Pichler LG 500 P-R User manual

Systematic ventilation.
COMFORT
VENTILATION
The specified energy eciency
is applicable when controlled to
local requirements and is valid
up to the specified maximum air
flow volume.
EU Regulation
1253/2014
ErP
2018
2016 1254/2014
ENERGIA · ʫʻʫˀʧʰ˔ · ȵɁȵɆȳȵȻȰ · ENERGIJA · ENERGY · ENERGIE ͽEZ'/
LG 500W
A
42
dB
445 m³/h
+
A+
A
B
C
D
E
F
G
OPERATING AND
INSTALLATION INSTRUCTIONS
LG 500 P

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 2
USER GENERALSPECIALIST PERSONNEL
Contents
1. Introduction Page 4
2. General Page 4
3. Use in compliance with the intended use Page 5
INTENDED USE PAGE 5
STIPULATIONS FOR OPERATION WITH FIREPLACES PAGE 6
STIPULATIONS IN CONNECTION WITH EXTRACTOR HOODS PAGE 6
LIABILITY PAGE 6
WARRANTY PAGE 7
4. Safety Page 8
SYMBOLS USED PAGE 8
SAFETY REGULATIONS PAGE 8
SETTING UP THE UNIT PAGE 9
ELECTRICAL CONNECTION WORK PAGE 10
OPERATION OF THE SYSTEM PAGE 11
USER GUIDE
5. Customer service Page 12
6. Ventilation unit design Page 12
7. Control unit Page 13
8. Messages / Faults Page 17
ALARM DISPLAY PAGE 17
WEB-SERVERS PAGE 17
9. Filter maintenance Page 18
MAINTENANCE INSTRUCTIONS (AIR FILTER) PAGE 18
FILTER MESSAGE ON THE „PI-HMI“ PAGE 18
FILTER MESSAGE ON THE WEB SERVER PAGE 18
FILTER CHANGING PAGE 19
CLEARING FILTER MESSAGES PAGE 19
SPECIALIST PERSONNEL - MOUNTING / INSTALLATION
10. Scope of Supply, Transport & Packing, Storage & Disposal Page 20
SCOPE OF SUPPLY PAGE 20
TRANSPORT AND PACKAGING PAGE 20
STORAGE PAGE 20
WASTE DISPOSAL PAGE 20
11. Technical specifications Page 21
UNIT SPECIFICATIONS PAGE 21
CHARACTERISTIC EXTERNAL PRESSURE INCREASE -
AIR VOLUME FLOW WITH VOLUME FLOW CONSTANT FUNCTION PAGE 21
ACOUSTIC SPECIFICATIONS PAGE 22
GERÄTEAUFBAU PAGE 22
VERSIONS PAGE 24
DIMENSIONS PAGE 25
12. Functioning of the ventilation system Page 26
FUNKTIONAL OVERVIEW PAGE 26

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 3
USER GENERALSPECIALIST PERSONNEL
SYSTEM DESCRIPTION PAGE 27
POSSIBILITIES OF SYSTEM EXPANSIONS FOR FROST PROTECTION PAGE 28
SYSTEM EXTENSION FOR EXTERNAL AUXILIARY HEATING PAGE 31
SYSTEM EXTENSION FOR EXTERNAL COOLING PAGE 32
EXTERNAL CONTROL EXTENSION FOR EXTERNAL WATER REGISTERS PAGE 32
DEMAND-DRIVEN PLANT OPERATION PAGE 33
CO2/VOC-CONTROLL PAGE 33
EXTERNAL CONTROL EXTENSION WITH PRESSURE SENSORS PAGE 33
FAN OPTIMISER PAGE 34
PICHLER OPTIMIZER SYSTEM PAGE 34
13. Installation Page 35
PREREQUISITES FOR INSTALLATION OF THE UNIT PAGE 35
UNIT INSTALLATION PAGE 36
CONNECTION OF AIR LINES AND COMPONENTS PAGE 38
LEGEND FOR THE SYMBOLS USED PAGE 38
SEALING PAGE 38
14. Electrical connection Page 39
PROCEDURE PAGE 39
CONNECTION TO WEB SERVER (OPTIONAL!) PAGE 40
INSTALLATION CONTROL UNIT PAGE 40
INSTALLATION ON FLAT SURFACE PAGE 40
INSTALLATION IN WALL BOX/PANEL FRONT PAGE 41
MODBUS CONNECTION PAGE 42
MAINS CONNECTION PAGE 42
15. Servicing and cleaning Page 43
SAFETY DIRECTIONS PAGE 43
SERVICE INSTRUCTIONS FOR THE SPECIALIZED INSTALLING COMPANY PAGE 43
ELECTRICAL PTC PREHEATER BATTERY (OPTIONAL) PAGE 44
UNIT’S HOUSING - INTERNAL CLEANING PAGE 45
CONDENSATE DRAINAGE PAGE 45
SERVICE TABLE PAGE 46
SPECIALIST PERSONNEL - COMMISSIONING - SERVICE
16. Initial startup Page 47
BASIC PROCEDURE FOR INITIAL STARTUP PAGE 47
SETTING THE SYSTEM PARAMETERS PAGE 47
17. Installation / Operation from the web server Page 47
18. Spare parts and accessories Page 48
CONTROL ELEMENTS PAGE 48
SYSTEM COMPONENTS PAGE 48
AIR FILTERS PAGE 48
OTHER PAGE 48
19. Subject to change Page 48
20. Product data sheets Page 49
PRODUCT DATA SHEET: LG 500 P PAGE 49
PRODUCT DATA SHEET: LG 500 PF PAGE 50
21. EC Declaration of Conformity Page 51

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P ... PAGE 4
USER GENERALSPECIALIST PERSONNEL
1. Introduction
Dear customer, thank you for your deci-
sion to purchase the compact ventilation
unit LG 500 P.
The compact ventilation unit LG 500 P is
a state-of-the-art device. Its convincing
features are its high degree of economy,
operator friendliness and operational
safety.
To operate your compact ventilation
unit safely, properly, and economically,
please carefully read and comply with
these operating instructions.
Use the ventilation unit only in per-
fect condition, in compliance with the
intended use, in a manner that is safety
and danger conscious and in compliance
with all information provided in these
instructions.
If you have any queries or spare parts
orders, please have the unit type and
serial number (see type plate on the
unit) at hand.
Please contact us if you have any further
queries or you have lost the documen-
tation.
2. General
This chapter contains general informati-
on on the compact ventilation unit
LG 500 P with control unit type „PI-HMI“.
READ THESE INSTRUCTIONS
CAREFULLY BEFORE INITIAL
STARTUP OF THE UNIT!
This Manual contains notes and infor-
mation on safe operation and proper
installation of the LG 500 P compact
ventilation unit and on its use and
servicing. Refer to this Manual during
servicing to ensure proper execution of
the tasks. Keep this operating manual in
a safe place and readily available at all
times.
Fault rectification and intervention work
may only be performed by a licensed,
specialist installation company. We are
continuously improving and developing
our products. Your unit may therefore
differ slightly from the one referred to in
these instructions.
Subject to change without notice:
These instructions have been drawn
up with the greatest care. However, no
rights may be derived from them. We
constantly make every effort to make
technical improvements to and optimi-
zations of our products and reserve the
right to partially or wholly modify the
units or technical specifications without
prior notice.
For the compact ventilation unit
LG 500 P, our „General Terms and Condi-
tions“ in the applicable version apply.

J. Pichler
Gesellschaft m.b.H
ÖSTERREICH
9021 KLAGENFURT
Karlweg 5
T+43 (0) 463 32769
www.pichlerluft.at

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OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 5
USER GENERALSPECIALIST PERSONNEL
The compact ventilation unit LG 500 P
is used for the controlled mechanical
supply and extract air ventilation of
larger residential houses, as a centra-
lized unit for up to 5 homes, schools,
Doctor’s practices, offices and similar
applications. The range of use extends
fundamentally to effective areas of
150 m² to approx. 400 m² that are desig-
ned as passive or low energy structures,
with an adjustable air volume flow up to
550 m³/h.
The entire living area is provided with
supply air and exhaust air ventilation by
installing a mechanical, controlled venti-
lation system for apartments. Controlled
air supply with purified and filtered
outdoor air is provided in the outdoor air
areas. Odours and damp/used ambient
outlet air are dissipated in the outlet air
area.
The purpose of the controlled mecha-
nical ventilation of living areas is to im-
prove air quality and to reduce heating
requirements through the use of a highly
efficient heat recovery system as well as
influencing indoor air humidity.
The application range and intended use
of the unit is limited to use in indoor air
treatment systems for exhausting con-
sumed air and supplying fresh, tempera-
te outdoor air at a maximum conveying
temperature of -15 °C to +35 °C. In ad-
dition, the conveyed air must be free of
aggressive vapours and wear-inducing
materials. Any other application shall be
deemed to be diverting from the inten-
ded use. The manufacturer shall assume
no further liability for any damages or
consequential damages resulting from
non-intended use.
Intended use also includes observing
our prescribed operating and installation
instructions. This unit, which is acces-
sible for the general public, is intended
for installation in residential or com-
mercial buildings. The unit is used for
mechanical ventilation of indoor air and
also for air reheating in conjunction with
a heater battery.
This unit is not intended to be used by
people (including children) with limited
physical, sensory, or mental capabilities
or with a lack of suitable experience
and/or knowledge, unless supervised
by a person who is responsible for their
safety or from whom they receive inst-
ructions on how to use the unit.
The unit is not suitable for installation
in the open air and must be installed
in suitable and temperaturecontrolled
indoor rooms. The ventilation unit is not
suitable for drying out new-build proper-
ties. When the unit is shut down, ensure
that no air circulation can occur through
the unit.
The compact ventilation unit LG 500 P
is not a ready-to-use product. It must
not be put into operation until it has
been properly installed and connected
in the indoor air treatment system. Only
qualified, assigned personnel may work
on and with the unit.
Any individual who transports,
sets up or works on the unit
must have read and understood
these operating instructions, particularly
Chapter 4 „Safety“, page 8. In addition,
the end user has to be informed of any
dangers that might occur.
INTENDED USE
3. Use in compliance with the intended use

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P ... PAGE 6
USER GENERALSPECIALIST PERSONNEL
The compact ventilation unit LG 500 P
has been developed and manufactured
for use in the controlled mechanical ven-
tilation of living areas and rooms with a
similar purpose, such as seminar rooms
and small offices.
For proper operation of the central air
conditioning systems, it must be pos-
sible to close any ducts for combustion
air and flue gas systems of fireplaces
drawing in room air.
Any other use is considered to be an
improper use and can lead to perso-
nal injury or damage to the compact
ventilation unit LG 500 P, for which the
manufacturer cannot be held liable.
In the event of the following the
manufacturer is liable for no damage
whatsoever:
• non-compliance with the safety,
operating and servicing instructions
listed in these operating and installati
on instructions
• the installation of replacement parts
that are not supplied by the manufac
turer, whereby the responsibility for
the use of such replacement parts lies
completely with the system installer/
fitter.
• normal wear
On account of the heavy load and irre-
gular operation the extract air of any
kitchen extractor hood present must
not be integrated into the apartment’s
ventilation system. The extract air from
such extractor hoods should be removed
separately out of the roof via an exhaust
air line. The supply air is provided sepa-
rately, e.g. via the window ventilation.
If an extractor hood is being operated
without separate introduction of the
supply air, the air volume balance in the
apartment is no longer balanced and the
proper functioning of the apartment’s
ventilation system is not ensured (odour
entrainment etc.). One possibility is to
operate the extractor hood with adequa-
te air filtering in recirculated air mode.
Local requirements in terms of stand-
ards, 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 will monitor
waste gas extraction of a heating
apparatus dependent on room air.
For ambient air-dependent heating
systems for liquid, gaseous and solid
fuels, the heating or ventilation system
must be switched off in the event the
safety equipment triggers.
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 multi-
ple infeeds.
For normal operation of central air con-
ditioning systems, it must be possible
to close any ducts for combustion air
or waste gas systems from heating
apparatus dependent on room air. Shut-
off 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-off unit.
This is deemed complied with if a shut-
off system is used to block soot (soot
shut-off).
Fire protection requirements
The regional regulatory provisions,
especially the fire protection regula-
tions for air conditioning of buildings, as
amended, must be taken into considera-
tion when installing the air conditioning
system in accordance with the instruc-
tions for fire protection.
STIPULATIONS FOR OPERATION WITH
FIREPLACES
STIPULATIONS IN CONNECTION WITH
EXTRACTOR HOODS
LIABILITY

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 7
USER GENERALSPECIALIST PERSONNEL
The warranty begins with initial startup,
at the latest, however, one month after
delivery has taken place. The warranty
covers the pure replacement of materi-
als only and does not include any claims
for the compensation of services. It
applies only if there is proof of appropri-
ately performed servicing in accordance
with our regulations and by a licensed
company that specializes in installation
work.
The warranty claim extends for a maxi-
mum period of 24 months after installa-
tion of the compact ventilation unit
LG 500 P, however, up to a maximum of
30 months after the date of manufac-
ture.
Warranty claims can be asserted only
for material and/or design defects that
have occurred during the warranty term.
In the case of a warranty claim, the com-
pact ventilation unit LG 500 P may not be
removed without prior written approval
of the manufacturer.
The manufacturer accords a warranty
on spare parts only if they have been in-
stalled by an installer who is recognized
by the manufacturer.
The warranty shall expire automatically
at the end of the warranty period, or in
the case of improper operation, such
as operating without filters, installation
of parts not supplied by the manufac-
turer, or where non-approved changes
or modifications have been made to the
system.
Failure to comply with these Operating
and Installation Instructions will auto-
matically void all warranties.
WARRANTY

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P ... PAGE 8
USER GENERALSPECIALIST PERSONNEL
Installation, commissioning,
maintenance, and repair must
be performed by an authorised
specialist (heating specialist firm/instal-
lation specialist firm).
The local national regulations and stan-
dards apply without restriction beyond
these operating installation instructions
in respect of operation of the unit.
Ensure that your system installer/fitter
shows you how to operate the unit and
the control unit after installation. Use of
the ventilation unit may only take place
in accordance with the use set out in
Chapter 3 „Use in compliance with the
intended use“, page 5.
All safety and danger notices attached to
the unit and described in these instruc-
tions must be observed. In the event
of any malfunctions, shut down the
unit immediately and secure it suitably
against being switched back on. Faults
on the unit must be rectified immedia-
tely. Make sure that children do not play
with the unit.
After servicing and maintenance work,
the operating safety of the device should
be re-established by expert personnel.
The attachment or installation of ad-
ditional parts and components is not
permitted. Any modifications or changes
to the compact ventilation unit LG 500 P
are prohibited. Only original replacement
parts may be used.
Modifications and adaptations to the
ventilation unit are not permitted and
release the manufacturer from any war-
ranty and liability.
SAFETY REGULATIONS
4. Safety
Read this operating and installation
guide carefully and heed the safety
information for installation, start-up,
servicing and general work on the unit.
Keep this operating manual in a safe
place and readily available at all times.
The safety instructions, warnings, com-
ments and directions described in these
operating instructions must always be
observed.
The specifications stated in this docu-
ment may not be modified.
Non-observance of these safety ins-
tructions, warnings, comments and
directions can result in physical injury or
damage to the compact ventilation unit.
We recommend purchasing a mainte-
nance contract to ensure that the unit
is inspected and maintained at regular
intervals. Your supplier can provide you
with the addresses of approved specia-
lists/installers in your area.
SYMBOLS USED The following safety symbols indicate
text passages that warn against dangers
and sources of danger. Please familiari-
se yourself with these symbols!
Caution/Important information!
Caution! The non-observance of
this warning can lead to injury
or danger to life and limb and/
or damage to the unit.
Caution - dangerous electrical
voltage! The non-observance of
this warning can lead to injury
or danger to life and limb.

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 9
USER GENERALSPECIALIST PERSONNEL
The national and local regu-
lations must be observed for
installation and setup. The unit
must be installed only in compliance
with the national installation regulations.
Installation shall be performed in
accordance with the general, locally
valid construction, safety and installati-
on regulations of the appropriate local
authority or of the water and electricity
company and other institutions.
The unit may be installed only in frost-
free and dry rooms. The room tempe-
rature in the set-up room must have
a continuous temperature between a
minimum of +5 °C and a maximum of
+40 °C.
The unit is intended for free-standing in-
stallation or wall mounting and may only
be set up when there is suitable load-
bearing floor or wall construction. No
vibrations must be allowed to affect the
unit. A suitable water drain with effective
drain trap (siphon) must be provided for
discharging condensate water accumu-
lated during operation of the unit.
Installation work for the water, heating
and Condensation connectors may only
be performed by a professional.
Proper installation is essential for ensu-
ring the water-tightness and effective-
ness of the condensate discharge line
and in order to prevent damage to the
building. The condensate drainage has to
be checked for operability by means of
an on-site inspection prior to initial star-
tup and after any servicing work. During
manual transport take care that only
reasonable human lifting and carrying
forces are used.
System components of the ventilation
system, such as air lines, that are ins-
talled in potentially unheated areas must
be suitably insulated to prevent heat
loss or Build-up of condensation (where
temperatures fall below the dew point).
Outdoor and exhaust air must always be
insulated
The locally-applicable construction and
fire prevention provisions, regulations
and standards must be adhered to. Ap-
propriate suitable measures for erection
of the unit, e.g. the installation of fire
dampers in air pipes etc., may have to
be taken.
Take into consideration the ambient
influences and do not install the venti-
lation unit in the vicinity of combustible
liquids or gases, in swimming pools
or in areas subject to the influence of
chemicals.
SETTING UP THE UNIT

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P ... PAGE 10
USER GENERALSPECIALIST PERSONNEL
• Warning: dangerous electrical
voltages!
• Failure to observe this risk
can lead to death, injury or
damage to property.
• Before carrying out any work on live
parts, the unit must always be dis-
connected completely from the power
supply (all poles) and secured against
being switched back on.
Work carried out on electrical connec-
tions and electrical components of the
unit and its accessories may be carried
out only by authorised electricians in
compliance with the applicable law,
requirements, standards and directives.
Before opening the unit and
when carrying out work on the
unit e.g. maintenance work and
repairs, the unit must be isolated from
the mains (all poles disconnected) and
secured against being switched back on
for the duration of the work.
The LG 500 P compact ventilation unit
is designed for a 230 V/50 Hz power
supply. The unit is not designed for con-
nection to a 400 V/50 Hz, three-phase
supply.
Potentially unsafe operations
are prohibited. To ensure safe
operation, never remove or
bypass safety devices.
The electrical systems of the unit,
including their warning and protective
functions, shall be regularly checked
for perfect operation. The unit must be
shut down immediately in the event of
malfunctions or defects such as loose
connections or overheated cables.
Only original fuses with the prescribed
rated current and dimensions may be
used.
Damaged or faulty power supply cables
to the unit must be repaired immedia-
tely, to avert potential danger. The unit
may not be operated unless safe opera-
tional conditions have been restored.
Fault finding and immediate remedia-
tion of electrical defects and malfunc-
tions shall be carried out by authorised
electricians only. All protective systems
must be checked (e.g. earth resistance
etc.) after completion of electrical work
on the unit. Details see Chapter 14 „Elec-
trical connetcion“, page 39.
ELECTRICAL CONNECTION WORK

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 11
USER GENERALSPECIALIST PERSONNEL
Operation of the ventilation unit
is only permitted if all required
connections in conjunction
with the provided installed components,
such as sound absorbers etc., have been
properly established.
Upon the occurrence of any
defects or damage that are
able to injure people or damage
property, the system has to be put out of
operation immediately. Further opera-
tion must be effectively prevented until
the unit is completely repaired!
Where fault messages or damage occur,
the unit must be immediately switched
off and disconnected from the mains.
When opening the front covers or
removing cover plates, act in a safety-
conscious manner and be aware of
the risks. Every working method that
impairs safety is prohibited.
Operation of the unit is only permitted
with a connected air line or installed
system components, such as sound
absorbers, with a minimum line length
of 1000 mm to ensure that the fans or
electrical components, for example,
cannot be touched by hand.
The ventilation unit must be operated
only in compliance with the project
documents. These must comply with the
equipment and product safety act and
with the relevant applicable stipulations
of the EC directives and standards.
Never operate the ventilation unit wit-
hout installed air filters. The air filters
must be checked or replaced regularly
for contamination and damage and
cleaned or replaced if necessary. Air
filters must be replaced at least every
six months or when a corresponding
message is displayed on the control unit.
Use only genuine spare filters.
If the unit has not been in service for a
longer time, for hygienic reasons the air
filters have to be replaced before putting
it back into operation.
In case of simultaneous use of the ven-
tilation unit with fireplaces consuming
indoor air, the applicable safety instruc-
tions and standards must be observed.
In the case of indoor air dependent
fireplaces the combustion air supply
has to be provided separately. See the
provisions on this topic under the point
“Provisions for operation with fireplaces”,
page 6.
Owing to their heavy loading and irre-
gular operation, extractor hoods must
not be integrated into the extract air or
exhaust air circuit of the ventilation unit.
Advice on this is provided under point
„Provisions for use with extractor hoods“,
page 6. Exhaust air extractor hoods must
be operated via separate air lines, with
provision for a suitable fresh air supply,
e.g. by opening windows, or via suitable
air filters in recirculated air mode.
OPERATION OF THE SYSTEM

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 12
USER GENERALSPECIALIST PERSONNEL
The compact ventilation unit LG 500 P
is used for the controlled mechanical
supply and extract air ventilation of
larger residential houses, as a centra-
lized unit for up to 5 homes, schools,
Doctor’s practices, offices and similar
applications.
The range of use extends fundamentally
to effective areas of 150 m² to approx.
400 m² that are designed as passive or
low energy structures, with an adjustab-
le air volume flow up to 550 m³/h.
The LG 500 P compact ventilation unit
comprises a compact, thermally insula-
ted enclosure of galvanised sheet steel,
RAL 9010 powder coated on the outside.
It is designed as a self-standing or wall-
mounted unit for frost-free rooms.
The ventilation unit includes a highly ef-
ficient heat recovery system with an air-
to-air counterflow heat exchanger made
of recyclable plastic, with a temperature
change rate of 84.7 %, an automatic,
100 % bypass, and energy-saving radial
fans driven by EC motors.
Also included are filters ODA ISO ePM2,5
65% for the outdoor air and filters ETA
ISO Coarse 90% for the extract air, both
easy to service via the inspection covers
on the front of the apparatus.
An external 3.5” colour touch screen
serves to program the integrated, wired
controller. As a standard, the LG 500
P comes with a volume flow constant
control and three adjustable ventilation
stages.
The LG 500 P compact ventilation unit
is optionally available with constant
pressure or Pichler System Optimiser
control. Optional CO2or VOC sensors
may be used to implement ventilation
controlled for optimum comfort.
USER GUIDE
5. Customer service
Please contact the installer of your
ventilation and air conditioning system
or contact us directly for any questions
relating to the LG 500 compact ventila-
tion unit supplied.
J. Pichler Gesellschaft m.b.H.
9021 KLAGENFURT
Karlweg 5
T+43 (0)463 32769
6. Ventilation unit design
• Ventilation unit with highly efficient
energy recovery
• Supply air and extract air fans with
energy-saving EC motors
• Volume flow control for constant air
volume flow, adjustable up to 550 m³/h
• Optional with constant pressure
control
• Needs-based air volume control via
CO2sensor
• Easy-to-use control unit
• Integrated 100 % bypass for bypassing
the heat exchanger in summer mode
• Selectable, automatically operating
frost protection switch for the heat
exchanger, optionally available with a
PTC low temperature preheater battery
• Filter monitoring integrated, upon at-
tainment of the time interval message
‘Filter change’ appears on the display.
• Simple filter change without tools
• Optional reheater battery for additional
raising of the room temperature
ADVANTAGES AND FEATURES

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 13
USER GENERALSPECIALIST PERSONNEL
7. Control unit
Product: PI-HMI
Type: 3,5“ touchscreen panel
The settings made on the ventilation unit
are performed via an operator control
unit. Control and operation of the venti-
lation unit is performed via the „PI-HMI“
control unit in-wall or on-wall mounting.
The touchscreen makes performing
settings simple. All important operating
data are displayed.
The control unit is normally
installed in the living area and
should be suitably positioned.
Thermal source areas, radiators, direct
sunlight etc. have to be avoided on ac-
count of their temperature influence!
PI-HMI is a touchscreen panel with
user-friendly graphical user interface
specially developed for controlling venti-
lation systems. The panel communicates
with the PI Air2 system via a Modbus
interface, ensuring easy installation.
The control unit is normally fitted in the
living area.
The following changes to the
ventilation unit can be set from
the PI-HMI control unit. When
the screensaver is enabled, tap the
touch display to open the start view.
Basic functions (such as fan speed,
temperature and configuration) can be
accessed from the start view.
• Time and weekday are shown on the
left in the topmost row on the display.
• The main menu can be accessed from
the icon in the top right.
• The alarm bell in the top left denotes
an active alarm.
• The house icon on the left in the middle
row enables an overview screen for
the ventilation unit to be accessed.
Temperatures, air quantities and filter
pressures can be checked.
• The desired temperature value is
shown in the middle row on the right.
Click this value to change it.
• The icons in the lower part of the start
view are for quick access to the indivi-
dual components. They can be changed
in the main menu under Settings –
Start view, and so can be different
from the figure.
HOME SCREEN

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USER GENERALSPECIALIST PERSONNEL
MAIN MENU Press this icon to return to the home
screen.
COMMUNICATION Here you can configure LAN settings.
WEEKLY PROGRAMM Here you can enter times and modes for
the built-in 7-day clock.
Then you can choose among three diffe-
rent modes:
• „Whole week“ – A ventilation setting for
the whole week
• „Daily program“ – For each day
different ventilation settings can be
parameterized
• „Weekday / weekend“ – Ventilation
settings on weekdays and weekends
are set
By pressing the button, the mode is
turned on or off .
1 Switching between the different modes
2 Mode
3 Weekday
4 Time to start and stop the system
5 Fan speed
6 Timer: A fan speed can be selected for
a certain period (e.g. in the morning).
Up to four timers can be programmed

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 15
USER GENERALSPECIALIST PERSONNEL
• Air-conditioning:
o General settings:
- Temperature control type
- Desired temperature value
- Minimum Supply air temperature
- Maximum Supply air temperature
o Heat exchanger settings
o Heating register settings
- Cooling register settings
• Ventilation settings: (can also be ac-
cessed from the start screen)
o General settings:
- Off: The fans are stopped and the
system is not running.
- Low: Low ventilation level is active.
- Medium: Medium ventilation level
is active.
- High: High ventilation level is
active.
- Service stop: The system can only
be restarted locally from the
control unit.
- Week program
- Calendar program:
Configuration via web server
o Supply air fan settings
o Exhaust air fan settings
• Filter settings:
o General settings
o Outdoor air filter: Reset filter time
o Extract air filter: Reset filter time
ALARMS Here you can view active alarms and
an alarm log. In case of an alarm, this
screen can also be accessed via the bell
icon on the home screen.
EXTENDED OPERATION If a different pattern of operation is
required for a short period of time, the
weekly program can be overridden. The
override period can last up to a week
at most. Once the period has elapsed,
the system returns to standard clock-
controlled operation.
COMPONENTS

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 16
USER GENERALSPECIALIST PERSONNEL
• Language: The PI-Air2 software sup-
ports the following languages
• Time & Date: Here you can set the time
and date for the system.
• Fire: When the fire alarm is active, this
speed is set for the fans (default = 0%).
• Screen saver: Here you can set the
screen saver timeout period.
• Factory settings: (PIN-requiered) Here
you can restore factory settings.
• Quick access: (PIN-requiered) Configu-
ration of the icons in the lower part of
the start view.
• Software version: Here you can view
information on software versions.
SETTINGS

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 17
USER GENERALSPECIALIST PERSONNEL
8. Messages / Faults
The bell icon in the top corner of the
start view flashes.
The operator control unit „PI-HMI“ will
display active alarms and an alarm log
in the ALARM submenu.
In case of an alarm, this screen can
also be accessed via the bell icon on the
home screen.
Pressing the “Reset” button acknow-
ledges all active alarms.
ALARM DISPLAY
When the integrated web server is used:
• Click Alarm in the User menu. The
following window opens:
WEB-SERVER
Clicking the “Turn off alarms” button
resets all active alarms

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 18
USER GENERALSPECIALIST PERSONNEL
These instructions relate ex-
clusively to regular inspection,
maintenance and replacement
of air filters by the user.
Check the condition of the air
filters regularly
Very dirty filters must be
replaced immediately, other-
wise depending on the level of
outdoor air pollution (every six months
as a minimum).
Only original replacement filters of the
specified quality class must be used in
observance of the filter quality class
specified.
9. Filter maintenance
MAINTENANCE INSTRUCTIONS
(AIR FILTER)
When the filter service time has elapsed
(factory setting: 4,400 hours), the control
unit signals (the bell icon start view
flashes) the need for a filter change
through the LED provided for this pur-
pose, which lights yellow continuously.
FILTER MESSAGE ON THE „PI-HMI“
Left-hand version:
1 Filter ODA ISO ePM2,5 65% (outdoor air),
optional filter ODA ISO ePM1 80%
2 Filter ETA ISO Coarse 90% (extract air),
optional filter ETA ISO Coarse 80%
1
2
The web server provides regular remin-
ders of filter maintenance (the life of a
filter is 4,400 hours).
FILTER MESSAGE ON THE WEB
SERVER

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 19
USER GENERALSPECIALIST PERSONNEL
When replacing the air filters,
avoid soiling the unit and its
components. Dirty air filters
must be immediately and suitably dis-
posed of.
It is advisable to package the air filters
in an airtight container immediately
after removal to avoid contamination of
the ventilation system and the unit.
Before carrying out any work
on live parts, the unit must
always be disconnected com-
pletely from the power supply (all poles)
and secured against being switched
back on!
1. Filter message on control unit
2. Undo the wing nuts on the housing
cover.
3. Open the front doors.
4. Before pulling the air filters (2) from
the unit, undo the filter slide rails (1),
in the filter tenter frames should be
loosened by pulling forwards. Only
then can the air filters (2) be gently
lifted out and replaced.
5. Extract the filters (2).
Never operate the ventilation
unit without using air filters for
the supply and exhaust air! If
ventilation units are shut down for long
periods, air filters should be replaced
before starting up again for hygienic
reasons!
6. Insert the new filter (2).
To prevent the level of filter
leakage from becoming too
high, ensure there is a secure
seal and sufficient clamping between the
air filter (2) and the filter slide rails (1)
when inserting the new filter.
7. When inserting the new filter, ensure
that it is installed correctly, and close
the filter stentering rails (1).
8. Close the housing cover and secure
it with the wing nuts. When replacing
the cover, ensure that it is completely
closed and that there is sufficient
seal-tightness between the front cover
and the unit housing.
Where can I order filters?
Use only original replacement filters of
the filter quality class specified.
FILTER CHANGING
CLEARING FILTER MESSAGES The filter times can be reset with the
“Reload” button in the main menu from
Unit components ĺ“Air filter” tab.
(1) Filter stentering rails
(2) Air filter
1
2
Symbol Designation Item no.:
Filter ODA
ISO ePM2,5 65%
(outdoor air)
40LG050090
Filter ODA
ISO ePM1 80%
(outdoor air)
40LG050110
Filter ETA
ISO Coarse 90%
(extract air)
40LG050100
Filter ETA
ISO Coarse 80%
(extract air)
40LG050120

OPERATING AND INSTALLATION INSTRUCTIONS LG 500 P PAGE 20
USER GENERALSPECIALIST PERSONNEL
SPECIALIST PERSONNEL - MOUNTING / INSTALLATION
10. Scope of Supply, Transport & Packing, Storage & Disposal
The scope of supply comprises the
following:
• the ventilation unit with „PI-HMI“
control unit.
• the operating and installation manual
• the wall-mounting strap
On delivery of the unit, check that the
type and serial number on the name-
plate correspond with the information on
the order and delivery documents, that
the equipment (including optional ac-
cessories) is complete, and that all parts
have been delivered in perfect condition.
Note: Any transport damage
and/or missing parts must be
reported immediately in writing
to the forwarder or supplier.
SCOPE OF SUPPLY
The ventilation unit LG 500 P is
delivered in transport packing. The
safety markings on the packaging must
be observed.
• Dimensions of the unit
(W x H x D): 915 x 855 x 655 mm
• Weight: approx. 75 kg without optional
accessories
To prevent transportation damage,
handle the compact LG 500 P ventilation
unit with care and secure it appropriate-
ly. Ensure that the unit is not damaged
by tipping or knocking over. Theunit
must not be transported by the electri-
cal connecting cable. Avoid knocks and
blows when transporting.
The valid safety and accident regulations
have to be complied with during trans-
port. During manual transport take care
that only reasonable human lifting and
carrying forces are used.
TRANSPORT AND PACKAGING
The unit must be stored in the packaging
in a suitable, dry, dust-free room and
protected against frost. Excessive sto-
rage periods, longer than a year, are to
be avoided.
STORAGE
Ensure the packaging material is dis-
posed of in an environmentally-friendly
manner. The packing materials have to
be disposed of in accordance with the
local stipulations, for example, wooden
pallets and cardboard packing have to
be recycled.
Units that are no longer in
working order have to be dis-
mantled and properly disposed
of by a specialized company via suitable
collection centres and in compliance
with 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).
WASTE DISPOSAL