SR81 Differential Solar Controller

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Description Technical Documents SR81 Differential Solar Controller The Basic differential Solar controller calculates the temperature difference between collector sensor T1 and tan k sensor T2. If the difference is larger than or identical to the adjusted switch-on temperature difference, the solar circulation pump (R1) will be switched on and the tank will be loaded until the switch-off temperature difference or the maximum tank temperature is reached. Supply includes: 1 * SR81 controller 1 * accessory bag 1 * user manual 1 * PT1000 Solar Collector Temperature sensor (φ6*50mm,cable length 1.5meter) 2 * NTC10K Tank Temperature sensor (φ6*50mm,cable length 3meter) 1 *10A power cable ( Note: controller for 3000W electrical heater has no power cable delivered, user should prepare a cable of 2.5mm2) Input ports T1: PT1000 temperature sensor, for measuring the temperature of collector T2 ~T5: NTC10K, B=3950 temperature sensor, for measuring temperature of tank and pipe. FRT: For rotary vane type electronic flow meter 1500W Output ports Input Ports L, N: for power connection, L: live wire, N: zero wire, protective wire, with 10A power plug. Output R1: Electromagnetic relays, Max. Current: 2A Output R2: Electromagnetic relays, Max. Current: 2A Output R3: Electromagnetic relays, Max. Current: 2A Output HR: Electromagnetic relays, designed for on/off control of back-up heating device, Max. Current: 10A ( @AC230V, for 1500W electrical heater, @110VAC, for 750W electrical heater) Show more