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3. Fix the indoor unit at the bottom side using the
4 screws which had been previously removed during
the unpacking procedure.
6.5.2 Power and transmission wiring connection
‹ Safety instructions
NOTE
Check the requirements and recommendations in the chapter
"5. Electrical and control settings".
!
DANGER
• Do not connect the power supply to the indoor unit prior to
filling the space heating circuit (and DHW circuit if it were the
case) with water and checking water pressure and the total
absence of any water leakage.
• Do not connect or adjust any wiring or connections unless the
main power switch is OFF.
• When using more than one power source, check and ensure
that all of them are turned OFF before operating the indoor
unit.
• Avoid wiring installation in contact with the refrigerant pipes,
water pipes, edges of plates and electrical components inside
the unit to prevent damage, which may cause electric shock or
short circuit.
!
CAUTION
• Use a dedicated power circuit for the indoor unit. Do not use
a power circuit shared with the outdoor unit or any other
appliance.
• Make sure that all wiring and protection devices are properly
selected, connected, identified and fixed to the correspond ing
terminals of the unit, specially the protection (earth) and power
wiring, taking into account the applicable national and local
regulations. Establish proper earthing; Incomplete earthing may
cause electrical shock.
• Protect the indoor unit against the entry of small animals (like
rodents) which could damage the drain pipe and any internal
wire or any other electrical part, leading to electric shock or
short-circuit.
• Keep a distance between each wiring terminal and attach
insulation tape or sleeve as shown in the figure.
Tape or sleeve
PMML0666 rev.0 - 09/2024 - 1000017439
‹ Connection procedure
Access to the electrical box before performing the next
steps:
1. Using the appropriate cable, connect the power circuit
to the appropriate terminals as shown on the wiring
label and the illustration below. Connect the power
supply cables to the terminal board (TB1) , and the
earth conductor to the earth screw in the electrical
box plate.
Terminal Board 1 (TB1)
Power terminals
Power terminals
Case 1. Power supply:
~ 230V 50Hz (*)
(*) For a ~230 V power supply, use the power connection
bridge provided in the accessory bag, following these
instructions:
2. Connect the transmission wires between outdoor and
indoor unit to the terminals 1 and 2 on the terminal
board 2 (TB2).
1
2
Indoor unit
Outdoor unit
1
2
3. Carry out the necessary electrical connections of the
optional accessories using the terminal board 2 (TB2).
Consult its label for a better understanding.
4. Pass the electrical wiring from the TB1 and TB2 to the
lateral holes of the electrical box. Then, fix the cables
to the cord bands located at the right side. Finally,
take the cables out through the bottom side of the
unit.
Earth terminal
Case 2. Power supply:
3N~ 400V 50Hz
EN
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