3 Electrical and control settings
Unit electrical wiring and connection
SMGB0137 rev.0 - 05/2021
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Follow the steps below to connect the earth wire to the earth connection in the electrical box:
1
Where necessary, loosen the screw on the earthing connection in the electrical box.
2 Connect the shielded part of the power supply earth wire and the signal wiring earth wire to the earth connection.
3
Tighten the screw on the earthing connection in the electrical box.
4
Check that the shielded part of the earthing cables are correctly secured.
Firmly secure the cables using a tie inside the electrical box.
Cover the cables and the hole using a sealant to protect them from condensation and insects.
Test runs
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C A U T I O N
• Be careful during the test runs, as some of the safety functions remain disabled: the units operate for two hours without switching off
via the thermostat. The three-minute compressor protection is not enabled during the test.
•
Secure the rubber bushes to the panel using adhesive when the outdoor unit ducts are not used.
•
The compressor remains at a standstill during forced stoppage.
3.1.4 Electrical connection of RCD units
Work prior to the electrical connection
1
Turn off the power supply switches before starting work and fit the appropriate locks and safety warnings.
2
Wait 5 minutes after turning off the power supply switches.
3
Check that the fans on the indoor and outdoor units are at a standstill before starting work.
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N O T E
• The electrical power for the unit must involve a specific power line, with an exclusive power control switch and residual current breaker,
installed in line with local or national safety regulations.
• Check that the electrical power line has enough capacity to supply the unit. Its length, the cable diameter and their protection (sleeve
or jacket) must be appropriate for the unit.
• For further information, always consider the current regulations in the country where the unit is to be installed.
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C A U T I O N
• Risk of fire: cables must never touch the refrigerant pipes, printed circuit boards (PCB), sharp edges or electrical components inside
the unit to avoid damaging them.
• Loose connection terminals may lead to cable and terminal overheating. The unit may operate incorrectly, leading to a risk of fire.
Check that the cables are firmly secured to the connection terminals.
Electrical connection
Check that the power supply for the RCD indoor unit is 220 - 240 V. If not, replace connectors CN27 and CN28 on the TF
transformers in the electrical box.
Follow the steps below to connect the remote control cable or the optional extension wire:
1
Pass the cable through the knock-out hole in the cabinet.
2 Connect the cable to terminals A and B of the terminal strip (TB2).
3 Tighten the screw on terminals A and B.
4
Check that the cables are correctly secured.
Connector for 240V
Connector for 220V
Follow the steps below to connect the power cables to the terminal strip (TB1):
1 Where necessary, loosen the screws on terminals L1 and N on the terminal strip (TB1)
2 Connect the power cables to terminals L1 and N.
3 Tighten the screws on terminals L1 and N.
4
Check that the cables are correctly secured.
