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Shuang Ri SR728C1 Installation And Operating Manual

Solar controller for split pressurized hot water system
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SR728C1 Solar Controller for Split Solar System
English Manual
Changzhou shuangri Electro Co.Ltd
2012.03.18

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  • Page 1 SR728C1 Solar Controller for Split Solar System English Manual Changzhou shuangri Electro Co.Ltd 2012.03.18...

  • Page 2: Table Of Contents

    Operation manual 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 remark ............................. 3 1.5 Description of symbols ........................... 3 1.6 Operation button description ......................... 4 2.
  • Page 3 Operation manual 6.3.3 DTS Standard temperature difference for circulation pump R1 (R1speed adjusting) ....53 6.3.4 RIS Gain for circulation pump R1 (R1 speed adjusting) ..............54 6.3.5 n2MN Speed adjusting of circulation pump R2 (pump R2 RPM controlling） ........ 54 6.3.6 DT2S Standard temperature difference for circulation pump R2 (R2 speed adjusting) ....

  • Page 4: Safety Information

    Operation manual 1. Safety information 1.1 Installation and commissioning • When laying cables, 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.

  • Page 5: Operation Button Description

    Operation manual 1.6 Operation button description On/off Clock Manual heating Holiday Exit/Confirm Next 2. Installation 2.1 Installing controller Note: the controller can only be installed in an area having an adequate level of protection. ►choose a suitable place ►drill the top fix hole ►fasten the screw ►move the cover plate ►hang the bottom plate on position ①...

  • Page 6: Terminal Connection

    Operation manual 2.3 Terminal connection Before to open the terminal, please be sure to switch-off the power supplier and pay attention to the local electricity supply rules.  Terminal layout  Terminal function Terminal ports Description The fuse of controller, AC250V/6.3A. Power connection ports Input Ports: For power connection, L is live wire，N is naught wire.

  • Page 7: Commissioning

    Operation manual 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.

  • Page 8: Menu Structure And Description

    Operation manual ►Press to enter the forth figure ►Repress , access main menu, “SCH 01”displays on the screen ►Repress to enter selection program, “01”blinks, the first solar system displays on the screen ►Press , to select desired solar system (system 1-10 are available) ►Press to exit programm, or waiting for 20 seconds to exit automatically.

  • Page 9: System Overview

    Operation manual 3.4 System overview System Code System description SCH1 Standard solar system SCH2 Solar system with gas boiler as backup SCH3 Solar system with solid fuel boiler as backup SCH4 Solar system with tank layered heated SCH5 Solar system with 2 storages controlled by circuit pump SCH6 Solar system with external heat exchanger SCH7...

  • Page 10: System Description

    Operation manual 3.5 System Description 3.5.1 System 1 (SCH 01) : Standard solar system - 1 tank Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (DT 1O) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (DT 1F), or the temperature of storage tank reaches the preset maximum storage temperature （...
  • Page 11 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 12 Operation manual ISTP Standstill time of pump 30min BEEP Temperature sensor fault alarm Manual control HND1 Manual operate output R1 HND2 Manual operate output R2 HND3 Manual operate output H1 PASS Password set PWDC Enter old password PWDN Enter new password PWDG Reenter new password PWOK...

  • Page 13: System 2 (Sch 02) : Solar System With Gas Boiler As Back-Up

    Operation manual 3.5.2 System 2 (SCH 02) : Solar system with gas boiler as back-up Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (DT 1O) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (DT 1F), or the temperature of storage tank reaches the preset maximum storage temperature （...
  • Page 14 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 15 Operation manual ISTP Standstill time of pump 30min BEEP Temperature sensor fault alarm Manual control HND1 Manual operate output R1 HND2 Manual operate output R2 HND3 Manual operate output H1 PASS Password set PWDC Enter old password PWDN Enter new password PWDG Reenter new password PWOK...

  • Page 16: System 3 (Sch 03) : Solar System With Solid Fuel Boiler As Back-Up

    Operation manual 3.5.3 System 3 (SCH 03) : Solar system with solid fuel boiler as back-up Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (DT 1O) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (DT 1F), or the temperature of storage tank reaches the preset maximum storage temperature （...
  • Page 17 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 18 Operation manual OHQM Thermal energy measuring function ( option) FMAX Maximum flow rate 2.0L MEDT Type of anti-freezing liquid MED% Concentrate of anti-freezing liquid INTV Pump pulse function IRUN Running time of pump ISTP Standstill time of pump 30min BEEP Temperature sensor fault alarm Manual control HND1...

  • Page 19: System 4 (Sch04): Solar System With Tank Layered Heated

    Operation manual 3.5.4 System 4 (SCH04): Solar system with tank layered heated Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (DT 1O) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (DT 1F), or the temperature of storage tank reaches the preset maximum storage temperature （...
  • Page 20 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 21 Operation manual PDLY Run-on of circulation pump BEEP Temperature sensor fault alarm Manual control HND1 Manual operate output R1 HND2 Manual operate output R2 HND3 Manual operate output H1 PASS Password set PWDC Enter old password PWDN Enter new password PWDG Reenter new password PWOK...

  • Page 22: System5（Sch05） ：Solar System With 2 Storages Controlled By Circuit Pump

    Operation manual 3.5.5 System5（SCH05） ：Solar system with 2 storages controlled by circuit pump Description: Controller monitors the temperature of collector T1 and storage tank T2,T4, if this temperature difference rises up to the switch-on temperature difference DT1O (T1,T2); DT2O (T1,T4), then Pump R1 or R2 is triggered, corresponding tank is heated until the temperature difference drops to the switch-on DT ( DT1F, DT2F), or the temperature of storage tank reaches the preset maximum storage temperature（SMX1, SMX2）, then the solar circuit pump R1, R2 are switched off.
  • Page 23 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 24 Operation manual Manual control HND1 Manual operate output R1 HND2 Manual operate output R2 HND3 Manual operate output H1 PASS Password set PWDC Enter old password PWDN Enter new password PWDG Reenter new password PWOK Password reset OK REST Recovery to factory default set Symbol Description Menu is available...

  • Page 25: System 6 (Sch06): Solar System With Heat Transfering Between Tanks

    Operation manual 3.5.6 System 6 (SCH06): Solar system with heat transfering between tanks Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (DT 1O) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (DT 1F), or the temperature of storage tank reaches the preset maximum storage temperature （...
  • Page 26 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 27 Operation manual tFLL ODB Drain-back filling time 5.0min tSTB ODB Drain-back stabilization time 2.0min OHQM Thermal energy measuring function ( option) FMAX Maximum flow rate 2.0L MEDT Type of anti-freezing liquid MED% Concentrate of anti-freezing liquid INTV Pump pulse function IRUN Running time of pump ISTP...

  • Page 28: System7(Sch07): Solar System With 2 Storages Controlled By Valve

    Operation manual 3.5.7 System7(SCH07): Solar system with 2 storages controlled by valve Description: The solar circuit pump (R1) is switched on as soon as the switch-on temperature difference (DT 1O) between the collector array (T1) and the storage tank (T2) is reached. If the temperature difference between the collector array (T1) and storage tank (T2) drops below the switch-off temperature difference (DT 1F), or the temperature of storage tank reaches the preset maximum storage temperature （...
  • Page 29 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 30 Operation manual PDLY Run-on of circulation pump BEEP Temperature sensor fault alarm Manual control HND1 Manual operate output R1 HND2 Manual operate output R2 HND3 Manual operate output H1 PASS Password set PWDC Enter old password PWDN Enter new password PWDG Reenter new password PWOK...

  • Page 31: System 8 (Sch08)：Solar System With East/West Collector Arrays And 1 Storage

    Operation manual 3.5.8 System 8 (SCH08)：Solar system with east/west collector arrays and 1 storage Description: Controller monitors the temperature difference between T1,T0 and T2, when any temperature difference meets the switch-on DT ( DT1O), pump R1,R2 will be triggered , tank is heated until the temperature difference drops to the switch-off DT ( DT1F), or tank rises to its maximum temperature( SMX1), R1 or R2 is ceased.
  • Page 32 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 33 Operation manual REST Recovery to factory default set Symbol Description Menu is available Menu is available if the corresponding function is activated Menu is specifically available in this system layout System-specific menu, only available if the corresponding function is activated - 32 -...

  • Page 34: System 9 (Sch09): Solar System With Heating Return Rise Function

    Operation manual 3.5.9 System 9 (SCH09): Solar system with heating return rise function Description: Controller monitors the temperature difference between T1 and T2, when its temperature difference meets the switch-on DT ( DT1O), pump R1 will be triggered, tank is heated until the temperature difference drops to the switch-off DT ( DT1F), or tank rises to its maximum temperature( SMX1), R1 is ceased.
  • Page 35 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 36 Operation manual MEDT Type of anti-freezing liquid MED% Concentrate of anti-freezing liquid INTV Pump pulse function IRUN Running time of pump ISTP Standstill time of pump 30min BEEP Temperature sensor fault alarm Manual control HND1 Manual operate output R1 HND2 Manual operate output R2 HND3 Manual operate output H1...

  • Page 37: System 10 (Sch10): Standard Solar System With Heat Transferring Function

    Operation manual 3.5.10 System 10 (SCH10): Standard solar system with heat transferring function Description: Controller monitors the temperature difference between T1 and T2, when its temperature difference meets the switch-on DT ( DT1O), pump R1 will be triggered, tank is heated until the temperature difference drops to the switch-off DT ( DT1F), or tank rises to its maximum temperature( SMX1), R1 is ceased.
  • Page 38 Operation manual Adjust channel Menu Description Default value Page tHET Timing heating tHET1O Switch-on time of the 1 time section of timing heating 4：00 Switch-on temperature of the 1 time section of timing heating 40℃ tHET1F Switch-off time of the 1 time section of timing heating 5：00 Switch-off temperature of the 1...
  • Page 39 Operation manual PWOK Password reset OK REST Recovery to factory default set Symbol Description Menu is available Menu is available if the corresponding function is activated Menu is specifically available in this system layout System-specific menu, only available if the corresponding function is activated - 38 -...

  • Page 40: Display Menu

    Operation manual 4. Display menu ODB Drain-back switch-on condition - time period ODB Drain-back filling time ODB Drain-back stabilization time Display the time section of drain back Note: operation Depending on the selected system and selected functions, the display and parameters can be set are different. INIT: the switch on time of drain-back Countdown indicate the rest time of time which is set in menu (tDTO)
  • Page 41 Operation manual KWH/MWH: display the thermal energy in Display the thermal energy got from sun, it only appears unit of KWH or MWH when thermal energy measuring function is selected. Controller measures flow rate reference temperature of sensors T1( flow pipe) and T0 ( return pipe) to calculated the thermal energy, and display it in unit of KWH or MWH.

  • Page 42: Access The Menu And Set (Thet) The Parameters Of Timing Heating Function (User Grade)

    Operation manual 5. Access the menu and set (tHET) the parameters of timing heating function (user grade) 5.1 Access main menu Under standby status, doing like following to access main menu. ►press , “PWD 0000” appears on the screen, the left first digital button and then press blinks, ask for entering password, factory default set password is “...

  • Page 43: Main Menu - Thet Timing Heating

    Operation manual 5.3 Main menu - tHET timing heating Description: Electrical heater, gas boiler or oil boiler can be integrated into solar system used as back-up of solar system, and they can be triggered automatically at preset time by preset temperature. Within a preset time section, when the temperature (T3)on top part of tank drops below the preset switching-on temperature of this function, back-up heating starts to work, when T3 rises up to the preset turning off temperature, back-up heating is stopped.
  • Page 44 Operation manual ►Repress button again, “00” of minute time blinks on screen ►Press button to adjust minute of time ►Repress button again, “40 C” of temperature blinks on screen ►Press button to adjust switch-on temperature teaming heating. ►Press button to exit setting. ►Press button, “tH 1F 05:00”...
  • Page 45 Operation manual ►Repress button again, “00” of minute time blinks on screen ►Press button to adjust minute of time ►Repress button again, “55 C” of temperature blinks on screen ►Press button to adjust switch-off temperature teaming heating. ►Press button to exit setting. Parameters are saved automatically. ------------------------------------------------------------------------------------------------------------------------------------ ►Press button, “tH 3o 17:00”...

  • Page 46: Function Operation And Parameter Setup (Experts Grade)

    Operation manual Application example： 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 paragraph spare parts) 6.

  • Page 47: Main Menu - Temp Temperature

    Operation manual ►Press button to adjust the value of switch-off DT, adjustable range 0 C ~ 18 （0 F~34 F）, factory set is 4 ►Press to exit menu, or wait for 20 seconds to exit automatically, the setup parameters are saved automatically.

  • Page 48: Emon Collector Maximum Switch-On Temperature

    Operation manual the temperature of collector rises up to EMOF limited temperature, solar circuit pump is ceased, but when collector temperature drops to the collector maximum switch-on temperature EMON （factory set is C）, solar circuit pump will be reset, and this function is deactivated. Note: for drain-back system, the default EMOF temperature is set as 95 C, the default EMON temperature is set as 85...

  • Page 49: Cmn Low Temperature Protection Of Collector

    Operation manual compulsively even the temperature difference is satisfied. then when more solar irradiation shines in, as a result collector temperature will rise continuously, temperature of collector maybe rise up to the evaporated temperature of heat fluid, this phenomenon names collector - overheat, it should be avoided. Through set the maximum limited collector temperature（collector cooling function）...

  • Page 50: Cfr Frost Protection Of Collector

    Operation manual ► Press button to exit the menu or wait for 20 seconds to exit automatically, parameters are saved automatically. CMN signal displays on screen, it indicates that this function is in activated. 6.2.5 CFR frost protection of collector Description: In winter when the temperature of collector is below the preset frost protection temperature (factory set is 4 C), Solar circuit pump is triggered to transfer hot water from tank to collector and heat collector.

  • Page 51: Smx1 Maximum Temperature Of Tank 1

    Operation manual ►Repress button to activate or deactivate this function, after function activated; factory set is “REC ON” ► Press button to exit the menu or wait for 20 seconds to exit automatically, parameters are saved automatically. REC signal displays on screen, it indicates that this function is in activated. 6.2.7 SMX1 Maximum temperature of tank 1 Description: When the DT between collector T1 and Tank T2 caters the switch-on DT of circulation, solar pump is...

  • Page 52: Max1 Maximum Switch-Off Temperature

    Operation manual ► Press button to exit the menu or wait for 20 seconds to exit automatically, parameters are saved automatically. 6.2.9 MAX1 Maximum switch-off temperature Setup steps: To access main menu TEMP, then select submenu MAX1, (see 5.1 and 5.2） “MAX1 60 C”...

  • Page 53: Dvwg Anti Legionnaires' Function

    Operation manual sensor or an extra output port to be used for controlling the pump or electromagnetic valve. When all inputs and outputs have been occupied, function you selected may not be available for activating. In such case, you can’t see the submenu options. For different system, activated or deactivated statuses of following auxiliary functions showed in the submenu are different.

  • Page 54: Nmin Speed Adjusting Of Circulation Pump R1

    Operation manual Setup steps: To access main menu FUN, then select submenu DVWG, （see 5.1 and 5.2） “DVWG ----” displays on screen. Default set is “OFF”. ►Press button, parameter” -----” blinks on the screen. ►Repress button, “70 C” blinks on the screen, function is triggered.

  • Page 55: Ris Gain For Circulation Pump R1 (R1 Speed Adjusting)

    Operation manual circuit pump is ceased. Note：when drain-back function is activated, DTS（ standard temperature difference of circuit pump R1） default set as 15 Setup steps: To access main menu FUN, then select submenu DTS （see 5.1 and 5.2） “DTS 08 C”...

  • Page 56: Dt2S Standard Temperature Difference For Circulation Pump R2 (R2 Speed Adjusting)

    Operation manual ►Press button to exit the menu or wait for 20 seconds to exit automatically, parameters are saved automatically. 6.3.6 DT2S Standard temperature difference for circulation pump R2 (R2 speed adjusting) Description: This controller has preset default minimum pump speed of R2 is 30%. When the switch-on temperature difference (DT 2O) reaches, solar pump R2 is triggered, and then within following 20 seconds, pump speed reaches to its minimum speed (30%).

  • Page 57: Tdto Drain-Back Switch-On Condition - Time Period

    Operation manual Note:  An extra device is needed in the drain-back system, for example, a storage tank. Only when all devices of a drain-back system are installed, drain-back function just can be triggered.  Drain-back function can only be used in the system with 1 tank and 1 collector array ( system 1,2,3,6,9) ...

  • Page 58: Tstb Drain-Back Stabilization Time

    Operation manual switch-on time section. ►Press button, parameter “5.0” blinks on the screen ►Press button to adjust the time, adjustable range: 1~30 min, default set: 5.0min.(Note:0.5min change only every time) ►Press button to exit the menu or wait for 20 seconds to exit automatically, parameters are saved automatically.

  • Page 59: Ohqm Thermal Energy Measuring

    Operation manual ►Press button, “- - -”blinks on screen, default set is “OFF” ►Repress button, to activate by-pass function, “BYPR 85 C” displays on the screen, (“85 C” blinks) ►Press button to adjust this parameter, adjustable range (5 C～120 C) (41 F ~ 248 ►...

  • Page 60: Fmax Flow Rate

    Operation manual ►Press button, select to check accumulative thermal energy, “KWH XX” or “MWH XX” “SET” displays on the screen. ►Press button for 3 seconds, buzzer makes 3 times “du-----”, the sum thermal energy is cleared, and accumulative thermal energy is reset to “00”. ►Press button, select the operation time of pump, “hP XX”...

  • Page 61: Prio Tank Priority

    Operation manual To access main menu FUN, then select submenu MED%, “MED% 40” displays on screen. ►Press button, parameter “40” blinks on the screen ►Press button to adjust concentration, adjustable range (20～70） ► Press button to exit the menu or wait for 20 seconds to exit automatically, parameters are saved automatically.

  • Page 62: Tstp Pulse Heating Standstill Time (Tstp)

    Operation manual Setup steps: To access main menu FUN, then select submenu tRUN, “tRUN 15” displays on screen. ►Press button, parameter “15” blinks on the screen ►Press button to adjust heating time, adjustable range (01~30）,factory set is 15 ► Press button to exit the menu or wait for 20 seconds to exit automatically, parameters are saved automatically.

  • Page 63: Intv Pump Pulse Function

    Operation manual ►Press button, “TST2 45 C” displays on the screen, then you can adjust the temperature of tank 2 ►Press button, “45 C” blinks on the screen ►Press button to adjust parameter, adjustable range 4 C ~ 85 C (39 F ~ 185 F),factory set is C（113...

  • Page 64: Istp Standstill Time Of Pump

    Operation manual automatically. 6.3.12.2 ISTP Standstill time of pump Setup steps: To access main menu FUN, then select submenu ISTP, “ISTP 30” displays on screen. ► Press button, parameter “30” displays and blinks, factory set is “30 minute” ► Press button, to adjust time, adjustable range 2~ 60 minutes.

  • Page 65: Hnd Manual Control

    Operation manual 6.3.15 HND Manual control When using this controller first time or when debugging this controller, outputs of this controller （R1, R2, H1）can be triggered manually , “ON, OFF” control. Setup steps: To access main menu HND, ----------------------------------------------------------------------------------------------------------------------------- -------------- ►Press button, “HND1 off”...

  • Page 66: Rest Recovery To The Factory Set

    Operation manual ►Repress button, the second digital blinks ►Press button to enter the second digital ►Repress button, the third digital blinks ►Press button to enter the third digital ►Repress button, the fourth digital blinks ►Press button to enter the fourth digital ►Press button, “PWDN 0000”...

  • Page 67: Holiday Function

    Operation manual ►Repress button, controller is switched-on again. 6.5 Holiday function Description: This function activates in night, solar liquid will flow from storage tank to collector to cool the tank, and therefore to prevent overheating problem of the solar system due to completely heated storage tank. The function is activated at night between 10 pm and 6 am, when the temperature of collector is 8 C below the storage tank temperature (T2), solar circuit pump starts to work until the temperature of collector is 2...

  • Page 68: Temperature Query Function

    Operation manual 6.7 Temperature query function Under standby status, ►Press button , you can check the value of temperature sensors T0~ T4, speed of pump 1 (n％), speed of pump 2 (n2％) , accumulative operation time of circuit pump (hP), daily thermal energy (DKWH), accumulative thermal energy (KWH) or (MWH), week and time.

  • Page 69: Trouble Checking

    Operation manual Check resistance Sensor wiring T3 - - - T3 sensor fault value or replace short or open ( only in system 4) Sensor wiring Check resistance T4 - - - T4 sensor fault short or open value or replace 8.2 Trouble checking The controller is a qualified product, which is conceived for years of continuous trouble-free operation.

  • Page 70: Quality Guarantee

    The warrantee expires within 24 months after the date of purchasing the controller. 10. Technical data Specification SR728C1 Size of controller 200mm×155mm×45mm Power supply AC230V± 10% ＜...

  • Page 71: Device Matchable To This Controller

    Operation manual 12. Device matchable to this controller Sensor for collector: high accuracy PT1000 sensor(A01) Parameter: PT1000, Ф6X50mm,1.5m cable Sensor for tank: high accuracy NTC 10K sensor (A02) Parameter: NTC10K,B=3950, Ф6X50mm, 3m cable Thermowell of sensor: stainless thermowell ( A05) Parameter: 1/2' male thread, Ф8X200mm.

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