Description Control Configurations & Arrangements Technical Documents SR658 Differential Solar Controller Solar Hot Water differential controller. it turns on circulating pump when collector temperature is above tank temperature by a differential temperature adjustable set point. Supply includes: 1 * SR658 controller 1 * user manual 2 * screws and expansion 2 * P1000 temperature sensor (φ6*50mm,cable length 1.5meter) 4 *NTC10K temperature sensor (φ6*50mm,cable length 3meter) 1 *clamp bag Technical data Inputs： 2* PT1000 temperature sensors, 6* NTC10K B=3950 temperature sensors, 1* Grundfos Direct Sensor (VFS type) ,1* Rotary blade electronic flow meter(FRT) Output： 3* Electromagnetic relay, Max. current 1A, 3* Semiconductor repay, Max. current1A, 1* low voltagerelay(on/off signal), boiler on/off control, 3* PWM variable frequency output (switchable 0-10V) CONTROL CONFIGURATIONS & ARRANGEMENTS
