Naturela NHC-H41 User manual - page 5
Combined mode 2: A solar collector, a boiler and an electrical heater restricted by a timer
On this mode the water will be heated by all the heat sources connected to the water heater. If the
temperature in the boiler is higher than that in the water heater with Dif Temp2 degrees, the
circulation pump of the boiler turns on. If the temperature in the solar collector is higher than that in
the water heater with Dif Temp degrees, the collector's pump turns on. If the current time is in the
permitted by the two timers interval, and if the temperature in the boiler is lower than the set
temperature, the electrical heater turns on. On the screen are displayed not only the temperatures of
the different heat sources, but the circulation pumps' and the electrical heater's work as well.
This mode is appropriate in cases when the solar energy and the energy from the additional heat
source is not enough and need to be used the electrical heater. For instance, if you need hot water in
the night, when there is no sun and the heating boiler doesn't work, then you can heat up the water
with the electrical heater. While working on this mode the water heater will automatically start
using the additional heat sources as soon as it finds out that they have high enough temperature to
give off heat. For example, if you have a fireplace with a water heating installation, after you light it
up and the temperature of the water increases enough, it will start heating up the water heater.
Combined mode 3: A solar collector and a boiler
On this mode you can use at the same time both solar energy, if it has heated enough the solar
collector, and the boiler or the fireplace, if the temperature has increased enough. This is a very
useful mode, because the controller automatically finds the heat presence and uses it while possible.
NHC-H41-2 Reference Manual ver 2.2
page 5 / 15