FUNCTION MANUAL FOR AIR HANDLING UNITS
ISYteq Control System
We reserve the right to make changes without prior notice
FläktGroup DC_10576GB 20240111_R1
ISYteq Control system – Function manual
Introduction .................................................................. 4
To navigate the HMI ..................................................................... 4
How to read this document ........................................................ 4
Acronyms ..................................................................................... 4
Log in screen ................................................................. 4
User and access level overview .................................................. 4
To log in ....................................................................................... 4
Control schematics ........................................................ 5
To edit the control schematics ................................................... 5
Dashboard ..................................................................... 6
Basic settings ............................................................................... 6
Supply air volume and Extract air volume ..........................................6
Temperature control ............................................................................6
Controller mode ...................................................................................6
Operating mode ...................................................................................6
Humidity control ..................................................................................6
Outdoor air amount .............................................................................6
Air quality ..............................................................................................6
To change the basic settings .......................................................7
Profile changes ............................................................................ 7
Profile bypass .......................................................................................7
Edit profiles ...........................................................................................7
Smart menu .................................................................. 9
Setup wizard ................................................................................ 9
Airflow adjustment mode ........................................................... 9
Reset/save configuration ............................................................ 9
Loop settings ............................................................................... 9
Documentation generator .......................................................... 9
Edit contact info .......................................................................... 9
Pressure Calibration .................................................................. 10
Time & Date ............................................................................... 10
I/O Assembly .............................................................................. 10
Aggregate configuration ............................................................ 10
CONTENTS
LIMITS OF RESPONSIBILITIES
Although FläktGroup has tested and reviewed the documentation contained in this manual, FläktGroup makes no warranty, neither expressed
nor implied, with respect to this manual, including its quality, performance, or fitness for a particular purpose. FläktGroup shall under no
circumstances be liable for direct, indirect, special, incidental or consequential damage arising from the use or the inability to use information
contained in this manual. FläktGroup reserves the right to revise this publication at any time and to make changes to its content without prior
notice and has no duty to provide notice to previous or current owners with respect to such revisions or changes.
Operating data .............................................................11
1 Unit status .............................................................................. 11
2 Unit main switch ................................................................... 11
3 Operating mode .................................................................... 11
4 Profiles ................................................................................... 11
5 Control ................................................................................... 11
5.1 General ......................................................................................... 11
5.2 Temperature ................................................................................11
5.3 Humidity ......................................................................................14
5.4 Air Quality ....................................................................................14
5.5 Damper ........................................................................................14
5.6 Energy Recovery .......................................................................... 17
5.7 Preheater .....................................................................................18
5.8 Heater ..........................................................................................18
5.9 Cooler ...........................................................................................18
5.10 Fan ..............................................................................................18
5.11 Reheater .....................................................................................20
5.12 Condenser/Evaporator .............................................................. 20
5.14 Recooler .....................................................................................20
5.15 Fire .............................................................................................20
5.16 External Fans ..............................................................................21
5.17 Humidifier .................................................................................. 21
5.18 Adiabatic Cooling ......................................................................22
6 Assemblies ............................................................................. 22
6.1 Pressure Sensors .........................................................................22
6.2 Temperature Sensors ..................................................................23
6.3 Humidity Sensors ........................................................................23
6.4 Air Quality Sensors ......................................................................23
6.5 Damper ........................................................................................23
6.6 Energy Recovery System ............................................................. 23
6.7 Preheater .....................................................................................25
6.8 Heater ..........................................................................................26
6.9 Cooler ...........................................................................................26
6.10 Fans ............................................................................................ 26
6.11 Reheater .....................................................................................26
6.12 Condenser/Evaporator .............................................................. 26
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FläktGroup DC_10576GB 20240111_R1
ISYteq Control system – Function manual
CONTENTS
6.13 Mini Chiller ................................................................................. 27
6.14 ReCooler ....................................................................................27
6.15 Fire .............................................................................................27
6.16 External Fans ..............................................................................27
7 External contacts ................................................................... 28
7.1 Digital Inputs ...............................................................................28
6.17 Unit Light Switch .......................................................................28
6.18 Drain Water ................................................................................28
6.19 Humidifier .................................................................................. 28
6.20 Runaround Coil ..........................................................................28
6.21 Adiabatic Cooler ........................................................................28
7.2 Analog Inputs ...............................................................................29
7.3 Digital Outputs.............................................................................29
7.4 Analog Outputs ............................................................................30
8. Miscellaneous ....................................................................... 31
8.1 Warmup .......................................................................................31
8.2 Frost Case Avoidance ..................................................................31
8.3 Startup .........................................................................................31
8.4 Change over ................................................................................. 32
8.5 Pump ............................................................................................32
8.6 Valve ............................................................................................. 32
8.7 Configuration ...............................................................................33
8.8 BMS ..............................................................................................33
8.9 Electric Heater .............................................................................33
8.10 Operating Data ..........................................................................33
8.12 Energy Consumption .................................................................33
8.13 Specific Fan Power ....................................................................33
8.14 AHU Information ........................................................................33
9. System .................................................................................. 34
9.2 System Status ..............................................................................34
10. Extra functions .................................................................... 34
10.1 Zone 1 / 10.2 Zone 2 ................................................................. 34
10.3 Water Circuits .............................................................................34
Energy monitoring ........................................................35
Energy performance .................................................................. 35
Power consumption .................................................................. 35
Alarms ..........................................................................36
Resetting alarms ........................................................................ 36
Settings ...................................................................................... 36
Event log ......................................................................37
Opening the event log ............................................................... 37
Navigating the event log ........................................................... 37
Trend logs ....................................................................37
Opening trend data ................................................................... 37
Navigating the diagram ............................................................. 37
Time scheduler .............................................................38
Setting up a scheduler .............................................................. 38
To configure an exception schedule ......................................... 38
Settings ........................................................................38
Configuration ............................................................................. 38
Device ..................................................................................................38
Network ..............................................................................................39
Syslog ..................................................................................................41
User 41
Setup Wizard .......................................................................................42
System ....................................................................................... 43
Device Information ............................................................................. 43
Activation code ................................................................................... 43
BACnet ................................................................................................43
TCP/IP ..................................................................................................43
Diagnosis ............................................................................................43
Restart ................................................................................................. 43
Documents ................................................................................ 43
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ISYteq Control system – Function manual
INTRODUCTION
TO NAVIGATE THE HMI
Aer the unit is commissioned through the Setup wizard, the web
or HMI shows the default page aer logging in. The default page has
two parts. The menu bar (1) is always available on the le side of the
screen. The rest of the screen (2) shows either the control schematics
or the dashboard, depending on the selection made in the Setup
wizard.
1
2
Note: The default page can be changed by running the Setup wizard
again. You must log into an account with the needed access level to
do so.
In the above view, select an icon from the menu bar or the default
page to access the respective setting or submenu. Make sure when
using a web browser to allow popup windows.
The basic guest access level has a very limited view. To operate the
unit is necessary to log in to a higher access level.
Note: The number of tiles on the dashboard and the appearance
of the tiles dier depending on the configuration of the unit. Some
configurations might not be available for your unit or your current
access level. In addition, the view can be dierent on a computer,
mobile device or HMI. If the screen or browser window is too small
to show all content, the menu bar and the default page have a scroll
button.
HOW TO READ THIS DOCUMENT
The HMI has many menus and submenus. This document is structured
to help you find the corresponding view for each section easily. Have
the HMI ready when you read this document and consider the below:
• The numbered headings in the Operating data chapter correspond
to the numbered headings in the HMI.
• Each subsection in the Settings chapter starts with the search path
for that section. The corresponding search path is shown at the top
of the screen in the HMI.
• Texts written in italics are texts found in the HMI.
ACRONYMS
These acronyms are sometimes used in the HMI due to limited space:
Acronym Meaning
AHU Air handling unit
BMS Building Management System
EHA Exhaust air
ERS Energy recovery system
ETA Extract air
HR Heating recovery
IDA Indoor air
ODA Outdoor air
RCA Recirculation air
SFP Specific fan power
SP Setpoint
SUP Supply air
LOG IN SCREEN
Before the air handling unit can be configured or controlled, the user
must log in according to the desired access levels.
USER AND ACCESS LEVEL OVERVIEW
Username Password Access rights
Guest – View setpoints and status, read alarms.
No changes can be done,
Operator Operator View and change setpoints and status.
Manage alarms.
Admin Admin • Operator access rights.
• Time synchronization
• Read and write access to ”General”,
“Network”, user and controller
management
The controller has dierent access levels for specific user roles
including changing setpoints or more advanced settings. Additional
user roles can be created. Refer to "User" on page 41 for more
information.
TO LOG IN
The controller is on guest access level by default. To change the user,
select the user icon on the le to open the log in screen.
Fill in username and password from the table depending on the
settings you want to change and select the green checkmark to
log into the respective user. Alternatively, you can select the user
button you are already logged into at the bottom to cancel the log in
procedure.
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ISYteq Control system – Function manual
CONTROL SCHEMATICS
Control schematics shows an overview of your system and its
related control values and functions. Control schematics can be set
as the default page. It can also be opened by selecting the control
schematics icon in the menu bar.
The illustration shows an example to explain the meaning of the
dierent icons.
1
9
10
2 3 3
3
11
6 3
4 5 6
7
8
1. Outdoor component. Indicates an implemented component
placed outdoors, for example a combined outdoor air sensor
measuring relative humidity and temperature.
2. Damper closed. Indicates a closed damper with actual
percentage of the damper position. 0% = fully closed.
3. Combined sensor. Shows an implemented combined sensor with
the measured values, such as relative humidity and temperature.
4. Single sensor. Shows an implemented single value sensor with
the measured value and indicates which type of sensor it is.
5. Energy recovery system. The view changes with the actual
component that is used as energy recovery system. Monitors
the status of motors, pumps or similar of your energy recovery
system.
6. Fan monitoring. Monitors the fan with the corresponding
pressure sensor showing dierential pressure and the calculated
air flow.
7. Heater/Cooler. If the symbol has a plus sign, it is a heater. If the
symbol has a minus sign, it is a cooler. Water coils have a pump
and a valve symbol shown, indicating the flow status. Electrical
heaters do not have these assemblies.
8. Room status. Shows key information about the conditioned room
the unit supplies air to. Contains temperature, air quality and
relative humidity if your unit has the required sensors.
9. Damper opened. Indicates an opened damper with actual
percentage of the damper position. 100% = fully opened.
10. Zoom. Zoom in and out to get a better view of separate sections
in more complex control schematics.
11. Edit. Edit the positions of the component symbols to correspond
to your system.
TO EDIT THE CONTROL SCHEMATICS
1. Select the Edit icon.
2. Select the component that you want to move. The selected
component is marked green and a popup with four icons shows.
3. Select the le or right arrow to move the component. Select the
green checkmark to confirm or select the red cross to cancel.
4. To reset some or all of the components to factory configuration,
select the Reset button that appeared when the Edit icon was
selected.
5. Select the Edit icon again to leave the edit mode.
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ISYteq Control system – Function manual
DASHBOARD
The dashboard is an overview of setpoints and actual values. The
number of tiles and the appearance of the tiles dier depending on
the configuration of the unit. The dashboard can be set as the default
page. It can also be opened by selecting the dashboard icon in the
menu bar.
BASIC SETTINGS
These are the basic settings that a user can control from the
dashboard.
SUPPLY AIR VOLUME AND EXTRACT AIR VOLUME
Setpoint for air volume flow/pressure. Also shows current air volume
flow/pressure and fan output signal. Select to change setpoint
manually.
TEMPERATURE CONTROL
Setpoint for temperature control. Also shows current temperature.
Depending on configuration this view might change. There can for
example be separate setpoints for heating and cooling. Also shows the
control type at which temperature the unit is controlling, for example
extract air.
CONTROLLER MODE
Controller mode. Can be set to only heating/cooling, night purge
or automatic. Automatic will react to profile and summer/winter
changeover settings.
OPERATING MODE
Current active profile. Also shows next switch in time schedule and
corresponding profile. Set to automatic to use time schedule or select
a profile manually.
HUMIDITY CONTROL
Setpoint for humidity control. Also shows current humidity.
Depending on configuration this view might change.
OUTDOOR AIR AMOUNT
Setpoint for outdoor air amount (damper state). Also shows current
value. Depending on configuration this can react to air quality.
AIR QUALITY
Setpoint for air quality. Also shows current air quality. Depending on
configuration this can be active or passive control.
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ISYteq Control system – Function manual
TO CHANGE THE BASIC SETTINGS
Note: The changes that are done at the dashboard are temporary. To
do permanent setpoint changes, select Edit profiles.
1. Select a control tile and one of the following menus shows.
a. Setpoints are changed by using the control wheel, which can
easily be dragged to the desired value. Also, the up and down
arrows allow accurate setting by predefined steps. The amount
of each step depends on the control value that is edited. For
example, air volume flow steps are 100 m³/h, regarding this is
the determined unit for air volume flow.
b. Control types are changed by using an option dialog, from
which the user can choose a preconfigured number of
behaviours.
2. Select the green button in the bottom right corner to confirm the
setting.
PROFILE CHANGES
These are the profile changes that the user can do from the
dashboard.
PROFILE BYPASS
Bypass the current profile for a certain number of minutes. Lets you
select another profile for up to 60 minutes. Aer the set time period,
the unit switches automatically back to the time scheduled profile.
EDIT PROFILES
Change configuration of profiles. The unit needs a switch of profile
before applying changes to current operating profile.
There are five configurable profiles to customize the operation of
the air handling unit. The OFF profile also works as the room frost
protection.
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ISYteq Control system – Function manual
These setpoints can be configured for each configurable profile:
Setpoint Comment Refer to page
Temperature Control Setpoint Setpoint for temperature 11
Temperature Control Heating Setpoint Setpoint for two setpoint configuration 11
Temperature Control Cooling Setpoint Setpoint for two setpoint configuration 11
Temperature Control Cooling Offset Setpoint Cooling setpoint for offset configuration 11
Temperature Control Offset Heating Setpoint Heating setpoint for offset configuration 11
Temperature Control Relative Setpoint Enable Enable relative temperature 11
Temperature Control Relative Setpoint Setpoint for relative temperature 11
Temperature Control Type Temperature reference 9
Temperature Control Mode Auto or manual mode 11
Unit Enable Via Temperature Control Start unit via temperature control 11
Humidity Control Setpoint Setpoint for humidity 14
Humidity Control Dehumidification Setpoint Setpoint for two setpoint configuration 14
Humidity Control Humidification Setpoint Setpoint for two setpoint configuration 14
Humidity Control Offset Humidification Setpoint Humidify setpoint for offset configuration 14
Humidity Control Offset Dehumidification Setpoint Dehumidify setpoint for offset configuration 14
Humidity Control Type Humidity reference 9
Humidity Control Mode Auto or manual mode 14
Unit Enable Via Humidity Control Start unit via humidity control 14
Supply Air Fan Control Volume Flow Setpoint Fan setpoint volume flow configuration 18
Supply Air Fan Control Pressure Setpoint Fan setpoint pressure configuration 18
Supply Air Fan Control Manual Setpoint Fan setpoint manual configuration 18
Supply Air Fan Control Offset Absolute Setpoint 18
Supply Air Fan Control Offset Setpoint 18
Supply Air Fan Control Factor Setpoint 18
Extract Air Fan Control Volume Flow Setpoint Fan setpoint volume flow configuration 18
Extract Air Fan Control Pressure Setpoint Fan setpoint pressure configuration 18
Extract Air Fan Control Manual Setpoint Fan setpoint manual configuration 18
Extract Air Fan Control Offset Absolute Setpoint 18
Extract Air Fan Control Offset Setpoint 18
Extract Air Fan Control Factor Setpoint 18
Air Quality Control Type Air quality reference 14
Air Quality Control Mode Auto or manual mode 14
Air Quality Setpoint (%/ppm) Air quality setpoint 14
Unit Enable Via Air Quality Control Start unit via air quality control 14
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ISYteq Control system – Function manual
Temperature Control Type
Supply Air
This control mode is normally used when the unit does not cover
the internal cooling/heating load but provides outside air to ensure
a good air quality. The basic cooling/heating load is provided from
inernal load or from other heating/cooling systems.
Extract Air/Room Air
The unit controls the temperature in the room while maintaining a
good air quality.
Extract Air Cascade/Room Air Cascade
The unit controls the temperature in the room while maintaining a
good air quality. The supply air temperature can be limited within a
specific range, which increases the comfort in the room. This is the
most commonly used temperature control type.
Supply air limits can be set as follows:
• Absolute setpoint. Fixed setpoints such as 10°C minimum / 45°C
maximum.
• Relative setpoint. Setpoint such as +5°K/-5°K from the extract/
indoor air setpoint.
Outdoor Air Curve
The outdoor air temperature controls the setpoint of the supply
air temperature. The outdoor air sensor is prioritized. Up to 10
breakpoints can be configured.
Humidity Control Type
Supply Air
Requires a supply air humidity sensor. The sensor compares the
current supply air humidity with the setpoint. If there is a deviation,
the humidity of the supply air is adjusted with the available water
coils. Each water coil can be separately configured to support this
process.
Extract Air or Room Air
Requires an extract air or room air humidity sensor. The sensor
compares the current extract air or room air humidity with the
setpoint. If there is a deviation, the humidity of the supply air is
adjusted with the available water coils. Each water coil can be
separately configured to support this process.
A supply air humidity sensor can also be used to monitor and
control the minimum and maximum humidity with the available
humidification/dehumidification option, such as cooling coils.
Extract Air Cascade or Room Air Cascade
Requires an extract air or room air humidity sensor. The sensor
compares the current extract air/room air humidity with the setpoint.
If there is a deviation, the setpoint of the supply air humidity is
increased or decreased depending on the set limits. The limit values
can be set to relative (%) or absolute (g/kg) to the current setpoint.
SMART MENU
The Smart Menu provides easy access to multiple setup and
configuration options.
Note: Depending on your access level, you can have limited access to
this menu. Tiles that you cannot access are greyed out.
SETUP WIZARD
Select to restart the Setup wizard. Refer to "Setup Wizard" on page
42 for more information.
AIRFLOW ADJUSTMENT MODE
This function forces the fan output for service appliances. Select the
start button to initiate the adjustment sequence for a configurable
amount of time. The adjustment process can always be interrupted by
selecting the stop button.
RESET/SAVE CONFIGURATION
Shortcut to the function to reset and save the configuration of the
system. It is only available for service personnel.
LOOP SETTINGS
Select to view the loop values and edit PID constants and setpoint
values. Move through the dierent loops with the page navigation at
the bottom of the popup. Refer to the below table for default values
where P = proportional, I = integral and D = derivative.
Loops P I D
Supply Air Fan Control Volume Flow Loop 0.01 30 0
Extract Air Fan Control Volume Flow Loop 0.01 30 0
Temperature Control Cascade Cooling Loop 0.20 30 0
Temperature Control Cascade Heating
Loop
0.20 30 0
Humidity Control Cascade Humidification
Loop
0.10 30 0
Humidity Control Cascade
Dehumidification Loop
0.10 30 0
DOCUMENTATION GENERATOR
Select to generate an information sheet, a commissioning protocol
and a BACnet file. If you are on the touch display and not a computer,
it is recommended to insert a USB drive/SD card to save these files,
since the storage space on the controller is limited.
EDIT CONTACT INFO
Change the contact information stored on your unit.
Fill in the required information and select Save to store it or Cancel to
not make any changes. Select Reset to set the information to factory
default.
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ISYteq Control system – Function manual
PRESSURE CALIBRATION
Shortcut to zero point calibration of selected pressure sensors.
TIME & DATE
Shortcut to set the current time, date and time zone for the air
handling unit.
I/O ASSEMBLY
Aer configuring new equipment or exchanging old equipment
with dierent components, the inputs and outputs configured in
Assemblies need to be assigned to the correct I/Os on the controller.
1 2 3
4
4
4
5
6 7
• The first column (1) contains all configured inputs and outputs. You
can either keep the order as it is, sorted by time of configuration, or
reassign each element manually.
• The second column (2) assigns the device that the I/O is connected
to. This is usually your main controller (F-MIO FGX) but due to
unit network, extensions modules this dropdown menu can have
multiple options.
• The next column (3) allows to connect the internal I/O signal to the
physical input/output of the controller.
◦ U: analog inputs
◦ Y: analog output
◦ DI: digital input
◦ K: digital output
In addition, the reliability (4) needs to be assigned to the
corresponding analog input.
• By selecting the pencil icon (5) you can choose if the sensor gives a
volt signal or for temperature sensors select the type (NTC, PTC, NI).
• Save your assignment by selecting the green save button (6). Delete
the I/O assignment by selecting the red delete button (7).
AGGREGATE CONFIGURATION
The aggregate configuration allows quick configuration of important
features in form of a tile menu. These configurations are also possible
through the Operating data with much more details. Refer to the
below list of these configurations:
Tile Parameter/Reference
Aux Nightpurge activation, Heating/Cooling
Request, Unit On
Fan Temperature Mode
Settings
Supporting Temperature control Fan Mode
Summer/Winter
Compensation Settings
Temperature Control Summer/Winter
Compensation enable
External Bypass
Settings
Unit Operation Mode External Bypass enable
External Profile
Settings
Unit Operation Mode External Profile enable,
Unit Operation Mode External Profile Selection
Fire Settings Fire Detector Input Configuration, Unit
Operation Mode Selection for Fire Alarm,
Smoke Bypass Damper Configuration
Flowchart
Configuration
Unit Type Selection, Unit Flowchart Outdoor
Air positioning, Unit Flowchart Fan Positioning,
Unit Flowchart RCA Damper Positioning
Sensor Configuration Room Air Sensor Configuration, Outdoor Air
Sensor Configuration
Duct Pressure Sensor
Settings
Duct Pressure Sensor Configuration
Alarm Settings Alarm Collective A/B Configuration
Alarm New Settings new A/B Alarms
External Alarm Settings External Alarm Inputs
Pre-Heater Settings Preheater type configuration
Heater 1 Settings Pump and valve configuration, Frost
protection, changeover type
Heater 2 Settings Pump and valve configuration, Frost
protection, changeover type
Cooler Settings Pump and valve configuration, Frost
protection, changeover type
Re-Heater Settings Pump and valve configuration, Frost
protection, changeover type
External Fans Settings External fan enabling and type selection
Water Circuit Settings Type, pump, valve and extra functional
configuration
Zone 1 Heater Settings Pump and valve configuration, Frost
protection, changeover type
Zone 1 Cooler Settings Pump and valve configuration, Frost
protection, changeover type
Zone 1 Reheater
Settings
Pump and valve configuration, Frost
protection, changeover type
Zone General Summer/winter compensation, humidity
control setting
Zone 2 Heater Settings Pump and valve configuration, Frost
protection, changeover type
Zone 2 Cooler Settings Pump and valve configuration, Frost
protection, changeover type
Zone 2 Reheater
Settings
Pump and valve configuration, Frost
protection, changeover type
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OPERATING DATA
The Operating data menus are extensive. This document describes
the most common functions. The menus dier depending on the
enabled controls and the access level, which means that there can be
functions in the table that are not available for your unit.
Note: The numbered headings in this chapter correspond to the
numbered headings in the HMI.
UNIT STATUS
This menu shows if the unit is on or o, which state it is in and the
total number of operating hours.
UNIT MAIN SWITCH
Select the pencil icon next to Unit Main On Switch Setpoint to switch
the unit on/o. Unit Main On Status shows from which source the unit
is set to on or o, for example External On / Main O.
Note: In some cases, the unit will stay on because of configured
overruns of the fans or fire operation.
OPERATING MODE
Select Unit Operation Mode to select a profile for the unit.
• Automatic: profile is changed based on the Time Scheduler. Refer to
"Time scheduler" on page 38 for more information.
• Manual: profile is set to your desired/pre-configured profile. Refer
to "Edit profiles" on page 7 for more information.
Furthermore, the current running profile is shown in this overview,
giving access to the time scheduler via the blue button next to it. To
start a temporary profile and change to manually or automatic profile
aerwards, activate the bypass option and select a profile to run for
the desired amount of time.
PROFILES
This menu allows to configure your current profile. To save any
changes go back to the dashboard and follow the instructions in
"Profile changes" on page 7.
CONTROL
.GENERAL
This menu shows dierent kinds of status messages for value and
error monitoring. For Service: Here you can configure a maintenance
period, Unit overrun time and intermittent operation.
The value tripping fault monitor is an array of binary values. Under
the object properties you can view a brief description of each value
shown by these. A binary ’1’ means a fault at this specific value.
For example, ...10010 indicates a fault at the second and fih value
described in the properties.
.TEMPERATURE
Before the unit can be temperature controlled enable this function by
selecting the General submenu and selecting the Temperature folder.
5.2.1General
The following options are available:
Setting Options Default
Temperature Control Setpoint
Type
• None
• One Setpoint
• Heating/Offset Cooling
• Cooling/Offset Heating
• Heating/Cooling
None
Temperature Control Enable
Roomfrostprotection
On, Off On
Temperature Control
Roomfrostprotection
Hysteresis Setpoint
0–20 K 2 K
Hysteresis On Summer/Winter
Operation Setpoint
0–10 K 1 K
Hysteresis Off Summer/Winter
Operation Setpoint
0–10 K 0.5 K
Set the control setpoint type to your needs:
• One Setpoint acts as a single setpoint for either of the heating and
cooling operation.
• To compensate internal or external heating or cooling loads, select
the oset options. The oset adds or subtracts a configurable
amount from the setpoint in the respective heating or cooling
mode to compensate internal heating loads such as people or
machines in the summer and external cooling loads such as cold
window surfaces in the winter.
• Heating/Cooling enables two separate setpoints for each mode.
With the hysteresis setpoint you can define a deadband for the
summer and winter operation described further down below.
Based on your configuration, the temperature control menu shows
the necessary setpoints and status indications. Furthermore, the
following options are configurable.
Note: To use the temperature control the profile must be set to the
correct temperature control type. Refer to "Profile changes" on page
7.
Room frost protection
If the room frost protection/O profile is selected and the temperature
control type is Room Air, the unit starts immediately if the
temperature falls below its setpoint. For any other control type the
unit starts intermittently to check the temperature. In case of room
frost condition, it is also possible to heat the room quickly with high
demand by an additional setpoint. If the hysteresis is not 0 (default
2K), a setpoint for heating the room is calculated and applied. If the
unit is switched on and the temperature drops below the room frost
protection setpoint, it stays on unless the Temperature Control Enable
Roomfrostprotection is activated.
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ISYteq Control system – Function manual
Summer and winter operations
Based on outdoor air and indoor/extract air temperature, configure
a deadband to define a range between the two temperatures
which deactivates both operation modes. The summer and winter
operations are used to lock the energy recovery system and damper
temperature sequences. Summer operation means, that it is possible
to heat by either increasing the outdoor air amount or by decreasing
the energy recovery setpoint. Winter operation means that it is
possible to heat by either decreasing the outdoor air amount or by
increasing the energy recovery setpoint.
On
Release Summer Operation
ETA/IDA-Tmp
ODA-Tm
p
HysO
HysOn
O
On
Release Winter Operation
ETA/IDA-Tmp
ODA-Tm
p
HysO
HysOn
O
Acronym Description
HysOff Hysteresis Off
HysOn Hysteresis On
ETA/IDA-Tmp Extract air/indoor air temperature
ODA-Tmp Outdoor air temperature
5.2.2Start
Configure a deadband before the unit switches from heating to
cooling action and vice versa.
Setpoint Options Default
Temperature Control Start Deadband Setpoint 0–50K 0.5K
5.2.3Supply Air Min/Max/Cascade
Selecting either relative or absolute for the control type allows to
keep the supply air within certain limits. Configure the temperature
control base setpoint active to On for the cascade control function
to use the base setpoint which can be changed here or on the
dashboard.
Setpoint Options Default
Temperature Control Supply Air Minimum
Relative Setpoint
-10–0.5K -5
Temperature Control Supply Air Maximum
Relative Setpoint
0.5–10K 5
Temperature Control Supply Air Min/Max/
Cascade Type
• None
• Absolute
• Relative
None
Temperature Control Base Setpoint Active • Off
• On
Off
Temperature Control Base Setpoint 5–45°C 21
Temperature Control Supply Air Minimum
Absolute Setpoint
10–45°C 15
Temperature Control Supply Air Maximum
Absolute Setpoint
10–45°C 45
5.2.4Summer/Winter Compensation
To compensate cold or hot outdoor air temperatures, activate the
summer/winter compensation and set the start and stop values for it.
The unit will compensate within the configured limits the temperature
setpoint by an oset.
Setpoint Options Default
Temperature Control Winter Compensation
Offset Setpoint
-10–10K 0
Temperature Control Winter Compensation
Start Setpoint
-30–20°C 0
Temperature Control Winter Compensation
End Setpoint
-30–20°C 20
Temperature Control Summer Compensation
Offset Setpoint
-10–10K 0
Temperature Control Summer Compensation
Start Setpoint
10–45°C 26
Temperature Control Summer Compensation
End Setpoint
10–45°C 30
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5.2.5Outdoor air curve
If the temperature control type is Outdoor air curve, the setpoint
floats based on the outdoor air. Therefore, configure 10 Breakpoints
for the behaviour.
Outdoor air curve
30
-10 -5 0510 15 20 25 30 35
Supply air setpoint [°C]
Outdoor air temperature [°C]
25
20
15
10
5
0
5.2.6Night purge
Configure a passive cooling mode that is mainly used at night. In this
operating mode, the attempt is made to reach the current setpoint
value exclusively with the passive cooling stages. Aer reaching the
setpoint, the unit switches o automatically. The unit switches o
again if the condition above is no longer met but can also be limited
by a minimum outdoor or indoor temperature.
If the passive cooling is not suicient to keep the desired temperature,
the active cooling (if available) is enabled. The recommended
temperature control type for night purge is an indoor temperature
control. However, it is also possible to parameterize all other control
types. With cascade controls, the unit may not be stabilized because
of the continuously shiing setpoint.
The following description refers only to an indoor air temperature
sensor. In case of an extract air temperature sensor, the unit runs in
an intermittent operation to measure temperature. If the outdoor
air temperature is higher than the indoor air temperature, the unit
remains deactivated.
When the following conditions are reached, the unit switches on and
cools with the available passive stages:
• Outdoor air temperature < (Indoor air temperature -1K)
• Outdoor air temperature > Xs Outdoor air-Min (Night purge locked)
• Indoor air temperature > (Xs control setpoint + 1K), depending on
the types of rule set
The unit switches o again if one of the above conditions is no longer
met. That means:
• Outdoor air temperature > (Indoor air temperature -1K)
• Outdoor air temperature < (Xs Outdoor air-Min Night Purge +1K
(Hysteresis Enable via Outdoor air-Min))
• Indoor air temperature < (Xs control setpoint + 0.5K), depending on
the types of rule set
If the passive cooling is not suicient to keep the indoor air
temperature within a desired range, the active cooling (if available) is
released aer the base temperature cooling has exceeded the oset
range to prevent the indoor air temperature from rising further.
The base temperature is specified as the dierence to the current
control setpoint.
• Base temperature cooling (dierence to control setpoint in K)
The recommended temperature control type for night purge is
an indoor air temperature control. However, it is also possible to
parameterize all other control types. Only supply air control via
outdoor air characteristic and no control at all are not allowed.
With cascade controls, the unit may not be stabilized because the
setpoint shis continuously. When there is no indoor air temperature
sensor is available, an interval circuit for the extract air temperature
sensor is started. The conditions remain the same and replaced by the
extract air temperature.
Setpoint Options Default
Temperature Control Nightpurge Mode • Always
• Summer
only
Always
Temperature Control Nightpurge Offset
Room Air Cooling Setpoint
-10–0.5K -1
Temperature Control Nightpurge Offset
Cooling Setpoint
0.5–10K 1
Temperature Control Nightpurge Offset
Active Cooling Setpoint
0–20K 5
Temperature Control Nightpurge Offset
Room Air Heating Setpoint
0.5–10K 1
Temperature Control Nightpurge Offset
Heating Setpoint
-10–0.5K -1
Temperature Control Nightpurge Offset
Active Heating Setpoint
-20–0K -5
5.2.7Change Over
It is possible to change the temperature control type via summer/
wintertime dedication. Note that you will no longer be able to
change the control type in your profiles if this function is enabled. To
configure the summer/winter changeover, go to "8.4 Change over" on
page 32 and follow the instructions there.
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.HUMIDITY
Before the unit can be humidity controlled, enable this function in the
General submenu.
5.3.1General
The following options are available:
Setting Options Default
Humidity Control Setpoint Type • None
• One Setpoint
• Humidification/Offset
Dehumidification
• Offset Humidification/
Dehumidification
• Humidification/
Dehumidification
None
Set the control setpoint type to your needs.
• One Setpoint acts as a single setpoint for either of the
humidification and dehumidification operation.
• To compensate additional humid loads, select the oset options.
The oset adds or subtracts a configurable amount from the
setpoint in the respective mode to compensate internal loads, such
as people or dry manufacturing processes.
• Humidification / Dehumidification enables two separate setpoints
for each mode.
Note: To use the humidity control you have to edit your profile to
the correct humidity control type. Refer to "Profile changes" on page
7.
5.3.2Start
Configure a deadband before the unit switches from humidifying to
dehumidifying action and vice versa.
Setpoint Options Default
Humidity Control Start Deadband Setpoint 0–50% 2%
5.3.3Supply Air Min/Max/Cascade
Selecting either relative or absolute for the control type allows to
keep the supply air within certain limits.
Setpoint Options Default
Humidity Control Supply Air Minimum
Relative Setpoint
0–100% 0
Humidity Control Supply Air Maximum
Relative Setpoint
0–100% 80%
Humidity Control Supply Air Min/Max/
Cascade Type
• None
• Absolute
• Relative
None
Humidity Control Supply Air Minimum
Absolute Setpoint
0–15g/kg 0g/kg
Humidity Control Supply Air Maximum
Absolute Setpoint
0–15g/kg 15g/kg
.AIR QUALITY
To enable air quality control you need to configure an air quality
sensor in the Setup wizard.
Air quality is used to maintain the air quality in the room. It is divided
in passive and active air quality control. Passive control increases/
decreases the amount of outdoor air and active control increases/
decreases the air flow to the room. For passive control a recirculation
air damper is necessary.
Note: To use the air quality control you have to edit your profile with
an air quality control type. Refer to "Profile changes" on page 7.
The controller can support either a VOC sensor or a CO2 sensor, which
can be placed either directly in the room or in the extract air duct. If
the CO2 or VOC value is too high, the controller increases the outdoor
air amount and the air flow. Configure the deadband before this
happens.
Setpoint Options Default
Outdoor Air Quality Control Type • None
• ODA CO2
• ODA CO
None
Air Quality Control Start Deadband
Setpoint
0–500 ppm 50 ppm
.DAMPER
To configure the outdoor/exhaust air damper behaviour the following
functions are available. First set up the damper control type and
proceed with any other configuration you want to change. Configure
the outdoor damper behaviour to support temperature, humidity and
air quality control.
Damper Control Type
• Outdoor Air/Exhaust Air (Default)
The dampers are opened or closed depending on the operating status
of the system. When the system starts, the fans start at minimum
speed and the outdoor/exhaust air dampers open. If the dampers
opened, the normal control of the fans is enabled. Aer the fans have
been switched o, the dampers are closed aer a set delay time has
elapsed.
• Outdoor Air Amount % Fix
In this operating mode it is assumed that a recirculation air damper
is available for the system in addition to the outdoor/exhaust air
damper. Aer switching on the system, the outdoor/exhaust air
damper is moved to a fixed damper position. The recirculation air
damper runs in the opposite direction to the outdoor/exhaust air
damper. Depending on the action mode, the controller starts either
with minimum or maximum value and increases or decreases the
value in the opposite direction according to the additional control
loops.
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• Outdoor Air Amount % Calculated
In this operating mode, a minimum fresh air flow rate in % can be
specified. The system calculates the volume flow based on the
fan setpoint and readjusts the damper position accordingly. To
normalize the volume flow, the fan setpoint must be determined at
nominal volume flow and entered in the configuration. Depending
on the action mode the controller starts with minimum or maximum
value and increases or decreases the value in the opposite direction
according to the additional control loops.
• Outdoor Air Amount Volumeflow Calculated
This option is the most comfortable one to control the outside air
amount. The fresh air flow rate can be specified. The exact outside
air volume flow is calculated via a pressure drop sensor through the
energy recovery system. If the extract air fan is assembled as exhaust
air fan, the volume flow for the exhaust air fan will be adapted. For
this function an outdoor air bypass pressure sensor (A) is mandatory.
A
Acronym in figure Description
EHA Exhaust air
ODA Outdoor air
ERS Energy recovery system
RCA Recovery air
MIA Mixed air
ETA Extract air
SUP Supply air
Setting Options Default
Damper Control Outdoor Air Amount Volume
Minimum Setpoint
Depending
on your
unit
500
Damper Control Outdoor Air Amount Volume
Maximum Setpoint
Depending
on your
unit
2000
Damper Control Outdoor Air Amount Volume
Setpoint Control Value
Read only –
Damper Control Outdoor Air Amount Volume
Control Value
Read only –
Damper Control Outdoor Air Amount Loop Read only –
5.5.3Temperature
If the temperature control is enabled, the damper loops for heating
and cooling are available with the following settings:
Setting Options Default
Damper Control Heating Loop PID
configuration
–
Damper Control Cooling Loop PID
configuration
–
Damper Control Start Value Heating
Setpoint
0-100% 100%
Damper Control Start Delay Heating
Setpoint
0-600 s 0 s
Damper Control Stop Delay Heating
Setpoint
0-600 s 0 s
Damper Control Start Value Cooling
Setpoint
0-100% 0%
Damper Control Start Delay Cooling
Setpoint
0-600 s 0 s
Damper Control Stop Delay Cooling
Setpoint
0-600 s 0 s
Damper Control AutoKp Enable On/Off Off
Damper Control Heating Enable On/Off On
Damper Control Cooling Enable On/Off On
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5.5.4Humidity
If the humidity control is enabled, the damper loops for humidification
and dehumidification are available with the following settings:
Setting Options Default
Damper Control Humidification Loop PID
configuration
–
Damper Control Dehumidification Loop PID
configuration
–
Damper Control Start Value
Dehumidification Setpoint
0-100% 0%
Damper Control Start Delay
Dehumidification Setpoint
0-600s 0s
Damper Control Stop Delay
Dehumidification Setpoint
0-600s 0s
Damper Control Start Value
Humidification Setpoint
0-100% 0%
Damper Control Start Delay
Humidification Setpoint
0-600s 0s
Damper Control Stop Delay
Humidification Setpoint
0-600s 0s
5.5.5Air quality
If the air quality control is enabled, the damper loop for air quality is
available with the following settings:
Setting Options Default
Damper Control Air Quality Loop PID
configuration
500
Damper Control Start Value Air Quality
Setpoint
0-100% 0%
Damper Control Start Delay Air Quality
Setpoint
0-600 s 0 s
Damper Control Stop Delay Air Quality
Setpoint
0-600 s 0 s
Outdoor Air Amount Volumeflow Calculated = Active Mixing
The unit comes with an active mixing function which contains the
following two parts which can be activated in the Damper menu.
Enabling both will perform the active mixing function:
Damper Control Mode Selection: Pressure Balancing/Pressure
Adaption
Pressure adaption is used to ensure an overpressure between extract
air and supply air flow before the mixed air damper is opened for
cooling or heating purposes. If opening the mixed air damper is
required, the outside air damper is used to maintain a positive
pressure drop from extract to supply air section.
The following components are required:
• modulated outside air damper
• recirculation air damper
• recirculation air pressure sensor
Pressure balancing is used to compensate or reduce the risk of
internal leakage (not part of active mixing) in the air handling unit if a
rotary heat exchanger is used. This function is automatically disabled
if opening the mixed air damper is required.
The following components are required:
• modulated extract air damper
• recirculation air pressure sensor
These are the main parameters:
Setpoint Options Default
Damper Control Mode Setpoint • None
• Balancing
• Adaption
• Both
None
Damper Control Outdoor Air Amount
Pressure Adaption Setpoint
0–100 Pa 0 Pa
Damper Control Outdoor Air Amount
Pressure Balancing Setpoint
-100–100 Pa 0 Pa
Damper Control Outdoor Air Amount
Pressure Adaption Delay Setpoint
0–100 s 0 s
Damper Control Outdoor Air Amount Volume calculated
Refer to the above.
5.5.6Calibration
Before the active mixing function can be enabled, it is necessary to do
a calibration. If the unit is configured for active mixing, the unit shows
a low level alarm on the screen until the calibration is executed.
The calibration is only required to do once, and should preferably
be performed when the unit is running at intended air volume flow.
Select Calibration > Set Damper Control Outdoor Air Amount Start
Calibration Enable > On and wait for the unit to finish.
The active mixing function normally activates when the heat recovery
wheel is at 100%, and more energy is needed. First a pressure
adaption is performed, to ensure a slight negative pressure on the
supply side versus the extract side of the recirculation air damper.
This ensures a smooth transition into mixing and that the airflow has
the correct direction. Then the outdoor air damper closes gradually
while the recirculation air damper opens until the needed amount
of mixing air is achieved. The mixing amount can be maximized by a
customer selected fresh air amount or by an air quality sensor in the
extract air/room air.
• Damper Control Outdoor Air Amount Volume Minimum Setpoint. The
minimum amount of outdoor air.
• Air Quality Control Type. Placement of the air quality sensor, if
configured for your unit.
• Air Quality Control Mode. The passive option Passive restricts
mixing. The option Active increases the airflow.
• Air Quality Setpoint. Maximum allowed CO2 ppm.
• Select Control > Damper > Damper Control Outdoor Air Amount
Volume Control Value to read the actual fresh air volume.
• Select Control > Damper > Temperature and Control > Damper >
Air Quality to read the values for these controllers for the fresh air
amount.
• Select the icon for Control schematics in the menu bar to read the
output signals to the dampers, where the outdoor and return air
damper indicates the mixing.
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.ENERGY RECOVERY
You can select an Energy Recovery System Anti Icing Type from the
following:
• None
• Anti Icing
• Pressure
• Standard Frost Protection. Open the bypass damper and close
the face damper. When the bypass damper reaches its default
threshold output (80%) or the outdoor temperature falls below its
threshold value, defrosting is activated. During the defrosting, the
maximum output for both supply air and extract air fans is 50%.
Defrosting is perfomed by completely opening the bypass damper
for a set duration.
• Advance Frost Protection. Standard Frost Protection + face dampers
will go in to defrosting cycle in segmentation. When one face
damper is defrosting, other face dampers are set to the threshold
setpoint.
• Advance Frost Protection Plus. Advance Frost Protection + controlling
four face dampers instead of two.
Note: Anti Icing and Pressure use the preheater to raise cold corner
temperature/lower pressure loss due to icing at the heat exchanger.
Standard Frost Protection will also use the preheater but include your
energy recovery system and face dampers (if any applicable). Advance
Frost Protection for rotary heat exchangers will reduce turning speed
to prevent the exhaust air from dropping to freezing point.
5.6.2Temperature
Enable temperature control configuration to support heating and
cooling with the energy recovery system. You can fully customize the
control behaviour and limit the influence.
Setpoint Options Default
Energy Recovery System Control Start
Value Heating Setpoint
0–100% 100%
Energy Recovery System Control Start
Delay Heating Setpoint
0–600 s 0 s
Energy Recovery System Control Stop
Delay Heating Setpoint
0–600 s 0 s
Energy Recovery System Control Start
Value Cooling Setpoint
0–100% 0%
Energy Recovery System Control Start
Delay Cooling Setpoint
0–600 s 0 s
Energy Recovery System Control Stop
Delay Cooling Setpoint
0–600 s 0 s
In addition, the frost protection can be individualized further
depending on your Anti Icing Type.
Advance Frost Protection
Setpoint Options Default
Temperature Margin Setpoint 1) -60-210°C 4°C
Hysteresis Temperature Setpoint 0-10K 2K
Dew Point Offset Setpoint 1-5K 1K
Cycle Time Bypass Damper Setpoint 2) 0-10min 6 min
Step Size to Increase Damper Setpoint 1-10% 10%
1) Temperature margin to calibrate error.
2) Cycle time bypass damper before next change of value.
5.6.3Humidity
Enable humidity control configuration to support humidification
and dehumidification with the energy recovery system. You can fully
customize the control behaviour.
Setpoint Options Default
Energy Recovery System Control Start
Value Dehumidification Setpoint
0–100% 0%
Energy Recovery System Control Start
Delay Dehumidification Setpoint
0–600 s 0 s
Energy Recovery System Control Stop
Delay Dehumidification Setpoint
0–600 s 0 s
Energy Recovery System Control Start
Value Humidification Setpoint
0–100% 0%
Energy Recovery System Control Start
Delay Humidification Setpoint
0–600 s 0 s
Energy Recovery System Control Stop
Delay Humidification Setpoint
0–600 s 0 s
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5.6.4Energy Calculation
Enable the energy calculation by setting up the energy recovery
system and temperature eiciency. This will also enable energy
monitoring for the heat recovery system.
.PREHEATER
The preheater is used to keep the filter dry and/or to protect the
energy recovery system from freezing. The type of preheater control
can be configured either as an electrical heater control or a pump/
valve (LPHW) control. Electrical heater control can only be configured
when the supply air fan is on and there is an airflow through the
outdoor air filter.
Select the Outdoor Air Preheater Control Type of one of the following:
• Outdoor Air Filter Temperature. This will set the preheater to
activate and maintain a certain filter temperature if an outdoor air
temperature sensor is located at your filter.
• Energy Recovery System Icing Temperature. The preheater will
maintain a set icing temperature for flow or plate heat exchanger.
Configure each setpoint for the energy recovery system separately.
• Outdoor Air Filter + Energy Recovery System Icing Temperature.
Combine both functions.
• Advance Frost Protection. Enable the preheater to support advanced
frost protection. This will keep the unit running on outdoor air but
will consume more energy.
Refer to Heater below for additional configurations.
.HEATER
In general, water coils can be used for heating or cooling of the air
using the water as a medium. The heater is your main heating source
and can be adjusted with the following parameters:
Setpoint Options Default
Supply Air Control Start Value Heating
Setpoint
0–100% 10%
Supply Air Control Start Delay Heating
Setpoint
0–600 s 0 s
Supply Air Control Stop Delay Heating
Setpoint
0–600 s 0 s
With these you can control how fast the heater will respond to a
heating demand. Configure delays to ensure that short temporary
temperature changes will not aect the overall heating process.
Under some certain conditions of temperature and humidity, frost can
be form on the surface of the coil. Following controls are applied to
each configured heating/cooling coil:
Frost Case Avoidance
Refer to "Frost Case Avoidance" on page 18 for more information.
Note: For all heaters there is the option to configure electrical heaters
which can be selected in "6.7 Preheater" on page 25, "6.8 Heater"
on page 26 and "6.11 Reheater" on page 26. In this case you
need to have a flow sensor to prevent fire or overheating and damage
to the unit.
.COOLER
The cooler can be configured similar to the heating coil but can also
support dehumidification when enabled.
Setpoint Options Default
Supply Air Control Start Value Cooling
Setpoint
0–100% 10%
Supply Air Control Start Delay Cooling
Setpoint
0–600 s 0 s
Supply Air Control Stop Delay Cooling
Setpoint
0–600 s 0 s
.FAN
To enable the fan control select the applicable fan type: supply air or
extract air. First select a control type of the following:
• None (Default)
• Manual
• Volume Flow
• Pressure
• Slave Volume Flow
• Slave Setpoint
This allows to set the minimum and maximum setpoint/limits of your
fan and configure limiting the fans via dierent conditions.
K-factor
The K-factor is a value that is used when measuring and adjusting the
airflow. If there is more than one fan in the airflow, the K-factor in this
menu is only given for one fan. The airflow is caclulated according to
this formula:
number of fans
The number of fans is 1–3 depending on the dimension of the air
handling unit.
Supply Air Fan Control Shi
• No Shi Active
• Control active
• Increase Via External Fan
• Limiting via Outdoor Air temperature active
• Limiting via Recirculation Air operation active
• Limiting Via Defrosting
• Limiting Via Danfoss VSD Warmup
To enable setpoint shiing of the fan by another source, such as
limiting the fan speed via to outdoor air, set this option to your
desired value. Control active enables general shiing of the fan
setpoint. To customize limiting the fan depending on the outside/
recirculation air there are subfolders available. However, this is not
available with slave mode.
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Limit via Outdoor Air temperature active
Setpoint Options Default
Fan Control Limit Via Outdoor Air Start
Setpoint
-40–10°C 0°C
Fan Control Limit Via Outdoor Air Stop
Setpoint
-40–10°C -10°C
Fan control outdoor air limiting
-5
Temperature in °C / Fan setpoint (relative)
-10
-15
-20
-25
-30
15
10
5
0
Outdoor air
temperature
Outdoor
air start
Outdoor
air stop
F
an setpoint
The setpoint for the fan is shied from minimum value of the setpoint
to the current control setpoint during the outdoor air stop to outdoor
air start period. If the outdoor temperature is above the outdoor air
start value or below stop value, the function will have no eect on the
setpoint. This function can also be activated if extract/exhaust fan is
controlled by slave setpoint enabling a separate minimum setpoint.
• Extract Air Fan Control Slave Percent Minimum Setpoint (Default:
30%; Range: 0-100%)
Limit via Recirculation Air operation active
Setpoint Options Default
Supply Air Fan Control Limit Minimum
Recirculation Air Setpoint
0–100% 5%
Supply Air Fan Control Limit Maximum
Recirculation Air Setpoint
0–100% 10%
Enable automatic operation for the fans in the General folder.
This means it is possible to enable the shiing operation from
temperature/humidity control, etc. It is also possible to keep the
balancing of supply air/extract air fans during shiing until it exceeds
the maximum. This works only if the control types are the same for
both fans
• Fan Automatic (default: On)
• Fan Keep Balancing (default: On)
• Fan Sliding Changeover Enable (default: On)
The behaviour during changeover is customizable. If you plan to
configure temperature or humidity control support with the fans, also
set the Fan Control Priority Selection to the desired one.
• None
• Priority Temperature. The controller will set priority on temperature
control
• Priority Humidity. The controller will set priority on humidity control
In addition, supply air and extract air fans have a volumeflow
redundancy function calculating volumeflow by duct pressure. The
Airflow Adjustment can also be carried out in this menu, but is easier
through the Smart Menu. Refer to "Airflow adjustment mode" on page
9.
5.10.4Temperature
If the temperature control is enabled, it shis the nominal fan setpoint
to minimum/maximum fan setpoints according to the temperature
control configured.
Setting Options Default
Temperature Control Fan Mode • None
• Heating
• Cooling
• Heating/
Cooling
• Outdoor Air
Compensation
None
Temperature Control Type Fan
Control Heating
• None
• Energy 1)
• Load 2)
• Energy/Load
None
Temperature. Control Type Fan
Control Cooling
• None
• Energy 1)
• Load 2)
• Energy/Load
None
Temperature Control Fan Control
Setpoint
50–99% 99%
Temperature Control Fan Hysteresis
Setpoint
1–20% 10%
Temperature Control Fan Control
Increase Loop
– 0.01/30/0
Temperature Control Fan Control
Decrease Loop
– 0.001/30/0
1) The fan decreases the volume flow, until the setpoint is reached or
the air medium is in the minimum/maximum range. This function
is used to reduce the energy consumption, if the maximum control
demand is requested.
2) If the minimum/maximum limits are reached, but the premises
need more load, the fans increase the fan speed until the setpoint is
reached.
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5.10.5Humidity
If the humidity control is enabled, it shis the nominal fan setpoint to
minimum/maximum fan setpoints according to the humidity control
configured in the humidity section.
Setting Options Default
Humidity Control Type Fan Control
Humidify
• None
• Energy 1)
• Load 2)
None
Humidity Control Type Fan Control
Dehumidify
• None
• Energy 1)
• Load 2)
None
Humidity Control Fan Control Setpoint 50–99% 99%
Humidity Control Fan Hysteresis Setpoint 1–20% 10%
Humidity Control Fan Control Increase
Loop
– 0.01/30/0
Humidity Control Fan Control Decrease
Loop
– 0.001/30/0
1) The fan decreases the volume flow, until the setpoint is reached or
the air medium is in the minimum/maximum range. This function
is used to reduce the energy consumption, if the maximum control
demand is requested.
2) If the minimum/maximum limits are reached, but the premises
need more load, the fans increase the fan speed until the setpoint is
reached.
5.10.6Air Quality
If the air quality control is enabled the fan setpoint is increased
depending on the air quality control.
.REHEATER
Control loop information output for Building Management System.
.CONDENSER/EVAPORATOR
Select a defrosting mode. In case of Mitsubishi or Daikin, their own
defrost signal is used to decide if defrosting is active. The same
scenario can be used for ReCooler HP as well. If the defrosting is
active, the following possibilities are available:
• None
• Recirculation Air. If possible, turns on the recirculation mode and
keep the unit running.
• Shutdown. Shuts down the unit until defrosting is active if no other
heating medium is active.
• Lower Airflow. Keeps the unit running with the lower air flow if no
other heating medium is active.
If the lower airflow is used for defrosting, it takes a long time to
deactivate the defrost mode but at the same time no cold air is blown
to the room. In addition, you can enable the Condensor/Evaporator to
support temperature and humidity control by enabling the function
in the General subfolder of it. In the Humidity > General folder it is also
possible to prioritize temperature or humidity.
Oil Recovery
Setpoint Options Default
DX Enable Oil Recovery On/Off Off
DX Oil Recovery Threshold Setpoint 0–100% 80%
DX Oil Recovery Threshold Run Time
Setpoint
0–360 min 120 min
DX Oil Recovery Boost Time Setpoint 0–1000 s 120 s
Dew Point Prevention
Setpoint Options Default
DX Enable Dewpoint Cycle Prevention On/Off Off
DX Mitsubishi Dewpoint Cycle Prevention
Threshold Setpoint
0–100% 55%
DX Mitsubishi Dewpoint Cycle Prevention
Minimum Setpoint
0–100% 35%
DX Mitsubishi Dewpoint Cycle Prevention
Threshold Run Time Setpoint
0–360 min 115 min
DX Mitsubishi Dewpoint Cycle Prevention
Minimum Run Time Setpoint
0–1000 s 20 s
Any DX unit can also be configured to support heating, cooling and
dehumidifying.
.RECOOLER
Enable the Recooler Defrost Fan Compensation if defrosting of the
unit is configured (if applicable). The Recooler can also be configured
to support heating, cooling and humidification control sequences.
To ensure an eicient control loop the recooler can be locked
depending on the outdoor air temperature at which the function gets
deactivated.
.FIRE
Two inputs are used to control the three fire alarms.
• Fire Detector Input 1
• Fire Detector Input 2
Fire Input Configuration Fire
Detector
Input 1
Smoke
Detector
Input 2
Active Fire
Alarms
None Off Off No fire alarms
Fire Detector Input 1 On Off Fire alarm 1 on
Fire Detector Input 2 Off On Fire alarm 2 on
Fire Detector Input 1 + Fire
Detector Input 2
On On Fire alarm 3 on
Apart from the fire inputs, it is also possible to select the fire alarm
type to generate the fire alarm or to detect fire. Following fire alarm
types are available to select.
• None. No alarm is triggered.
• High Supply Air Temperature. If the supply air temperature is greater
than the fire supply air temperature limit, an active fire alarm is
triggered.
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