Solar controller with two/three sensors,switches the pump on
when there is heat to be recovered from the solar collector.
Has large LCD display that continuously shows the
temperature in the tank,sensor positions,pump position and
direction.
Solar collector temperature displayed at the press of a button.
Controller has frost protection ,is used as a back up to a frost
valve.
For reliable protection against frost, a closed loop setup with
anti freeze mix would be best,please dont use car anti freeze
as it is toxic.
Controller can be programmed for temperature difference
circulation or a ring main 3 section time function.
Suitable for 2/4 kw element .
Unit has multiple safety features.Low power consumption.
Controller can help extend anti freeze life when used in a
closed loop.
Best of all is the power saving function-unit will only activate
hot water element if the tank temperature has not reached the
preset temperature by the end of the day,or what ever time you
set.
SR868c8 Solar controller will not control overheating.
To address overheating check collector sizing,angle and
direction.(see collector angle)
Wilo bronze circulating pump:
All rotating parts of the pump are surrounded by flowing
water, including the motor rotor.
These pumps are designed to pump hot water from minus
10 to 100 degrees Celsius.
Power consumption at maximum speed is a minimal 100
watts.(230v)
Sr868c6 electrical heater wiring diagram PDF file
