarm. They can also be accessed through the alarm settings in the display. FS = X1:0 m 3 /h, Y1:10 Pa : X2:2000 m 3 /h, Y2:150 Pa.
If a constant pressure drop alarm level is wanted, Y1 and Y2 should be set to the same value. In cases where flow control is not used, the first pressure value applies to pressure drop alarms (Y1).
4.9.1
Settings and configuration for filter monitoring
Feature
Activate filter monitoring
Type of filter monitoring
Filter placement
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Filter monitoring
Filter monitoring (yes/no)
✓ Sensor
✓ Guard
✓ Sensor + Guard
Configuration ► Functions ►
Filter monitoring
✓ Supply air
✓ Extract air
✓ Supply air + Extract air
Note
88 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Note Feature
Filter alarm reset
Filter alarm time (month)
Filter alarm supply air limit X1/
X2 (m 3 /h)
Filter alarm supply air limit Y1/
Y2 (Pa)
Filter alarm extract air limit X1/
X2 (m 3 /h)
Filter alarm extract air limit Y1/
Y2 (Pa)
Menu path in Application tool Variable
Configuration ► Functions ►
Filter monitoring
Yes/No
1…12 Configuration ► Functions ►
Filter monitoring
Configuration ► Functions ►
Filter monitoring
Configuration ► Functions ►
Filter monitoring
Configuration ► Functions ►
Filter monitoring
Configuration ► Functions ►
Filter monitoring
Factory settings (FS):
✓ X1 = 0
✓ X2 = 2000
Factory settings (FS):
✓ Y1 = 10
✓ Y2 = 150
Factory settings (FS):
✓ X1 = 0
✓ X2 = 2000
Factory settings (FS):
✓ Y1 = 10
✓ Y2 = 150
Required inputs and outputs for filter monitoring
Inputs and outputs
AI
Menu path in Application tool Name
Configuration ► Analog inputs ✓ Pressure filter supply air
✓ Pressure filter extract air
Settings
✓ Device
✓ Terminal
✓ Name
✓ Sensor type
✓ Min input (V)
✓ Max input (V)
✓ Min signal (Pa)
✓ Max signal (Pa)
✓ Filter factor
✓ Mode
✓ Manual (°C)
4.10 Extended operation and External stop
The digital inputs for extended running can be used to force the unit to start in low, normal or high speed although the timer says the operation mode should be Off.
This digital input has always higher priority than running via time schedule.
The unit will run for the set time. If the running time is set to 0 the unit will only run as long as the digital input is closed.
The signal External stop will stop the unit, even if the timer or one of the signals Extended operation low speed ,
Extended operation normal speed or Extended operation high speed says it should stay in running mode.
Table 4-60 Settings and configuration for extended operation and external stop
Feature
Select extended operation
Select external stop
Select extended operation speed
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Extended operation
Extended operation (Yes/No)
External stop (Yes/No)
Extended operation low/normal/ high speed (Yes/No)
Note
Corrigo manual, Rev. D 89 (196)
Information for the specialist - Function descriptions
Table 4-60 Settings and configuration for extended operation and external stop (continued)
Note Feature
Digital inputs: Extended operation low/normal/high speed
Digital input: External stop
Menu path in Application tool Variable
Configuration ► Digital inputs
► Extended operation low/ normal/high speed
Configuration ►Digital inputs
✓
✓
✓
NC (Normally closed)
NO (Normally open)
NC (Normally closed)
✓ NO (Normally open)
Table 4-61 Inputs and outputs Extended operation and external stop
Inputs and Outputs
DI
DI
DI
DI
Extended operation low speed
Extended operation normal speed
Extended operation high speed
External stop
4.11 Time-switch outputs
Up to four digital time-switch outputs can be configured. Each time channel has a separate scheduler with four periods per week-day.
Extra time channel 4 can be used to control the function Recirculation , see
Table 4-62 Settings and configuration for time-switch outputs
Feature
Select extra time channel
Settings Time schedule
Menu path in Application tool Variable
Configuration ► Functions ►
Extra indications & functions
Time control ► Extra time channel 1…4
Extra time channel (0…4)
Note
Table 4-63 Inputs and outputs Time-switch outputs
Inputs and Outputs
DO
Name
Extra time channel 1
DO
DO
DO
Extra time channel 2
Extra time channel 3
Extra time channel 4
Settings
✓ Controller/Expansion unit
✓ Terminal
✓ Name
✓ NC (Normally closed)/NO
(Normally open)
✓ Controller/Expansion unit
✓ Terminal
✓ Name
✓ NC (Normally closed)/NO
(Normally open)
✓ Controller/Expansion unit
✓ Terminal
✓ Name
✓ NC (Normally closed)/NO
(Normally open)
✓ Controller/Expansion unit
✓ Terminal
✓ Name
✓ NC (Normally closed)/NO
(Normally open)
Menu path in Application tool
Configuration ► Digital outputs
Configuration ► Digital outputs
Configuration ► Digital outputs
Configuration ► Digital outputs
90 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
4.12 SFP, Specific Fan Power
When the frequency controlled fans are connected via Modbus and also supply information on motor output, the Corrigo is capable of calculating SFP using the following formula:
SFP = Total effect from all fans / Supply air fan flow (in m 3 /s)
If both SAF and EAF flow transmitters are connected the controller uses the highest value. If only the SAF flow is connected that is used. If no flow sensor is connected it uses the highest calculated flow from the SAF pressure transmitter or EAF pressure transmitter.
Power loss as a percentage of the frequency converter can be added for calculating the total output. If, for instance, power loss is 5 %, the total output will be as follows:
Total output = (Supply air fan output + Extract air fan output) x 1.05
A daily and a monthly average (always 30 days) are also computed and presented. SFP for the average values is calculated only when the unit is running
The SFP values are displayed in Ventilation ► Energy consumption ► SFP
4.13 Extra controller
An independent temperature control circuit for control of for example a separate zone. The circuit can be configured to heating or cooling. It has an analog input signal for temperature sensors and an analog output signal 0…10 V. There is also a digital output signal which is activated when the analog output signal is above
1 V and deactivated when the analog signal is below 0.1 V. The circuit can be configured to be active all the time or to be active only when the unit is running or when defrosting.
An alarm will be triggered if Extra controller is in manual position or if a sensor error occurs.
The extra controller can also be controlled by freeze protection.
Type of freeze protection: Freeze protection temp 1-3.
Table 4-64 Settings and configuration for Extra controller
Feature
Select extra controller
Configuration Extra controller
Menu path in Application tool Variable
Configuration ► Functions ►
Function activation
Configuration ► Functions ►
Extra controller
Extra controller Yes / No
✓ Start/Stop function
✓ Control mode
✓ Type of freeze protection
✓ Pump control
✓ Pump running mode
✓ Type of feedback
✓ Digital start output
✓ Extra contr. output when recirculation/support
✓ Sequence output min/max limit (%)
Analog inputs temperature extra controller
Configuration ► Analog inputs
► Extra controller temperature
✓ Sensor type
✓ Min/max input (V)
✓ Min/Max signal (°C)
✓ Filter factor
✓ Compensation (°C)
✓ Mode
✓ Manual (°C)
Note
Corrigo manual, Rev. D 91 (196)
Information for the specialist - Function descriptions
Table 4-64 Settings and configuration for Extra controller (continued)
Feature
Digital inputs
Analog outputs
Digital outputs Extra controller start / Extra controller pump
Setpoint extra controller
Temperature control
PID settings
Manual / Auto
Menu path in Application tool Variable
Configuration ► Digital inputs
► Feedback extra controller
Configuration ► Analog outputs► Extra controller
✓ NC (Normally closed)
✓ NO (Normally open)
Manual / Auto
Range output:
✓ 0…10 V
✓ 2…10 V
✓ 10…2 V
✓ 10…0 V
Configuration ► Digital outputs
► Extra controller start / Extra controller pump
✓ NC (Normally closed)
✓ NO (Normally open)
Setpoint extra controller (°C) Additional function ► Extra controller ► Actual/Setpoint
Additional function ► Extra controller ► Temperature control
✓
✓
Digital start output start/stop point (%)
Pump stop delay (min)
✓ Pump-kick hour (h)
✓ Pump running when outdoor temperature < (°C)
✓ Hysteresis to allow pump stop (°C)
Note
Additional function ► Extra controller ► PID controller
✓
✓
P-band (°C)
I-time (s)
✓ D-time (s)
Additional function ► Extra controller ► Manual / Auto
✓ Controller mode
✓ Manual set (%)
✓ Controller output (%)
✓ Extra controller start mode
✓ Start
✓ Extra controller pump mode
✓ Start
4.14 Room unit
A room unit, ED-RUx, can be configured in the Functions menu inApplication tool.
Room units are available with or without display, or as a touch display (see instructions and product sheets for ED-RU... and ED-RUD-2).
Different functions are available depending on the selected room unit, such as:
✓ Setpoint adjustment
✓ Show temperature
✓ Extended operation
✓ Select the speed of the fan
92 (196) Corrigo manual, Rev. D
Information for the specialist - Function descriptions
Feature
Temperature to show in ED-
RUx
Function on/off button
Fan speed extended run
Extended operation
Max negative setpoint adjustment
Max positive setpoint adjustment
Menu path in Application tool Variable
Configuration ► Functions ►
Room unit
Temperature to show in ED-
RUx:
✓ Room temperature of the display
✓ Room temperature from sensor connected to controller
✓ Outdoor temperature
✓ Supply air temperature
✓ Extract air temperature
Configuration ► Functions ►
Room unit
Configuration ► Functions ►
Room unit
Function on/off button:
✓ No function
✓ On/Off function
✓ On/Off/Extended operation function
Fan speed extended run:
✓ Low speed extended run
✓ Normal speed extended run
✓ High speed extended run
Configuration ► Functions ►
Room unit
Configuration ► Functions ►
Room unit
Configuration ► Functions ►
Room unit
Note minutes
4.15 Energy consumption
If the fans are controlled with Modbus communication, it is possible to follow up the energy consumption in
Application tool and in the web interface..
In the menu Ventilation ► Energy consumption you find the following information:
✓ SFP (Specific Fan Power)
✓ Power usage fans - the sum of power for all configured fans (SAF or EAF)
✓ Today and last 7 days - total accumulated power usage for today and the last seven days.
✓ This year - total accumulated power usage for the current year and for each month separately.
✓ Last year - total accumulated power usage for the previous year and for each month separately.
Corrigo manual, Rev. D 93 (196)
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Key features
Control heating and ventilation for a comfortable indoor climate
Two analog inputs for sensors or other signals
Two digital inputs for external control
Two relay outputs for controlling fans or dampers
LCD display and user-friendly menu structure for easy setup
Compact size and DIN rail mounting for easy installation
Frequently asked questions
The control functions are easily set up via the LCD display and the user-friendly menu structure.
The controller is compact and DIN rail mounted.
The controller can be installed in electrical cabinets or other confined spaces.
