Electrical Connections; How To Turn The Electrical Components - Ferroli VM-B 20 Betriebs- Und Wartungsanleitung

ELECTRICAL CONNECTIONS

WARNING: always make sure that the electric power source has been disconnected before proceeding with
any operation.
Refer to the wiring diagrams on pages 10-13 for the electrical connections. The appliance must be connected to the
power supply by means of an omnipolar switch with contact opening distance of at least 3mm. Make sure the system
is equipped with safety valves against the risk of excessive pressures. Fit a F 2A 250V fuse on the power line to pro-
tect the appliance against short-circuits. Panels equipped with an electronic thermostat (series TA-F, TAR-F, TE-F,
TER-F) are all complete with a minimum water temperature probe. This allows the ventilating action to stop whene-
ver the temperature of the water entering the bank drops below 39°C. The commutator (series CM-F, CMR-F) is pre-
engineered for this function when the optional enabling thermostat is installed (TC-F).
If a single-rank bank is mounted, the minimum temperature probe is positioned in the housing formed on it.
If the three-way valve is installed (series VB1-F, VB3F), the minimum water temperature probe must be positioned on
the pipe prior to valve VB1-F (if installed) or on valve VB3-F, regardless of whether the single-rank bank is fitted.
In ducted versions with a multi-speed motor, three speeds of the six available can be enabled by selecting the relati-
ve connections in the terminal board installed on the motor.
Proceed in the following way to make the electrical connections:
1. Disconnect the electricity main and make sure that no one can connect it again while the operations are being
carried out
2. Remove the intake filter as illustrated in fig.9 (model VM-B only)
3. Remove the four screws (1-Fig.9) that fix the casing to the frame and take out the casing (version VM-B VM-F
only).
4. Install the terminal board that connects the ventilating unit.
5. Connect the protection wire coming from the supply line directly to the earth screw, suitable for guaranteeing the
equipotential connections of all the metal earths and structural parts of the machine (Fig. 3-A).
6. Loosen the screws of the electric power source connections.
7. Loosen the wire clamp, insert the power cable and then lock it in place.
8. Electrically connect the control panel (if applicable) to the terminal board.
9. Make sure the cables are correctly inserted and fixed in the seats, positioning them as described in fig. 3-B.
10. Fit the casing back on (version VM-B VM-F only)
11. Fit the intake filter back in place (VM-B only)
12. Hook up the electricity main again.

HOW TO TURN THE ELECTRICAL COMPONENTS

If the bank connections must be turned to the right-hand side of the machine, remember (see Fig.3-C) to re-posi-
tion all the electrical components on the left-hand side.
Fig.3
B
fixing by means of clamps, to be
used to secure the wires if single
wires are used
INSTALLATION
A
power cable coming from
the system
C
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