5. Shutdown of the DualSun individual solar pool heating
system
To stop the DualSun individual swimming pool solar heating system, stop the 3-way valve by switching MAN1
to OFF and close the isolation valves (2).
IMPORTANT
For frost risk areas, emptying the installation is compulsory and requires fitting the Du-
alSun drain kit.
For proper operation, the following recommendations must be observed:
• Air vent at the entrance of the panel field, see figure below
• Air vent oriented upwards and placed vertically or with a maximum angle of 30 ° with the
vertical
• Inclined piping / no counter slope (high point) to ensure water flow between the panels and
the drain valve
Draining / Winterizing for fros risk areas:
• Leave the isolation valves (2) open
• Stop the 3-way valve by switching MAN1 to OFF
• Close the by-pass valve (1)
• Open the drain valve (3). It is possible to connect a garden hose to the threaded nozzle to collect
the water in the basin or evacuate it toward a suitable place
• It is essential to rinse the installation with non-chlorinated water. Chlorine gas may damage the de-
vice.
• Drain completely after rinsing
• Close the drain valve (3)
• Close the isolation valves (2)
Installation, use, maintenance manual - DualSun solar heating system for individual
swimming pools
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