Electrical Connection Of The Sea Water Pump; Power Supply Connection - Vitrifrigo MACS 7 Serie Manuel D'installation

The panel must be at a maximum distance of 4.5 m from the electrical box of the machine. The control panel
must be connected to the electronic board of the air conditioner (inserted in the electrical box) via the 4-pole
RS485 cable supplied. Make sure that the terminals of the connection cable are well hooked both on the
electronic board and on the back of the panel. When choosing the position of the panel, consider that the
length of the cable supplied is 4 m.
9.3

Electrical connection of the sea water pump

The sea water pump must be connected to the electronic board of the air conditioner, using a 3-wire cable
(phase, neutral and earth) with a section suitable for the power of the pump itself.
As you can see from the wiring diagram in figure 9, the pump phase must be connected to terminal 8 on the
board, the neutral to terminal 9. The earth cable must instead be connected to the earth pin as in figure 8
inside the electrical box.
The circuits of the electronic board are suitable for supplying power pumps up to 0.7 kW at 220V.
If there are several air conditioners and the sea water circuit is common, terminals 8 and 9 of each electronic
board will be connected to a relay box. The pump power supply, independent from that of the air
conditioners, will be supplied by the relays connected in parallel between them and each controlled by an air
conditioner.
9.4

Power supply connection

The power supply must have the characteristics (voltage, number of phases, frequency and amperage)
suitable for the model of air conditioner used (see label on the machine).
The air conditioner must not be connected directly to the electricity network, but to an
intermediate distribution panel equipped with all the safety devices provided for by current
regulations. Each unit on the boat requires a dedicated differential thermal magnetic circuit
breaker and a protection fuse compliant with current regulations. For their sizing refer to
the data shown on the machine label.
When connecting the machine follow the guidelines:
- The conductors used for the power supply must be sized according to current regulations, with a
section sufficient to carry the current required by the machine. Always refer to the machine label.
- It is important to consider that the sea water pump is powered directly by the electronic board of
the air conditioner. Therefore, when sizing the switch and the conductors, keep in mind that they must also
withstand the power of the pump (indicated on the label of the same).
- If there are several air conditioners on the boat, and they have a common water circuit, the pump
will be powered directly from the network (and not from the electronic board), therefore it will be necessary
to provide a special differential magneto thermic switch and a fuse of protection correctly sized (refer to the
pump label).
- For all electrical connections below the waterline, use suitable connectors.
The power cable from the distribution panel must be connected to terminals 4 (neutral) and 5 (phase) of the
board
control electronics and to the earth terminal block (see wiring diagram).
It is mandatory, by law, to connect the machine to an efficient earthing system. No liability
is accepted for any damage resulting from failure to comply with this provision. An
incorrect connection of the electrical connection or of the machine grounding will
invalidate the product warranty.
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