Plum ecoMAX920P2-I, Operation And Installation Manual

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thermal characteristics of the building. The
less heated building the higher heating curve
should be. Heating curve should be selected
experimentally by changing it in several day
intervals. Detailed description concerning
how to select a heating curve and weather
control settings are given in installer’s
manual. Heating curve should be selected by
the installer.
Selection of room thermostat settings
The controller enables correction of preset
temperature of water in heating circuit in
accordance with room temperature readings.
The higher discrepancy between preset and
measured room temperature, the higher
correction of temperature of water in heating
circuit. Detailed description concerning room
thermostat settings are given in installer’s
manual.
9.4 Solar
he controller operates a basic solar system
which loads the HUW tank. Solar system
operation requires additional temperature
sensors. No additional module is required.
Information concerning condition of the solar
system can be found in:
menu

Information

Solar
or on the last screen of the display which can
be accessed by clicking an arrow on the right
side of the main screen, element no. 11.
Optimize preparation of HUW in
order to take a full advantage of
heat gains from the solar panel.
Preparation of HUW can be optimized by
appropriate programming of time program
for HUW tank. Set HUW tank work mode to
“Auto”. Define time program for HUW tank in
such way to set insolation periods as “night”.
Due to this the boiler will not heat up the
HUW tank. Similar effect can be obtained by
setting the work mode for HUW tank to “Off”
manually.
Loading HUW tank can be also optimized by
setting a lowest possible preset temperature
of HUW tank. The lower preset temperature
of HUW tank, the less often boiler will
become active in order to load the tank and
solar energy gain will be higher.
Installer from a service level should set the
highest possible HUW tank maximum
temperature.
This will generate the
maximum heat gain. On the other hand there
is a risk of scalding with hot water and
exceeding temperature limit for a particular
HUW tank!
Risk of scalding with HUW! In order
to protect against scalding, install
an additional protective automatics,
e.g. thermostatic mixing valve.
During periods of very high insolation, there
can be a situation in which the HUW tank is
not able to absorb big amount of heat. In
such case, a solar pump transporting heat
from a solar panel to HUW tank becomes off.
Due to a risk of damaging the pump, it is
turned off only when the solar panel
temperature drops. In practice, the solar
system is turned on again the next day after
the sunrise. It indicates a normal operation
resulting from the fact that there is no
possibility of absorbing the heat surplus.
9.5 Internet
The regulator can be connected with the
Internet with the use of an additional
ecoNET300 module. Detailed information is
available on the manufacturer’s website.