eta VR 250 User manual

2020-12-17
EN
0000000421
V.005
3400
939054-001
Moving-grate boiler
250 kW
Installation

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
1.4 Dismantling, disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 De-ashing system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.3 Energy Labelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3 Regulations, standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 CE-Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Boiler room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.2 Safety devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6.3 Emergency stop switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6.4 Safety devices in the fuel path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7 Information for installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1 Chimney. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1.1 Planning and layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.1.2 Renovation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.3 Water hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.4 Bleeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.5 Corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.6 Pressure equalisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8 Buffer storage tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
9 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.1 Preparing the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.2 Preparing the combustion chamber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9.3 Grate ash screw. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
9.4 Connecting the combustion chamber and heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
9.5 Piping between the combustion chamber and the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.6 Draught fan and flue connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
9.7 Flue gas recirculation piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.8 Cross ash screw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.9 Heat exchanger ash screws. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
9.10 Ignition fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.11 Temperature sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.12 Installing safety devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
9.13 Fuel conveyor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

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9.14 External ash removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.14.1 De-ashing with downpipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
9.14.2 De-ashing with ash flap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
10 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
11 Fuel store . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
11.1 Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
11.2 Dimensioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
11.3 Tilted floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
11.4 Pellet operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
11.5 Heating value . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
11.6 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

General Preface
5
1 General
1.1 Preface
Dear customer,
Safe and satisfactory operation of the product
depends, above all, on correct installation. In this user
manual, you can find out all the important installation
steps, information and instructions for this product
beforehand. 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 profes-
sional 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.
Training the customer
To avoid errors in operation, please explain to your
customer exactly how his new product works and how
it should be operated and maintained.
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, see 10
"Electrical connections".
Extended warranty
We grant an extended warranty if the product is com-
missioned by our own customer service technicians.
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.
Installation and commissioning by specialist
personnel
Installation and commissioning of the boiler may
only be carried out by specialist personnel who
have been trained by ETA.
After commissioning, fill out the commissioning form or
the checklist supplied and return it to ETA.
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.
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
event of contradictions between individual documents
regarding delivery scope, the information in our current
price list applies.
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.

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Warranty, guarantee and liability General
DANGER!
On non-compliance with this safety instruction, there is
a risk of major physical injury.
Explanation of pictograms
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 3,000 hours at full load per year
The boiler described in this user manual may only be
used for heating and producing hot water. It has a
maximum annual runtime of 3,000 hours at full load.
Installation of the boiler
The boiler may only be installed in dry surroundings.
The permitted ambient temperatures are between 5
and 30 °C.
The boiler may only be installed on a flat, non-
combustible surface. The distance of flammable
materials in the immediate vicinity of the boiler must be
heeded in accordance with national regulations.
Switch the boiler on/off with the mains
switch.
Perform a visual check of the components.
Clean the components with a soft cloth, for
example.
Remove deposits with a vacuum cleaner or
an ash vacuum.
Remove deposits with the poker.
Remove deposits with the cleaning brush.
Replace the wear parts (e.g., seals) with new
items.
Lubricate the components. The lubricant to
use is listed in the respective step.
Mount the components (e.g., screws or nuts)
by hand only, without tools.
Tighten the components (e.g., screws or
nuts) with a tool.
Install the components with some force (e.g.,
the retaining tube or the Lambda probe).
Handle the components carefully, since they
break very easily.
Measure or check dimensions or clearances
on the components.
Mark the components so that the correct po-
sition can be determined, for example, when
mounting.
Wear a protective mask to avoid damage to
the airways.
Seal the components. The sealant to be
used is listed in the respective step.
Use adhesive to affix the seals, for example.
Only blow out the components with your
mouth.
Affix a seal. The required cross-section and
sealing material are stated in each step.
Tighten screws and nuts alternately and
evenly.
Do not use compressed air to clean the com-
ponents.
Do not use cleaning brushes to clean the
components.
Do not use an ash vacuum or vacuum clean-
er.
Do not lubricate the components.
No water or moisture in this area.
No leaks in the components, e.g. screw con-
nection or maintenance cover.

General Warranty, guarantee and liability
7
Observe local building and fire safety regulations
Local building and fire safety regulations must be
observed.
Suitable fuel
• Wood chips according EN ISO 17225-4:2014,
quality classes A1/A2/B1/B2, size P16S-P31S,
maximum water content 40% (M40)
• Wood pellets according EN ISO 17225-2:2014,
quality class A1, ENplus-A1
Operation with unsuitable fuels, in particular
those with high-slag pellets (such as from grain
waste) or miscanthus, is not permitted.
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 propel-
lants, 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 7.3
"Water hardness".
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.
Install two safety valves and two thermal
discharge valves
Two safety valves (activated at 3 bar) must be installed
as protection against overpressure. The plant operator
must install two thermal discharge valves with a
activation temperature of 97°C maximum (approved
as per EN 14597).
As an option, the boiler may be operated at a
maximum operating pressure of 6 bar. For this, all
other system components also have to be designed for
this higher operating pressure.
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.
Ensure sufficient bleeding of the system
Open expansion tanks or underfloor heating with
permeable piping have a high air intake, resulting in
above-average boiler corrosion. Corrosion damage to
the boiler due to insufficient bleeding or high air intake
is excluded from warranty, guarantee and liability.
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 thermo-
stats.
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 conse-
quential damages resulting from this cause from our
warranty, guarantee and liability.

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Dismantling, disposal General
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.
1.4 Dismantling, disposal
Dismantling
Before dismantling:
• Stop heating. Switch off the boiler with the mains
switch and ensure that it cannot be switched back
on.
• Disconnect the boiler (and possibly also the fuel
conveying system) from all power sources.
Dismantling is done in the reverse order of assembly.
Clean the parts and remove them in accordance with
the local regulations for workplace safety and environ-
mental protection.
Disposal
Disposal including all components must be done in an
environmentally friendly manner according to waste
disposal laws. Recycle any materials that can be
recycled.

General Dismantling, disposal
9

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Boiler Technical data
2 Technical data
2.1 Boiler
Data sheet for moving-grate boiler 250 kW
1 Flow with DN50 connecting flange
2 Return with DN50 connecting flange
3 Safety heat exchanger of the grate duct, connection R1/2“ inside thread
4 Safety heat exchanger for heat exchanger, connection R1/2“ inside thread
5 Discharge with coupling R1" (below cover)
6 Flue tube connector pivotable in 45° steps
7 Connection for safety valve R5/4“
8 De-ashing connection (left or right)

Technical data Boiler
11
The flue gas connection on the boiler does not yet give any indication of the required chimney diameter.
Information on the required chimney diameter can be found in the installation instructions for the boiler in the
Chimney chapter.
Moving-grate boiler Unit 250 kW
Rated capacity, wood chips M25 BD 150 (W25-S160) kW 74.9 - 249.9
Rated capacity of pellets kW 74.9 - 249.9
Efficiency with spruce wood chips at partial/full load %92.6 / 92.8
Efficiency with pellets at partial/full load %92.4 / 92.7
Retort transport dimensions W x D x H mm 1375 x 1685 x 1890
Heat exchanger transport dimensions W x D x H mm 1240 x 1300 x 2210
Weight of the retort kg 1850
Weight of heat exchanger kg 1060
Weight of one-chamber rotary valve with stoker kg 124
Total weight kg 3144
Water content litres 540
Water-side pressure drop (∆T = 20K) Pa / mWs 2400 / 0.24
Flue gas mass flow rate with spruce wood chips at full load g / s 138
Flue gas mass flow rate with pellets at full load g / s 140
CO2 content in dry exhaust gas partial/full load %12.5 / 14.7
Exhaust temperature at partial / full load °C 80 / 130
Required flue draught Pa > 5
Carbon monoxide (CO) emissions with wood chips at partial/full
load
mg/MJ 8 / 1
mg/m³
(13% O2)12 / 2
Dust emissions with wood chips at partial/full load
mg/MJ 7 / 7
mg/m³
(13% O2)10 / 10
Unburned hydrocarbon emissions (CxHy) with wood chips at par-
tial/full load
mg/MJ 1.3 / < 2
mg/m³
(13% O2)2 /< 2
Carbon monoxide (CO) emissions with pellets at partial/full load
mg/MJ 21 / 4
mg/m³
(13% O2)31 / 6
Dust emissions with pellets at partial/full load
mg/MJ 5 / 7
mg/m³
(13% O2)8 / 10
Unburned hydrocarbons (CxHy) with pellets at partial/full load
mg/MJ < 2 / < 2
mg/m³
(13% O2)< 3 / < 2
Electrical power consumption in ready mode W19
Maximum permissible operating pressure bar 6
Temperature adjustment range °C 70 – 95
Maximum permissible operating temperature °C 95
Minimum return temperature °C 60°C for wood chips, 55°C for
pellets
Boiler class 5 acc. to EN 303-5:2012

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De-ashing system Technical data
Subject to technical changes and errors
2.2 De-ashing system
Technical data for the de-ashing system
Two variants are possible for the external de-ashing system of the boiler:
1) De-ashing with a downpipe:
The ash falls into an ash bin with 240 litre or 320 litre capacity via a downpipe. The connections for the two ash
bins are identical, so the ash bins can be exchanged later.
2) De-ashing with an ash flap:
A flap in the ejector dumps the ash into a container underneath. ETA offers an ash bin with a 770 litre or 320 litre
capacity for this purpose. With this de-ashing variant, the customer can also use a different ash bin (or
container).
Fig. 2-1: De-ashing with downpipe (with 320 litre ash bin)
Suitable fuels
Wood chips ISO 17225-4, P16S-P31S (G30-
G50), maximum water content 40%; Pellets
ISO 17225-2-A1, ENplus-A1
Electrical connection 400 V AC / 50 Hz / 16 A / 3P+N+PE
Mode of operation non-condensing
Moving-grate boiler Unit 250 kW

Technical data Energy Labelling
13
Fig. 2-2: De-ashing with an ash flap (with 770 litre ash bin)
2.3 Energy Labelling
Labelling and ecodesign requirements for solid fuel boilers (Lot 15)
The required buffer volume for the boiler can be found in the assembly instructions. All boilers already have the
temperature controller integrated, so every product is a "package-system" (boiler with temperature controller).
Moving grate boiler HACK VR 250-500 kW
Unit Model identification
VR 250 VR 333 VR 350 VR 463 VR 500
Item no. 13250 13333 13350 13463 13500
Rated heat output kW 250 333 350 463 499
Fuel supply (manual / automatic) automatic
Proportion of the partial load referred to the full load (30%
/ 50%) %30
Temperature controller integrated in the boiler (yes / no) yes
Temperature controller class VIII
Contribution of the temperature controller to the energy ef-
ficiency of the "package-system" % 5
Condensing boiler (yes / no) no
Combination boiler for hot water and heating (yes / no) no
Combined heat and power (yes / no) no
Preferred fuel Wood chips (water content 15-35%)
Maximum load kW 249.9 333 350 463 499
Partial load kW 74.9 99 105 126 135
Efficiency (in terms of gross calorific value) at maximum
load %80.6 83.6 80.9 81.0 81.0
Efficiency (in terms of gross calorific value) at partial load %80.5 83.8 81.2 81.7 81.9
Electrical power consumption at maximum load kW 0.817 1.449 1.578 2.711 2.711

14 www.eta.co.at
Energy Labelling Technical data
Tab. 2-1: Product data according to EU Regulation 2015/
1187 and 2015/1189
Electrical power consumption at partial load kW 0.178 0.223 0.232 0.313 0.313
Electrical power consumption in ready mode kW 0.019 0.028 0.029 0.045 0.045
Seasonal space heating energy efficiency ηs %77 77 77 78 78
Seasonal space heating emissions - particulate matter mg/m³
(10% O2)<40 <40 <40 <40 <40
Seasonal space heating emissions - organic gaseous
compounds
mg/m³
(10% O2)<20 <20 <20 <20 <20
Seasonal space heating emissions - carbon monoxide mg/m³
(10% O2)<500 <500 <500 <500 <500
Seasonal space heating emissions - nitrogen oxides mg/m³
(10% O2)<200 <200 <200 <200 <200
Other suitable fuel Pellets
Maximum load kW 249.9 333 350 463 499
Partial load kW 74.9 99 105 126 135
Efficiency (in terms of gross calorific value) at maximum
load %82.3 83.0 83.0 83.2 83.3
Efficiency (in terms of gross calorific value) at partial load %82.4 83.0 83.1 83.7 83.8
Electrical power consumption at maximum load kW 0.897 1.446 1.558 2.543 2.543
Electrical power consumption at partial load kW 0.220 0.229 0.231 0.248 0.248
Electrical power consumption in ready mode kW 0.019 0.028 0.029 0.045 0.045
Seasonal space heating energy efficiency ηs %79 79 79 80 80
Seasonal space heating emissions - particulate matter mg/m³
(10% O2)<40 <40 <40 <40 <40
Seasonal space heating emissions - organic gaseous
compounds
mg/m³
(10% O2)<20 <20 <20 <20 <20
Seasonal space heating emissions - carbon monoxide mg/m³
(10% O2)<500 <500 <500 <500 <500
Seasonal space heating emissions - nitrogen oxides mg/m³
(10% O2)<200 <200 <200 <200 <200
Moving grate boiler HACK VR 250-500 kW
Unit Model identification
VR 250 VR 333 VR 350 VR 463 VR 500

Regulations, standards and guidelines
15
3 Regulations, standards and guidelines
Regulations
• Local building regulations
• Industrial and fire safety ordinances and
regulations
• State fire regulations
• In Germany, the EnEG (Energy Saving Act) with its
enacted EnEV ordinances for energy-saving
insulation and energy-saving building technologies
• In Germany, 1.BImSchV, initial ordinance for
enforcement of the federal pollution control act for
small-scale furnaces
• In Austria, Article 15 a, agreement on protective
measures regarding small-scale furnaces
• In Austria, Article 15 a, "Agreement on saving
energy"
• In Austria, "TRVB H 118 - Technical Directives for
Preventive Fire Safety"
• In Switzerland, VKF/AEAI fire safety regulations
25-03 and 106-03
Standards and guidelines
• ÖNORM H 5195-1 "Prevention of damage due to
corrosion and scaling in closed hot-water heating
systems".
The permissible water hardness for the heating
water can be determined from the table in Section
7.3 "Water hardness".
The requirements of ÖNORM H 5195-1 apply
as minimum requirements for the heating
water. If stricter country-specific regulations exist,
they are to be heeded.
• VDI 2035, "Prevention of damage due to corrosion
and scaling in hot-water heating systems with feed
temperatures up to 120 °C".
• EN 12828 "Heating systems in buildings –
planning for hot-water heating systems".
A safety temperature limiter (for combustion
chamber and heat exchanger), a pressure sensor
and a minimum pressure limiter are built into the
boiler.
A sufficiently large expansion tank (at least 10% of
the system volume) or a pressure maintaining de-
vice, as well as 2 safety valves and 2 thermal relief
valves must be installed on site. The outlets for the
safety valve and the thermal relief valve must be
routed to a sewer connection.
• EN 12831 "Heating systems in buildings - method
for calculating standard heating load"
• EN 13384 "Flue systems - thermal and fluid-
dynamic calculation methods"
• In Germany, DIN 18160 "Flue systems – planning
and design"
• In Austria, ÖNORM H 5170 "Heating systems –
construction and fire safety requirements"
Regular emissions measurement for commercial
heating plants over 50 kW
Regular emission measurements are prescribed in
Austria for all commercial heating systems over 50 kW
(see Combustion Plant Ordinance).

16 www.eta.co.at
CE-Conformity
4 CE-Conformity
CE declaration of conformity
We hereby declare that the product in its standard design as stated here corresponds to the above provisions. The
technical documentation for this product is administered by ETA Heiztechnik GmbH.
Manufacturer: ETA Heiztechnik GmbH
4716 Hofkirchen an der Trattnach, Gewerbepark 1, Austria
Product: Wood Chip Boiler with fuel conveying system
Types: ETA HACK VR 250 - 500 kW
EU Directives:
2014/30/EU Directive relating to electromagnetic compatibility (EMC Directive)
2006/42/EC Machinery Directive
2014/35/EU Directive relating to electrical equipment designed for use within certain voltage limits
(Low Voltage Directive)
2011/65/EU Directive on the restriction of the use of certain hazardous substances in electrical and
electronic equipment (RoHS 2 guideline)
Applied standards:
EN-303-5:2012 Heating boilers -
Part 5: Heating boilers for solid fuels, manually and automatically stoked, nominal heat
output of up to 500 kW - Terminology, requirements, testing and marking
EN ISO 12100:2011 Safety of machinery -
General principles for design - risk assessment and risk reduction
EN 60335-1:2012 Household and similar electrical appliances - Safety
Part 1: General requirements
EN 60335-2-102:2016 Household and similar electrical appliances - Safety
Part 2-102: Particular requirements for gas, oil and solid-fuel burning appliances having
electrical connections
IEC 61000-6 1/2:2005 Electromagnetic compatibility (EMC):
Generic standards - Immunity for residential, commercial and light-industrial environments
(1) and industrial environments (2)
IEC 61000-6 3/4:2011
+ A1:2011
Electromagnetic compatibility (EMC):
Generic standards - Emission standard for residential, commercial and light-industrial en-
vironments (3) and industrial environments (4)
Applied National Standards:
DIN 4702 Heating boilers, Part 1 and 4
Hofkirchen, 31/10/2018 Ing. Johann Eibelhuber
Quality assurance
DI Ferdinand Tischler
Management

Boiler room
17
5 Boiler room
Installation of the boiler
The boiler may only be installed in dry surroundings.
The permitted ambient temperatures are between 5
and 30 °C.
The boiler may only be installed on a flat, non-
combustible surface. The distance of flammable
materials in the immediate vicinity of the boiler must be
heeded in accordance with national regulations.
Requirements for the boiler room
Boiler rooms must be built with fire-resistant F90
(EI90) walls and ceilings; in Switzerland El30 up to 70
kW and EI60 over 70 kW.
An escape door to a corridor or to the outside is
required. The door F30 (El30) must open in the
direction of escape and be self-closing with a tight
seal. Boiler room doors that open onto escape routes
must be EI90 (F90).
The boiler room must feature air inlet and outlet vents
with minimum diameters for the boiler.
To prevent flue gases from escaping, it must be
ensured that negative-pressure does not occur in the
boiler room. Building installations, such as suction for
the ventilation system or installed compressors, for
example, are thus not permissible.
Floor characteristics
The boiler and the external ash removal may only be
installed on a flat, non-combustible floor. The floor
must be capable of supporting the boiler's weight. For
more information see the chapter 2 "Technical data".
Sufficient lighting in boiler room
The boiler room must have lighting sufficient for the in-
stallation and commissioning of the boiler.
There must be no heating appliances in the vicinity
of escape routes
Boilers may not be installed in stairwells, corridors or
rooms through which escape routes lead to the
outside.
Free minimum cross sections for the air intake
openings
The boiler requires air for combustion. That is why free
minimum cross sections are required in the boiler room
for the air intake openings. In Austria, these are
defined in ÖNORM H 5170, see the following table.
Tab. 5-1: free minimum cross sections
A protection grille at the air intake opening also
reduces the free cross section. Therefore, the air
inlet opening must be larger depending on the
protection grill. In air ducts through channels a
calculation by a specialist is required.
The values listed may vary from country-specific and
national regulations. Enquire about it at your authori-
ties. If no rules exist, we recommend the Austrian
minimum cross sections to use as a guide.
Too small-sized air inlet openings may result to
low pressure in the boiler room. This can lead to
a reduction of the boiler output, as well as to an exit of
flue gas in the boiler room.
Boilers that are operated with an external air
supply require no further supply air and outlet
openings in the boiler room.
Boiler
output
[kW]
Free minimum cross sections in cm²
Austria
(specifica-
tion from
ETA)
Germany Switzer-
land
20 400 150 206
30 400 150 309
40 400 150 412
50 400 150 515
60 400 170 618
70 400 190 721
90 400 230 927
110 440 270 1133
130 520 310 1339
180 720 410 1854
200 800 450 2060
350 1400 750 3605
500 2000 1050 5150

18 www.eta.co.at
General information Safety
6 Safety
6.1 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 doc-
umentation 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 extin-
guisher 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. 6-1: 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!
WARNING!
Danger of fire due to hot parts
Even after the boiler has been switched off,
there is still danger of fire and burns from all
cleaning and maintenance covers since
they cool off more slowly.
No flammable objects or materials may be directly
next to the boiler and the flue gas piping.
6.2 Safety devices
Pump safety run, automatic heat dissipation at
overtemperature
If the boiler temperature exceeds 95 °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 (STB) and the thermal
relief valve.
Heat dissipation is limited by the maximum feed
temperature set in the heating circuits and the
target hot water temperature.
Install thermal emergency cooling valves on the
heat exchanger and boiler body
One safety heat exchanger is installed in the
combustion chamber and one in the heat exchanger.
The plant operator must connect these to a cold water
supply via thermal emergency cooling valves. This
protects the boiler from overheating in the event of

Safety Safety devices
19
pump failure. The minimum pressure in the cold water
pipe must be 2 bar and the temperature must not
exceed 15 °C.
Fig. 6-2: Thermal emergency cooling valve
Both thermal emergency cooling valves must be
installed in the cold water supply pipe, so that the
boiler's safety heat exchangers are not continually
under pressure.
Only thermal emergency cooling valves that
correspond to the standard DIN EN 14597 (or
comparable standards) may be installed. They must
activate at 100 °C and have a flow rate of at least
2.0 m³/h. The clear width of the cold water supply and
outlet may not fall below the nominal diameter of the
safety heat exchanger.
To prevent the cold water supply from being inadver-
tently shut off, remove the levers from the ball valves
or the hand wheels from the valves and attach them to
the fitting with a piece of wire.
WARNING!
The outlet from the thermal emergency cooling valve
must be directed to the sewer via an easily visible,
open flow path (siphon funnel), so that malfunctions -
especially a non-closing valve - can be recognised.
Fig. 6-3: Connections for thermal emergency cooling valve
on the heat exchanger
The connection for the temperature sensor of the
thermal emergency cooling valve is situated behind
the cover in the panel.
Fig. 6-4: Connection for temperature sensor of the thermal
emergency cooling valve on the heat exchanger
A separate thermal emergency cooling valve must be
installed for the combustion chamber. The connection
for the temperature sensor of the thermal emergency
cooling valve is situated next to the connection for the
safety heat exchanger.
Fig.6-5:Connections forthermal emergencycooling valveof
the combustion chamber
CAUTION!
In order to measure the correct temperature, the
temperature sensors for the two thermal emergency
cooling valves must be fully inserted into the
immersion sleeves.

20 www.eta.co.at
Safety devices Safety
Installing safety valves
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. 6-6: 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.
Install the safety valve at the highest point of the heat
producer or in the flow pipe close to the heat producer.
Only in this way can it discharge heat by blowing out
hot water and steam.
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.
The safety valve must be installed on the boiler flow. A
connection is already available for this purpose.
Fig. 6-7: Connection for safety valve on flow
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.
Shutdown by the safety temperature limiter (STB)
The heat exchanger and combustion chamber is each
equipped with its own safety temperature limiter as
additional protection against boiler overheating. If a
temperature of 105°C (tolerance 100 to 106°C) is
reached, the safety temperature limiters cut off the flow
to the draught fan and stop the fuel feed. An alarm
message appears on the screen. If the temperature
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