Page 1
EN2B-0365GE51 R0710
Temperature differential controller ASC02-01WM
2 inputs, 1 output
INSTALLATION AND OPERATING INSTRUCTIONS
Page 2
2 EN2B-0365GE51 R0710
Page 3
ASC02-01WM Table of Contents
EN2B-0365GE51 R0710 3
Table of Contents
1 About this manual..........................................................................................................7
1.1 Applicability .........................................................................................................7
1.2 Users...................................................................................................................7
1.3 Description of symbols ........................................................................................8
1.3.1 The structure of the warning notices.......................................................8
1.3.2 Danger levels in warning notices ............................................................8
1.3.3 Notes ......................................................................................................8
2 Safety ..............................................................................................................................8
2.1 Proper usage.......................................................................................................8
2.2 Improper usage ...................................................................................................9
2.3 Dangers during assembly / commissioning .........................................................9
2.4 Detecting faults .................................................................................................10
2.5 Exclusion of liability ...........................................................................................10
3 Description ...................................................................................................................11
3.1 Controller in the solar circuit..............................................................................11
3.1.1 The purpose of the controller................................................................11
3.1.2 The structure of the solar circuit ...........................................................11
3.1.3 The function of the solar circuit.............................................................11
3.2 Case overview...................................................................................................12
4 Installation....................................................................................................................13
4.1 Opening / closing the case ................................................................................13
4.1.1 Opening the case .................................................................................13
4.1.2 Closing the case ...................................................................................14
4.2 Mounting ...........................................................................................................14
4.2.1 Mounting the controller .........................................................................14
Page 4
Table of Contents ASC02-01WM
4 EN2B-0365GE51 R0710
4.3 Electrical connection .........................................................................................15
4.3.1 Preparing the cable feed.......................................................................16
4.3.1.1 Feeding the cable through the rear of the case.......................16
4.3.1.2 Feeding the cable through the lower side of the case.............17
4.3.2 Connecting the cables ..........................................................................18
4.3.3 Terminal plan........................................................................................19
4.3.4 Operation of the connecting terminals ..................................................19
5 Display overview..........................................................................................................20
6 Commissioning ............................................................................................................21
6.1 Testing the pump ..............................................................................................21
7 Description of the controller functions......................................................................22
7.1 Switch-on / switch-off temperature difference ...................................................22
7.2 Maximum storage tank temperature..................................................................22
7.3 Maximum collector temperature ........................................................................23
7.4 Tube collector function (F1)...............................................................................23
7.5 Anti-freeze function (F2)....................................................................................23
8 Operation......................................................................................................................24
8.1
Reading the temperature values .......................................................................24
8.2 Setting the controller (settings menu)................................................................25
8.2.1 Using the settings menu .......................................................................25
8.2.2 Overview of menu settings ...................................................................25
8.2.3 Setting the storage tank maximum temperature (P1) ...........................26
8.2.4 Setting the switch-on temperature difference (P2)................................26
8.2.5 Setting the switch-off temperature difference (P3)................................26
8.2.6 Activating the tube collector function (F1).............................................27
8.2.7 Activating the anti-freeze function (F2) .................................................27
8.2.8 Selecting the temperature format (F3)..................................................28
8.2.9 Reset ....................................................................................................28
Page 5
ASC02-01WM Table of Contents
EN2B-0365GE51 R0710 5
9 Maintenance .................................................................................................................29
9.1 Fault causes......................................................................................................29
9.1.1 Controller does not appear to function at all .........................................29
9.1.2 Short-circuit symbol and warning display appear .................................29
9.1.3 Interruption symbol and warning signal appear ....................................30
9.1.4 The pump, which is connected to the controller, is not running,
although its switch-on conditions have been fulfilled ............................30
9.1.5 "SYS" and the warning symbol fl ash in the controller display ..............31
9.2 Testing the temperature sensors.......................................................................31
9.2.1 Safety ...................................................................................................31
9.2.2 Testing the resistance values ...............................................................31
9.2.2.1 Measuring resistance values...................................................32
10 Dismantling and disposal ...........................................................................................32
11 Technical data..............................................................................................................33
Page 6
Page 7
ASC02-01WM About this manual
EN2B-0365GE51 R0710 7
1 About this manual
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.
1.1 Applicability
This manual describes the installation, commissioning, operation,
maintenance and dismantling of the temperature differential
controller for solar thermal energy systems. When installing the
remaining components, e.g. solar collectors, pump assemblies,
storage tank, pumps and switching valves, be sure to observe the
appropriate installation instructions provided by each
manufacturer.
1.2 Users
Installation, commissioning, 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.
Page 8
Safety ASC02-01WM
8 EN2B-0365GE51 R0710
1.3 Description of symbols
1.3.1 The structure of the warning notices
SIGNALWORD
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
DANGER
Imminent threat of
danger
Death, serious
bodily injury
WARNING
Possible threat of
danger
Death, serious
bodily injury
CAUTION
Possible threat of
danger
Minor bodily injury
CAUTION
Possible threat of
danger
Property damage
1.3.3 Notes
Note on easier and safer working habits.
► Measures on easier and safer working habits.
.
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).
NOTE
Page 9
ASC02-01WM Safety
EN2B-0365GE51 R0710 9
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
2.3 Dangers during assembly / 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).
► Make sure to comply with the specified degree of protection.
► Factory labels and markings may not be altered, removed or
rendered unreadable.
► Before connecting the device, make sure that the power
supply matches the specifications on the type plate.
Page 10
Safety ASC02-01WM
10 EN2B-0365GE51 R0710
► 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 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.
Page 11
ASC02-01WM Description
EN2B-0365GE51 R0710 11
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
Storage tank
Pump
Collector
T1
T2
Temperature sensor 1
(collector sensor)
Temperature dierential controller
Solar circuit
Temperature sensor 2
(lower area of storage tank)
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 (T2) 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.
Page 12
Description ASC02-01WM
12 EN2B-0365GE51 R0710
3.2 Case overview
6
2
1
5
4
3
1 Display for controller operation and system
2 Operating button: Arrow up
3 Operating button: SET button
4 Operating button: Arrow down
5 Connections: Grid, pump, temperature sensors
6 Operating switch: The following modes of operation can be
selected:
- On: for commissioning and testing for function
- Auto: for automatic operation
- Off: to switch-off the pumps
Page 13
ASC02-01WM Installation
EN2B-0365GE51 R0710 13
4 Installation
4.1 Opening / closing the case
DANGER
Risk of death by electrocution!
► 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 will be fixed with two clips and one screw on
the lower case.
4.1.1 Opening the case
► Loosen the screw and remove the upper case in an upwards
direction.
Clips
Operating
buttons
Screw
Upper case
Lower case
Page 14
Installation ASC02-01WM
14 EN2B-0365GE51 R0710
4.1.2 Closing the case
► Place the upper case over the lower case at an angle. Insert
the clips in the pocket 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.
4.2 Mounting
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 Mounting the controller
105
1
137,2
3
2
116
134
CAUTION
Risk of injury and damage to the case when drilling!
► Do not use the case as a drilling template.
Page 15
ASC02-01WM Installation
EN2B-0365GE51 R0710 15
► Choose a suitable installation site.
► Drill the upper fastening hole.
► Screw in the screw.
► Remove the upper case.
► Hang the case in the recess c.
► Mark the position of the lower fastening holes d, e.
► Remove the case again.
► Drill the lower fastening holes.
► Hang the case up again in the recess c.
► Screw the case firmly using the lower fastening holes d
and e.
► Mount the upper case.
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.
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.
NOTE
Page 16
Installation ASC02-01WM
16 EN2B-0365GE51 R0710
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.
4.3.1.1 Feeding the cable through the rear of the case
WARNING
Risk of electrical shock and fire due to cables coming loose!
► Install an external strain relief for the cables.
7
► Remove the plastic flaps i from the rear side of the case
using an appropriate tool.
Page 17
ASC02-01WM Installation
EN2B-0365GE51 R0710 17
4.3.1.2 Feeding the cable through the lower side of the case
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.
6
► Cut the left and right plastic flaps h using an appropriate tool
and break them out of the case.
Page 18
Installation ASC02-01WM
18 EN2B-0365GE51 R0710
4.3.2 Connecting the cables
► 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
then following points:
– 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.
Page 19
ASC02-01WM Installation
EN2B-0365GE51 R0710 19
4.3.3 Terminal plan
L NN R1 T1 T2
1
23 4
5
1 PE Protective conductor
2 L1, N Grid 230 V~ (optional 115 V~)
3 R1, N Pump 230 V~ (optional 115 V~)
4 T1 Temperature sensor 1 (collector)
5 T2 Temperature sensor 2 (lower area of storage tank)
4.3.4 Operation of the connecting terminals
For any handling of the connecting terminal, only adequate tools
must be used. Any inadequate tool or mechanical over-pressure
will damage the terminal.
NOTE
Page 20
Display overview ASC02-01WM
20 EN2B-0365GE51 R0710
5 Display overview
❄
CF
1 Symbol for pump operation
2 Symbol for anti-frost function (see chapter 7.5)
3 Symbol "max" for maximum storage tank temperature and
maximum collector temperature (see chapter 7.2 and 7.3)
4 Display for temperature sensor, temperature readings and
fault symbols (see chapter 9.1), interruption,
or "SYS" = system fault (see chapter 9.1)
5 Temperature format °C / °F (see chapter 8.2.8)
Page 21
ASC02-01WM Commissioning
EN2B-0365GE51 R0710 21
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).
– "on" appears 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).
– "oFF" appears 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!
► After testing the pump, always set the operating switch to
automatic operation.
► To set the controller in automatic operation, move the
operating switch to the middle position (Auto).
– "Auto" is shown in the display for approx. 3 seconds.
CONDITION FOR
ACTION
on
off
Auto
Page 22
Description of the controller functions ASC02-01WM
22 EN2B-0365GE51 R0710
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.
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 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:
• The display flashes "max"
• The display only shows "max" when temperature sensor T2 is
also selected.
C
max
C
NOTE
Page 23
ASC02-01WM Description of the controller functions
EN2B-0365GE51 R0710 23
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"
• 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 function 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 T1 falls below
+5 °C. The heat transfer fluid is thus pumped through the collector
and tries to prevent refreezing. 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.
► It is recommended to generally use the heat carrier fluid with
antifreeze for Solar Plants.
NOTE
max
C
Page 24
Operation ASC02-01WM
24 EN2B-0365GE51 R0710
Standard antifreeze liquid for solar energy systems also contain
an additional corrosion inhibitor.
The following display appears:
• The anti-freeze symbol is displayed
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 U und
V buttons (1=T1, 2=T2).
– The selected temperature sensor and the current
measured temperature appear in the display.
Legend
1 Temperature sensor T1 display with temperature reading from
collector and active pump
2 Temperature sensor T2 display with temperature reading from
lower area of storage tank and active pump
❄
C
C
C
Page 25
ASC02-01WM Operation
EN2B-0365GE51 R0710 25
8.2 Setting the controller (settings menu)
8.2.1 Using the settings menu
► 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 V button.
► To exit the settings menu, press
V button again until the
temperature sensor and temperature reading are shown again.
8.2.2 Overview of menu settings
°C
SET
°C
°C
Reset
Temperature reading (T1 or T2)
(hold down for 2 seconds)
P1: storage tank maximum temperature
P2: switch-on temperature dierence
P3: switch-o temperature dierence
F1: tube collectorfunction
F2: anti-freeze function
F3: temperature format (°C / °F)
C
Page 26
Operation ASC02-01WM
26 EN2B-0365GE51 R0710
8.2.3 Setting the storage tank maximum temperature (P1)
DANGER
Risk of scalding due to storage tank temperature of over
60 °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 V
or U buttons.
► To save the value, press 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
V or
U buttons.
► To save the value, press the SET button.
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
V or
U buttons.
► To save the value, press the SET button.
CONDITION FOR
ACTION
C
CONDITION FOR
ACTION
CONDITION FOR
ACTION
Page 27
ASC02-01WM Operation
EN2B-0365GE51 R0710 27
8.2.6 Activating the tube collector function (F1)
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
► Press the SET button for approx. 2 seconds until either "oFF"
or "on" flashes.
► Toggle between "oFF" and "on" using the V or U buttons.
► To save the setting, press the SET button.
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.
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.
NOTE
CONDITION FOR
ACTION
NOTE
Page 28
Operation ASC02-01WM
28 EN2B-0365GE51 R0710
• 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 V or U buttons.
► To save the setting, press the SET button.
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 V or U 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.
CONDITION FOR
ACTION
CONDITION FOR
ACTION
CONDITION FOR
ACTION
Page 29
ASC02-01WM Maintenance
EN2B-0365GE51 R0710 29
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.
9.1.1 Controller does not appear to function at all
Secondary symptoms Possible cause / remedy
• The controller display is
blank
No power supply is present
f Have professional personnel
check the fuse and the
supply cable.
9.1.2 Short-circuit symbol and warning display appear
Symbol Possible cause Remedy
T1 temperature sensor with
short-circuit symbol and
warning sign (example)
Temperature sensor T1 or T2
or its supply cable is shortcircuited
f Have professional personnel
check the supply cables of
the temperature sensors and
that they are correctly
connected to the controller.
Page 30
Maintenance ASC02-01WM
30 EN2B-0365GE51 R0710
9.1.3 Interruption symbol and warning signal appear
Symbol Possible cause Remedy
T1 temperature sensor with
interruption symbol and
warning sign (example)
Temperature sensor T1 or T2
or its supply cable is
interrupted
f Have professional personnel
check the supply cables of
the temperature sensors and
that they are correctly
connected to the controller.
9.1.4 The pump, which is connected to the controller, is not
running, although its switch-on conditions have been fulfilled
Symbol Secondary symptoms Possible cause / remedy
C
Pump symbol display
(example)
• The pump symbol is shown
in the display
The pump connecting cable is
not connected, inter-rupted or
the fuse in the controller is
burned out
f If necessary, have profes-
sional personnel replace the
fuse
C
T1 temperature sensor with
temperature reading and
"off " display (example)
• The pump symbol is not
shown in the display
• "Off" is displayed in
alternation with the
temperature reading
Operating switch is set to Off
► Set the operating switch to
automatic operation
Page 31
ASC02-01WM Maintenance
EN2B-0365GE51 R0710 31
9.1.5 "SYS" and the warning symbol fl ash in the controller display
Symbol Mögliche Ursache Abhilfe
SYS display and warning
sign (example)
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.
f Have professional
personnel check the
solar energy system
to prevent damage.
f Once the fault has
been remedied,
press any button to
acknowledge the
fault message.
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.
Page 32
Dismantling and disposal ASC02-01WM
32 EN2B-0365GE51 R0710
9.2.2.1 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.
Temperature sensor resistance values
Temperature [°C] –30 –20 –10 0 10 20
Resistance [Ω]
882 922 961 1000 1039 1078
Temperature [°C] 30 40 50 60 70 80
Resistance [Ω]
1117 1155 1194 1232 1271 1309
Temperature [°C] 90 100 110 120 130 140
Resistance [Ω]
1347 1385 1423 1461 1498 1536
Temperature [°C] 150 160 170 180
Resistance [Ω]
1573 1611 1648 1685
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.
Page 33
ASC02-01WM Technical data
EN2B-0365GE51 R0710 33
11 Technical data
Temperature differential controller
Operating voltage 230 V~ (± 15 %), 50 Hz
[optional 115 V (± 15 %), 60 Hz]
Power consumption ≤ 1 W
Inputs 2
temperature (Pt1000)
Outputs 1
1 x relay 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)
Protection class IP 20 / DIN 40050
Ambient temperature 0 bis +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 Pt1000
(measuring range up to
+230 °C)
Fuse 4 A MT, 250 V or
T 4 A H 250 V
(Littlefuse: 215004)
Page 34
Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies
Sàrl, Rolle, Z.A. La Pièce 16, Switzerland by its Authorized Representative:
Automation and Control Solutions
Honeywell GmbH
Böblinger Straße 17
71101 Schönaich / Germany
Phone (49) 7031 637 01
Fax (49) 7031 637 493
http://ecc.emea.honeywell.com
Printed in Germany
All rights reserved. Subject to change without notice.
EN2B-0365GE51 R0710
Loading...