The Control System - Ferroli OMNIA S 3.2 Manuel D'installation, D'utilisation Et D'entretien

OMNIA S 3.2

2.3 The control system

The user interface consists of a controller integrated into the indoor unit with a
multilingual menu that allows the management of:
• HEATING AND COOLING SYSTEM where the heat pump is the only energy
source. If the unit is activated in heating or cooling mode, it works by modula-
ting the compressor frequency to maintain the produced water temperature at
the set point value set by the controller.
• DOMESTIC HOT WATER PRODUCTION (DHW). The unit is activated in he-
ating mode to maintain the DHW external tank temperature at the set point
value.
• ADDITIONAL ENERGY SOURCES:
- System electric heater (IBH). Depending on the parameters set, it can be
activated in Integration or substitution of the heat pump when the system
serves the heating plant. The electronic board will activate the electric he-
ater if the heat pump does not work due to an alarm or due to reached
operating limits.
- Boiler (if installed). Depending on the parameters set, it can be activated
in Integration or substitution of the heat pump when the system serves the
plant in heating or DHW production. The electronic board will activate the
boiler if the heat pump does not work due to an alarm or due to reached
operating limits.
• ELECTRIC HEATER DHW TANK. In sanitary mode it can manage an electric
heater inserted in the DHW tank as an integration to the heat pump, anti-
legionella function, or as a backup energy source for DHW production if the
heat pump does not work due to an alarm or due to operating limits. The
DHW tank electric heater is essential for the anti-legionella function and for
the photovoltaic input function.
• FAST DHW. This function can be activated manually that allows you to give
priority to the domestic hot water by activating all the energy sources (heat
pump, electric resistances, boiler) available for DHW heating to bring the
DHW tank to the set point in the shortest possible time.
• ANTI-LEGIONELLA FUNCTION. It is possible to set anti-legionella weekly
cycles from the controller. In order to carry out these cycles correctly, the heat
pump must be integrated with the DHW tank or boiler electric heater.
• SILENT MODE. If active, it involves a reduction of the maximum compressor
frequency and fan speed to reduce the noise emitted and the power absorbed
by the unit. There are 2 levels of silencing. Through time programming, it is
possible to define the desired silencing level for 2 daily time bands (e.g. at
night).
• ON / OFF via an external contact. The unit can be activated and deactivated
(e.g. zone thermostat / remote switch) via an external contact: in this case the
unit will operate in the way set via the controller keyboard.
• HEATING / COOLING via external contacts. The unit can be activated and
deactivated in cooling and heating mode via 2 external contacts (eg. Zone
thermostat that manages the request for cooling and heating / remote switch).
• ECO. Possibility of warmly defining the time bands and relative setpoint for
the ECO mode.
• WEEKLY SCHEDULE. It allows differentiated hourly programming for each day
of the week by defining the mode (COOL / HEAT / DHW) and the working setpoint
for each band.
• ANTIFREEZE PROTECTION. It is activated if the water temperature measu-
red by the temperature probes present in the indoor unit falls below 4 ° C: it
provides for the activation of the internal circulator and possibly the heat pump
in heating mode, and / or the electric heater for DHW boiler (if installed) and /
or the boiler (if installed).
• MANAGEMENT OF UP TO 2 ZONES (1 MIXED AND 1 DIRECT). The unit
is able to manage the pumps of both zones and. for the mixed zone only, the
mixing valve and the water delivery temperature probe.
• SOLAR THERMAL MANAGEMENT. The unit is able to manage the solar
pump and the temperature of the solar collector.
• PHOTOVOLTAIC INPUT AND SMART GRID INPUT. The unit is equipped
with 2 digital inputs for the management of an input from the photovoltaic
system and from the electricity grid. Working logic:
- if the photovoltaic input is closed, the unit activates the DHW mode with
DHW setpoint = 70 ° C and will activate the electric heater of the DHW tank
(if installed). The unit will continue to operate in cooling / heating mode with
the normal logic set.
- If the photovoltaic input is open and the smart grid input is closed, the unit
works normally.
- If the photovoltaic input is open and the smart grid input is open, the unit
deactivates the DHW mode and can operate in cooling / heating mode for
a defined period (which can be set via a parameter), then it will be deac-
tivated.
• CURRENT LIMITATION BY PARAMETER.
• REMOTE CONTROL OF THE UNIT VIA APP (available for IOS and Android).
• Detailed ERROR DIAGNOSTICS with historical alarms.
• DISPLAY OF ALL OPERATING PARAMETERS.
Cod. 3541V941 - Rev. 00 - 09/2021
45
°C
25
°C
fig. 2 - user interface
EN
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