Shuang Ri SR258 User manual

·
Operation Manual of the Intelligent
Controller SR258
for Split Pressurized Solar Hot Water System
Please read the instruction carefully before operation!

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Contents
1. Safety information................................................................................................. 3
1.1 Installation and commissioning ............................................................................... 3
1.2 About this manual................................................................................................... 3
1.3 Liability waiver........................................................................................................ 3
1.4 Important information.............................................................................................. 4
1.5 Signal description................................................................................................... 4
1.6 Button and HMI description..................................................................................... 4
2. Overview.................................................................................................................. 5
2.1 Technical data........................................................................................................ 5
2.2 Delivery list............................................................................................................. 6
3. Installation................................................................................................................ 6
3.1 Mounting controller................................................................................................. 6
3.2 Wiring connection................................................................................................... 7
3.3 Terminal connection................................................................................................ 7
3.3.1 Electrical heating 1500W version terminal ports and wring................................... 7
3.3.1 Electrical heating 3000W version terminal ports and wring................................... 8
3.4 Connection with high efficiency pump................................................................... 10
4. System description (Standard solar system with 1 tank, 1 collector field).................11
5. Function’s parameters and options ......................................................................... 12
5.1 Overview of menu structure.................................................................................. 12
5.2 Menu operation description................................................................................... 12
5.3 Value checking..................................................................................................... 13
6. Functions operation and parameters setting (for user)............................................ 14
6.1 CLK Time setup.................................................................................................... 14
6.2 THET Timing heating............................................................................................ 14
6.3 CIRC DHWcircuit pump controlled by temperature in three time - sections / flow
switcher...................................................................................................................... 17
7. Function operation and parameter setup (engineer)................................................ 23
7.1PWD Password ..................................................................................................... 23
7.2 LOAD tank heating............................................................................................... 23
7.3 COL Collector function.......................................................................................... 26
7.4 PUMP Pump R1 control mode.............................................................................. 31

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7.5 COOL Cooling function......................................................................................... 34
7.6 AUXAuxiliary function........................................................................................... 38
7.7 MAN Manual operation......................................................................................... 42
7.8 BLPR Blocking protection..................................................................................... 43
7.9 OTDI Thermal Disinfection function ...................................................................... 43
7.10 FSFlowrate monitoring and pump dry running protection .................................. 45
7.11 UNIT C-F Switch................................................................................................. 46
7.12 RET Reset.......................................................................................................... 46
7.13 PASS Password setup........................................................................................ 47
7.14M.H Manual heating ............................................................................................ 48
7.15 Holiday function.................................................................................................. 48
8. Protection function.................................................................................................. 49
8.1 Memory function during power failure................................................................... 49
8.2 Screen protection................................................................................................. 49
8.3 Trouble checking.................................................................................................. 49
9. Quality Guarantee.................................................................................................. 50
10. Accessories.......................................................................................................... 51

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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 the controller requires.
All devices connected to the controller must be conformed 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 mounting, functions and operation of a solar controller used for a
solar hot water system, for mounting of other devices of a completed solar hot water system
like solar collector, pump station and storage, please is sure to observe the appropriate
installation instructions provided by each manufacturer. Mounting, wire connecting,
commissioning and maintenance of this controller may only be performed by the trained
professional person; the professional person should be familiar with this manual and follow
the instructions contained herein.
1.3 Liability waiver
The manufacturer can’t monitor the compliance with thes e 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 the 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

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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
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, incorrect, incomplete
and erroneous information and the resulting damage we do not take responsibility.
1.5 Signal description
Safety indication: Safety indications 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.
Note: Contains important information about operation or functions.
1.6 Button and HMI description
Controller is operated with the 6 buttons on the right side of the screen
“ " holiday button
“M.H” button: manual heating
“SET” button: confirm / selection
“▲” up button: increase the value
“▼” down button: reduce the value
“ESC" button return/ exit : return to previous menu

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Status description
Code
Lighting
Blinking
Exceed the maximum temperature of storage
SMX
Running of storage emergency shutdown
function
Running of collector emergency shutdown
function
CEM
+
Collector Cooling
OCCO
Tank Cooling
OSTC
System Cooling
OSYC
Start of anti-freezing function
OCFR
Running of anti-freezing function
OCFR
Collector minimum temperature
OCMI
Slow blink
2. Overview
2.1 Technical data
Inputs: 1 * PT1000 temperature sensor input
4 * NTC10K, B=3950 temperature sensor input
1 * FRT rotary vane type electronic flow meter
Outputs: 2* Electromagnetic relay(R2/R3), maximum current 1A
1* Semiconductor relay(R1), maximum current 1A
1* Electromagnetic relay(HR), maximum current 10A/15A
1 * PWM variable frequency output (on/off switchable, 0-10V)
Functions: operating hours counter, tube collector function, thermostat function, pump
speed control, external heat exchange, adjustable system parameters and optional
functions (menu-driven), balance and diagnostics
Power supply: 100…240V ~(50…60Hz)
Rated impulse voltage: 2.5KV
Housing：Plastic ABS
Mounting：Wall mounting
Operation: 6 push buttons at the front cover
Protection type: IP41
Ambient temperature: 0...40 °C
Dimensions: 187*128*46mm
Note: there are 4 inputs for NTC10K, B=3950 temperature sensor, but only 2 sensors

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are included in standard delivery list, the other two should be purchased separately by
customer if necessary.
2.2 Delivery list
SR258 1500W version
Delivery list
SR258 3000W version
Delivery list
1 * SR258 controller
1 * SR258 controller
1 * Accessory bag
1 * Accessory bag
1 * User manual
1 * User manual
1 * PT1000 temperature sensor
(φ6*50mm,cable length 1.5meter)
1 * PT1000 temperature sensor
(φ6*50mm,cable length 1.5meter)
2 * NTC10K temperature sensor
(φ6*50mm,cable length 3meter)
2 * NTC10K temperature sensor
(φ6*50mm,cable length 3meter)
1* Power cord
No power cord delivery
(please prepare 2.5mm2 wiring
directly)
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 ①on 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 ②.
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

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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 A on the bottom plate
or from hole B, using a suitable tool (like knife) to cut the plastic ofA.
Note: wires must be fastened by fixing clamps on the position C.
3.3 Terminal connection
3.3.1 Electrical heating 1500W version terminal ports and wring
Note: before opening the housing! Always disconnect the controller from power
supply and obey the local electrical supply regulation.
Input ports
T1: PT1000 temperature sensor, for measuring the temperature of collector and thermal
energy calculation.
T2 ~T5: NTC10K, B=3950 temperature sensor, for measuring temperature of tank and
pipe.
PWM1: Signal ports for high efficiency pump, detailed connection see below
FRT: For rotary vane type electronic flowmeter.

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Output ports
FU1：2A/250V fuse
10A power supply 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: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output R3: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output (1500W) HR: Electromagnetic relays, designed for on/off control of after
heating/thermostat function, Max. Current: 10A
1).When power supply AC230V output HR is 1500W.
2).When power supply AC110V output HR is 750W.
3.3.1 Electrical heating 3000W version terminal ports and wring
Input ports
T1: PT1000 temperature sensor, for measuring the temperature of collector and thermal
energy calculation.
T2 ~T5: NTC10K, B=3950 temperature sensor, for measuring temperature of tank and
pipe.
PWM1: Signal ports for high efficiency pump, detailed connection see below
FRT: For rotary vane type electronic flowmeter.
Output ports
15A power supply Ports L, N: for power connection, L: live wire, N: zero wire,

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protective wire
Output R1: Semiconductor relays (SCR), designed for pump speed control, Max.
Current: 1A
Output R2: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output R3: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output (3000W) HR: Electromagnetic relays, designed for on/off control of after
heating/thermostat function, Max. Current: 15A
1).When power supply AC230V output HR is 3000W.
2).When power supply AC110V output HR is 1500W.
Advice regarding the installation of temperature sensors:
Only original factory equipped Pt1000 temperature sensors are approved for using with
the controller, 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.
Only 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.
All 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).
If 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.
Sensor 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.

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3.4 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 PWM port of controller
Signal wire 3 from the high-efficiency pump is not connected to the controller
Some pumps connections are available as above, for example:
Wilo Yonos PARA ST15/7.0 PWM2 M
Grundfos UPM3 SOLAR 15-75 130 CZA
Note:
1. High-efficiency pump with 0-10V signal only has 2 signal wires, connected to the
corresponding port GND, PWM1 of controller.
2. Blue wire not always represent for “GND”and brown wire not always represent for
“PWM”.
”PWM”from pump must be match for “PWM”from controller.
”GND”from pump must be match for “GND”from controller.

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4. System description (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
Description
Relay
Description
T1
Temperature of collector Pt1000
R1
Solar circulation pump
T2
Temperature of tank base NTC10K
HR
Back up heating
T3
Temperature of tank upper
( selectable) NTC10K
Auxiliary function
Code
Des cription
Object sensor
Object rela ys
CI RC
DHW circulation (controlled by
temperature or flow impulse)
T4/flow switcher
(connected on T4
port)
R2
OHDP
Thermal transfer -by external radiator
R2/R3( selectable)
TIME
Timer functi on
R3
AH
Thermostat function
T2/T3/T5( selectable)
R3
Note:
Sometime, for one selected function, it needs an extra input to connect temperature sensor
or an extra output to control pump or electromagnetic valve, in the case all inputs and
outputs are in using, and then this selected function will not be triggered even when you have
activated it. Controller can distinguish it automatically and switch-off this function.
1. When one of these functions (TIME, AH) is activated, and then the other one will be

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deactivated automatically.
2. After CIRC function is activated, if OHDP function is activated also and R2 output is
selected for it, and then CIRC will be deactivated automatically.
5. Function’ s parameters and options
5.1 Overview of menu structure
5.2 Menu operation description
Access main menu
►Press “SET” button to access main menu

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►Press “▲/▼” to select menu
►Press “SET” button to enter the submenu
Access submenu
►After selecting main menu, then press “SET” button to access submenu
►Press “▲/▼” button to select submenu,
►Press “SET” button to enter the value adjust interface or selection function (select
ON/OFF)
►Press “▲/▼” to adjust value
►Press “SET” or ”ESC”to confirm the value you set
►Press “ESC” to exit the submenu
Note: Enter the menu adjustment interface, if you don’t press any button in 3 minutes,
screen will exit the adjustment and return to the main interface.
5.3 Value checking
At the normal operation mode, press “▲/▼” button, you can view the temperature of
collector and tank, pump speed(n1%), flow rate(L/M), countdown time of disinfection function,
auxiliary function. The controller operation time(DAYS),and firmware version(SW).
Note:
1. For the countdown time of disinfection, auxiliary function, you can only check them when
the function is activated in the parameter menus.
2. At the value check interface, if you don’t press any button within 3 minutes, screen will exit
the check interface and return to the main interface.

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6. Functions operation and parameters setting (for user)
6.1 CLK Time setup
Menu structure
►Press “SET” button, select CLK menu
►Press “SET” button, hour “00” blinks on the display.
►Press “▲/▼” button to adjust hour
►Press “SET” button, minute time “00” blinks on the display
►Press “▲/▼” button to adjust minute
►Press “SET” or “ESC” button to save the set value
Note: In the case power to controller is switched-off, date and time will be remembered
in controller for 36 hours.
6.2 THET Timing heating
Electrical back-up heater, gas boiler or oil boiler can be installed in the solar system to
ensure the tank’s temperature meets the required temperature, this electrical heater can be
controlled automatically by this controller, when tank temperature T3 drops below the
switch-on set point of this function, electrical heater HR is triggered to heat tank up to the
switch-off temperature, and then electrical heater HR stops working.
Note：the reference sensor T3 or T2 of this function can be selected in parameter
THTS.
It is possible to set three time sections for activating this function,
Factory default set:
The first time section: heating starts at 4:00am, stops at 5:00am, and switch on
temperature is set at 40oC, switch-off temperature is set at 50oC
The second time section: heating starts at 10:00am, stops at 10:00am
The third time section: heating starts at 17:00am, stops at 22:00am, and switch on
temperature is set at 50oC, switch-off temperature is set at 55oC
If you want to shut off one timing heating ,then you can set the turning on time and turning off

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time with a same value(for example, set second start time tA2 O at 10:00 and set the stop
time tA2 F at 10:00)
Every day three timing heating can be set, and the switch-on temperature adjustable range is
0℃～(OFF-2 oC), switch-off temperature adjustable range is (ON+2 oC) ～95 oC.
Intelligent heating mode
In the case the solar irradiation isn’t enough to heat the tank, in order to ensure the tank
temperature meets the requirement, controller will check the temperature of tank at the
specified time, if temperature doesn’t rise to the required value, and controller will trigger the
electrical heater to heat tank until its temperature rises up to the default switch-off
temperature.
Default set (not adjustable):
The first time: starts heating at 13:00 until temperature of 30 oC.
The second time: starts heating at 14:00 until temperature of 35 oC.
The third time: starts heating at 15:00 until temperature of 40 oC.
The forth time: starts heating at 16:00 until temperature of 45 oC.
The fifth time: starts heating at 17:00 until temperature of 50 oC.
Note: If customer use electrical heater as back-up, please according to the power of
electrical heater to equip corresponding safety devices like contactor and breaker with this
controller, we strongly recommend equipping with SR802 device with this controller, (SR802
detailed technical data see item 10 Accessories)
Menu structure
Main
menu
Submenu
Factory
set
Adjustable
range
Step per
adjust
Description
THET
Timing heating
THTS
S2
S2. S3
Select desired sensor for
timing heating function
(S3 for T3, S2 for T2)
SMT
ON
ON/OFF
Intelligent timing heating

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tH1O
04:00 /40℃
00:00-23:59/0 ℃
～(OFF-2℃)
0.5℃
Switch-on time and
temperature of the first
timing heating
tH1F
05:00/50℃
00:00-23:59/(ON+
2℃) ～95℃
0.5℃
Switch-off time and
temperature of the first
timing heating
t H2O
10:00/40℃
00:00-23:59/0 ℃
～(OFF-2℃)
0.5℃
Switch-on time and
temperature of the second
timing heating
tH2F
10:00/50℃
00:00-23:59/(ON+
2℃) ～95℃
0.5℃
Switch-off time and
temperature of the second
timing heating
tH3O
17:00/50℃
00:00-23:59/0 ℃
～(OFF-2℃)
0.5℃
Switch-on time and
temperature of the third
timing heating
tH3F
22:00/55℃
00:00-23:59/(ON+
2℃) ～95℃
0.5℃
Switch-off time and
temperature of the third
timing heating
Function setting:
►Press “SE T” button to access main menu, and press “▲” to select
THEH timing heating main menu.
►Press “SET” button to set parameter, select the reference sensor
of tank, “THS S2” displays on the screen.
►Press “SET” button, “S2”blinks
►Press “▲/▼” button to select desired sensor (S3 for T3, S2 for T2)
►Press “SET” or “ESC” button to save the setting.
►Press “▲” button, to access intelligent heating mode, “SMT OFF”
displays on the screen
►Press “SET” button, “OFF” blinks
►Press “▲/▼” button to activate this function.
►Press “▲” button to set start time of the first time section, “tH1O 04:00” displays on the
screen
►Press “SET” button, hour time “04” blinks
►Press “▲/▼” button to adjust hour of the switch-on time
►Press “SET” button, minute time “00” blinks
►Press “▲/▼” button to adjust minute of the switch-on time
►Press “SET” button, to set the switch on temperature, “40oC” blinks
►Press “▲/▼” button to adjust the switch-on temperature.
►Press “SET” or “ESC” button to save the setting.

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►Press “▲” button to set stop time of the first time section, “tH1F 05:00” displays on the
screen
►Press “SET” button, hour time “05” blinks
►Press “▲/▼” button to adjust hour of the switch-off time
►Press “SET” button, minute time “00” blinks
►Press “▲/▼” button to adjust minute of the switch-off time
►Press “SET” button, to set the switch off temperature, “45oC” blinks
►Press “▲/▼” button to adjust the switch-off temperature.
►Press “SET” or “ESC” button to save the setting.
►Press “▲” button to access the window of the switch-on time of the second time section,
repeat above steps to set time and temperature for the second and third time section.
When heating sign blinks on the screen, it indicates that timing-heating function is
activated.
Note:
The Sign represents whether timing heating function is on or off.
1. Within the preset time section, heating sign is lighted on the screen
2. Out of the preset time section, heating sign doesn’t display on the screen.
6.3 CIRC DHWcircuit pump controlled by temperature in three time - sections / flow
switcher
Function description:
This function is designed to get warm water quickly when customer open the stopcock. In the
case stopcock is closed, hot water pipe is also used as the circuit pipe. Two hot water circuit
supply modes are available, temperature controlled mode and flow switcher controlled mode.
For using this function, an extra circuit pump R2 or a flow switcher or a temperature sensor
(mounted on the hot water return pipe (T4)) should be installed in the system.
2 control mode of DHW circuit pump are designed in this controller: temperature control in
three time sections and flow switch control in three time sections.
Note:
1. for 2 DHW circuit pump control modes, only one mode can be selected.
2. for 2 DHW control modes, three time - sections/temperature control mode and three time -

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sections /flow switcher control mode, their parameter adjust steps of two control mode are
same.
Three time - sections/ temperature control mode (tEP)
Within the time - section (default: DHW temperature is less than 40oC, DHW circuit pump is
trigger, when temperature rises to 45oC, DHW circuit pump is stopped).
Trigger on conditions of temperature controlled DHW circuit pump (STAT):
when tank temperature (T2 or T3, T3 is prior control) is 2oC higher than the
preset switch-off temperature (CYCF) of this function, DHW pump just can
be triggered.
Default time - section set:
 The first time - section: start at 05:00 and stops at 07:00a.m
 The second time - section: starts at 11:00 and stops at 13:00
 The third time - section: starts at 17:00 and stops at 22:00 p.m.
Note: if this sensor is necessary to be installed in the system, in order to avoid the
measure error, please ensure its position is 1.5m far to the tank.
Three time - sections/ flow switcher control mode FS
Function description:
Open the stopcock, water flows through pipe, a flow signal is felt by a flow switcher which is
mounted on the cold-water pipe and sent to the controller, and then controller will trigger the
DHW circuit pump (R2) and it pumps hot water from tank to the circuit pipe. The running time
of circuit pump is adjustable, when the preset time runs out,
pump stops.
This stopcock seems like a remote controller to control the
running of circuit pump. This operation mode is an
environment-friendly, energy-saving control solution.
Open the stopcock for a shortly time, the flow switcher which is
mounted on the cold flow pipe of tank will feel the flow signal,
and then controller will trigger the circuit pump R2, and pump
will feed hot water from tank to the pipe. Then when you re-open
the stopcock, hot water flows out immediately. Once the pump’s running time finishes, then
pump is stopped. When hot water is not used, to avoid the heat releasing through pipe due to
the running of circuit pump, controller will stop the pump after the pre-set running time. To
avoid the pump being re-triggered just after it stopped, parameter “rest time” is used for this
control.
Open the stopcock within a pre-set time - section, pump running as the default design: pump
running for every three minutes and then rest for 15minutes (the adjustable range of the
running time is 1-30 MIN and the rest time is 0-60MIN

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Note:
Installed a check valve on the inlet pipe of circuit pump to avoid the water which
is from tank mixing with water from circuit pipe.
If the stop time is set with value 0 minute, then when flow switcher feels the flow
and thus to trigger the pump, pump will run for the whole time - section. And when the
stopcock is closed, pump is stopped automatically.
Default time - section set:
 The first time - section: start at 05:00 and stops at 07:00a.m
 The second time - section: starts at 11:00 and stops at 13:00
 The third time - section: starts at 17:00 and stops at 22:00 p.m.
Flow switch fitting:
Material of fitting: brass
House: plastic
Connection: G3/4
Reed of flow switch: Max 300V DC/1A
Note:
1. Note the flow direction indicated on the flow switch!
2. Lead the wires from flow switcher to input ports of controller, no polarity required.
3. Flow switch is not included in the delivery list of this controller, please buy it
separately.
Note:
1. Three time - sections/ flow switcher control mode, only one of two modes is available
in same time. It’s impossible activate the two modes at the same time.
2.If this sensor is necessary to be installed in the system, in order to avoid the measure
error, please ensure its position is 1.5m far to the tank
3. three time - sections/temperature control mode and three time - sections /flow switcher
control mode, their parameter adjust steps of two control mode are same