Description
You can easily change the settings, but it is recommended to seek the
advice of a professional. Our controller is equipped with potentiometers, a
switch, a button and a jumper. To change the position of the jumper, the back
cover must be removed. It has two temperature sensor inputs. Both sensors are
Pt1000, one measuring the temperature in the collector and the other in the water
tank. There is one output on the controller which operates the circulating pump.
On this output appears the input supply voltage, which can be 150V - 240V AC.
The maximum current drawn by the pump is 5A.
Display
When changing potentiometers, the display automatically shows the value
of the changing potentiometer.
Otherwise, it shows the tank temperature for 3 seconds and the solar
collector temperature for 10 seconds. A dot is displayed to distinguish between
the two values.
Temperature of the
water tank
(Dot)
Temperature of the
collector
(No dot)
Levtech Service & Prodtuction SRL
Potentionmeters
Ÿ With the OFF TIME potentiometer, you can set how long the pump will run
after the temperatures have equalised. This can be useful to prevent the warmer
heat transfer medium from stagnating in the pipes, possibly damaging them. Its
value can be set from 0 to 20 seconds.
Ÿ TEMP DIFF determines the temperature difference at which the controller
should switch. When the solar collector temperature becomes higher than the
tank temperature with this value, the controller will start the pump. Adjustable
from 2 to 22 degrees.
Ÿ The START TEMP potentiometer is used to set the system start
temperature. The collector temperature must be higher than this value for the
pump to start, regardless of the temperature difference between the collector and
the tank. E.g.: solar collector = 38, tank = 30, START TEMP = 40, TEMP DIFF = 6
degrees Celsius. Even if you have the 6 degrees difference, since the collector
temperature has not reached 40 degrees, the pump will not start.
