For separated pressurized solar system

SR81Q Solar Smart Controller

Introduction:A BRIEF DESCRIPTIONOld SR868C8Q updated versionTemperature measurement accuracy:0.1C10 push buttons at the front cover.With separately keypadMain technical data:APPLICATIONS CAPACITYMax.n

  • Model: SR81Q


Old SR868C8Q updated version
Temperature measurement accuracy:0.1C
10 push buttons at the front cover.
With separately keypad

Main technical data:

Max.number of collectors:1
Max.number of storage tanks:1
Max.number of relays:4
Max.number of sensors:6
Max.number of visualization application system: 1
FRT:1* Rotary vane type electron flow meter
VFS:1*Grundfos flowmeter sensor
Signal port for HE pump: IPWM1
Size of Keypad:120mm x 120mm x 18mm
Size of Controller(1.5KW version): 187mm x128mm x46mm
Size of Controller(3KW version): 218mm x165mm x55mm
Size of Controller(4KW version): 218mm x165mm x55mm
Power supply: AC100-240V,50-60Hz. .  
Power consumption: < 2.5W
Rated impulse voltage: 2.5KV
Housing: Plastic ABS
Protection type: IP41
Mounting: Wall mounting
Operation: 10 push buttons at the front cover.
Accuracy of temperature measuring: ± 0.1oC
Range of collector temperature measuring: -10oC ~220oC
Range of tank temperature measuring: 0oC ~110oC
Suitable power of pump: 3 pump possible to be connected  
Suitable power of HK (backup heating):
Inputs: 6 sensors,
1pcs*Pt1000 sensor (≤500oC) for collector (silicon cable≤280oC),
5pcs*NTC10K, B3950 sensor (≤ 135oC) for tank, (PVC cable ≤105oC),
1*FRT Rotary vane type electron flow meter
1*VFS: Grundfos flowmeter sensor
Outputs: 4 relays, for circulation pump and backup heating
1*Semiconductor relay, Max.current 1A
2*Electronmagnetic relay, Max.current 2A
1*Electronmagnetic relay, Max.current 2A
1*Potential-free extra-low voltage relay(on/off signal)
1*PWM variable frequency output(switchable 0-10v)
Ambient temperature: -10oC ~ 50oC.
Water proof grade: IP41

Main functions:

DATE---Date setting
Timed heat---backup heating
Circle---Hot water circulation
LOAD---Setup Loading tank1
PUMP---Pump control mode
COOL---Cooling function
AUX---Auxiliary function
MAN---Manual mode
BLPR---Blocking protection function
OPARR---Parallel relay function
OHQM---Thermal energy measurement
FS--- Flow meter type selection.
UNIT---C-F unit switch
RST---factory setting
PASS--- password set
Holiday function
Screen Protection
Trouble Protection
Trouble Checking


Solar thermal controller|China Manufacturer

label: SR81Q