Pichler LBE 250A User manual

OPERATING AND
INSTALLATION INSTRUCTIONS
LBE 250A / LBE 500A
Air humidification unit size
"LBE 250A" / "LBE 500A"
Air
Conditioning Technology
 VDI 6022, sheet 1 (01/2018)
 SWKI VA104-01 (01/2019)
 ÖNORM H 6021 (08/2016)
 VDI 3803, sheet 1 (05/2020)
Hygiene conformity test
W-351037-21-JRoll
Validity period:
10/2021 – 10/2026
Systematic ventilation.
COMFORT
VENTILATION

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 2
USER 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 6
4. Safety Page 6
4.1 General information Page 6
4.2 Unit 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 supply Page 9
5.6 Disposal Page 9
User
6. Unit design Page 10
7. Model types Page 11
8. Functional description Page 12
8.1 Working principle Page 12
8.2 Reverse osmosis Page 12
8.3 UVC disinfection Page 12
8.4 Standby operation Page 13
8.5 Starting phase of the active air humidification / switch-on sequence Page 13
8.6 Active air humidification / regular operation Page 13
8.6.1 HUMIDITY CONTROL PAGE 13
8.6.2 EVAPORATION PERFORMANCE PAGE 13
8.6.3 TEMPERATURE CONTROL PAGE 13
8.7 Controlled switch-o / switch-o sequence Page 13
8.8 Daily water change Page 13
9. Closed-loop and open-loop control Page 14
9.1 Control unit (display) / basic settings Page 14
9.2 Main overview (home) Page 15
9.3 Main menu Page 16
9.4 Operating values and unit information Page 17
9.4.1 MAXIMUM OPERATING TIMES PAGE 17
9.4.2 OPERATING TIME OF THE UVC TUBE PAGE 18
9.4.3 OPERATING TIME OF THE WATER FILTER PAGE 18
9.4.4 OPERATING TIME OF THE OSMOSIS FILTER PAGE 19
9.4.5 OPERATING TIME OF THE AIR HUMIDIFIER PAGE 19

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 3
USER GENERALSPECIALIST PERSONNEL
9.5 Messages Page 20
9.5.1 FAULT MESSAGES PAGE 20
9.5.2 WARNING MESSAGE OPERATING TIMES PAGE 20
9.6 Settings Page 21
9.6.1 TARGET HUMIDITY PAGE 21
9.6.2 TARGET TEMPERATURE PAGE 21
9.6.3 DAILY WATER CHANGE PAGE 21
9.6.4 WATER HARDNESS PAGE 21
9.6.5 ENABLE PAGE 22
Specialist Personnel
9.7 Service / maintenance Page 23
9.8 Test mode Page 24
10. Technical specifications Page 25
10.1 Pressure loss characteristics Page 25
11. Layout sketches Page 26
11.1 Layout sketch for the LBE 250A (WALL INSTALLATION) Page 26
11.2 Layout sketch for the LBE 500A (WALL INSTALLATION) Page 27
12. Mounting Page 28
12.1 Prerequisites for the unit installation Page 28
12.2 Minimum clearances to be observed Page 28
12.3 Assembly of the air humidification unit Page 29
12.4 Air duct connections Page 30
12.5 Sewage connection Page 30
12.6 Drinking water connection Page 30
12.7 Connection of the water heater battery Page 31
12.8 Connection of the low-temperature heating Page 32
12.9 Removing the transport securing device Page 33
13. Electrical connection Page 34
13.1 LBE with electric heater battery (by the factory) Page 35
13.2 LBE with water heater battery (on site) Page 36
13.3 External connection (enable / Modbus) Page 36
13.3.1 MODBUS CONNECTION PAGE 37
14. Error messages and max. operating periods Page 38
15. FAQ Page 39
16. Maintenance (specialist) Page 40
16.1 UVC tube replacement Page 40
16.2 Maintenance of the reverse osmosis unit and rotor lamellae Page 41
16.3 Maintenance of the water filter Page 44
17. Accessories and spare parts Page 44
18. Firmware update Page 45
19. Hygiene certificate Page 45
20. EG-Konformitätserklärung / EC Declaration of Conformity Page 46

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 4
USER GENERALSPECIALIST PERSONNEL
1. Introduction
Dear customer
Dear customer,
Thank you for choosing the air humidification unit LBE 250A/LBE 500A.
The air humidification unit is available in the sizes LBE 250A and LBE 500A and complies with the latest state of the
art. It convinces by its operational reliability, ease of operation and eciency.
To operate your air humidification unit safely, properly and economically, please read this instruction carefully and follow the instruc-
tions provided.
Use the air humidification unit only when in perfect condition and for its designated use, be aware of safety and any hazards and
cognisant of all the notes and information contained in this instruction.
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 any further questions, please do not hesitate to contact us.
Please keep this operating instruction in a safe place and readily available at all times.
If you lose the documentation, please contact us.
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5
T [phone]
2. General
This chapter contains some general information about the air humidification unit LBE 250A/LBE 500A.
READ THIS INSTRUCTION CAREFULLY BEFORE COMMISSIONING THE UNIT!
This instruction contains notes and information regarding safe operation and proper installation of the air humidification unit LBE
250A/LBE 500A and regarding its use and servicing. Furthermore, reference this instruction during servicing to ensure proper execu-
tion of the tasks. Keep this operating instruction in a safe place and readily available.
Troubleshooting and procedures in the air humidification unit must only be performed by an installation company (specialist compa-
ny).
Changes reserved:
This instruction 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 instruction.
Our "General terms and conditions" in their latest version apply.
J.Pichler
Gesellschaft m.b.H.
AUSTRIA 9021
KLAGE NFURT
Kartweg 5 T +43 (0) 463
32769
wvw.pichlerluft.at
Unit type:
08LBE250ARE
Year of manufacture:
09/2021
Air volume flow:
Max. 350 m3/h
Dimensions L x D x H:
360 mm x 360 mm x 385 mm
Weight:
25 kg
Voltage / frequency:
230V / 50 Hz
Power consumption:
Max. 1450 W
Water inlet pressure:
0.35-0.7 bar
Serial number:
C21090010
www.pichlerluft.at

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 5
USER GENERALSPECIALIST PERSONNEL
3. Designated use
The air humidification unit LBE 250A/LBE 500A is suitable for the installation in or retrofitting of air conditioning and ventilation sys-
tems with a maximum air volume flow of 350 m³/h with the LBE 250A and 500A m³/h with the LBE 500A.
This unit is available to the general public and is intended for installation in residential or industrial buildings.
The compact air humidification unit works according to the natural evaporation principle and provides for constant and optimum
supply air humidity.
In addition, the supply air is kept at a constant temperature via an integrated air heater battery.
Designated use also includes adherence to our prescribed operating and installation instruction. Only qualified personnel may work
on and with the unit. Persons transporting or working on the unit must have read and understood the corresponding parts of the
operating instruction, especially Chapter 4 “Safety”.
The system operating company must also be instructed on potential hazards by the system builder.
The air humidification unit LBE 250A/LBE 500A is not a ready-to-use product. It must not be put into operation until it has been prop-
erly installed and connected to the air conditioning and ventilation system.
The humidification unit is not suitable for outdoor installation. It may only be installed in suitable and tempered interior 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 250A/LBE 500A is a compact, automatic air treatment unit for the active humidification and heating of the supply air in air
conditioning and ventilation systems.
Any other use shall be deemed improper and may result in personal injury or damage to the air humidification unit LBE 250A/LBE
500A, for which the manufacturer cannot be held liable.
The manufacturer accepts no responsibility for any damage due to:
• non-compliance with the safety, operating and servicing instructions given in this operating and nstallation instruction.
• 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.

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 6
USER GENERALSPECIALIST PERSONNEL
3.2 Warranty
The warranty period shall commence after the unit is put into operation, but no later than one month after 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 air humidification unit LBE 250A/LBE 500A must not be dismantled without prior written authorisation from the
manufacturer. The manufacturer's liability shall be limited to spare parts installed by a specialist 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 unit.
The warranty is voided automatically by failure to comply with the information in this installation and operating instruction.
4. Safety
Read this operating and installation instruction carefully and observe the safety instructions while you carry out installation,
commissioning, servicing or general work on the ventilation unit. Keep the operating and installation instruction near the
unit for its entire service life.
Always observe the safety regulations, warnings, notes and instructions given in this instruction. The specifications given in this docu-
ment must not be altered. Non-observance of 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 IN THIS DOCUMENT
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 instruction, 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 humidifica-
tion unit may only be used in accordance with the information provided in Chapter 3. Designated 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.
Damage that is caused by non-compliance with the operating and servicing instructions 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 the unit has been put into operation, the power supply and water supply must not be interrupted for longer than one day, so that
the hygienic requirements can be met.
4.1 General information

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 7
USER GENERALSPECIALIST PERSONNEL
Switching o the ventilation unit
If the ventilation unit is shut down for longer than one day, the air humidification unit must be switched o at least two
hours before. In this way, the air humidification unit is dried out, and hygienically flawless functioning is ensured.
Working on the unit
Installation, commissioning, service and repairs must be carried out by an authorised specialist (specialised heating compa-
ny/installation company). When working on the unit, it must be de-energised to zero potential and protected against restart.
The water supply must be interrupted.
UVC disinfection tube
A UVC tube is an integrated standard part of the unit! It must only be replaced by an originally packaged type as specified on
the unit. The UVC tube must only be changed by authorised qualified personnel! Before opening the unit or prior to replacing
the UVC it is absolutely required to switch the unit to a de-energised state and to disconnect the mains plug. Never look into
the illuminated UVC light source without eye protection.
4.2 Unit 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 shall 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 installation and may only be set up on a suitable, load-bearing construction. The unit must not be ex-
posed to vibration of any kind.
Air ducts of the ventilation system that are not installed in heated areas must be designed with suitable thermal insulation (risk of
temperature drop below the dew point temperature) in order to prevent condensation.
Components such as windows with poor thermal insulation properties or faulty construction as well as old buildings may show con-
densation in the living space, e.g. on the window glass, when outdoor temperatures are cold and the room air humidity is increased.
The surface temperature of the components must be above the dew point temperature of the room air (at least approx. +15 °C).
In normal operation, mould cannot form in the unit, since the humidifier water is continuously treated and sterilised during operation.

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 8
USER GENERALSPECIALIST PERSONNEL
Mounting
The unit is intended for horizontal mounting. It must be mounted on a massive, load-bearing wall with a maximum permissible
deviation of +/- 1° from the horizontal position. The net operating weight of the humidification unit must be taken into consideration
for the suspension. It must be restored immediately to prevent hazards. These worksteps must only be performed by authorised
qualified professionals.
Water connections
The water, heating and sewage connections must be established by specialist personnel. For connection to the water supply, only the
original connection tubes supplied may be used. Ensure that the pipes are tight. The maximum water pressure of the drinking water
connection of 0.7 MPa and the water heater battery of 1 MPa must not be exceeded. The installation of a water stop valve is mandatory.
Water quality
Only drinking water complying with the Drinking Water Ordinance may be used for the water supply. The connection to the drinking
water pipeline is to be established using the connection set supplied. With a chlorine content of more than 0.1 mg/l, the standard wa-
ter filter (5 μm) must be replaced by a dual filter (5 μm / carbon). If the iron content of the drinking water exceeds a value of 0.1 mg/l,
an additional iron filter must be mounted in the water supply line.
The unit can be utilised for a maximum water hardness up to 26 °dH (German hardness). When this value is exceeded, the durability
of the osmosis membrane is significantly reduced.
Operation of the unit
Any work practices that could potentially impair the safety of the unit are prohibited. All warning and protective devices must be
checked for proper functioning at regular intervals. Safety devices must not be dismounted or deactivated.
Mounting, dismounting, maintenance and repair of the unit
If maintenance work or repairs are carried out, the unit must be switched to a de-energised, zero-potential state. No additional equip-
ment must be added on or installed. In this case, consult the manufacturer.
Electrical / electronic systems
Work on electrical system parts may only be carried out by persons trained in electrical engineering. If maintenance work or
repairs are carried out, the unit must be switched to a de-energised, zero-potential state. If faults occur in the electric power
supply, switch o the unit immediately. Only use original fuses with the specified amperage. The electrical equipment of the unit must
be checked at regular intervals. Identified defects such as loose connections or scorched wires must be removed immediately. After
carrying out electrical work or repairs, the protective measures must be tested (e.g. earthing resistor).
Requirements with regard to the place of installation
The air humidification unit may only be installed in rooms where a water drain is available. Furthermore, safety precautions must be
provided for in the room, safely and automatically shutting o the water supply to the air humidification unit in the event of a leakage
(water stop valve). The air humidification unit is designed with the IP20 degree of protection.

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 9
USER GENERALSPECIALIST PERSONNEL
5. Transport and storage
In order to prevent possible damage brought about by undue force during transport, the humidification unit must be handled with
care. If transported manually, ensure that necessary human lifting and carrying forces are reasonable.
The unit must not be transported by the connection cable. Avoid knocks and blows.
5.1 Dimensions and weight
LBE 250A LBE 500A
Dimensions of the packaging unit (W x H x D) 800 x 460 x 420 mm 870 x 600 x 600 mm
Weight of the packaging unit without optional accessories approx. 28 kg approx. 62 kg
5.2 Packaging
The safety markings on the carton must be observed. Upon delivery, check the packaging and unit for possible signs of damage.
Complaints or damage must be reported immediately.
5.3 Storage
The unit must be stored in its packaging in a dry, dust-free environment and protected from frost.
5.4 Check for completeness
Make sure that the following conditions are met when the unit is delivered:
• The type number and serial number on the nameplate must comply with the details on the order and delivery documents.
• The equipment (possible optional accessories) must be complete.
• All parts must be in good order and condition.
Note: Any transport damage and/or missing parts must be reported immediately in writing to the forwarder or supplier.
5.5 Scope of supply
The scope of supply includes:
• the air humidification unit
• an operating and installation instruction
• Accessories: Water connection set (see Chapter 12.6)
• Optional accessories: for hot water heater battery (see Chapter 16)
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 (WEEE), which provides for ratification of community law,
directive 202/95/EC (RoHS) and the directive 2002/96/EC (the WEEE directive) apply.
5.6 Disposal

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 10
USER GENERALSPECIALIST PERSONNEL
1 Air outlet
2 Water outlet
3 Osmosis outlet
4 Water inlet valve
5 Mains plug
6 Heater battery water connection
7 Air inlet
8 Control panel
9 Maintenance cover
10 Water tank maintenance cover
11 Rotation lamella evaporator
12 Float switch
13 Drive motor
14 Water inlet
15 UVC tube for disinfection
16 UVC tube maintenance cover
17 Front lid
18 Water tank
19 Reverse osmosis unit
20 Control electronics
21 Drain pump
22 Heater battery
23 Water
6. Unit design
Seitenansicht von Links
Wartungsansicht von Vorne
Ansicht von Vorne
2
3 2321 1915
12
13
1 Abluft
2 Wasser-Ablauf
3 Osmose-Ablauf
4 Wassereinlassventil
5 Netzstecker
6 Wasseranschluss Heizregister
7 Zuluft
8 Bedienteil
9 Wartungsdeckel
10 Wartungsdeckel Wasserwanne
11 Rotationslamellenverdunster
12 Schwimmerschalter
13 Antriebsmotor
14 Wasserzulauf
15 UVC-Röhre zur Desinfektion
16 Wartungsdeckel UVC-Röhre
17 Frontklappe
18 Wasserwanne
19 Umkehrosmoseeinheit
20 Regelungselektronik
21 Ablaufpumpe
22 Heizregister
23 Wasser
18
4
11
20
14
8
17
1
2,3
5
87
6
9
10
1
2,3
15
16
17
18 19 20 21
4
4
22
13
11
5
6
7
12
14
17
9
9
10
10
1
2.3
4
5
6
7
8
17
18 19 20 21
5
6
7
22
9
10
11
12
13
1
14
2.3
15
16
4
View from the front
Maintenance view
Seitenansicht von Links
Wartungsansicht von Vorne
Ansicht von Vorne
2
3 2321 1915
12
13
1 Abluft
2 Wasser-Ablauf
3 Osmose-Ablauf
4 Wassereinlassventil
5 Netzstecker
6 Wasseranschluss Heizregister
7 Zuluft
8 Bedienteil
9 Wartungsdeckel
10 Wartungsdeckel Wasserwanne
11 Rotationslamellenverdunster
12 Schwimmerschalter
13 Antriebsmotor
14 Wasserzulauf
15 UVC-Röhre zur Desinfektion
16 Wartungsdeckel UVC-Röhre
17 Frontklappe
18 Wasserwanne
19 Umkehrosmoseeinheit
20 Regelungselektronik
21 Ablaufpumpe
22 Heizregister
23 Wasser
18
4
11
20
14
8
17
1
2,3
5
87
6
9
10
1
2,3
15
16
17
18 19 20 21
4
4
22
13
11
5
6
7
12
14
17
9
9
10
10
9
10
9
10
2
3 15 21 19 23 18
17
4
11
17
8
20
14
12
13
Side view from the left

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 11
USER GENERALSPECIALIST PERSONNEL
7. Model versions
Model versions Left-hand air inlet Right-hand air inlet
Art. No. with PTC electric heater battery LBE250ALE LBE250ARE
Art. No. with hot water heater battery LBE250ALW LBE250ARW
Art. No. with PTC electric heater battery LBE500ALE LBE500ARE
Art. No. with hot water heater battery LBE500ALW LBE500ARW

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 12
USER GENERALSPECIALIST PERSONNEL
8. Functional description
8.1 Working principle
The air humidification unit is operated in connection with an air conditioning and ventilation system. The installation is carried out
directly downstream of the living space ventilation unit in the supply air duct.
The air humidification unit works according to the principle of natural evaporation. When entering the air humidification unit, the sup-
ply air flows through a heater battery first. If required, it is heated first, however, the absolute humidity of the air remains constant.
Then the air flows via specially coated rotor blades that are wetted with water. This water is absorbed by the air by evaporation (adia-
batic humidification) and the absolute air humidity increases. At the same time, the evaporation process causes a decrease in the air
temperature; the relative air humidity increases.
The air humidification unit is not suitable for heating the supply air, the heater battery mainly serves to supply energy for the evapo-
ration process. Neither can the unit be used for purposes of cooling. Temperature regulation is subordinate to air humidity regulation.
The adjustable air temperature at the outlet of the air humidification unit is between 15°C and 25°C. The adjustable relative air
humidity is between 40% and 60%. Whether these target values are actually achieved always also depends on the condition of the
air when it enters the air humidification unit.
The unit works automatically, the humidity in the unit is monitored electronically. Excess humidity of the supply air is therefore ruled
out.
The LBE 250A air humidification unit is dimensioned for a maximum operating air volume flow of 350 m³/h, the LBE 500A for a maxi-
mum operating air volume flow of 500 m³/h.
Note:
The air humidification unit must not be operated with a higher air volume flow as the one specified in this operating instruc-
tion. If the maximum operating volume flow is exceeded, individual water drops can be carried along at the outlet of the air
humidification unit. In this way, water may enter the supply air duct!
The humidifier tank is supplied with drinking water from the central water supply. In order to minimise deposits on the rotation
lamellae and in the water tank during operation, the air humidification unit comes with a standard reverse osmosis unit. The reverse
osmosis unit is integrated into the water supply line between the solenoid valve and the water tank. A pre-filter unit in the form of a
water filter, which is to be integrated (externally) into the water supply line in the framework of the installation process, is included in
the scope of supply.
Depending on the evaporation performance, the humidifier tank contains a maximum of 2.5 litres of water (LBE 250A) and a maxi-
mum of 6 litres of water (LBE 500A). Evaporated water is replaced permanently by fresh water. In addition, the water is completely
replaced on a daily basis for hygienic reasons. The maximum water level is limited by means of a float switch. Overflowing of the tank
is additionally prevented by an overflow drain.
During humidification operation, the water in the tank is continuously irradiated and disinfected with UVC light, the UVC tube com-
pletely illuminating the water tank and evaporation surfaces. For reasons of safety, the UVC tube is actuated with a ballast with an
integrated error detection function. If the UVC tube is defective or the maximum operating hours of the UVC tube have been reached,
the water in the LBE 250A/LBE 500A is drained and a fault message is output.
8.2 Reverse osmosis
The water pressure in the drinking water pipeline allows for the operation of the reverse osmosis unit. In this process, the untreated
water (drinking water) is pressed through a semi-permeable osmosis membrane. The pure water passes through this membrane
(however, not back again) and afterwards into the humidifier tank. The residual water with all the substances dissolved in the water
(e.g. nitrate, nitrite, germs, lime, …) is led to the drain. While the filling process is taking place, residual water is also always drained at
the same time.
The water in the humidifier tank is disinfected by means of UVC radiation, killing germs and bacteria and preventing their growth.
The UVC disinfection oers the advantage of being a non-chemical treatment type that does not pose any hazard to health (no ozone
production possible!). Irradiation exclusively takes place in a closed area with a radiation performance of 4.3 watts at a wavelength of
253.7 nm.
When carrying out maintenance and repair work, never look into the illuminated UVC tube without eye protection!
Only operate the UVC tube in a closed housing that is not damaged.
8.3 UVC disinfection

OPERATING AND INSTALLATION INSTRUCTIONS LBE 250A / LBE 500A PAGE 13
USER GENERALSPECIALIST PERSONNEL
8.4 Standby operation
The air humidification unit is in the Standby mode. If the relative humidity set is lower by more than 5%, the air humidification unit
switches on, if it is enabled.
8.5 Starting phase of the active air humidification / switch-on sequence
The drain pump switches on first so as to completely drain potential residual water from the humidifier tank. At the same time, fresh
water is then filled into the humidifier tank, the UVC tube is switched on, and the rotor is activated.
8.6 Active air humidification / regular operation
During the active air humidification process, humidity and temperature control take place at the same time:
8.6.1 HUMIDITY CONTROL
The air humidity is regulated via the water level in the humidifier tank and therefore via the part of the rotor lamella surface that is
wetted with water. When the water level increases, the lamellae of the rotor immerse deeper into the water, thus enlarging the wa-
ter-wetted surface on the rotor lamellae. The air flowing over it absorbs moisture via evaporation on the wet lamella surfaces.
8.6.2 EVAPORATION PERFORMANCE
The evaporation performance always depends on the air inlet conditions. Very dry and warm air can absorb more moisture than air
that is already saturated or cold. The maximum possible evaporation with typical winter conditions is approximately 7 g/m³. In this
way it is possible to, for instance, bring dry air with an inlet condition of 18°C to an outlet condition of 25°C with 60% RH.
This approximately corresponds to a maximum possible evaporation of 1.8 l/h (with 250 m³/h) for the LBE 250A, and 3.6 m³ l/h (with
500m³/h) for the LBE 500 A.
Note: These data may always show slight deviations in practical applications.
In the case of air inlet temperatures above 25°C, a max. humidification to 60% RH cannot be ensured!
8.6.3 TEMPERATURE CONTROL
The air outlet temperature of the humidification unit is measured via the temperature sensor integrated into the unit.
Depending on the unit type, the air at the inlet to the humidification unit is heated via an electric PTC heater battery (unit type “E”) or a
hot water heater battery (unit type “W”).
Note: In the case of hot water heater batteries, the minimum flow temperature must be observed – see Chapter 10. Technical
data.
8.7 Controlled switch-o / switch-o sequence
Controlled switch-o is initiated by the regulation system, for example when, due to the detection of a fault message, the air humidifi-
cation unit changes from the operating status to the standby mode, or when the unit is switched o. In this process, first the water in
the humidifier tank is completely drained, while the rotor lamellae continue rotating for approx. 20 minutes. The UVC tube remains in
operation during the overtravel time.
8.8 Daily water change
For hygienic reasons, a complete water change takes place every 24 hours in the humidifier tank. The time for this can be individually
chosen by the operator (factory setting 3 pm) and is defined in the “Settings” menu item.

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9. Closed-loop and open-loop control
The unit is delivered with preprogrammed features. After having completed the assembly and after having established all air, water
and electrical connections (see Chapter 12), information on the water hardness must be entered (see commissioning), then the unit is
ready for operation.
9.1 Control unit (display) / basic settings
The LBE 250A/LBE 500A air humidification unit comes with a 4.3“ touch display. The unit oers easy and intuitive operation directly
on the screen.
By briefly touching the display, the standby mode is interrupted and the main overview is shown.
Touching the screen again for approximately five seconds allows for navigation to a submenu in which the basic settings can be car-
ried out. In the submenu, dierent languages, the display brightness and the display time-out period (=period after which the display
changes to the standby mode again when no action is carried out on the screen) for operation can be selected.

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9.2 Main overview (home)
In the main overview (home), all important operating information is represented at a glance.
50 % RH
22,0 °C 22,5 °C
50 % RH
25.06.2021 10:14
Air humidification “O” The air humidification unit is inhibited manually and can be enabled by
pressing this button.
Air humidification “Standby“
The air humidification unit is in the Standby mode. If the relative humidity
set is lower by more than 5%, the air humidification unit switches on, if it is
enabled.
Air humidification “On”
The LBE is in the operating mode, i.e. there is a unit enable and a system
deviation. The LBE carries out regulation to the air humidity set and the air
temperature set. If the measured air humidity is in a range of +/- 2% of the
air humidity set, and the water valve merely opens sporadically within 12
hours, the LBE changes to standby operation.
Air humidification enabled
Externally: Digital input or Modbus
Internally: Volume flow Depending on the configuration, a unit enable can either only be eected
via an airflow detection or additionally via a digital enabling contact or
enable via Modbus.
Air humidification not enabled
Externally: Digital input not closed or Modbus
enable inactive
Internally: Volume flow not detected
Airflow available The flow sensor integrated at the outlet of the LBE automatically detects a
present air volume flow. This is always a prerequisite for a unit enable.
Airflow not available
Message active This message is shown when faults or warnings are pending. Touching the
symbol will lead you to the message overview.
With this parameter, the desired air humidity at the LBE outlet with a
relative humidity between 40 % and 60 % is set.
A factory default value of 50 % RH is preset.
With this parameter, the desired air temperature at the LBE outlet is set
between 15 °C and 25 °C.
A factory default value of 21 °C is preset.
Meaning of the symbols

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The blue arrow indicates an airflow through the LBE.
Indication of the currently measured relative humidity and air temperature
at the outlet of the LBE.
25/06/2021 10:14
Date / time: Can be changed directly by touching the display.
Activation / deactivation of the summertime can be carried out.
When the power supply is interrupted for a longer period of time, the
settings must be checked and updated, if necessary.
Water valve On
Water valve O
Indicates the current status of the water valve. In the humidification mode,
the humidifier tank is continually filled with fresh drinking water.
Drain pump On
Drain pump O
Indicates the current status of the drain pump. It is active in each starting
sequence, switch-o sequence, change to the standby mode as well as
humidification mode, if the water level in the humidifier tank is too high.
UVC tube On
UVC tube O
Indicates the current status of the UVC tube. It is always switched on with
active air humidification and during the switch-o sequence.
Rotor rotating Indicates the current operating status of the rotor. It rotates in the humidifi-
cation mode and during the switch-o sequence.
Heating On Indicates the current operating status of the heater battery. It is only active
during active humidification.
9.3 Main menu
By pressing the button in the main overview, you reach the main menu of the control unit. From there, you can navigate to the
individual submenu items.
Settings
Service / maintenance
Messages
Operating values and
unit information
button leads back to the main overview.

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9.4 Operating values and unit information
In this menu item, the relevant current operating values and unit information are shown.
The values in brackets indicate the target values currently set.
By pressing the arrow button , the operating times of the individual wear and maintenance parts are shown.
Note! Observing the maximum operating times is vital for ensuring long-term and trouble-free operation of your air humid-
ification unit. Therefore, replace the UVC tube, the water filter and the osmosis filter at regular intervals and within the time
intervals recommended.
9.4.1 MAXIMUM OPERATING TIMES
When the maximally recommended operating times have elapsed, the respective components must be replaced and the correspond-
ing operating hours meters must be reset.
Please note! Only use original spare parts when carrying out repair and replacement work.

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9.4.2 OPERATING TIME OF THE UVC TUBE
Please note! The UVC tube has a guaranteed radiated power of at least 85% over a period of 8000 operating hours. Never
reset the hours meters without inserting a new UVC tube! A reduced radiated power can cause an insucient UVC water
disinfection (see Chapter 8.3)
Instructions for the UVC tube replacement (see Chapter 15.1)
9.4.3 OPERATING TIME OF THE WATER FILTER
For reasons of operational safety and for hygienic reasons, the water filter should be replaced when its maximally recommended
operating time is reached, however, once every 2 years at the latest.
Instructions for replacing the water filter (see Chapter 15.3)

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9.4.4 OPERATING TIME OF THE OSMOSIS FILTER
Over time, the osmosis membrane is blocked by small particles, impeding the passage of the pure water. For reasons of operational
safety and for hygienic reasons, the osmosis filters should therefore be replaced when its maximally recommended operating time is
reached, however, once every 2 years at the latest.
In the course of the osmosis filter replacement, the rotation lamellae and the humidifier tank should also be cleaned.
Maintenance instructions (see Chapter 15.2)
9.4.5 OPERATING TIME OF THE AIR HUMIDIFIER
The total time during which the air humidification unit has carried out active humidification is counted in hours and shown in days.
The time can be reset if required, for instance if more extensive repair and maintenance work is carried out.

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9.5 Messages
In the message overview, the status of the individual wear and maintenance parts is shown.
In fault-free regular operation, the status indicated is “OK”.
9.5.1 FAULT MESSAGES
If the control detects an error, a red message is output and the air humidification unit switches o in a controlled manner (Controlled
switch-o, see Chapter 8.7). The same applies for reaching the maximum operating time of the UVC tube.
In order to be able to recommission the air humidification unit, an error must first be eliminated, then the fault message must be
reset.
Detailed error description (see Chapter 14.)
9.5.2 WARNING MESSAGE OPERATING TIMES
When the maximum operating times of the water filter or osmosis filter are reached, a yellow warning message is output.
For the UVC tube, such a warning message is already output shortly before the maximum operating time is reached.
The air humidification unit, however, remains active when warning messages occur.