Pichler LG 350 User manual

Systematic Ventilation.
COMFORT
VENTILATION
For details – see the brochure
EU-Regulation
1253/2014
ErP
2018
2016 1254/2014
ENERGIA · ЕНЕРГИЯ · ΕΝΕΡΓΕΙΑ · ENERGIJA · ENERGY · ENERGIE · ENERGI
LG 350
A
38
dB
350 m³/h
A++
A+
A+++
A++
A+
A-80%
A-60%
A-40%
A-20%
+
A+
A
B
C
D
E
F
G
in approval
optional
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
Contents
1. Introduction Page 4
2. General information Page 4
3. Function of the ventilation system 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
9. TOUCH control unit Page 13
10. Faults & messages Page 22
MINI CONTROL UNIT PAGE 22
TOUCH CONTROL UNIT PAGE 22
11. Pichler-App & Pichler Connect Page 22
EASY OPERATION WITH THE PICHLER APP PAGE 22
REMOTE ACCESS / PICHLER CONNECT PAGE 22
PRIVACY PAGE 23
12. Filter maintenance Page 23
FILTER MESSAGE ON THE MINI CONTROL UNIT PAGE 23
FILTER MESSAGE ON THE TOUCH CONTROL UNIT PAGE 23
FILTER REPLACEMENT PAGE 24
specialist personnel - MoUnting / installation
13. Scope of supply, transport, storage and disposal Page 25
SCOPE OF SUPPLY PAGE 25
TRANSPORT, STORAGE AND PACKAGING PAGE 25
DISPOSAL PAGE 25
14. Technical data Page 26
VERSIONS PAGE 26
OVERVIEW ENERGY EFFICIENCY CLASSES PAGE 26
TECHNICAL SPECIFICATIONS PAGE 27
SOUND DATA PAGE 28
CHARACTERISTIC CURVE – EXTERNAL PRESSURE INCREASE – AIR VOLUME FLOW PAGE 29
UNIT DESIGN PAGE 30
SAFETY DEVICES PAGE 32

USER GENERALSPECIALIST PERSONNEL
OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 3
15. System description and expansion options Page 33
FROST PROTECTION OPTIONS PAGE 33
SYSTEM EXTENSION FOR EXTERNAL SUPPLY AIR CONDITIONING PAGE 37
16. TOUCH control unit service level Page 41
TOUCH CONTROL UNIT TEST MODE PAGE 41
17. Mounting Page 43
PREREQUISITES FOR INSTALLATION OF THE UNIT PAGE 43
OPENING THE UNIT PAGE 44
UNIT INSTALLATION PAGE 44
ESTABLISHING THE CONDENSATE DRAIN CONNECTION PAGE 46
CONNECTING AIR DUCTS AND COMPONENTS PAGE 47
LEGEND FOR AIR TYPES PAGE 47
18. Electrical connection Page 48
OPENING THE UNIT PAGE 48
CONTROL PCB PAGE 48
MAINS CONNECTION AND REPLACEMENT OF THE INTERNAL DEVICE FUSING PAGE 49
ELECTRICAL CONNECTION DIAGRAM PAGE 50
ELECTRICAL CONNECTION DIAGRAM FOR THE MINI OR TOUCH CONTROL UNIT PAGE 52
ELECTRICAL CONNECTION DIAGRAM – EXTERNAL INPUTS PAGE 54
CONNECTING THE CONTROL UNIT TO THE CONTROL PCB PAGE 55
MOUNTING THE TOUCH CONTROL UNIT PAGE 55
CIRCULATING PUMPS PAGE 55
19. Maintenance and cleaning Page 56
SAFETY INSTRUCTIONS PAGE 56
MAINTENANCE INSTRUCTIONS PAGE 56
HEAT EXCHANGER PAGE 56
FANS PAGE 57
ELECTRICAL PRE-HEATER BATTERY (OPTIONAL) PAGE 57
CLEANING THE INSIDE OF THE UNIT HOUSING PAGE 58
CONDENSATE DRAINAGE PAGE 58
SERVICE TABLE PAGE 59
specialist personnel - coMMissioning – service
20. Commissioning Page 61
BASIC STEPS OF THE COMMISSIONING PROCEDURE PAGE 61
SETTING SYSTEM PARAMETERS PAGE 61
21. Error description Page 62
MINI CONTROL UNIT PAGE 62
TOUCH CONTROL UNIT PAGE 62
22. Installation/operation of the service software and
firmware updates Page 62
23. 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
ACCESSORIES PAGE 63
GATEWAY PAGE 63
24. Changes reserved Page 63
25. Product data sheets Page 64
26. 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 technolo-
gy. They are characterised by cost eec-
tiveness, 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 per-
fect 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 documenta-
tion.
2. General information
J. Pichler
Gesellschaft m.b.H
AUSTRIA
9021 KLAGENFURT
Karlweg 5
T [phone]
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 [phone]
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 infor-
mation 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 tech-
nically 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 residen-
tial 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 pro-
tection mechanism and the provision of
an eective condensate discharge are of
utmost importance in this respect.
The LG 350 and LG 450 compact ventila-
tion 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 ar-
eas 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 desig-
nated 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 aggres-
sive 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 im-
proper 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 residen-
tial 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 instal-
lation 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 uncon-
trolled 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 per-
sonnel may work on and with the unit.
Personnel transporting, install-
ing or working on the unit must
have read and understood the
operating instructions, in particular Sec-
tion 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 materi-
als 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 oc-
curring 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 instruc-
tions.
WARRANTY

OPERATING AND INSTALLATION INSTRUCTIONS LG 350 AND LG 450 PAGE 8
USER GENERALSPECIALIST PERSONNEL
5. Safety
Read these operating and installation in-
structions carefully and observe the notes
on safety during installation, commission-
ing 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 specifi-
cations given in this document must not
be altered. Failure to observe these safety
requirements, warning notices, notes and
instructions during installation and main-
tenance 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 infor-
mation provided in Section 4 “Designated
Use”.
All safety and danger notices attached to
the unit and mentioned in these instruc-
tions 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, qual-
ified 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 ventila-
tion 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 instal-
lation and setup. The unit must
be installed in compliance with national
installation regulations.
Installation shall be carried out in accord-
ance with the general, locally applicable
building, safety and installation regula-
tions 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 consist-
ently between +5°C min. and +35°C max.
The unit is designed for free-standing in-
stallation 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ec-
tive 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 insu-
lated to prevent heat loss or condensate
formation (for temperatures under dew
point). Observe all locally-applicable con-
struction and fire protection guidelines,
regulations and standards. If necessary,
appropriate suitable measures must be
taken when installing the unit, e.g. the in-
stallation 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
performed. 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 dam-
age 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 op-
erated only in accordance with the project
documentation, which shall comply with
the Equipment and Product Safety Act and
the pertinent provisions of the EC Direc-
tives and Standards.
Consider environmental impacts and re-
frain 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 re-
placed, 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-depend-
ent 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 pro-
visions 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 ventila-
tion 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 installa-
tion 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 Pichlerluft
app. For details, see section 11. “Pichler-
App & Pichler Connect”.
The optional expansion options by the CO2
sensor module and the humidity sen-
sor allow for demand-driven ventilation
operation.
The LG350 and LG450 compact ventila-
tion 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 measure-
ment, which guarantees balanced oper-
ation 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 con-
trol unit for setting the basic functions
• optionally with the comfortable TOUCH
control unit, with an integrated room
temperature sensor for enhanced
operation and display, as well as with an
optional swiveling console. The TOUCH
operating control unit can be attached
directly to the ventilation unit on a
swiveling console.
• 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 [phone]

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 12, “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 21, “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
13:45
Summer
(automac )
Venlaon level 2
(me program, CO2)
Temperature 22 °C
(me program 20 °C)
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 CO2 and/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.
Operang mode
Summer
Automatic
Winter
VENTILATION LEVEL
Venlaon level
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.
Venlaon level
Level 1
Ventilation
Time program On Off
Venlaon
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 CO2concentration-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
relative 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 CO2concentration 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 tem-
peratures)
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 °C
Standard mode
On
Extract airControl
Time program Off
MAIN MENU
Informaon
Sengs
Acons
Main menu Tuesday , 26.05.2018
13:45
Temperature
22.0 °C
Standard mode
20.0 °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.
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.
Current errors
No entries
Error log
Z04 – Error in extract air fan 16.05.2018 09:20
Z02 – Communicaon error 15.05.2018 09:15
Z04 Error in extract air fan 14.05.2018 09:15
Z05 – Error in supply air fan 14.05.2018 09:11
Filter log
Air filter changed 16.03.2018 09:20
INFORMATION
Informaon
Time meter
Current operating values
Messages
Device information
Current operang values
Supply air temperature 23.5 °C
Extract air temperature 25.0 °C
Outdoor air temperature 23.0 °C
Exhaust air temperature 24.8 °C
Supply air volume flow 150 m³/h
Extract air volume flow 150 m³/h
External Off Inacve
Intensive venlaon Inacve
Frost protecon Inacve
Time meter
Next filter replacement 73 Days
Venlaon level 1 118 Hours
Venlaon level 2 217 Hours
Venlaon level 3 58 Hours
Basic venlaon 12 Hours
Venlaon mode total 405 Hours
Pre-heater baery 0 Hours
Bypass 16 Hours
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 ventilation level 3.
SETTINGS
Sengs
Time programs
Ventilation levels
Additional functions
Temperature control Time program sengs
Temperature
Ventilation levels
Sengs
Language
Date & time
Time program venlaon levels
Monday
from time 06 00
Level3
Venlaon level sengs
Level 1 125 m³/h
Level 2 200 m³/h
Level3 300 m³/h
Basic ventilation 50 m³/h
Sengs of venlaon level 1
Setpoint value 90 m³/h
Time program venlaon levels
from 08:30 Level 1
18:00 Level 2
Accept for all days
06:00 Level 3
Monday
from
from
Time program venlaon levels
Monday
from time 00
Level 3
06

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 opera-
tion with ventilation level 3 when
the relative humidity exceeds 65%.
Heater battery
Enables re-heating of the supply air
downstream of the ventilation unit. This
function is only provided in winter oper-
ation.
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.
Date & time
In this menu item, various date and time
settings can be carried out.
Date
In the date field, the current day and
month are set. The active field is high-
lighted in white. By pressing the [+] or [-]
button, the value is changed. By pressing
the [OK] button, the value is accepted.
Time program temperatures MONDAY
normal from 06:00
reduced from 22:30
Accept for all days
--:-- --:--
Sengs temperature control
Extract airControl
Sengs addional funcons
CO2 control ON/OFF
Heater battery ON/OFF
Humidity control ON/OFF
Cooling battery ON/OFF
Date & me sengs
Time
Date
19 05Date
2018Year
Date & me sengs
19 05Date
2018Year
Date & me sengs