OPERATION AND MAINTENANCE MANUAL
CAIRplus
WITH ISYteq
We reserve the right to make changes without prior notice
FläktGroup DC-10661-GB 2023-11-27_R0
CAIRplus – Operation and maintenance manual
1. Safety regulations ............................................................................4
Special warning and danger symbols ..................................................7
Function signs .............................................................................................. 8
2. Introduction ........................................................................................9
Document description ............................................................................... 9
Control system .............................................................................................9
Environmental documentation ................................................................9
Product description and intended use ................................................ 9
3. Technical description ...................................................................10
Performance scope .................................................................................. 10
4. Technical specifications .............................................................. 11
5. Commissioning ...............................................................................14
Prerequisites before commissioning ..................................................14
List of steps ..................................................................................................14
Setup wizard ................................................................................................14
Active mixing .............................................................................................. 16
CLOUD for ISYteq .......................................................................................16
6. Maintenance .................................................................................... 17
Explanation of symbols ............................................................................17
Service schedule ........................................................................................ 17
To comply with VDI 6022 ventilation code of practice ................ 18
To clean the casing and the components ........................................ 18
Spare parts .................................................................................................. 18
Warranty ....................................................................................................... 18
Casing ........................................................................................................... 19
Filter replacement .....................................................................................20
Fan (exemplary illustration) ................................................................. 21
Coils ...............................................................................................................22
Droplet seperator ......................................................................................22
Silencer .........................................................................................................23
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.
Plate Heat Exchanger ..............................................................................23
Rotary Heat Exchanger ........................................................................... 24
plug fan with AC Motor/EC Motor .......................................................26
Humidifier ...................................................................................................26
Damper .........................................................................................................27
Run around coil ..........................................................................................27
7. Alarms and troubleshooting ..................................................... 28
To reset alarms ..........................................................................................28
General troubleshooting ..........................................................................28
To read the alarm text correctly ..........................................................28
8. Technical data ................................................................................ 29
Connection ...................................................................................................29
Minimum mains supply .......................................................................... 31
Fan data ........................................................................................................ 31
EMC performance ..................................................................................... 31
9. FAQ ..................................................................................................... 32
10. Appendix .......................................................................................... 34
Maintenance Log Book, CAIRplus .......................................................34
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We reserve the right to make changes without prior noticeFläktGroup DC-10661-GB 2023-11-27_R0
CAIRplus – Operation and maintenance manual
WARNING!
• Read and understand these instructions before operation or
maintenance of the air handling unit. The owner or installation
firm of the air handling unit is responsible for ensuring that
the applicable safety regulations are followed.
• Do not discard this manual.
• Before commissioning of the air handling unit, any open
connections must be protected with protective mesh.
• The air handling unit must not be commissioned until all
electrical and mechanical safety devices are installed.
• Be careful when opening the air purge connections for the hot
water supplied to the air heater. There is a risk of water hammer
or steam leakage.
• If the unit is dismantled, FläktGroup will cease to be responsible
for its compliance with the specified tightness class.
• The doors of the unit are equipped with lockable handles.
Always leave the unit locked and store the keys out of reach of
unauthorised persons.
ELECTRICAL HAZARD!
Main switch/Disconnector
• The unit is equipped with a main switch in the electrical
enclosure. The unit should be equipped also with an external
disconnector.
• Parts that are powered separately require a separate
disconnector.
• Before service or inspection, disconnect the power from all
parts of the unit. Wait at least 5 minute before opening the
inspection doors. Close all inspections doors and restore
disconnectors before restarting the unit.
SAFETY REGULATIONS
• Local rules and regulations must always be followed.
• Do not let unauthorised persons operate the unit. Only let
qualified staff members operate the unit.
• Make sure that all the included parts and tools used for
installing the unit are removed before operating the unit.
• Drain coils if there is any risk of standing water at an air
temperature below the liquid freezing point in the circuit.
• Do not use the disconnectors or main switch to start and stop
the unit.
• Only let authorized personell open the electrical enclosure. Store
the key separately.
• Before opening the electrical enclosure, the main switch must
be off.
• Before electrical work, the entire electrical enclosure must be
disconnected.
DISPOSAL NOTES
The unit contains electrical components and must not
be disposed of together with household waste. Local
and currently valid legislation must be observed!
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PERSONAL INJURY!
• No matter what kind of work is performed on the unit, there is
always a risk of cuts inflicted by the thin sheet metal and heat
exchanger fins.
• This applies especially when carrying out maintenance and
cleaning work on the fin surfaces of heating and cooling coils.
• Risk of impact from the opening doors fitted on the pressure
side.
• Risk of crushing resulting from moving the outside mounted
switch cabinet.
• Danger from the rotating parts such as fans etc.
• Danger due to the hot surfaces and/or media.
• The unit whose centre of gravity is located high up can tip over,
resulting in injury and material damage.
• During transport, pay careful attention to the unit, observe its
behaviour and stay away from any potentially hazardous areas.
• Make sure that no one is locked inside the unit. Walkable units
with a height clearance equal to or greater than 1,280 mm are
equipped with the emergency operating levers on the insides of
the doors for that purpose.
• You must secure smaller units against a person being locked in
by mistake with a padlock e.g. on the door stop.
• High concentration of refrigerant in the air can lead to death
or serious injury.
• High concentrations of refrigerant in the air can numb the
senses and lead to loss of consciousness. Prolonged exposure
may cause irregular heartbeat and sudden death. Very high
concentrations can cause suffocation due to the resulting
reduced oxygen content of the ambient air.
• Never stand beneath the suspended loads, since there is always
a risk that the lifting gear, tackle, ropes or slings are faulty
or damaged.
• Use only the lifting lugs provided by FläktGroup! Make sure that
these are firmly secured before lifting the load.
DAMAGE TO THE UNIT
• If the dampers are abruptly shut during the unit operation,
the unit can be damaged beyond repair as a result of negative
pressure or overpressure.
• A unit whose centre of gravity is located high up can tip over,
resulting in injury and material damage.
• During transport, pay careful attention to the unit, observe its
behaviour and stay away from any potentially hazardous areas.
• Use only the lifting lugs provided by FläktGroup!
• Make sure that the lifting lugs are firmly secured before lifting
the load.
• When entering CAIRplus units, ensure that no loads are applied to
the floor panels.
• For all assembly work, take appropriate measures to ensure that
the load is evenly distributed across the bottom profiles.
• Do not attach any brackets/fixings or similar items to the walls
or frames of the units, unless the unit manufacturer has made
provision for them, as these components can cause leaks.
• Do not step on outside mounted cable trays, switch cabinet or
switches.
• The unit must remain serviceable
DAMAGE TO THE ENVIRONMENT
• Heavily contaminated filters may adversely affect production
processes. Depending on the filtered substances, contaminated
filters should therefore be treated as the special waste and
must be properly disposed of in an environmentally-friendly
manner in accordance with the current directives and laws.
• Do not pollute the environment with the liquid products, refrigerants
or oils.
• Dispose of the iquid products, refrigerants or oils in accordance
with the local laws and regulations to avoid harms to
the environment.
• Ethylene glycol and propylene glycol are categorised as water
pollutants in the Catalogue. This also applies to the mixtures with
water.
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CAIRplus – Operation and maintenance manual
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SHIPPING DAMAGE
Damaged outside packaging
Be careful to obey the following steps in case of the outside
packaging damage:
1. Unpack in the presence of the delivery truck driver and have
the damage certified on the shipping order.
2. Inform the FläktGroup Deutschland GmbH Sales Company
immediately before installation of the unit.
• Claims cannot be processed unless the points above are
complied with.
Damaged contents if the packaging is OK
Be careful to obey the following steps in case of the contents
damage:
1. Once you have established the extent of the damage, report
the damage to the FläktGroup Deutschland GmbH Sales Company
in writing before installation of the unit.
2. Take the photographs of the damaged parts.
3. Possible shipping damage must be reported no later than 4 days
after delivery.
• Claims cannot be processed unless the points above are
complied with.
STORAGE
• Observe the permissible storage conditions between
-10 °C and +50 °C in dry, non-condensing atmosphere. Do not
remove the original packaging until just before installation.
• The original packaging is designed for shipment and transportation,
but not for permanent storage. Take the appropriate measures.
• Protect the unit up until commissioning from installation dust, dirt
and damage!
• Protect the unit from UV radiation and adverse weather.
• If units have been delivered without packaging or the packaging has
already been removed, take the appropriate measures to protect
them up until commissioning from installation dust, dirt and
the effects of weather.
• If the unit has packaging added on-site, make sure that
condensate cannot form below the packaging (make sure that
there is a clearance between the packaging and the casing).
• Always place the units on an even surface for storage or
temporary storage.
• Protect the units against bumps and knocks to avoid damage
to the casing and protruding components.
• If commissioning is not carried out within 3 months following
the delivery, rotate all motor axis and fans through at least 5
revolutions every 3 months.
EXPLOSIVE ATMOSPHERE:
Potentially explosive atmosphere can prove fatal! The unit must
only be operated under the conditions specified on the name plate.
A potentially explosive atmosphere can develop inside and/
or outside the unit both during operation and during downtime
periods. For this reason, it must be assumed that a potentially
explosive atmosphere is present even if the unit is not in operation.
• You should therefore avoid the use of ignition-promoting agents
such as electric tools or electronic devices.
• In particular, smoking and the use of a naked flame are
prohibited in the vicinity of the unit.
• Ventilate the inside and/or the outside of the unit before starting
work.
CAIRplus units must not be operated:
• in potentially explosive atmospheres, except for the versions
that are certified for use in these areas (air handling units
meeting special explosion-protection requirements in
accordance with ATEX Directive 2014/34/EU)
• You must pay special attention to safety instructions, procedures
relating to unit assembly and (electrical) installation instructions
for units operating in potentially explosive atmospheres.
Failure to comply with these regulations may result in explosions,
leading to severe injuries or death!
We reserve the right to make changes without prior noticeFläktGroup DC-10661-GB 2023-11-27_R0
CAIRplus – Operation and maintenance manual
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CAIRplus – Operation and maintenance manual
To connect - counter hold with a pipe wrench.
Attention: fi re risk. Dust-laden fi lters are infl ammable.
Before opening, use the main isolator to disconnect power.
Risk of injury. Wait until complete stop before opening.
Type sheet and assembly instructions attached to unit inside.
Remove these documents before the unit commissioning.
Do not start up the fan against closed dampers.
Potential equalisation.
To equalize potentials the unit must be connected to an external protective conductor
at the designated points on the base frame.
SPECIAL WARNING AND DANGER SYMBOLS
The following warning and instruction signs can be secured on the unit:
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CAIRplus – Operation and maintenance manual
Fan or compressor,
generally with direction of airflow indicated
Unit heater/cooler for heat recovery
Air/water ECOFLOW
Noise attenuator in unit Unit heater/cooler for heat recovery
Air/steam ECOSTAT
Air filter, generally with
direction of airflow indicated
Unit heater/cooler for heat recovery
Air/air ECOPLAT
HEPA filter, with direction of airflow indicated Unit heater/cooler for heat recovery
Air/air ECOROT
Opposed-blade dampers General air humidifier
Unit heater air/water
Droplet separator
Air cooler air/water ATEX (Explosion proof)
Air cooler
Air/steam/refrigerant
FUNCTION SIGNS
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CAIRplus – Operation and maintenance manual
INTRODUCTION
DOCUMENT DESCRIPTION
This manual contains commissioning and maintenance instructions for
CAIRplus air handling units.
Instructions for replacement of casing parts and components are
delivered separately and not included in this document.
Note: All screenshots and text references to screen items such as
search paths are in English in this manual. If you select a different
language in the Setup wizard, the texts on the screen will be in that
language.
WARNING!
Only let qualified personnel or persons with necessary knowledge do
the operation, commissioning and maintenance procedures described
in this manual. There is a risk of injury or damage to the product if
the procedures are not done correctly. Any work on the refrigeration
circuit may only be performed by certified and licensed personnel in
accordance with the current version of Regulation (EU) No 517/2014
and Regulation (EU) No 2015/2067.
CONTROL SYSTEM
The ISYteq control system can be accessed through the touch display
or via a web browser.
ENVIRONMENTAL DOCUMENTATION
If you are not sure how to disassemble and recycle the product,
contact FläktGroup.
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PRODUCT DESCRIPTION AND INTENDED USE
The CAIRplus units are only intended for handling air and performing
the following jobs:
– filtering normally polluted air
– air heating and/or cooling
– humidifying and/or dehumidifying of air
– heat rejection or heat recovery
– filtering and treatment of air with a high moisture content (special
models, swimming plus or damp rooms for example showers and
changing rooms)
– or combination of the above-mentioned functions.
Proper use also includes observance of the operation manual and
instructions from the manufacturer of the individual components,
as well as the inspection and maintenance intervals stipulated by
FläktGroup.
Improper use:
Any use other than that described above is considered improper. If
necessary, check if your units are suitable for your intended purpose
and application. The manufacturer/supplier is not liable for any
damages arising from improper use. The user alone bears
the risk.
Misuse particularly includes:
– Conveying any other gases except air
– Conveying steam or water
– Coarse filtering and/or filtering any other media except air
– Chopping up or reducing size of materials
The unit is not suitable for handling abrasive media.
It is not allowed to operate CAIRplus units:
– in explosion-risk areas, unless units are certified for use in these
relevant areas (air
handling units meeting special explosion-protection requirements in
accordance
with ATEX Guideline 94/9/EG)
– in rooms with conductive dust
– in rooms with strong electromagnetic fields
– in rooms with aggressive atmosphere that may attack plastics or
cause corrosion
(especially in atmosphere where zinc is particularly susceptible to
corrosion).
– CAIRplus units must not be accessible to the general public.
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CAIRplus – Operation and maintenance manual
TECHNICAL DESCRIPTION
PERFORMANCE SCOPE
CAIR units are generally used for energy-saving supply-air and extract-air indoor ventilation. Due to their modular design, units can be configured
individually to meet particular air-handling requirements and specifications. The transported air can be filtered, heated, cooled and dehumidified,
depending on the application for each case. The aim is to meet the customer specifications concerning required air volume and conditions.
CAIRplus units are used at a central point for comfort air conditioning on commercial and industrial premises for the transportation and treatment of
“normal” air (according to VDI 2089). A range of unit components is available for energy-saving purposes: plate-type heat exchangers, liquid-coupled
heat exchangers and heat pumps with a heat recuperation function.
Units are performed in different sizes and have various capacities. Depending on the application for each case, CAIRplus units are designed for
horizontal air flow and are arranged as double-deck and side-by-side models. Units are only designed for indoor installation. Units for outdoor
installation need have special design.
Thanks to the modular design of the CAIRplus, units ship as complete assemblies or sub-assemblies that can pass through the available on-site
openings in the course of installation. CAIRplus units are also suitable for the modernization and retrofitting of existing buildings due to the number of
available unit sizes and a unit ordering option providing for delivery in small shipment units.
Refer to the following examples demonstrating the basic unit design and its operating principles.
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CAIRplus – Operation and maintenance manual
TECHNICAL SPECIFICATIONS
Refer to the order-related documentation for the specific configuration of your CAIRplus unit (unit drawing with dimensions and technical data).
Operating limits and range of application
Note for type plate and operation manuals!
• Please carefully observe the unit type plate and the operation manuals for the supplied accessories.
• Please refer to the enclosed documentation for the operating limits of special built-in components.
• In frost-risk cases, use antifreeze agents for heating and cooling media.
• Operating limits for CAIRplus special/customized units are available on request.
Note for extreme conditions!
In addition to the air temperature/air humidity of the transported medium, the temperature/ humidity of the ambient air is also
critical.
• Observe the condensation limits.
ATTENTION!
Damage to the unit!
The switch box with control display, frequency inverter with control display and other temperature-sensitive instruments are
designed for indoor installation in frost-free conditions.
Outdoor air : from -30 °C to +50 °C
Air humidity : depending on temperature max. 18 g/kg of dry air
Max. operating pressure
and temperature : Heating/cooling coil 16 bar / 90 °C
Minimum operating
temperature : Heating/cooling coil 6 °C
Notice on extreme
conditions! : In addition to the air temperature/air humidity of the transported medium, the temperature/
humidity of the ambient air is also critical. Environmental factors such as proximity
to sea or ocean must be taken into account when selecting material quality.
Different ambient conditions apply for integrated refrigerating unit.
Permitted storage conditions / permitted air condition for uninstalled units
Air temperature : 5 °C to 50 °C
Air humidity : Store units in a dry, non-condensing atmosphere
Supply voltage
The required supply voltage is specified in the order-related documentation, e.g. 3 phases 400 V (50 Hz) + N + PE.
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CAIRplus – Operation and maintenance manual
Condensation limits
Please pay due attention to condensation limits!
The following diagrams illustrate condensation limits depending on temperature and relative humidity at the installation site for CAIRplus series.
The diagrams are based on normal air values and are calculated using a model box. The given values are approximate figures and can not be used
as a guarantee for avoiding condensation. Depending on different casing components, deviations are possible.
Read example:
Air temperature on unit internal side in °C
Relative humidity on unit external side in %
Air temperature on unit external side in °C
With ambient conditions of 27 °C and 60 % relative humidity, air temperature in unit may amount to -0,5 °C without formation of condensate.
CAIRplus plus SX S = partially thermally separated
Condensation diagram for kb-value: 0.62
Air temperature on unit internal side in °C
Relative humidity on unit external side in %
Air temperature on unit external side in °C
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CAIRplus – Operation and maintenance manual
With ambient conditions of 27 °C and 60 % relative humidity, air temperature in unit may amount to -1 °C without formation of condensate.
CAIRplus plus SX T = partially thermally separated
Condensation diagram for kb-value: 0.68
Air temperature on unit internal side in °C
Relative humidity on unit external side in %
Air temperature on unit external side in °C
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CAIRplus – Operation and maintenance manual
COMMISSIONING
PREREQUISITES BEFORE COMMISSIONING
• Make sure that the unit and all components and accessories are
installed correctly.
• Make sure that the unit is installed with the accessories necessary
to decrease transmission of sound and vibrations.
• Make sure that the electrical connections are done correctly.
• Use applicable personal protective equipment to prevent injury
during commissioning.
LIST OF STEPS
Follow the instructions below regarding any parts that are included in
your unit.
1. Make sure that the unit is electrically disconnected.
2. Check that the unit is horizontal.
3. Check that the inspection doors open and close smoothly. Adjust
the hinges if necessary.
4. Check that the unit is clean on the inside and on the outside.
5. Dampers with actuators – Check that the connected dampers are
in the closed position when the damper actuators are in their end
position.
6. Filter – Check that the filter cassettes are in place and the locking
system is closed.
7. Rotor (for CAIRplus with Rotary Heat Exchanger only) – Check that
the rotary heat exchanger rotates easily when pushed manually. If
not, the rotor on the CAIRplus can be adjusted.
8. Manometers and flow sensors – Check that the sensors are set
on 0 and connected correctly (+/–) to the test points.
9. For other functions, follow separate instructions.
10. Check that all the safety restraints have been removed.
11. Switch on disconnectors and turn on the main power switch.
12. The basic control system settings are factory configured, but
certain settings must be customised for each installation. Finish
configuring the control system by going through the setup wizard
on the touch display or via a web browser on your computer.
Refer to ”Setup wizard” on page 14 for details.
13. Set the operating mode to automatic.
a. Select Operating data > Unit Main Switch > On
b. Select the operating mode tile on the dashboard.
c. Select Automatic.
14. If the unit has active mixing, do a 0-calibration. Refer to ”To do a
0-calibration” on page 16 for instructions.
15. Adjust the duct system and the air terminal devices.
SETUP WIZARD
The Setup wizard can be run on the touch display or via a web
browser on a computer with Ethernet connection to the unit. Type the
IP address 192.168.0.1 in the address bar of the web browser. In some
cases you might need to configure your LAN IPv4 address to static and
restart your computer before you can connect to the unit.
To log in and select language
• Enter user name ”Admin” and password ”Admin” and select ”LOGIN”.
If the entered information is incorrect, a notification appears. If the
entered information is correct, the Setup wizard starts.
To navigate the Setup wizard
At the bottom of the screen there are four navigation icons.
A B DC
• To confirm all settings in the current step of the Setup wizard and go
to the next step, select save (A).
• To skip to the next step in the Setup wizard without saving any
changed settings, select skip (B). It is recommended to use the skip
function if you want to use the preconfigured settings and be sure
that you do not change anything.
• To cancel the changes made in the current step of the Setup wizard
and restore the previous settings, select cancel (C).
• As you go through the Setup wizard, the headings in the list on
the left side of the screen become green. To go back and change
already made settings, select a green heading.
• To exit the Setup wizard, select exit (D).
Language settings
• Select a flag to select the corresponding language and select save
to go to the next step.
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CAIRplus – Operation and maintenance manual
Time, date and units
The first tab (A) is selected automatically.
1. Select the dropdown menus to set the time zone.
2. Select the clock icon to set the time.
3. Select the calendar icon to set the date.
4. Select save or skip to go to the next tab (B).
5. Select the dropdown menus to set the applicable units.
6. Select save.
Edit profiles
You can configure up to five profiles. There are separate profiles for
Boost and Standby/Off. You can create individual time schedules for
each profile.
• You can change the name on all profiles except the Boost profile.
The Boost profile starts the unit before the set start time to make
sure that the temperature is correct at the start time.
• It is necessary to have a profile for night operation. In the night
profile, set the temperature control mode to Nightpurge and select to
enable the unit via temperature control.
• The profile tab on the far right is for Standby/Off. To activate
room frost protection for Standby/Off, select to enable the unit via
temperature control.
1. Configure the profiles as is necessary for your unit application.
2. Select save.
Unit operation scheduler
This step lets you create a weekly schedule where you can select
different profiles for different time periods. The profile for unit off is
applied to the whole week until you add other profiles.
1. Select the week day for which you want to add a profile. A popup
with three icons appear.
A C
B
a. Select (A) to add a profile and select time period for that profile.
b. Select (B) to edit the profile.
c. Select (C) to close the icons popup without making any
changes.
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2. To edit an already added profile, select that profile. A popup with
six icons appear.
D E F G H J
a. Select (D) to add a different profile to the time period.
b. Select (E) to edit the currently selected profile.
c. Select (F) to copy the profile and apply it to another time period.
d. Select (G) to delete the profile from the weekly schedule.
e. Select (H) to change the start and stop time for the profile.
f. Select (J) to close the icons popup without making any changes.
3. Select the right tab (K) to set up exceptions for specific days,
weeks or months.
K
4. When the weekly schedule is finished, select save.
Start up settings
This step lets you configure how the unit starts depending if it is
summer or winter. You can set the temperature threshold, the startup
delays and the damper delay. Make sure that the settings are correct
for the local weather conditions.
• When the start up settings are finished, select save.
• If you are not sure how to do these settings correctly, select skip.
To set default page and finish the Setup wizard
1. Select Control schematics or Dashboard to set the default page
for the user interface.
2. Select save. A notification asks you to restart the unit to apply all
settings.
3. Select save to restart the unit and load the selected default page.
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CAIRplus – Operation and maintenance manual
ACTIVE MIXING
Active mixing is an energy recovery function using flow controlled
recirculation via dampers. The function is initialized with minimization
of the differential pressure over the mixing damper. This is done with
the extract air damper or the outdoor damper, depending on the
pressure setup of the installation. After that, the mixing damper and
the outdoor damper are controlled in parallel for mixing the air.
The exhaust fan is controlled to keep the flow balance in the unit. A
minimum level of fresh air can be set in each profile. If full recirculation
is allowed, the exhaust air fan is stopped and the mixing damper is
fully open.
To do a 0-calibration
For correct functioning of the active mixing, it is necessary to do a
0-calibration during commissioning. The unit shows a low level alarm
on the screen until the calibration is executed.
1. Set the operating mode to automatic.
a. Select Operating data > Unit Main Switch > On
b. Select the operating mode tile on the dashboard.
c. Select Automatic.
2. Select Operating data > Control > Damper > Calibration > Set
Damper Control ODA Amount Start Calibration > On.
The automatic calibration process starts. The unit runs the fans in
stable condition at maximum speed an then at 25% of maximum
speed.
CLOUD FOR ISYTEQ
CLOUD for ISYteq is a cloud service. The connection of the air handling
unit to CLOUD for ISYteq is done differently depending on the type of
internet access.
To connect with LAN
1. Make sure that the LAN firewall allows PPTP (port 1723) and GRE
(port 47) protocols.
2. Connect an Ethernet cable between the controller and the
assigned LAN network port.
3. Select Settings and device information in the menu bar.
4. Select Configuration > Network > TCP/IP > Interface.
5. Make sure that the row dyn_cloud under the section Dynamic has
green marks.
To connect with the built-in GSM modem
1. Put the GSM antenna in a position where the GSM signal can be
found.
2. Check the reported signal strength.
a. Select Settings and device information in the menu bar.
b. Select System > Diagnosis > Modem.
c. Read the value under Network state – Signal. The GSM signal is
sufficient if the level is green.
3. Select Settings and device information in the menu bar.
4. Select Configuration > Network > TCP/IP > Interface.
5. Make sure that the row dyn_cloud under the section Dynamic has
green marks.
Troubleshooting
Problem Solution
The row dyn_cloud does not have
green marks.
• If connected with LAN, check
the LAN firewall settings.
• If connected with the built-in
GSM modem, check the GSM
signal strength.
• Check the factory loaded
parameter settings in the
controller.
The GSM signal is not sufficient. • Move the GSM antenna to a
better position.
• Use a longer antenna cable.
Max. length 15 m.
The firewall is blocking the used
protocols for LAN.
• Contact the IT operations and
request openings in the firewall.
• Contact FläktGroup for support.
The air handling unit does not
connect to CLOUD for ISYteq.
• Check the internet settings.
• Check the controller CLOUD
settings.
• Check the CLOUD portal settings
Contact FläktGroup for support.
The air handling unit is connected
to CLOUD for ISYteq but not logged
in to the CLOUD portal.
• Log in with the user account
credentials on the CLOUD Quick
Guide delivered with the air
handling unit.
Note for special software function!
This section does not refer to the standard
mixing function.
• Use the ”active mixing” function.
• Active mixing can be detected by the pressure
sensor used to measure the differential
pressure above the energy recovery.
5
17
We reserve the right to make changes without prior noticeFläktGroup DC-10661-GB 2023-11-27_R0
CAIRplus – Operation and maintenance manual
MAINTENANCE
EXPLANATION OF SYMBOLS
Clean
according to
instructions
General
inspection
Hygiene
standard
according to
VDI 6022
Check
function Replace
SERVICE SCHEDULE
Service schedule including intervals (month*) within the VDI ventilation
code of practice VDI 6022, Part 1 (**)
3* 6* 9* 12*
6* 12*
12*
**
Casing
Filter
Fan
Humidifier
Damper
Outdoor with extra
roof
Coils
Silencer
Plate heat
exchanger
Rotary heat
exchanger
Plastic tubes
and parts for
measurement
6
Fan assembly!
• Check fans and motors for secure mountings, debris, damage and
corrosion.
• Check anti-vibration dampers for proper operation.
• Check impeller for cracks, if is out-of-balance, bearings
• Check fan/motor for bearing noise, replace bearing(s) if necessary.
• Adhere to the recommended lubrication intervals for non-sealed fan
bearings
18
We reserve the right to make changes without prior noticeFläktGroup DC-10661-GB 2023-11-27_R0
CAIRplus – Operation and maintenance manual
SPARE PARTS
• Use only original FläktGroup spare parts. FläktGroup is not liable for
damages caused by spare parts that are not original.
WARRANTY
For warranty claims, a written and signed maintenance protocol and
commissioning protocol is necessary. FläktGroup will not be liable if
the product is not assembled, installed, commissioned or maintained
according to the instruction manuals included with the product.
TO COMPLY WITH VDI 6022 VENTILATION CODE OF PRACTICE
• Use a full cover and protective gloves during service and
maintenance.
• Clean all surfaces and components according to the instructions to
make sure that they are free from dirt and contaminant.
Note: We recommend that the system is never operated without
the filters. Keep a set of spare filters in stock as well.
TO CLEAN THE CASING AND THE COMPONENTS
CAUTION!
Do not use acetone, chlorine or other similar liquid solvents.
For disinfecting unit surfaces, use cleaning agents on the German
Society of Hygiene and Microbiology (DGHM) list, or which have
German Veterinary Medicine Society (DVG) or Association for Applied
Hygiene (VAH) certification. Ensure you comply with the concentrations
and exposure times specified there. Possible cleaning agents are e.g.
BODE Microbac or DESOMED Desotop. For the correct concentration,
refer to the data sheet provided by the manufacturer and/or select a
non-visible small surface to test the solution there beforehand.
• The use of hydrogen peroxide H
2
O
2
or other oxidising agents for
disinfection purposes is not permitted.
• Alcohol-based solutions are not permitted due to the risk of
explosion and fire.
• Treat galvanised parts with protective spray.
• Vacuum clean and dry off with a wet cloth.
• Use dish soap to clean the casing. Rinse with clean water after
using detergent.
• If necessary, disinfect the casing.
• After cleaning make sure that all surfaces are dry.
• Replace components that cannot be cleaned or have grown fungus
or mold.
Note to replace the filters regularly!
The filters must be replaced regularly to prevent
a pressure drop.
• With every maintenance
• When the control system indicates this
6
19
We reserve the right to make changes without prior noticeFläktGroup DC-10661-GB 2023-11-27_R0
CAIRplus – Operation and maintenance manual
CASING
6
20
We reserve the right to make changes without prior noticeFläktGroup DC-10661-GB 2023-11-27_R0
CAIRplus – Operation and maintenance manual
FILTER REPLACEMENT
6
A: Tensioner closed
B: Tensioner open
Lift off the spring and turn it 90°.
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