Regulus SRS1 T User manual

www.regulus.eu
SRS1 T
SRS1 T
EN
Installation and Operation Manual
REGULUS SRS1 T Solar Controller

A. - Safety Instructions 4
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
A.5 Warranty 5
B. - Description 6
B.1 Specikace 6
B.2 Temperature resistance table for Pt1000 sensors 6
B.3 Description 7
B.4 Disposal 7
C. - Installation 8
C.1 Wall installation 8
C.2 Electrical wiring 9
C.3 Installing the temperature sensors 10
D. Terminal block wiring 11
D.1 Hydraulic variants 12
E. - Operation 13
E.1 Display and input 13
E.2 Commissioning help 14
E.3 Free commissioning 14
E.4 Menu sequence and menu structure 15
1. - Measurements 16
2. - Statistics 17
2.1. - Operating hours 17
2.2. - Average ΔT 17
2.4. - Graphic overview 17
2.5. - Message log 17
2.6. - Reset/Clear 17
3. - Display mode 18
3.1. - Schematic 18
3.2. - Overview 18
3.3. - Alternating 18
3.4. - Eco display mode 18
4. - Operating mode 19
4.1. - Auto 19
4.2. - Manual 19
4.3. - O󰀨 19
4.4. - Fill system 19
5. - Settings 20
5.1. - Tmin S1 19
5.4. - Tmax S2. 19
5.8. - ΔT R1 20
5.11. - Tref On / Tref O󰀨 (for variants 1 and 2) 20
5.21. - Thermostat periods R1 (for variants 1 and 2) 21
5.23. - Purging time (variant 3) 21
5.24. - Circ. pause time (variant 3) 21
5.25. - Circ. Tmin (variant 3) 21
5.26. - Circ. hysteresis (variant 3) 21
5.27. - Circ. sensor (variant 3) 21
5.28. - Circ. periods (variant 3) 21
6. - Circ. hysteresis (variant 22
6.1. - Seizing protection 22
6.2. - Frost protection 22
6.3. - System protection 22
6.4. - Collector protection 23
6.5. - Collector alarm 23
6.6. - Recooling 23
6.7. - Anti-legionella 23
6.7.2. - AL Tset S2 23
6.7.3. - AL resid. time 23
6.7.4. - AL heat 24
6.7.5. - AL times 24
7. - Special functions 25
7.1. - Program selection 25
7.2. - Signal V1 25
7.2.1. - Type of Signal 25
7.2.2. - Prole 25
7.2.3. - Output Signal 26
7.2.4. - 0-10V / PWM o󰀨 26
7.2.5. - 0-10V / PWM on 26
7.2.6. - 0-10V / PWM Max 26
7.2.7. - Show signal 26
7.3. - Speed control 27
7.3.1. - Speed control R1 27
7.3.2. - Purging time 28
7.3.3. - Sweep time 28
7.3.4. - Maximum speed 28
7.3.5. - Minimum speed 28
7.3.6. - Setpoint 28
7.3.7. - Setpoint ΔT 28
7.4. - Time & date 29
7.5. - Sensor calibration 29
7.6. - Commissioning 29
7.7. - Factory settings 29
7.8. - Starting aid 30
7.9. - Daylight saving time 30
8. - Menu lock 31
9. - Service data 32
10. - Language 33
Z. - Malfunctions, additional information 34
Z.1. Malfunctions with error messages 34
Z.2 Replacing the fuse 35
Z.3 Maintenance 36
CONTENTS

3
This Instruction Manual applies to the following hardware versions:
SRS1 T
SRS1 T
1 output mechanical relay 230VAC
1 PWM/0-10V output for high-efficiency pumps
3 inputs for Pt1000 temperature sensors

4
Safety Instructions
The manufacturer declares that the SRS1 T Solar Controller is marked with the CE
mark and conforms to the following relevant safety regulations:
- Directive 2014/35/EU - EC low voltage directive (LVD)
- Directive 2014/30/EU - EC electromagnetic compatibility directive (EMC)
A.1 EC Declaration of Conformity
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.
A.2 General information
Danger
Caution
A.3 Explanation of symbols
Failure to observe these instructions can result in danger to life from
electric voltage.
Danger
Failure to observe these instructions can result in serious damage to
health such as scalding, or even life-threatening injuries.
Warning
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.
- Please read carefully!

5
The Unit has been manufactured and tested with regard to high quality and safety
requirements. It is covered by a legal warranty of 2 years from the date of purchase.
The warranty and liability shall not include, however, any injury to persons or material
damage that is attributable to one or more of the following causes:
- Failure to observe this installation and operation manual.
- Improper installation, commissioning, maintenance or operation.
- Improperly executed repairs.
- Unauthorized structural changes to the unit.
- Any additional components added that have not been tested with the controller.
- Damage caused to the controller by continuing use despite it being obviously
damaged.
- Use of non-original spare parts.
- Use of the device for other than its intended purpose.
- Operation above or below the limit values listed in the „Specification“ section.
- Force majeure.
A.5 Warranty
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.

6
B.2 Temperature resistance table for Pt1000 sensors
B.1 Specification
°C 0 10 20 30 40 50 60 70 80 90 100
Ω1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385
Description
Electric specification:
Voltage 230VAC +/- 10%
Mains frequency 50 - 60Hz
Power consumption 0,5W - 2,5W
Internal fuse T2A / 250V slow blow
IP rating IP40
El. protection class II
Overvoltage category II
Pollution degree II
SRS1 T
Mechanical relay, 3000 VA (AC1), 3000 W (AC3) 1 (R1)
0-10V output, 10% tolerance, 10 kΩ, or PWM output, 1kHz, 10V 1 (V1)
Pt1000 sensors, from -40 °C to +300 °C 3 (S1 - S3)
Permissible cable length of sensors and accessories:
Collector sensor <30 m
other Pt1000 sensors <10 m
PWM / 0-10V <3 m
Mechanical relay <10 m
Clock backup period 24 hrs
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 3-part, ABS plastic
Installation methods wall installation, optionally panel installation
Overall dimensions 115 × 86 × 45 mm
Installation aperture dimensions 108 × 82 × 25,2 mm
Display fully graphic display, 128 x 64
LED multicolour, red/green
Operation 4 entry keys

7
SRS1 T Controller is designed for automatic control of solar thermal systems. The SRS1
T model is intended to control solar thermal systems with up to 2 solar arrays and one
or two heat consumers. The heat 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 D.1.
- 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 interactive explanations
- menu lock can be activated to prevent unintentional setting changes
- usual preset parameters in factory setting
- further measurement and switching applications using a temperature difference and
a thermostat function
B.3 Description
Description
IMPORTANT INFORMATION ON DISPOSAL IN COMPLIANCE WITH THE
EUROPEAN DIRECTIVE 2002/96/ES
This product must not be disposed of with unsorted municipal waste. Please dispose of
this product by returning it to the point of sale or to your local municipal collection point
for recycling.
Respecting these rules will help to preserve, protect and improve
the quality of the environment, protect human health and utilize
natural resources prudently and rationally.
The crossed out wheeled bin with marking bar, printed either in
the Manual or on the product itself, identifies that the product
must be disposed of at a recycling collection site.
WEEE registration number:
02771/07-ECZ
B.4 Disposal

8
C.1.1
C.1.2
Warning
C.1 Wall installation
Install the controller in dry areas only.
Installation instructions:
1. Unscrew cover screw completely.
2. Carefully pull the upper part of the
housing from the lower part, see C.1.1.
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.
Installation

9
Installation
C.2 Electrical wiring
Danger
Before working on the unit, switch o󰀨 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
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 right-hand side of the unit, and mains voltage and relay
cables only into the left-hand side.
The controller is not equipped with a mains switch. For this purpose
please use e.g. a circuit breaker.
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.
Warning
Warning
Warning

10
C 2. 1 Wiring instructions:
1. Select the necessary hydraulic variant
(D.1 - hydraulic variants).
2. Open the controller as described in
chapter C1.
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.2.1
Installation
C.3 Installing the temperature sensors
The temperature sensor cables must be routed separately from mains voltage cables.
The controller operates with Pt1000 temperature sensors.
Max. sensor lead length for S1 sensor is 30 m and its cross section at least 0.75 mm2.
Max. sensor lead length for S2 and S3 is 10 m and its cross section at least 0.75 mm2.
Make sure there is no contact resistance in the wiring! 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.
Instructions on how to use the terminal block:
1. Insert a flat screwdriver into the upper opening, pushing
the inner spring downwards. Keep the screwdriver
inserted.
2. Push the stripped cable end into the bottom opening.
3. Pull out the screwdriver. The spring will secure the cable
in place.
C.2.2
Caution
Warning
When connecting high-efficiency pumps with PWM, it is necessary to respect
the right wiring (i.e. to wire the “PWM out” terminal at the controller with “PWM in”
terminal at the pump, and “GND” at the controller with “GND” at the pump).
Warning

11
The temperature sensor cables must be routed separately from mains voltage cables.
Installation
D. - Terminal block wiring
Sensor connection
– max. 12V
Warning
Mains voltage
230V
Danger
Warning
Mains voltage
230V
Danger
Sensor connection
– max. 12V
NAPÁJENÍ
100-240 VAC
L N R1 R
NAPÁJENÍ
100-240 VAC
L N R1 R
NAPÁJENÍ
100-240 VAC
L N R1 R
NAPÁJENÍ
100-240 VAC
L N R1 R
ČIDLA PWM
S1 S1 S2S2S3S3 V - Vi
ČIDLA PWM
S1S1S2S2S3S3 V - Vi
ČIDLA PWM
S1 S1 S2S2S3S3 V - Vi
ČIDLA PWM
S1 S1 S2S2S3S3 V - Vi
MAINS
100-240 VAC
L N R1 R
MAINS
100-240 VAC
L N R1 R
POWER S U PPL Y
100-240 VAC
L N R1 R
MAINS
100-240 VAC
L N R1 R
SENSORS PWM
S1 S1 S2 S2 S3 S3 V - Vi
SENSORS PWM
S1 S1 S2S2S3S3 V - Vi
SENSORS PWM
S1 S1 S2S2S3S3 V - Vi
SENSORS PWM
S1 S1 S2 S2 S3 S3 V - Vi
Low voltage, max. 12V– sensor
connection
Terminal: connection for:
S1 sensor 1
S1 sensor 1 (GND)
S2 sensor 2
S2 sensor 2 (GND)
S3 sensor 3
S3 sensor 3 (GND)
V 0-10V/PWM output for controllable
high-efficiency pumps
- 0-10V gnd./PWM output for
controllable high-efficiency pumps
Vi PWM input to retrieve actual flow rate
of some high-efficiency pumps
Mains voltage 230V 50Hz
Terminal: connection for:
L mains live L
N mains neutral N
R1 relay R1 (switched contact)
R relay R1 (mains live)

12
Installation
D.1 Hydraulic variants
The following illustrations should be viewed only as schematic diagrams showing the respective
hydraulic variants, do not claim to be complete. The controller does not replace safety device
under any circumstances. Depending on the specic application, additional system components
and safety components may be mandatory, such as check valves, non-return valves, safety
temperature limiters, scalding protectors, etc., and must therefore be provided.
Warning
S2
R1+V1
V1
S2
S3
R1
S2
S3
S1
S1
S1S1
V1
R1
S2
S3
V1
R1
S2
S1
V1 V1 R1 R1
S2
4
Hydraulická zapojení
SRS1 T
5
3
2
6
1
S1
4. Solar thermal system3. Solar thermal system with DHW recirculation
1. Solar thermal system
with aux. electric heat source 2. Solar thermal system with switching boiler
5. Solar thermal system with heat
exchanger
6. Solar thermal system with heat exchanger
and pool

13
Examples of display symbols:
Pump (rotates in operation)
Valve (direction of flow black)
Solar collector
Hot water storage tank
Swimming pool
Temperature sensor
Heat exchanger
Load pause
Warning/error message
New information available
(1)
(2)
(3)
(4)
The display (1) shows graphic and text info on
the hydraulic variant, set and measured values
and other text info.
The 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.
Examples of key functions:
+/- = increase/decrease values
▼/▲ = scroll menu up/down
YES/NO = confirm/reject
Info = additional information
Back = to previous screen
ok = confirm selection
Operation
E.1 Display and input

14
E.2 Commissioning help - setup wizard
Operation
The 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
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 setup wizard. Finally, menu 4.2 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.
If you decide not to use the commissioning help, you should make the necessary settings in the
following sequence:
• Menu 10. Language
• Menu 7.4 Time and date
• Menu 7.1 Program selection
• Menu 5 Settings, all values
• Menu 6 Protective functions if modications are necessary
• Menu 7 Special functions if additional changes are necessary
Note: Setup wizard is available in Menu 7.6
Finally, menu 4.2 under operating mode “Manual” should be used to test the switched outputs
with the consumers connected, and to check the sensor values for plausibility. Then switch on
automatic mode.
E.3 Free commissioning
Caution
Observe the explanations for the individual parameters on the following pages,
and check whether further settings are necessary for your application.

15
E.4 Menu sequence and menu structure
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:
Operation
1. Measurements
2. Statistics
3. Display mode
4. Operating mode
5. Settings
6. Protections
7. Special functions
8. Menu lock
9. Service data
10. Language
Current temperature values with explanations
Function control of the system with operating hours etc.
Selection of the initial display default mode
Automatic mode, manual mode or switch unit o󰀨
Set parameters needed for normal operation
Solar and frost protection, recooling...
Commissioning help, program selection, sensor calibration, clock etc.
Lock against unintentional setting changes
For diagnosis in the event of an error
Language selection
In the graphics menu the display shows (from the top right corner downwards) temperatures at
connected sensors, then the current speed of a PWM controlled solar pump, and the current flow
rate in the bottom right corner, calculated from the incoming PWM signal (if the incoming PWM
signal from the pump is connected).
Caution
The displayed ow rate through the solar thermal system is indicative only!
Caution
If the ow rate reading is connected using the PWM signal from the pump, the
pump is running and the displayed ow rate is 0 l/min., then it is a fault of the
pump electronics (see the pump instruction manual). If the displayed ow rate is
0-2 l/min. and the pump is running, then it is probably a fault in the hydraulics of
the solar circuit that obstructs ow (throttled by a valve, blocked lter etc.).

16
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”.
If “--” appears on the display instead of the measurement value, then there may
be a defective temperature sensor or its connection to the controller. 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 display values can be
compensated for using the function of sensor compensation - see Chapter 7.5.
What sensors are displayed depends on the selected program, sensors
connected and settings.
Measurements
1. - Measurements
Caution

17
2. - 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”.
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 time
set in the controller may result in data being deleted, recorded incorrectly
or overwritten.
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. - Average ΔT
Display of the average daily temperature difference between the solar collector and
the thermal store.
This provides a clearly-organised display of the data listed under 2.1. - 2.2. as a bar
graph. Various time ranges are available for comparison. The two left-hand keys can
be used to page through the data.
Resetting and deleting the individual analyses. The function “All statistics” clears all
statistics but not the error messages.
Display of the last 10 events occurring in the system with indication of date and time.
Caution
2.6. - Reset/Clear
2.5. - Message log
2.4. - Graphic overview

18
3. - Display mode
Display mode
Menu “3. Display mode” is used to
define the controller’s display for normal
operation.
This display appears whenever two minutes
go by without any key being pressed. The
main menu appears again when a key is
pressed. The menu is closed by pressing
“esc” or selecting “Exit display mode”.
In the “Schematic” mode, the graphic display of the selected hydraulic variant is shown
together with measured temperatures and operating conditions of connected consumers.
3.1 - Schematic
3.2 - Overview
In the “Overview” mode, the measured temperatures and operating conditions of
connected consumers are shown in a text form.
In the “Alternating” mode, the “Schematic” and “Overview” modes are displayed alternately in
5s intervals.
3.3 - Alternating
3.4 - Eco display mode
After 2 min. of inactivity the display goes to standby mode, turning off the illumination. The
backlight does not turn off when the on-screen error message or information message.
If a message or alarm is displayed, the backlight is not switched off until
the message is read.
Caution

19
4. - Operating mode
In menu “4. Operating mode“ the
controller can either be switched to
automatic mode, switched off, or switched
to a manual operating mode.
The menu is closed by pressing “esc” or
selecting “Exit operating mode”.
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!
4.1. - Auto
Operating mode
4.2. - Manual
4.3. - Off
When the operating mode “Off” is activated, all controller functions are
switched off. This can lead, for example, to overheating on the solar
collector or other system components. The measured temperatures are
displayed even when the controller is Off.
Warning
Danger
4.4. - Fill system
This is not used for Regulus solar thermal systems.
The relay and thus the connected consumer are switched on and off 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
current operation can lead to system damage or overheating of water in
the hot water storage tank!

20
5. - Settings
The system parameters are set in menu “5.
Settings”.
5.1. - Tmin S1
Sensor S1 switch-on temperature
If this value is exceeded at sensor S1 and the other conditions are also met, then the
controller switches the associated pump and/or valve on. If the temperature at sensor S1
drops below this value by 5 °C, then the pump and/or the valve are switched off again.
The menu is closed by pressing “esc” or selecting
“Exit settings”.
Settings
Switch-on/switch-off temperature difference for solar heat
If this temperature difference between the reference sensors is exceeded and the other
conditions are also met, then the controller switches the applicable relay on. When the
temperature drops to ΔT sol Off, then the relay is switched off.
5.8. - ΔT sol.
If the set temperature difference is too small, this may result in ineffective
operation, depending on the system and sensor positions. Special switching
conditions apply for speed control (see 7.3. - Speed control V1)!
Caution
Caution
Various settings can be made depending on the selection of hydraulic variant
1-6. The following pages contain generally valid descriptions for the settings.
5.4. - Tmax S2
Danger
Sensor S2 switch-o󰀨 temperature
If this value is exceeded at sensor S2 and the other conditions are also met, then the
controller switches the associated pump and/or valve o󰀨. If the temperature at sensor S2
drops below this value, then the pump and/or the valve are switched on again.
Temperature values which are set rather high will allow higher solar heat
accumulation but it shall be checked that all system components are
resistant to high temperature and scalding protection is provided. Regulus
solar systems are safe for heating water up to 95 °C.