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Check the correct run-off of the condensate liquid through the relative pipe by very slowly
pouring approx. 1/2 litre of water into the collection tray of the indoor unit (figure 22).
2.3 - ELECTRIC CONNECTIONS
2.3.1 - Electric connection between indoor and outdoor units
The connection diagrams are shown inside the lid (22) and (26) of the clamps of the internal and external units.
The electric connection between the indoor units must have the features stated in the table of the following
page.
The connection cable between the outdoor unit and the indoor units must be the "H07RN-F" type.
2.3.2 - Indoor unit electric connection (Figure 23a)
Prepare the cable for connection by stripping the insulating sheath at the ends of the conductors and crimp
the terminals of the "U" type at the ends of the conductors.
a. Open the front panel of the internal unit.
b. Use a screwdriver to open the lid (22) of the clamps compartment at the right side of the unit.
ALL THE CONNECTIONS MUST BE CARRIED OUT EXACTLY AS INDICATED IN THE
WIRING DIAGRAM.
c. Unscrew the cable tie (23) under the terminal box.
d. Make the signal cable pass through the opening on the left side, from the back of the unit towards the
front.
e. Correctly connect the cables to the terminal box (24).
f. Close the lid (22) and reassemble the plastic rear panel.
2.3.3 - Outdoor unit electric connection (Figure 23b)
Prepare the cable for the connection by stripping the insulating sheath at the ends of the conductors and
crimp the terminals of the "U" type at the ends of the conductors.
a. Loosen the screw (27) and remove the electric control board protection (26) of the outdoor unit.
b. Connect the cables to the terminal board (30) following the identification numbers on the terminal board
of the indoor and outdoor units.
c. To prevent the entry of water, form a loop with the connection cable, as shown in the installation diagram
of the indoor and outdoor units.
d. Insulate unused wires (conductors) using electrician's tape. Make sure they do not touch electric or metal
parts.
e. Block the cable (28) using the cable tie (29).
The earth cable must be fixed to the dedicated terminal, present in the electric con-
nections compartment of the indoor unit.
2.3.4 - Electric connection
Before connecting the air conditioner, make sure that:
a. The power supply voltage and frequency values respect that specified on the appliance data
plate.
b. The power supply line has an effective earth connection and it is correctly dimensioned for
maximum absorption of the climate control unit.
NEXYA S4 E INVERTER 9/12/18
EN - 7
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