Fronius Ohmpilot Operating Instruction

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Fronius Ohmpilot

Operating Instructions

/ Battery Charging Systems / Welding Technology / Solar Electronics

Accessories

FIND YOUR

OPERATING MANUALS

www.fronius.com/ohmpilot-manuals

FIND YOUR

OPERATING MANUALS

42,0410,2141,EN 001-14062017

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Dear Reader,

We would like to thank you for the trust you have placed in us and congratulate you on purchasing this high-quality Fronius product. These instructions will help you to familiarise yourself with the product. By reading the instructions carefully, you will learn about the diverse possibilities offered by your Fronius product. Only by doing so will you be

able to make the best possible use of its benets.

Please also observe the safety rules and thereby ensure a higher level of safety at the location where the product is being used. Careful handling of your product will support its quality and reliability over its long service life. These are key prerequisites for outstanding results.

NOTE! Indicates a risk of awed results and possible damage to the equip- ment.

IMPORTANT! Indicates usage tips and other particularly useful information. It is not a signal word for a harmful or dangerous situation.

If you see any of the symbols depicted in the "Safety Rules" section, special care is required.

Introduction

Explanation of Safety Symbols

DANGER! Indicates an imminent danger. If not avoided, death or serious

injury will result.

WARNING! Indicates a possibly dangerous situation. If not avoided, death or

serious injury may result.

CAUTION! Indicates a possibly harmful situation. If not avoided, minor injury and/or damage to property may result.

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Contents

Safety Rules .................................................................................................................................................... 7

General Remarks ........................................................................................................................................ 7

Environmental Conditions ........................................................................................................................... 7

Choice of Location....................................................................................................................................... 8

Explanation of Symbols - Installation Position............................................................................................. 9

Choice of Location - General Remarks ..................................................................................................... 10

Qualied Personnel ................................................................................................................................... 11

EMC Measures.......................................................................................................................................... 11

Final Disposal ............................................................................................................................................ 11

Data Back-Up ............................................................................................................................................ 11

Copyright ................................................................................................................................................... 11

General Remarks ........................................................................................................................................... 12

Utilisation in Accordance with "Intended Purpose" .................................................................................... 12

Warning Notices on the Device ................................................................................................................ 14

Wall Mounting ................................................................................................................................................. 15

Safety ........................................................................................................................................................ 15

Selecting Wall Plugs and Screws .............................................................................................................. 15

Recommended Screws ............................................................................................................................. 15

Installation Instructions .............................................................................................................................. 15

Fronius Smart Meter ....................................................................................................................................... 16

Integrating the Fronius Smart Meter.......................................................................................................... 16

Indications/Controls on the Device ................................................................................................................. 17

Selection of Heater ......................................................................................................................................... 18

1-Phase Heater ......................................................................................................................................... 18

3-Phase Heater ......................................................................................................................................... 18

Example for Calculation of Charging Time ................................................................................................ 18

Wiring Diagram ............................................................................................................................................... 19

Stripping Lengths ...................................................................................................................................... 20

Electrical Connection................................................................................................................................. 20

Opening the Ohmpilot ............................................................................................................................... 20

Application Example 1: 1-Phase Heating Element up to 3 kW ....................................................................... 21

Application Example 2: 3-Phase Heating Element 900 W up to 9 kW ........................................................... 23

Application Example 3: 1-Phase Heating Element up to 3 kW with Heat Pump Control ................................ 25

Application Example 4: 1-Phase Heating Element up to 3 kW and External Source (e.g. gas-red heating) 28

Application Example 5: Two Heating Elements - 3-Phase and 1-Phase ........................................................ 31

Application Example 6: Two 3-Phase Heating Elements up to 9 kW ............................................................. 34

Establishing the Data Connection .................................................................................................................. 37

Possible Communication Channels........................................................................................................... 37

Establishing a Connection via Modbus RTU ............................................................................................. 38

Establishing a Connection via LAN ........................................................................................................... 39

Establishing a Connection via WLAN ........................................................................................................ 40

Status Indication on Web Interface ................................................................................................................42

Optional Settings ............................................................................................................................................ 43

Manual Setting HEATER 1 ........................................................................................................................ 43

Activating Legionella Prevention ............................................................................................................... 43

Adapting the Day Curve ............................................................................................................................ 44

Temperature Limitation .............................................................................................................................. 44

Error List ......................................................................................................................................................... 45

Technical Data ................................................................................................................................................ 30

Input Data .................................................................................................................................................. 47

Interfaces................................................................................................................................................... 47

Output Data ............................................................................................................................................... 47

General Data ............................................................................................................................................. 47

Warranty Terms and Conditions, Disposal ..................................................................................................... 48

Fronius Manufacturer's Warranty ..............................................................................................................48

Final Disposal ............................................................................................................................................ 48

Applicable Standards and Guidelines ....................................................................................................... 48

Fronius Worldwide

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The device has been manufactured in accordance with the state of the art and the recognised safety rules. However, incorrect operation or misuse may result in:

- Injury or death to the operator or third parties

- Damage to the device and other property of the operator

- Inefcient operation of the device

All persons involved in commissioning, maintaining and servicing the device must:

- Be suitably qualied

- Have knowledge of and experience in dealing with electrical installations

- Read and follow these operating instructions carefully

The operating instructions must be kept at the location where the device is being used at all times. In addition to the operating instructions, the generally applicable and local regulations on accident prevention and environmental protection must be observed.

All safety and danger notices on the device:

- Must be in a legible state

- Must not be damaged

- Must not be removed

- Must not be covered, pasted or painted over

The heatsink can reach high temperatures.

Only operate the device when all protection devices are fully functional. If the protection devices are not fully functional, this may result in:

- Injury or death to the operator or third parties

- Damage to the device and other property of the operator

- Inefcient operation of the device

Any safety devices that are not functioning properly must be repaired by a

suitably qualied technician before the device is switched on.

Never bypass or disable protection devices.

For the location of the safety and danger notices on the device, refer to the "General Remarks" section in the operating instructions for the device.

Before switching on the device, rectify any faults that could compromise safety.

This is for your personal safety!

Operating or storing the device outside the specied area is regarded as not

complying with the intended purpose. The manufacturer shall not be liable for any damage or loss resulting from this.

For exact information on permitted environmental conditions, please refer to the "Technical Data" in the operating instructions.

Environmental Conditions

Safety Rules

General Remarks

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Choice of Location

The Ohmpilot is suitable for installation indoors.

Do not install the Ohmpilot outdoors.

The Ohmpilot corresponds to protection class IP 54 and is protected against spray water from all sides.

In order to keep warming of the Ohmpilot to a minimum, do not expose it to direct sunlight. Install the Ohmpilot in a protected position. The Ohmpilot must only be installed and operated at an ambient temperature of 0-40°C.

IMPORTANT!The Ohmpilot must not be installed or used at altitudes above 2000 m.

Do not install the Ohmpilot in:

- Areas where ammonia, corrosive vapours, acids or salts are present (e.g. fertiliser stores, ventilation openings from cattle sheds, chemical

plants, tanneries, etc.)

Do not install the Ohmpilot 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.

In principle, the Ohmpilot is designed to be dust-tight. However, in areas with high dust accumulation, the cooling surfaces may collect dust and this may impair the thermal performance. In such cases, regular cleaning is required. Consequently, we do not recommend installing the Ohmpilot in places and environments with strong dust formation.

Do not install the Ohmpilot in:

- Greenhouses

- Storage or processing areas for fruit, vegetables or winegrowing products

- Places used to prepare grain, green fodder or animal feeds

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Explanation of Symbols Installation Position

The Ohmpilot is designed to be installed vertically on a vertical wall.

Do not install the Ohmpilot horizontally.

Do not install the Ohmpilot on a sloping surface.

Do not install the Ohmpilot on a sloping surface with its connection sockets facing upwards.

Do not install the Ohmpilot at an angle on a vertical wall.

Do not install the Ohmpilot horizontally on a vertical wall.

Do not install the Ohmpilot such its connection sockets are facing upwards.

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Do not install the Ohmpilot such that it overhangs with its connection sockets facing upwards.

Do not install the Ohmpilot such that it overhangs with its connection sockets facing downwards.

The following criteria should be taken into account when choosing a location for the Ohmpilot:

Install only on a solid surface.

If the Ohmpilot is installed in an enclosed space, then forced-air ventilation must be provided to ensure adequate heat dissipation.

IMPORTANT! The maximum cable length from the output of the Ohmpilot to the load

(heating element) must not exceed 5 m.

Max. ambient temperatures: 0 °C / +40 °C

Relative humidity: 0 - 99%

The direction of air ow within the

Ohmpilot is from the bottom to the top

Do not install the Ohmpilot on the ceiling.

Choice of Location General Remarks

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The information on servicing contained in these operating instructions is

only intended for qualied personnel. An electric shock can be fatal. Do not

carry out any activities other than those listed in the documentation. This also

applies even if you are qualied to do so.

All cables and leads must be secure, undamaged, insulated and adequately dimensioned. Arrange for loose connections, burnt, damaged or undersized cables and leads to be repaired by an authorised specialist company immediately.

Maintenance and repair work must only be carried out by an authorised specialist company.

With parts sourced from third parties, it is not guaranteed that they have

been constructed and manufactured in accordance with the specications

and so as to comply with the safety requirements. Only use original spare

parts (also applies to standard parts). Do not carry out any modications, alterations, etc. to the device without the

manufacturer's consent.

Components that are not in perfect condition must be replaced immediately.

In certain cases, even though a device complies with the standard limit values for emissions, it may affect the application area for which it was designed (e.g. when there is sensitive equipment at the same location, or if the site

where the device is installed is close to either radio or television receivers).

If this is the case, then the operator is obliged to take appropriate action to rectify the situation.

In accordance with European Directive 2002/96/EC on waste electrical and electronic equipment and its implementation in national law, used electrical devices must be collected separately and recycled in an environmentally responsible manner. Ensure that you return your used device to your dealer or obtain information regarding a local, authorised collection and disposal system. Failure to comply with this EU Directive may result in a negative impact on the environment and your health!

The user is responsible for the data back-up of any changes made from the factory settings. The manufacturer shall not be liable in the event that personal settings are deleted.

Text and images correspond to the technical level at the time of going to press. We reserve the right to make changes. The content of the operating instructions shall not give rise to any claims on the part of the purchaser. We are grateful for any suggestions for improvement and notices of errors in the operating instructions.

Qualied

Personnel

EMC Measures

Disposal

Data Back-Up

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With its "24 hours of sun" vision, Fronius is aiming to offer its customers solutions for generating, storing, distributing and using energy in an intelligent and cost efcient manner. The use of surplus energy for hot water preparation constitutes a simple option, with low investment costs, for storing electricity in the form of heat and using it at a time of the customer’s choosing.

The Fronius Ohmpilot, which carries out precisely this task, is therefore an ideal addition to the Fronius product portfolio in the area of energy management and a further step towards "24 hours of sun".

The solution as a whole consists of the following components:

• Fronius Symo / Galvo / Eco or Primo inverter (from Fronius Datamanager 2.0

software version 3.8.1-x onwards)

• Fronius Smart Meter

• Fronius Ohmpilot

• Resistive loads (e.g. boiler with heating element)

NOTE! With the Fronius Datamanager Box 2.0, it is also possible to use any

other generation source (CHP unit, non-Fronius inverter, etc.). However, as the gures for power produced and consumption are not available for these

options, they cannot be displayed in Solarweb.

The Ohmpilot is a separate device that can control the surplus power from the photovoltaic system in a continuously variable manner, using pulse width modulation, for a phase

between 0 and 100% (or 0 and 3 kW). Moreover, the Ohmpilot has two additional outputs

for switching further phases. As a result, heating elements with an output of between 300 W and 9 kW can be controlled in a continuously variable manner:

A heating element with up to 3 kW output can be controlled in a continuously variable manner using one phase.

In the case of a heating element with 9 kW output, the surplus power of 0 - 3 kW is controlled in a continuously variable manner in phase 1. If more power is available, the Ohmpilot activates phase 2 in addition and phase 1 can again control the surplus in a continuously variable manner between 3 - 6 kW. If the available power is greater than 6 kW, the Ohmpilot adds phase 3 and phase 1 again controls the surplus between 6 and 9 kW in a continuously variable manner.

General Remarks

Proper Use / Intended Purpose

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Other resistive loads such as infrared heaters, towel dryers, etc. can also be controlled.

IMPORTANT! In hard water areas, calcication of the heating element may occur, par- ticularly if the target temperatures are set to over 60 °C. We recommend a yearly inspection. To execute this, dismantle the heating element from the storage tank and remove

the limescale. Do not scratch the surface of the heating element (formation of corrosion).

Power range

0 - 3 kW

3 - 6 kW

6 - 9 kW

Phase 1

0 - 3 kW continuously variable

Phase 2

3 kW xed

Phase 3

3 kW xed

WARNING! No electronic thermostats may be used in the loads. The use of

electronic thermostats will lead to destruction of the Ohmpilot and/or the load. Mechanical temperature switches must be used.

WARNING! Only purely resistive loads may be connected. Connecting an

incorrect load (e.g. fan heater) will lead to destruction of the load.

0 - 3 kW continuously variable

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Warning notices and safety symbols are located on the left-hand side of the Ohmpilot. These warning notices and safety symbols must not be removed or painted over. The notices and symbols warn of incorrect operation that could result in serious injury and damage to property.

Risk of serious injury and property damage from incorrect operation

Dangerous electrical voltage

Wait for the capacitors to discharge.

Hot surface

Do not use the functions described here until you have fully read and understood the following documents:

- These operating instructions

- All the operating instructions for the system components of the photo voltaic system, especially the safety rules

Warning Notices on the Device

Safety symbols:

Text on the warning notices:

WARNING!

An electric shock can be fatal. Before opening the device, ensure that the input and out-

put sides are de-energised. Wait for the capacitors to discharge (15 seconds).

WARNING!

The device must not be covered and nothing may be hung over the device or the cables.

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Wall Mounting

NOTE! The IP 54 protection class only applies if the cover is rmly screwed to

the back.

IMPORTANT! Depending on the surface, different types of xings are required for mounting the Ohmpilot. The xings are therefore not included in the scope of supply for the Ohmpilot. The tter is personally responsible for selecting the correct xings. The

Ohmpilot must be mounted with four screws. Ensure that the screws are tight and that the wall is stable. .

To install the Ohmpilot, the manufacturer recommends the use of steel screws with a diameter of 4 - 6 mm.

Safety

Selecting Wall Plugs and Screws

Recommended Screws

Installation Instructions

CAUTION! Risk of damage to the Ohmpilot due to dirt or water on the termi-

nals and in the electronics. When drilling, ensure that the terminals and electronics do not become dirty or wet.

1 2

3 4

max. 3Nm

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How to connect the Fronius Smart Meter to the Fronius Datamanager 2.0:

Fronius Smart Meter

A Fronius Smart Meter is required for operation of the Ohmpilot, so that the surplus energy can be measured. For integration of the Fronius Smart Meter, an inverter with Datamanager 2.0 and software version V3.8.1-x or higher and/or a Datamanager Box

(from software version 3.8.1-x) is necessary. It must be congured on the Datamanager

whether the Fronius Smart Meter is installed at the feed-in point or in the consumption branch. The setting must be implemented on the webpage under the "Meter" tab for the Datamanager.

Further information on the Datamanager can be found in the "Fronius Datamanager 2.0" Operating Instructions

(1a) Meter position at feed-in point

The power and energy fed in are measured. Consumption is determined based on these values and the system data.

(1b) Meter position in consumption branch

The power and energy consumed are measured directly. The power and energy fed in are determined based on these values and the system data.

Integrating the Fronius Smart Meter

(1a)

(1b)

(1)

(1b)

Fronius Smart Meter

INPUT

OUTPUT

RS 485

DT/PE

Rx / x GND

A B C D

3 4 6 7 9 11

LOAD

XXX

Fronius

Datamanager

2.0

120 Ω

- D+ D-

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Indications/Controls on the Device

1x WPS 2x ACCESS POINT 3x BOOST

WPS (Wi-Fi Protected Setup) is opened

for 2 minutes or until successful pairing with the router. By pressing the WPS button the router, the WLAN password is transmitted to the Ohmpilot.

WLAN access point is activated for 30 minutes so that settings can be implemented on the Ohmpilot via the Fronius Solar web app.

Boost mode - dimmer level is activated for 4 hours at 100%, L2 and L3 are switched through. This may result in electricity being sourced from the grid.

Ohmpilot is returned to standard operating mode, boost mode, access point or WPS are deactivated.

No power supply to the Ohmpilot

The faster the ashing frequency, the

greater the heat output. At 0 W heat output

the LED ashes slowly, at full output it ashes quickly.

The output from the heating element is measured and it is detected whether a 1-phase or 3-phase heating element is connected. Target temperature undercut or legionella

prevention system active (full heat output).

No connection

WPS (Wi-Fi Protected Setup) open

WLAN access point open Connection with network

No error No connection to the inverter Temperature measurement faulty Heating element faulty Ohmpilot faulty Target temperature not reached

Press 1x

Press 2x

Press 3x

Press again

Unlit

Flashing green

Flashing green 2x

Steady green

Heater indication

Green LED

Unlit Flashing blue 1x Flashing blue 2x Steady blue

Connection indication LAN / WLAN

Blue LED

Unlit Flashing red 1x Flashing red 2x Flashing red 3x Flashing red 4x Flashing red 5x

Error indication

Red LED

A detailed description of the error is provided in Solar Web.

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Selection of Heater

- 0.3 to 3 kW

- Purely resistive load (no electronic temperature limiters, fans, etc.)

- 0.9 to 9 kW

- Equal load distribution on all 3 phases (e.g. 3 x 3 kW)

- If a mechanical temperature switch is being used, it must switch all 3 phases simultaneously.

- Purely resistive load (no electronic temperature limiters, fans, etc.)

- Neutral conductor must be implemented (this can generally also be retrotted)

NOTE! A mechanical temperature switch simplies commissioning and use. If

no mechanical temperature switch is available, a temperature sensor can also be connected to the Ohmpilot in order to limit the maximum temperature. (See

"Temperature limitation")

500-litre boiler, heater can be tted at the very bottom of the boiler, temperature spread

45 - 60 °C = 15 °C; 4.5 kW heater

Possible stored energy = 0.5 m³ x 1.16 kWh x 15 °C = 8.7 kWh

If the heater is fully activated, heating up takes approximately 2 hours (8.7 kWh / 4.5 kW)

NOTE! So that optimal use can be made of the surplus power and the hot wa-

ter is reheated quickly, the heater output should be adapted to the output of the photovoltaic system, e.g. 5 kWp => 4.5 kW heater.

1-Phase Heater:

3-Phase Heater:

Example for Calculation of Charging Time:

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Wiring Diagram

NC W NO OUT N

L1 L2 L2L3 N N L3 N

LAN

RS485

PT1000

D+ D- -

G B R

1 2 3

5 7

9 10

11 12

Green LED

Connection terminal for PT1000 Temperature sensor Spring balancer 0.2 - 1.5 mm

Blue LED

INPUT - grid supply 1x 230 V or 3x 230 V Spring balancer 1.5 - 1.5 mm

Red LED

Button

Ethernet RJ45, at least CAT5, screened

Modbus RTU (default address 40)

Spring balancer 0.2 - 1.5 mm

max. 1000 m, screened and twisted

OUTPUT - L2 heating element Spring balancer 1.5 - 2.5 mm

OUTPUT - L3 heating element Spring balancer 1.5 - 2.5 mm

Multifunctional relay output

(see application examples)

variable max. 13 A resistive load Spring balancer 1.5 - 2.5 mm

WARNING! If signal cables are connected, the individual wires must be bound together with a cable tie directly upstream of the terminal. This prevents any wire making contact with dangerous voltages if it works loose.

OUTPUT - heating element continuously adjustable up to 3 kW

NOTE! Phase and neutral conductors must not be mixed up. Residual cur rent-operated circuit breaker is triggered.

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Stripping length of terminals on power

stage set (L1, L2, etc.)

10 mm

8 mm

Stripping length of terminals on control

board (D+, D-, - and PT1000)

Stripping Lengths

Electrical Connection

Opening the Ohmpilot

IMPORTANT! Electrical connection work may only be carried out by a specialist.

IMPORTANT! The ground conductor connection must be perfectly installed and reliably

connected.

IMPORTANT! The Ohmpilot must be equipped with an overvoltage protection device of maximum B16 A and a residual-current circuit breaker on the grid side.

IMPORTANT! On the output side, it must be ensured that only purely resistive loads are connected.

IMPORTANT! The maximum cable length from the output of the Ohmpilot to the load

(heating element) must not exceed 5 m on EMC grounds.

IMPORTANT! The Ohmpilot must be protected against overvoltage from the grid.

IMPORTANT! When connecting a heating element, check the grounding of the boiler/

buffer and/or the heating system and, when setting the temperature on the heating element, observe the maximum permitted inlet water and hot water temperature.

IMPORTANT! The RS485 conductor should be designed as a data cable in order to prevent any mix-up with the grid conductor when connecting.

WARNING! An electric shock can be fatal. Danger from residual voltage in

capacitors. Wait for the capacitors to discharge. The discharge time is 15 seconds.

WARNING! An inadequate ground conductor connection can cause serious

injury or property damage.

WARNING! Risk of burns from the heatsink when open.

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L2 L2L3 N N L3 N

LAN

RS485

PT1000

D+D- -

G B R

NC W NO OUT

9 9

7 8

1 3 5 7

2 4 6 8

IMPORTANT! Plug & Play - With this application, no further settings are necessary following successful connection to the inverter.

1-Phase Heating Element up to 3 kW

Application Example 1

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INPUT - grid supply 1x 230 V Spring balancer 1.5 - 2.5 mm

NOTE! Phase and neutral conductors must not be mixed up. Residual current-operated circuit breaker is triggered.

OUTPUT up to 3 kW variable, max. 13 A resistive load Spring balancer 1.5 - 2.5 mm

Hot water boiler

PT1000 temperature sensor

Circuit breaker max. B16A

Ferrite (included in delivery)

External source (e.g. gas-red heating)

Heating element (max. 3 kW)

Residual-current circuit breaker

Functional Description

The Fronius Smart Meter records the current power at the feed-in point and transfers the data to the Datamanager. By controlling the Ohmpilot, the Datamanager adjusts any surplus energy that is available to zero. In detail, this takes place by continuously adjusting the heating element connected to the Ohmpilot.

This means that the surplus energy is used up by the heating element in a continuously variable manner.

If no temperature sensor is tted, an external source (e.g. gas-red heating) must be

used to ensure the minimum temperature is met.

As an alternative, the Ohmpilot can also ensure the minimum temperature. For this, a temperature sensor must be connected so that the Ohmpilot can measure the temperature. This may result in electricity being sourced from the grid.

The maximum temperature must be set on the heating element thermostat.

If the heating element does not have a thermostat, the Ohmpilot can also carry out this

task as an alternative (see "Optional Settings" section).

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3-Phase Heating Element 900 W up to 9 kW

Application Example 2

IMPORTANT! Plug & Play - With this application, no further settings are necessary fol-

lowing successful connection to the inverter.

L2 L2L3 N N L3 N

LAN

RS485

PT1000

D+D- -

G B R

NC W NOOUT

9 10

1 3 5 7

2 4 6 8

12345

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INPUT - grid supply 3x 230 V Spring balancer 1.5 - 2.5 mm

NOTE! Phase and neutral conductors must not be mixed up. Residual current-operated circuit breaker is triggered.

OUTPUT - L2 heating element

OUTPUT - L3 heating element

Hot water boiler

OUTPUT up to 3 kW variable, max. 13 A resistive load Spring balancer 1.5 - 2.5 mm

PT1000 temperature sensor

External source (e.g. gas-red heating)

Heating element (max. 9 kW)

Residual-current circuit breaker

Circuit breaker max. B16A

Ferrite (included in delivery)

Functional Description

This means that the surplus energy is consumed in a continuously variable manner with the heating element. Depending on the surplus power, the individual phases are switched on or off and the remaining power is consumed at L1. As a result, the heating element output is divided by three.

If no temperature sensor is tted, an external source (e.g. gas-red heating) must be

used to ensure the minimum temperature is met.

The maximum temperature must be set on the heating element thermostat.

If the heating element does not have a thermostat, the Ohmpilot can also carry out this

task as an alternative (see "Optional Settings" section).

NOTE! A heating element with realisation of a neutral conductor is required.

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1-Phase Heating Element up to 3kW with Heat Pump Control

Application Example 3

L2 L2L3 N N L3 N

LAN

RS485

PT1000

D+D- -

G B R

NC W NO OUT

8 9

1 3 5 7

2 4 6 8

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INPUT - grid supply 1x 230 V Spring balancer 1.5 - 2.5 mm

NOTE! Phase and neutral conductors must not be mixed up. Residual current-operated circuit breaker is triggered.

Multifunctional relay output

OUTPUT up to 3 kW variable, max. 13 A resistive load Spring balancer 1.5 - 2.5 mm

NOTE! The voltage must be at least 15 V and the current at least 2 mA, so that the relay contacts do not oxidise.

Hot water boiler

PT1000 temperature sensor

Heat pump with SG Ready control input

Heating element (max. 3 kW)

Residual-current circuit breaker

Circuit breaker max. B16A

Ferrite (included in delivery)

Functional Description

For activation, the heat pump must have a control input (e.g. SG Ready or DSO release). The heat pump can, for example, be switched from operating status 2 (normal operation) to operating status 3 (increased operation) as a result of activation of heat pump input 2

by the relay. However, the heat pump can also be switched from operating status 1 (DSO

block) to operating status 2 (normal operation) as a result of activation of heat pump

input 1 by the relay.

A description and list of SG Ready heat pumps can be found at:

http://www.waermepumpe.de/waermepumpe/qualitaetssicherung/sg-ready-label/

Relatively small surpluses are consumed with the heating element in a continuously variable manner. From a certain surplus power, it makes sense to activate the heat pump, as

it is more efcient (e.g. COP for hot water preparation up to 53 °C = 2.5).

The optimal switching thresholds depend on:

- COP of the heat pump. The higher the temperature to which the hot water is heated, the lower the COP

- Electrical output of the heat pump

- Feed-in tariff and the costs for purchasing electricity

- Reduction of the heat pump’s start-up cycles = increase in service life of the heat pump

- Thermal losses from the heat pump and the pipes

If no temperature sensor is installed, the heat pump must ensure the minimum temperature is maintained. Alternatively, the Ohmpilot can also ensure the minimum temperature through activation of the heat pump. This may result in electricity being sourced from the grid.

The maximum temperature must be set on the heating element thermostat and on the

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1. The section "Establishing the Data Connection" describes how you can access the Ohmpilot website.

2. Under HEATER 2, select "SG Ready heat pump" as the load

3. Under the switch-on threshold, select "Feed-in" and enter the required power in Watts from which the heat pump should be switched on.

4. Under the switch-off threshold, select "Purchase" and "Feed-in" and enter the required power in Watts from which the heat pump should be switched off.

Example 1:

If you have selected "Purchase" under the switch-off threshold and entered a power of 500 W, the heat pump will be switched off as soon as the power being drawn from the grid exceeds 500 W.

Example 2:

If you have selected "Feed-in" under the switch-off threshold and entered a power of 500 W, the heat pump will be switched off as soon as the power being fed in is less than 500 W.

NOTE! The heat pump must be connected to the same DSO meter. Between the switch-on and switch-off thresholds, the self-consumption of the heat pump must also be taken into consideration. For example, if the heat pump consumes 3000 Watts of electricity and a hysteresis of 500 Watt must be taken into account, the switch-on threshold can be set to feed-in 3000 Watts and the switch-off threshold to purchase 500 Watts.

heat pump. If the heating element does not have a thermostat, the Ohmpilot can also

carry out this task as an alternative (see "Optional Settings" section).

NOTE! This function can also be combined with a 3-phase heating element.

Page 28

1-Phase Heating Element up to 3 kW and External source

Application Example 4

L2 L2L3 N N L3 N

LAN

RS485

PT1000

D+D- -

G B R

NC W NO OUT

1 2

8 9

1 3 5 7

2 4 6 8

Page 29

Functional Description

This means that the surplus energy is used up by the heating element in a continuously variable manner.

The temperature is measured by the Ohmpilot. If the temperature falls below the mini-

mum, then an external source (e.g. gas-red heating) will be activated until the minimum

temperature is reached again, so that the Ohmpilot only uses surplus energy and does not draw any energy from the grid.

The maximum temperature must be set on the heating element thermostat.

If the heating element does not have a thermostat, the Ohmpilot can also carry out this

task as an alternative (see "Optional Settings" section).

NOTE! The heating element is used for switching on and off the legionella prevention.

NOTE! This function can also be combined with a 3-phase heating element.

INPUT - grid supply 1x 230 V Spring balancer 1.5 - 2.5 mm

NOTE! Phase and neutral conductors must not be mixed up. Residual current-operated circuit breaker is triggered.

Multifunctional relay output

OUTPUT up to 3 kW variable, max. 13 A resistive load Spring balancer 1.5 - 2.5 mm

NOTE! The voltage must be at least 15 V and the current at least 2 mA, so that the relay contacts do not oxidise.

Hot water boiler

PT1000 temperature sensor

External source (e.g. gas-red heating)

Heating element (max. 9 kW)

Residual-current circuit breaker

Circuit breaker max. B16A

Ferrite (included in delivery)

Page 30

1. The section "Establishing the Data Connection" describes how you can access the Ohmpilot website.

2. Highlight the eld "Temperature sensor present"

3. Highlight the eld "Adapt day curve"

4. Under "Time from", enter the time from which the minimum temperature should be

adjusted, and the specic minimum temperature.

5. Under "Target temperature", enter the required temperature.

6. Under HEATER 2, select "Activate external source"

Example 1:

If you enter 6.00 am under "Time from" and select 45 °C as the temperature, the heating will operate from 6.00 am until such time as a temperature of 45 °C is reached. The

external source (e.g. gas-red heating) will only be activated if the temperature is below

the set value.

Page 31

Two Heating Elements - 3-Phase and 1-Phase

Application Example 5

L2 L2L3 N N L3 N

LAN

RS485

PT1000

D+D- -

G B R

NC W NOOUT

2 3

1 3 5 7

2 4 6 8

12345

Page 32

INPUT - grid supply 3x 230 V Spring balancer 1.5 - 2.5 mm

NOTE! Phase and neutral conductors must not be mixed up. Residual current-operated circuit breaker is triggered.

OUTPUT - L2 heating element

OUTPUT - L3 heating element

Multifunctional relay output

OUTPUT up to 3 kW variable, max. 13 A resistive load Spring balancer 1.5 - 2.5 mm

Hot water boiler

PT1000 temperature sensor

External source (e.g. gas-red heating)

Heating element 1 (max. 3 kW)

Buffer

Heating element 2 (max. 9 kW)

Residual-current circuit breaker

Circuit breaker max. B16A

Ferrite (included in delivery)

Functional Description

Many heating systems consist of a boiler and a buffer, with the central heating supplying the buffer and a control system charging the hot water boiler via a pump. As with thermal

photovoltaic systems, the Ohmpilot is also capable of heating the hot water boiler rst

and then the buffer, so that the maximum amount of photovoltaic surplus energy can be stored.

For this application, two heating elements are installed, with preference being given to

activation of the rst heating element (9). Only once the maximum temperature in the boiler (6) has been reached is the second heating element activated in a continuously

variable manner, so that the remaining energy can, for example, be stored in a buffer.

If no temperature sensor is connected to the Ohmpilot, after 30 minutes the Ohmpilot

attempts to output energy via the rst heating element once again. If a temperature sensor is present, the device switches back to the rst heating element as soon as a

temperature difference of 8 °C is reached (compared to the temperature measured prior

to switch-over).

This switching can also be used for layering in a boiler/buffer, so that the maximum temperature is reached in the top part of the boiler using minimal energy and the remaining energy is stored in the lower part of the boiler. By using layering in a storage tank, it is

also possible to store signicantly more energy, as a minimum temperature is normally

maintained in the top part of the boiler. This means that the temperature difference and therefore the amount of energy is rather small. In the lower part of the boiler, a high temperature difference of, for example, 50 °C can be used.

Both the rst and the second heating element can be 1-phase or 3-phase. For two

3-phase heating elements please refer to application example 6. If no temperature

Page 33

sensor is installed, an external source (e.g. gas-red heating) must ensure the minimum

temperature.

As an alternative, the Ohmpilot can also ensure the minimum temperature. This may result in electricity being sourced from the grid. The maximum temperature must be set on

the heating element thermostat. If heating element 1 (9) does not have a thermostat, the Ohmpilot can also carry out this task as an alternative (see "Optional settings" section). However, it is imperative that heating element 2 (11) has a thermostat.

NOTE! At no point can both heating elements be heated simultaneously.

1. The section "Establishing the Data Connection" describes how you can access the Ohmpilot website.

2. Under heater 1, select "manual" and "1 or 3-phase", as well as the power of the load.

3. Under HEATER 2, select "1 or 3-phase" as the load and the power of the load.

Page 34

L2 L2L3 N N L3 N

LAN

RS485

PT1000

D+D- -

G B R

NC W NO OUT

1 3 5 7

2 4 6 8

12345

Two 3-Phase Heating Elements up to 9 kW

Application Example 6

Page 35

INPUT - grid supply 3x 230 V Spring balancer 1.5 - 2.5 mm

NOTE! Phase and neutral conductors must not be mixed up. Residual current-operated circuit breaker is triggered.

OUTPUT - L2 heating element

OUTPUT - L3 heating element

Multifunctional relay output

OUTPUT up to 3 kW variable, max. 13 A resistive load Spring balancer 1.5 - 2.5 mm

Hot water boiler

Contactor switching

PT1000 temperature sensor

External source (e.g. gas-red heating)

Heating element 1 (max. 9 kW)

Buffer

Residual-current circuit breaker

Heating element 2 (max. 9 kW)

Circuit breaker max. B16A

Ferrite (included in delivery)

Functional Description

Many heating systems consist of a boiler and a buffer, with the central heating supplying the buffer and a control system charging the hot water boiler via a pump. As with thermal

photovoltaic systems, the Ohmpilot is also capable of heating the hot water boiler rst

and then the buffer, so that the maximum amount of photovoltaic surplus energy can be stored.

For this application, two heating elements are installed, with preference being given to

activation of the rst heating element (10). Only once the maximum temperature in the boiler (7) has been reached is the second heating element (12) activated in a contin-

uously variable manner, so that the remaining energy can, for example, be stored in a buffer.

If no temperature sensor is connected to the Ohmpilot, after 30 minutes the Ohmpilot

attempts to output energy via the rst heating element once again. If a temperature sensor is present, the device switches back to the rst heating element as soon as a

temperature difference of 8 °C is reached (compared to the temperature measured prior

to switch-over).

also possible to store signicantly more energy, as a minimum temperature is normally

The switching must be realised by an external contactor. If no temperature sensor is

Page 36

installed, an external source (e.g. gas-red heating) must ensure the minimum temperature.

As an alternative, the Ohmpilot can also ensure the minimum temperature. This may result in electricity being sourced from the grid.

The maximum temperature must be set on the heating element thermostat. If heating

element 1 (10) does not have a thermostat, the Ohmpilot can also carry out this task as an alternative (see "Optional settings" section). However, it is imperative that heating element 2 (12) has a thermostat.

NOTE! At no point can both heating elements be heated simultaneously.

1. The section "Establishing the Data Connection" describes how you can access the Ohmpilot website.

2. Under HEATER 2, select "3-phase" as the load and the power of the load.

Page 37

The data connection is primarily required so that the inverter or Datamanager can share default values with the Ohmpilot. For some applications, however, it is also necessary to implement settings via the Ohmpilot website.

There are 3 possible communication channels:

- Modbus RTU (via RS 485)

- LAN (Ethernet)

- WLAN

Establishing the Data Connection

Possible Communication Channels

NOTE! The Datamanager 2.0 must have software version 3.8.1-x or a later ver-

sion installed.

Page 38

Establishing a Connection via Modbus RTU

1. Connect the bus cabling (B) to the Ohmpilot. (The bus cabling is carried out in parallel

via the TX+, TX- and GND cables with the Fronius Smart Meter and the Fronius

inverter or Datamanager 2.0).

2. Terminate the RS485 bus with a resistance at the rst and last device. The resistance can be activated on the Ohmpilot using DIP switch number 5. See (A).

3. The Modbus address can be set using numbers 1-3. Default address: 40 (For future applications, the Modbus address can be changed using the DIP switches

on the Ohmpilot.)

(A) DIP switches

DIP 1-3 = Modbus address BCD DIP 4 = Reserve DIP 5 = Terminating resistance

(120 Ohm)

Fronius Smart Meter OUTPUT

Fronius

RS 485

Fronius

Datamanager

2.0

INPUT

DT/PE

Ohmpilot

120Ω

1 3

Rx / T-x GND

4 6 7 9111

2 3 4 5

DA B C

- D+ D-

D+ D- -

120Ω

OFF

(A)

(B)

WARNING! Use a data cable that is clearly distinguishable from the mains cable, so that there is no confusion and injury and damage to property are avoided.

IMPORTANT! In the case of incorrect cabling, this will be displayed by the

red LED ashing 1x.

Page 39

Establishing a Connection via LAN

As standard, the Ohmpilot obtains its IP address automatically from the DHCP server, meaning that no settings are generally necessary.

The inverter automatically searches for the Ohmpilot, with the search process taking up to 5 minutes. If the red LED is unlit and the green LED is ashing, the Ohmpilot is working correctly.

A static IP address can be assigned to the Ohmpilot via the web interface.

1. Open the website http://ohmpilotL.local. Alternatively, the IP address assigned by the DHCP server can also be read off. Almost every router displays the devices connected to

it (its clients) on its web interface. Apps such as Fing can also help to nd the IP address

that has been assigned automatically. Alternatively, the Fronius Solar.web app can also be used to search for the Ohmpilot in the network.

NOTE! In networks with a DNS sufx, the Ohmpilot can be reached at http:// ohmpilotL.<DNS sufx>. E.g. http://ohmpilotL.fronius.com

In order to congure the IP address manually, the "static" option must be selected. Then

enter the IP address required.

The Ohmpilot can then be reached at http://ohmpilotL.local or at the xed IP address

assigned.

In order to implement various settings, the WLAN connection must briey be

opened as follows

1. Press the button on the Ohmpilot 2x. The blue LED ashes (twice) for as long as the WLAN access point is active (30 minutes). Before the access point is opened, a search

for available WLAN networks is carried out.

2. Activate the "Ohmpilot" WLAN network on your smart device or PC.

3. Enter the website http://192.168.250.181 or http://ohmpilotW.local in the browser. Alternatively, the Fronius Solar.web app can also be used to search for the Ohmpilot in the network.

NOTE! In networks with a DNS sufx, the Ohmpilot can be reached at http://

ohmpilotW.<DNS- Sufx>. E.g. http://ohmpilotW.fronius.com

4. Implement the settings.

Page 40

Establishing a Connection via WLAN

There are two options for connecting the Ohmpilot to an existing WLAN network:

Connecting via WPS (WiFi Protected Setup)

1. Press the button on the Ohmpilot 1x. The blue LED ashes (once) for as long as the

WPS is active.

2. Press the WPS button on the router within 2 minutes.

3. If the blue LED on the Ohmpilot is now lit steadily, the connection to the network was successful.

4. The inverter automatically searches for the Ohmpilot, with the search process taking

up to 5 minutes. If the red LED is unlit and the green LED is ashing, the Ohmpilot is

working correctly.

Connecting via access point and manual conguration of the WLAN

Settings

1. Press the button on the Ohmpilot 2x. The blue LED ashes (twice) for as long as the

WLAN access point is active (30 minutes). Before the access point is opened, a

search for available WLAN networks is carried out.

2. Activate the "Ohmpilot" WLAN network on your smart device or PC.

3. Enter the website http://192.168.250.181 or http://ohmpilotW.local in the browser.

Alternatively, the Fronius Solar.web app can also be used to search for the Ohmpilot in the network.

4. Select the required network in the WLAN network tab.

NOTE! If the required WLAN network is not listed, end access point mode by pressing the button again and repeat the process.

5. Click "Save & Connect", and enter the WLAN password.

6. If the blue LED on the Ohmpilot is now lit steadily, the connection to the network was

successful.

7. The inverter automatically searches for the Ohmpilot, with the search process taking

up to 5 minutes. If the red LED is unlit and the green LED is ashing, the Ohmpilot

is working correctly.

Page 41

IMPORTANT! When the access point is opened, it is not possible to scan the WLAN networks.

A static IP address can be assigned to the Ohmpilot via the web interface.

The Ohmpilot can then be reached at http://ohmpilotW.local or at the xed IP address

assigned. Alternatively, the Fronius Solar.web app can also be used to search for the Ohmpilot in the network.

NOTE! Only one device can connect to the Ohmpilot.

NOTE! In networks with a DNS sufx, the Ohmpilot can be reached at http://

ohmpilotW.<DNS- Sufx>. E.g. http://ohmpilotW.fronius.com

Page 42

TARGET TEMPERATURE

LEGIONELLA PREVENTION

BOOST

ERROR

Ohmpilot is operating in normal mode.

Temperature has fallen below the minimum. Heater 1 is heating at 100%.

Legionella heating is active. Heater 1 is heating at 100%.

The Ohmpilot has been switched to boost mode manually. Heater 1 is heating at 100%. An error has been detected. More information should be read off from Solar Web.

Current measured temperature. A valid value is only displayed when a temperature sensor is connected.

Current power being used by the Ohmpilot.

Heater 2 is active. Heater 2 may be a second heating element, a heat

pump or an external source (e.g. gas-red heating).

Phase 2 of 3-phase heating element is active.

Phase 3 of 3-phase heating element is active.

Status Indication on Web Interface

Status

Temperature

Heat output

Heater 2

L2 heating element

L3 heating element

Page 43

When the legionella prevention system is activated, the hot water is heated to 60 °C at a set interval.

1. Highlight the eld "Temperature sensor present"

2. Highlight the eld "Legionella prevention (h)"

3. Enter the cycle for the legionella prevention.

NOTE! If the boiler is operated at a temperature <60 °C for a relatively long

period of time and no hygienic storage tank is being used, measures must be taken to kill the legionella bacteria. For private use, it is recommended to im-

plement legionella prevention at least once a week (168 hours). In the case of

a large hot water storage tank and/or a comparatively low consumption of hot water, legionella prevention should be carried out regularly. A PT1000 temperature sensor is required for this function and can be sourced from Fronius under item number 43,0001,1188.

Optional Settings

IMPORTANT! The settings described here can be implemented for all of the application

examples detailed above. If they are not described for the relevant example, they are not vital.

You can also set the power of HEATER 1 manually.

1. To do this, select the "manual" eld.

2. Select whether it is a 1-phase or 3-phase load.

3. Enter the power of the load in Watts.

NOTE! In the case of applications with a 1-phase and a 3-phase heating element, it is not possible for the Ohmpilot to measure heating element 1

automatically due to the cabling. In this case, the conguration must be carried

out manually.

Manual Settings HEATER 1

Activating Legionella Prevention

Page 44

Adapting the Day Curve

Temperature Limitation

This function ensures that a required temperature is not undercut. If there is not sufcient

surplus power available, the external source will be started up, if activated, or otherwise electricity will be drawn from the grid in order to ensure a minimum temperature.

Up to four time periods can be dened so that, for example, higher hot water temperatures are only certain to be available at night, but more potential is possible for the surplus during the day due to the fact that a lower target temperature is selected.

1. Highlight the eld "Temperature sensor present"

2. Highlight the eld "Adapt day curve"

3. Under "Time from", enter the time from which the Ohmpilot should start to heat to the

new target temperature. This target temperature is valid until the next entry.

NOTE! One entry is valid for the whole day.

4. Under "Target temperature", enter the required nal temperature.

NOTE! If heater 1 is the primary heat source, the day curve must in all cases be adapted to ensure the required minimum temperature. A PT1000 temperature sensor is required for this function and can be sourced from Fronius under item

number 43,0001,1188. The position of the temperature sensor in the boiler

should be chosen so that sufcient hot water is available. However, it must in all

cases be installed above the heating element/external source.

If heater 1 does not have a congurable thermostat, this function can be used to limit the

temperature.

1. Highlight the eld "Temperature sensor present"

2. Highlight the eld "Temperature limitation"

3. Enter the maximum temperature (e.g. 60 °C).

NOTE! This function is only possible for heater 1. If a second heating element is in use as heater 2, this must have a thermostat. A PT1000 temperature sensor is required for this function and can be sourced from Fronius under item number

43,0001,1188. The temperature sensor should be installed just above the

heating element, so that the cold water owing in is immediately heated up

again and the maximum storage amount is therefore used.

WARNING! No guaranteed legionella prevention.

Example:

05:00 10°C=> After showers, the hot water will only be produced with surplus energy

16:00 45°C=> If there was not sufcient excess energy, the water will be heated

18:00 10°C=> After showers, no more heating should occur, thus minimizing heating losses 03:00 45°C=> Water will be warmed so that it is ready for showers at 6am

Page 45

Error List:

Sending of Errors

• Errors are saved in the Datamanager 2.0 and can be sent via Solar Web.

• Possible error outputs (as of 07/12/2015):

Code

906

907 908

909 910 911

912

913 914

915 916 917

918 919

920

921

922

923

924

Description

Heating element 1 faulty short circuit L1

HE 1 - overload on L2 HE 1 - overload on L3

HE 1 faulty - L1 highly resistive HE 1 faulty - L2 highly resistive HE 1 faulty - L3 highly resistive

HE 2 faulty short circuit L1

HE 2 - overload on L2 HE 2 - overload on L3

HE 2 faulty - L1 highly resistive HE 2 faulty - L2 highly resistive HE 2 faulty - L3 highly resistive

Relay 2 faulty Relay 3 faulty

TS short circuit

TS not connected or faulty

60 °C for legionella prevention could not be achieved within 24 hours. Target temperature could not be achieved within 5 hours

ES could not achieve target temperature within 5 hours.

Cause

The load on L1 is higher than 3 kW. Short circuit on L1.

Current on L2 is greater than 16 A. Current on L3 is greater than 16 A.

No current owing through L1/L2/

L3. L1/L2/L3 of HE 1 faulty. Phase L1/L2/L3 interrupted.

The load on L1 is higher than 3 kW. Short circuit on L1.

Current on L2 greater than 16 A. Current on L3 greater than 16 A.

No current owing through L1/L2/

L3. L1/L2/L3 of HE 2 faulty. Phase L1/L2/L3 interrupted.

Relay R2/R3 sticking.

TS input resistance less than 200 Ohm. No PT1000 TS connected. TS faulty.

No TS connected (Input resistance greater than

2000 Ohm). TS is activated (should be deactivated). TS cable

faulty. TS faulty. No PT1000 TS connected.

ES is switched off/faulty. (922

only). TS was incorrectly installed.

Heating system is incorrectly dimensioned (excessive hot water

consumption, etc.) HE/TS faulty.

ES switched off/faulty. ES not connected to Ohmpilot. TS incorrectly installed. Heating system incorrectly dimensioned (excessive hot

water consumption, etc.) TS faulty.

Solution

Check heating element 1. Check wiring.

Check HE 1 and replace if necessary.

Check L1/L2/L3. Check L1/ L2/L3 connections.

Check HE 2. Check wiring.

Check HE2 and replace if necessary.

Check L1/L2/L3. Check L1/ L2/L3 connections.

Replace Ohmpilot.

Check cable and connections on TS cable. Replace TS.

Connect TS to device. Deactivate TS via the website (if

no sensor is required). Check

TS cable. Replace TS.

Switch on ES (922 only).

Install TS above the HE (in

protective tube). Deactivate

legionella prevention via the website. Replace HE/TS.

Switch on ES. Connect ES to relay 1. Install TS above the heat battery of the ES. Check the target temperature setting. Replace TS.

HE=Heating element TS=Temperature sensor I=Inverter ES=External source (e.g. gas-red heating)

Page 46

Code

925

926

927

928

Description

Time not synchronised

No connection to inverter

Ohmpilot overtemperature

Ohmpilot undertemperature

Residual current-operated circuit breaker is triggered

Ohmpilot is not using any surplus

Ohmpilot is using only part of the surplus power

Power at the feed-in point is not always adjusted to 0

After switch-on, the green LED

makes 2 long ashes

Cause

Time not synchronised in the last 24 hours. Router has been

switched off/recongured.

No connection between inverter and Ohmpilot. Inverter switched off. Even at night, the Ohmpilot needs a connection to the inverter. Router switched off/faulty/recongured. Night switch-off function on the inverter activated. Poor WLAN connection from the inverter or Ohmpilot to the router.

Ambient temperature too high

(>40 °C). Heating element has too

much power. Ventilation slots covered.

Ambient temperature too low (<0

°C).

N and L mixed up.

Thermostat on the heating element has switched off. Safety thermo-

stat (STC) on the heating element

has been triggered.

Heating element power is lower than surplus power.

Load and generation uctuations

require a few seconds to settle down.

Thermostat on heating element has switched off. Heating element is not connected

Solution

Check connection between Ohmpilot and inverter. Switch on router. Check network settings.

Check connection. Switch on inverter. Update software. Switch Ohmpilot and inverter off and on again. The night switch-off function of the inverter must be disabled. On the display of the inverter, open the "SETUP/ Display settings/Night mode" menu, set the night mode to ON. Switch on the router. Position the WLAN antenna better. Check the network settings.

Install Ohmpilot in a cooler location. Use heating element with more reliable power. Uncover ventilation slots.

Install Ohmpilot in a warmer location. Installation outdoors is not permitted!

Connect N and L correctly.

Wait until the thermostat switches on again. Reset the safety thermostat.

Select a larger heating element where necessary.

Briey turn up the thermostat

for the power measurement. Connect the heating element.

HE=Heating element TS=Temperature sensor I=Inverter ES=External source (e.g. gas-red heating)

Page 47

Detailed, country-specic warranty terms are available on the internet:

www.fronius.com/solar/warranty

If you decide in the future to replace your Ohmpilot, Fronius will take back the old device and arrange for it to be recycled in an appropriate manner.

CE mark

The devices comply with all the requisite and relevant standards and guidelines that form part of the relevant EU Directive, and are therefore permitted to display the CE mark.

Warranty Terms and Conditions, and Disposal

Fronius Manufacturer's Warranty

Disposal

Applicable Standards and Guidelines

Page 48

Frequency Nominal voltage Max. input current

Modbus RTU LAN WLAN Temperature sensor

Analogue out 1-phase/3-phase Analogue nominal voltage per phase Analogue out short circuit current Relay out max. current Multifunctional relay out

Efciency during rated operation

Consumption during standby

Dimensions (height x width x depth)

Weight Degree of protection Mounting Ambient temperature range Permitted humidity Cooling Storage temperature EMC device class Overvoltage category Pollution level

50 Hz

230 V / 400 V

1 X 16 A / 3 x 16 A

RS 485, max. 1000 m, screened and twisted

Ethernet at least CAT5, screened

IEEE 802.11 b/g/n

PT1000 (max. 30 m)

Continuously variable 0 - 3 / 0 - 9 kW

13 A

16 A (max. 5 seconds)

L2 / L3 16 A (max. 5 seconds)

min. 15 V / 2 mA; max. 16 A (max. 5 seconds)

at least 98%

typically 1.8 W

340 mm x 270 mm x 123 mm

3.9 kg IP54

Wall

0 to 40 °C

0%-99% (non-condensing)

Convection

-40 to 70 °C B

3 3

Technical Data

Input Data

Interfaces

Output Data

General Data

Page 49

Electronic RS 2.5.5 independently mounted RS

2.10.6.1 mounting method type Y

Protection class I 6.8.3

Micro interruption according to 2.4.4.

PTI 175 according 6.13.2

N according to 7.4.3, earth connection according to

9.1.1

Mode of operation TYPE 1 according to 2.6.1

C according to 6.4.3.3

Casing 550°C, the cable bushing / strain relief 650°C; Category B according to EN 60730-1:2000/A1:2004;

According to EN 61000-6-2:2005, EN 60730-1:2011,

EN 301 489-1 (V1.9.2) Wire to wire | Cable(s) to earth

Signal and control wires: --- ± | 1 kV DC power inputs: ± 0.5 kV | ± 0.5 kV AC power inputs: ± 1 kV |± 2 kV

According to 21.2.1, 21.2.2, 21.2.3 and 21.2.4, Casing: Ball pressure test 1: 102 °C Cable bushing: Ball pressure test 2: 125 °C

max. 3Nm

According to EN 61000-6-2:2005, EN 60730-1:2011,

EN 301 489-1 (V1.9.2) Wire to wire | cable(s) to earth

Signal and control wires: --- ± | 1 kV DC power inputs: ± 0.5 kV | ± 0.5 kV AC power inputs: ± 1 kV |± 2 kV

Inspection / Specications

Inspection / Specications according to EN60730 Section 1 Table 7.2

31a

Construction

Screwless Terminal

RS Classication, to Protect Against

Electric Shock Section 6.8

Type of Disconnection or Interruption for Each Circuit

PTI-Value of the Insulation Material Used for Insulation

Protective Earth Connection Type

Mode of Operation

Additional Features of Mode of Operation

Heat Filament Test Temperatures (Sec-

tions 21.2.1, 21.2.2, 21.2.3 and 21.2.4)

Rated Impulse Voltage (Section 2.1.12,

20.1)

Ball Pressure Test Temperature

Maximum Specied Torque for

Single-Bush Mounting with a Thermo-

plastic Material (Table 20, Note 1)

Rated Impulse Voltage for Creepage and Clearance Distances

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Page 51

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Fronius Worldwide - www.fronius.com/addresses

Fronius International GmbH

4600 Wels, Froniusplatz 1, Austria

E-mail: pv-sales@fronius.com

http://www.fronius.com

The addresses of all our sales branches and partner companies can be found at http://www.fronius.com/addresses.

Fronius USA LLC Solar Electronics Division

6797 Fronius Drive, Portage, IN 46368

E-mail: pv-us@fronius.com

http://www.fronius-usa.com

Fronius Ohmpilot Operating Instruction

Specifications and Main Features

Frequently Asked Questions

User Manual