eta Flex User manual

2020-09-30
EN
0000000487
V.002
X.49.0
939110-001
Pellet conveyor
"Flex"
Operating Instructions

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Warranty, guarantee and liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3 Dismantling, disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1 Note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Tilted floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2 Attaching pellet hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3 Pellet store . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Concluding activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6 ETAtouch controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.1 [Pellet store] function block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7 Noise emission. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Pellet store . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.2 Requirements for pellet store. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.3 Calculating pellet supply and store size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.4 Filling nozzles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8.5 No cables/pipes in the pellet store . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
8.6 Tilted floor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.7 Information about pellet hoses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.8 Fire safety regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.9 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

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General information General
1 General
1.1 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.
Software Description
The software version described in this documentation
corresponds to the version valid at the time of publica-
tion. 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 au-
thorisation, the required files can be found at
"www.eta.co.at".
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.
DANGER!
On non-compliance with this safety instruction, there is
a risk of major physical injury.
Explanation of pictograms
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.

General Warranty, guarantee and liability
5
1.2 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.
Observe local building and fire safety regulations
Local building and fire safety regulations must be
observed.
Suitable fuel
The boiler is suitable for use with wood pellets
according to EN ISO 17225-2:2014, quality class A1,
ENplus-A1. Operation with unsuitable fuels, in
particular those containing halogens (chlorine) or high-
slag pellets such as from grain waste, is not permitted.
Installation in a dry, frost-proof room
A dry, frost-proof room is required for the installation.
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.
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.
1.3 Dismantling, disposal
Dismantling
Dismantling takes place in reverse order to the instal-
lation. Clean the components and properly dismantle
them in accordance with the local regulations for
workplace safety and environmental 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.
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.

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Description
2 Description
Pellet Conveyor Layout
This pellet conveyor is modular and can be used for storage rooms with a maximum length of 6 m. In the plastic
channel there is a shaftless screw conveyor for low-noise operation. To avoid damage, it is not permitted to turn the
screw conveyor against the conveying direction.
1 End piece of the channel (with internal pipe)
2 Supporting part (between all channels)
3 open channel (can be shortened on site)
4 Wall duct for maximum 300 mm thick walls (can be shortened on site)
5 Fire protection sleeve (for the wall duct from the pellet store to the installation room)
6 Transfer coupling
7 Conveying system drive
8 Shaftless screw conveyor (can be shortened on site)

Description
7
The pipe for the wall duct must protrude a little on each side for the installation of the fire protection sleeve,
supporting part and the transfer coupling. This results in storeroom lengths (uncut) in 0.5 m increments. The troughs
can be shortened on site, so any storeroom length up to 6 m is possible. The following illustration shows a conveying
system with a length of 3 m. With an additional trough, the conveying system would be 0.5 m longer.
Fig. 2-1: Example: conveying system with 3 m length
The open troughs and the pipe of the wall duct can be shortened on site. This allows the length of the conveying
system to be easily and precisely adapted to an existing room. After shortening the troughs, the screw conveyor
must also be shortened accordingly.
The conveying system is placed centrally (in width) in the storeroom. A round or rectangular section is required for
the wall duct. See the following illustration.
Fig. 2-2: Required opening for the wall duct

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Note Description
2.1 Note
Installation tips for thicker walls
This pellet conveying system is designed for wall
thicknesses of up to 30 cm. For thicker walls, the fire
protection sleeve can be rotated 180° and mounted
inside the wall, provided the opening is large enough.
This is possible for walls up to 36 cm in thickness.
Fig. 2-3: Fire protection sleeve installed inside the wall
If the walls are much thicker, the duct can also be
located inside the wall. As protection against foreign
bodies in the screw conveyor (e.g., loose brickwork
crumbling down from above), the duct inside the wall
must be covered with the supplied cover plate or
something similar.
Fig. 2-4: Cover plate
Fill the cavity in the wall above the screw conveyor with
mineral wool to reduce noise. Cut the supplied metal
covers to fit over the ducts and install metal covers in
the storeroom.
Fig. 2-5: Metal covers
Storerooms with uneven floors
The conveying system is mounted horizontally in the
storeroom. Small shim plates are supplied for the
supporting parts to compensate for small differences in
height. Larger differences in height can also be
compensated for example by underlaying wooden
boards, laminated panels or formwork panels.
However, wood for the underlay may only be used in a
storeroom with a dry floor. Otherwise, the wood may
swell and cause damage.
Fig. 2-6: level out uneven flooring
Wooden boards to compensate for height differences
can also be laid longitudinally over the whole length.
With these varieties the supporting parts can be
fastened to the wooden boards, as long as they are

Description Note
9
sufficiently thick (more than 30 mm). The wooden
boards (or panels) themselves are fixed to the floor
with suitable screws.
The thickness of the wooden boards (or panels)
must be taken into account when creating the
opening for the wall duct.
Storerooms with sealed floors
If the conveying system is installed in a storeroom with
a sealed floor (i.e,. a floor in which no holes may be
drilled), then fix the supporting parts for the ducts for
example to wooden boards, laminated panels or
formwork panels, and screw these to the slanted floor.
This avoids drilling holes in the sealed floor. The
conveying system and the supporting parts are thus
"floating" in the storeroom.
Fig. 2-7: Installation example with a sealed floor
The thickness of the wooden boards (or panels)
must be taken into account when creating the
opening for the wall duct.

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Installation
3 Installation
Assembly and installation only by qualified
specialist personnel
The assembly and installation may be performed
by specialist personnel with the corresponding
qualifications only.
Creating an opening for the wall duct
Mark the required opening for the wall duct in the
middle of the storeroom width. A square or round
section can be created; see the following illustration.
Fig. 3-1: Required opening for the wall duct
The conveying system is mounted horizontally in the
storeroom. Small shim plates are supplied for the
supporting parts to compensate for small differences in
height. For larger differences in height, please refer to
chapter 2.1 "Note".
Fig. 3-2: Shim plates
Check the evenness of the floor in the storage room
before making the opening. Also check the floor level
inside and outside the storeroom. If the floor level in
the storeroom is lower than outside, this must be taken
into account when creating the opening for the wall
duct.
Once the correct position is determined, create the
opening for the wall duct.
Fig. 3-3: Position
Mounting the transfer coupling in the wall duct
In the storeroom, fix the metal cover with the supplied
window frame screws. These screws are mounted
directly in the wall without dowels. Drill a 6 mm hole in
a brick wall and a 6.5 mm hole in a concrete wall.
Fig. 3-4: Metal cover
This metal cover is not required for precise core
drilling in the wall.