SR81 Solar Water Heater Controller For Split Pressure Solar Heating System

SR81 Solar Water Heater Controller For Split Pressure Solar Heating System

Introduction:

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

APPLICATIONS CAPACITY
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
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: ± 0.1^oC
Range of collector temperature measuring: -10^oC ~220^oC
Range of tank temperature measuring: 0^oC ~110^oC
Suitable power of pump: 3 pump possible to be connected
Suitable power of HK (backup heating):
1pc˂1.5KW
Inputs: 6 sensors,
1pcs*Pt1000 sensor (≤500^oC) for collector (silicon cable≤280^oC),
5pcs*NTC10K, B3950 sensor (≤ 135^oC) for tank, (PVC cable ≤105^oC),
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: -10^oC ~ 50^oC.
Water proof grade: IP41

Main Functions:

DATE---Date setting
Timed heat---backup heating
Circle---Hot water circulation
LOAD---Setup Loading tank1
COL---Collector1
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

Working Principle:

1.When the temperature of the panel collector reaches the set valve, the controller shall start the circulation pump automatically.

2.The circulation pump makes heat-conducting liquid circulate automatically.

3.The heat-conducting liquid transfer heat to water by the heat exchanger in the water tank. 4.In case the temperature of the collector dose not reach the set valve, the circulation pump shall be shut automatically 5.In case the temperature of the water tank dose not reach T-max, then start the auxiliary heating device.

Specification of flat plate solar collector:

1) Low iron textured tempered glass(3.2mm thickness)offers the best capability of durability, strength.

2) Tinox blue titanium or black chrome coating have very high absoption rate to ensure the high efficiency.

3) Whole-plate ultrasonic welding technology makes the flate plate solar collector more beautiful, efficient and durable.

4) Special Anodized aluminum alloy frame to ensure handsome appearance and can accept high pressure without leakage.

System: