Technische Alternative EHS Series User manual

ta.co.at
EHS-R
ADJUSTABLE ELECTRIC IMMERSION HEATER
Installation
EnglishManual Version 1.04

Table of contents
Safety requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Wireless control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PWM control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation and connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Dimensioned drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
High limit safety cut-out (HLSC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Sensor installation, PWM input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mains connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Heating elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Wireless system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Pairing devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Transmitted values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Relaying wireless signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Reset/pairing of the . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
LED status indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Possible LED indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4
Safety requirements
This device is state of the art and meets all necessary safety regulations. It may only be used in ac-
cordance with the technical data and the safety requirements and regulations listed below. When us-
ing the device, also observe the statutory and safety regulations apposite to the particular use. Any
other use will automatically void all warranty rights.
• Connection work and other exposure of the PCB in the immersion heater casing should only be
carried out in a dry interior room.
• It must be possible to isolate the immersion heater from the mains, in accordance with local reg-
ulations, using an omnipolar isolating facility (plug/socket or 2-pole isolator).
• The immersion heater should only be connected to a mains socket using the supplied connect-
ing cable. The connecting cable should be fitted before insertion. The mains socket must have at
least 16 A fuse protection.
• No extension cables, mains distributors or cable drums should be used.
• Before starting installation or wiring work on equipment, the immersion heater must be com-
pletely isolated from the mains and protected against a restart.
• Never pull on the mains cable, or pull the mains plug out of its socket by the cable.
• Safe operation is no longer possible if the immersion heater, or connected equipment shows
signs of visual damage, no longer functions or has been stored for lengthy periods in unfavoura-
ble conditions. If this is the case, disable the devices or equipment and secure against uninten-
tional use.
• At the immersion heater, high temperatures occasionally occur during operation, which should
be taken into consideration during installation/maintenance work. Also never touch the immer-
sion heater with wet/damp hands. Insulated footwear is recommended for installation work.
• The immersion heater may be active at a high output level for a prolonged period of time. Rele-
vant components (e.g. sockets) must be able to withstand current flows of up to 16 A for pro-
longed periods.
All installation and wiring work on the controller must only be carried out in a zero
volt state. The opening, connection and commissioning of the device may only
be carried out by competent personnel. While doing so, they must observe all lo-
cal safety requirements.

5
Maintenance
If treated and used correctly, the device itself will not require any maintenance. However, the use of
a suitable sacrificial anode in the cylinder is recommended, and if the immersion heater is used more
often than usual, it is necessary to check whether the material thickness is reduced (at least 2-3
times per year).
No components relevant to long term accuracy are subject to loading if the device is used correctly.
Consequently long term drift is extremely low. The device therefore does not require any mainte-
nance and cannot be adjusted.
The structural characteristics of the device must not be changed during repairs. Spare parts must
correspond to the original parts and must be used in accordance with the build version.
Disposal
• Devices no longer in use or beyond a state of repair must be disposed of in an en-
vironmentally responsible manner by an authorised collection point. They mus nev-
er be treated as ordinary household waste.
• We can undertake the environmentally responsible disposal of devices sold by the
Technischen Alternative company upon request.
• Packaging material must be disposed of in an environmentally responsible man-
ner.
• Incorrect disposal may result in considerable damage to the environment, as
many of the materials used require professional handling.

Funktionsbeschreibung
6
Function description
The EHS immersion heater is available in two versions:
•EHS-R: With variable control from 50 W - 3000 W
•EHS: Output 0-3000 W in 750 W increments
Combining an EHS-R (controllable) with one or multiple EHS (not controllable) enables a cascade to
be set up in which the EHS-Rcarries out fine adjustment, achieving stepless power regulation.
Both versions can be controlled wirelessly from a CAN-EZ3 to control their output and exchange da-
ta.
Alternatively, the immersion heater has a PWM input to allow direct control of the output (non-wire-
lessly).
More details on the wireless system can be found in the chapter of the same name.
Programming
The EHS itself does not require any programming; its output is defined by other devices. If the immer-
sion heater is used in conjunction with freely programmable controllers, the use of the Energy man-
ager and Output control functions is recommended (more details in the instructions for the
"Functions" of the freely programmable controller).
Wireless control
For wireless control, the immersion heater must be paired with the device controlling it. If a CAN-
EZ3A and an EHS-R in the ATON set were purchased together, they have already been paired at the
factory.
More details on the wireless system can be found in the chapter of the same name.
PWM control
To operate the EHS-R without a wireless connection (e.g. in conjunction with controller UVR16x2),
the immersion heater has a PWM input. 10-90 % PWM corresponds to 0-3000 W output, but operation
only starts at min. 45 W (equates to around 12 % PWM).
Important: If an active wireless connection is available (paired and signals being received), the PWM
input is inactive. If the immersion heater is controlled via the PWM input, the wireless pairing of other
devices with the EHS-R must be deleted.
For the PWM input connection graphic, see chapter "Sensor installation, PWM input".

Installation and connection
7
Installation and connection
Dimensioned drawing
inactive length = distance from threaded head, which is not heated (120 mm)
The immersion heater must be installed horizontally in the cylinder.
With regard to the material, the immersion heater is suitable for installation in
DHW cylinders, but due to the predominant electroplating in the cylinder, less no-
ble metals than those of the immersion heater are damaged. The use of a suitable
sacrificial anode in the cylinder and regular checking of the anode (at least 2-3
times per year) is recommended. Otherwise, other inlet points in the cylinder or
the coating of the cylinder itself may be damaged.

Installation and connection
8
High limit safety cut-out (HLSC)
The EHS-R has a sensor for the high limit safety cut-out. This is a PT1000 sensor in a sensor well
between the heating elements. It is connected at the factory at the connection shown below.
When a temperature of 95 °C is reached at the STB sensor, the immersion heater is deactivated. It
can only be reactivated when the temperature falls below a value of 90 °C (= 5 K hysteresis).
The electronics temperature is also monitored. Their maximum temperature is 75 °C (5 K hysteresis).
Sensor installation, PWM input
The EHS-R has 2 sensor inputs, which are only suitable for connection of PT1000 sensors. The
measurements of these sensors are transferred via the CORA wireless connection. This establishes
the connection for PWM control. More detailed information can be found in the chapter of the same
name.

Installation and connection
9
Mains connection
Heating elements
The 3 heating elements are connected at the factory and fully wired. For any installation/mainte-
nance work, ensure correct wiring/connection.
The EHS-R has 3 heating elements:
• 750 W controllable
• 750 W not controllable
• 1500 W not controllable
The connections of the heating elements (as they are routed from the threaded head and through the
PCB) must not be interchanged. Using the screw on the edge as a guide, the connections can be iden-
tified according to the graphic below.
1750 W not controllable
21500 W not controllable
3750 W controllable
LPhase
NNeutralconductor
Pe Earth conductor

Wireless system
10
Wireless system
Principles
The wireless system comprises at least two devices (e.g. CAN-EZ3 and EHS-R), which communicate
with one another, exchange data or send firmware/function data.
The wireless range is around 1000 m outdoors, and typically 30 m in buildings (through approx. 2
walls/ceilings, depending on thickness and material). Up to 3 additional wireless-capable devices
can be used as a bridge to enable data to be exchanged under deviating conditions.
RCV-DL, GBS-F and RAS-F devices cannot be used.
Pairing devices
Two steps are carried out to pair two devices:
1. Allow pairing on the target device
2. Initiate pairing on the control device
To allow pairing on the EHS-R (= target device), double clickon the button on the casing (= 2 click
within 2 seconds). Pairing is then allowed for 5 minutes (see chapter "Reset / Pairing").
On the control device, the x2 wireless ID for the EHS-R is required for pairing.
The pairing process on other devices (control device) can be found in the corresponding operating
instructions.
If a CAN-EZ3A and an EHS-R in the ATON set were purchased together, they have already been paired
at the factory.
Transmitted values
The following values are transmitted from the EHS-R to the paired device (cannot be changed):
Fault codes
If the fault code is on 0, no fault is present. For every identified fault, the corresponding number is
totalled, as explained below.
Timeout Digital value Yes/No (Yes, if wireless connection is lost)
Current output Output that is currently being consumed by the EHS-R
Higher output level Only used for internal calculation
Lower output level
Temperature 1 Temperature at sensor input 1 (PT1000 sensor)
Temperature 2 Temperature at sensor input 2 (PT1000 sensor)
HLSC temperature Temperature of sensor for high limit safety cut-out
Electronics temperature Temperature at immersion heater PCB
Fault code If faulty operation is identified on the EHS-R, the corresponding fault
code is transmitted.
Fault code Description
+1 Faulty circuit breaker
+2 Excess temperature at HLSC
+4 Excess temperature at PCB

Wireless system
11
Relaying wireless signals
Wireless-capable devices can relay signals of other devices. All required settings for this are carried
out at the device, which transmits the signal to be relayed. The EHS-R can be used to relay wireless
signals.
If the EHS-R immersion heater receives signals via a relay, it automatically returns data via the same
relay. No settings are therefore required for the relay on the EHS-R.

Button / Status LED
12
Reset/pairing of the
The button is pressed using a narrow-tip pen.
LED status indicators
Double click (two clicks
within 2 seconds)
Allow pairing for 5 minutes (see chapter "Wireless system")
The LED flashes green rapidly for 3 seconds to confirm.
10-second click Total reset (hold until the LED shows a green light for 1 second)
Click once Reset (software restart)

Button / Status LED
13
Possible LED indicators
Control indicator Explanation
Green, steady light Set output 0 W is preset wirelessly
Green, slow flashing Set output > 0 W is preset wirelessly
Green, quick flashing
Set output > 0 W is preset via PWM input
If the LED flashes rapidly for only 3 seconds, pairing has been per-
mitted via the pushbutton.
Orange/red alternate, slow
flashing Faulty circuit breaker
Orange, steady light No wireless signal received for at least 2 minutes and no PWM sig-
nal received
Orange, slow flashing Immersion heater excess temperature (> 95 °C)
Orange, quick flashing Casing/PCB excess temperature (>75 °C)
Red, steady light Internal fault
Red, slow flashing Wireless chip error
Red, quick flashing EEPROM error

14
Technical data
Subject to technical modifications as well as typographical and printing errors. This manual is only
valid for devices with the corresponding firmware version. Our products are subject to constant tech-
nical advancement and further development. We therefore reserve the right to make changes without
prior notice. © 2019
Power consumption max. 3000W (depending on specified set output)
Nominal voltage 230V, 50 Hz
Surface heat output < 10 W/cm2
Cold zone 120mm (± 10mm)
Screw G 1 ½“
SW 65
Fuse 6,3A fast (only for adjustable heating element and electronics)
Wire size 3 x 1,5 mm2
Dimensions see „Dimensioned drawing“
PWM-input max. 10V
Sensor inputs PT1000

15
EU Declaration of conformity
Document-Nr. / Date: TA19002, 19/07/2019
Company/Manufacturer: Technische Alternative RT GmbH
Address: A-3872 Amaliendorf, Langestraße 124
This declaration of conformity is issued under the sole responsibility of the manufacturer
Product name: EHS, EHS-R
Product brand: Technische Alternative RT GmbH
Product description: Electronic immersion heater
The object of the declaration described above is in conformity with Directives:
2014/35/EU Low voltage standard
2014/30/EU Electromagnetic compatibility
2011/65/EU RoHS Restriction of the use of certain hazardous substances
Employed standards:
Position of CE - label: On packaging, manual and type label
Issuer: Technische Alternative RT GmbH
A-3872 Amaliendorf, Langestraße 124
This declaration is submitted by
Dipl.-Ing. Andreas Schneider, General manager,
19/07/2019
This declaration certifies the agreement with the named standards, contains however no warranty of
characteristics.
The security advices of included product documents are to be considered.
EN 60730-1: 2011 Automatic electrical controls for household and similar use – Part 1:
General requirements
EN 61000-6-3: 2007 Electromagnetic compatibility (EMC) - Part 6-3: Generic standards -
Emission standard for residential, commercial and light-industrial
environments
+A1: 2011
+ AC2012
EN 61000-6-2: 2005 Electromagnetic compatibility (EMC) - Part 6-2: Generic standards -
Immunity for industrial environments+ AC2005
EN 50581: 2012 Technical documentation for the assessment of electrical and elec-
tronic products with respect to the restriction of hazardous sub-
stances


Warranty conditions
Note: The following guarantee conditions do not limit the legal right to a warranty, but rather expand your rights
as a consumer.
1. Technische Alternative RT GmbH provides a one year warranty from the date of purchase for all the
devices and parts which it sells. Defects must be reported immediately upon detection and within the
guarantee period. Technical support can supply the correct solution for almost every known problem. In
this respect, contacting us immediately will help to avoid unnecessary expense and effort in
troubleshooting.
2. The guarantee includes free repair (but not the cost of on-site fault finding, removal, refitting and
shipping) due to operational and material defects which impair operation. In the event that a repair is
not economical in the opinion of Technische Alternative for reasons of cost, the goods will be replaced.
3. Not included is damage resulting from the effects of a voltage surge or abnormal ambient conditions.
Likewise, no liability can be accepted if the device defect is due to: transport damage for which we are
not responsible, incorrect assembly and installation, incorrect use, failure to observe the operating and
installation instructions or incorrect maintenance.
4. The guarantee will become void if repairs or actions are carried out by people who are not authorised to
perform them or have not been so authorised by us or if our devices are operated with spare parts,
auxiliary parts or accessories that are not considered to be original parts.
5. The defective parts must be returned to our factory with a copy of the proof of purchase and a precise
fault description. Processing is accelerated if an RMA number is requested via our homepage
www.ta.co.at. The defect must be clarified with our technical support beforehand
6. Services provided under guarantee result neither in an extension of the guarantee period nor in a
commencement of a new guarantee period. The guarantee period for fitted parts ends with the
guarantee period of the whole device.
7. Further or other claims, especially those for compensation for damage other than to the device itself,
insofar as a liability is not legally required, are excluded.
Legal notice
These installation instructions are protected by copyright.
Use outside the copyright requires the consent of Technische Alternative RT GmbH. This applies in par-
ticular to reproductions, translations and electronic media.
Technische Alternative RT GmbH
A-3872 Amaliendorf, Langestraße 124
Tel.: [phone] Fax [phone]
E-Mail: [email protected] --- www.ta.co.at --- ©2019