FRO­NIUS Eco User manual

Installation
Instructions
Fronius Symo 10 - 20 kW
Fronius Eco
42,0426,0175,EN 029-09082023
EN Installation Instructions

Contents
Installation location and position 5
Explanation of safety notices 5
Safety 5
Proper use/intended purpose 6
Choice of location 7
Installation position 8
General comments regarding choice of location 9
Attaching the Mounting Bracket 10
Safety 10
Selecting wall plugs and screws 10
Recommended screws 10
Opening the inverter 10
Fitting the mounting bracket to a wall 12
Installing the mounting bracket on a mast or beam 12
Fitting the mounting bracket to metal supports 13
Do not warp or deform the mounting bracket 13
Connecting the inverter to the public grid (AC side) 14
Safety 14
Monitoring the grid 14
Type of AC cable 14
Preparing the aluminium cables for connection 14
AC terminals 15
Cross section of the AC cable 16
Connecting the inverter to the public grid (AC) 16
Maximum fuse rating on alternating current side 18
String fuses 20
Fronius Eco - string fuses 20
Connection variants on multi-MPP and single-MPP tracker inverters 22
General 22
Multi MPP tracker - Fronius Symo -M inverter 22
Single MPP tracker - Fronius Eco inverter 25
Connecting solar module strings to the inverter 27
Safety 27
General comments regarding PV modules 28
DC terminals 28
Connecting aluminium cables 29
Solar module strings - checking the polarity and voltage 29
Connecting the solar module strings to the inverter 30
Data communication 33
Routing data communication cables 33
Installing the Datamanager in the inverter 33
Attaching the inverter to the mounting bracket 36
Attaching the inverter to the mounting bracket 36
Attaching the metall bracket 39
Starting for the first time 40
Starting the inverter for the first time 40
Notes regarding software updates 43
Notes regarding software updates 43
USB Stick as a Data Logger and for Updating Inverter Software 44
USB flash drive as a datalogger 44
Data on the USB flash drive 44
Data volume and storage capacity 45
Buffer memory 46
Suitable USB flash drives 46
USB stick for updating the inverter software 47
Removing the USB flash drive 47
Notes regarding maintenance 48
Maintenance 48
Cleaning 48
Australian Conduits 49
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Tightly sealing the conduits 49
Seal conduits 49
Serial Number Sticker for Customer Use 50
Serial number sticker for customer use 50
DC SPD option 51
Overview of DC SPD option 51
Retrofitting the DC SPD‑S option to the Fronius Symo 51
Retrofitting the DC SPD‑M option to the Fronius Symo 52
Retrofitting the DC SPD‑S option to the Fronius Eco 54
Factory-installed DC SPD option wiring 56
Access the Basic menu 57
Settings in the Basic menu 58
DC-plug +- pair MC4 option 60
General 60
4

Installation location and position
Explanation of
safety notices DANGER!
Indicates immediate danger.
▶If not avoided, death or serious injury will result.
WARNING!
Indicates a potentially hazardous situation.
▶If not avoided, death or serious injury may result.
CAUTION!
Indicates a situation where damage or injury could occur.
▶If not avoided, minor injury and/or damage to property may result.
NOTE!
Indicates a risk of flawed results and possible damage to the equipment.
Safety WARNING!
Danger due to incorrect operation and incorrectly performed work.
This can result in serious injury and damage to property.
▶Only qualified personnel are authorised to commission your inverter and only
within the scope of the respective technical regulations.
▶Read the Installation and Operating Instructions before installing and com-
missioning the equipment.
WARNING!
Danger due to work that has been carried out incorrectly.
This may result in serious injury and damage to property.
▶Surge protective devices must only ever be installed and connected by a
qualified electrical installation engineer!
▶Follow the safety rules.
▶Ensure that both the AC side and the DC side of the inverter are de-ener-
gised before carrying out any installation and connection work.
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Fire prevention
CAUTION!
Danger due to poor or unprofessional installation.
This may result in damage to inverters and other live photovoltaic system com-
ponents.
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
▶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 mounting
bracket to the torque specified in the Operating Instructions.
▶Ensure that the fastening screws are tight before starting the inverter!
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 Installation Instructions for the tightening torques to be used
at the relevant terminal connections.
Proper use/
intended pur-
pose
The 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:
-Any use above and beyond this purpose
-Making any modifications to the inverter that have not been expressly ap-
proved by Fronius
-the installation of components that are not distributed or expressly ap-
proved by Fronius.
Fronius shall not be liable for any damage resulting from such action.
No warranty claims will be entertained.
Proper use also includes:
-Carefully reading and obeying all the instructions and all the safety and
danger notices in the Operating Instructions and Installation Instructions
-Performing all stipulated maintenance work
-Installation as specified in the Installation Instructions
When designing the photovoltaic system, ensure that all components are oper-
ated within their permitted operating ranges at all times.
Observe all the measures recommended by the solar module manufacturer to
ensure that the solar module retains its properties in the long term.
Obey the regulations of the power supply company regarding connection meth-
ods and energy fed into the grid.
6

Choice of loca-
tion
The inverter is suitable for indoor installation.
IP 66
The inverter is suitable for outdoor installation.
Because of its IP 66 protection class, the inverter is resistant to
water jets from any direction and can also be used in damp en-
vironments.
In order to minimise the heating up of the inverter, do not ex-
pose it to direct insolation. Install the inverter in a protected
location, e.g. in the vicinity of the solar modules or beneath the
eaves.
Fronius Symo:
UDCmax at an altitude of:
0 to 2000 m = 1000 V
2001 to 2500 m = 950 V
2501 to 3000 m = 900 V
3001 to 3400 m = 850 V
IMPORTANT! The inverter must not be installed or used at alti-
tudes above 3400 m.
Fronius Eco:
UDCmax at an altitude of:
0 to 2000 m = 1000 V
2001 to 2500 m = 950 V
IMPORTANT! The inverter must not be installed or used at alti-
tudes above 2500 m.
NH3
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.)
During certain operating phases the inverter may produce a
slight noise. For this reason it should not be installed in an occu-
pied living area.
Do not install the inverter in:
-Places where there is an increased risk of damage from farm
animals (horses, cattle, sheep, pigs, etc.)
-Stables or adjoining areas
-Storage areas for hay, straw, chaff, animal feed, fertilisers,
etc.
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All inverters are designed 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 clean-
ing is necessary in such situations. We therefore recommend not
installing the inverter in areas and environments with high dust
accumulation.
Do not install the inverter in:
-Greenhouses
-Storage or processing areas for fruit, vegetables or viticul-
ture products
-Areas used in the preparation of grain, green fodder or an-
imal feeds
Installation posi-
tion
The inverter is suitable for vertical installation on a vertical wall or
column.
The inverter is suitable for a horizontal installation position.
The inverter is suitable for installation on a sloping surface.
Do not install the inverter on a sloping surface with its connection
sockets at the top.
Do not install the inverter at an angle on a vertical wall or column.
Do not install the inverter horizontally on a vertical wall or pillar.
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Do not install the inverter on a vertical wall or pillar with its con-
nection sockets facing upwards.
Do not install the inverter overhanging with the connection sock-
ets at the top.
Do not install the inverter overhanging with the connection sock-
ets at the bottom.
Do not install the inverter on the ceiling.
General com-
ments regarding
choice of loca-
tion
Please note the following criteria when choosing a location for the inverter:
Install only on a solid, non-flammable surface
Max. ambient temperatures:
-40 °C / +60 °C
Relative humidity:
0-100%
The airflow within the inverter is
from the right to the top (cold air
taken in from the right, hot air dis-
sipated out of the top).
The exhaust air can reach a temper-
ature of 70 °C.
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 all-round 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.
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Attaching the Mounting Bracket
Safety WARNING!
Danger of residual voltage from capacitors.
This may result in an electric shock.
▶Wait for the capacitors to discharge. The discharge time is indicated on the
inverter.
CAUTION!
Danger due to dirt or water on the terminals and contacts of the inverter's con-
nection area.
This may result in damage to the inverter.
▶When drilling, ensure that terminals and contacts in the connection area do
not become dirty or wet.
▶The mounting bracket without the power stage set does not correspond to
the protection class of the entire inverter and must therefore not be exposed
to external weather influences over a longer period of time without protec-
tion. The mounting bracket is protected when the inverter is suspended in
the mounting bracket and firmly screwed to it.
▶The mounting bracket should be protected from dirt and moisture during in-
stallation.
IMPORTANT!
Degree of protection IP 66 is only applicable if
-the inverter is placed in the mounting bracket and permanently attached us-
ing screws，
-the cover for the data communication area is permanently attached to the
inverter with screws.
Degree of protection IP 20 applies to the mounting bracket with no inverter.
Selecting wall
plugs and screws
Important! Different fixings may be required to fit the mounting bracket depend-
ing 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.
Recommended
screws
To install the inverter, we recommend the use of steel or aluminium screws with a
diameter of 6 - 8 mm.
Opening the in-
verter WARNING!
Danger from inadequate ground conductor connection.
This can result in serious injury and damage to property.
▶The housing screws provide a suitable ground conductor connection for
earthing the housing and must NOT be replaced by any other screws that do
not provide a reliable ground conductor connection.
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