Solar Controllers

For Split Pressurized Solar Water Heating System

SR81

Application capacity:

Max. number of collectors: 1

Max. number of storage tanks: 1

Max. number of relays: 4

Max. number of sensors: 5

Max. number of visualization application system: 1

FRT: 1* Rotary vane type electron flow meter

Main technical data:

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):

1pc (1.5KW version) ˂1.5KW

1pc (3KW version) ˂3KW

1pc (4KW version) ˂4KW

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

3*Electromagnetic relay, Max. current 2A.

HK relay (1.5KW version):10A

HK relay (3KW version):15A

HK relay (4KW version):20A

Ambient temperature: -10oC ~ 50oC.

Water proof grade: IP41

Main functions:

1.Timing heating

2.CIRC DHW Circulation pump controlled by temperature or by time

3.PWD Password

4.LOAD tank heating

5.COL Collector function

6.COOL Cooling function

7.AUX Auxiliary function

8.MAN Manual operation

9.BLPR Blocking protection

10.OTDI Thermal sterilization function

11.FS Flow rate monitoring and pump dry-running protection

12.UNIT C-F switch

13.RET Reset

14.PASS Password set

15.Manual heating

16.ECO Economic mode

17.DHW circuit pump triggered manually

18.On/Off controller

19.Holiday function

20.Manual circuit function

21.Memory protection during power failure

22.Screen protection

23.Trouble checking

System:

Terminal allocation of controller for electrical heater of 1500W

Terminal allocation of controller for electrical heater of 3000W/4000W

OHDP Heat transferring by external radiator

AH Thermostat function