Shuangri electron Sr258 User manual

Operation Manual of the Intelligent

Controller SR258

for Split Pressurized Solar Hot Water System

Please read the instruction carefully before operation!

Manual of SR258 intelligent controller

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...................................................................................................................6

3.3 Terminal connection...............................................................................................................7

3.4 Connection with high efficiency pump ................................................................................8

4. System description (Standard solar system with 1 tank, 1 collector field)....................10

5. Function’s parameters and options .....................................................................................11

5.1 Overview of menu structure................................................................................................11

5.2 Menu operation description................................................................................................11

5.3 Value checking......................................................................................................................12

6. Functions operation and parameters setting (for user)....................................................12

6.1 CLK Time setup....................................................................................................................12

6.2 THET Timing heating ...........................................................................................................13

6.3 CIRC DHW circulation pump controlled by temperature or by time............................16

7. Function operation and parameter setup (engineer)........................................................20

7.1PWD Password......................................................................................................................20

7.2 LOAD tank heating...............................................................................................................21

7.3 COL Collector function.........................................................................................................23

7.4 PUMP Pump R1 control mode...........................................................................................29

7.5 COOL Cooling function........................................................................................................31

7.6 AUX Auxiliary function..........................................................................................................35

7.7 MAN Manual operation........................................................................................................39

Manual of SR258 intelligent controller

7.8 BLPR Blocking protection...................................................................................................40

7.9 OTDI Thermal Disinfection function..................................................................................41

7.10 FS Flow rate monitoring and pump dry running protection.........................................42

7.11 UNIT C-F Switch.................................................................................................................43

7.12 RET Reset...........................................................................................................................44

7.13 PASS Password setup ......................................................................................................44

7.14M.H Manual heating............................................................................................................45

7.15 Holiday function..................................................................................................................45

8. Protection function..................................................................................................................46

8.1 Memory function during power failure...............................................................................46

8.2 Screen protection .................................................................................................................46

8.3 Trouble checking...................................................................................................................46

9. Quality Guarantee...................................................................................................................47

10. Accessories ...........................................................................................................................48

Manual of SR258 intelligent controller

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 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 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

Manual of SR258 intelligent controller

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

Manual of SR258 intelligent controller

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 2A

1* Semiconductor relay(R1), maximum current 1A

1* Electromagnetic relay(HR), maximum current 10A

Note:

a).110VAC main supply: max.power 750W

b).230VAC main supply: max.power 1500W

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

Manual of SR258 intelligent controller

Ambient temperature: 0 ... 40 °C

Dimensions: 187*128*46mm

Note: there are 4 inputs for NTC10K, B=3950 temperature sensor, but only 2 sensors

are included in standard delivery list, the other two should be purchased separately by

customer if necessary.

2.2 Delivery list

1 * SR258 controller

1 * Accessory bag

1 * User manual

1 * PT1000 temperature sensor (φ6*50mm,cable length 1.5meter)

2 * NTC10K temperature sensor (φ6*50mm,cable length 3meter)

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

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.

Manual of SR258 intelligent controller

Note: wires must be fastened by fixing clamps on the 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 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.

PWM: Signal ports for high efficiency pump, detailed connection see below

FRT: For rotary vane type electronic flowmeter

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.

Manual of SR258 intelligent controller

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.

Output ports

FU1：2A/250V fuse

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: 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: 2A

Output HR: Electromagnetic relays, designed for on/off control of after

heating/thermostat function, Max. Current: 10A

3.4 Connection with high efficiency pump

Connecting the signal wire from the high-efficiency pump

Manual of SR258 intelligent controller

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.

Manual of SR258 intelligent controller

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

Temperature of collector Pt1000

Solar circulation pump

Temperature of tank base NTC10K

Available selectable functions:

1.CIRC（DHW circulation）

2.OHDP（Thermal transfer,R2 or R3

selectable）

Temperature of tank upper

( selectable) NTC10K

DHW sensor, NTC10K

1. TIME (timer function)

1. AH （thermostat function）

Selectable sensor, free NTC10K

Back-up heating/

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

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.

Manual of SR258 intelligent controller

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

►Press “▲/▼” to select menu

►Press “SET” button to enter the submenu

Access submenu

►After selecting main menu, then press “SET” button to access submenu

Manual of SR258 intelligent controller

►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.

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

Manual of SR258 intelligent controller

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 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

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.

Manual of SR258 intelligent controller

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

Submenu

Factory

set

Adjustable

range

Step per

adjust

Description

THET

Timing heating

THTS

S2. S3

Select desired sensor for

timing heating function

(S3 for T3, S2 for T2)

SMT

Intelligent timing heating

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

Manual of SR258 intelligent controller

Function setting:

►Press “SET” 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 S3” displays on the screen.

►Press “SET” button, “S3” 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.

►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.

Manual of SR258 intelligent controller

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 DHW circulation pump controlled by temperature or by time

Function description:

This controller provides an output for running DHW circulation pump, which can be controlled

by a temperature, at this case, an extra circuit pump (connect to the output R2 option) and an

extra temperature sensor installed on the hot water return pipe (connect to the input T4)

should be installed in the system. When the temperature of DHW return is lower than the

preset switch-on temperature, circuit pump is triggered, until temperature rises up to the

switch-off temperature, pump is stopped.

2 controlling modes are designed for running DHW circulation pump.

Time controlled DHW pump within the preset 3 time sections (default Mode)

Within the preset time section, when running of the DHW circulation pump R2 is controlled by

time, at this case, pump is triggered by time, as default set, pump R2 runs for 3 minutes

(adjustable range 1-30 minutes) and then ceases for 15 minutes (adjustable range 0-60

minutes), same process repeated within the preset time section.

Note: if the ceased time (CYCF) is set to 0 minute,

it means within this time section, circuit pump keeps

running without any stop.

Default time section setup:

The first time section: start at 05:00, stop at 7:00

The second time section: start at 11:00, stop at 13:00

The third time section: start at 17:00, stop at 22:00

Temperature controlled DHW pump within the

preset 3 time sections

within the preset time section, when running of the DHW

circulation pump is controlled by temperature, as default

set, pump R2 is triggered when return temperature T4 is

below 40oC, and it is stopped when T4 rises up to 45oC,

There is a precondition for triggering the DHW circuit

pump (set in submenu STAT):

Manual of SR258 intelligent controller

START ON: tank’s temperature sensor (T3 as priority selection) is 2oC higher than the preset

switch-off temperature, and then DHW circuit pump can be triggered.

Note: two Modes can’t play at the same time, when time controlled Mode is selected,

then temperature controlled Mode can’t be activated.

Default time section setup:

The first time section: start at 05:00, stop at 7:00

The second time section: start at 11:00, stop at 13:00

The first time section: start at 17:00, stop at 22:00

If it is needed to close one time section, just set the start time and stop time at a same value

(e.g. 10:00 starts, 10:00 stops)

Note:

1. Only one controlling Mode can be selected, either time control Mode or temperature

control Mode.

2. If sensor T4 should be installed, in order to avoid measuring error, please ensure to install

the sensor at 1.5m far to tank.

3. Both control Modes and temperature control mode, the parameter set steps are same.

Menu structure:

Main

Submen

u 1

Submen

u 2

Factory

set

Adjustabl

e range

Step per

adjust

Description

CIRC

DHW circuit function

TCYC

OFF

ON/OFF

Activate / deactivate the

Manual of SR258 intelligent controller

DHW circuit function

TEMP

OFF

Temperature control

DHW pump mode

TIME

Time control DHW pump

mode

STAT

ON/OFF

Tank temperature (T3)

2oC higher than the

preset switch-off DHW

circuit temperature.

CYCO

40 ℃

/3min

5-53 ℃

/1-30min

0.5 ℃

/1min

Switch-on temperature

or running time

CYCF

45 ℃

/15min

7-55 ℃

/0-60min

0.5 ℃

/1min

Switch-off temperature

or stop time

t C1O