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Potterton Solar - Solar Thermal Domestic Hot Water System20
3.2.5 Frost protection
This function can be switched on/off in the “Basic settings”
menu, point 11 and the start temperature can be adjusted
in point 13. Furthermore, a frost protection sensor can be
selected (T1-T6, point 12).
For systems driven without or with very low amounts of
antifreeze, the pipes and the collector have to be protected
from freezing. For this purpose, the selected frost
p
rotection sensor measures the temperature at an exposed
place, e.g. blank pipes before the collector. If the measured
value is lower than the start temperature, the solar pump
is activated until the adjusted frost protection start
t
emperature +5K is reached.The minimum runtime of
the pump is 5 minutes.
For security reasons the function is deactivated if the
temperature of the priority storage falls below 5ºC.
3.2.6 Energy productivity measurement
F
or the purposes of energy productivity measurement
(solar gain), a sensor on the collector return line and a
flow meter are required.The yield value is calculated
from the values of the temperature difference between
the collector and collector return line and the value
measured by the flow meter. This function is switched on
and off in the “Basic settings” menu.
3.2.7 Operating hours meter
So long as the storage tank is charged by a pump, the
operating hours meter records for each separate pump.
The number of operating hours can be read in menu
“info” and for each pump separately reset to 0.
“Basic Setting” “Programming” “info”
5 -- 1 --- XXXX kWh
Corresponding values in menu
“Programming” “info”
--- XXXX h
Corresponding values in menu