SR881 pump station technical data:
1.Diamension:400mm*200mm*145mm
2.Installation: wall mounting,also suitable for mounting into patch panels
3.Power supply:200V-240V AC or 100V-130V AC,50-60Hz.  .
4.Power consumption: < 3W
5.Accuracy of temperature measuring: ± 2oC
6.Range of collector temperature measuring: -10 ~200oC
7.Range of tank temperature measuring: 0 ~110oC
8.Suitable power of pump: 2 pumps possible to be connected, power of each pump < 200W .
9.Inputs: 3 sensors,
10.Pt1000 sensor (≤500oC) for collector (silicon cable≤280oC),
NTC10K, B3950 sensor (≤ 135oC) for tank, (PVC cable ≤105oC),
11.Outputs:2 relays, for circulation pumps or 3-way electromagnetic valve
12.Ambient temperature:-10oC ~ 50oC.
13.Water proof grade: IP40.

SR881 pump station main functions:
1.Timing heating
2.Temperature difference control  1*ΔT
3.Collector emergency shutdown
4.Collector cooling function
5.Collector low temperature protection
6.Collector frost protection
7.Tank re-cooling function
8.Celsius and Fahrenheit temperature  switch
9.Maximum temperature of tank (max.number  1)
10.Anti-Legionella function
11.Temperature controlled hot water circulation pump
12.RPM speed controlling (1*semiconductor)
13.Thermal energy measuring
14.Pump interval functions.
15.High temperature by-pass function
16.Manual Control ( for 2 outputs:P1,H1)
17.Password setting
18.Recovery to factory setting
19.Holiday fucntion
20.Manual Heating
21.Temperature query function
22.Memory Protection
23.Screen protection
24.Trouble shooting
25.Trouble protection
26.Trouble checking