Regin Corrigo User manual

Corrigo user guide
Ventilation application

Copyright AB Regin, Sweden, 2014

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About this user guide
This user guide covers all the models in the Corrigo series used with the ventilation
application.
The document only covers functions which are available to users with Operator access and
lower.
Revision F, November 2014
Software revision: 3.4
More information
More information about Corrigo can be found in:
•Manual Corrigo Ventilation – Complete manual for configuration and maintenance
of Corrigo with ventilation application, available in Swedish, English, German and
French.
•Manual E tool©– Manual on how to configure the controllers using the PC
software E tool©, available in Swedish, English, German and French.
•Lon-interface variable list – Variable list for the Corrigo series, available in
Swedish and English.
•Corrigo ventilation variables for EXOline, Modbus and BACnet – Variable list for
EXOline, BACnet and Modbus communication, available in English.
•Editable PDF files for Corrigo
•CE - Declaration of conformity, Corrigo
•Environmental declaration – Product content declaration and information about
environmental sustainability in its development and manufacturing process.
The information is available for download from Regin's website, www.regincontrols.com.

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About Corrigo
Corrigo is a series of pre-programmed, configurable controllers for different applications.
The Corrigo series comprises three model sizes: 8, 15 or 28 in-/outputs.
The controllers are available with or without a front panel display and buttons. For units
without a display and buttons, a separate, cable-connected terminal (E3-DSP) with display
and buttons is available.
All normal handling can be carried out using the display and buttons or by using E tool©, a
software tool that runs on a computer connected to the controller with an E-CABLE model
communication cable or a crossover network cable.
Ventilation application, overview of functions
The controller comes loaded with programs for control of a ventilation unit. The temperature
controller is based on a supply air PI-controller for heating control with a pre-programmed
set of control modes. A number of different control functions as well as analogue and digital
input and output functions can be bound to this controller. Certain functions are necessary,
while others can be considered optional. This flexibility means that what is shown in the
display may differ from one unit to another, depending on which functions have been
selected.
Functional choices are not made in the operator level, but in the Admin access level by
educated personnel with specialised knowledge. The same applies to other 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.

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•Extra, separate temperature control circuit for after-heaters, etc.
•Extra control sequences Y4 and Y5 (in addition to Y1, Y2 and Y3) for free
integration into the controller output.
With control of:
•Heat exchanger (liquid connected, plate or rotating) or mixing dampers.
•Heating coil: Water with or without frost protection or electric with high
temperature limit switch.
•Cooling: Water or DX cooling in up to 3 steps.
•Circulation pumps for heating, exchanger and cooling.
•Recirculation dampers.
Fan control
•1- or 2-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
Either humidification or dehumidification, or both humidification and dehumidification, can
be used.
Timer control
For starting and stopping the unit. Up to 5 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 CO2sensor.
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.
Free cooling
When this function has been activated it is used during the summer to cool the building
during the night by using cool outdoor air, thereby reducing cooling needs 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”.

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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 outdoor enthalpy is higher 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
As an alternative to the analogue control of ”Actuator heating Y1” or ”Actuator cooling Y3”
step controllers can be used for controlling heating or cooling in steps using digital 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. It uses the output Y1 Heating/Y3 Cooling.

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Display, buttons and LEDs
This section is applicable to Corrigo units with display and buttons but also to the hand
terminal E3-DSP. For third generation controllers, it is also possible to connect an external
display to units that are equipped with a display and buttons.
Display
The display has 4 rows of 20 characters. It has
background illumination. The illumination is normally
off, but is activated as soon as a button is pressed. The
illumination will be turned off again after a period of
inactivity.
Buttons and LEDs
ARROW UP:
Move up a row in the menu.
(Increase parameter value)
ALARM:
Press to view the alarm list.
ARROW DOWN:
Move down a row in the menu.
(Decrease parameter value)
CLEAR:
Reset/Abort a parameter change unless
OK has already been pressed.
ARROW RIGHT:
Move to a lower menu level.
(Move the cursor to the right in
the parameter)
ALARM LED:
Red, flashing light when there is an
unacknowledged alarm. Non-flashing
light when there is an acknowledged
alarm which has not been reset.
ARROW LEFT:
Move to a higher menu level.
(Move the cursor to the left in
the parameter)

WRITE LED:
Some menus contain settable values.
This is indicated by the yellow LED
flashing. The value can be changed by
pressing OK.
OK:
Open/Activate a selected
menu/setting.
(Confirm a parameter value)
Regulator vent. sys
2014-11-20 13:30
System: Running
Sp: 18.0 Act: 18.2°C
E3-DSP

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The menu system
Navigating the menus
The choice of access level/user access determines which menus are shown.
The display to the left is normally shown at start-up
and is located at the basic level of the menu tree. The
appearance of the start display may vary since there are
5 types to choose from during configuration. The text
in the first row can also be changed using E tool©.
Sp and Av are setpoint and actual value for the supply air controller. This also applies when
using cascaded room temperature or extract air temperature control.
Actual value = The current measured temperature.
Setpoint value = The desired configured temperature.
Pressing ARROW DOWN will move you through the menu choices at this, the lowest level.
ARROW UP will move you back through the choices.
Which menus are shown depends on which access level you are using (see the section
Access rights for more information about logging on to higher levels).
The basic access level, the level normally active when you have not logged on, only shows a
limited number of menus and submenus:
Running mode
Here, you can view and set the unit’s running mode, as well as view selected control
functions and alarm events.
Temperature, Air control and Humidity control
Here, relevant values and setpoint values are displayed. Setpoints can only be changed if you
have Operator access or higher.
Time settings
Here, the time, date and set running times are shown. Values can only be changed if you
have Operator access or higher.
Access rights
Here, you can log on to a higher level, log off to the basic level and change the password.
A user with Normal access, the basic level, can view a
limited selection of menus. The unit’s running mode can
be changed and alarms acknowledged.
If you have Operator access, you can access more
information and change other operation parameters like
setpoints and time functions.
To get to the next menu level, use ARROW UP and ARROW DOWN to place the display
marker opposite the menu you wish to access and press ARROW RIGHT. If you have
sufficient log on privileges the display will change to the menu you have chosen.
At each level there may be several new menus through which you may move using the
ARROW UP and ARROW DOWN buttons.
Regulator vent. sys
2014-11-20 13:30
System: Running
Sp: 18.0 Act: 18.2°C
Running mode
Temperature
Air control
Humidity control
Time settings
Configuration
Access rights

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There are sometimes further submenus linked to a menu or menu item. This is indicated by
an arrow symbol at the right-hand edge of the display. To choose one, use ARROW RIGHT
again.
To go to a previous menu level, press ARROW LEFT.
Change parameters
In some menus there are parameters that can be set. This is indicated by the yellow LED with
flashing.
A quick blinking (2 times/s) indicates that the parameter can be changed using the present
user access.
A slower blinking (1 time/s) indicates that a higher user access is required to change the
parameter.
To change a parameter, first press the OK button. If you need a higher user access than you
have to change the parameter, a log on menu will be displayed, see below. Otherwise, a
cursor will appear at the first settable value. If you wish to change the value, do so by
pressing the ARROW UP and ARROW DOWN buttons.
In numbers containing several digits you can move between the digits using the ARROW
LEFT/RIGHT buttons.
When the desired value is displayed press OK.
If there are further settable values displayed the cursor will automatically move to the next
one.
To pass a value without changing it, press RIGHT.
To abort a change and return to the initial setting, press and hold the C-button until the cursor
disappears.
Collected here are a number of menus showing running mode, selected functions, alarm
events and status of inputs and outputs.
Running mode
Running mode unit
The unit’s running mode can be changed without logging on.
The running mode can be set to Auto, Off, Manual reduced run or Manual normal run.
The Auto mode should normally be used.
Off can be used to stop the unit for service and similar. Manual normal run or Manual
reduced run will start the unit even if the timer says that the running mode should be “Off”.
If the running mode is set to Off, Manual normal run or Manual reduced run, a C alarm
is activated: Running mode Manual. The alarm automatically resets when the running mode
is set to Auto again.
Running mode
Selected functions
Alarm events
Input/Output
Running mode
Auto

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Shows the accumulated running times for the fans.
Selected functions
In these menus, you can see how some of the most
important functions have been configured. Changes
cannot be made.
Heater, exchanger and cooling type.
If one of the functions is not used, it will be shown as
”Not used”.
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.
Support control is used for adjusting the room
temperature outside of the normal running time. If there
is a heating or cooling demand in the room, the unit will
start and the temperature will be adjusted.
The fire function determines the settings for the fire
dampers and the unit’s running mode when a fire alarm
is activated.
Frost protection is normally always used in water
heating systems. The cooling recovery function starts the
heat exchanger in order to return cooling from the
extract air when the extract air is colder than the outdoor
air and cooling is required.
An analogue input can be configured for an external
setpoint device e.g. TG-R4/PT1000.
Running time
SAF: 14.6 h
EAF: 14.4 h
Control function
Supply air control
Fan control
Pressure
Heating: Water
Exchanger: Plate exc
Cooling: Water
Free cool active: No
Support control
active: Yes
CO2/VOC active
If timer on
Fire damper function
Not active
Operation when alarm
Stopped
Frost protection
Active
Cooling recovery
Not active
External setpoint
Not active

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Alarm events
Alarm log, containing the 40 latest alarm events. The
most recent event is listed first. The alarm log can only
be used for viewing the alarm history. Alarms are
handled in a special area, see the section Alarm
handling.
Inputs/Outputs
These menus show the current values for all configured
inputs and outputs.
These are read-only menus. No changes can be made
here.
Universal inputs can be configured as either analogue or digital inputs.
Analogue inputs and digital outputs are shown here as examples.
Analogue inputs/outputs
The current values for the analogue inputs and outputs
are shown here.
Digital inputs/outputs
This menu shows if the digital inputs and outputs are On
or Off.
24 Nov 14:32 B
Malfunction supply
air fan
Acknowledged
AI
DI
UI
AO
DO
AI1: 18.5 Outd temp
AI2: 20.3 Supply temp
AI3: 28.2 Frost prot
AI4: 19.9 Room temp1
DO1:Off SAF 1/1-speed
DO2:Off EAF 1/1-speed
DO3: On SAF 1/2-speed
DO4:Off EAF 1/2-speed

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Temperature
Here you can view all actual and setpoint values for temperature control. The menu is visible
to all users, regardless of log on level. However, to make changes you need at least Operator
authority.
Only menus for activated functions will be shown.
Setpoint Supply air temperature control
Here, actual and setpoint values are shown, as well as
the outdoor temperature if a outdoor sensor has been
configured. This is a read-only menu. No settings can be
made here.
Submenu: Setpoint.
Setpoint Outdoor temperature compensated Supply air control
Here, actual and setpoint values are shown, as well as
the outdoor temperature if a outdoor sensor has been
configured. This is a read-only menu. No settings can be
made here.
Submenus: Setpoint
In control modes Supply air control/Room control and Supply air control/Extract air control ,
the setpoint relationship is used when supply air control is active.
Use the eight breakpoints to generate a setpoint /
outdoor temperature relationship.
In-between-values are calculated using straight
lines between breakpoints.
Setpoints for temperatures lower than the lowest breakpoint and higher than the highest
breakpoint are calculated by extending the line between the two last breakpoints at either
end.
Outd temp:18.4°C
Supply air temp
Act: 19.8°C Setp

Setp: 20.0°C
Supply air temp
Setp: 20.0°C
Outd temp:18.4°C
Supply air temp
Actual: 19.8°C Setp

Setp: 20.0°C
Outdoor comp setp
-20.0°C = 25.0°C
-15.0°C = 24.0°C
-10.0°C = 23.0°C
Outdoor comp setp
-5.0°C = 23.0°C
0.0°C = 22.0°C
5.0°C = 20.0°C
Outdoor comp setp
10.0°C = 19.0°C
20.0°C = 18.0°C

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Example: At the lower end the setpoint is increasing by 1°C for every 5 °C lowering of the
outdoor temperature. So the setpoint at –23°C would be 25°C + 0.6x 1.0°C = 25.6°C.
Setpoint Cascaded room temperature control
In control mode Supply air control/Room control, the
setpoint is used when cascade connected room control is
active.
Submenu for setting the min and max limitation
temperatures for the supply air.
If two room sensors have been configured you
will also get this menu. The controller uses the
average temperature of the two sensors.
Setpoint Cascaded extract air temperature control
In control mode Supply air control/Extract air control,
the setpoint is used when cascaded extract air control is
active.
Sub menu for setting the min and max limitation
temperatures for the supply air.
Setpoint Outdoor compensated room temperature/extract air control
Offers the possibility to compensate the room
temperature/extract air temperature against the outdoor
temperature. Note that the curve must be adjusted for optimal
functionality!
Room temp1
Actual: 22.0°C
Setpoint: 21.5°C

If cascade control
max/min supply setp
Max: 30.0°C
Min: 12.0°C
Room temp2
Actual: 21.8°C
Extract air temp
Actual: 21.0°C
Setpoint: 21.1°C
If cascade control
max/min supply setp
Max: 30.0°C
Min: 12.0°C
Room temp1
Actual: 22.0°C
Setp: 21.5°C


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This function operates according to the
assumption that one may accept a slightly higher
indoor temperature when it is warm outside and
vice versa, providing an excellent opportunity for
conserving energy.
Support control heating/Support control cooling
Support control is normally used when room temperature
control or extract air control has been configured, to
prevent a too large offset in temperature when the unit is
“Off”.
“Support control Heating” or “Support control Cooling”
will run if support control is configured, the running
mode is "Off" (timer control OFF and not in extended
running) and if conditions call for support control.
Minimum run time is settable 0 to 720 minutes (FS= 20 minutes).
Frost protection temperature
Relevant value for the water temperature at the frost
protection sensor. Frost protection can be set to function
either on Y1, Y4 or on both. The function only supports
a single sensor.
Outdoor comp setp
-20.0°C = 25.0°C
-15.0°C = 24.0°C
-10.0°C = 23.0°C
Outdoor comp setp
-5.0°C = 23.0°C
0.0°C = 22.0°C
5.0°C = 20.0°C
Outdoor comp setp
10.0°C = 19.0°C
20.0°C = 18.0°C
If cascade control
max/min supply setp
Max: 30.0°C
Min: 12.0°C
Support heating
Room temp for
Start: 15.0°C
Stop: 21.0°C
Support cooling
Room temp for
Start: 30.0°C
Stop: 28.0°C
Frost protection
Actual: 30.9°C

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Exchanger de-icing
This menu is shown if exchanger de-icing has been
configured. If the temperature at the de-icing sensor
drops below the setpoint value, the de-icing function is
started. It is stopped when the temperature has risen
above the setpoint plus the set differential.
Heat exchanger efficiency monitoring
The function calculates the heat exchanger temperature efficiency in % when the output
signal to the exchanger is higher than 5 % and the outdoor temperature is lower than 10°C.
The function requires an extract air sensor, an exhaust air sensor and an outdoor sensor or an
efficiency sensor, extract air sensor and outdoor sensor.
When the control signal is lower than 5% or the outdoor temperature is higher than 10°C the
display will show 0%.
Recirculation
The first of the three below menus can be found under Configuration in the controller. The
fourth menu is located under Temperature.
Recirculation is a function for mixing 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 and a recirculation damper opens which
allows the air to circulate through the unit.
It is selectable whether or not the extract air fan should
run during recirculation.
Deicing exchanger
Actual: 11.2°C
Setp: -3.0°C
Hysteresis: 1.0°C
Efficiency exch
Actual: 93%
Output exchanger
Actual: 100%
Enable temp
control when
recirculation
Heat and cooling 
Constant or
setpoint offset
when recirculation:
Constant
EAF running during
recirculation: No
Offset SAF when
frequency control
and recirculation:
0.0 Pa

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During recirculation, offset SAF makes it possible to add to the supply air fan an offset to
the setpoint during normal operation.
If pressure control has been configured, the offset is set in Pa. If flow control has been
configured, it is set in m3/h. If manual control has been configured, the offset is set in %.
If you have selected the Offset function, which is a deviation from the regular supply air
setpoint, you will instead be given the option to change this offset value here.
Extra controller unit
An independent temperature control circuit for control of for
example after-heaters. The circuit can be configured to either
heating or cooling.
Enthalpy control
Enthalpy control is a function for overriding the mixing damper
output signal to recirculation if the enthalpy is higher outdoors
than indoors.
Submenu for reading of outdoor temperature and
outdoor air humidity.
Submenu for reading of indoor temperature and air
humidity in the room.
Shows if enthalpy control is active or not.
Extra unit
Actual: 21.2°C
Setpoint: 20.0°C
Enthalpy indoor:
35.5 kJ/kg
Enthalpy outdoor:
36.4 kJ/kg
Outd temp
Act: 19.2 °C
Humidity outdoors
Act: 51.1 % RH
Indoor temp
Act: 19.9°C
Humidity indoors
Act: 44.3 % RH
Override cool
recovery due to
enthalpy:
Active

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Air control
This menu is only shown if frequency controlled fans have been configured.
Depending on the choice of fan control, different combinations of the menus below will be
shown.
Pressure control SAF (there are also corresponding menus for EAF)
Here, Actual and Setpoint values are displayed. This is a
read-only menu. No settings can be made here.
Submenu Setpoint values for normal speed (1/1)
and reduced speed (1/2).
Submenu outdoor compensation. An outdoor
temperature dependent compensation of the
pressure setpoint value can be added. The
compensation can be set for either the supply air
fan alone or for both fans.
Submenu extra compensation. A temperature
dependent compensation similar to the one
above but with selectable temperature source.
Flow control SAF (there are also corresponding menus for EAF)
Setpoint Flow control. Here, Actual and Setpoint values
are displayed. This is a read-only menu. No settings can
be made here.
Submenu Setpoint values for normal speed (1/1)
and reduced speed (1/2).
Submenu Outdoor compensation. An outdoor
temperature dependent compensation of the
pressure setpoint value can be added. The
compensation can be set for either the supply air
fan alone or for both fans.
Pressure control SAF
Actual: 480 Pa
Setp: 490 Pa

Pressure control SAF
Setp 1/1: 490 Pa
Setp 1/2: 300 Pa
Outdoor comp setp
-20 °C = -50 Pa
10 °C = 0 Pa
Act comp: -5 Pa
Comp sens:Room temp1
15 °C = 0 Pa
20 °C = 0 Pa
25 °C = 0 Pa
Flow control SAF
Actual: 1800 m3/h
Setp: 2000 m3/h

Flow control SAF
Setp 1/1: 2000 m3/h
Setp 1/2: 1000 m3/h
Outdoor comp setp
-15 °C =-200.0 m3/h
10 °C = 0.0 m3/h
Act comp: 0.0 m3/h

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Submenu Extra compensation. A
temperature dependent compensation
similar to the one above but with
selectable temperature source.
Manual frequency control SAF (there are also corresponding menus for
EAF)
Here, Actual and Setpoint values are displayed. This is a read-
only menu. No settings can be made here.
Submenu Setpoint values for normal speed (1/1)
and reduced speed (1/2).
The setpoint is set in % of the full output. 100 %
= 10 V output signal.
Submenu outdoor compensation. An outdoor
temperature dependent compensation of the
pressure setpoint value can be added.
The compensation can be set for either the supply air fan alone or for both fans.
Submenu extra compensation. A
temperature dependent compensation
similar to the one above but with
selectable temperature source.
Frequency control external
For fan control using an external control signal, e.g. via a VAV
optimizer.
Comp sens:Room temp1
15 °C = 0 m3/h
20 °C = 0 m3/h
25 °C = 0 m3/h
Frequency control
manual SAF
Output: 75%

Frequency control
manual SAF
Output 1/1: 75%
Output 1/2: 50%
Outdoor comp output
-20 °C = -40 %
10 °C = 0 %
Act comp: 0 % 
Comp sens:Room temp1
15 °C = 0 %
20 °C = 0 %
25 °C = 0 %
Frequency Control
manual SAF
Output: 0 %

Outdoor comp outp
-20 °C = -40 %
10 °C = 0 %
Act comp: 0 % 
Comp sens:Room temp1
15 °C = 0 %
20 °C = 0 %

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Frequency control SAF with EAF slave/flow control (also available for
opposite function)
A pressure control where either the SAF or EAF is operated as
a slave. This function is also available featuring flow control.
25 °C = 0 %
Controller output
comp if cooling
0 at R U S= 0 %
100 at R U S= 0 %
Controller output
comp if heating
0 at R U S= 0 %
100 at R U S= 0 %
Controller output
compensation
Not active
Compensation only
when
1/1-speed : No
defrosting: No
Pressure ctrl SAF
Actual: 480 Pa
Setp.: 490 Pa

Pressure ctrl SAF
Setp 1/1: 500 Pa
Setp 1/2: 250 Pa
Outdoor comp output
-20 °C = 0 Pa
10 °C = 0 Pa

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CO2
In applications with varying occupancy, the fan speed
can be controlled by the air quality as measured by a
CO2sensor. CO2can be set to function either on Y2, Y4
or both.
Act comp: 0 Pa 
Comp sens:Roomtp.1 15
°C = 0 Pa
20 °C = 0 Pa
25 °C = 0 Pa 
Controller output
comp if cooling
0 at R U S= 0 %
100 at R U S= 0 %
Controller output
comp if heating
0 at R U S= 0 %
100 at R U S= 0 %
Controller output
compensation
Not active
Compensation only
when
1/1-speed : No
defrosting: No
CO2
Actual:920ppm
Setp:1000pm