Pichler LBE 250AO Specification sheet

OPERATING AND
INSTALLATION MANUAL
LBE 250AO
VDI 6022, Sheet 1 (01/2018)
SWKI VA104-01 (01/2019)
ÖNORM H 6021 (08/2016)
VDI 3803, Sheet 1 (05/2020)
'ĞŶĞƌĂůǀĞŶƚŝůĂƚŝŽŶĂŶĚĂŝƌ
ĐŽŶĚŝƚŝŽŶŝŶŐƚĞĐŚŶŽůŽŐLJ
Air humidification unit model “LBE
250A” / “LBE 500A”
,LJŐŝĞŶĞ–ŽŶĨŽƌŵŝƚLJdĞƐƚŝŶŐ
W-351037-21-JRoll
sĂůŝĚŝƚLJWĞƌŝŽĚ
10/2021 - 10/2026
Systematic ventilation.
COMFORT
VENTILATION

OPERATING AND INSTALLATION MANUAL LBE 250AO PAGE 2
USERS GENERALSPECIALIST PERSONNEL
Contents
GENERAL
1. Introduction Page 4
2. General Page 4
3. Designated use Page 5
3.1 Liability Page 5
3.2 Warranty Page 5
4. Safety Page 6
4.1 General Page 6
4.2 Unit setup – installation Page 7
5. Transport and storage Page 9
5.1 Dimensions and weight Page 9
5.2 Packaging Page 9
5.3 Storage Page 9
5.4 Check for completeness Page 9
5.5 Scope of delivery Page 9
5.6 Disposal Page 9
USERS
6. Device structure Page 10
7. Versions Page 11
8. Functional description Page 11
8.1 Working principle Page 11
8.2 Reverse osmosis Page 12
8.3 UVC disinfection Page 12
8.4 Standby mode Page 12
8.5 Start phase for active air humidification / switch-on sequence Page 12
8.6 Active air humidification / regular operation Page 12
8.6.1 HUMIDITY CONTROL PAGE 12
8.6.2 EVAPORATION PERFORMANCE PAGE 12
8.7 Controlled shutdown / switch-o sequence Page 12
8.8 Daily water change Page 12
9. Regulation and control Page 13
9.1 Control unit (display) / basic settings Page 13
9.2 Main screen (Home) Page 14
9.3 Main menu Page 16
9.4 Operating values and unit information Page 16
9.4.1 MAXIMUM OPERATING TIMES PAGE 16
9.4.2 UVC TUBE OPERATING TIME PAGE 17
9.4.3 WATER FILTER OPERATING TIME PAGE 17
9.4.4 OSMOSIS FILTER OPERATING TIME PAGE 18
9.4.5 AIR HUMIDIFIER OPERATING TIME PAGE 18

OPERATING AND INSTALLATION MANUAL LBE 250AO PAGE 3
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9.5 Messages Page 19
9.5.1 FAULT MESSAGES PAGE 19
9.5.2 OPERATING TIME WARNING MESSAGE PAGE 19
9.6 Settings Page 20
9.6.1 TARGET AIR HUMIDITY PAGE 20
9.6.2 DAILY WATER CHANGE PAGE 20
9.6.3 WATER HARDNESS PAGE 20
9.6.4 RELEASE PAGE 21
SPECIALIST PERSONNEL
9.7 Service / maintenance Page 22
9.8 Test mode Page 23
10. Technical specifications Page 24
10.1 Pressure loss characteristics Page 24
11. Layout sketch Page 25
12. Mounting Page 25
12.1 Requirements for installing the unit Page 25
12.2 Minimum clearances to be observed Page 26
12.3 Installing the air humidification unit Page 26
12.4 Relocating the temperature sensors Page 27
12.5 Air line connections Page 30
12.6 Waste water connection Page 30
12.7 Drinking water connection Page 30
12.8 Removing the shipping restraints Page 31
13. Electrical connection Page 32
13.1 External connection (release / Modbus) Page 33
13.1.1 MODBUS CONNECTION PAGE 34
14. Error messages and max. operating times Page 35
15. FAQ Page 35
16. Maintenance (professional) Page 36
16.1 UVC tube replacement Page 36
16.2 Maintaining the reverse osmosis unit and rotor blades Page 37
16.3 Maintaining the water filter Page 39
16.4 Service table Page 40
17. Accessories and spare parts Page 41
18. Firmware updates Page 41
19. Hygiene certificate Page 42
20. EG-Konformitätserklärung / EC Declaration of Conformity Page 43

OPERATING AND INSTALLATION MANUAL LBE 250AO PAGE 4
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1. Introduction
The LBE 250AO air humidification unit complies with the state of the art. It oers excellent operating safety, user comfort and cost-ef-
fectiveness.
In order to operate your air humidification unit safely, properly and economically, read and observe this operating manual carefully.
Use the air humidification unit only when in perfect condition and for its designated use, be aware of safety and any hazards and bear
in mind all of the notes and information contained in this manual.
Please always keep the model and serial number (see nameplate on unit) at hand in the case of queries or when ordering spare
parts.
If you have further questions, please contact us.
Please keep this operating manual in a safe place and readily available at all times.
Please contact us if you lose this documentation.
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5
T [phone]
2. General
This chapter contains general information on the LBE250AO air humidification unit.
READ THIS MANUAL CAREFULLY BEFORE OPERATION.
This manual contains notes and information regarding the safe use, proper installation and operation as well as maintenance of the
LBE250AO air humidification unit. Furthermore, reference this manual during servicing to ensure proper execution of the tasks. Keep
this operating manual readily available in a safe place.
Troubleshooting on and access to the air humidification unit may be performed by an installation company (specialist company) only.
Changes reserved:
This manual has been compiled with the utmost care. This does not, however, imply any rights. We constantly strive to improve and
optimise our products technically and we reserve the right to modify our apparatus or technical data fully or in part and without prior
notification. Your unit may therefore vary slightly from the description in this manual.
Our "General terms and conditions" in their latest version apply.
Device type:
08LBE250ARO
Year of manufacture:
09/2023
Air volume flow rate:
max. 350 m
3
/h
Dimensions L x D x H:
360 mm x 360 mm x 385 mm
Weight:
25 kg
Voltage/frequency:
230 V / 50 Hz
Power consumption:
max. 100 W
Water intake pressure:
0.35-0.7 bar
Serial number:
C21090010
KLAGENFURT 9021
AUSTRIA
Karlweg 5
T [phone]
www.pichlerluft.at
J.Pichler
Gesellschaft m.b.H.
www.pichlerluft.at

OPERATING AND INSTALLATION MANUAL LBE 250AO PAGE 5
USERS GENERALSPECIALIST PERSONNEL
3. Designated use
The LBE 250AO air humidification unit is intended for installation or retrofitting in combination with a heat pump combi-unit PKOM4
with a maximum air volume flow of 350m³/h.
This unit is available to the general public and is intended for installation in residential or industrial buildings.
The compact air humidification unit works on the natural evaporation principle and enables constant, optimal humidity levels in the
supply air.
In addition, the supply air is kept at a constant temperature thanks to an integrated air heater.
Designated use also includes adherence to our prescribed operating and installation manual. Only qualified personnel may work
on and with the unit. Persons transporting or working on the unit must have read and understood the Operating Manual, especially
chapter4 "Safety".
The LBE250AO air humidification unit is not a ready-to-use product. It must not be put into operation until it has been properly in-
stalled and connected to the ventilation system.
The air humidification unit is not suitable for outdoor installation. It may only be installed in appropriate and temperature-controlled
indoor spaces.
Changes reserved
It is our constant endeavour to technically improve and optimise our products and we reserve the right to change the design of the
units or the technical specifications without prior notice.
3.1 Liability
The LBE 250AO is a compact, automatic unit for the active humidification of the supply air in ventilation systems.
Any other use is deemed improper and may lead to personal injury or damage to the LBE250AO air humidification unit, for which the
manufacturer accepts no liability.
The manufacturer accepts no responsibility for any damage due to:
• non-compliance with the safety, operating and servicing instructions given in this operating and installation manual
• the installation of spare parts that have not been supplied by the manufacturer, the responsibility for the use of such spare parts
being fully borne by the system builder/installer
• normal wear and tear
3.2 Warranty
The warranty period starts upon commissioning, and at the latest one month after successful delivery. Warranty details can be
found in our “General terms and conditions” in their latest version as well as the merchant conditions of your respective country. The
warranty shall be subject to proof of services performed as per our instructions and executed by a licensed installer/specialised
company.
Warranty claims shall be limited to material and/or constructional defects occurring during the warranty period. In the event of a
warranty claim, the LBE250AO air humidification unit must not be dismantled without prior written authorisation from the manufac-
turer. The manufacturer's liability shall be limited to spare parts installed by an installation company approved by the manufacturer.
The warranty shall automatically lapse at the end of the warranty period, following improper operation, if parts other than original
manufacturer-supplied parts are installed, or if unauthorised changes or modifications are made to the air humidification unit.
The warranty is voided automatically by failure to comply with the information in this operating and installation manual.

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4. Safety
Read this operating and installation manual carefully and observe the safety instructions while you carry out installation,
commissioning, servicing or general work on the air humidification unit. Keep the operating and installation manual near
the unit for its entire service life.
Always observe the safety regulations, warnings, notes and instructions given in this manual. The specifications given in this docu-
ment must not be altered. Failure to observe these safety regulations, warnings, notes and instructions may lead to physical injury or
damage to the air humidification unit.
The conclusion of a service contract is recommended to ensure that the unit will be checked at regular intervals. Ask your supplier
about approved specialised companies/installers in your area.
SYMBOLS USED
The following safety symbols highlight text containing warnings in respect of danger and potential hazards.
Please familiarise yourself with these symbols.
Note!
Attention! Ignoring this warning may lead to injury or threat to life and limb and/or damage to the unit.
Attention – High voltage!
Ignoring this warning may lead to injury or threat to life and limb.
Installation, initial start-up, maintenance and repairs must only be carried out by an authorised specialist company. Over and above
this operating and installation manual, local and national regulations and standards shall also apply to the operation of this unit
without limitation. Take instruction from your installer on the unit and on its control unit following installation. The air humidification
unit may only be used in accordance with the information provided in chapter3 - Intended use. All safety and danger notices attached
to the unit and specified in this description must be observed.
In the event of malfunctioning, switch o the unit immediately and disconnect the power plug. The unit must be appropriately secured
against restart. Faults must be remedied immediately. After repairs and maintenance work, qualified personnel must verify that the
unit is safe to operate. Attachment or installation of additional parts and components is not permitted. Any modification of the air
humidification unit is prohibited. Only original spare parts may be used. Modifications and alterations to the air humidification unit are
prohibited and absolve the manufacturer from all warranties and liability.
4.1 General

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Damage arising from a failure to comply with the operating and maintenance manual is not covered by the warranty.
This unit is not intended for use by persons, including children, with limited physical, sensory or mental capacities or lacking experi-
ence and/or knowledge, unless under supervision or instruction of a person responsible for their safety. Ensure that children do not
play with the unit.
After commissioning, the power supply and water supply may not be interrupted for longer than one day after commissioning in
order to ensure that hygiene requirements continue to be met.
Switching o the ventilation system
If the PKOM4heat pump combi-unit is taken out of operation for more than one day, the air humidification unit must be
switched o at least two hours beforehand. This will dry out the air humidification unit and ensure continued hygienic func-
tion.
Working on the device
Installation, commissioning, service and repairs must be carried out by an authorised specialist (specialised heating compa-
ny/installer). When working on the unit, it must be switched o and secured to prevent switching on. The water supply must
be interrupted.
UVC disinfection tube
The unit is fitted with a UVC tube as standard. This may only be replaced with a type as marked on the unit, in its original packaging.
The UVC tube may only be replaced by an authorised specialist! Before opening the unit or replacing a UVC tube, the unit
must be switched o, and the power plug removed from the socket. Never look at the UVC light source without protection
when it is switched on.
4.2 Unit setup – installation
The national and local regulations must be heeded when installing and setting up the unit. The unit may only be installed in compli-
ance with national installation regulations. Installation must be carried out in accordance with the general local building, safety and
installation regulations of the relevant community or the water and electricity department and other bodies.
The unit may only be installed in frost-free and dry rooms. The room temperature at the place of installation must be consistently
between +5°C min. and +35°C max.
The unit is designed for wall mounting and may only be set up on a suitable, load-bearing structure. The unit must not be exposed to
vibration of any kind.
Air ducts for the ventilation system which are not installed in heated areas must be appropriately thermally insulated (risk of temper-
atures dropping below the dew point) in order to avoid any build-up of condensation.
In structures such as windows with poor thermal insulation characteristics or faulty structural design as well as in old buildings, low
outdoor temperatures and increased room air humidity in living areas can lead to a build-up of condensation, for example on the win-
dow glass. The surface temperature of these components must be above the dew point temperature of the room air (approximately
+15°C at least).
During normal operation, the build-up of germs and mould in the unit is prevented, as the water in the humidification unit is continu-
ously treated and sterilised during operation.

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Mounting
The unit is intended for horizontal mounting. It may deviate by a maximum of +/- 1° from the horizontal and must be mounted on a
massive, load-bearing wall. The operating weight of the humidification unit must be taken into consideration when suspending the
unit in order to prevent any hazard. These tasks may only be carried out by authorised specialists.
Water connections
Water, heating and waste water connections must be set up by qualified personnel. Only the supplied original connecting hoses may
be used to connect to the water supply. Ensure that the lines are watertight. The maximum water pressure of the drinking water
connection is 0.7MPa and that of the water heating battery is 1MPa – these must not be exceeded. The installation of a water stop
valve is compulsory.
Water quality
Only drinking water which complies with the Austrian Drinking Water Ordinance may be used for the water supply. The connection to
the drinking water pipe must be set up using the connection set supplied. If the chlorine content exceeds 0.1mg/l, the standard water
filter (5μm) must be replaced with a dual filter (5μm / carbon). If the iron content of the drinking water exceeds a value of 0.1mg/l,
an iron filter must also be installed in the water supply pipe.
The unit can be used with a maximum water hardness of 26°dH. If this value is exceeded, the lifespan of the osmosis membrane will
be significantly reduced.
Operating the unit
Any work practices that could potentially impair the safety of the unit are prohibited. All warning and protective equipment must be
checked regularly to ensure that they function correctly. Safety devices may not be removed or switched o.
Assembling, dismantling, maintaining and repairing the unit
The unit must be switched o when performing maintenance work or repairs. No additional equipment may be added on or installed.
In this instance, you should discuss this with the manufacturer.
Electrics/electronics
Work on the electrical system parts may only be carried out by a qualified electrician. The unit must be switched o when performing
maintenance work or repairs. Switch o the unit immediately in the event of any fault in the electrical power supply. Only
use original fuses with the specified current strength. The electrical equipment of the unit must be checked regularly. Any
defects that are found, such as loose connections and scorched cables, must be rectified immediately. The protective meas-
ures must be tested (e.g. grounding resistance) after performing any electrical work or repairs.
Requirements of the installation site
The air humidification unit may only be installed in spaces with existing water drainage. Furthermore, safety measures must be
provided in the space that automatically shut o the water supply to the air humidification unit securely in the event of a leak. The air
humidification unit is an IP20 protection class design.

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5. Transport and storage
To prevent potential damage during transport due to external applied forces, the humidification unit must be handled with care. If
transported manually, ensure that necessary human lifting and carrying forces are reasonable.
The unit may not be transported using the connection cable. Avoid blows and impacts.
5.1 Dimensions and weight
LBE 250AO
Dimensions of the packaged unit (W x H x D) 800 x 460 x 420 mm
Weight of the packaged unit without optional accessories approx. 28 kg
5.2 Packaging
The safety labels on the box must be observed. Pay attention to and check for any damage to the packaging or to the unit upon deliv-
ery. Complaints or damage must be reported immediately.
5.3 Storage
The unit must be stored in its packaging in a dry, dust-free space protected from frost.
5.4 Check for completeness
Make sure that when the unit is delivered:
• The type and serial number on the nameplate correspond to those on the order and delivery documents.
• The equipment (including any optional accessories) is complete.
• All parts are in perfect condition.
Note: Any transport damage and/or missing parts must be reported immediately in writing to the forwarder or supplier.
5.5 Scope of delivery
The delivery includes:
• The air humidification unit
• Operating and installation manual
• Accessories: Water connection set (see chapter 12.6)
Dispose of the packaging material and protective packaging in an environmentally-friendly manner and in accordance with local
regulations e.g. recycling of wooden pallets or cardboard packages.
Equipment that is no longer functional must be disassembled by a specialised firm and properly disposed of at a suitable
facility. The waste electrical and electronic equipment ordinance (EAG-VO) applies. This ordinance provides for the imple-
mentation of community law, Directive 2002/95/EC (RoHS) and Directive 2002/96/EC (the WEEE directive).
5.6 Disposal

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Seitenansicht von Links
Wartungsansicht von Vorne
Ansicht von Vorne
2
3211814
11
12
1 Abluft
2 Wasser-Ablauf
3 Osmose-Ablauf
4 Wassereinlassventil
5 Netzstecker
6 Zuluft
7 Bedienteil
8 Wartungsdeckel
9 Wartungsdeckel Wasserwanne
10 Rotationslamellenverdunster
11 Schwimmerschalter
12 Antriebsmotor
13 Wasserzulauf
14 UVC-Röhre zur Desinfektion
15 Wartungsdeckel UVC-Röhre
16 Frontklappe
17 Wasserwanne
18 Umkehrosmoseeinheit
19 Regelungselektronik
20 Ablaufpumpe
21 Wasser
17
4
10
19
13
7
16
1
2,3
5
7
8
9
1
2,3
14
15
16
17 18 19
4
4
12
10
5
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13
16
8
8
9
9
6
20
20
Seitenansicht von Links
Wartungsansicht von Vorne
Ansicht von Vorne
2
3211814
11
12
1 Abluft
2 Wasser-Ablauf
3 Osmose-Ablauf
4 Wassereinlassventil
5 Netzstecker
6 Zuluft
7 Bedienteil
8 Wartungsdeckel
9 Wartungsdeckel Wasserwanne
10 Rotationslamellenverdunster
11 Schwimmerschalter
12 Antriebsmotor
13 Wasserzulauf
14 UVC-Röhre zur Desinfektion
15 Wartungsdeckel UVC-Röhre
16 Frontklappe
17 Wasserwanne
18 Umkehrosmoseeinheit
19 Regelungselektronik
20 Ablaufpumpe
21 Wasser
17
4
10
19
13
7
16
1
2,3
5
7
8
9
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2,3
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15
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17 18 19
4
4
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10
5
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13
16
8
8
9
9
6
20
20
1 Air discharge
2 Water drain
3 Osmosis drain
4 Water inlet valve
5 Mains power plug
6 Air intake
7 Control panel
8 Maintenance cover
9 Maintenance cover - water tray
10 Rotating blade evaporator
11 Float switch
12 Drive motor
13 Water inlet
14 UVC tube for sterilisation
15 Maintenance cover - UVC tube
16 Front flap
17 Water tray
18 Reverse osmosis unit
19 Control electronics
20 Drainage pump
21 Water
6. Device structure
20
View from the front
Maintenance view from the front
Side view from the left
191817
16
15 14
4
2,3
13
1
12
11
10
9
8
5
5
67
1
2,3
4
8
9
8
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2
3 14 20 18 21 17
16
4
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16
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19
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12

OPERATING AND INSTALLATION MANUAL LBE 250AO PAGE 11
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7. Versions
Versions Air intake - left Air intake - right
Item no. 08LBE250ALO 08LBE250ARO
The air humidification unit is operated in conjunction with the PKOM4heat pump combi-unit. It is installed directly downstream of the
unit in the supply air duct.
The air humidification unit works on the principle of natural evaporation. When it enters the air humidification unit, the supply air
flows over specially coated rotor blades, that are wetted with water. This water is absorbed into the air via evaporation (adiabatic
humidification) and the absolute humidity of the air increases. The evaporation process simultaneously causes the air temperature to
drop; the relative humidity of the air increases.
The unit may not be used for cooling purposes. The temperature control is regulated by the PKOM4heat pump combi-unit by means
of a duct heater installed downstream of the humidification unit. The adjustable absolute humidity is between 4.5 and 11.5g/m³.
Humidification output is selected using four preset levels. Whether these target values are actually reached is always dependent on
the circumstances under which the air enters the air humidification unit.
The unit operates automatically, and the air humidity in the unit is monitored electronically. This prevents any over-humidification of
the supply air.
The LBE250AO humidification unit is dimensioned for a maximum operating air volume flow of 350m³/h.
Note:
The air humidification unit may not be operated with higher air volume flows than given in this operating manual. If the
maximum operating volume flow is exceeded, individual drops of water may we carried along at the outlet of the air humidi-
fication unit. This can allow water to enter the supply air duct!
The humidifier tray is fed with drinking water from the central water supply. In order to minimise deposits on the rotating blades and
in the water tray during operation, the air humidification unit is fitted with a reverse osmosis unit as standard. The reverse osmosis
unit is installed in the water inlet pipe between the solenoid valve and the water tray. A pre-filter unit in the form of a water filter,
which must be installed (externally) in the water inlet pipe during installation, is included in the scope of supply.
Depending on evaporation performance, there may be a maximum of 2.5litres of water in the humidifier tray. Evaporated water is
replaced with fresh water on an ongoing basis. In addition, the water is completely renewed once a day for hygiene reasons. The max-
imum water fill level is limited using a float switch. Any overflow from the tray is also prevented by means of a safety overflow.
In humidification mode, the water in the tray is continuously irradiated with UVC light and disinfected. The UVC tube completely illu-
minates the water tray and the evaporation surfaces. For safety reasons, the UVC tube is operated with a ballast unit with integrated
error detection. If the UVC tube fails or has reached its maximum operating time, the water in the LBE250A/LBE500A is pumped out
and an error message is issued.
8. Functional description
8.1 Working principle

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8.2 Reverse osmosis
The water pressure in the drinking water pipe enables the operation of the reverse osmosis unit. The raw water (drinking water) is
pushed through a semipermeable osmosis membrane. The clean water passes through this membrane (but it cannot pass back) and
then into the humidifier tray. The residual water with all of the substances dissolved in the water (e.g. nitrates, nitrites, germs, lime,
etc.) flow into the drain. Residual water is always drained away during the filling process.
The water in the humidifier tray is disinfected using UVC radiation, killing germs and bacteria and preventing their growth. The
advantage of UVC disinfection is that it is not a chemical process, and is harmless to health (it cannot produce ozone!). The irradiation
occurs only in an enclosed space with a radiation output of 4.3watts at a wavelength of 253.7nm.
During maintenance and repair work, never look at the UVC light source without protection when it is switched on!
Only operate the UVC tube in a closed, undamaged housing.
8.3 UVC disinfection
8.6 Active air humidification / regular operation
During active air humidification, humidity and temperature are controlled at the same time:
8.6.1 HUMIDITY CONTROL
Air humidity is controlled by means of the water level in the humidifier tray and thus via the water-wetted part of the rotor blade
surfaces. When the water level rises, the blades of the rotor are immersed deeper in the water, thereby increasing the surfaces of the
rotor blades which are wetted with water. The air flowing over these absorbs humidity from the wet blade surfaces by evaporation.
8.6.2 EVAPORATION PERFORMANCE
Evaporation performance is always dependent on the air intake conditions. Very dry and warm air can absorb more humidity than
already saturated or cold air. The maximum possible evaporation in typical winter weather conditions is around 7g/m³. This means,
for example, that dry air with an inlet state of 18°C can be brought to an outlet state of 25°C with 60% RH.
This corresponds to a maximum possible evaporation capacity for the LBE250AO of around 1.8l/h.
8.7 Controlled shutdown / switch-o sequence
A controlled shutdown is initiated by the control system if for example an error message is detected, the air humidification unit
switches from Operating mode to Standby mode or the unit is switched o. At this point, the water in the humidifier tray is first of
all completely pumped out, and the rotor blades continue to rotate for approximately 20minutes. The UVC tube remains in operation
during the stopping time.
8.8 Daily water change
The water in the humidifier tray is completely replaced every 24hours for hygiene reasons. The operator is free to set the time for
this (the default setting is 3pm) and can set this in the "Settings” menu item.
8.4 Standby mode
The air humidification unit is in Standby mode. If the set absolute air humidity is undercut by more than 2g/m³, the air humidification
unit is switched on, provided that release has been approved.
8.5 Start phase for active air humidification / switch-on sequence
The drainage pump first switches on to completely pump out any water that may still be in the humidifier tray. Fresh water is then
simultaneously let into the humidifier tray, the UVC tube is switched on and the rotor is activated.

OPERATING AND INSTALLATION MANUAL LBE 250AO PAGE 13
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9. Regulation and control
The unit is delivered pre-programmed. Once installation is complete and all air, water and electrical connections have been set up
(see chapter12), information on water hardness must be entered (see commissioning), after which the unit is ready for use.
9.1 Control unit (display) / basic settings
The LBE 250AO air humidification unit comes with a 4.3" touchscreen display. Operation using the touchscreen display is simple and
intuitive.
Tap briefly on the display to interrupt the idle state; the main screen is displayed.
Pressing again on the display screen for around five seconds opens a sub-menu where basic settings can be set. In the sub-menu,
you can choose from dierent languages, display brightness levels and display timeout times (=time after which the display switches
back to the idle state due to inactivity) for operation.

OPERATING AND INSTALLATION MANUAL LBE 250AO PAGE 14
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9.2 Main screen (Home)
The main screen (Home) displays all important operating information at a glance.
Air humidification "O" The air humidification unit is locked manually and can be unlocked by
pressing this button.
Air humidification "Standby"
The air humidification unit is in Standby mode. If the set relative air
humidity is undercut by more than 5%, the air humidification unit is
switched on, provided that release has been approved.
Air humidification "On"
The air humidification unit is in Operating mode, meaning that the unit has
been released, and there is a control deviation. The air humidification unit
adjusts the air humidity and the air temperature according to the set
values. If the measured air humidity is within approx. 2% of the set air
humidity and the water valve only opens sporadically within a 12-hour
period, the air humidification unit switches to Standby mode.
Air humidification released
External: digital input or Modbus
Internal: volume flow Depending on the configuration, a unit can be released either solely via
airflow detection or additionally via a digital release contact or release via
Modbus.
Air humidification not released
External: digital input not closed or Modbus
release disabled
Internal: no volume flow detected
Airflow present The flow sensor integrated at the outlet of the air humidification unit
automatically detects any present air volume flow. This is always a
precondition for unit release.
No airflow present
Message active This message is displayed when there are faults or warnings. Tapping on
the icon will take you to the main message screen.
Display of the set humidification level. Tapping will take you to the settings,
where you can set the target humidity by selecting any of four humidifica-
tion levels.
1 - Minimum humidification (~ 4.5 - 6.0 g/m³)
2 - Moderate humidification (~ 6.0 - 7.5 g/m³)
3 - High humidification (~ 7.5 - 9.0 g/m³)
4 - Maximum humidification (~ 9.0 - 11.5 g/m³)
Meaning of the icons

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The blue arrow indicates a flow of air through the air humidification unit.
Display of the current measured absolute air humidity at the outlet of the
air humidification unit.
25/06/2021 10:14
Date / time: Can be modified simply by tapping.
Summer time can be enabled/disabled.
In the event of any extended interruption in the power supply, the Settings
should be checked and updated if necessary.
Water valve on
Water valve o
Displays the current status of the water valve. In Humidification mode, the
humidifier tray is continuously filled with fresh drinking water.
Drainage pump on
Drainage pump o
Displays the current status of the drainage pump. This is active in every
start sequence, switch-o sequence, switch to Standby mode as well as in
Humidification mode, if the water level in the humidifier tray is too high.
UVC tube on
UVC tube o
Displays the current status of the UVC tube. This is always switched on
when air humidification is active and during the switch-o sequence.
Rotor running Displays the current operating state of the rotor. This is running in
Humidification mode and during the switch-o sequence.
Heater on Displays the current operating state of the heating battery. This is only
operational when humidification is active.

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9.3 Main menu
Pressing the button on the main screen takes you to the main menu of the control unit. You can then access the individual sub-
menu items.
9.4 Operating values and unit information
This menu item displays the relevant current operating values and unit information.
The values in brackets show the currently set target values.
Pressing the arrow key displays the operating times for the individual consumable and maintenance parts.
Note! Observing the maximum operating times is essential to ensuring the lengthy and trouble-free operation of your air
humidification unit. Replace the UVC tube, water filter and osmosis filter regularly and within the recommended time intervals.
9.4.1 MAXIMUM OPERATING TIMES
When the maximum recommended operating times are reached, the respective components must be replaced and the corresponding
operating hour counters must be reset.
Attention! Only use original replacement parts for repairs and replacements.
Settings
Service / maintenance
Messages
Operating values and
unit information
The button returns you to the main screen.

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9.4.2 UVC TUBE OPERATING TIME
Attention! The UVC tube has a guaranteed radiation performance of at least 85% over a period of 8000 operating hours.
Never reset the hour counter without inserting a new UVC tube! Reduced radiation performance can lead to insucient UVC
water sterilisation (see chapter8.3)
Instructions for replacing the UVC tube (see chapter16.1)
9.4.3 WATER FILTER OPERATING TIME
For operating safety and hygiene reasons, the water filter should be replaced once the maximum recommended operating time is
reached, and at the latest every 2years.
Instructions for replacing the water filter (see chapter16.3)

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9.4.4 OSMOSIS FILTER OPERATING TIME
Over time, the osmosis membrane becomes clogged with small particles that hinder the flow of clean water. For operating safety and
hygiene reasons, the osmosis filter should be replaced once the maximum recommended operating time is reached, and at the latest
every 2years.
The rotating blades and humidifier tray should also be cleaned when replacing the osmosis filter.
Maintenance instructions (see chapter16.2)
9.4.5 AIR HUMIDIFIER OPERATING TIME
The total time during which the air humidification unit has provided active humidification is counted in hours and displayed in days.
This time can be reset as required, if for example significant repair and maintenance is performed.

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9.5 Messages
The main message screen displays the status of the individual consumable and maintenance parts.
In trouble-free, regular operation, the status is marked OK.
9.5.1 FAULT MESSAGES
If the control system detects a fault, a red message is displayed and the air humidification unit performs a controlled shutdown (for
controlled shutdowns, see chapter8.7). This also applies when the maximum operating time of the UVC tube is reached.
To be able to return the air humidification unit to service, a fault must first be corrected and the error message must then be reset.
For detailed description of faults, see chapter14.
9.5.2 OPERATING TIME WARNING MESSAGE
If the water filter or osmosis filter reaches its maximum operating time, a red warning message is displayed and the component
must be replaced.
Before the maximum operating time is reached, a yellow warning message will be displayed indicating that the respective component
must be replaced "soon".
The air humidification unit will continue to operate in the event of these warning messages.

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9.6 Settings
In this menu item, the operator can set the most important settings for operating the air humidification system.
9.6.1 TARGET AIR HUMIDITY
The target humidity value can be selected from four humidification levels.
1 - Minimum humidification (~ 4.5 - 6.0 g/m³)
2 - Moderate humidification (~ 6.0 - 7.5 g/m³)
3 - High humidification (~ 7.5 - 9.0 g/m³)
4 - Maximum humidification (~ 9.0 - 11.5 g/m³)
The humidification that can actually be achieved is dependent on the state of the air at the inlet (see chapter8.6.2).
9.6.2 DAILY WATER CHANGE
The time for the daily water change (see chapter8.8) can be set here.
9.6.3 WATER HARDNESS
The water hardness can be input in this menu item. This primarily has an impact on the maximum operating time of the osmosis fil-
ter. The water hardness is determined using the test strips provided. This must be immersed in the drinking water for 2seconds, and
will give a test result after 1minute. Then, compare this with the scale shown on the display and set the corresponding value using
the arrow keys.