Naturela NHC-H41 User manual - page 6
Heating up by a boiler
On this mode the water is heated only by the boiler installation. If the temperature in the boiler is
higher with Dif Temp2 degrees, the boiler's circulation pump turns on and the heat from the boiler
goes to the water heater. When the pump works it is visualized on the screen.
Heating up by a solar collector
On this mode the water is heated only by the solar collector's installation. If the sun is strong
enough to increase the temperature in the solar collector, the circulation pump turns on to transfer
the heat to the water heater. When the pump works it is visualized on the screen.
The Solar mode is appropriate for cases when the solar energy is enough to provide the required
amounts of hot water.
Holiday mode
If you are not using hot water for a long time, for instance if you are on vacation, business trip, etc.
and during this season the sun is strong enough, the water heater will heat too much. Therefore, it
won't be able to accumulate much heat energy and the solar collector won't be able to cool itself by
giving off its heat to the water heater. To prevent the collector's overheating and to protect the whole
installation, the Holiday mode has been made. On this work mode, during the interval set in the
setting Holiday Mode (which should be in the night), if the temperature in the water heater is over
35 degrees and the temperature of the collector is at least 10 degrees lower, the circulation pump
turns on and the heat, accumulated in the water heater, goes to the solar collector. When the sun
NHC-H41-2 Reference Manual ver 2.2
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