Manual of SR258 intelligent controller
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temperature of collector antifreeze function CFRF, the solar pump will be switched off again.
If collector antifreeze function is activated, sign blinks on the screen slowly.
Note:
Since this function uses the limited heat which is saved in the tank, so the
antifreeze function should be used in regions where ambient temperatures is around
the freezing point only for a few days.
OTCO Tube collector function
This function is used for improving the switch-on behavior in systems with non-ideal sensor
positions (e. g. with some tube collectors).
This function operates within an adjusted time section. It activates the collector circuit pump
R1 for an adjustable runtime between adjustable pauses in order to compensate for the
delayed temperature measurement.
If the runtime is set to more than 10s, the pump will run at 100% for the first 10s of the
runtime. For the remaining runtime, the pump will run at the adjusted minimum speed.
If the collector sensor is defective or the collector is blocked, this function will be switched off.
Menu structure
