Regulus SRS3 User manual

REGULUS SRS3 Controller
EN
v. 2.0
Installation, Wiring and Operation Instructions

CONTENTS
A.1 Declaration 4
A.2 General Information 4
A.3 Explanation of symbols 4
A.4 Changes to the Controller 5
B.1 Specification 6
B.2 Description 7
B.3 Scope of supply 7
B.4 Disposal 7
B.5 Hydraulic variants 8
C.1 Wall installation 9
C.2 Electrical wiring 10
C.3 Installing the temperature sensors 11
D. - Terminal connection diagrams 12
E.1 Display and input 27
E.2 Commissioning help 28
E.3 Free commissioning 28
E.4 Menu structure 29
1. - Measurements 30
2. - Statistics 31
2.1. - Operating hours 31
2.2. - Average ∆T 31
2.3. - Heat output 31
2.4. - Graphic overview 31
2.5. - Error log 31
2.6. - Reset / clear 31
3. - Display mode 32
3.1. - Diagram 32
3.2. - Overview 32
3.3. - Alternating 32
4. - Operation mode 33
4.1. - Automatic 33
4.2. - Manual 33
4.3. - Off 33
4.4. - Fill system 33
5. - Settings 34
5.1. - Tmin S1 34
5.2. - Tmin S2 34
5.3. - Tmin S3 34
5.4. - Tmax S2 35
5.5. - Tmax S3 35
5.6. - ∆T R1 35
5.7. - ∆T R2 36
5.8. - Tset S3 36
5.9. - Hysteresis 36
5.10. - Priority sensor 37
5.11. - T priority 37
5.12. - Loading time 37
5.13. - Increase 37
5.14. - Thermostat periods 37
5.15. - „Party function“ 38
5.16. - Energy saving mode 38
5.17. - TecoS3 38
6. - Protective functions 39
6.1. - Seizing protection 39
6.2. - Frost protection 39
6.3. - System protection 40
6.4. - Collector protection 40
6.4.1. - Cooling functions 41
6.5. - Col.- Alarm 41
6.6. - Recooling 41
6.7. - Anti-Legionella 42
7. - Special functions 43
7.1. - Program selections 43
7.2.1.7. - Graph 44
7.3.1. - Speed control modes 44
7.3.2. - Purging time 45
7.3.3. - Sweep time 45
7.3.4. - Max. speed 45
7.3.5. - Min. speed 45
7.3.6. - Setpoint 45
7.4. - Time and Date 46
7.5. - Sensor calibration 46
7.6. - Commissioning 46
7.7. - Factory settings 46
7.8. - Heat quantity 47
7.8.1. - Heat metering 47
7.8.2. - Antifreeze type 47
7.8.3. - Glycol portion 47
7.8.4. - Flow rate 47
7.8.5. - ΔT Offset 47
7.9. - Start help function 48
8. - Menu lock 49
9. - Service values 50
10. - Language 51
Z.1. Malfunctions 52
Z.2 Replacing the fuse 53
Z.3 Maintenance 54

3
SRS3 V2
1 output mechanical relay, 230VAC
1 output electronic relay with a standard pump speed control
1 PWM/0-10V output for low-energy pumps
3 inputs for Pt1000 temperature sensors
This Instruction Manual applies to the following hardware version:

4
Safety Instructions
The manufacturer declares that the SRS3 Solar Controller is marked with the CE mark
and conforms to the following relevant safety regulations:
- Directive 2006/95/ES - EC low voltage directive (LVD)
- Directive 2004/108/ES - EC electromagnetic compatibility directive (EMC)
A.1 Declaration
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, com-
missioning 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 func-
tion 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 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 Controller
• No interference to the controller is allowed except for when approved by the Manu-
facturer in writing.
• It is forbidden to install any additional device 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:
Mains voltage 230VAC +/- 10%
Mains frequency 50 - 60Hz
Power consumption 1,5W - 2,3W
Internal fuse T2A / 250V slow blow
IP protection IP40
El. protection class II
Overvoltage category II
Pollution degree II
SRS3
Mechanical relay 460VA (AC1), 460W /AC3) 1 (R2)
Electronic relay min 5W, max.120W pro AC3) 1(R1)
Pt1000 sensors, from -40 °C to +300 °C 3
Permissible cable lengths for sensors and accessories:
Solar collector and outdoor sensor <30m
Other Pt1000 sensors <10m
PWM / 0...10V <3m
Electronic relay <3m
Mechanical relay <10m
Clock backup period 24hod
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 163mm x 110mm x 52mm
Installation aperture dimensions 157mm x 106mm x 31mm
Display fully graphic display, 128 x 128
Light diode multicolour
Operation 4 entry keys
Temperature sensors:

7
SRS3 Controller is designed for automatic control of solar thermal systems. The SRS3
model is intended to control solar systems with up to 2 independent solar arrays and
one or two heat sinks. The heat sink can be a storage water heater, a heat exchanger
for a swimming pool, and a thermal store for heating. All hydraulic variants are de-
scribed in Chapter 2.
- both graphics and texts on a backlit display
- simple viewing of the current measurement values
- approximate solar heat measurement
- 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
- further measurement and switching applications using a temperature difference and a
thermostat function
B.2 Description
Description
- SRS 3 Controller
- 3 screws 3.5 × 35 mm for wall installation
- 6 strain relief clips with 12 screws
- replacement fuse T2A/250V
- 3 Pt1000 temperature sensors
B.3 Scope of supply
IMPORTANT INFORMATION ON DISPOSAL IN COMPLIANCE WITH THE EURO-
PEAN DIRECTIVE 2002/96/ES
European Directive 2002/96/EC requires that the equip-
ment 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.4 Disposal

8
Description
B.5 Hydraulic variants
1
10
13 14
11 12
17
15 16
18 19 20
26 27 (2xT-Regl.)
2xT
28 (2xThermostat)
2xT
23 24
25
21 22
2 3 4
56 7 8
9
1. Solar system with a storage tank 15. Solar system with 2 collector arrays (East/West)
2. Solar system with a directly connected swimming pool 16. Solar system with 2 collector arrays and 2 pumps
3. Solid-fuel boiler 17. Solar system with 2 storage tanks and a zone valve
4. 2 storage tanks with a pump 18. Solar system with 2 storage tanks and 2 pumps
5. Return line preheating 19. Solar system with two storage tanks and a heat exchange pump
6. Thermostat 20. Solar system with a swimming pool, heat exchanger, prim. circ. sensor
7. Differential ΔT controller 21. Solar system + zone valve + thermostat
8. Two-way valve 22. Solar system + solid-fuel boiler
9. Solar system with a swimming pool via heat exchanger 23. Solar system + cooling 1
10. Solar system with thermostat for heating or cooling a storage tank 24. Solar system + cooling 2
11. Solar system with a thermally stratified storage tank 25. Solar system + cooling 3
12. Solar system with return line preheating 26. Solar system with a swimming pool and storage tank
13. Solar system with a by-pass 27. 2 temperature difference controllers 2×ΔT (no solar functions)
14. Solar system with a heat exchanger 28. 2 thermostats (no solar functions)

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 upper part of housing
from lower part.
3. Set the upper part of housing aside,
being sure not to damage 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 1.1.
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 ca-
bles 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.
With hydraulic variants D1-D8 the relays R1 and R2 are switched on
simultaneously. This enables to connect another heat sink to relay R2. If
speed control is set for D1, then relay R2 is on during the purge period.
Caution
Warning
Warning
Warning

11
C 2. 1 Wiring instructions:
1. Select a suitable hydraulic scheme (D.1
to D.20).
2. Open the controller as described in 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 screw-
driver (Fig. C 2.1) and wire the leads fol-
lowing the diagram.
5. Refit the upper housing part and fasten
with screw.
6. Switch on mains voltage and place con-
troller in operation.
C.2.1
Wiring instructions:
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 and S5 is 30 m and its cross section at least
0.75 mm2. Max. sensor lead length for S2 to S4 is 10 m and its cross section
at least 0.75 mm2. Make sure there is no contact resistance in the wiring! Se-
lect 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.
Caution
Warning

12
Installation
Low voltage, max. 12V– sensor connection
Terminal: connection for:
S1 (2x) sensor 1
S2 (2x) sensor 2
S3 (2x) sensor 3
Mains voltage 230V 50Hz
Terminal: connection for:
R1 Relay 1
N Neutral
R2 Relay 2
N Neutral
L Mains phase
N Mains neutral
PE protective conductor (green-yellow)
max. 12V
Warning
Mains voltage
230V
Danger
MainsRelaisKleinspannungen
S3V1
S3 S2 S2 S1 S1 R2 R1LNNN
D. - Terminal block wiring
Sensor connection – max 12V Relay Mains voltage –
100 - 240V 50Hz

13
Installation
D Terminal wiring for separate variants
D.1 Solar system with storage tank
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
–
Danger
Relays R1 and R2 switch at the same time in this
wiring, so the pump can be wired to R2.
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 pump L
N pump N
PE protective conductor
(green-yellow)
D.2 Solar system with a directly connected swimming pool
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 kolektor
S2 (2x) sensor 2 swimming pool
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pool pump L
N pool pump L
R2 free
N free
PE protective conductor
(green-yellow)
Sensor connection
– max 12V
Mains side
– 230V 50Hz
Danger
Warning
Example: solar system with a storage tank and el.
heating element with integrated thermostat.
Mains
Mains

14
Installation
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 storage tank 1
S2 (2x) sensor 2 storage tank 2
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 -
N -
PE protective conductor
(green-yellow)
Caution
Heat is transferred from tank 1 to
tank 2.
D.4 2 storage tanks with a heat exchange pump
Sensor connection
– max 12V
Mains side
– 230V 50Hz
Danger
Warning
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor solid-fuel boiler
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 -
N -
PE protective conductor
(green-yellow)
D.3 Solid-fuel boiler
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
Danger
Mains
Mains

15
D.5 Return line preheating
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 storage tank
S2 (2x) sensor 2 heating return
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 -
N -
PE protective conductor
(green-yellow)
Caution
Note: Zone valve on the return line:
R1 off = valve closed = flow B-AB = no backup heating
R1 on = valve open = flow A-AB = flow into the storage tank
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 storage tank
S2 (2x) sensor 2
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 -
N -
PE protective conductor
(green-yellow)
Note: If sensor S2 is connected, then S1 is the switch-on
sensor and S2 is the switch-off sensor.
Caution
Installation
D.6 Thermostat
Sensor connection
– max 12V
Mains side
– 230V 50Hz
Danger
Warning
Sensor connection
– max 12V
Mains side
– 230V 50Hz
Danger
Warning
Mains
Mains

16
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 heating
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 valve L
N valve N
R2 -
N -
PE protective conductor
(green-yellow)
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 (control)
S2 (2x) sensor 2 (reference)
S3 (2x) sensor 3
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 -
N -
PE protective conductor
(green-yellow)
Controller switching function: If the tem-
perature at S1 exceeds that at S2, the
R1 pump relay will close.
D.8 Two-way valve
D.7 Differential ΔT controller (no solar functions)
Sensor connection
– max 12V
Mains side
– 230V 50Hz
Danger
Warning
Sensor connection
– max 12V
Mains side
– 230V 50Hz
Danger
Warning
Installation
Mains
Mains

17
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector
S2 (2x) sensor 2 storage tank lower
S3 (2x) sensor 3 storage tank upper
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 Thermostat L
N Thermostat N
PE protective conductor
(green-yellow)
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
–
Danger
D.10 Solar system with thermostat for heating or cooling a storage tank
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector
S2 (2x) sensor 2 swimming pool
S3 (2x) sensor 3 heat exchanger
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 heating pump L
N heating pump N
R2 pool pump L
N pool pump N
PE protective conductor
(green-yellow)
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
–
Danger
D.9 Solar system with a swimming pool via heat exchanger
Installation
Mains
Mains

18
Note: Zone valve on the return line:
R2 off = valve closed = flow B-AB = no backup heating
R2 on = valve open = flow A-AB = flow into the storage tank
Installation
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3 zpátečka topení
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 zone valve L
N zone valve N
PE protective conductor
(green-yellow)
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
–
Danger
D.12 Solar system with return line preheating
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector
S2 (2x) sensor 2 storage tank lower
S3 (2x) sensor 3 storage tank upper
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 zone valve L
N zone valve N
PE protective conductor
(green-yellow)
D.11 Solar system with a thermally stratified storage tank
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
–
Danger
Note: Zone valve wiring:
R2 off = valve closed = flow AB-B = flow into the tank lower section (S2 sensor)
R2 on = valve open = flow AB-A = flow into the tank upper section (S3 sensor)
Example: Solar heat will be stored either to the upper or lower tank section, depending
on the temperature available from the solar thermal system.
Mains
Mains

19
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3 return
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 zone valve L
N zone valve N
PE protective conductor
(green-yellow)
D.13 Solar system with a by-pass
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
–
Danger
Note: Zone valve wiring:
R2 off = valve closed = flow B-AB = heat flow to the storage tank
R2 on = valve open = flow A-AB = heat flow through by-pass
Installation
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3 solar out
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 secondary pump L
N secondary pump N
R2 primary pump L
N primary pump N
PE protective conductor
(green-yellow)
Sensor connection
– max 12V
Warning
Mains side
– 230V 50Hz
–
Danger
D.14 Solar system with a heat exchanger
Mains
Mains

20
Installation
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector 1
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3 collector 2
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 collect. 1 pump L
N collect. 1 pump N
R2 collect. 2 pump L
N collect. 2 pump N
PE protective conductor
(green-yellow)
Low voltage - sensor connection
Terminal: connection for:
S1 (2x) sensor 1 collector 1
S2 (2x) sensor 2 storage tank
S3 (2x) sensor 3 collector 2
The polarity of the sensors is freely selectable.
Mains voltage - 230V 50Hz
Terminal: connection for:
L mains phase conductor
N mains neutral conductor
R1 pump L
N pump N
R2 zone valve L
N zone valve N
PE protective conductor
(green-yellow)
D.15 Solar system with 2 collector arrays (East/West)
Sensor connection
– max 12V
Sensor connection
– max 12V
Warning
Warning
Mains side
– 230V 50Hz
–
Danger
Mains side
– 230V 50Hz
–
Danger
D.16 Solar system with 2 collector arrays and 2 pumps
Note: Zone valve wiring:
R2 off = valve closed = flow AB-B = flow from the collector array 1 (S1 sensor)
R2 on = valve open = flow AB-A = flow from the collector array 2 (S3 sensor)
Mains
Mains