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42,0426,0172,EN 009-21032016
Fronius Symo 3 - 8,2 kW
Fronius Eco
Installations instructions
Grid-connected inverter
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Contents
Installation location and position ................................................................................................................ 5
Explanation of safety symbols .............................................................................................................. 5
Reliability............................................................................................................................................... 5
Proper use ............................................................................................................................................ 6
Inverter installation location .................................................................................................................. 7
Explanation of symbols - installation position ....................................................................................... 8
General comments regarding inverter installation location................................................................... 9
Attaching the Wall Bracket......................................................................................................................... 10
Safety.................................................................................................................................................... 10
Selecting wall plugs and screws ........................................................................................................... 10
Recommended screws ......................................................................................................................... 10
Opening the inverter ............................................................................................................................. 10
Fixing the wall bracket to a wall ............................................................................................................ 11
Fitting the wall bracket to a mast or support ......................................................................................... 12
Fitting the wall bracket to metal supports.............................................................................................. 12
Do not warp or deform the wall bracket ................................................................................................ 12
Connecting the inverter to the public grid (AC) .......................................................................................... 13
Safety.................................................................................................................................................... 13
Monitoring the Grid ............................................................................................................................... 13
Type of AC cable .................................................................................................................................. 13
Connecting aluminum cables................................................................................................................ 13
AC terminals ......................................................................................................................................... 14
Cross-section of the AC cable .............................................................................................................. 14
Connecting the inverter to the public grid (AC)..................................................................................... 14
Maximum fuse rating on alternating current side.................................................................................. 16
Notes regarding inverters with single and multiple MPP trackers.............................................................. 17
Inverter with single MPP tracker ........................................................................................................... 17
Inverter with multiple MPP trackers ...................................................................................................... 17
Connecting solar module strings to the inverter (DC) ................................................................................ 19
Safety.................................................................................................................................................... 19
General comments regarding solar modules........................................................................................19
DC terminals ......................................................................................................................................... 20
Connecting aluminum cables................................................................................................................ 20
Connecting solar module strings to the inverter (DC)........................................................................... 21
Data communication .................................................................................................................................. 24
Routing data communication cables..................................................................................................... 24
Clipping the Inverter onto the Wall Bracket................................................................................................ 26
Attaching the inverter to the wall bracket.............................................................................................. 26
Starting for the first time............................................................................................................................. 28
Starting the inverter for the first time..................................................................................................... 28
Notes regarding software updates ............................................................................................................. 30
Notes regarding software updates........................................................................................................ 30
USB Stick as a Data Logger and for Updating Inverter Software .............................................................. 31
USB stick as a data logger.................................................................................................................... 31
Data on the USB stick........................................................................................................................... 31
Data volume and storage capacity........................................................................................................ 32
Buffer memory ...................................................................................................................................... 32
Suitable USB flash drives ..................................................................................................................... 33
USB stick for updating the inverter software......................................................................................... 33
Remove USB stick................................................................................................................................ 34
Notes regarding maintenance.................................................................................................................... 35
Maintenance ......................................................................................................................................... 35
Cleaning................................................................................................................................................ 35
Serial Number Sticker for Customer Use................................................................................................... 36
Serial number sticker for customer use ................................................................................................ 36
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Installation location and position
Explanation of
safety symbols
If you see any of the symbols depicted in the "Safety rules" chapter, special care is required.
Reliability
DANGER! Indicates immediate and real danger. If it is not avoided, death or se-
rious injury will result.
WARNING! Indicates a potentially dangerous situation. Death or serious injury
may result if appropriate precautions are not taken.
CAUTION! Indicates a situation where damage or injury could occur. If it is not
avoided, minor injury and/or damage to property may result.
NOTE! Indicates a risk of flawed results and possible damage to the equipment.
IMPORTANT! Indicates tips for correct operation and other particularly useful information.
It does not indicate a potentially damaging or dangerous situation.
WARNING! Incorrect operation or poorly executed work can cause serious injury
or damage. Commissioning of the hybrid system may only be carried out by
trained personnel in accordance with the technical regulations. Read the installation and operating instructions before installing and commissioning the equipment.
WARNING! Shoddy workmanship can cause serious injury and material damage. Overvoltage protection must only ever be installed and connected by a qualified electrical engineer.
Follow the safety rules!
Make sure that both the AC side and the DC side of the inverter are de-energised
before carrying out any installation or connection work.
Fire prevention
CAUTION! Risk of damage to inverters and other live photovoltaic system com-
ponents due to poor or unprofessional installation.
Poor or unprofessional installation can cause overheating of cables and terminal
connections and result in arcs. These can cause heat damage, which in turn may
lead to fires.
Observe the following when connecting AC and DC cables:
- Tighten all terminals to the torque specified in the operating instructions
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Observe the manufacturer's connection, installation and operating instructions at all times.
To reduce the hazard potential to a minimum, perform all installation and connection work
carefully according to the instructions and regulations.
Refer to the device operating instructions / installation instructions for the tightening torques to be used at the relevant terminal connections.
Proper use The solar inverter is intended exclusively to convert direct current from solar modules into
alternating current and to feed this into the public grid.
Utilisation not in accordance with the intended purpose comprises:
- utilisation for any other purpose or in any other manner
- making any modifications to the inverter that have not been expressly approved by
Fronius
- the installation of parts that are not distributed or expressly approved by Fronius.
Fronius shall not be liable for any damage resulting from such action.
No warranty claims will be entertained.
Proper use includes:
- carefully reading and obeying all the instructions and all the safety and danger notices
in the operating instructions
- performing all stipulated inspection and maintenance work
- installation as specified in the operating instructions
When designing the photovoltaic system, ensure that all of its components are operated
within their permitted operating ranges at all times.
Observe all the measures recommended by the solar module manufacturer to ensure the
lasting maintenance of the properties of the solar module.
Obey the regulations of the energy supply company regarding feeding energy into the grid.
- Tighten all grounding terminals (PE /
GND), including free ones, to the torque
specified in the operating instructions
- Do not overload cables
- Check cables for damage and verify that
they are laid correctly
- Take note of the safety instructions, operating instructions and any local connection regulations
Using fastening screws, always screw the inverter firmly to the wall bracket to the torque
specified in the operating instructions.
Ensure that the fastening screws are tight before starting the inverter!
NOTE! Fronius will not accept any costs associated with production downtimes,
installer costs, etc., that may arise as the result of a detected arc and its consequences.
Fronius accepts no liability for fires that can occur despite the presence of the integrated arc detection/extinguishing system (e.g. fires caused by a parallel arc).
NOTE! After an arc has been detected, the entire photovoltaic system must be
checked for possible damage before resetting the inverter.
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Inverter installation location
The inverter is suitable for installation indoors.
The inverter is suitable for installation outdoors.
Its IP 65 degree of protection means that the inverter is resistant to water
jets from any direction and can also be used in damp environments.
In order to minimise the heating up of the inverter, do not expose it to direct insolation. Install the inverter in a protected location, e.g. in the vicinity of the solar modules or beneath the eaves.
U
DCmax
at an altitude of:
0 to 2000 m = 1000 V
2000 to 2500 m = 900 V
2500 to 3000 m = 815 V
3000 to 3400 m = 750 V
IMPORTANT! The inverter must not be installed or used at altitudes
above 3400 m.
Do not install the inverter in:
- areas where ammonia, corrosive vapours, acids or salts are present
(e.g. fertiliser stores, ventilation openings from cattle sheds, chemical plants, tanneries, etc.)
As the inverter generates low levels of noise under certain operating conditions, it should not be installed close to living areas.
Do not install the inverter in:
- places where there is an increased risk of damage from farm ani-
mals (horses, cattle, sheep, pigs, etc.)
- stables or adjoining areas
- storage areas for hay, straw, chaff, animal feed, fertilisers, etc.
All inverters are design to be dust-tight. However, in areas with a heavy
build-up of dust, the thermal efficiency may still be impaired by dust forming on the cooling surfaces. Regular cleaning is necessary in such situations. It is therefore not recommended to mount the device in rooms or
areas in which a strong formation of dust is expected.
Do not install the inverter in:
- greenhouses
- storage or processing areas for fruit, vegetables or winegrowing
products
- places used to prepare grain, green fodder or animal feeds
IP 65
2000 m
2000 m
2500 m
UDCmax =
1000 V
U
DCmax =
900 V
3000 m
2500 m
3000 m
3400 m
UDCmax =
815 V
U
DCmax =
750 V
> 3400 m
NH
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Explanation of
symbols - installation position
The inverter is designed to be installed vertically on a vertical wall or pillar.
The inverter is suitable for horizontal installation.
The inverter is suitable for installation on a sloping surface.
Do not install the inverter on a sloping surface with its connection sockets
facing upwards.
Do not install the inverter at an angle on a vertical wall or pillar.
Do not install the inverter horizontally on a vertical wall or pillar.
Do not install the inverter on a vertical wall or pillar with its connection
sockets facing upwards.
Do not install the inverter such that it overhangs with its connection sockets facing upwards.
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General comments regarding
inverter installation location
The following criteria should be taken into account when choosing a location for the inverter:
Do not install the inverter such that it overhangs with its connection sockets facing downwards.
Do not install the inverter on the ceiling.
Install only on a solid surface
Max. ambient temperatures:
-25 °C/+60 °C
Relative humidity:
0 - 100%
The airflow within the inverter is from the
left to the top (cold air taken in from the
left, hot air dissipated out of the top).
If the inverter is installed in a switch cabinet or a similar sealed area, then forced-air ventilation must be provided to ensure adequate heat dissipation.
If the inverter is to be installed on the outer wall of a cattle shed, maintain a minimum allround clearance of 2 m between the inverter and all ventilation and other openings in the
building.
The installation location must not be exposed to ammonia, corrosive vapours, salts or acids.
200 mm
100 mm
150 mm
-25 °C - +60 °C
0 - 100 %
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Attaching the Wall Bracket
Safety
Selecting wall
plugs and screws
Recommended
screws
To install the inverter, the manufacturer recommends the use of steel or aluminium screws
with a diameter of 6 - 8 mm.
Opening the inverter
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WARNING! An electric shock can be fatal. Danger due to residual voltage in capacitors. Wait for the capacitors to discharge. The discharge time is five minutes.
CAUTION! Risk of damage to the inverter from dirt or water on the terminals and
contacts of the connection area.
- When drilling, ensure that terminals and contacts in the connection area do
not become dirty or wet.
- Without a power stage set, the wall bracket does not conform to the protection class of the inverter as a whole and so must not be installed without the
power stage set.
The wall bracket should be protected from dirt and moisture during installation.
NOTE! Degree of protection IP 65 is only applicable if
- the inverter is permanently attached to the wall bracket with screws
- the cover for the data communication area is permanently attached to the inverter with screws.
Degree of protection IP 20 applies to the wall bracket with no inverter.
IMPORTANT! Different fixings may be required to fit the wall bracket depending on the
type of underlying surface. Fixings are therefore not included in the scope of supply of the
inverter. The installer is responsible for selecting the right type of fixing.
WARNING! An inadequate ground conductor connection can cause serious injury or damage. The housing screws provide a suitable ground conductor connection for grounding the housing and must NOT be replaced by any other screws
that do not provide a reliable ground conductor connection.
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Fixing the wall
bracket to a wall
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Tip: Install the inverter such that its display is at eye level
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NOTE! When mounting the wall
bracket on the wall, ensure that
the wall bracket is not warped or
deformed.
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Fitting the wall
bracket to a mast
or support
When installing the inverter on a mast or
support, Fronius recommends the "Pole
Clamp" kit from Rittal GmbH (order no. SZ
2584.000).
This kit enables the inverter to be installed
on round or rectangular masts with the following diameters: from 40 to 190 mm
(round mast), from 50 to 150 mm (rectangular mast)
Fitting the wall
bracket to metal
supports
The wall bracket must be fastened at a minimum of four points.
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Do not warp or
deform the wall
bracket
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NOTE! When fitting the wall bracket to the wall, ensure that the wall bracket does
not become warped or deformed.
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