Ferroli HXA SERIES, Technical Manual

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7
GENERAL FEATURES
Control system
FS
The controller is able to manage up to two zones in heating
(one by means of a mixed circuit and the other by means of a
direct circuit) and one zone in cooling (by means of a mixed
circuit).
It’s possible to realize more complex plants connecting to the
heat pump controller further expansion modules in order to
extend without limits the number of zones to be managed.
For each zone the following parameters can be set :
- set point
- daily or weekly operating time table
- climatic control curve
- room control sensor : it can be in common with the other
zones or independent (in that case it’s necessary to install
an additional room thermostat)
The microprocessor controller is able to manage not only the
unit itself but also all that components of the plant which allow
to realize a complete system.
The main
functions of the control system are :
- room temperature control according to the outdoor tempe-
rature (climatic control)
- domestic hot water production (management of 3 way
valve, storage tank, anti legionella cycles…)
- management of a heating and/or cooling mixed circuit
(pump and 3 way mixing valve)
- management of a heating direct circuit (only pump)
- management of a storage tank for heating and/or cooling
- management of electrical heaters for heating and dome-
stic hot water (3 steps logic)
- solar panels integration
- room humidity control for cooling with radiant systems
- internal programmer clock (for heating, cooling and dome-
stic hot water)
- digital input for electrical energy low tariff
- alarm memory management and diagnostic
- compressor and pump operating hour counter
- possibility to manage more units in cascade (maximum 16)
Besides the user interface of the unit to be placed indoor,
wired or wireless remote thermostats are available which
allow to control all
the operating para-
meters of the unit
and to acquire the
temperature in the
different zones in
order to realize a
more precise and
comfortable con-
trol.
The unit controller
is able to manage
a lot of different
plant solutions
enabling automati-
cally the necessary
control algorythms
according to the
components which
have been connec-
ted. The manage-
ment of such components is possible through additional
expansion modules which communicate with the unit by
means of an internal bus and provide all the inputs and out-
puts required to fulfil a complete system.
Room temperature
20 . 5 C
18 : 28