Sunhome Tech SR1568 User manual

Operation Manual of Solar controller
SR1568 for split solar system
Version En 2015.08

Operation manual of solar controller SR1568
Page 1 of 87
Contents
1. Safety information.....................................................................................................................4
1.1 Installation and commissioning............................................................................................4
1.2 About this manual...................................................................................................................4
1.3 Liability waiver.........................................................................................................................4
1.4 Important information.............................................................................................................5
1.5 Signal description...................................................................................................................5
1.6 HMI button...............................................................................................................................5
2 Overview......................................................................................................................................6
2.1 Controller introduction............................................................................................................6
2.2 Delivery list ..............................................................................................................................6
2.3 Technical data.........................................................................................................................6
3. Installation..................................................................................................................................7
3.1 Mounting controller.................................................................................................................7
3.2 Wiring connection...................................................................................................................8
3.3 Terminal connection...............................................................................................................8
3.4 TF (MicroSD) Card...............................................................................................................11
4. System......................................................................................................................................13
4.1 Overview of the available systems....................................................................................13
4.2 Description of 23 systems...................................................................................................14
System 1: Standard solar system with 1 tank, 1 collector field...........................................15
System 2: Solar system with 1 tank, 1 collector field, 3-ways valve for tank loading in
layers.............................................................................................................................................16
System 3: Solar system with 1 tank, east/west collector fields...........................................17
System 4: Solar system with east/west collector fields, 3-ways valve for tank loading in
layers.............................................................................................................................................18
System 5: Solar system with east/west collector fields, 1 tank, valve-logic control ........19
System 6: Solar system with 1 collector field, 1 tank, loading the heating return............20
System 7: Solar system with 1 collector field, 1 tank, 3-ways valve loading tank in layers,
loading the heating return..........................................................................................................21
System 8: Solar system with east/west collector field, 1 tank, loading the heating return
........................................................................................................................................................22
System 9: Solar system with east/west collector fields, 1 tank, 3-ways valve switch
collector, loading the heating return.........................................................................................23

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System 10: Solar system with east/west collector fields, 1 tank, 3-ways valve loading
tank in layers, loading the heating return................................................................................24
System 11: Solar system with1 collector field, 2 tanks, 3-ways valve switch loading tank
........................................................................................................................................................25
System 12: Solar system with 1 collector field, 2 tanks, Pump switch loading tank........26
System 13: Solar system with east/west collector fields, 2 tanks, 3-ways valve switch
loading tank..................................................................................................................................27
System 14: Solar system with 1 collector field, 2 tanks, thermal energy transferring
between 2 tanks ..........................................................................................................................28
System 15: Solar system with 1 collector field, 2 tanks, valve switch loading tank,
thermal energy transferring between 2 tanks.........................................................................29
System 16: Solar system with 1 collector field, 1 tank, valve switch loading tank in layers,
thermal energy transferring between 2 tanks.........................................................................30
System 17: Solar system with 1 collector field, 2 tanks, pump switch loading tank,
thermal energy transferring between 2 tanks.........................................................................31
System 18: Solar system with east/west collector fields, 2 tanks, pump switch collector,
valve switch loading in layers, energy transferring between 2 tanks.................................32
System 19: Solar system with east/west collector fields, 2 tanks, thermal energy
transferring between 2 tanks.....................................................................................................33
System 20: Solar system with east/west collector fields, 2 tanks, valve switch loading
tank, thermal energy transferring between 2 tanks...............................................................34
System 21: Solar system with 1 collector field, 2 tanks, valve switch loading tank,
preheating return of heating system........................................................................................35
System 22: Solar system with 1 collector field, 2 tanks, pump switch loading tank,
preheating return of heating system........................................................................................36
System 23: Solar system with east/west collector fields, 2 tanks, valve switch loading
tank, preheating return of heating system ..............................................................................37
4.3 Commissioning .....................................................................................................................38
5. Functions and options............................................................................................................38
5.1 Overview of menu structure................................................................................................38
5.2 Channel description of adjustable menu..........................................................................39
5.3 Menu operation description................................................................................................50
5.4 Check value...........................................................................................................................50
5.5 Menu function........................................................................................................................50

Operation manual of solar controller SR1568
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6. Holiday function.......................................................................................................................77
7. Software of controller upgrade.............................................................................................78
8. Protection function..................................................................................................................80
8.1 Screen protection .................................................................................................................80
8.2 Trouble protection.................................................................................................................80
8.3 Trouble checking...................................................................................................................80
9. Quality Guarantee...................................................................................................................85
10. Accessories ...........................................................................................................................85

Operation manual of solar controller SR1568
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1. Safety information
1.1 Installation and commissioning
When laying wires, please ensure that no damage occurs to any of the constructional
fire safety measures presented in the building.
The controller must not be installed in rooms where easily inflammable gas mixtures are
present or may occur.
The permissible environmental conditions can’t be exceeded at the site of installation.
Before connecting the device, make sure that the energy supply matches the
specifications that controller requires.
All devices connected to the controller must conform to the technical specifications of
the controller.
All operations on an open controller are only to be conducted cleared from the power
supply. All safety regulations for working on the power supply are valid.
Connecting and /or all operations that require opening the collector (e.g. changing the
fuse) are only conducted by specialists.
1.2 About this manual
This manual describes the installation, functions and operation of a solar controller. When
installing the remaining components e.g. the solar collectors and the tank unit, please be
sure to observe the appropriate installation instructions provided by each manufacturer.
Installation, electrical connection, commissioning and maintenance of the device may only
be performed by trained professional person. The professional person must be familiar with
this manual and follow the instructions contained herein.
1.3 Liability waiver
The manufacturer can’t monitor the compliance with these instructions or the circumstances
and methods used for installation, operation, utilization and maintenance of this controller.
Improper installation can cause damages to material and person. This is the reason why we
do not take over responsibility and liability for losses, damages or cost that might arise due to
improper installation, operation or wrong utilization and maintenance or that occurs in some
connection with the aforementioned. Moreover we do not take over liability for patent
infringements or infringements –occurring in connection with the use of this controller on the
third parties rights. The manufacturer preserves the right to put changes to product, technical
data or installation and operation instructions without prior notice. As soon as it becomes
evident that safe operation is no longer possible (e.g. visible damage). Please immediate
take the device out of operation. Note: ensure that the device can’t be accidentally placed

Operation manual of solar controller SR1568
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into operation.
1.4 Important information
We have carefully checked the text and pictures of this manual and provided the best of our
knowledge and ideas, however inevitable errors maybe exist. Please note that we cannot
guarantee that this manual is given in the integrity of image and text, they are just some
examples, and they apply only to our own system. Incorrect, incomplete and erroneous
information and the resulting damage we do not take responsibility.
1.5 Signal description
Safety indication: Safety instructions in the text are marked with a warning triangle.
They indicate measures which can lead to injury of person or safety risks.
Operation steps: small triangle “►”is used to indicate operation step.
Notes: Contains important information about operation or functions.
1.6 HMI button
LED indicator lamp
Controller is operated with the 5 buttons besides the screen
“ " holiday button
“SET” button: confirm / selection
“↑” up button: increase the value
“↓” down button: reduce the value
“ESC" button return/ exit : return to previous menu
Note: TST is temperature of tank ( on screen)

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2 Overview
2.1 Controller introduction
TFT colorful screen display
6 * relay outputs
1 * low voltage relay output
7 * sensor inputs
1 * Grundfos Direct Sensor TM (VFS) simulation input
1 * Grundfos Direct Sensor TM (RPS) simulation input
3 * Variable frequency PWM outputs for the speed
control of the high efficiency pump
Data saved on the TF card (Micro SD)
485 communication port
23 systems for choose
2.2 Delivery list
1 * SR1568 controller
1 * accessory bag
1 * user manual
2 * screen and expansion
2 * PT1000 temperature sensor (φ6*50mm,cable length 1.5meter)
5 * NTC10K temperature sensor (φ6*50mm,cable length 3meter)
1 * clamp bag
2.3 Technical data
Input：2* PT1000 temperature sensors
5* NTC10K, B=3950 temperature sensors
1* Grundfos Direct Sensor TM (VFS type)
1* Grundfos Direct Sensor TM (RPS type)
Output：3* Electromagnetic relay, Max. current 1A
3* Semiconductor repay, Max. current 1A
1* Potential-free extra-low voltage relay (on/off signal)
3* PWM variable frequency output (switchable 0-10V)
Functions: operating hours counter, tube collector function, thermostat function, pump
speed control, heat quantity measurement, external heat exchange, adjustable system
parameters and optional functions (menu-driven), balance and diagnostics

Operation manual of solar controller SR1568
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Power supply : 100…240V ~(50…60Hz)
Rated impulse voltage:：2.5KV
Data interface : TF (Micro SD)
485 current supply：60mA
Housing：Plastic ABS
Mounting：Wall mounting
Indication / Display: System-Monitoring-Display, for visualization of the systems, TFT
colorful display, and background illumination
Operation: 5 push buttons at the front cover
Protection type: IP41
Protection class: I
Ambient temperature: 0 ... 40 °C
Degree of pollution: 2
Dimensions: 208*158*43mm
Note: TF (Micro SD) isn’t included in the delivery list
3. Installation
Note: The unit must only be located in the dry interior rooms. Please separate
routing of sensor wires and mains wires. Make sure the controller as well as the system is
not exposed to strong electromagnetic fields.
3.1 Mounting controller
Follow the below steps to mount the controller on the wall.
Unscrew the crosshead screw from the cover and
remove it along with the cover from the housing.
Mark the upper fastening point on the wall. Drill and
fasten the enclosed wall plug and screw leaving the
head protruding.
Hang the housing from the upper fastening point and
mark the lower fastening points (centers 180 mm).
Drill and insert lower wall plugs.
Fasten the housing to the wall with the lower fastening
screw and tighten.
Carry out the electrical wiring in accordance with the terminal allocation

Operation manual of solar controller SR1568
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Put the cover on the housing. Attach with the fastening screw.
3.2 Wiring connection
According to the way of installation, wire can be connected from hole Aon the bottom plate or
from hole B, using a suitable tool (like knife) to cut the plastic of A.
Note: wires must be fastened by fixing clamps on position C.
3.3 Terminal connection
Note: before opening the housing! Always disconnect the controller from power
supply and obey the local electrical supply regulation.
Input terminals
T0～T1：PT1000 temperature sensor, for measuring the temperature of collector and

Operation manual of solar controller SR1568
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thermal energy calculation.
T2～T6: NTC10K，B=3950 temperature sensor, for measuring temperature of tank and
pipe.
Communication port 485：ELA485, for remote control communication
HK-A, HK-B：Dry connection on/off signal ports, (HK and HR simultaneously open or close,
for boiler heating control)
IPWM1, IPWM2, IPWM3：Signal ports for high efficiency pump, detailed connection see
below
RPS：For Grundfos pressure sensor
VFS：For Grundfos flowmeter sensor
Advice regarding the installation of temperature sensors:
①Only original factory equipped Pt1000 temperature sensors are approved for using with
the collector, it is equipped with 1.5m silicon cable and suitable for all weather
conditions, the cable is temperature resistant up to 280oC, connect the temperature
sensors to the corresponding terminals with either polarity.
②Only original factory equipped NTC10K,B=3950 temperature sensors are approved for
using with tank and pipe, it is equipped with 3m PVC cable, and the cable is
temperature resistant up to 105oC, connect the temperature sensors to the
corresponding terminals with either polarity.
③All sensor cables carry low voltage, and to avoid inductive effects, must not be laid close
to 230 volt or 400 volt cables (minimum separation of 100mm).
④If external inductive effects are existed, e.g. from heavy current cables, overhead train
cables, transformer substations, radio and television devices, amateur radio stations,
microwave devices etc., then the cables to the sensors must be adequately shielded.
⑤Sensor cables may be extended to a maximum length of ca. 100 meter, when cable’s
length is up to 50m, and then 0.75mm2cable should be used. When cable’s length is up
to 100m, and then 1.5mm2cables should be used.

Operation manual of solar controller SR1568
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Output terminal
Input Ports L N: for power connection, L: live wire, N: zero wire, protective wire
Output R1：Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A
Output R2：Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A
Output R3：Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A
Output R4: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output R5: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output HR: Electromagnetic relays, designed for on/off control of back-up heating device,
Max. Current: 1A
R4, R5 terminals for 3-ways valve / pump connection
Valve with 3 wires Valve with 2 wires
Pump connection

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R4～R5: When it is for control 3 ways electromagnetic valve,（3 is normally close port, 2 is
normally on port ,1 is common port）
When it is for control pump, (2 is normally on port, 1 is common port)
Connection with high efficiency pump
Connecting the signal wire from the high-efficiency pump
Signal wire 1 from the high-efficiency pump is connected to GND port of controller
Signal wire 2 from the high-efficiency pump is connected to PWM1 port of controller
Signal wire 3 from the high-efficiency pump is connected to FB1 port of controller or not
connected
Note: High-efficiency pump with 0-10V signal only has 2 signal wires, connected to
the corresponding port GND, PWM1 of controller.
3.4 TF (MicroSD) Card
Controller is equipped with a slot for TF (Micro SD) card. With TF (MicroSD) card, following
functions can be carried out:
Save the measurement and balance values onto the MicroSD card. After transferring

Operation manual of solar controller SR1568
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the data to a computer, the values can be opened and visualized, e. g. in a spreadsheet.
Prepare adjustments and parameterizations on a computer and transfer them via the
MicroSD card to the controller.
Save adjustments and parameterizations on the MicroSD card and, if necessary,
retrieve them from there.
Copy the updated firmware and install them on the controller via MicroSD card.
TF（MicroSD）card slot
Note: TF (MicroSD) card is not listed in the standard delivery package, self-purchase
if need, more detailed about TF (MicroSD) see paragraph 5.3.1

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4. System
4.1 Overview of the available systems

Operation manual of solar controller SR1568
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4.2 Description of 23 systems
Note: auxiliary functions introduction!
The system diagrams showed in this manual are used for normal solar hot water system
design, for individual application, some very useful auxiliary functions are available in this
controller, it makes the controller more intelligent and user friendly.
We provide these auxiliary functions “CIRC, OHDP, BYPR, TIMER, OPARR”, with every
system diagram, there is a free definition sensor and rest output relay (it means free output in
the selected system), customer can define this sensor and output according individual
specified system, if the corresponding input or output is defined, it is no longer to be able to
use as other function.
Auxiliary functions should be activated firstly under the relevant menu.

Operation manual of solar controller SR1568
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System 1: Standard solar system with 1 tank, 1 collector field
Description:
The controller calculates the temperature
difference between collector sensor T1 and
tank sensor T2. If the difference is larger
than or identical to the adjusted switch-on
temperature difference, the solar circulation
pump (R1) will be switched on and the tank
will be loaded until the switch-off temperature
difference or the maximum tank temperature
is reached.
Sensor
ports
Description
Relay
outputs
Description
T0
Selectable sensor, free
R1
Solar circulation pump
T1
Temperature of collector
R2
Available selectable functions:
1.CIRC（DHW circulation）
2.OHDP（Thermal transfer）
3.SFB（Solid fuel boiler）
4.BYPR（Circulation by-pass）
5.TIMER（Timer function）
6.OPARR（Parallel relay）
T2
Temperature of tank base
R3
T3
Temperature of tank upper
( selectable)
R4
T4
Selectable sensor, free
R5
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)

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System 2: Solar system with 1 tank, 1 collector field, 3-ways valve for tank loading in
layers
Description:
The controller calculates the temperature
difference between collector sensor T1 and
tank base and upper sensor T2, T3. If the
difference is larger than or identical to the
adjusted switch-on temperature difference, the
solar circulation pump (R1) will be switched on,
and simultaneously valve R4 turns to the
corresponding tank zone and this zone will be
loaded until the switch-off temperature
difference or the maximum tank temperature is
reached.
The priority logic effects prior loading of the
upper zone of the tank
Sensor
ports
Description
Relay
outputs
Description
T0
Selectable sensor, free
R1
Solar circulation pump
T1
Temperature of collector
R4
3-ways valve for loading in layers
T2
Temperature of tank base
R2
Available selectable functions:
1.CIRC（DHW circulation）
2.OHDP（Thermal transfer）
3.SFB（Solid fuel boiler）
4.BYPR （Circulation by-pass ）
5.TIMER（Timer function）
6.OPARR（Parallel relay）
T3
Temperature of tank upper
R3
T4
Selectable sensor, free
R5
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)

Operation manual of solar controller SR1568
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System 3: Solar system with 1 tank, east/west collector fields
Description:
The controller calculates the temperature
difference between collector sensor T1, T0 and
tank base sensor T2. If one of the differences is
larger than or identical to the adjusted
switch-on temperature difference, then the
corresponding solar circulation pump (R1 and
/or R2) will be switched on, tank will be loaded
until the switch-off temperature difference or
the maximum tank temperature is reached.
Sensor
ports
Description
Relay
outputs
Description
T0
Temperature of collector 2
R1
Solar circulation pump 1
T1
Temperature of collector 1
R2
Solar circulation pump 2
T2
Temperature of tank base
R3
Available selectable functions:
1.CIRC（DHW circulation）
2.OHDP（Thermal transfer）
3.SFB（Solid fuel boiler）
4.BYPR （Circulation by-pass ）
5.TIMER（Timer function）
6.OPARR（Parallel relay）
T3
Temperature of tank upper
(selectable)
R4
T4
Selectable sensor, free
R5
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)

Operation manual of solar controller SR1568
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System 4: Solar system with east/west collector fields, 3-ways valve for tank loading
in layers
Description:
The controller calculates the temperature
difference between collector sensor T1, T0 and
tank base, upper sensor T2, T3. If any difference
is larger than or identical to the adjusted
switch-on temperature difference, then the
corresponding solar circulation pump (R1 and /or
R2) will be switched on, and simultaneously
valve R4 turns to the corresponding tank zone
and this zone will be loaded until the switch-off
temperature difference or the maximum tank
temperature is reached.
The priority logic effects prior loading of the
upper zone of the tank
Sensor
ports
Description
Relay
outputs
Description
T0
Temperature of collector 2
R1
Solar circulation pump 1
T1
Temperature of collector 1
R2
Solar circulation pump 2
T2
Temperature of tank base
R4
3-ways valve for loading in layers
T3
Temperature of tank upper
R3
Available selectable functions:
1.CIRC（DHW circulation）
2.OHDP（Thermal transfer）
3.SFB（Solid fuel boiler）
4.BYPR （Circulation by-pass ）
5.TIMER（Timer function）
6.OPARR（Parallel relay）
T4
Selectable sensor, free
R5
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)

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System 5: Solar system with east/west collector fields, 1 tank, valve-logic control
Description:
The controller calculates the temperature
difference between collector sensor T1, T0
and tank base sensor T2. If any difference is
larger than or identical to the adjusted
switch-on temperature difference, then solar
circulation pump (R1) will be switched on,
and simultaneously valve R4 turns to the
corresponding collector and tank will be
loaded until the switch-off temperature
difference or the maximum tank temperature
is reached.
Sensor
ports
Description
Relay
outputs
Description
T0
Temperature of collector 2
R1
Solar circulation pump
T1
Temperature of collector 1
R4
3-ways valve for collector switch
T2
Temperature of tank base
R2
Available selectable functions:
1.CIRC（DHW circulation）
2.OHDP（Thermal transfer）
3.SFB（Solid fuel boiler）
4.BYPR （Circulation by-pass ）
5.TIMER（Timer function）
6.OPARR（Parallel relay）
T3
Temperature of tank upper
(selectable)
R3
T4
Selectable sensor, free
R5
T5
Selectable sensor, free
HR
Back-up heating
T6
Temperature for thermal
energy measurement
( selectable)