EN
Solar Pump Station SR881
The Demax SR881 is a preassembled, leak-tested single-pipeline solar pump station that transfers heat from solar collectors to storage tanks. It operates by using temperature sensors to detect collector-tank temperature differences (ΔT): when the collector is hotter, the pump activates to circulate heated fluid. Integrated valves prevent gravity-driven backflow, while a controller manages automated functions and safety measures via 100–240V power. The station also includes components for system maintenance (flushing, filling) and monitoring (flow rate, pressure).
- Introduction
- Main features
- Specifications
- Recommended
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Key Features |
Technical Specifications |
Functions |
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Preassembled & leak-tested single-pipeline assembly |
Dimension: 400mm215mm150mm |
Timing heating |
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Wall/patch panel mounting |
Installation: Wall mounting (suitable for patch panels) |
Temperature difference control (1°ΔT) |
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Low-power operation |
Power supply: 100…240V ~(50…60Hz) |
Collector emergency shutdown |
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Multi-sensor temperature monitoring |
Power consumption: < 3W |
Collector cooling function |
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Dual-pump compatibility |
Accuracy of temperature measuring: ± 2OC |
Collector low temperature protection |
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IP40 water resistance |
Range of collector temperature measuring: -10 ~200OC |
Collector frost protection |
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Integrated safety/maintenance components (valves, flushing unit) |
Range of tank temperature measuring: 0 ~110OC |
Tank re-cooling function |
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Suitable power of pump: 2 pumps (each < 200W) |
Celsius and Fahrenheit temperature switch |
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Inputs: 3 sensors (PT1000/NTC10K B3950) |
Maximum temperature of tank (max. number 1) |
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Outputs: 2 relays (for pumps/3-way valves) |
Anti-Legionella function |
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Ambient temperature: -10OC ~ 50OC |
RPM speed controlled hot water circulation pump |
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Water proof grade: IP40 |
Temperature controlling (1° semiconductor) |
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Thermal energy measuring |
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Pump interval functions |
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High temperature by-pass function |
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Manual Control (for 2 outputs: P1H1) |
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Password setting |
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Recovery to factory setting |
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Holiday function |
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Manual Heating |
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Temperature query function |
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Memory Protection |
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Screen protection |
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Trouble shooting |
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Trouble protection |
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Trouble checking |
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Parameter |
Details |
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Dimension |
400mm215mm150mm |
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Installation |
Wall mounting; also suitable for mounting into patch panels |
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Power supply |
100…240V ~(50…60Hz) |
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Power consumption |
< 3W |
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Accuracy of temperature measuring |
± 2OC |
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Range of collector temperature measuring |
-10 ~200OC |
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Range of tank temperature measuring |
0 ~110OC |
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Suitable power of pump |
2 pumps possible; power of each pump < 200W |
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Inputs |
3 sensors:• PT1000 sensor (≤500OC) for collector (silicon cable ≤280OC)• NTC10K B3950 sensor (≤135OC) for tank (PVC cable ≤105OC) |
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Outputs |
2 relays (for circulation pumps or 3-way electromagnetic valve) |
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Ambient temperature |
-10OC ~ 50OC |
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Water proof grade |
IP40 |
