Page 1
Installation, Wiring and Operating Instructions
REGULUS SRS2 TE Solar Controller
EN
v. 1.3
Page 2
CONTENTS
A.1 EC Declaration of Conformity 4
A.2 General information 4
A.3 Explanation of symbols 4
A.4 Changes to the unit 5
B.1 Specifi cation 6
B.2 Temperature resistance table for
Pt1000 sensors 6
B.3 Description 7
B.4 Scope of supply 7
B.5 Disposal 7
B.6 Hydraulic variants 8
C.1 Wall installation 9
C.2 Electrical wiring 10
C.3 Installing the temperature sensors 11
D.1 Terminal block wiring 12
D.2 Example of el. heating element wiring 13
E.1 Display and input 14
E.2 Commissioning help 15
E.3 Free commissioning 15
E.4 Menu sequence and menu structure 16
1. - Measurements 17
2. - Statistics 18
2.1. - Operating hours 18
2.2. - Heat quantity 18
2.3. - Graphic overview 18
2.4. - Error log 18
2.5. - Reset / Clear 18
3. - Operating modes 19
3.1. - Auto 19
3.2. - Manual 19
3.3. - OFF 19
5.2. - System protection 25
5.3. - Collector protection 25
5.4. - Recooling 25
5.5. - Frost protection 26
5.6. - Seizing protection 26
5.7. - Collector alarm 26
6. - Special functions 27
6.1. - Program selections 27
6.2. - Pump settings V1 27
6.2.1. - Type of pump 27
6.2.2. - Pump 27
6.2.3. - Output Signal 28
6.2.4. - PWM Off / 0-10V Off 28
6.2.5. - PWM On / 0-10V On 28
6.2.6. - PWM Max/ 0-10V Max 28
6.2.7. - Show signal 28
6.3. - Speed control R1 29
6.3.1. - Modes R1 29
6.3.2. - Purging time 29
6.3.3. - Sweep time 29
6.3.4. - Max. speed 30
6.3.5. - Min. speed 30
6.3.6. - Setpoint 30
6.3.7. - Temperature difference 30
6.7. - Heat quantity 30
6.7.1. - Heat metering 30
6.7.5. - Antifreeze type 30
6.7.6. - Glycol percentage 31
6.7. 7. - Fl ow ra t e 31
6.7.9. - ΔT Offset 31
6.8. - Sensor calibration 31
6.9. - Commissioning 31
6.10. - Factory settings 31
6.11. - Start aid function 32
6.12. - Time and date 32
6.13. - Daylight saving time 32
6.14. - Sleep mode 32
6.15. - Temperature unit 32
4. - Settings 20
4.1. - Tmin S(X) 20
4.4. - ΔT Solar S(X)
4.5. - Tmax S(X) 21
4.14. - Auxiliary heat source 22
4.14.1. - TH Set 22
4.14.2. - Hysteresis 22
4.14.3. - Aux. heat source sensor 1 22
4.14.4. - Aux. heat source sensor 2 22
4.14.5. - T eco 22
4.14.6. - Energy saving mode 22
4.14.7. - Periods 23
4.15. - Recirculation 23
4.15.1. - Min. set temperature 23
4.15.2. - Hysteresis 23
4.15.7. - Recirculation time programs 23
5. - Protective functions 24
5.1. - Anti Legionella 24
20
7. - Menu lock 33
8. - Service values 34
9. - Language 35
Z.1 Malfunctions with error messages 36
Z.2 Replacing the fuse 37
Z.3 Maintenance 37
Useful hints and tricks 38
Page 3
This Instruction Manual applies to the following hardware version:
SRS2 TE
2 output mechanical relays 460 W
1 output mechanical relays 3.5 kW
3 inputs for Pt1000 temperature sensors
3
Page 4
Safety Instructions
A.1 EC Declaration of Conformity
The manufacturer declares that the SRS2 TE Solar Controller is marked with the CE
mark and conforms to the following relevant safety regulations:
- Directive 2014/35/EU - EU low voltage direc
- Directive 2014/30/EU - EU electromagnetic compatibility directive
A.2 General information
These installation and operating instructions contain basic instructions and important
information regarding safety, installation, commissioning, maintenance and the optimal
use of the unit. Therefore these instructions must be read completely and understood
by the installation technician/specialist and by the system user before installing,
commissioning and operating the unit. The installation shall be done in compliance
with valid standards and rules. The controller does not under any circumstances
replace any safety devices (e.g. safety valve, air vent valve etc.) to be installed into
a solar circuit! Installation of the unit may only be carried out by a specialist who is
trained on the required level.
For the user: Make sure that the specialist gives you detailed information on the
function and operation of the controller. Always keep these instructions in the vicinity
of the controller. Any changes to the controller or tampering with may pose a risk to
safe operation of the appliance and to the complete solar thermal system..
tive
- please read carefully!
A.3 Explanation of symbols
Failure to observe these instructions can result in danger to life from
Danger
Danger
Warning
Caution
4
electric voltage.
Failure to observe these instructions can result in serious damage to
health such as scalding, or even life-threatening injuries.
Failure to observe these instructions can result in destruction of the unit
or the system, or damage to the environment.
Information especially important for the function and optimal use of the
unit and the system.
Page 5
Safety Instructions
A.4 Changes to the unit
• Changes, additions to or conversion of the unit are not permitted without a written
permission from the Manufacturer.
• It is forbidden to install any additional components into the controller that has not
been tested together with the controller.
• The controller shall not be used after an accident when its functions may have been
affected – e.g. after a fire. The controller shall be switched off immediately.
• Use original spare parts only.
• Marking of the Manufacturer and Distributor shall not be altered or removed.
• All adjustments shall be done in compliance with this Guide.
5
Page 6
Description
B.1 Specification
Electric specification::
Voltage 100 - 240 VAC +/- 10%
Mains frequency 50 - 60 Hz
Power consumption 0,5W - 2,5 W
Internal fuse T2 A / 250 V slow blow
IP rating IP40
El. protection class II
Overvoltage category II
Pollution degree II
SRS2 TE
Mechanical relay, 460 VA (AC1), 460 W (AC3) 2 (R1, R2)
Mechanical relay, 3500 VA (AC2), 3500 W (AC3) 1(R3)
Pt1000 sensors, from -40 °C to +300 °C 3
Permissible cable length of sensors and accessories:
Collector sensor <30 m
other Pt1000 sensors <10 m
Mechanical relay <10 m
Clock backup period 24 h
Permissible ambient conditions:
Ambient temperature:
for controller operation 0°C...40 °C
for transport/storage 0°C...60 °C
Air humidity:
for controller operation max. 85% rel. humidity at 25 °C
for transport/storage no moisture condensation permitted
Other specifications and dimensions:
Housing design 2-part, ABS plastic
Installation methods wall installation, optionally panel installation
Overall dimensions 163 mm x 110 mm x 52 mm
Installation aperture dimensions 157 mm x 106 mm x 31 mm
Display fully graphic display, 128 x 64
LED multicolour
Operation 4 entry keys
Tempe ratu re senso rs:
B.2 Temperature resistance table for Pt1000 sensors:
°C 0 102030405060708090100
Ω 1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385
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Description
B.3 Description
SRS2 TE Controller is designed for automatic control of solar thermal systems. The
SRS2 TE model is intended to control solar thermal systems with one solar array and
one solar consumer. The solar consumer can be a hot water storage tank, a heat exchanger for a swimming pool, and a thermal store for heating. All hydraulic variants are
described in Chapter 2.
- both graphics and texts on a backlit display
- simple viewing of the current measurement values
- analysis and monitoring of the system also by means of statistical graphics
- extensive setting menus with explanations
- menu lock can be activated to prevent unintentional setting changes
- usual preset parameters in factory setting
B.4 Scope of supply
- SRS2 TE Controller
- 3 screws 3.5 × 35 mm and 3 dowels 6 mm diam. for wall installation
- 12 strain relief clips with 24 screws
- replacement fuse T2A/250V
- 3 Pt1000 temperature sensors
B.5 Disposal
IMPORTANT INFORMATION ON DISPOSAL IN COMPLIANCE WITH THE EUROPEAN
DIRECTIVE 2002/96/ES
European Directive 2002/96/EC requires that the equipment bearing this symbol on the product and/or its
packaging must not be disposed of with unsorted municipal waste. The symbol indicates that this product should
be disposed of separately from regular household waste
streams. It is your responsibility to dispose of this and
other electric and electronic equipment via designated
collection facilities appointed by the government or local
authorities. Correct disposal and recycling will help prevent potential negative consequences to the environment
and human health. For more detailed information about
the disposal of your old equipment, please contact your
local authorities, waste disposal service, or the shop where you purchased the product.
WEEE registration number: 02771/07-ECZ
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Page 8
Description
B.6 Hydraulic variants
1. Solar with hot wa t e r stora g e tank
2. Sol a r with ho t w at er stor a ge tank a nd el. he ating el ement
3. Sol a r with ho t w a t e r s t orage tank an d gas boi ler
4. Solar with ho t w ater storage tank and heat pump
5. Sol a r with ho t w ater storage t a n k w. re circ u latio n
6. Sol a r with ho t w ater storage t a n k w. re circ u latio n a nd el. hea ting el.
7. Solar with h o t wa t er stor a ge tank w. re circ u l a tion and gas bo iler
8. Sol a r with ho t w a t e r s torag e tank w. recircu latio n a nd heat p u m p
1. Solar with hot water storage tank 2. Solar with hot water storage tank
and el. heating element
4. Solar with hot water storage tank
and heat pump
7. Solar with hot water storage tank
w. recirculation and gas boiler
5. Solar with hot water storage tank
w. recirculation
8. Solar with hot water storage tank
w. recirculation and heat pump
3. Solar with hot water storage tank
and gas boiler
6. Solar with hot water storage tank
w. recirculation and el. heating el.
For hydraulic variants 6, 7 or 8, an extra Pt1000 temperature sensor is needed.
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C.1 Wall installation
Install the controller in dry areas only.
Warning
Installation instructions::
Installation
C.1.1
C.1.2
1. Unscrew cover screw completely.
2. Carefully pull the upper part of the housing from the lower part.
3. Set the upper part of the housing aside,
being sure not to touch the electronics
when doing so.
4. Hold the lower part of the housing up
to the selected position and mark the 3
mounting holes. Make sure that the wall
surface is as even as possible so that the
housing does not become distorted when
it is screwed on.
5. Mark the position on the wall with a
pencil. Using a drill and size 6 bit, drill 3
holes at the points marked on the wall and
push in the plugs.
Fig. C.1.2.
6. Insert the upper screw and screw it in
slightly.
7. Fit the upper part of the housing and
insert the other two screws.
8. Align the housing and tighten the three
screws.
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Page 10
C.2 Electrical wiring
Before working on the unit, switch off the power supply and secure
it against being switched on again! Check for the absence of power!
Electric wiring may only be done by a specialist in compliance with valid
Danger
Warning
Warning
rules. Do not use the controller if its case shows visible damage.
Low-voltage cables such as temperature sensor cables must be routed
separately from mains voltage cables. Feed temperature sensor cables
only into the left-hand side of the unit, and mains voltage and relay
cables only into the right-hand side.
The controller is not equipped with a mains switch. For this purpose
please use e.g. a circuit breaker.
Installation
Warning
Caution
The cables being connected to the unit must not be stripped by more
than 55 mm, and the cable jacket must reach into the housing just to the
other side of the strain relief.
Controller and VFS flowmeter have to have the same ground potential.
The VFS flowmeter uses a functional earth connector (PELV). For this
reason, the PE-connector of the controller has to be connected to the
pipe system near the flowmeter.
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Installation
C.2.1
C 2. 1 Wiring instructions:
1.
Select the necessary hydraulic variant
(B.6)
.
2. Open the controller as described in C.1
3. Strip the cable by 55 mm max., insert
and fit the cable strain relief. Strip the last
8-9 mm of all the wires (Fig. C.2.1)
4. Open the terminals using a flat
screwdriver (Fig. C.2.1.) and wire the leads
following the diagram.
5. Refit the upper housing part and fasten
with screw.
6. Switch on mains voltage and place controller in operation.
C.3 Installing the temperature sensors
The controller operates with Pt1000 temperature sensors.
Max. sensor lead length for S1 sensor is 30 m and its cross section at least
2
. Max. sensor lead length for S2 and S3 is 10 m and its cross section
2
. Make sure there is no contact resistance in the wiring!
Caution
Warning
0.75 mm
at least 0.75 mm
Select the proper location for the sensor where it feels the right temperature.
Use only immersion sensors. Pipe-mounted sensors only in exceptional
cases.
Make sure that the terminals of extension cables and sensors are properly
tightened. Use only immersion or pipe-mounted sensors.
The temperature sensor cables must be routed separately from mains voltage
cables.
Caution
The VFS flowmeter shall be connected via a terminal. It is highly
recommended to connect the VFS flowmeter to the solar return – this will
prevent damage by a too high temperature. Check the flow direction.
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D.1 - Terminal block wiring
CAN CAN
Installation
S3 S2 S2 S1 S1 R2 R1LNNN
S4 S4
Extra low voltage
max. 12 V
Warning
Extra low voltage max. 12 V
Terminal: connection for:
S1 sensor 1
S2 sensor 2
S3 sensor 3
S4 sensor 4
S3V1
*
R3R3
Mains voltage
230 V
Danger
Mains voltage 230 V 50 Hz
Terminal: connection for:
N neutral N
R1 relay 1
N Mains neutral N
L Mains phase L
N neutral N
V1 output 0-10V / PWM
for high-efficiency pumps
*Sensor No. 4 is not included in supply!
12
R2 relay 2<
R3l relay 3l
R3 relay 3
PE protective conductor
(green-yellow)
Page 13
Installation
D.2 Example of el. heating element wiring
sensor 4 mains voltage
230 V
Controller
SRS2 TE
el. heating element
L - mains phase
N - mains neutral
PE - protective
conductor
13
Page 14
E.1 Display and input
Operation
The display (1) shows graphic and text
info on the hydraulic variant, set and
measured values and other text info.
(1)
(2)
(3)
(4)
Examples of display symbols:
pump (rotates in operation)
valve (direction of flow black)
collector
hot water storage tank
swimming pool
temperature sensor
heat exchanger
LED lamp (2):
lights up green - if a relay is closed and
the controller works right
lights up red - if the controller is set to
automatic operation and all relays are
open
flashes slowly red - if manual operation
mode is set
flashes quickly red - if an error occurred
Entries are made using four keys (3+4),
which are assigned to different functions
depending on the situation.
The ”esc” key (3) is used to cancel an
entry or to exit a menu.
If applicable there will be a request for
confirmation as to whether the changes
which have been made should be saved.
The function of each of the other three
keys (4) is shown in the display line
directly above the keys; the right-hand key
generally has a selection and confirmation
function.
14
load pause
warning/error message
new information available
logging is active
Examples of key functions:
+/- = increase/decrease values
▼/▲ = scroll menu down/up
YES/NO = approve/reject
Info = additional information
Back = to previous screen
ok = confirm selection
Confirm = confirm setting
Page 15
Operation
E.2 Commissioning help
The fi rst time the controller is turned on,
language and clock need to be set.
After that a query appears as to whether
you want to parameterize the controller
using the Setup Wizard or not. The setup
wizard can also be terminated or called up
again at any time in the special functions
menu. The setup wizard guides you through the necessary basic settings in the
correct order, and provides brief descripti-
ons of each parameter in the display.
Pressing the “esc” key takes you back to the previous value so you can look at the
selected setting again or adjust it if desired. Pressing the “esc“ more than once takes
you back step by step to the selection mode, thus cancelling the setup wizard. Finally,
menu 3.2 under operating mode “Manual” should be used to test the switch outputs
with the consumers connected, and to check the sensor values for plausibility. Then
switch on automatic mode.
E.3 Free commissioning
If you decide not to use the commissioning help, you should make the necessary
settings in the following sequence:
- Menu 9. Language (page 35)
- Menu 6.12 Time and date (page 32)
- Menu 6.1 Program selection (page 27)
- Menu 4. Settings, all values (page 20)
- Menu 5. Protective functions if modifications are necessary (page 24)
- Menu 6. Special functions if additional changes are necessary (page 27)
Finally, menu 3.2 under operating mode “Manual“ should be used to test the switch
outputs with the consumers connected, and to check the sensor values for plausibility.
Then switch on automatic mode.
Observe the explanations for the individual parameters on the following
pages, and check whether further settings are necessary for your
Caution
application.
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E.4 Menu structure
Operation
The graphics or overview mode appears
when no key has been pressed for
2 minutes, or when the main menu is
exited by pressing “esc“.
Pressing any key (4) in graphics or
overview mode takes you directly to the
main menu. The following menu items are
then available for selection there:
1. Measurements
2. Statistics
3. Operating mode
4. Settings
5. Protections
6. Special functions
7. M e n u lock
8. Service Data
Current temperature values with
explanations
Function control of the system with
operating hours etc.
Automatic mode, manual mode or switch
unit off
Set parameters needed for normal
operation
Solar and frost protection, recooling...
Commissioning help, program selection,
sensor calibration, clock etc.
Menu lock against unintentional setting
changes
Diagnosis in the event of an error
16
9. Language
Language selection
Page 17
1. - Measurements
If “--” appears on the display instead of the measurement value,
then there may be a defective temperature sensor or its wiring. If the
cables are too long or the sensors are not placed optimally, the result
may be small deviations in the measurement values. In this case the
Caution
display values can be compensated for using the function of sensor
compensation - see Chapter 6.8.
Which sensors are displayed will depend on the program selected,
sensors connected and settings.
Measurement values
Menu “1. Measurements” serves to display the currently measured temperatures.
What measurement values are displayed
depends on the selected program and the
specific controller model.
The menu is closed by pressing “esc” or
selecting “Exit measurements”.
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2. - Statistics
For analysis of the system data it is essential that time is set accurately
on the controller. Please note that the clock does not continue to run if
the mains voltage is interrupted, and must therefore be reset. Incorrect
Caution
time set in the controller may result in data being deleted, recorded
incorrectly or overwritten.
Statistics
Menu “2. Statistics” is used for function
control and long-term monitoring of the
system.
The menu is closed by pressing “esc” or
selecting “Exit statistics”.
2.1. - Operating hours
Display of operating hours of the solar pump connected to the controller; various time
spans are available (last day, week, month, year).
2.2. - Heat quantity
Display of the approximate heat output of the solar thermal system.
2.3. - Graphic overview
This function provides a clearly-organized display of operating hours, average ΔT and
heat output as a bar graph. Various time ranges are available. The two left-hand keys
can be used to page through the data.
2.4. - Error log
Display of the last 20 events occurring in the system with indication of date and time.
2.5. - Reset / Clear
Resetting and deleting the individual analyses. The function “All statistics” clears all
analyses but not the error messages.
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Operating modes
3. - Operating modes
In menu “3. Operating modes” the controller can either be switched to automatic
mode, turned off, or placed in a manual
operating mode.
The menu is closed by pressing “esc” or
selecting “Exit operating mode”.
3.1. - Automatic
Automatic mode is the normal operating mode of the controller.
Only automatic mode provides proper controller function taking into account the
current temperatures and the parameters that have been set!
3.2. - Manual
The relay and thus the connected pump, valve or heating rod are switched on and
off manually by pressing a key, with no regard to the current temperatures and the
parameters which have been set. The measured temperatures are also shown.
The manual mode is intended to be used by a technician when
commissioning or checking the system. Activating manual mode in
Danger
3.3. - Off
Warning
current operation can lead to system damage or overheating of water in
the hot water storage tank!
When the operating mode “Off” is activated, all controller functions are
switched off. This can lead, for example, to overheating of the solar
collector or other system components. The measured temperatures are
displayed even when the controller is Off.
Never select other mode than automatic without a reason. Long-term operation in
manual mode may lead to collector or storage tank overheating and limiting the lifetime
of solar fluid and other solar thermal components!
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Settings
4. - Settings
The system parameters are set in menu “4.
Settings”.
The menu is closed by pressing “esc” or
selecting “Exit settings”.
4.1. - Tmin S(X)
Sensor S(X) switch-on temperature
If the temperature at sensor S(X) exceeds the value of TminS(X) and the other conditions are also met, then the controller switches on the associated pump and/or valve.
If the temperature at the sensor S (X) drops below the value of TminS(X) by 5 °C, then
the pump and/or the valve are switched off again.
Setting range: 0-99 °C /Default setting: 20 °C
4.4. - ΔT Solar S(X)
3.4. - Tmax S2
Switch-on/switch-off temperature difference for sensor (X)
If this temperature difference between the reference sensors is exceeded and the
other conditions are also met, then the controller switches on the applicable relay.
When the temperature drops by ΔT Off, then the relay is switched off again.
Setting range: ΔT: 4 - 50 °C / ΔT off: 2 - 49 °C / Default setting: depends on the hydrau-
lic variant
Setting the temperature difference too small may lead to a situation
when the heat source will not be able to heat up the solar consumer to
the value when the pump is switched off (ΔT of source – ΔT off). Then
the pump will run continuously. Setting the temperature difference too
Caution
big may lead to switching the circulation pump on and off permanently.
Please refer to special rules described in Chapter 6.3 for switching
pumps with controlled speed.
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4.4. - ∆T R2
4.5. - Tmax S(X)
Sensor S(X) switch-off temperature
If the temperature at sensor S(X) exceeds the value of TmaxS(X) and the other conditions are also met, then the controller switches off the associated pump and/or valve. If
the temperature at the sensor S(X) drops below this value, then the pump and/or the
valve are switched on again.
Setting range: 0-99 °C / Default setting: 60 °C
Temperature values which are set high will allow higher solar heat accumulation but it shall be checked that all system components are resis-
Danger
tant to high temperatures and scalding protection is provided. Regulus
solar thermal systems are safe for heating water up to 95 °C.
Settings
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Settings
4.14. - Auxiliary heating
Auxiliary heat function based on time or temperature.
4.14.1. - TH Set
Target temperature at thermostat sensor 1. Below this temperature, auxiliary heating is
switched on, till TH set + hysteresis is reached.
Setting range: 0°C to 100 °C / Default setting: 50°C
Temperature values which are set too high can lead to scalding or dam-
Danger
4.14.2. - Hysteresis
Hysteresis of setpoint temperature. Setting range: 1 (highest priority) to 3 (lowest priority).
Setting range: -20 K to +20 K / Default setting: 10 K
age to the system. Scalding protection must be provided by the customer!
4.14.3. - Aux. heat source sensor 1
TH set is measured with thermostat sensor 1 and compared to T set. When thermostat
sensor 2 is also connected, the relay switches on when T set is undershot at
thermostat sensor 1, and switches off when TH set + hysteresis at thermostat sensor 2
is exceeded.
4.14.4. - Aux. heat source sensor 2
Optional switch off sensor
When TH set + hysteresis is exceeded at the optional thermostat sensor 2, the relay is
switched off.
4.14.5. - T eco
TH set in Energy saving mode.
Setting range: 0-100 °C / Default setting: 40 °C
4.14.6. - Energy saving mode
When Energy saving mode is active: During solar charge T eco is used instead of
TH set. When the temperature drops below T eco at thermostat sensor 1, the relay is
switched on and heats up to T eco + hysteresis.
Setting range: ON/OFF / Default setting: OFF
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Settings
4.14.7. - Periods
Set the desired periods of time when the thermostat should be active. 2 periods can
be set per day, settings can also be copied to other days. Outside the set times the
auxiliary heat source is switched off.
Setting range: from 00:00 to 23:59 / Default setting: 06:00 to 22:00
4.15. - Recirculation
Time- and temperature controlled operation of hot water recirculation pump.
4.15.1. - Min. set temperature
If temperature at the hot water sensor drops below this temperature during the period
when HW recirculation is active (see 4.15.7), the recirculation pump is switched on.
Setting range: 10 °C to 90 °C / Default setting: 51°C
4.15.2. - Hysteresis
Hysteresis of the preset temperature.
Setting range: 1 K to +20 K / Default setting: 5 K
4.15.7. - Recirculation time programs
Set the desired periods of time when recirculation should be active. 2 periods can
be set per day, settings can also be copied to other days. Outside the set times
recirculation is switched off.
Setting range: from 00:00 to 23:59 / Default setting: 06:00 to 22:00
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Protective functions
5. - Protective functions
Menu “5. Protections” can be used to activate and set various protective functions.
This does not under any
circumstances replace the safety
Warning
The menu is closed by pressing “esc” or
selecting “Exit protections“.
5.1. - Anti Legionella
This function is used to heat up the system during selected period (Min. time
Legionella) that will start following the set time schedule and last until the temperature
AL Tset is reached . This temperature must be reached and kept at the AL sensor for
the time set as AL residence time. If the AL function is ON, then the parameter Tmax
changes automatically to AL Tset +10 °C to prevent system switch off due to exceeding
a high temperature limit.
Anti Legionella heat up is considered successful if the temperature at Legionella
Sensor 2 reaches at least a temperature of “AL Tset” -5°C. The time of this heat up is
then displayed as Last AL heat. If the temperature of “AL Tset” -5°C is not reached
within 2 hours, the attempt will be cancelled and started again the following day. At the
same time, an error message will appear. A message saying “Anti-Legionella heat up
can be started manually” will be also displayed.
facilities to be provided by the
customer!
AL resid. time - This determines the time span for which the AL T set temperature
must be detected for a successful AL heat up.
Last AL heat Displays the date and time of the last successful AL heat up.
AL-times During this periods the AL heat up is attempted.
Setting range: Anti Legionella: ON, OFF / Default setting: ON
Setting range: AL Tset 60 °C to 99 °C /
Setting range: AL resid. time 1 min. to 120 min. /
Default setting: 70 °C
Default setting: 15 min
Whenever heating-up has been carried out with the anti-Legionella
function switched on, an information message with the date appears on
Caution
the display.
During the anti-Legionella function the storage tank is heated up to a
very high temperature which can lead to scalding and damage to the
Danger
system.
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Protective functions
Protective functions
This anti-Legionella function does not provide complete protection against
Legionella, because the controller is dependent on sufficient energy being
fed in, and it is not possible to monitor the temperatures in the entire
Warning
5.2. - System protection
Protection of the highest priority
Protection of the solar circuit protects its components from overheating. If “SP T on”
is exceeded at the collector for over 1 minute, the pump is switched off. The collector
is left at high temperature. The pump is activated again when the temperature drops
below “SP T off”.
Setting range: Solar circuit protection: ON, OFF / Default setting: ON
Setting range: SP T on 60 °C to 150 °C / Default setting: 120 °C
Setting range: SP T off 50 °C to SP T on – 5°C / Default setting: 115 °C
range of the storage tanks and the connected piping system. To provide
complete protection against Legionella bacteria, it must be ensured that
the temperature is raised to the necessary temperature, and at the same
time there must be water circulation in the storage tank and piping system
by means of other additional energy sources and external control units.
Collectors do not get cooled and stay heated. This may result in limited
lifetime of the solar fl uid. If you use this function, please check your solar
Warning
5.3. - Collector protection
If “CP T on” is exceeded at the collector sensor, the pump is switched on in order
to cool the collector down. The pump turns off when the collector temperature drops
below “CP T off” or the temperature “Storage (X) maximum” is exceeded in the
storage tank or swimming pool. In systems with 2 storage tanks only the lower-priority
tank or pool is used for collector cooling.
Setting range: Collector protection: ON, OFF / Default setting: OFF
Setting range: CP T on 60 °C to 150 °C / Default setting: 110°C
Setting range: CP T off 50°C to to CP T on – 5 °C / Default setting: 100°C
Setting range: Storage (X) maximum 30 °C to 140 °C / Default setting: 90 °C
* (x) is the storage tank number
Danger
fl uid regularly!
When this function is active, a storage tank or swimming pool may get
heated up to “Storage (X) maximum”, over Tmax S2 (see 4.2. - Tmax S)
which might cause damage to the system.
5.4. - Recooling
At the end of a sunny day the temperature in a storage tank may easily reach high values. In
order to prevent further temperature increase the next day, excess energy can be released
into the air via collectors under cloudy conditions or after sunset.
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Protective functions
If the temperature in the storage tank exceeds the value “Recooling Tset” and the
collector is at least by 20 °C cooler than the storage tank, the solar pump starts. The
storage tank is then cooled down until the “Recooling Tset” is reached.
Setting range: Recooling: ON, OFF / Default setting: OFF
Setting range: Recooling Tset: 0 °C to 99 °C / Default setting: 70 °C
This function enables to release excess heat from the storage tank
considerately and without solar fluid overheating, via piping and
Caution
5.5. - Frost protection
A two-stage frost protection function is available. In stage 1 the controller switches the
pump on for 1 minute every hour if the collector temperature drops below the set value
“Frost level 1”. If the collector temperature drops further to the set value “Frost level
2”, the controller switches the pump on continuously. If the collector temperature then
exceeds the value “Frost level 2” by 2 °C, then the pump switches off again.
Setting range: Frost protection: ON, OFF / Default setting: OFF
Setting range: Frost level 1 -25 to 10 °C or OFF / Default setting: 7 °C
Setting range: Frost level 2 -25 to 8 °C or OFF / Default setting: 5 °C
collectors into the ambient air. It is recommended to keep activated.
This function causes energy loss via the collector!
As Regulus solar thermal systems are filled with antifreeze fluid, the
Caution
antifreeze protection shall remain off.
5.6. - Seizing protection
Protection against pump seizing by regular short running of a pump or a valve. Seizing
may occur after longer inactivity of valves or pumps. If the seizing protection is activated,
the controller switches the relay in question and the connected appliance every day at
12:00 or weekly on Sundays at 12:00 (setting “weekly”) for 5 seconds in order to prevent
the pump and/or the valve from sticking after an extended stationary period.
Setting range: ABS R1: daily, weekly OFF / Default setting: daily
Setting range: ABS R2: daily, weekly OFF / Default setting: daily
5.7. - Collector alarm
If this temperature is exceeded at the collector sensor when the solar pump is on, a
warning is triggered. A red LED starts flashing and a warning message is shown on
the display.
Setting range: Collector alarm OFF, ON / Default setting: OFF
Setting range: Collector Tmax 60 °C to 299 °C /
Setting range: Delay: 1 - 60 minut /
Default setting: 1 min.
Default setting: 115 °C
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6. - Special functions
Menu numbering depends on the hydraulic variant selected.
Caution
Special functions
Menu “6. Special functions” is used to set
basic items and expanded functions.
Time and Date is the only
function to be set by the user.
Warning
The menu is closed by pressing “esc” or
selecting “Exit special functions”.
Other functions may be set by a
specialist only.
6.1. - Program selection
The suitable hydraulic variant for the specific application is selected and set here (see
B.5 Hydraulic variants). The associated diagram is displayed on pressing “info”.
Setting range: 8 hydraulic variants / Default setting: Solar (selection 6.1.1)
Normally the program selection is made only once during initial
commissioning by the specialist. Incorrect program selection can lead
to unpredictable errors. If the program is changed, the settings revert to
Caution
factory settings.
For hydraulic variants 6, 7 and 8, one extra Pt1000 temperature
sensor is needed.
6.2. - Pump settings V1
This menu contains the settings for high-efficiency pumps with either 0-10V or PWM
control.
Solar pumps perform at their highest power when the signal is at its
maximum. Heating pumps on the other hand are set to the highest
Caution
power when the control signal is at the lowest.
6.2.1. - Type of signal
Standard: Speed control for standard pumps.
0-10V: Speed control of a high efficiency pump by 0-10V signal.
PWM: Speed control of a high efficiency pump by PWM signal.
6.2.2. - Pump profile
In this menu, preconfigured profiles for various pumps can be selected.
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Special functions
6.2.3. - Output Signal
This menu determines the type of pump used: Solar pumps perform at their highest
power when the signal is also at its maximum, heating pump on the other hand are set
to highest power when the control signal is at its minimum.
Solar = Normal, Heating pumps = Inverted.
Setting range: Normal, Inverted / Default setting: Normal
6.2.4. - PWM Off / 0-10V Off
This signal is put out when the pump is switched off (pumps that can detect cable
break need a minimum voltage).
Setting range: Solar: 0 to 50 % / Default setting: 0 %
HP: 50 to 100 %/ Default setting: 100 %
6.2.5. - PWM Zap / 0-10V Zap
This signal is needed to turn the pump on at minimum speed.
Setting range: Solar: 0 to 50 % / Default setting: 10 %
HP: 50 to 100 % / Default setting: 90 %
6.2.6. - PWM Max / 0-10V Max
This determines the output voltage for the maximum performace of the pump that is
used e.g. during purging or manual operation.
Setting range: Solar: 50 to 100 % / Default setting: 100 %
HP: 0 to 50 % / Default setting: 0 %
6.2.7. - Show signal
Displays the set signal in text and a graphical diagram.
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Special functions
6.3. - Speed control R1
6.4. - Řízení otáček
6.3.1. - Varianty řízení otáček R1
6.3.1. - Modes R1
6.3. - Řízení otáček
6.2.3. - Varianty řízení otáček R1
Off: There is no speed control. The connected pump is only switched on or off with full
speed.
Mode M1: Control to the set ΔT, starting from max. speed:
After the purging time the controller switches to the set max. speed. If the temperature
difference ΔT between the reference sensors (collector and storage tank) is less than
the set value, then the speed is decreased by one stage after the sweep time elapses.
If the temperature difference between the reference sensors is greater than the set
value, then the speed is increased by one stage after the sweep time elapses. If the
controller has adjusted the speed of the pump down to the smallest stage and the ΔT
between the reference sensors is ΔT off, the pump is switched off.
Mode M2: Control to the set ΔT, starting from min. speed:
After the purging time the controller switches to the set min. speed. If the temperature
difference ΔT between the reference sensors (collector and storage tank) is greater
than the set value, then the speed is increased by one stage after the sweep time
elapses. If the temperature difference ΔT between the reference sensors is below the
set value, then the speed is decreased by one stage after the sweep time elapses. If
the controller has adjusted the speed of the pump down to the smallest stage and the
ΔT between the reference sensors is TΔoff, the pump is switched off.
Mode M3: Control to constant collector temperature, starting from min. speed:
After the purging time the controller switches to the set min. speed.
If the temperature at the collector sensor (or the respective R2 relay in variants with
a heat exchanger) is greater than the setpoint, then the speed is increased after the
sweep time expires.
If the temperature at the reference sensor (collector) is less than the setpoint, then the
speed is decreased after the sweep time expires.
Mode M4: When the primary storage is loaded, speed control works as in M3.
When the secondary storage is loaded, speed control works as in M2.
Setting range: M1, M2, M3, M4, off/Default setting: off
6.3.2. - Purging time
6.2.2. - Zpoždění říz.otáček
During this time period, the pump is running with full speed (100%) to ensure trouble-
-free startup. After this time has passed, the pump is set to speed control and is set to
max. speed or min speed, depending on the speed control mode (M1-M4) chosen.
Setting range: Purging time 5-600 sec. /Default setting: 8 sec.
6.3.3. - Sweep time
6.2.1. - Doba proplachu
Sweep time determines the inertia of the speed control to prevent quick fluctuations in
speed and subsequently also big fluctuations in temperature.
Setting range: Sweep time 1-15 min. /Default setting: 4 min.
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Special functions
6.3.4. - Max.speed
6.9.1. - Max. otáčky
The maximum speed of the pump is specified here.
Setting range: 15-100% /Default setting: 100%
The indicated percentages are guide values that may vary to a greater or
lesser extent depending on the system, pump and pump stage.
Caution
6.3.5. - Min. speed
6.9.2. - Min. otáčky
The minimum speed of the pump at relay R1 is specified here.
Setting range: 10 % to 95 % / Default setting: 30 %
The indicated percentages are guide values that may vary to a greater
or lesser extent depending on the system, pump model and pump stage.
Caution
100% is the maximum possible voltage/frequency of the controller.
6.3.6. - Setpoint
6.9.3. - Min. otáčky
This value is the control setpoint for Mode M3 (see 6.3.1. - Modes). If the value at
the collector sensor drops below this, the speed is reduced. If it rises above this, the
speed is increased.
Setting range: 0 to 90 °C / Default setting: 60 °C
6.3.7. - Temperature difference
6.9.4. - Min. otáčky
This value is an adjustable temperature difference for Modes M1 and M2 (see 6.3.1
- Modes). If the measured temperature difference ΔT between reference sensors is
lower than this value, the speed is reduced. If it is higher, the speed is increased.
Setting range: 3-50 K / Default setting: 10 K
6.7. - Heat quantity
When the heat meter mode “Constant flow rate“ is selected, an approximated heat quantity
is calculated using the values the user has to enter. These are type of glycol/antifreeze,
glycol portion and flow rate. These values are put into correlation with the temperature
data of selected sensors.
(choice in 6.7.5, 6.7.6 and 6.7.7).
The heat quantity measured in the mode “Constant flow rate” is a
calculated approximation for function control of the system.
Caution
6.7.1 - Heat metering
This function turns heat metering on and off.
Setting range: ON, OFF /
Default setting: OFF
6.7.5 - Antifreeze type
Set the type of anti freeze used.
Setting range: Etylen, Propylen /
30
Default setting: Etylen
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Special functions
6.7.6. – Glycol percentage
Concentration of antifreeze used in the system, in %.
Setting range: 0 % - 60 % /
6.7.7. - Fl ow rat e
This determines the fl ow rate in litres per minute that is used for the calcualtion of the heat quantity.
Setting range: 0 l/min. - 100 l/min. /
6.7.9. - ΔT Offset
Since for the heat meter the collector and the storage temperature are used, a difference to the flow respectively return flow temperature can be compensated by changing ΔT Offset accordingly.
Example: Displayed collector temp. 40 °C, measured flow temperature 39 °C, displayed storage
temperature 30 °C, measured return temperature 31 °C = results in a correction value of -20 % (displayed
ΔT 10 K, real ΔT 8 K = -20 % correction)
Default setting: 40 %
Default setting: 5 l/min.
Setting range: -50 % to +50 % /
Default setting: 0 %
6.8. - Sensor calibration
Deviations in the temperature values displayed, for example due to cables which are to
long or sensors which are not positioned optimally, can be compensated for manually
here. The settings can be made for each individual sensor (S1 to S4) in steps of 0.5 °C
(temperature) resp. 0.2 % of the measuring range of the VFS sensor per step.
Setting range: -100 to +100 (-50°C to +50°C) / Default setting: 0
These settings are only necessary in special cases at the time of initial
commissioning and may be one by a specialist only. Incorrect settings
Caution
may lead to an error.
6.9. - Commissioning
Starting the Setup Wizard guides you in the correct order through the basic settings
necessary for commissioning, and provides brief descriptions of each parameter in the
display.
Pressing the “esc” key takes you back to the previous value so you can look at the
selected setting again or adjust it if desired. Pressing the “esc“ more than once takes
you back step by step to the selection mode, thus cancelling the commissioning help.
May only be started by a specialist during commissioning! Observe the
explanations for the individual parameters in these instructions, and
Caution
check if further settings are necessary for your application.
6.10. - Factory settings
All of the settings that have been made can be reset, thus returning the controller to its
delivery state.
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Special functions
The entire parameterization, analyses, etc. of the controller will be lost
irrevocably. The controller must then be commissioned and set once
Caution
6.11. - Starting aid function
With some solar thermal systems, namely with evacuated tube collectors, it may occur
that measurement at the collector sensor takes too long or is not quite precise, which
is often caused by the sensor not being placed at the hottest location. When the start
aid function is activated, the following is carried out:
If the temperature at the collector sensor increases by the value specified under
„Increase” within one minute, then the solar pump is switched on for the set ”Purging
time” so that the medium to be measured can be moved to the collector sensor. If
this still does not result in a normal switch-on condition, then the start aid function is
subject to a 5-minute lockout time.
Starting aid setting range: on, off/Default setting: off
Purging time setting range: 2 - 30 s /Default setting: 5 s
Increase setting range: 1 °C -10 °C/Default setting: 3 °C/min.
again.
This function should only be activated by a specialist if problems arise
with acquisition of measurement values. In particular follow the instructi-
Caution
ons from the collector manufacturer.
6.12. - Time & date
This menu is used to set the current time and date.
For a proper operation of the controller and analysis of the system data it
is essential for the time to be set accurately on the controller. Please
Caution
note that if the mains voltage is interrupted the clock continues to run for
24 hours and then stops and needs to be reset after that.
6.13. - Daylight saving time
When this function is active, the controller’s clock changes automatically to and from
DST (DST, Daylight Saving Time).
Setting range: on, off/Default setting: on
6.14. - Sleep mode
When active, the displays backlight is switched off after 2 minutes of inactivity.
6.15. - Temperature unit
This menu is used to select the temperature unit that is displayed.
Setting range: °F or °C /Default setting: °C
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Menu lock
7. - Menu lock
Menu “7. Menu lock” can be used to secure
the controller against unintentional changing
of the set values.
The menu is closed by pressing “esc” or
selecting ”Exit menu lock”.
The menus listed below remain completely accessible despite the menu lock being
activated, and can be used to make adjustments if necessary:
1. Measurement values
2. Statistics
6.12 Time&date
7. M e n u l o ck
8. Service values
To lock the other menus, select “Menu lock on”. To enable the menus again, select
“Menu lock off”.
Setting range: on, off /Default setting: off
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Service values
8. - Service values
The menu “9. Service values” can be used for remote diagnosis by a specialist in the
event of an error etc.
Note down data at the time when an alarm or error occurs, e.g. into the following
Caution
The menu can be closed at any time by pressing “esc”.
table.
8.1 8.31
8.2 8.32
8.3 8.33
8.4 8.34
8.5 8.35
8.6 8.36
8.7 8.37
8.8 8.38
8.9 8.39
8.10 8.40
8.11 8.41
8.12 8.42
8.13 8.43
8.14 8.44
8.15 8.45
8.16 8.46
8.17 8.47
8.18 8.48
8.19 8.49
8.20 8.50
8.21 8.51
34
8.22 8.52
8.23 8.53
8.24 8.54
8.25 8.55
8.26 8.56
8.27 8.57
8.28 8.58
8.29 8.59
8.30 8.60
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9. - Language
Language
Menu “9. Language” can be used to select
the language for the menu guidance.
This is queried automatically during initial
commissioning.
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Malfunctions
Z.1 Malfunctions with error messages
If the controller detects a malfunction, the
red light flashes and the warning symbol
also appears in the display. If the error
(LED fl ashes +
warning symbol)
is no longer present, the warning symbol
changes to an info symbol and the red
light no longer flashes.
To obtain more detailed information on the
error, press the key under the warning or
info symbol.
Danger
Consult a specialist in the
event of an error!
Possible error messages: Notes for the specialist:
Sensor x defective .----------------> Means that either the sensor, the sensor input at
the controller or the connecting cable is defective.
(Resistance table see chap. B.2)
Collector alarm --------------------> Means that the collector has risen above the tem-
perature set in 5.7.
Restart ------------------------------> Means that the controller was restarted, for exam-
ple due to a power failure. Check the date&time!
Night circulation -------------------> Means that the solar pump is/was in operation
between 23:00 and 04:00.
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Z.2 Replacing the fuse
Repairs and maintenance may only be performed by a specialist. Before
working on the unit, switch off the power supply and secure it against
Danger
Danger
being switched on again! Check for the absence of power!
Only use the supplied spare fuse or a fuse of the same design with the
following specifications: T2A 250V.
Malfunctions
Z.2.1
Fuse
Z.3 Maintenance
If the mains voltage is switched on and
the controller still does not function or
display anything, then the internal device
fuse may be defective. In that case,
disconnect the device, open it, remove
the old fuse and check it. Replace the
defective fuse with a new one, locate the
external source of the error (e.g. pump)
and replace it. Then first re-commission
the controller and check the function of
the switch outputs in manual mode as
described in Chap. 3.2.
In the course of the general annual maintenance of your heating system
you should also have the functions of the controller checked by a
Caution
Performing maintenance:
- Check the date and time (see 6.12)
- Assess/check plausibility of analyses (see Chap. 2)
- Check the error log (see Chap. 2.4.)
- Verify/check plausibility of the current measurement values (see Chap. 1)
- Check the switch outputs/consumers in manual mode (see Chap. 3.2)
- If needed, optimize the parameter settings
specialist and have the settings optimized if necessary.
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Useful hints and tricks
Instead of setting the flow rate for the system using a flow rate limiter, it is better to
adjust the flow rate using the switch on the pump and by means of the “Max. speed”
setting on the controller (see 6.3.4.Max. speed). This saves electricity!
The service values (see 8) include not only current measurement values and operating
states, but also all of the settings for the controller. Write the service values down once
commissioning has been successfully completed.
In the event of uncertainty as to the control response or malfunctions the service
values are a proven and successful method for remote diagnosis. Write the service values down (see 8) at the time when the suspected malfunction occurs. Send the service
value table by fax or e-mail with a brief description of the error to the specialist.
In a system with a swimming pool, the pool can be easily switched off (e.g. for the
winter) using a simple function. Just press and hold the “esc” key for several seconds
while the system is displayed. As soon as the pool is switched off or on, the respective
information will be displayed.
It is recommended to record any analyses and data that are particularly important to
you at regular intervals.
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REGULUS spol. s r.o.
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