Rivacold RDF Serie Mode D'emploi Et D'entretien page 17

UK
7. ELECTRICAL INSTALLATION
The wiring must be carried out by qualified personnel having the necessary technical
requirements asked for by the country where the machine is to be installed.
 Provide for proper protection systems on the power supply line and check that the voltage
corresponds to that quoted on the label placed on the unit ( allowed tolerance ± 10% of the
rated tension).
 The law requires that the unit is earthed: therefore it is necessary to connect it to an efficient
earthing equipment. No liability whatsoever can be accepted if the above instruction
requirement is not complied with or if the electrical plant to which the unit is to be connected
is not made by following the law in force
 On the unit cooler is to be installed a mechanical thermostat properly set which will disabile the
heaters in case of overheating. The thermostat bulb must be placed inside the finned coil on
the upper side of the unit cooler .
7. 1 Electrical connection
On the electrical connection side (see Drawing 8-9) it is placed the terminal box used for the
connection of all electrical components of the unit cooler . For RDF models with a diameter of ø
250, inside the terminal box there are two terminal boards : one for the earth connection the other
for the fast connections were the power supply of the fan motors and heaters will connected . For
models with ø 350, inside the terminal box, there is a single terminal block for the fast connection
were the heathers and grounds will connected.
For the placing of wires on the fast connections terminal board , see the instructions as follows:
1- Insert a screw driver in the proper opening ( near the
centre of the terminal board)
2- the screw blade keeps the spring open allowing the
insertion of the wire
3- Insert the wire end without insulating cover
or provided with pinched terminal
4- Take the screw driver out. The wire now is fixed in
a safe way .
All models are equipped with fan motors having a voltage of 230V/1Ph/50-60Hz. The model with
/ED are fitted with defrosting heaters, which are preset for being powered with a voltage of
400V/3Ph/50-60Hz (see Drawing 4-6). In case there is the need of powering the heaters with a
voltage of 230V/1Ph/50-60Hz, change the connection as shown in Drawing 5-7.
For making the wires pass through , use the preset side openings .
230V/1Ph/50-60Hz
Drawing 4
R1
R2
4 3 2
1
N
L
L1
400V/3Ph/50-60Hz
L2
N
RDF Pag. 17 REV.07 03_19