eta eHACK 60-80 kW Instruction Manual

2022-04-12
EN
0000000352
V.010
3.55.0
5111
93085-001
Wood chip boiler
eHACK 60-80 kW
Operation

ETA Heiztechnik
Gewerbepark 1
A-4716 Hofkirchen an der Trattnach
Tel: [phone] / 22 88 -0
Fax: [phone] / 22 88 -22
[email protected]
www.eta.co.at

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Contents
1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Preface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Warranty, guarantee and liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Safety devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Changing the fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Slag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Empty the ash box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 ETAtouch controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1 Getting to know the control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1.1 User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1.2 Text menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1.3 Integrated help. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.1.4 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1.5 Inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.1.6 Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1.7 meinETA remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.1.8 Favourites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.1.9 USB camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.2 [Boiler] function block – eHACK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.2.1 Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.2.2 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.3 [BufferFlex] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.3.1 Setting the buffer charging times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.3.2 Setting warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.3.3 Buffer with solar heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.3.4 Buffer as a combination tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.3.5 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.4 [Hot water tank] function block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.4.1 Setting the hot water charging times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.4.2 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.5 [Fresh water module] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.5.1 Setting the hot water charging times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.5.2 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.6 [Heating circuit] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.6.1 Operating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.6.2 Setting the heating time slots. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.6.3 The heating curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.6.4 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
6.7 [Solar] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
6.7.1 Solar heating system with one tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

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6.7.2 Solar heating system with 2 tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
6.7.3 Solar heating system for buffer with 2 internal coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
6.7.4 Solar heating system with external heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
6.7.5 Solar heating system with external heat exchanger and stratified charging valve. . . . . . . . . 64
6.7.6 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
6.8 [Aux.boiler] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
6.8.1 Setting the charging times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.8.2 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.9 [External heat demand] function block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
6.9.1 Setting the charging times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.9.2 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.10 [Heating pipeline] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
6.11 Function block [precipitator] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
6.12 Function block [special conveyor] and [external conveyor] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.12.1 Intermediate conveyor screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .76
6.12.2 Double agitator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.13 [Agitator] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
7 Filling the storage room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
8 Rectifying problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
8.1 Fuel conveying system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
8.2 Ash screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
8.3 Tilting grate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
8.4 Heat exchanger cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
8.5 Precipitator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
9 Information on fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
9.1 Suitable fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
9.2 Moist fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
9.3 Drying and chopping wood chips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
9.4 Water content. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
9.5 Judging the quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
9.6 Heating value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
10 Emission measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
10.1 Information about measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
10.1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
10.1.2 Flue pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
10.1.3 Adjustable parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
10.2 Perform emissions measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
11 Low-emission operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
12 Heating water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
12.1 Water hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
12.2 Refilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
13 Energy Labelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

General Preface
5
1 General
1.1 Preface
Dear customer,
This user manual provides important information and
instructions, to ensure safe and satisfactory operation
of your product. Please take the time to look through it.
Warranty and guarantee
You should also read the "Conditions for warranty,
guarantee, liability" (see chapter 1.3 "Warranty,
guarantee and liability") carefully. As a rule, a
professional heating technician shall satisfy these
conditions. Nevertheless, inform the technician of our
warranty conditions. All of the requirements we impose
are intended to prevent damage that neither you nor
we wish to occur.
Read the user manual
Please read the user manual carefully before starting
up the system. This is the only way to ensure that you
can operate your new boiler efficiently and with
minimum environmental impact.
Take advantage of the knowledge and skills of an
expert
Only allow an expert to assemble, install and
commission the equipment and carry out the basic
boiler settings. Insist on receiving an explanation and
training on how your new boiler functions and how to
operate and maintain it.
Extended warranty
We grant an extended warranty if the product is
commissioned by an authorised partner company or
by our own customer service. In this regard, please
note the warranty conditions applicable at the time of
purchase.
Service agreement
You can ensure the best care for your heating system
by taking out a service agreement with one of our
certified contractors or our own customer service.
Remote control of the boiler via the internet
The remote control enables you to operate your ETA
boiler remotely via your own network (VNC Viewer) or
the internet <www.meinETA.at> using a PC,
smartphone or tablet, as though you were standing
right in front of the ETAtouch control system of your
ETA boiler. A LAN cable is required for the connection
from the ETAtouch control system to the internet
modem.
Details for the remote control can be found in the
manual "Communication platform meinETA".
Details for the connection of the LAN cable can be
found in the boilers installation manual.
1.2 General information
Copyright
All contents of this document are property of ETA
Heiztechnik GmbH and are protected by copyright.
Any reproduction, transfer to third parties or use for
other purposes is prohibited without written permission
from the owner.
Type plate
On the product you will find the type plate with the
manufacturer's number of your product. The serial
number and the version number are contained in the
manufacturer's number. In case of enquiries, please
have the manufacturing number ready for identification
of your product. Enter your manufacturing number
here.
1 Serial number
2 Version number
Subject to technical changes
We reserve the right to make technical modifications
without notice. Printing and typesetting errors or
changes of any kind made in the interim are not cause
for claims. Individual configurations depicted or
described here are only available optionally. In the

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Warranty, guarantee and liability General
event of contradictions between individual documents
regarding delivery scope, the information in our current
price list applies.
Software Description
The software version described in this documentation
corresponds to the version valid at the time of
publication. The software version installed on your
product may differ from that described in this
documentation.
A software update to a more recent version can
always be performed. With the appropriate
authorisation, the required files can be found at
"www.eta.co.at".
Explanation of symbols
Instructions and information
Layout of safety instructions
SIGNAL WORD!
Type and source of danger
Possible effects
• Measures for avoiding the danger
Types of safety instruction
CAUTION!
On non-compliance with this safety instruction, there is
a risk of material damage.
WARNING!
On non-compliance with this safety instruction, there is
a risk of physical injury.
DANGER!
On non-compliance with this safety instruction, there is
a risk of major physical injury.
1.3 Warranty, guarantee and liability
Requirements
We can only accept liability for the function of our
products if they are correctly installed and operated.
This is only possible if the conditions below are
complied with.
Maximum of 2,000 hours at full load per year
The boiler described in this user manual may only be
used for heating and producing hot water, with no more
than 2,000 full-load hours annually.
Installation in a dry room
For set-up, a dry room is required. In particular, only
condensation dryers may be used as clothes dryers in
the same room.
Observe local building and fire safety regulations
Local building and fire safety regulations must be
observed.
Suitable fuels
• Wood chips according EN ISO 17225-4:2014,
quality classes A1/A2/B1/B2, size P16S-P31S,
maximum water content 35% (M35)
• Wood pellets according EN ISO 17225-2:2014,
quality class A1, ENplus-A1
• Shavings and swarf briquets according EN
ISO 17225-3:2014, quality classes A1/A2/B
• In Germany: fuel classes 4/5a according
1. BImSchV. Use fuel classes 5/6/7/8 only after
consultation with company ETA.
Operation with unsuitable fuels, in particular high-
slag pellets from grain waste, for example, or
corrosive fuels such as miscanthus fertilised with
potassium chloride, is prohibited.
Ensure supply air is free from aggressive
substances
The air supplied to the boiler must be free from
aggressive substances such as chlorine and fluorine
from solvents, cleaning agents, adhesives and
propellants, or ammonia from cleaning agents, to
prevent corrosion of the boiler and chimney.
Permissible water hardness
Water is the intended heat-transfer medium. For
special anti-frost requirements, up to 30% glycol may
be added. Softened water is required for the initial fill-
up of the heating system and for refilling after repairs.
Addition of hard water should be minimised to limit
limescale build-up in the boiler.
In order to protect the boiler from calcification, the
water hardness of the heating water must be
taken into account. Observe the indications outlined in
ÖNORM H 5195-1. Details can be found in chapter
12.1 "Water hardness".

General Warranty, guarantee and liability
7
pH value between 8 and 9
The pH value of water used to fill the heating system
must be between 8 and 9.
Use a sufficient number of shut-off valves
Set enough shut-off valves to avoid bleeding large
amounts of water during repairs. Any leaks in the
system must be repaired at once.
Provide a sufficiently large expansion tank or a
pressure maintaining device
To prevent air from being drawn in while the system is
cooling, the heating system professional must provide
a sufficiently large expansion tank or a pressure
maintaining device.
Open expansion tanks must not be used.
Sufficient power
Operation at lower power than the lowest power
specified on the type plate is not permitted.
Expanding the control system
Only components provided by us may be used for
expanding the control system, unless these are
generally available standard devices, such as
thermostats.
Regularly perform cleaning and maintenance
Cleaning and maintaining the product is essential. The
required steps and intervals are either contained in this
documentation or included as a separate document.
Repairs
Repairs are only permitted using spare parts provided
by us. The only exceptions are common standardised
parts such as electrical fuses or fastening materials, as
long as they possess the required features and do not
restrict the functionality of the system.
Proper installation
The installing contractor is liable for proper installation
according to the corresponding installation instructions
and the relevant rules and safety regulations. If you as
customer have installed the heating system partly or
entirely without relevant training and in particular
without up-to-date practical experience, without having
the installation checked by a trained and responsible
expert, we exclude defects in our delivery and
consequential damages resulting from this cause from
our warranty, guarantee and liability.
Repair of defects
For repairs of defects carried out by the customer or by
a third party, ETA shall only bear the costs or remain
obligated by warranty if this work was approved in
writing in advance by the customer service of ETA
Heiztechnik GmbH.
No tampering with boiler safety devices
Boiler safety devices such as those mentioned below
must not be tampered with: Temperature monitoring
and control devices, safety temperature limiters, safety
valves and thermal discharge valves.
Potential equalization is needed for the boiler
The boiler must be connected to the potential
equalization of the boiler room or the building. Country-
specific regulations must be observed.
Surface corrosion
Surface corrosion on the inside of the precipitator is no
cause for concern. It does not impair the function.
Surface corrosion does not entitle to warranty or
guarantee claims.

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Description
2 Description
Operating elements of the boiler
The illustration shows a wood chip boiler with fuel
discharge on the left side. The illustrations are
also equally representative of a boiler with the fuel
discharge on the right side.
1 Release button for safety temperature limiter
(STB)
2 Mains switch (symbol )
3 Maintenance switch (symbol )
4 Screen for the ETAtouch control system
5 Door contact switch
6 Combustion chamber door
7 Insulation door
8 Lever to lock the ash box in boiler
9Ash box

Description
9
The firebed switch as well as the firebed level sensor
are located behind the cover on the front of the boiler.
1 adjustable firebed switch
2 Firebed level sensor with potentiometer
The firebed level sensor measures and controls
the height of the firebed. The firebed switch is a
safety switch that triggers if the firebed is too high.
Explanation of the maintenance switch
The maintenance switch on the boiler is needed for
performing maintenance with the aid of the
[Maintenance] function in the ETAtouch control
system. This displays the individual maintenance
steps on the boiler screen.
With this variant the heating mode is stopped, but
the boiler remains on at the mains switch. So that
all drives are disconnected, the safety chain of the
boiler is disrupted with the maintenance switch. The
screen will display a message when it is time to actuate
the maintenance switch.
Fig. 2-1: Maintenance switch
The maintenance switch is marked with the
symbol and has two settings.
•"1" = regular operation
This is the standard position of the maintenance
switch. The boiler can execute heating mode in this
position.
•"0" = maintenance mode
In this position, all drives are disconnected to
perform maintenance. The circuit boards,
however, are still live.
Display maintenance steps on the screen
With this boiler, the maintenance steps can also be
displayed on the ETAtouch control system screen. The
required activities will be explained to you step-by-step
and supplemented with detailed graphics. Each
maintenance is saved and the details can be viewed at
any time. So you can maintain a long-term overview of
the maintenance carried out. Of course, the
maintenance can also be carried out using the service
guide, without the support of the ETAtouch control
system.
To access maintenance, switch to settings in the boiler
function block ( [Settings] button) and then select
the function [Maintenance].
Fig. 2-2: Overview (example)
You can also access this overview by pressing
the maintenance switch. Also when the message
appears that maintenance of the boiler is required.
In the overview the different maintenance intervals are
listed in the upper area. This includes the maintenance
already carried out. With the button, information
about the selected maintenance is displayed.
Maintenance that you can carry out as an end
customer is labelled with the symbol. All others are
reserved for specialists and require authorisation.

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Description
Press the button to start the maintenance. The
individual steps are displayed on the screen. You can
switch to the next or the previous screen respectively
with the arrow keys on the left and right side of the
screen.
Fig. 2-3: Maintenance step (example)
Follow the on-screen instructions and carry out all
steps carefully. Enter your name at the end of
maintenance ( button) and save the maintenance
with the button.
Fig. 2-4: End of maintenance
To end maintenance prematurely, press the right
arrow key several times until you get to the end.
There you can end the maintenance with the
button. Cancellation during a maintenance step is not
possible.
Adjust the hinges for the screen
The ease of movement of the hinges to swivel the
screen can be adjusted with the Allen key supplied. If
the screen does not remain in its desired position,
tighten the screws on the hinges a little.
Fig. 2-5: Hinges
Adjustable damping of the heat exchanger
cleaning
There is a lever on the rear of the boiler with which the
damping of the heat exchanger cleaning is set. If high
quality fuel is used, there is less ash in the turbulators
or they get dirty less often. The heat exchanger
cleaning therefore does not require the full force for
remove the ash from the turbulators.
Fig. 2-6: Lever

Description
11
This then allows damping of the heat exchanger
cleaner to be set when high quality fuel is used.
This is done by engaging the lever in one of the lower
positions. The impact noise of the cleaning is also
reduced by this.
Fig. 2-7: Positions
1 No damping (full force)
2 Highest damping (less force)
For fuels with poorer quality (many impurities,
high ash content, high water content), no
damping may be set. Therefore, engage the lever in
the top position.
Clean panels
If necessary, clean the panels of the boiler and the
ETAtouch screen with a moist cloth.
Under no circumstances use aggressive
solvents, chemicals or scouring agents. They can
lead to stress cracks and damage.
Protection function for drives and pumps
Lets you switch on the boiler in summer, or
outside the heating period on the main switch. As
the ETAtouch control system starts some drives and
pumps for a short time at regular intervals so that they
do not seize in the event of a longer standstill.
If the boiler is switched off for a longer time on the
mains switch, then this protection function is missing.
Drives or pumps could then seize and cause faults
when being switched back on.

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General information Safety
3 Safety
3.1 General information
Operation only by trained personnel
The product may be operated by trained adults only.
Training may be provided by the heating technician or
our customer service. Please read the associated
documentation carefully in order to avoid errors during
operation and maintenance.
Persons who lack experience and knowledge as well
as children may not operate, clean, or maintain the
product.
Keep children away from the fuel store and
storeroom
In fuel stores for wood chips, in particular, there is a
danger that a hollow space may form above the
agitator. Children playing on the pile of wood chips, or
careless adults, could fall in and get buried or caught
up in the discharge screw.
Keep fire extinguishers in a clearly visible location
In Austria, the minimum requirement is an
ABC powder extinguisher with 6 kg. An AB foam
extinguisher with 9 litres, which produces less damage
when used, is preferable. The fire extinguisher should
be kept outside the boiler room, visible and easily
accessible. Even if country-specific regulations do not
prescribe a fire extinguisher, we still recommend that
you keep one in-house.
Fig. 3-1: Fire extinguisher
Storage of ash
The ash must be kept in non-flammable containers
with covers for cooling. Never put hot ash into the
waste bin!
DANGER!
Do not carry out work on high voltage units
If the product is equipped with an
electrostatic precipitator, the housing of the
high-voltage unit must not be opened or
damaged as there are parts inside it that
are under high voltage.
Failure to comply with the above may result in
serious or fatal injuries.
DANGER!
Caution high voltage!
If the product is equipped with an electrost
atic particle separator, the electrode inside
the precipitator can still have residual
voltage even after switching off the power
supply.
Therefore, switch off the boiler at the mains switch
and ensure that it cannot be switched back on
before starting work. Then establish additional
earthing between the electrode on the inside and
the housing of the precipitator.
3.2 Safety devices
Pump safety run, automatic heat dissipation at
overtemperature
If the boiler temperature exceeds 90°C (factory setting)
for any reason, the pump safety run will start. All
heating pumps and boiler pumps that are connected to
the boiler control system are switched on to dissipate
heat from the boiler.
This action prevents the boiler temperature from rising
further and triggering further safety devices such as
the safety temperature limiter and the thermal relief
valve.

Safety Safety devices
13
The heat dissipation is limited by the maximum
flow temperature set in the heating circuits and
the target hot water temperature.
Safety shutdown by safety temperature limiter
For additional safety against boiler overheating, a
safety temperature limiter is built into the boiler. When
a boiler temperature of 100 °C (tolerance +0/-6 °C) is
reached, the power supply is interrupted to the draught
fan and the fuel feed. When the boiler temperature falls
back below 70 °C, the safety temperature limiter can
be manually released for a restart of the boiler.
Installing a safety valve against overpressure
A safety valve with 3 bar opening pressure must be
installed on the boiler. Every heat producer in a heating
system must be protected by at least one safety valve
against pressure exceeding the maximum permissible
operating pressure (see EN 12828). These valves
must be designed such as to ensure the maximum
permissible operating pressure that can arise in the
heating system or parts thereof. The safety valve must
be situated in the boiler room and be easily accessible.
Fig. 3-2: Safety valve
DANGER!
Do not install any shut-off valves, strainers or such like
between the boiler and the safety valve.
The connection size of the safety valve is determined
on the basis of the heating system's maximum heating
capacity, as shown in the table.
A separate connection is already available on the
boiler for the safety valve (see following graphic).
The safety valve must be connected to it.
Fig. 3-3: Connection
The safety valve may be installed in any position, but
the upper part of the valve must not face downward.
The flow pipe may be 1 m long maximum and must be
routed in a straight line in the nominal diameter of the
valve inlet.
DANGER!
Safety valve outlet
The safety valve outlet must be directed to the ground
in a pipe so nobody is endangered by hot water or
steam.
The safety valve outlet (vent pipe) must have at
least the same nominal diameter as the valve
outlet, be installed with a consistent gradient and
be routed to a sewage system (e.g. duct). The vent
pipe may contain a maximum of 2 bends and be
2 m long. If a length of more than 2 m is required,
the next size of pipe must be selected. More than
3 bends and 4 m of length are not permitted. The
mouth of the vent pipe must allow easy inspection
and be routed such as to exclude any danger to
persons. If the vent pipe ends above a funnel, its
discharge pipe must have a cross section at least
double that of the valve inlet.
Valve sizea
Nominal diameter (DN)
a. The valve size is determined by the size of the inlet
connection.
Maximum heating ca-
pacity (kW)
15 (G ½) 50
20 (G ¾) 100
25 (G 1) 200
32 (G 1 ¼) 300
40 (G 1 ½) 600
50 (G 2) 900

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Changing the fuel
4 Changing the fuel
Optional flue gas recirculation
For very dry fuels (such as pellets, joinery waste fuel,
miscanthus or wood chips with water content under
15%), the optional flue gas recirculation is required.
This lowers the combustion temperature and thus
minimises slag formation.
Fig. 4-1: Flue gas recirculation
Flue gas recirculation is also recommended for varying
fuel quality. For example, with dry wood chips (less
than 15% water content) and moist wood chips, but
also for wood chips with high bark content and/or high
fine content. This favours the formation of slag.
Retrofitting of the flue gas recirculation is carried
out quickly because the boiler is already prepared
for this at the factory. If slag has already formed,
consideration should be given to retrofitting the flue
gas recirculation system to ensure continuous and
safe operation of the boiler.
Setting the fuel type in the control system
The control system provides a selection of different
fuels. For each one different values are stored for the
combustion and de-ashing. If the fuel is changed, the
new fuel must also be set in the control system. If the
water content and density are known, these
parameters must also be adjusted. Changing the fuel,
density and water content in the control system is
described in chapter 6.2.2 "Text menu - Adjustable
parameters".
Setting the firebed level sensor
When the fuel is changed, the position of the firebed
level sensor must also be changed. The sensor is
located behind the cover on the front of the boiler.
Fig. 4-2: Cover
Fig. 4-3: adjustable firebed level sensor

Changing the fuel Slag
15
To adjust the position, loosen the screw, turn the
firebed level sensor and fix it in place with the screw.
The positions for the fuels are visible on the sticker
(next to the firebed level switch).
Fig. 4-4: Positions
The damping can be increased with high quality
fuels
If a high quality fuel is used (less contamination, lower
fine content, lower ash content, lower water content),
then the damping of the turbulators can also be
increased during fuel change. This is done with the
lever on the rear of the boiler.
Details can be found in chapter 2 "Description".
4.1 Slag
What is slag?
Slag is liquified ash of combusted fuel. Liquefaction
occurs when the combustion temperature in the boiler
reaches the ash melting point of the fuel. Slag clogs
the openings in the grate and prevents the flow of air.
As a result, the combustion temperature increases,
which further promotes the formation of slag. This
causes increased wear of the combustion chamber,
the grate, and its de-ashing parts as well as
malfunctions and unnecessary additional maintenance
demands.
How does slag form?
The ash melting point of wood is approximately 1100
°C. The combustion temperature of the boiler (with
good quality wood chips) is approximately 900 °C.
Since the combustion temperature is lower than the
ash melting point of the fuel, no slag will form.
The ash melting point of miscanthus and
impurities like needles, leaves, soil, dirt, and
rotten fuel is approximately 800 °C. Therefore, a high
level of impurities will lead to the formation of slag.
Optional flue gas recirculation is one way to avoid
the formation of slag. Flue gas recirculation
directs a portion of the flue gas back into the
combustion chamber, reducing the combustion
temperature. As a result, the ash melting point of the
fuel is no longer reached, greatly reducing the
formation of slag.
Causes of slag
The causes of slag can be divided into the following
categories:
Characteristics of the fuel
• Wood chips and miscanthus containing a high
level of ash, contaminants (soil, sand, stones), a
high proportion of bark or leaves and needles.
• Pellets and bark pellets that contain a high
proportion of ash.
Improper operation and maintenance of the boiler.
• Leaks in the boiler caused by improperly sealed
maintenance openings.
• Unsealed Lambda probe, defective seals on the
ash box, flue gas recirculation.
• Boiler and flue gas recirculation not regularly
cleaned, or flue gas recirculation does not work
due to high flue draught.
Incorrect control system settings
• Incorrect fuel settings
• De-ashing interval too long.
Generally speaking, the darker the wood chips,
the higher the proportion of dirt that will cause
slag.
When the fuel causes slag
If pieces of slag are found in the ash box, then this is
usually caused by the fuel's ash content. The boiler
must be de-ashed more often. This is done by
shortening the de-ashing interval, see chapter 6.2.2
"Text menu - Adjustable parameters".

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Slag Changing the fuel
A too-high flue draught can also cause slag by
reducing the effectiveness of the flue gas recirculation.
If the flue draught is over 15 Pa, a draught limiter is
required.

Empty the ash box
17
5 Empty the ash box
Stop heating
Stop the heating mode of the boiler with the on / off
switch in the overview of the boiler. The boiler
emits a glowing charge and then switches to operating
mode [Switched off]. Then press the [De-ashing]
key to allow the boiler to perform a final ash removal.
Emptying the ash box and checking the seals
By knocking on the vertical wall of the ash box,
you can also check the ash level without opening
the box. A full ash box makes a short, dull thump.
When empty it makes a hollower sound like a drum.
To empty the ash box, fold the locking lever on the
boiler forward. Remove the ash box from the boiler.
Fig. 5-1: Locking lever
Close the flap on the ash box.
Fig. 5-2: Flap
The ash box can be lifted on the bottom with a
handcart and transported.
Open the lock for the lid and empty the ash box.
Fig. 5-3: Lid
Check the ashes for pieces of embers. Never put
hot ash into the waste bin!
If there are large pieces of slag in the ash, the
combustion chamber and the tilting grate must be
checked and the de-ashing interval reduced if
necessary.

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Empty the ash box
Check if the seal in the lid of the ash box is intact and
replace if necessary.
Fig. 5-4: Seal
Check that the ash box seal on the boiler is intact and
replace it if necessary.
Fig. 5-5: Seal
Attaching the ash box to the boiler
Open the flap on the ash box.
Push the ash box over the connection on the boiler and
connect it to the boiler with the locking lever.
Switching on the boiler
Switch the boiler back on using the on / off
switch .

ETAtouch controller Getting to know the control system
19
6 ETAtouch controller
6.1 Getting to know the control
system
Get to know the control system
Take your time and read the following chapter
carefully. It describes the functions and settings of the
ETAtouch control for your heating system. If you are
familiar with these, it will be easier for you to make
adjustements, even without consulting the manual.
Design of the control system
The individual components of the heating system, e.g.
buffer, hot water tank or heating circuit are shown in
the control system as "function blocks". These are
listed in the uppermost row on the screen. The
respective user interface is opened with a single tap of
the finger.
Fig. 6-1: ETAtouch control system function blocks
1 Currently selected function block
2 Other function blocks, e.g. hot water tank, heating
circuit, solar heating system
3 Scroll to other function blocks (displayed if not all
function blocks can be displayed simultaneously)
4 This button opens an overview of all installed
function blocks. This allows the user to switch
between function blocks faster.
5 Help button. Details can be found in chapter 6.1.3
"Integrated help".
6 Settings of the selected function block
7 Date and time
8 Current outside temperature
9 Status of the remote control for the boiler (via
www.meinETA.at), see chapter 6.1.7 "meinETA
remote control"
10 System configuration

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Getting to know the control system ETAtouch controller
Several views are available for each function block. To
switch between these, tap on the symbol at
the top left. The selection of views appears.
Fig. 6-2: Selection of views
1 User interface
2 Text menu
3 Inputs and outputs menu
4 Messages menu
In the user interface, you can set the most
important and common settings. For example,
adjustment of the charging times, heating
times, room temperatures and operating modes are
contained in this list. Details can be found in chapter
6.1.1 "User interface".
The parameters of a function block are
displayed in the text menu and can be adjusted,
if necessary. See chapter 6.1.2 "Text menu".
The terminal assignment of individual
components, such as temperature sensors,
pumps and mixers, are visible within the input
and output menu, where they can be changed if
required. Also, for example, pumps and mixers can be
started in manual mode. This menu is intended for
specialists only. Details can be found in chapter 6.1.5
"Inputs and outputs".
Any hints, errors or faults are displayed in the
messages menu, see chapter 6.1.4
"Messages".
6.1.1 User interface
The user interface
The user interface is always displayed by default. If
you are in a different view, switch to the user view by
tapping the symbol (upper left) and then
selecting .
In the user interface, you can set the most important
and common settings. The display is dependent on the
selected function block. The illustrated example shows
the user interface of a heating circuit with a room
sensor.
Fig. 6-3: Heating circuit user interface
1 Operating condition and information
2 Producer for the heating circuit.
Currently, the buffer provides a feed temperature
of 25 °C to the heating circuit.
3 Current room temperature
4 On/off switch for the heating circuit
= switched on
= switched off
5 Increase or decrease the room temperature
6 Function block settings.
In this menu, the settings and functions most
commonly used can be stored. For the heating
circuit, for example, the heating times and the
heating curve are adjusted here.
7 Graphic display of the heating times and room
temperatures settings
8 Different operating modes of the heating circuit