The 2 supplied NTC sensors, should be connected according scheme below in order to optimize the solar thermal
energy detection when solar pump is activated by the solar control.
Pict.26 – Connections in the external system box – “Sol”
Specifications:
T min – lower limit of temperature in storage tank to allow start up of HP .
- default setting is 35ºC and values can be selected between 20ºC and “Tset-3ºC”.
“dTon” – setting for temperature differential at which the HP is switched ON
- default setting is 6ºC (available range from 2ºC – 10ºC)
Note: the differential temperature for comparison with defined/default “dton” is measured as:
T dif = T tank – T coil
- T tank = minimum value measure by T top in HP or T tank (supplied sensor assembled in pocket at middle
of the tank)
- T coil = value measure by supplied sensor assembled in inlet of indirect coil.
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