Regulus SRS2 TE Operating instructions

REGULUS SRS2 TE Solar Controller
EN
v. 1.3
Installation, Wiring and Operating Instructions

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 Specification 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
4. - Settings 20
4.1. - Tmin S(X) 20
4.4. - ΔT Solar S(X) 20
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
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. - Flow r ate 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
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

3
SRS2 TE
2 output mechanical relays 460 W
1 output mechanical relays 3.5 kW
3 inputs for Pt1000 temperature sensors
This Instruction Manual applies to the following hardware version:

4
Safety Instructions
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-EUlow voltage directive
- Directive 2014/30/EU- EUelectromagnetic compatibility directive
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
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.1 Specification
°C 0 102030405060708090100
Ω1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385
Description
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
Temperature sensors:
B.2 Temperature resistance table for Pt1000 sensors:

7
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 ex-
changer 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.3 Description
Description
- 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.4 Scope of supply
IMPORTANT INFORMATION ON DISPOSAL IN COMPLIANCE WITH THE EUROPEAN
DIRECTIVE 2002/96/ES
European Directive 2002/96/EC requires that the equi-
pment bearing this symbol on the product and/or its
packaging must not be disposed of with unsorted munici-
pal 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 pre-
vent 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
B.5 Disposal

8
Description
B.6 Hydraulic variants
1. Solar with hot water storage tank
2. Solar with hot water storage tank and el. heating element
3. Solar with hot water storage tank and gas boiler
4. Solar with hot water storage tank and heat pump
5. Solar with hot water storage tank w. recirculation
6. Solar with hot water storage tank w. recirculation and el. heating el.
7. Solar with hot water storage tank w. recirculation and gas boiler
8. Solar with hot water storage tank w. recirculation and heat pump
1. Solar with hot water storage tank 2. Solar with hot water storage tank
and el. heating element
3. Solar with hot water storage tank
and gas boiler
4. Solar with hot water storage tank
and heat pump
8. Solar with hot water storage tank
w. recirculation and heat pump
7. Solar with hot water storage tank
w. recirculation and gas boiler
6. Solar with hot water storage tank
w. recirculation and el. heating el.
5. Solar with hot water storage tank
w. recirculation
For hydraulic variants 6, 7 or 8, an extra Pt1000 temperature sensor is needed.

9
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 hou-
sing 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.
Installation

10
Installation
C.2 Electrical wiring
Danger
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
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.
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.
Caution
Warning
Warning
Warning