Ferroli RXA, Техническое руководство

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7
GENERAL FEATURES
Versions
Each model can be supplied in three different versions to meet the application needs of the systems. The unit always comes
assembled, wired and factory-tested.
Basic Version - VB
The unit does not contain a circulating
pump or storage tank. Therefore an
adequate flow of water through the
plate-type exchanger must be
guaranteed to prevent activation of the
internal safety devices. If adequately
sized, the pump can in any case be
connected to the unit’s electrical panel
and managed by the controller.
Pump Version - VP
The unit contains a circulating pump,
metal cartridge filter (to protect the
plate-type exchanger), air vents and
drain cock.
Storage Version - VA
The unit contains a storage tank
(configured as storage on the delivery to
the system), circulating pump, metal
cartridge filter (to protect the plate-type
exchanger), air vents, safety valve,
expansion tank and drain cock.. The
tank is also arranged for fitting
antifreeze or supplementary heating
elements.
The command and control electrical panel incorporated in the
unit contains all the power, adjustment and safety components
necessary to guarantee correct operation. The main switch
and user interface are accessible from the outside by opening
a hermetic door.
The main components are :
- main switch (thermal magnetic)
- microprocessor controller with user interface and
incorporated phase cut card
- compressor contactor
- wiring board with transformer, protection fuses and user
terminal block
- mesh filter
- compressor start condenser (units with single-phase power
supply only)
- start condenser for fans
- device for control of presence and correct power supply
phase sequence (units with three-phase power supply only)
The unit is managed by a
microprocessor controller to
which all the loads and control devices are connected by
means of a wiring board. The user interface comprises a
display and 4 buttons for displaying and possibly modifying all
the unit’s operation parameters. A remote keyboard with all the
functions of the interface fitted on the machine is available as
an accessory.
The main functions available are :
- adjustment of treated water temperature (by setting the
setpoint)
- climate control in heating (modification of setpoint according
to the outside air temperature)
- dynamic defrost according to outside air temperature
- display of active alarms and alarms history
- continuous fan speed control
- pump management
- recording of compressor and pump operation hours
- serial communication by Modbus protocol
- remote standby
- remote cooling-heating
- digital output for general alarm