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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
Inputs： 2* PT1000 temperature sensors, 6* NTC10K B=3950 temperature sensors, 1* Grundfos Direct Sensor (VFS type) ,1* Rotary blade electronic flow meter(FRT)