Regulus SRS6 User manual

REGULUS SRS6 EP Controller
EN
ver. 1.2
Installation and Operating Instructions

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Contents
Part A - Safety
A1 EC Declaration of Conformity 4
A2 General Information 4
A3 Explanation of Symbols 4
A4 Changes to the unit 5
Part B - Description
B 1 Technical data 6
B 2 Temperature sensors Pt1000 7
B 3 Description 7
B 4 Scope of supply 7
Part C - Installation
C 1 Electrical connection 8
C 2 Wall installation 9
C 3 Installing the temperature sensors 11
Part D Terminal connection
D 1 Terminal block wiring 12
D 2 Hydraulic variants / systems 13
Part E - Operation
E 1 Display and input 19
E 2 Commissioning help 20
E 3 Free commissioning 20
E 4 Menu sequence and menu structure 21
Menu settings
1 Measurement values 22
2 Statistics 23
3 Operating modes 24
4. Settings 25
5. Protective functions 28
6. Special functions 30
7. Menu lock 49
8. Service values 49
9. Language 49
Part Z - Malfunctions and maintenance
Z 1 Malfunctions with error messages 50
Z 2 Replacing the fuse 51
Z 3 Maintenance 52
Z 4 .Useful hints and tricks 53
Z 5 Disposal 53
Part J - Appendix
J Pump control - types 54

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This Instruction Manual applies to the following hardware version:
SRS6 EP
1 output mechanical relay, 230VAC (with changeover contacts)
2 output electronic relay with a standard pump speed control
2 PWM/0-10V output for low-energy pumps
6 inputs for Pt1000 temperature sensors
2 VFS flowmeter direct sensor inputs

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Part A - Safety
A1 Declaration
The manufacturer declares that the SRS6 EP Solar Controller is marked with the CE mark
and conforms to the following relevant safety regulations:
- Directive 2006/95/EC = EC low voltage directive
- Directive 2004/108/EC - EC electromagnetic compatibility directive
A2 General Information
- please read carefully!
These installation and operating instructions contain basic instructions and important in-
formation 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 control-
ler.
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 3 - Explanation of Symbols
Failure to observe these instructions can result in danger to life from 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.
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Caution
Danger
Caution

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A 4 - Changes to the unit
• No interference to the controller is allowed except for when approved by the Manufacturer
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 af-
fected – 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.
Changes to the unit can compromise the safety and function of the unit or the en-
tire system.
Danger

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Part B - Description
B 1 - Specification
Electric specification:
Voltage 100 to 240 V ~
Mains frequency 50-60 Hz
Power consumption 0,5 - 2,5W
Internal fuse 2A slow blow, 250 V, type T2A
IP protection IP40
El. protection class II
Overvoltage category II
Pollution degree II
Ver. 4
Mechanical relay, 460VA (AC1), 460W /AC3) 1 (R3)
Electronic relay, min 5W, max.120W for AC3 2 (R1-R2)
0-10V output, 10% tolerance, 10kΩor PWM output, PWM, 1kHz, 10V 2
Pt1000 sensors, from -40 °C to +300 °C 6
VFS flowmeter with temperature sensor, range from 0 °C do 100 °C, (-25 °C /120 °C
short term)
2
VFS flowmeter - flow rate range: 1 l/min - 12 l/min (VFS1-12)
2 l/min - 40 l/min (VFS2-40)
5 l/min - 100 l/min (VFS5-100)
10 l/min - 200 l/min (VFS10-200)
Network connections
CAN Bus
Permissible cable length of sensors and appliances:
Collector and outdoor sensor <30m
other Pt1000 sensors <10m
VFS/RPS flowmeter <3m
CAN bus <3m
PWM / 0...10V <3m
Electronic relay <3m
Mechanical relay <10m
Clock backup period 24h
Permissible ambient conditions:
Ambient temperature
for controller operation 0-40 °C
for transport/storage 0-60 °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 163 × 110 × 52 mm
Installation aperture dimensions 157 × 106 × 31 mm
Display fully graphic display, 128 × 128
LED multicolour
Operation 4 entry keys

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°C 0 102030405060708090100
Ω1000 1039 1077 1116 1155 1194 1232 1270 1308 1347 1385
B 2 - Temperature sensors:
B 3 - Description
SRS6 EP Controller is designed for automatic control of solar thermal systems. The SRS6 EP model is inten-
ded to control solar thermal systems with up to 2 independent solar arrays and one or two solar consumers.
The solar consumers 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
- exact 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 4 - Scope of supply
- SRS6 EP Controller
- 3 screws 3.5 × 35 mm for wall installation
- 6 strain relief clips with 12 screws
- replacement fuse 1xT2A/250V
- 5 temperature sensors

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C 1 - Electrical wiring
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 sensor have to have the same ground potential. The VFS sensor uses a functional
earth connector (PELV). The PE-connector of the controller has to be connected to the pipe system
near the sensor.
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C 2 - 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 upper part of housing aside, being sure not to
touch the electronics when doing so.
4. Hold the lower part of the housing up to the select-
ed 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.
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.
Fig.C 2.1
Fig. C 2.2
fixing points
fixing points fixing points

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Wiring instructions:
1. Make sure that the controller circuit breaker is off
and that the power supply is off.
2. Select the necessary hydraulic variant (Chapter
D.2. on page 13).
3. Open the controller.
4. 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 2.3).
5. Open the terminals using a flat screwdriver
(Fig. C 2.4) and wire the leads following the
diagram.
6. Refit the upper housing part and fasten with screw.
7. Switch on mains voltage and place controller in
operation.
C.2.3.
C.2.4.

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C 3 - Installing the temperature sensors
The controller operates with Pt1000 temperature sensors.
The temperature sensor cables must be routed separately from mains voltage cables.
Max. sensor lead length for S1 and S5 is 30 m and its cross section at least 0.75 mm2. Max. sen-
sor 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!
Make sure that the terminals of extension cables and sensors are properly tightened. Use only
immersion or pipe-mounted sensors.
The VFS shall be connected to the solar return. Observe the correct flow direction of solar fluid
and its max. permissible temperature range (-40 °C to +100 °C, -2 5°C to +120 °C in short term).
The flowmeter cables must be routed separately from mains voltage cables!
Caution
Caution
Caution
Caution

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D - TERMINAL CONNECTION
D 1 - Terminal block wiring
Example: solar system with a storage tank and el. heating rod with an integrated thermostat.
Sensor connection - max. 12V
Caution
Mains voltage
100-240V 50Hz
Danger
D 1 - Terminal block wiring
On the circuit board:
SRS6 EP ver. V4:
VFS1 Grundfos Direct Sensor
VFS2 Grundfos Direct Sensor
CAN1 CAN Bus
CAN2 CAN Bus
S6
VFS2 VFS1
CAN CAN
V1
V2
+S5 S4 S3 S2 S1 -PELV R3I
R3 R2 R1 L N
N
-
Low voltage - sensor connection
Terminal: connection for:
S1 Sensor 1
S2 Sensor 2
S3 Sensor 3
S4 Sensor 4
S5 Sensor 5
V1 Output 0-10V / PWM
Terminal „ – „ is connected with a common
terminal block for S1-S4 sensors and VFS
sensors and also with earth on the mains side. The power supply of low-energy pumps
with 0-10V / PWM pumps can be connected to
the corresponding relay (V1 -> R1, R2 -> V2),
since the relays are switched on and off with
the signal.
Mains voltage 100 - 240V 50Hz
Terminal: connection for:
R2 Relay 2
R1 Relay 1
R3 Relay 3 (normally open, NO)
R3I Relay 3 (normally closed, NC)
L Mains phase
N Mains neutral
PE protective conductor
(green-yellow)

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D 2 - Hydraulic variants / systems
Hydraulic var.1
Solar
Hydraulic variant 2
Solar + pool
Hydraulic variant 3
Solid fuel boiler
Hydraulic variant 4
Storage transfer
Hydraulic variant 5
Return flow increase
Hydraulic variant 6
Thermostat
Hydraulic variant 7
Universal DeltaT
S1 Collector Collector Boiler Storage1 Storage top Storage top Source sensor sensor S2 Storage Pool Storage Storage2 Return Storage bottom Target
sensor
S3 S4 S5 S6 VFS1 VFS2 R1 / V1
Solar pump
Pump 1PumpCirculation pumpSolar
pump
R2 - -
3-way valve--3R Thermostat

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Hydraulic variant 8
2-way valve
Hydraulic variant 9
Solar + heat exch. + pool
Hydraulic variant 10
Solar + thermostat
Hydraulic variant 11
Solar + 2-Zone Storage + Valve
Hydraulic variant 12
Solar + return fl ow increase
Hydraulic var.13
Solar + Bypass
Hydraulic variant 14
Solar + heat exchanger
S1 Source
sensor
Collector Collector Collector Collector Collector Collector
S2 Storage Pool Storage Storage top Storage bottom Storage Storage
ssapyBStorage middleStorage bottomThermostat3S
Heat exchangerReturnHeat exchanger4S
S5 S6 VFS1 VFS2 R1 / V1
both pumps Solar pump Solar pump Solar pump Solar pump Solar pump
R2 Secondary pump
Bypass valveBypass valveBypass valveThermostatValve3R

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Hydraulic variant 15
Solar + 2. Collector + Valve
Hydraulic variant 16
Solar + 2. Collector + 2. Pump
Hydraulic variant 17
Solar + 2. storage with valve
Hydraulic variant 18
Solar + 2. Storage + 2. Pump
Hydraulic variant 19
Solar + Storage transfer
Hydraulic variant 20
Solar + heat exch. + pool
Hydraulic variant 21
Solar + thermostat as valve
S1 Collector 1 Collector 1 Collector Collector Collector Collector Collector S2 Storage Storage Storage1 Storage1 Storage1 bottom Pool Storage bottom
Storage topStorage2 topStorage2Storage23S
S4 Storage1 top Heat exchanger S5 Collector2 Collector2 Thermostat S6 VFS1 VFS2 R1 / V1 Solar pump Solar pump
Coll. 1
Solar pump Solar pump
storage1
Solar pump Solar pump Solar pump
r čerpadloáloS2R
Coll. 2
Solar pump storage2
Transfer pump Secondary pump
R3 3-way valve 3-way valve 3-way valve

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Hydraulic variant 22
Solar + Solid fuel boiler
Hydraulic variant 23
Solar + cooling 1
Hydraulic variant 24
Solar + cooling 2
Hydraulic variant 25
Solar + cooling 3
Hydraulic variant 26
Solar + heat exch. +2-zone storage + valve
Hydraulic variant 27
Solar + heat exch. +2 storages + valve
S1 Collector Collector Collector Collector Collector Collector S2 Storage Storage Storage Storage
bottom
Storage top Storage1
S3 Storage2Storage bottomStorage topSolid fuel Boiler
S4 Heat exchanger Heat exchanger
S5 S6 VFS1
VFS2
R1 / V1
Solar pump Solar pump Solar pump Solar pump Solar pump Solar pump
R2 Solid fuel boiler
pump
Cooling pump Cooling pump Secondary
pump
Secondary pump
R3 3-way valveCooler 3-way valve

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Hydraulic variant 28
Solar+Valve for Pool+WT
Hydraulic variant 29
Solar + Solid fuel- Boiler + S4
Hydraulic variant 30
2x Solar
Hydraulic variant 31
Solar + Storage transfer + Thermostat
Hydraulic variant 32
Solar + return flow increase + thermostat
Hydraulic variant 33
Solar + 2. Collector + Valve + 2. Storage with Valve
S1 Collector Collector Collector1 Collector Collector Collector1 S2 Storage Storage dole Storage1 Storage1 bottom Storage bottom Storage1 S3 Pool Solid fuel boiler Storage2 Storage1 top Storage middle Storage1
Storage topReturnStorage topHeat exchanger4S
Collector2ThermostatThermostatCollector25S
S6 VFS1 VFS2 R1 / V1 Solar pump Solar pump Solar pump1 Solar pump Solar pump Solar pump
collector
3-way valve
ThermostatCharge pumpSolar pump2Boiler pump2R
R3 Secondary pump + Switching valve
Thermostat 3-way valve 3-way valvel

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Hydraulic variant 34
2 collectors with pump + 2 storages with valve
Hydraulic variant 35
Solar + valve + heat exch. + pool pump
Hydraulic variant 36
Solar + 3 storages with pumps
Hydraulic variant 37
Solar + 3 storages with valves
S1 Collector1 Collector Collector Collector
S2 Storage1 Storage Storage1 Storage1 S3 Storage2 Pool Storage2 Storage2
Heat exchanger4S
(secondary)
Storage3 Storage3
S5 Collector2 S6
VFS1
VFS2
R1 / V1 Solar pump1 Solar pump Solar pump1 Solar pump R2 Solar pump2 Secondary pump Solar pump2 3-way valve 1 (storage 1 R3 3-way valve 3-way valve Solar pump3 3-way valve 2 (storage 2
or storage 2/3)
or storage 3)

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E - Operation
E 1 - Display and input
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) and (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 confirma-
tion function.
Examples of key functions:
+/- = enlarge/shrink values
▼/▲= scroll menu down/up
yes/no = approve/reject
Info = additional information
Back = to previous screen
ok = confirm selection
Confirm = confirm setting
Examples of display symbols:
Pump (rotates in operation)
Valve (direction of flow black)
Collector
Storage tank
Swimming pool
Temperature sensor
Heat exchanger
load pause (see Load time)
Warning/error message
New information available
logging is active

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E 2 - Commissioning help
The first 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 commissioning
help or not. The commissioning help can also be ter-
minated or called up again at any time in the special
functions menu. The commissioning help guides you
through the necessary basic settings in the correct
order, and provides brief descriptions of each parame-
ter 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. 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 49)
- Menu 6.11 Time and date (page 48)
- Menu 6.1 Program selection (page 30)
- Menu 4 Settings, all values (page 25)
- Menu 5 Protective functions if modifications are necessary (page 28)
- Menu 6 Special functions if additional changes are necessary (page 30)
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 automa-
tic mode.
Observe the explanations for the individual parameters on the following pages, and check whether further
settings are necessary for your application.
Caution