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Description of product
The Grant GSD1 and GSD2 Differential Solar Controllers
automatically manage the operation of the Solar Thermal
System. Monitoring the temperature in both collector and
cylinder, they operate the circulating pump only when
the difference in temperature will provide efficient
heating of the hot water. They will also stop the
circulating pump if the temperature in the collector
exceeds the maximum set or, if the cylinder has reached
the required temperature.
The Grant GSD1 controller is used where the collectors
are located on the same side of a roof - such as with a
South facing installation, whereas the Grant GSD2 is
used where the collectors are located on either side of
a roof - such as with an East/West facing installation.
Both solar controllers monitor and display the amount of
solar power produced by the system on a daily and
cumulative basis. Amongst other features the controllers
can display the collector and cylinder
temperatures and they also incorporate a pump kick
facility which activates the pump for a short period
each day to prevent the possibility of seizure if not
operated for more than 24 hours.
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