Ferroli RMA series, Инструкция по установке и эксплуатации

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25
CONNECTIONS
Electrical connections
The electrical wirings must be carried out by qualified personnel
according to the regulations in force at the installation time in the
country of installation. Before starting any work on the electrical
circuit make sure that the unit power supply line is disconnected
at the start.
N .B . Refer to the electrical diagram enclosed in the unit.
Power supply system
The power cables of the heat pump power supply line must be
connected to :
- for single phase power supply : from a single phase voltage
system provided with neutral conductor and separated earth
wire :
V = 230 V ± 10 %
f = 50 Hz
- for three phase power supply : from a symmetrical three
phase voltage system provided with neutral conductor and
separated earth wire :
V = 400 V ± 10 %
f = 50 Hz
The units are shipped completely factory wired and arranged for
the connection to the power supply.
The power cables must enter the unit through the holes on
the lateral panel and must be connected to the power supply
terminals of the unit.
The integrative electrical heaters (option) must be supplied by
a dedicated power supply line to be connected to the power
supply terminals inside the electrical board of the unit.
Unit power supply
The power supply cables must have an adequate section for the
power absorbed by the unit and must be chosen in conformity
with the regulations in force. Design the power supply line,
always referring to the total FLI and FLA values of the unit,
taking into account the selected options (except the integrative
electrical heaters) and the installed accessories.
Alimentazione delle resistenze elettriche integrative
The power supply cables must have an adequate section for the
power absorbed by the only integrative electrical heaters and
must be chosen in conformity with the regulations in force.
The electrical heaters must be connected to a single phase
power supply if the unit power supply is single phase or to a
three phase power supply if the unit power supply is three phase.
Upstream protection
An automatic switch suitable for ensuring protection against
overcurrents and indirect contacts must be installed upstream
each power supply line.
Coordination between line switch must be carried out observing
the regulations in force on electrical safety, regarding the type of
installation and the installation ambient conditions.
Connections available for the user
The wiring board inside the electrical panel contains dedicated
terminals for the following connections.
General alarm
Voltage output (230V - max 2A) to be used to notify the presence
of an active alarm.
Output active : active alarms
Output not active : no active alarms
Remote stand by
To turn on and off the unit, a remote device (selector, program-
mer clock, centralised supervision device ...) with a voltage free
contact suitable for switching loads of very low power, can be
connected.
This function must be enabled by parameter (see the section
“Adjustment and control”) and prevails the settings made on the
user interface.
Remote Cooling-Heating
It is possible to switch between cooling mode and heating mode
from remote by connecting a device equipped with a voltage free
contact suitable for switching loads of very low power.
This function must be enabled by parameter (see the section
“Adjustment and control”) and prevails the settings made on the
user interface.
Remote control
It is possible to connect a remote control that has all the control
and display functions available on the user interface on the unit
and therefore enables the complete remote control of the unit.
Pump control
The controller of the unit can directly activate the circulating
pump by means of a voltage free contact (maximum absorbed
current 4A).
ATTENTION
Carry out all the connections outside the unit avoiding the power
cables and the probe cables to be coupled.
If the real plant volume is higher than such calculated volume,
it is necessary to install an additional expansion vessel of
appropriate volume.
Once the hydraulic circuit has been filled, the pressure at the
expansion vessel must be slightly higher than the precharge
pressure.
If parts of the plant are placed at a lower level than the one
at which the unit is installed, verify that the components can
withstand the maximum pressure that can be present.