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ITT Lowara UK Ltd

Solar D5 Pump from Lowara


Applications
The Ecocirc D5 Solar pump can be used wherever a
highly efficient circulation pump is needed without
a direct connection to AC power. It can be
connected directly to a photovoltaic panel and is
characterized by its small size, high efficiency, very
low power consumption and its MPP tracking.
The shaftless spherical motor technology enables
a long, maintenance free and quiet service life.
Areas of application are thermal solar systems for
single family homes.
Soft start-up
The pump has been programmed for a soft startup.
When the photovoltaic panel provides sufficient
power, the pump first goes through the alignment
phase, turning the rotor into the position required for
start-up. Then the processor waits until the built-in
capacitor has recharged sufficiently.
This enables a start-up with minimal power
(less than one Watt). Cycling due to unsuccessful
starting attempts is minimized. Even after prolonged
shutdown, the pump will start reliably.
Integrated overtemperature protection
The pump comes with an integrated overtemperature
safety device, which shuts the pump electronics
off when reaching overtemperature. Normally the
temperature of the pumped media during operation
at the highest speed setting is 95°C at this point.
A complete shutdown after reaching overtemperature
condition can result in adverse effects on the
circulating system. Since the temperature of the
electronic components is influenced by the temperature
of the pumped media as well as by the
speed setting, the pump will lower its speed
automatically after reaching a critical temperature
level in order to avoid a total shutdown. However,
if the temperature continues to rise (caused e.g. by
too hot pumped media), the pump will eventually
shut down completely. After cooling down, the
pump will restart automatically.


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