eta 939058-001 User manual

2021-02-22
EN
0000000432
V.004
X.51.0
939058-001
Heat transfer station
15 - 75 kW
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

3
Contents
1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Warranty, guarantee and liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 CE-Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.1 Heat flow meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.2 Example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1 Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.2 CAN bus installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
6.3 Circuit board GM-C3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
6.4 NT-10VA circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
6.5 Heat flow meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
7 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.1 Filling the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.2 Setting the flow rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2.1 Primary side characteristic curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
7.2.2 Determination of volume flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
7.2.3 Example calculation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.3 Concluding activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8 Rectifying problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9 Water hardness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10 ETAtouch controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10.1 Function block [handover module] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10.1.1 Text menu - Adjustable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
10.2 Software update. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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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.
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.
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".
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.
Installation in a dry, frost-proof room
A dry, frost-proof room is required for the installation.
pH value between 8 and 9
The pH value of water used to fill the heating system
must be between 8 and 9.
Frost protection for the secondary side
The maximum frost protection content must be
adjusted to the local conditions and checked on an
annual basis if frost protection is required, for example,
on the secondary side for outdoor heating systems.
Permissible water hardness
In order to protect the heat exchanger from calcifica-
tion, the water hardness of the heating water must be
taken into account. Observe the indications outlined in
ÖNORM H 5195-1, see 9 "Water hardness".
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.
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.
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.
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.
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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CE-Conformity
2 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
sole responsibility for issuing this declaration of conformity lies with the manufacturer. The technical documentation
for this product is managed by ETA Heiztechnik GmbH. Signed for and on behalf of:
Manufacturer: ETA Heiztechnik GmbH
4716 Hofkirchen an der Trattnach, Gewerbepark 1, Austria
Product: Heat transfer module, heat transfer station
Types: ETA heat transfer module
EU Directives:
2014/30/EU Directive relating to electromagnetic compatibility (EMC 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 60335-1:2020 Household and similar electrical appliances - Safety -
Part 1: General requirements
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)
Hofkirchen, 12/01/2021 Ing. Johann Eibelhuber
Quality assurance
DI Ferdinand Tischler
Management

Description
7
3 Description
Connections and components
1 Return for primary side and connection for discharge
2 Flow for primary side
3 Flow for secondary side
4 Return for secondary side
5 Primary valve with pressure-independent flow limiter
6 Strainer for secondary side and connection for discharge
7 Actuator for primary valve
8 Strainer for primary side
9 Bleed screw for primary side
10 Safety valve with 3 bar opening pressure
11 Circuit board [GM-C]
12 Adapter for optional heat meter
The connections for the secondary circuit can also be guided out of the top of the heat transfer station.

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Description
Dimensions
Technical data
Type
Number of
plates in
heat ex-
changer
Maximum output [kW],
(see practical example)
Prima-
ry
valve
Primary side Secondary side Weight
[kg]
1 2 3 4 Kvs
[m³/h]
Vmax
[m³/h] PN DN Vmax [m³/h] PN DN
15 16 22 9 18 8 1.6 0.40 16 G1" 0.90 6 Rp 1" 45
30 26 35 17 30 12 1.6 0.63 16 G1" 1.41 6Rp 1" 47
40 36 54 25 45 18 2.5 0.98 16 G1" 2.14 6 Rp 1" 49
60 50 83 36 65 25 41.57 16 G1" 2.96 6Rp 1 ¼" 51
75 60 101 43 95 30 6.3 2.46 16 G1" 3.54 6 Rp 1 ¼" 53
Practical examples for dimensioning
Example Primary side Secondary side
Network type Flow Return Heating system Flow Return
1District heating
network 90 °C 42 °C Radiators with or without buffer stor-
age tank 65 °C 40 °C
2Micro network
with ETA boiler 75 °C 43 °C Radiators with or without buffer stor- age tank 65 °C 40 °C
3Micro network
with ETA boiler 75 °C 36 °C Underfloor heating with mixer and/or
buffer storage tank 65 °C 28 °C
4Micro network
with ETA boiler 75 °C 33 °C Underfloor heating directly on heat exchanger a35 °C 28 °C
a. For underfloor heating which is connected directly to the heat exchanger the maximum output is primarily limited by the pressure
drop (maximum 2 mWs) via the heat transfer station

Description
9
Mode of operation
The heat supplied by the heat producer reaches the
primary valve on the underside of the heat transfer
station. This valve is preset and thus can limit the
maximum flow rate. The flow rate is adjusted during
commissioning.
Fig. 3-1: Primary circuit
The secondary side, i.e. the consumers, receive heat
via the heat exchanger. A pump must be installed on
site for the secondary side.
Fig. 3-2: Secondary circuit
The heat transfer station is controlled via a CAN-bus
connection to an existing ETAtouch control system. A
stand-alone solution with a separate ETAtouch control
panel is also possible. Power is supplied via a 230 V
Schuko socket.
The return temperature can also be limited with
the optional heat meter for the primary side. This
does not replace hydraulic calibration, however.
Also possible is a restriction of the flow rate of the pri-
mary circuit in the heat exchanger through the prima-
ry valve. This enables temperature management of the
primary side.
Ball valves with integrated thermometer
The ball valves are opened or closed by turning the
thermometer. The markings show the current position.
Fig. 3-3: Ball valve open
Fig. 3-4: Ball valve closed

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Installation
4 Installation
Mounting the heat transfer station on the wall
Remove the front cover and the insulation on the
bottom.
Fig. 4-1: Front cover
Fig. 4-2: Insulation
Fit the wall mount with suitable screws and hang the
heat transfer station in the mount. Note the dimensions
of the heat transfer station and the required clearances
for maintenance; see diagram "Dimensions".
Fig. 4-3: Wall mount
Secure the heat transfer station to the wall mount with
a screw.
Fig. 4-4: Screw

Installation
11
Align the heat transfer station vertically to the wall with
the help of the setting screws.
Fig. 4-5: Set screws
Set a clearance of approx. 5 - 15 mm to the wall so that
the insulation can be mounted properly.
Fig. 4-6: Distance to the wall
Mounting the connections
Mount the connections for the primary circuit on the
heat transfer station. The return is equipped with an
emptying device.
Fig. 4-7: Connections for primary circuit
Then mount the connections for the secondary circuit.
Make sure that the flow and return are properly
positioned.
Fig. 4-8: Connections for secondary circuit

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Installation
Turning the connections for the secondary side
If required, the connections (flow and return) for the
secondary side can also be guided out of the top of the
heat transfer station. See the following illustrations for
this. Seals must be attached to all screw joints.
Fig. 4-9: Dismantling the piping
Fig. 4-10: Piping led out at the top
Installing outlet pipes for the safety valve
A safety valve with 3 bar opening pressure has already
been installed for the secondary circuit at the factory.
The outlet is already guided to the bottom of the heat
transfer station in a pipe. Connect the safety valve
outlet to this pipe.
Fig. 4-11: Safety valve outlet
DANGER!
Safety valve outlet
The safety valve outlet must be directed to the ground
in a pipe so nobody is endangered when hot water or
steam is drained.
The safety valve outlet must be fed to the sewage
system (e.g. duct) via a clearly visible, open route
(siphon funnel). This will ensure that malfunctions,
especially a failure of the safety valve to close, can
be detected. If no connection is available to the
sewage system, the outlet must be directed to the
ground in a pipe.

Installation
13
Installing the piping
Connect the piping of the heat producer on the primary
side and the piping for the heat consumer on the
secondary side.
There is a bleed screw on the top area of the heat
transfer station for bleeding the primary side.
Fig. 4-12: Bleed valve for the primary side
A connection for a membrane expansion vessel is
available for the secondary side.
Fig. 4-13: Connection for membrane expansion vessel
For frost protection in the secondary circuit, guide
the safety valve outlet into a canister
DANGER!
Safety valve outlet
The safety valve outlet must be directed to a canister
with sufficient dimensions in a pipe so nobody is
endangered by hot water or steam.
The safety valve outlet must be directed into the
canister via a clearly visible, open route (siphon
funnel) so that malfunctions, especially a failure of
the safety valve to close, can be detected. In the
same way, the frost protection is collected when
opening the safety valve and can be filled again.

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Heat flow meter Installation
4.1 Heat flow meter
Installing the heat meter
Optionally, a heat meter can be installed in the heat
transfer station. This is available separately from ETA.
1. Remove the front cover and switch off the heat
transfer station on the mains switch.
2. Block the flow and return lines on the primary side.
3. Remove the adapter in the return line. Hot water
may leak out.
Fig. 4-14: Adapter
4. Insert the measuring unit of the heat meter. During
installation, make sure the direction of flow is
correct for the measuring unit.
Fig. 4-15: Measuring unit
5. The temperature sensors of the heat meter are
colour-coded (flow = red, return = blue). Insert
them into the immersion sleeves at the flow (red)
and return (blue) connections of the primary circuit.
Fig. 4-16: Temperature sensor
Depending on the heat meter, a return
temperature sensor may already be installed
in the measuring unit.
6. The display of the heat meter can be attached to
the front of the heat transfer station.
Fig. 4-17: Display
7. Connect the heat meter electrically. See chapter
6.5 "Heat flow meter".
8. Open the flow and return lines of the primary circuit
and bleed the primary circuit. Switch the heat
transfer station back on at the mains switch and
refit the front cover.

Configuration
15
5 Configuration
General explanation provided in the additional
document
A general description for the configuration with the
assistant is provided in the document "Control
extension - configuration". The configuration of the
individual examples is described subsequently.
Software version X.44.0 or later
The configuration requires software version X.44.0 or
later. If you have an older software version, you must
update to the current version.

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Example 1 Configuration
5.1 Example 1
Hydraulic schematic
Circuit
board
Function blocks Description
GM-C 1 HOM Heat transfer station
Settings:
Hydraulic variants Consumer with its own pump
Options:
Module is a consumer within an ETA system. Only select this option if the heat transfer
module is a consumer in an ETA heating
system. This option may not be selected for
stand-alone operation (e.g., as district heat-
ing station).
Primary valve 230VAC open/stop/closed
Primary return sensor

Configuration Example 1
17
Connections
= type [Heating water]
GM-C 1 Heating circuit Heating circuit
Settings:
HC type Underfloor heat.
Heating circuit pump Standard pump
Heating circuit mixing valve 3 point control (230 V)
Room sensor Digital
GM-C 1 HWT Hot water tank
Settings:
Charging pump Standard pump
Flow mixing valve no
Circulation pump No
GM-C 1 Sys System
Settings:
Outside temperature sensor via board input
Show external malfunction message on the
screen
No
Output all fault messages No
Circuit
board
Function blocks Description
Producers Consumers
GM-C 1: HOM: Flow GM-C 1: HC: .
GM-C 1: HW: .

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Example 1 Configuration
Terminal assignments
If the heat transfer station is a consumer in an ETA heating system, a CAN-bus connection to the ETAtouch
control must be established.
Description [GM-C 1]
Heat transfer station [HOM]
Secondary flow S500 T3
Primary valve S6
Primary return S500 T5
System [Sys]
Outside temperature sensor S501 T7
Hot water tank [HW]
Hot water tank S500 T6
Charging pump for hot water tank S3
Heating circuit [HC]
Heating circuit pump S7
Flow S502 T13
Heating circuit mixing valve S8
Room sensor S511

Configuration Example 1
19

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Example 2 Configuration
5.2 Example 2
Hydraulic schematic
Circuit
board
Function blocks Description
GM-C 1 HOM Heat transfer station
Settings:
Hydraulic variants Consumer with its own pump
Options:
Module is a consumer within an ETA system. Only select this option if the heat transfer
module is a consumer in an ETA heating
system. This option may not be selected for
stand-alone operation (e.g., as district heat-
ing station).
Primary valve 230VAC open/stop/closed
Primary return sensor
GM-C 1 Heating circuit Heating circuit
Settings:
HC type Underfloor heat.
Heating circuit pump Standard pump
Heating circuit mixing valve 3 point control (230 V)
Room sensor Digital