THE CONTROL SYSTEM

The user interface consists of a wired remote controller (5 wires, max length 50 m from the unit) with menu in 11 languages which allows the management of

 

HEATING AND COOLING SYSTEM, where the heat pump is the sole energy source. The unit, if activated in heat or cool mode, works by modulating the frequency of the compressor to maintain the temperature of the produced water to the setpoint value set by the controller. Through parameter you can use the remote controller (eg. For single-zone systems) as a room thermostat.

DOMESTIC HOT WATER PRODUCTION (DHW). The unit is activated in a heatt mode to keep the temperature of a DHW tank (not supplied) to the setpoint value. It requires a 3-way diverter valve (not supplied) and a temperature sensor (T5 probe, L = 10m, provided) to be inserted into one well of the DHW tank

ADDITIONAL SOURCES OF ENERGY (boiler or electrical heater). Depending on the parameters set, these sources can be activated in integration or replacement of the heat pump when the system is used for space heating or for DHW production. The controller also activate additional energy sources in case the heat pump is not working

ELECTRIC HEATER OF THE DHW TANK. The controller can manage the activation of  an electric heater inserted in the DHW tank as a heat integration to the heat pump, for disinfecting function, or as a source of energy reserve for DHW production in case the heat pump is not working.

FAST DHW. This function can be activated manually and it allows you to give priority to DHW production by activating all energy sources (heat pumps, electric heaters, boiler) available for DHW heating to bring in the shortest time possible the DHW tank to the setpoint required.

DISINFECT FUNCTION. You can set from the controller weekly cycles for disinfecting the water in the Dhw tank. In order to successfully execute these cycles, the heat pump must be integrated with DHW electric heater or boiler.

SILENT MODE. If active it allows a reduction of the maximum frequency of the compressor and of the fan speed in order to reduce the noise emitted and the power absorbed by the unit. There are 2 levels of silencing. Through time programming, you can define for 2 daily time bands the desired silent level (eg. during the night).

ON / OFF using an external contact. The unit can be turned on and off (eg. thermostat / remote switch) via an external contact: in this case the unit will operate in the mode set by the controller keyboard.

HEAT / COOL via external contacts. The unit can be activated in heat or cool mode via two external contacts (eg. thermostat that manages the heat and cool demand / remote switch).

ECO MODE. For heating mode it is possible to define daily time band and corresponding set point for ECO mode

WEEKLY SCHEDULING. It allows a schedulation of 6 time bands for each day of the week: for each time band it is possible to define the mode (COOL / HEAT / DHW) and the required  setpoint.

ANTIFREEZE FUNCTION. Guaranteed for outdoor air temperature down to -20°C, thanks to the management of the electronic board of the unit which allows you to heat water using antifreeze heater (standard on the plate heat exchanger), the heat pump itself working in heating mode and the electric booster (if installed).

CASCADE FUNCTION - up to 6 units can be controlled together in cascade mode (1 master unit, 5 slave units), with only one remote controller connected to the master unit. The master unit can be dedicated to the production of DHW (domestic hot water). In case of failure of a slave unit, all other units can operate normally.

MANAGEMENT OF UP TO 2 SYSTEM ZONES (1 MIXED AND 1 DIRECT). The unit is able to manage the pumps (not supplied) for both zones and, for the mixed zone only, the mixing valve (not supplied) and the water delivery temperature probe (available as an accessory).

PHOTOVOLTAIC INPUT AND SMART GRID INPUT. The unit is equipped with 2 digital inputs for the management of an input from a photovoltaic system and from the electricity grid. Working logic:

- if the photovoltaic input is closed, the unit turns on DHW mode with DHW setpoint=70°C  and(if available) the electrical heater of DHW tank will be turned on. The unit operates in cooling/heating mode as the normal logic.

- If the photovoltaic input is open and smart grid input is closed, the unit operates normally.

- If the photovoltaic input is open and smart grid input is open, the unit turns off DHW mode and can operate in cooling/heating mode for a defined period (settable via parameter) then will be turned off.

CURRENT INPUT LIMITATION BY PARAMETER.

REMOTE CONTROL OF THE UNIT VIA APP (available for ios and android).

DETAILED ALARMS DIAGNOSTICS WITH ALARMS HISTORY.

DISPLAY OF ALL OPERATING PARAMETERS.

 

REFRIGERANT CIRCUIT

Contained in a compartment protected from the air flow to simplify the maintenance operations, is equipped with DC inverter motor driven compressor twin rotary type to ensure greater dynamic balancing and reduce vibrations.

It is placed on vibration-damping rubber supports and wrapped by a double layer of sound-absorbing material to reduce the noise. Furthermore, the compressor is equipped with crankcase oil heater.

The circuit is equipped with stainless steel brazed plates heat exchanger complete with antifreeze heater, bi-flow electronic expansion valve, 4-way valve, axial fans with brushless DC motor complete with safety protection grilles, finned coil with anti-corrosion treatment made of copper tubes and aluminium hydrophilic fins. The circuit is controlled by means of temperature probes and pressure transducers and protected by high and low pressure switches.

HYDRAULIC CIRCUIT

Contained in a compartment protected from the air flow to simplify the maintenance operations, is equipped with 3-speed electronic circulator (brushless DC motor), water flow switch, automatic air vent, water manometer, expansion vessel, safety valve, Y water filter (supplied as standard, assembled by the installer).

The plate heat exchanger and all the hydraulic pipes are thermally insulated to avoid the formation of condensation and reduce heat loss.

 

ACCESSORIES

- WATER TEMPERATURE PROBE The temperature probe can be connected to perform the functions T1 / Tbt1 / Tbt2 / T5 / Tw2 / Tsolar (for more details refer to the installation and user manual of the unit).

- Rubber antivibration dampers