Pichler LG 350 User manual

Systematic Ventilation.
COMFORT
VENTILATION
For details – see the brochure
EU-Regulation
1253/2014
ErP
2018
2016 1254/2014
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OPERATING AND
INSTALLATION INSTRUCTIONS
COMPACT VENTILATION UNITS
LG 350 & LG 450

USER GENERALSPECIALIST PERSONNEL
OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 2
1. Introduction Page 4
2. General information Page 4
3. Function of the ventilation unit Page 5
4. Designated use Page 5
INTENDED USE PAGE 5
STIPULATIONS FOR OPERATION WITH FIREPLACES PAGE 6
STIPULATIONS FOR OPERATION WITH EXTRACTOR HOODS PAGE 6
LIABILITY PAGE 7
WARRANTY PAGE 7
5. Safety Page 8
SYMBOLS USED PAGE 8
SAFETY REGULATIONS PAGE 8
UNIT SET-UP PAGE 9
ELECTRICAL CONNECTION WORK PAGE 9
PLANT OPERATION PAGE 10
USER GUIDE
6. Customer service Page 11
7. Design of the ventilation unit Page 11
8. MINI control unit Page 12
FUNCTIONS PAGE 12
BUTTONS AND LEDS PAGE 12
CHANGING THE VENTILATION LEVEL PAGE 13
9. TOUCH control unit Page 13
START MENU PAGE 13
OPERATING MODE PAGE 14
VENTILATION LEVEL PAGE 14
DEMAND-DRIVEN AIR VOLUME CONTROL PAGE 16
TEMPERATURE PAGE 17
MAIN MENU PAGE 17
INFORMATION PAGE 18
SETTINGS PAGE 19
ACTIONS PAGE 22
10. Faults & messages Page 23
MINI CONTROL UNIT PAGE 23
TOUCH CONTROL UNIT PAGE 23
11. Filter maintenance Page 24
FILTER MESSAGE ON THE MINI CONTROL UNIT PAGE 24
CLEARING THE FILTER MESSAGE ON THE MINI CONTROL UNIT PAGE 24
FILTER MESSAGE ON THE TOUCH CONTROL UNIT PAGE 24
CLEARING THE FILTER MESSAGE ON THE TOUCH CONTROL UNIT PAGE 24
FILTER REPLACEMENT PAGE 25
Contents

USER GENERALSPECIALIST PERSONNEL
OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 3
MOUNTING / INSTALLATION
12. Scope of supply, transport, storage and disposal Page 26
SCOPE OF SUPPLY PAGE 26
TRANSPORT, STORAGE AND PACKAGING PAGE 26
DISPOSAL PAGE 26
13. Technical data Page 27
VERSIONS FOR FREE-STANDING AND WALL MOUNTING PAGE 27
TECHNICAL SPECIFICATIONS PAGE 27
SOUND DATA PAGE 28
CHARACTERISTIC CURVE – EXTERNAL PRESSURE INCREASE – AIR VOLUME FLOW PAGE 30
UNIT DESIGN PAGE 31
SAFETY DEVICES PAGE 33
14. System description and expansion options Page 33
FROST PROTECTION OPTIONS PAGE 33
SYSTEM EXTENSION FOR EXTERNAL SUPPLY AIR CONDITIONING PAGE 38
15. TOUCH control unit service level Page 42
TOUCH CONTROL UNIT TEST MODE PAGE 42
16. Installation Page 43
PREREQUISITES FOR UNIT SET-UP PAGE 43
OPENING THE UNIT PAGE 44
UNIT INSTALLATION PAGE 44
17. Electrical connection Page 48
18. Maintenance and cleaning Page 56
SAFETY INSTRUCTIONS PAGE 56
MAINTENANCE INSTRUCTIONS PAGE 56
COMMISSIONING PAGE 61
COMMISSIONING - SERVICE
19. Error description Page 62
TOUCH CONTROL UNIT PAGE 62
MINI CONTROL UNIT PAGE 62
20. Installation/operation of the service software and firmware updates Page 62
21. Spare parts and accessories Page 63
CONTROL ELEMENTS PAGE 63
SYSTEM COMPONENTS LG 350 PAGE 63
SYSTEM COMPONENTS LG 450 PAGE 63
AIR FILTERS PAGE 63
CONDENSATE SIPHON PAGE 63
22. Changes reserved Page 63
21. Product data sheets Page 64
PRODUCT DATA SHEET LG 350 PAGE 64
PRODUCT DATA SHEET LG 350 F PAGE 65
PRODUCT DATA SHEET LG 450 PAGE 66
PRODUCT DATA SHEET LG 450 F PAGE 67
22. EC Declaration of Conformity Page 68

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 4
USER GENERALSPECIALIST PERSONNEL
1. Introduction
The compact ventilation units LG350
and LG450 employ state-of-the-art
technology. They are characterised by cost
eectiveness, ease of use and reliability.
To operate your compact ventilation unit
safely, properly and economically, please
read this manual carefully and follow the
instructions provided.
Use the ventilation 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 manual.
Should you have any queries or wish to
order spare parts, please have the unit
mode and serial number (see nameplate
on unit) to hand.
Please contact us if you have any
further questions or if you lose your
documentation.
2. General information
J. Pichler
Gesellschaft m.b.H
AUSTRIA
9021 KLAGENFURT
Karlweg 5
T+43 (0) 463 32769
www.pichlerluft.at
Equipment type: Year of manufacture:
08LG350V XXX
Serial number: XXX Weight: 56 kg
Order number: XXX
Volume flow: max. 350 m³/h
Dimensions (WxHxD): 829x950x571 mm
Voltage/frequency: 230V / 50 Hz
Power consumption: max. 2050 W
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5
T+43 (0)463 32769
This chapter contains some general
information about the LG350 and LG450
compact ventilation units with the MINI or
TOUCH control unit.
BEFORE COMMISSIONING THE
UNIT, PLEASE READ THESE
INSTRUCTIONS CAREFULLY!
This manual contains notes and
information on safe operation and proper
installation of the LG350 and LG450
compact ventilation unit and on its use
and servicing. This manual furthermore
is to serve as a reference document for
servicing to ensure proper execution of
the tasks. Keep this operating manual in
a safe place and readily available at all
times.
Troubleshooting and procedures on
the compact ventilation 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 shall apply.

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 5
USER GENERALSPECIALIST PERSONNEL
3. Function of the ventilation system
With mechanically-controlled residential
ventilation, used, damp extract air is
conducted away from wet domestic areas,
e.g. bathroom, toilet and kitchen, and
is replaced with fresh, processed and
filtered outdoor air in lounge areas e.g. in
living rooms and bedrooms.
Significant energy savings are achieved
when the system is operated continuously
thanks to highly ecient heat exchangers
for heat recovery from extract air to the
supply air and the use of energy-ecient
fans with cutting-edge EC technology
for air flow control. This technology is
particularly eective in air-tight building
shells and with active thermal insulation.
Heat recovery with an eciency of over
90 % ensures highly ecient operation.
Protection of the heat exchanger by a
suitable closed-loop controlled frost
protection mechanism and the provision
of an eective condensate discharge are
of utmost importance in this respect.
The LG 350 and LG 450 compact
ventilation units are suited for the
installation into ventilation and air
conditioning systems for the controlled
mechanical deaeration and ventilation
of homes, large residential units and
oces and for similar purposes with
an adjustable air volume flow of up to
350m³/h (LG350) or 450m³/h (LG450).
The purpose of controlled mechanical
ventilation and deaeration of domestic
areas is to improve the air quality, to
reduce the heating energy demand by
the use of a highly ecient heat recovery
system, and to influence indoor air
humidity.
The unit’s fields of application and
designated use shall be limited
to ventilation and air conditioning
systems for the extraction of used air
and the supply of fresh, temperature-
controlled outdoor air at maximum
media temperatures between -15°C and
+35°C. Furthermore, the extracted air
must be free of aggressive vapours and
substances causing wear.
Any other use shall be deemed contrary
to designated use. The manufacturer shall
accept no responsibility for damages
or consequential damages arising from
improper use. Designated use also
includes adherence to our prescribed
operating and installation instructions.
This unit is available to the general
public and is intended for installation in
residential or industrial buildings. The
unit is used for mechanical aeration and
ventilation of indoor air and, combined
with heating or cooling systems, also for
auxiliary air heating or cooling.
This unit is not intended for use by
persons, including children, with limited
physical, sensory or mental capacities
or lacking experience and/or knowledge,
unless under supervision or instruction of
a person responsible for their safety.
The unit is not suitable for outdoor
installation and may be installed in
suitable and frost-free interior areas only.
The ventilation unit is not suitable for
drying new buildings.
In order to prevent the
uncontrolled formation
of condensate in the unit,
continuous operation with an extract air
temperature exceeding 25°C and an
extract air humidity of more than 50%
(e.g. private spa area) is to be avoided at
outdoor air temperatures of below 0°C.
4. Designated use
INTENDED USE

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 6
USER GENERALSPECIALIST PERSONNEL
STIPULATIONS FOR OPERATION WITH
FIREPLACES
STIPULATIONS FOR OPERATION WITH
EXTRACTOR HOODS
Local requirements in terms of standards,
laws and directives, must be taken into
account.
The central air conditioners
with heat recovery should not
be installed in comparably sized
rooms, apartments or facilities with room
air dependent heating apparatus unless:
• safety systems are in place to prevent
simultaneous operation of room air
dependent heating apparatus and units
extracting air, or
• special safety systems monitor waste
gas extraction of a heating appara-
tus dependent on room air. Heating
apparatus running on liquid or gaseous
fuels and drawing in room air, or air
conditioning systems, must switch o
should a safety system trigger. The air
conditioning system must switch o
should the safety system trigger in case
of solid fuel heating apparatus drawing
in room air.
Central air conditioning equipment for
controlled ventilation and extraction of air
in an apartment or similar facility shall
not be installed if the facility has room air
dependent heating apparatus connected
to waste gas units with multiple infeeds.
For normal operation of central air
conditioning systems, it must be possi-
ble to close any ducts for combustion
air or waste gas systems from heating
apparatus dependent on room air. Shuto
systems for waste gas from solid fuel
heating apparatus must be manual. The
position of the operating lever must
indicate the status of the shut-o device.
This is deemed complied with if a shut-o
system is used to block soot (soot shuto).
Fire protection requirements
The regional regulatory provisions, es-
pecially the fire protection regulations for
air conditioning of buildings, as amended,
must be taken into consideration when
installing the air conditioning system in
accordance with the instructions for fire
protection.
The compact ventilation unit is not a
ready-to-use product. It must not be put
into operation until it has been properly
installed and connected to a ventilation
system. Only qualified and instructed
personnel may work on and with the unit.
Personnel transporting,
installing or working on the unit
must have read and understood
the operating instructions, in particular
Section 5, “Safety”. The end user must
also be instructed on potential hazards.
Due to heavy load and irregular oper-
ation, the extract air from any kitchen
extractor hoods that may be present
must not be integrated into the dwelling’s
air-conditioning system. Extract air from
such extractor hoods must be conducted
separately to the outdoors by means of an
exhaust air pipe via the roof. The supply
air has to be provided separately (e.g. by
window ventilation).
If an extractor hood is operated without
separate introduction of supply air, air vol-
ume in the dwelling becomes unbalanced
and proper functioning of the domestic
air-conditioning system cannot be guar-
anteed (odour carryover etc.). Another
option is to operate the extractor hood in
recirculation mode.

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 7
USER GENERALSPECIALIST PERSONNEL
The LG 350 and LG 450 compact ven-
tilation units have been developed and
manufactured for controlled mechanical
ventilation and deaeration of spaces with
purposes similar, for example, to seminar
rooms and small oces.
For proper operation of the central air
conditioning systems, it must be possible
to close any ducts for combustion air and
flue gas systems of fireplaces drawing in
room air.
Any other use shall be deemed improper
and may cause personal injury or damage
to the compact ventilation unit, for which
the manufacturer cannot be held liable.
The manufacturer accepts no responsi-
bility for any damage due to:
• failure to observe the safety, operating
and maintenance instructions provided
in this operating and installation manual
• installation of spare parts that have
not been supplied by the manufacturer,
whereby the system's constructor/in-
staller shall be fully responsible for the
use of such spare parts
• normal wear and tear
LIABILITY
The warranty period shall commence
after the unit is put into operation, but
no later than one month after delivery.
The warranty covers replacement of
materials only, and excludes claims based
on services. The warranty shall be subject
to proof of services performed as per our
instructions and executed by a licensed
installer/specialised company.
Warranty claims are valid for a maximum
of 24 months following installation of the
compact ventilation unit but are limited to
30 months from the date of manufacture.
Warranty claims shall be limited to
material and/or constructional defects
occurring during the warranty period.
In the event of a warranty claim, the
LG350 and LG450 compact ventilation
units must not be dismantled without
prior written authorisation from the
manufacturer. 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 such as operation
without a filter, if parts other than original
manufacturer-supplied parts are installed,
or if unauthorised changes are made to
the unit.
The warranty is voided automatically by
failure to comply with the information
in these operating and installation
instructions.
WARRANTY

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 8
USER GENERALSPECIALIST PERSONNEL
5. Safety
Read these operating and installation
instructions carefully and observe the
notes on safety during installation,
commissioning and servicing or general
work on the ventilation unit. Keep the
Operating and Installation Instructions
near the unit for its entire service life.
Always observe the safety regulations,
warnings, indications and remarks
in these operating instructions. The
specifications given in this document
must not be altered. Failure to observe
these safety requirements, warning
notices, notes and instructions during
installation and maintenance works, as
well as commissioning, may result in
bodily injury or damage to the compact
ventilation unit.
The conclusion of a service contract is
recommended to ensure that the unit
will be inspected 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.
Attention/Note!
Attention! Ignoring this warning
may lead to injury or threat to
life and limb and/or damage to
the unit.
Attention – Hazardous electrical
voltage! Ignoring this warning
may lead to injury or threat to
life and limb.
Installation, initial start-up,
maintenance and repairs must
be carried out by an authorised
specialist company.
Over and above these operating and
installation instructions, 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 ventilation unit may
be used only in accordance with the
information provided in Section 4
“Designated Use”.
All safety and danger notices attached
to the unit and mentioned in these
instructions must be observed.
In the event of malfunctions, switch o
the unit immediately and disconnect the
power plug. The ventilation unit must be
properly 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 compact
ventilation unit is prohibited. Only original
spare parts may be used.
Modifications and alterations to the
ventilation unit are prohibited and absolve
the manufacturer from all warranties and
liability.
Ensure that children do not play with the
unit.
SAFETY REGULATIONS

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 9
USER GENERALSPECIALIST PERSONNEL
National and local regulations
must be observed during
installation and setup. The unit
must be installed in compliance with
national installation regulations.
Installation shall be carried out in
accordance with the general, locally
applicable 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 free-standing
installation or wall mounting and must
only be mounted on a suitable load-
bearing structure. The unit must not be
exposed to vibration of any kind.
The proper drainage of condensate
accumulating during operation of the
ventilation unit will be required, including
eective odour blocking traps (siphon).
The piping system for water, heating and
condensate connections must only be
installed by a specialist. The unit must be
installed and executed appropriately so
as to ensure seal-tightness and eective
condensate drainage in order to exclude
the possibility of building damage.
Eective condensate drainage must be
verified on-site prior to initial start-up and
after servicing the unit.
The maximum permissible load must be
observed when transporting the unit.
Components of the ventilation plant,
e.g. air ducts which may need to be
installed in unheated areas, must be
properly insulated to prevent heat loss or
condensate formation (for temperatures
under dew point). Observe all locally-
applicable construction and fire protection
guidelines, regulations and standards. If
necessary, appropriate suitable measures
must be taken when installing the unit,
e.g. the installation of fire dampers in air
ducts, etc.
UNIT SET-UP
Warning of hazardous electrical
voltage! Disregarding the hazard
may result in death, injuries, or
damage to material assets. Before car-
rying out any work on live parts, the unit
must always be disconnected completely
from the power supply (all poles) and
secured against being switched back on.
The earth contact plug and socket-outlet
on the power connection makes it possi-
ble to disconnect all poles of the unit from
the power supply.
Electrical connection work and
work on the system's electrical
components may be carried out
by authorised electricians only, in compli-
ance with national and local regulations.
Before opening the unit and
when carrying out work on the
unit, e.g. maintenance work and
repairs, etc., the unit must be deenergised
(disconnection of the voltage supply for
all poles) and must be protected against
restart for the duration of the work per-
formed.
The compact ventilation unit is designed
for a 230V/50 Hz voltage supply.
Work practices that could
compromise the unit’s safety are
prohibited! To ensure safe oper-
ation, safety devices must not be removed
or bypassed.
Electrical equipment and the unit's
warning and protective devices must be
inspected regularly to ensure that they
are in perfect working order. In the event
of faults in the electrical power supply or
the identification of defects, e.g. loose con-
nections or burnt cables, the unit must be
switched o immediately.
Damaged or faulty power supply cables to
the unit must be repaired immediately to
avoid hazards.
ELECTRICAL CONNECTION WORK

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 10
USER GENERALSPECIALIST PERSONNEL
Operation of the ventilation unit
is permitted only if all built-in
parts provided, e.g. silencers
etc., have been properly connected.
In the event of errors or any
damage that can cause harm to
persons or property, the system
must be put out of operation immediately.
Further use must be actively prevented
until the unit is fully repaired.
If error messages occur or any damage
is indicated, the ventilation unit must be
switched o and disconnected from the
power system immediately. Be aware of
your safety and of hazards when opening
the unit or when removing cover plates.
Work practices that could potentially
damage the unit are prohibited.
The unit may only be operated
with connected air ducts or
installed system components
such as acoustic dampeners to ensure
that fans or electrical components, for
instance, cannot be touched by hand.
The compact ventilation unit may be
operated only in accordance with the
project documentation, which shall
comply with the Equipment and Product
Safety Act and the pertinent provisions of
the EC Directives and Standards.
Consider environmental impacts and
refrain from installing the ventilation
unit in the vicinity of flammable liquids
or gases, in swimming pools or in areas
exposed to chemicals.
Never operate the ventilation unit without
an air filter. Air filters must be checked
regularly for dirt and damage and
replaced, if necessary. The air filters must
be changed at least every six months
or when the “Change Filter” message
appears on the control unit. Use original
replacement filters only. If the plant is
not used in summer, the air filters must,
for hygienic reasons, be replaced prior to
restarting.
When operating the ventilation unit
simultaneously with ambient air-
dependent fireplaces, the safety
regulations and standards must be
complied with. When using fireplaces
dependent on ambient air, the combustion
air supply must be provided separately.
See the provisions specified in Section
4, “Stipulations for operation with
fireplaces”.
Due to the heavy impact and inconsistent
operation, extractor hoods must in no
case be integrated into the exhaust duct
of the compact ventilation unit. See
the provisions specified in Section 4,
“Provisions in connection with extractor
hoods”. Exhaust air extractor hoods
must be operated via separate air pipes
with suitable air replenishment, e.g. by
means of window ventilation or in air
recirculation mode.
PLANT OPERATION
The unit may not be operated until safe
operational conditions are restored.
Fault finding and immediate remediation
of electrical defects and malfunctions
shall be carried out by authorised electri-
cians only. All protective measures must
be inspected (e.g. earth resistance etc.)
after completion of electrical work on the
unit. For details, see Section 17, “Electrical
Connection”.

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 11
USER GENERALSPECIALIST PERSONNEL
The LG 350 and LG 450 compact
ventilation units with PHI certificate
are used for the controlled mechanical
aeration and ventilation of homes, larger
residential houses, oces and similar
applications and are suited for free-
standing installation or wall mounting in
frost-free rooms.
Their range of use extends to residential
spaces from approx. 100m² to approx.
350m² with a standard room height,
in passive or low-energy houses, with
an adjustable air volume flow of up to
350m³/h (LG350) or 450m³/h (LG450).
Operation is simple and intuitive and, with
an Internet connection (LAN connection)
can also be carried out via the Pichler app.
The optional expansion options by the CO2
sensor module and the humidity sensor
allow for demand-driven ventilation
operation.
The LG350 and LG450 compact
ventilation units are provided with:
• a compact, thermal bridge-free and
thermally insulated EPP housing
• a device enclosure of galvanised sheet
steel, powder-coated in RAL9010 on the
outside
• a highly ecient heat recovery system
with an air-to-air counterflow heat
exchanger made of recyclable plastic
with an eciency of 93 % in the case of
LG350 and 90 % in the case of LG450
• optionally with additional moisture
recovery
• a 100 % automatic integrated bypass
to work around the heat exchanger, if
required
• selectable, automatically working frost
protection switch for the heat exchanger,
optionally available with an electrical
pre-heater battery
• energy-saving radial fans in state-of-
the-art EC motor technology
• an integrated volume flow
measurement, which guarantees
balanced operation on the supply and
extract air sides. Even if the system
pressure is changed, the air volume
flow is maintained, e.g. if the filter is
contaminated.
• outdoor air filter of quality class
ISOePM170 % and extract air of quality
class ISOCoarse80 %
• integrated filter monitoring – when
the time internal is reached, the “Filter
replacement” message is output on the
control unit
• filter replacement can be carried out
without tools
• an internally wired electronic controller
• as a standard feature, with the “MINI”
control unit for setting the basic
functions
• optionally with the comfortable “TOUCH”
control unit, with an integrated room
temperature sensor for enhanced
operation and display
• optional connection of a heater, cooling
or combination battery for the additional
conditioning of the supply air
6. Customer service
Please contact the installer of your
ventilation and air conditioning system
or contact us directly for any questions
relating to the LG350 or LG450 compact
ventilation unit supplied.
USER GUIDE
7. Design of the ventilation unit
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5
T+43 (0)463 32769

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 12
USER GENERALSPECIALIST PERSONNEL
The ventilation unit is operated by means
of four buttons.
Summer, winter or automatic operation
The two buttons on the left-hand side
switch over between summer, winter or
automatic operation.
Summer
The summer or bypass oper-
ation supports cooling of the
living area.
Under certain conditions, the heat ex-
changer can be avoided by means of the
bypass and the cold outdoor air is directly
blown into the room.
Winter
In winter operation, the outdoor
air is always conveyed via the
heat exchanger.
Automatic operation Switch-on/switch-
o
By pressing the [Summer] and [Winter]
buttons at the same time, automatic oper-
ation is activated, automatically changing
between summer and winter operation,
depending on the outdoor temperature.
Active automatic operation is indicated
when the summer and winter LED is lit.
By pressing the [Summer] or [Winter] but-
ton, automatic operation is deactivated.
BUTTONS AND LEDS
The following compact ventilation unit
functions can be configured with the MINI
control unit:
• Selection of the “Standby” or “Basic
ventilation” operating mode
• Ventilation level of the compact ventila-
tion unit
• Change-over between summer, winter,
or automatic operation
• Display of filter replacement messages
• Display of fault messages via LED
FUNCTIONS
8. MINI control unit

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 13
USER GENERALSPECIALIST PERSONNEL
The two buttons on the right-hand side
change the ventilation level of the unit.
With the [+] button, the ventilation level
is increased until LevelIII is reached,
which corresponds to a boost ventilation
process. After one hour of operation in the
highest ventilation level, the system au-
tomatically returns to the normal setting,
LevelII. Alternatively, you can stop the
boost ventilation mode manually before
one hour has passed. Simply press the [-]
button on your control unit.
Standby or basic ventilation
If a ventilation level lower than I is select-
ed, the unit either switches to standby or
to basic ventilation operation. For details,
see Section 9, “Ventilation level”.
LEDs
The dierent states of the ventilation unit
are indicated by LEDs. Three LEDs display
the current ventilation level.
The LEDs for summer, winter, or auto-
matic mode are located on the left-hand
side, arranged next to the corresponding
buttons.
Filter replacement
The potential need for filter replacement
is indicated by the LED on the bottom left.
For details regarding the subject of filter
replacement, see Section 11, “Filter main-
tenance”.
Error messages
The LED for error messages is located
on the bottom right. Please contact your
installer! For details with regard to the
error messages, see Section 19, “Error
description”.
CHANGING THE VENTILATION LEVEL
START MENU
1 Current operating mode
2 Ventilation level
3 Temperature (indoor air, supply air or extract air)
4 Menu
5 Date and time
Tuesday, 26.05.2018
05
.
2018
13:45
Summer
(auƚŽmaƟĐ Ϳ
seŶƟůaƟŽŶ ůeǀeů2
(Ɵme ƉrŽŐram, K2Ϳ
TemƉeraƚure 22
2
°
2
°

(Ɵme ƉrŽŐram 20
0
°
0
°
Ϳ
Menu
1
2
3
5
4
9. TOUCH control unit

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 14
USER GENERALSPECIALIST PERSONNEL
The general principle should
be observed: “Provide as much
ventilation as is necessary”
Adjusting the air volumes requires the
necessary knowledge and is carried out
by the specialist during commissioning.
The ventilation levels can be configured in
the “Standby” or “Basic ventilation” mode.
Depending on these settings, selection of
the lowest ventilation level establishes
standby or basic ventilation mode.
If ventilation is too low, poor indoor air
quality or mould formation may result in
living areas.
If ventilation is too high, indoor air may
become too dry – particularly in the colder
months.
The active ventilation level is displayed by
various buttons. The ventilation level can
be changed by pressing the button. The
following selection options are available:
Time program
The system runs at the ventilation level
that is currently programmed. The time
program can be programmed in the
[menu] under [Settings].
Demand-driven air volume control is
established on a higher level with both the
time program and the manual selection
of the ventilation level and with connect-
ed and configured CO2and/or humidity
sensors. Programming is carried out in
the [Settings] > [Additional functions]
menu item.
OPERATING MODE
The active operating mode is displayed by
various buttons. The operating mode can
be changed by pressing the button. The
following operating modes are available:
Summer
The summer or bypass mode
supports cooling of the living
area.
Under certain conditions, the heat
exchanger is avoided by means of the
bypass and the cold outdoor air is directly
blown into the room.
Winter
In winter mode, the outdoor air
is always conveyed via the heat
exchanger.
Automatic
In automatic operation, an automatic
change-over from summer to winter
operation is carried out, depending on the
outdoor temperature.
Automatic operation is indicated in brack-
ets below the current operating mode.
KƉeraƟŶŐ mŽde
Summer
Automatic
Winter
VENTILATION LEVEL
seŶƟůaƟŽŶ ůeǀeů
Level 1
Ventilation
Time program On Off

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 15
USER GENERALSPECIALIST PERSONNEL
Manual selection
When the time program is deactivated
[OFF], the ventilation level can be selected
manually. This selection is executed via
the [+] and [-] buttons and the [OK] button
in the lower area of the control unit.
Standby configuration
Ventilation level 1
The unit is running in ventilation
level 1
Ventilation level 2
The unit is running in ventilation
level 2
Ventilation level 3
The unit is running in ventilation
level 3
By selecting ventilation level 3, the boost
ventilation function is activated. After one
hour of operation in the highest ventilation
level, the system automatically returns to
the ventilation level set previously. Alter-
natively, you can stop the boost ventilation
process manually before one hour has
passed by selecting a lower ventilation
level.
Standby
The unit is in Standby mode. The
fans are not moving.
Configuration of basic ventilation
Ventilation level 1
The unit is running in ventilation
level 1.
Ventilation level 2
The unit is running in ventilation
level 2.
Ventilation level 3
The unit is running in ventilation
level 3.
By selecting ventilation level 3, you
activate the boost ventilation function.
After one hour of operation in the highest
ventilation level, the system automati-
cally returns to the ventilation level set
previously. Alternatively, you can stop the
boost ventilation process manually before
one hour has passed by selecting a lower
ventilation level.
Basic ventilation
The unit is running with a min-
imum air volume. The fans are
running at a low speed.
seŶƟůaƟŽŶ ůeǀeů
Level 1
Ventilation
Time program On Off
seŶƟůaƟŽŶ
Level 1
Ventilation
Time program On Off

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 16
USER GENERALSPECIALIST PERSONNEL
Higher-level air volume control
There are various configurations and op-
erating modes that result in your ventila-
tion unit being operated with air volumes
other than those set, e.g.:
CO2concentration-based control (Fig. 1)
Acceptable indoor air should not exceed a
CO2concentration of 1000ppm, meaning
that active ventilation should take place
every 1 to 2 hours. A living room venti-
lation unit with CO2 concentration-based
control (CO2sensor module available as
part of the accessories) automatically en-
sures that a defined CO2value of 900ppm
is not exceeded.
Humidity concentration-based control
(Fig. 2)
The relative humidity is a factor that also
contributes significantly to a comfortable
living climate. Acceptable humidity is
defined by a comfort window.
In the case of a ventilation unit with
humidity concentration-based control (RH
sensor module available as part of the
accessories), a permanently defined rela-
tive humidity setpoint of 65% is stored. If
this value is exceeded, the ventilation unit
switches to the highest fan level for 60
minutes.
Figure 1: Schematic diagram showing the increase in CO2 concentration in a flat/room with occupants with
and without mechanical ventilation.
Figure 2: Representation of the comfort window as a function of the air temperature and relative humidity.
DEMAND-DRIVEN AIR VOLUME CONTROL
Decreasing
power of
concentration,
headache
Unpleasant
Pleasant
CO2 concentration in ppm
Closed window
Mech. domestic ventilation
Fresh outdoor air: 400 ppm
Hours
Based on Leusden and Freymark
Uncomfortably damp
Uncomfortably dry
Comfortable
Still comfortable
Ambient temperature in °C
Relative humidity of the ambient air in %
Constructional upper limit
(condensate, mildew...)
approx. 45% to 55%
Minimum human comfort
level 20%
Ideal 35% to 45% rel. humidity
Graphical representation:

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 17
USER GENERALSPECIALIST PERSONNEL
TEMPERATURE
The main menu will open when the Menu
button is pressed. Information on the
ventilation unit is displayed here, and
various settings can be made and actions
performed.
By pressing the Home button
you return to the Start menu.
Depending on the setting, closed-loop
control is based on the indoor air, extract
air or supply air temperature. The desired
temperature can be entered via the con-
trol unit. The “Settings” item under “Tem-
perature control” in Section9 provides
more information on this subject.
Deactivated time program [OFF]
Setpoint temperature in normal operation.
When the time program is deactivated,
this temperature is always the tempera-
ture defined for the control process.
Activated time program [ON]
(for dierent time-of-day setpoint temper-
atures)
Setpoint temperature in normal operation
and in setback mode.
When the time program is activated, a
switch-over between these two setpoint
temperatures is carried out.
The temperature is controlled
in the standard design of the
ventilation unit via the integrat-
ed bypass circuit and is limited by the
outdoor air conditions without the use of
the optionally available heater, cooling or
combination batteries in the supply air.
Temperature
22.0
0
°
°
C
Standard mode
On
Extract airControl
Time program Off
MAIN MENU
/ŶĨŽrmaƟŽŶ
SeƫŶŐs
ĐƟŽŶs
Main menu Tuesday , 26.05.2018
05
.
2
01
8
13:45
Temperature
22.0
0
°
0
°
C
Standard mode
20.0
0
°
0
°
C
Setback operation
Time program On Off

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 18
USER GENERALSPECIALIST PERSONNEL
Current operating values, operating hours,
messages and firmware versions can be
retrieved under the [Information] menu
item.
Current operating values
Time meter
Messages
The current errors and error logs, e.g.
regarding a filter replacement, are shown
here.
Current errors
Active errors are shown here.
Error log
A history of the last 100 errors is listed
here.
Filter log
The filter replacement processes carried
out are documented here.
Current errors
No entries
Error log
Z04 – Error in extract air fan 16.05.2018 09:20
Z02 – CommunicaƟon error
16
.
05
.
20
18
15.05.2018
09
:
20
09:15
Z04 Error in extract air fan
15
.
05
.
20
18
14.05.2018
09
:
15
09:15
Z05 – Error in supply air fan
14
.
05
.
20
18
14.05.2018
09
:
15
09:11
Filter log
ir Įlter cŚanged 16.03.2018 09:20
INFORMATION
/nformaƟon
Time meter
Current operating values
Messages
Device information
Current operaƟng ǀalues
Supply air temperature 23.5
5
°
5
°
C
Extract air temperature
23
.
25.0
5
0
0
°
C
5
C
0
0
°
C
Kutdoor air temperature
25
.
23.0
0
0
0
°
C
0
C
0
0
°
C
ExŚaust air temperature
23
.
24.8
0
8
8
°
C
0
C
8
8
°
C
Supply air ǀolume Ňoǁ
24
.
8
8
C
C
150 m³/h
Extract air ǀolume Ňoǁ
150
m
/
h
150 m³/h
Extract
a
External Kī /nacƟǀe
/ntensiǀe ǀenƟlaƟon /nacƟǀe
Frost protecƟon /nacƟǀe
Time meter
Next Įlter replacement 73 ays
senƟlaƟon leǀel 1 118 ,ours
senƟlaƟon leǀel 2 217 ,ours
senƟlaƟon leǀel 3 58 ,ours
asic ǀenƟlaƟon 12 ,ours
senƟlaƟon mode total 405 ,ours
WreͲheater ďaƩery 0 ,ours
Bypass 16 ,ours
Messages
Error log
Current errors
Filter log Device information
Firmware control 1.0
Firmware display 1.0
LG model 350
Device ID 123456789012
Internet connection
IP address
established
192.168.0.13

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 19
USER GENERALSPECIALIST PERSONNEL
Volume flow per ventilation level
The volume flow for each individual venti-
lation level can be set here.
Time programs
Various settings for the ventilation level
and the temperatures can be carried out
for each day of the week.
Time program ventilation level
A total of three switching times for the
change-over to another ventilation level is
provided per day. With the “Accept for all
days” button, the switching points of the
day currently selected can be accepted for
all other days of the week.
Switching point for operation with ventila-
tion level 3.
SETTINGS
Seƫngs
Time programs
Ventilation levels
Additional functions
Temperature control
Time program seƫngs
Temperature
Ventilation levels
Seƫngs
Language
Date & time
Time program ǀenƟlaƟon leǀels
Monday
from time 06 00
Level 3
senƟlaƟon leǀel seƫngs
Level 1 125 m³/h
Level 2 200
0
m³/h
Level 3 300
0
m³/h
Basic ventilation 50 m³/h
Device information
Firmware versions used for the controller
and control unit as well as the type of ven-
tilation unit are shown here. The device
ID shown is relevant for remote access
via the Internet (remote maintenance) or
when utilising the Pichler app.
Seƫngs of ǀenƟlaƟon leǀel 1
Setpoint value 90 m³/h
Time program ǀenƟlaƟon leǀels
from
m
08:30 Level 1
18:00 Level 2
Accept for all days
06:00 Level 3
Monday
from
from

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 20
USER GENERALSPECIALIST PERSONNEL
Time program temperatures
A total of three switching times for the
change-over to another setpoint tempera-
ture is provided per day. With the [Accept
for all days] button, the switching points of
the day currently selected can be accept-
ed for all other days of the week.
Temperature control
Depending on the setting, the closed-loop
control process is carried out on the basis
of the room air, extraction air or supply air
temperature.
Additional functions
The additional functions configured by
the specialist during commissioning can
be activated and deactivated here. The
precondition is the installation of the
optional sensors or the heater, cooling or
combination battery.
CO2 concentration-based control
Enables the higher-level air volume con-
trol as a function of the CO2concentration
measured.
Humidity control
Changes automatically to operation with
ventilation level 3 when the relative hu-
midity exceeds 65%.
Heater battery
Enables re-heating of the supply
air downstream of the ventila-
tion unit. This function is only provided in
winter operation.
Cooling battery
Enables cooling of the supply air down-
stream of the ventilation unit. This func-
tion is only provided in summer operation.
When a combination battery (cooling
battery that can also be used for heating)
is used, the heater battery and the cooling
battery must be activated.
Time program ǀenƟlaƟon leǀels
Monday
from time 00
Level
e
l 3
0
0
0
6
Time program temperatures MONDAY
normal from 06:00
reduced from 22:30
Accept for all days
--
-
:
--
:
-- --
-
:
--
:
--
Seƫngs temperature control
Extract airControl
Seƫngs addiƟonal funcƟons
CO2 control ON/OFF
Heater battery ON/OFF
Humidity control ON/OFF
Cooling battery ON/OFF