Null 719.450 Temperature differential controller Installation and operating instructions

SOLARTHERMIE - SOLAR THERMAL - SOLAR TÉRMICA- SOLAIRE THERMIQUE - SOLARE TERMICO
Installation and operating instructions
Temperaturedifferentialcontroller
inputs, 1 output
719450
EN
719.450 | Z01 | 06.33 | Subject to change due to technical improvements!
EN
Table of Contents
1 About this manual...................... 3
1.1 Applicability................................... 3
1.2 Users.............................................. 3
1.3 Description of symbols................... 4
2 Safety........................................... 5
2.1 Proper usage.................................. 5
2.2 Improper usage.............................. 5
2.3 Dangers during assembly and
commissioning............................... 6
2.4 Detecting faults.............................. 7
2.5 Exclusion of liability....................... 7
3 Description.................................. 9
3.1 Controller in the solar circuit.......... 9
3.2 Case overview.............................. 10
4 Installation ............................... 11
4.1 Opening/closing the case............. 11
4.2 Assembly...................................... 12
4.3 Electrical connection.................... 13
5 Display overview....................... 17
6 Commissioning ........................ 18
7 Description of the controller functions................................... 19
7.1 Switch-on/switch-off
temperature difference................ 19
7.2 Maximum storage tank
temperature................................. 19
7.3 Maximum collector temperature20
7.4 Tube collector function (F1)......... 20
7.5 Anti-freeze function (F2).............. 21
8 Operation.................................. 22
8.1 Reading the temperature values.. 22
8.2 Setting the controller................... 23
9 Maintenance.............................. 29
9.1 Fault causes.................................. 29
9.2 Testing the temperature sensors... 33
10 Dismantling and disposal......... 34
11 Legal warranty ......................... 35
12 Technical data............................ 37
These operating instructions are part of the product.
 Read these operating instructions carefully before use.
 Keep them over the entire lifetime of the product
 and pass them on to any future owner or user of this product.
719.450 | 06.33
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1
About this manual
1.1
Applicability
This manual describes the installation, commissioning,
function, operation, maintenance and dismantling of
the temperature differential controller for solar thermal
energy systems. When installing the remaining components, e.g. the solar collectors, the pump assemblies
and the storage unit, be sure to observe the appropriate
installation instructions provided by each manufacturer.
1.2
Users
Installation, commissioning, operation, maintenance and
dismantling of the controller may only be performed by
trained professional personnel. Before commissioning,
the controller must be professionally assembled and
installed by professional personnel in accordance with the
applicable regional and transregional regulations as well
as the safety instructions and general instructions within
this installation and instruction manual. The professional
personnel must be familiar with this operation manual.
The controller is maintenance-free.
Use the controller only after first thoroughly reading and
understanding this instruction manual and the safety
instructions. Adhere to all safety instructions. In the
event of any ambiguities regarding the operation and
alteration of parameters or functions, consult professional personnel.
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1.3
Description of symbols
1.3.1 The structure of the warning notices
SIGNAL WORD
Type, source and consequences of the danger!

Measures for avoiding danger.
1.3.2 Danger levels in warning notices
Danger level
Likelihood of
occurrence
Consequences
resulting from
non-compliance
Imminent
Death, serious
DANGER
threat of danger bodily injury
Possible
Death, serious
WARNING
threat of danger bodily injury
Possible
Minor
CAUTION
threat of danger bodily injury
CAUTION
Possible
Property damage
threat of danger
1.3.3 Notes
Note
Notes on easier and safer working habits.

Measures for easier and safer working habits.
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Pictogram with corresponding warning symbol.
EN
1.3.4 Other symbols and markings
Symbol
✓


•
Emphasis on
issue at hand
Meaning
Condition for action
Call to action
Result of action
List
Emphasis on issue at hand
2
Safety
2.1
Proper usage
The temperature differential controller (below called
controller) may only be used for controlling solar thermal systems within the permissible ambient conditions
(see chapter 12).
2.2
Improper usage
The controller must not be operated in the following
environments:
• outdoors
• in damp rooms
• in rooms where highly flammable gas mixtures can
occur
• in rooms in which the operation of electrical and
electronic components may cause dangers to arise
719.450| 06.33
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2.3
Dangers during assembly and commissioning
The following dangers exist during assembly / commissioning of the controller and during operation (in case
of assembly errors):
• Risk of death by electrocution
• Risk of fire due to short-circuit
• Damage to any of the constructional fire safety
measures present in the building due to incorrectly
installed cables
• Damage to the controller and connected devices
due to improper ambient conditions, inappropriate
power supply and connecting prohibited devices or
faulty devices and incorrect assembly or installation
Therefore, all safety regulations apply when working
on the mains supply. Only electricians may perform
work that requires opening the controller (such as connection work).




When laying cables, ensure that no damage occurs
to any of the constructional fire safety measures
present in the building.
Make sure that the permissible ambient conditions at the installation site are not exceeded (see
chapter 12).
Be sure to comply with the specified degree of
protection.
Factory labels and markings may not be altered,
removed or rendered unreadable.
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




Before connecting the device, make sure that the
power supply matches the specifications on the
type plate.
Make sure that all devices which are connected to
the controller conform to the technical specifications of the controller.
Secure the device against unintentional commissioning.
All work on an open controller must be performed
with the mains supply disconnected.
Protect the controller against overloading and
short-circuiting.
2.4




Detecting faults
Check the display regularly.
In case of faults, isolate the cause (see chapter 9).
As soon as it becomes evident that safe operation
is no longer possible (e.g. visible damage), remove
the device from the mains supply immediately.
Have professional personnel remedy the fault.
2.5
Exclusion of liability
The manufacturer cannot monitor the compliance to
this manual as well as the conditions and methods during the installation, operation, usage and maintenance
of the controller. Improper installation of the system
may result in damage to property and, as a result, in
bodily injury.
Therefore, we assume no responsibility and liability for
719.450| 06.33
EN
loss, damage or costs which result from or are in any
way related to incorrect installation, improper operation, incorrect execution of installation work and incorrect usage and maintenance.
Similarly, we assume no responsibility for patent right
or other right infringements of third parties caused by
usage of this controller.
The manufacturer reserves the right to make changes
to the product, technical data or assembly and operating instructions without prior notice.
719.450 | 06.33
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3
Description
3.1
Controller in the solar circuit
3.1.1 The purpose of the controller
The controller controls the pump in a solar thermal
system.
3.1.2 The structure of the solar circuit
Temperature sensor 1
(collector sensor)
Temperature difference controller



T1


Storage
tank
Collector
Solar circuit

Pump

T2

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Temperature sensor 2
(lower area of storage tank)
9
EN
3.1.3 The function of the solar circuit
The controller constantly compares the temperatures
between the collector (T1) and the lower area of the
storage tank (T) via temperature sensors. Once the
sun heats the collector and there is a temperature difference of 8 K (adjustable parameter) between the collector and the storage tank, the pump is switched on.
The pump extracts the heat transfer fluid from the
lower cooler area of the storage tank and pumps it to
the collector. The heat transfer fluid in the collector is
heated by the sun and flows back to the storage tank.
The heat transfer fluid heats the domestic water via a
heat exchanger located in the storage tank.
3.2
Case overview
Display
Display for controller operation
and system settings
Operatingswitch
The following modes of
operation
can be selected:
Operatingbuttons
- On
for commissioning
and testing for function
Arrowup
SETbutton
Arrowdown
- Auto
for normal operation
- Off
to switch-off the pumps
ƒ On
ƒ Auto
ƒ Off
10
Connections
grid, pump, temperature sensors
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4
Installation
4.1
Opening / closing the case
DANGER
Risk of death by electrocution!



Hinge grooves

Operating
buttons
Remove the controller from the power supply before
opening the case.
Make sure that the power supply cannot be unintentionally switched on.
Do not damage the case.
Only switch the power supply back on after the case
has been closed.
The top of the case is held in place by two retaining
pegs on the upper edge of the bottom half of the case
and fastened with a screw.
4.1.1 Opening the case

Loosen the screw and remove the upper case in an
upwards direction.
4.1.2 Closing the case

Screw
Upper case

Lower case

Place the upper case over the lower case at an
angle. Insert the hinge grooves into the retaining
pegs of the lower case.
Pivot the upper case down and feed the operating
buttons through the matching holes.
Fasten the case tightly with the screw.
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EN
4.2
Assembly
WARNING
Risk of electric shock and fire if assembled in a
damp environment!

Only assemble the controller in an area where the
degree of protection is sufficient.
4.2.1 Assembling the controller
CAUTION
Risk of injury and damage to the case when drilling!

Choose a suitable installation site.
Drill the upper fastening hole.
Screw in the screw.
Remove the upper case.
Hang the case in the recess .
Mark the position of the lower fastening holes ‚,ƒ.
Remove the case again.
Drill the lower fastening holes.
Hang the case up again in the recess .
Screw the case firmly using the lower fastening
holes ‚ and ƒ.
Mount the upper case.










12
719.450 | 06.33
1
105
Do not use the case as a drilling template.
2
3
116
134
137,2

EN
4.3
Electrical connection
WARNING
Risk of death by electrocution!

Remove the controller from the power supply before
opening the case.

Observe all guidelines and regulations of the local
electricity supplier.
NOTE
The device is to be connected to the grid by means
of a plug with grounding contact, or in the case of a
fixed electrical installation via a disconnection device
for complete disconnection in accordance with the
installation guidelines
4.3.1 Preparing the cable feed
Depending on the type of installation, the cables may
enter the device through the rear of the case or the
lower side of the case.
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EN
Feeding the cable through the rear of the case
(diagram 1):
WARNING
Risk of electrical shock and fire due to cables coming loose!

Install an external strain relief for the cables.

Remove the plastic flaps  from the rear side of
the case using an appropriate tool.
Feeding the cable through the lower side of
the case (diagram 2):
SET
7
Diagram 1: Cable feed from
the rear
WARNING
Risk of electrical shock and fire due to cables coming loose!

Fasten the flexible cabling to the case using the
strain-relief clamps provided.

Cut the left and right plastic flaps  using an appropriate tool and break them out of the case.
4.3.2 Connecting the cables

14
If a protective conductor is provided or required
for the pump, connect the protective conductor
to the terminal clamps of the controller. When
connecting the protective conductor, observe the
following points:
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SET
6
Diagram 2: Cable feed from
below
EN
Make sure that the grounding contact is also
connected to the controller's mains supply side.
- Each terminal may only be connected to a single
connecting wire (max 2.5 mm2).
- The terminals are suitable for connection without
sleeves; stranded wires are to be twisted (1 twist
per 20 mm)
Only use the original temperature sensors (Pt1000)
that are approved for use with the controller.
Observe the following points:
- The polarity of the sensor contacts is not important.
- Do not lay sensor cables close to 230 volt or 400
volt cables (minimum separation 100 mm).
- If inductive effects are expected, e.g. from heavy
current cables, overhead train cables, transformer
substations, radio and television devices, amateur
radio stations, microwave devices etc., then the
sensor cables must be adequately shielded.
- Sensor cables may be extended to a maximum
length of 100 m.
When using extension cables, select the following
cable cross sections:
- 0.75 mm2 up to 50 m long
- 1.5 mm2 up to 100 m long
Connect the cables in accordance with the terminal
plan.
-




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P
co rot
nd ec
uc tive
to
(o
r
pt G
io rid
na
l 1 23
1 0
(o P 5 V V~
pt u
~
)
io mp
na
2
l1 3
15 0 V
V~ ~
)
Te
m
pe
ra
tu
(lo
re
w T
er em (c sen
ol so
ar p
le r
ea er
c
of atu tor 1
)
st re
or se
ag n
e sor
ta 2
nk
)
EN
4.3.3 Terminal plan
PE PE
16
L
N
R1
N
L1
N
R1
N
T1
T2
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5
1
Display overview
2
3
D
max
4
5
88888
°C°F
1 Symbol for pump operation
2 Symbol for anti-frost function (see p.21)
3 Symbol max for maximum storage tank temperature and
maximum collector temperature (see p.19/20)
4 Display for temperature sensor, temperature readings and fault
symbols (see p.31), interruption, or "SYS" = system fault (see
p.31/32)
5 Temperature format [°C / °F] (see p.28)
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EN
6
Commissioning
6.1
Testing the pump
CAUTION
Damage to pump caused by dry operation!

Make sure that the solar circuit is filled with heat
transfer fluid.
✓ The controller case is closed.
✓ All connections are properly made.
✓ The solar energy system is filled.



Connect the mains supply.
To switch on the pump, set the operating switch to
the upper position (on).
 onappears in the display. After approx. 3 seconds on flashes in alternation with the display.
To switch off the pump, set the operating switch to
the lower position (off).
 offappears in the display. After approx. 3 seconds off flashes in alternation with the display.
CAUTION
The incorrect operating mode may cause the system to shut down or impair proper functioning!

18
After testing the pump, always set the operating
switch to automatic operation.
719.450 | 06.33
ƒ On
ƒ
ƒ
ƒ
ƒ
ƒ Off
EN

ƒ
ƒ Auto
ƒ
To set the controller in automatic operation, move
the operating switch to the middle position.
 Auto is shown in the display for approx. 3
seconds.
7
Description of the controller
functions
7.1
Switch-on / switch-off
temperature difference
The controller constantly compares the temperatures
between the collector (T1) and the lower area of the
storage tank (T2). As soon as the temperature in the
collector (T1) is 8 K (adjustable in setup  P2 [K]) higher
than the temperature in the storage tank (T2), and if
no safety limits prohibit the pump from operating, the
pump is switched on.
°C
The following display appears:
• The pump symbol is displayed
If the temperature difference falls below 4 K (adjustable in setup  P3 [K]), the pump is switched off. The
pump symbol is no longer shown in the display.
7.2
Maximum storage tank temperature
The maximum storage temperature function is to prevent the hot water tank from overheating. If the lower
area of the storage tank (T2) reaches the set maximum
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EN
storage tank temperature (factory setting of 60 °C, 
P1), charging is stopped. A temperature of 3 K below
the maximum storage tank temperature must first be
reached before charging can be resumed.
The following display appears:
max
°C
max
°C
• The display flashes max
Note: The display only shows max when temperature
sensor T2 is also selected
7.3
Maximum collector temperature
During periods of high solar irradiance, the temperature (T1) of the heat transfer fluid can exceed 130 °C.
The heat transfer fluid evaporates. In this case, the
pump is blocked for protection purposes until the
temperature drops below 127 °C.
The following display appears:
• The display flashes max
Note: The display only shows max when temperature
sensor T1 is also selected
7.4
Tube collector function (F1)
Due to its construction, the collector temperature (T1)
can only be inaccurately recorded with vacuum tube
collectors (in some cases there are no immersion sensors; the sensor is outside the collector pipe). In these
cases, the solar circuit must be briefly activated at regular intervals to transmit the actual heat from the collector pipe to the sensor (T1). If the tube collector func20
719.450 | 06.33
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tion is activated, the controller automatically switches
the pump on every 30 minutes for 30 seconds.
7.5
Anti-freeze function (F2)
If the anti-freeze function is activated, the controller
switches the pump on as soon as the collector temperature falls below +5 °C. The heat transfer fluid is
thus pumped through the collector and the system is
prevented from freezing. If the collector reaches a temperature of +7 °C, the pump is switched off again.
CAUTION
System can freeze despite the activated anti-freeze
function!
During a power outage, the anti-freeze function does
not operate.
During long-term periods of frost (due to restricted
water tank heat storage).
If collectors are mounted in locations exposed to
wind.

If frost is expected for a long-term period of time,
only operate the system with heat transfer fluid.
Standard heat transfer fluids for solar energy systems
also contain an additional corrosion inhibitor.
D
°C
The following display appears:
• The anti-freeze symbol is displayed
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EN
8
Operation
CAUTION
The incorrect operating mode may cause the system to shut down or impair proper functioning!

Make sure that the operating switch is set to automatic
operation.
On the display you can see the temperature readings
of the individual temperature sensors. The controller
settings may be set in the settings menu.
8.1


Reading the temperature values
Select the temperature sensor using the  and
 buttons (1=T1, 2=T2).
The selected temperature sensor and the current
measured temperature appear in the display.
°C
Temperature sensor T1 display
with temperature reading from
collector and active pump
°C
Temperature sensor T2 display
with temperature reading
from lower area of storage
tank and active pump
22
719.450 | 06.33
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8.2
Setting the controller
8.2.1 Using the settings menu

°C


To open the settings menu, press the SET button
for approx. 2 seconds.
 Setting P1 "storage tank maximum temperature"
is displayed.
To switch to the next setting, press the  button.
To exit the settings menu, press the  button
again until the temperature sensor and temperature reading are shown again.
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EN
8.2.2 Overview of menu settings
°C

Temperature reading (T1 or T2)
(hold down for 2 seconds)
SET

°C
°C
P1:storage tank maximum
temperature

P2:switch-on temperature
difference

P3:switch-off temperature
difference

F1:tube collector function

F2:anti-freeze function

F3:temperature format (°C / °F)

Reset

24
719.450 | 06.33
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8.2.3 Setting the storage tank maximum temperature (P1)
DANGER
Risk of scalding due to storage tank temperature
of over 60 °C!

°C
Install a thermostatic mixer in the hot water pipe
and set to a maximum 60 °C.
✓ The P1 menu is open



Press the SET button for approx. 2 seconds until the
storage tank maximum temperature flashes.
Change the storage tank maximum temperature
using the  or  buttons.
To save the value, press the SET button.
8.2.4 Setting the switch-on temperature difference (P2)
✓ The P2 menu is open



Press the SET button for approx. 2 seconds until the
switch-on temperature difference flashes.
Change the switch-on temperature difference using
the  or  buttons.
To save the value, press the SET button.
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EN
8.2.5 Setting the switch-off temperature difference (P3)
✓ The P3 menu is open



Press the SET button for approx. 2 seconds until the
switch-off temperature difference flashes.
Change the switch-off temperature difference using
the  or  buttons.
To save the value, press the SET button.
8.2.6 Activating the tube collector function
(F1)
NOTE
Incorrectly setting the controller can compromise the
efficiency of the solar energy system. Therefore, only
activate the tube collector function if the construction
of the collector does not allow its temperature to be
recorded immediately and/or accurately (in some cases
there are no immersion sensors; the sensor is outside
the collector pipe).
✓ The F1 menu is open



26
Press the SET button for approx. 2 seconds until
either "oFF" or "on" flashes.
Toggle between "oFF" and "on" using the  or
buttons.
To save the setting, press the button.

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8.2.7 Activating the anti-freeze function (F2)
CAUTION
System can freeze despite the activated anti-freeze
function!
During a power outage, the anti-freeze function does
not operate.
During long-term periods of frost (due to restricted
water tank heat storage).
If collectors are mounted in locations exposed to
wind.

If frost is expected for a long-term period of time,
only operate the system with heat transfer fluid.
For further information see chapter 7.5.
NOTE
Incorrectly setting the controller can compromise the
efficiency of the solar energy system.

Only activate the anti-freeze function for solar
energy systems that are not filled with anti-freeze.
✓ The F2 menu is open



Press the SET button for approx. 2 seconds until
either "oFF" or "on" flashes.
Toggle between "oFF" and "on" using the  or 
buttons.
To save the setting, press the SET button.
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EN
8.2.8 Selecting the temperature format (F3)
✓ The F3 menu is open
Press the SET button for approx. 2 seconds until
either "°C" or "°F" flashes.
Toggle between "°C" and "°F" using the  or 
buttons.
To save the setting, press the SET button.



8.2.9 Reset
The reset function causes the controller to revert to its
factory settings, these are as follows:
P1
P2
P3
F1
F2
F3
60
8
4
off
off
°C
✓ The RESET menu is open
Press the SET button for approx. 5 seconds until
"RESET" flashes.
The controller reverts to its factory settings.

28
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9
Maintenance
The controller was conceived for years of continuous
trouble-free operation. Nevertheless, faults may occur.
Maintenance may only be performed by professional
personnel.
In most cases, however, the fault does not lie with the
controller, but rather with the peripheral components.
The following description covers the most common
problems encountered with the controller.

Only send in the controller with a precise fault
description if none of the following faults are
present.
9.1
Fault causes
WARNING
Risk of death by electrocution!

Remove the controller from the power supply before
opening the case.
Controller does not appear to function at all.
Secondary symptoms Possible cause / remedy
• The controller
display is blank.
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No power supply is present
 Have professional personnel check the fuse and the
supply cable.
29
EN
The pump, which is connected to the controller,
is not running, although its switch-on conditions
have been fulfilled.
Secondary
symptoms
• The pump symbol
is shown in the
display.
• The pump symbol
is not shown in
the display.
• Off is displayed in
alternation with
the temperature
reading
30
Possible cause / remedy
The pump connecting cable
is not connected, interrupted or the fuse in the pump
is burned out.
 If necessary, have professional personnel replace
the fuse.
Operating switch is set to
Off
 Set the operating switch
to automatic operation.
°C
Pump symbol display
(example)
°C
T1 temperature sensor
with temperature reading and
"oFF" display (example)
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EN
Short-circuit symbol and warning display appear.
Possible cause / remedy
Temperature sensor T1 or T2 or its supply cable is
short-circuited
 Have professional personnel check the supply
cables of the temperature sensors and that they
are correctly connected to the controller.
T1 temperature sensor
with short-circuit symbol and
warning sign (example)
Interruption symbol and warning signal appear.
Possible cause / remedy
Temperature sensor T1 or T2 or its supply cable is
interrupted
 Have professional personnel check the supply
cables of the temperature sensors and that they
are correctly connected to the controller.
T1 temperature sensor
with interruption symbol and
warning sign (example)
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31
EN
"SYS" and the warning symbol flash in the controller display.
Possible cause / remedy
SYS means there is a system error. This means that
despite the pump running, a temperature difference exceeding 80 K between the collector and the
storage tank was recorded.
The following causes are possible:
• The pump is faulty or not correctly connected
• The isolating valve in the solar circuit is closed
• There is air in the solar circuit
Since a standard circulation pump cannot eliminate air bubbles inside the piping system, the heat
transfer medium circuit comes to a standstill.
 Have professional personnel check the solar
energy system to prevent damage.
 Once the fault has been remedied, press any button to acknowledge the fault message.
32
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SYS display
and warning sign (example)
EN
9.2
Testing the temperature sensors
9.2.1 Safety
Only professional personnel may test the temperature
sensors.
9.2.2 Testing the resistance values
DANGER
Risk of death by electrocution!

Remove the controller from the power supply before
opening the case.
The temperature is recorded by resistance sensors.
These are Pt1000 temperature sensors. Depending on
the temperature, the resistance value also changes. A
potentially defective sensor can be checked using an
ohmmeter.
Measuring resistance values


Disconnect the corresponding temperature sensor
from the controller.
Measure the resistance value. The typical resistance
values, depending on the temperature, are listed in
the following table. Please note that small deviations are permissible.
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Temperature sensor resistance values
Temperature [°C]
-30
-20
-10
0
Resistance [Ω]
882
922
961
1000 1039 1078
Temperature [°C]
30
40
50
60
Resistance [Ω]
1117 1155 1194 1232 1271 1309
Temperature [°C]
90
Resistance [Ω]
1347 1385 1423 1461 1498 1536
Temperature [°C]
150
Resistance [Ω]
1573 1611 1648 1685
100
160
110
170
10
70
120
130
20
80
140
180
10 Dismantling and disposal
DANGER
Risk of death by electrocution!

Remove the controller from the power supply before
dismantling the controller.

To dismantle the controller, follow the assembly
instructions in the reverse order.
Dispose of the controller in accordance with the
regional regulations.

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11 Legal warranty
The manufacturer assumes the following warranty
obligations:
The manufacturer will rectify all manufacturing and
material faults that occur in the controller and affect
the correct functioning of the device during the warranty period. Natural wear and tear does not constitute
a malfunction. No warranty claims can be accepted if
a fault occurring after the purchase contract is made
with the end user can be attributed to the end user
or to third parties, especially in case of unprofessional
installation or commissioning, incorrect or negligent
handling, improper transport, excessive loading, use of
improper equipment, faulty construction work, unsuitable construction location or improper operation or
use. Warranty claims shall only be accepted if the specialist dealer is notified of the fault immediately after
it is discovered. The manufacturer must be notified of
the fault via the specialist dealer. A copy of the proof
of purchase must be enclosed.
A precise description of the fault is required for
processing.
The warranty expires 24 months after the purchase contract was made by the end user, unless the manufacturer expressly agrees to extend the period in writing.
The dealer’s warranty based on the purchase contract
with the end user is not affected by this warranty
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obligation. The manufacturer can choose to fulfill the
warranty either by repair or replacement. This does not
include the costs incurred for exchange, shipping or
re-installation. If the product can neither be repaired
or replaced, or if this does not occur within a suitable
period in spite of the specification of an extension
period in writing by the customer, the reduction in
value caused by the fault shall be replaced, or, if this is
not sufficient taking the interests of the end customer
into consideration, the contract is cancelled.
Any further claims against the manufacturer based on
this warranty obligation, in particular claims for damages due to lost profit, loss-of-use or indirect damages
are excluded, unless liability is obligatory by law.
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12 Technical data
Temperature differential controller
Operating voltage
230 V~ (± 15 %), 50 Hz
[optional 115 V (± 15 %), 60 Hz]
Own consumption
≤1W
Inputs
2
temperature recording (Pt1000)
Output
1
1 x relay switched output
switching performance max. 800 W [230 V~]
Switch-on temperature difference
4 - 20 K (factory setting 8 K)
Switch-off temperature difference
2 - 18 K (factory setting 4 K)
Display
LCD-display (48 segments)
Degree of protection
IP 20/DIN 40050
Permitted ambient temperature
0 to +45 °C
Installation
wall-mounted
Weight
250 g
Case
recyclable 3-piece plastic case
Dimensions L x W x H [mm]
137 x 134 x 38
Temperature sensors
2 x Pt1000
1.5 m silicone cable
(measuring range up to +180 °C)
Fuse
4 A MT, 250 V
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