Welcome to Jiangsu Imposol New Energy Co., Ltd!
Product Name
Split Pressure Series Controller
SR658(SR618C6) Solar Hot Water Controller
SR658(SR618C6) Solar Hot Water Controller
Product Model: SR658


SR658 Controller Is The Updated Version Of The SR618C6 Controller .

  1. 19 systems can be programmer

  2. Support firmware update by SD card

For below solar hot water system  :

  1. Split type high pressure system 

  2. Split type Low / Non pressure system + Assistant tank with float ball


  1. Max.number of collectors:2

  2. Max.number of storage tanks:2

  3. Max.number of relays:6

  4. Max.number of sensors:8

  5. Max.number of visualization application system:19

  6. Signal port for HE pump:PWM1,PWM2,PWM3

  7. FRT:1*Digital flowmeter sensor

  8. VFS:1*Grundfos flowmeter sensor


  1. Size of Controller: 208mm x158mm x43mm

  2. Power supply: AC100-240V,50-60Hz. .  

  3. Power consumption: < 2.5W

  4. Rated impulse voltage: 2.5KV

  5. Data interface: TF(micro SD)

  6. Housing: Plastic ABS

  7. Protection type: IP41

  8. Protection class: 1

  9. Degree of pollution: 2

  10. Mounting: Wall mounting

  11. Display: System-Monitoring for visualization of the systems, LED and background illumination

  12. Operation: 5 push buttons at the front cover.

  13. Accuracy of temperature measuring: ± 0.1oC

  14. Range of collector temperature measuring: -10oC ~220oC

  15. Range of tank temperature measuring: 0oC ~110oC

  16. Suitable power of pump: 6 pump possible to be connected  

  17. Suitable power of HK (backup heating): 1pc ˂220W .

  18. Inputs: 8 sensors,

    2pcs*Pt1000 sensor (≤500oC) for collector (silicon cable≤280oC),

    6pcs*NTC10K, B3950 sensor (≤ 135oC) for tank, (PVC cable ≤105oC),

    @1* Grundfos Direct Sensor (VFS type)
    @1* Rotary blade electronic flowmeter (FRT)

  19. Outputs: 6 relays, for circulation pump and backup heating

    3*Electronmagnetic relay, Max.current 1A

    3*Semiconductor relay, Max.current 1A

    @1*Potential-free extra-low voltage relay(on/off signal)

    @3*PWM variable frequency output(switchable 0-10v)

  20. Ambient temperature: -10oC ~ 50oC. 

 Delivery list

  1. 1 * SR658 controller

  2. 1 * user manual

  3. 2 * screen and expansion

  4. 2 * P1000 temperature sensor (φ6*50mm, cable length 1.5meter)

  5. 4 * NTC10K temperature sensor (φ6*50mm, cable length 3meter)

  6. 1 * clamp bag

Note: TF (Micro SD) isn’t included in the delivery list

Terminal connection


  1. T0~T1: PT1000 temperature sensor, for measuring the temperature of collector

  2. T2~T7: NTC10K, B=3950 temperature sensor, for measuring temperature of tank and pipe

  3. PWM1, PWM2, PWM3: Signal ports for high efficiency pump, detailed connection see below

  4. picture

  5. HK-A, HK-B: Dry connection on/off signal ports, (HK and HR simultaneously open or close,

  6. for boiler heating control)

  7. Communication port 485: ELA485, for remote control communication( function not available

  8. now)

  9. FRT: For Rotary blade electronic flowmeter

  10. VFS: For Grundfos flowmeter sensor

  11. Input Ports L, N: for power connection, L: live wire, N: zero wire, PEE: protective ground wire

  12. Output R1: Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A

  13. Output R2: Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A

  14. Output R3: Semiconductor relays (SCR), designed for pump speed control, Max. Current: 1A

  15. Output R4: Electromagnetic relays, designed for pump or 3-ways electromagnetic valve, Max. Current: 1A 

  16. Output R5: Electromagnetic relays, designed for pump or 3-ways electromagnetic valve, Max. Current: 1A

  17. Output HR: Electromagnetic relays, designed for back-up heating device, Max. Current: 1A

Main functions:

  1. DATE---Date setting

  2. Light---Display lightness adjustable

  3. Timed heat---backup heating

  4. Circle---Hot water circulation

  5. Sys—Application programmer

  6. LOAD---Setup Loading tank1

  7. LOAD2--- Setup Loading tank2

  8. COL---Collector1

  9. COL2---Collector2

  10. PUMP---Pump control mode

  11. LLOGI---Tank loading logic

  12. COOL---Cooling function

  13. HEATX---Thermal energy transfer between tanks.

  14. RPH---Preheat heating return function

  15. AUX---Auxiliary function

  16. MAN---Manual mode

  17. BLPR---Blocking protection function

  18. OTDIS---Thermal disinfection function

  19. OPARR---Parallel relay function

  20. OHQM---Thermal energy measurement

  21. GFDS---Registration of Grundfos sensor

  22. UNIT---C-F unit switch

  23. OSDS---SD card

  24. REST---reset

  25. PASS--- password set

  26. Firmware update

  27. Holiday function

  28. Screen Protection

  29. Trouble Protection

  30. Trouble Checking






Quick Inquiry
Message *
Name *
Verification code *
  • Tel: 0086-519-81580028
  • Fax: 0086-519-83251620
  • Add: No.5, Shengda Road, Konggang Industrial Park, Luoxi Town, Xinbei District, Changzhou City, Jiangsu Province China.
Friendly Link
Follow us
Designed by Zhonghuan Internet CopyRight © 2015 Jiangsu Imposol New Energy Co., Ltd All Rights Reserved.   sitemap