LU-VE ALFA ptigo PF27MC, Инструкция по эксплуатации

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31573808EN-02
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Alfa LU-VE is a trademark registered and owned by LU-VE Group.
Alfa LU-VE reserves the right to change specifications without prior notification.
6.7 Electrical connections
All electrical connections must be made in accordance with the locally valid regulations and in
conformance with good installation practice. The site supply voltage, frequency, accepted power
rating and number of phases must comply with the details on the technical documentation. All
electrical supply lines must be connected to the terminal boxes through suitable waterproof glands
using bottom entry or, in case of horizontal installation, the cable is routed to form a water trap.
If the heat exchangers are installed and there is to be an appreciable delay in putting the plant into
operation, a temporary electrical supply should be connected to each motor, sufficient to run for
at least 4 hours. This procedure should be carried out at least once every 4 weeks, until the heat
exchanger is fully operational. It is up to the end user to verify the conditions for protection by
automatic disconnection of supply, according to applicable standards. Heat exchangers are
designed for TN power systems. The insulation fault protection must be part of power supply of the
heat exchanger and is not supplied by the manufacturer.
The following data determine which connection diagram is to be selected and respected for
electrical installation:
• Heat exchanger model indication
• Fan motor type
• Electrical options
When in doubt always contact your local supplier or Alfa LU-VE representative for assistance.
Ensure complete electrical isolation before performing any wiring.
In accordance with the current legislation,
install a single pole terminal in a visible position
between the unit and the power supply. Opening
between terminals 3 mm at min.
Remove the terminal block cover (M).
Insert the cables into the grommet (N) and
block them with their respective gland. Connect
terminals by following the wiring diagrams on the
cover. When all connections are made refit the
terminal block cover.
For systems using electrical defrost, a defrost
termination thermostat should be used, having a
range of 10 °C to 20 °C with a sensor attached
to the top return bends of the coil block or buried
in the top of the coil block fins (J).
motors
heaters
M
motors
M
heaters
P
P
N
J
Use only Atex certified thermostat, for use in explosive atmosphere.
Any electrical component not supplied with the appliance must be installed outside the unit.
6.8 Power failure
In order to avoid damage to the compressor, the refrigerant supply must be closed in the event of
power failure, e.g. by closing the magnetic valve. Safety measures elsewhere in the system will
prevent the pressure in the heat exchanger from exceeding the design pressure.