Connect the three-phase power cables on terminals L1, L2, L3 and N of the TB1 -A- terminal board and connect the earth
wire to the screw-in terminal -B-. Use insulated terminals or heat-shrink covers.
D: harness lifter for fixing the transmission wiring (2 places).
Connect the communication cables on the terminals of the TB2 -C- of the PCB1:
• From the indoor units to the outdoor unit: terminals 1 and 2.
•
From the outdoor unit to the next outdoor unit in the same refrigerant cycle: terminals 3 and 4:
E: ø53 mm pre-drilled hole for power cables.
F: ø26 mm pre-drilled hole for communication cables.
G: Cord board (accessory) for fixing power supply wiring.
H: shielded twist pair cable.
N O T E
Completely seal the entrance to the duct using sealant, etc. to prevent water from entering.
Tighten the connection terminals as shown in the following table:
Size Tightening torque (Nm)
M4 (1.0–1.3)
M5 (2.0–2.4)
M6 (4.0–5.0)
M8 (9.0–11.0)
M10 (18.0–23.0)
¿ Connection of indoor units
Connect
each outdoor unit to a power supply line. Install an earth leakage breaker, fuse and circuit breaker for each outdoor
unit power line.
Connect each group of indoor units corresponding to an outdoor unit to a voltage supply line (maximum capacity for each
group of indoor units: 26 HP). Install an earth leakage breaker, fuse and circuit breaker for each group of indoor units.
Connect the communication cable between the indoor units, the CH units and the outdoor units.
4 Electrical wiring
75
SMGB0065 rev. 1 - 12/2010
4
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