Shandong Isentrol Electronic Technology Co., Ltd

SR258 Split Solar Heating System Controller



2016 New Product!
Temperature measurement accuracy:0.1C
Conventional/HE(High effeciency) pump both available on

Max.number of collectors:1
Max.number of storage tanks:1
Max.number of relays:5
Max.number of sensors:4
Max.number of visualization application system: 1
Signal port for HE pump:IPWM1
FRT:1* Rotary vane type electron flow meter


Main technical data:

Size of Controller: 187mm x128mm x46mm
Power supply: AC100-240V50-60Hz. .  
Power consumption: < 2.5W
Rated impulse voltage: 2.5KV
Housing: Plastic ABS
Protection type: IP41
Mounting: Wall mounting
Operation: 6 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): 1pc ˂1500W .
Inputs: 5 sensors
1pcs*Pt1000 sensor (≤500oC) for collector (silicon cable≤280oC)
4pcs*NTC10K B3950 sensor (≤ 135oC) for tank (PVC cable ≤105oC)
1*FRT Rotary vane type electron flow meter
Outputs: 4 relays for circulation pump and backup heating
2*Electronmagnetic relay Max.current 1A
1*Semiconductor relay Max.current 1A
1* Electronmagnetic relay Max.current 10A
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
OTDI---Thermal disinfection function
FS---Flow meter type selection.
UNIT---C-F unit switch
RST---factory setting
PASS--- password set
Holiday function
Screen Protection
Trouble Protection
Trouble Checking


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