Hitachi RPI-4.0FSN4E - Page 158

4 Electrical wiring
146
SMGB0077 rev.0 - 01/2013
2 Connect the control cables between the indoor unit and the outdoor unit correctly. Check to ensure that the terminal for
power source cable (Terminals “L1” to “L1” and “N” to “N” of each terminal board: AC220-240V) between the indoor unit
and the outdoor unit coincide correctly. If not, some component will be damaged.
3 Use the shielded twist pair cable for control between the outdoor unit and the indoor units. They are connected to the
terminals 1 and 2 of the terminal boards. The remote control switch cable is connected to the terminals A and B of each
indoor unit terminal board.
4 When installing the unit in Australia, connect the both ends of shielded twist pair cable (remote control switch cable and
control cable) to the earth as shown below.
N O T E
• When the total wiring length for control cable between the outdoor unit and the indoor unit and between indoor
units is less than 100m, the normal wiring (more than 0.75mm
2
) except the twist pair cable is available. (except
for Australia)
• The total wiring length for the remote control switch can be extended up to 500m. If the total wiring length less
than 30m, the normal wiring (0.3mm
2
) except the twist pair cable is available. (except for Australia)
D A N G E R
• Tightlysecurewiringstotheterminalboardaccordingtothespeciedtorque.Iftighteningtheterminalsisnot
completed,heatgeneration,anelectricshockorarewilloccurattheterminalconnection.
• Makesurethatthewiresaresecurelyxedinordernottoapplyanexternalforcetotheterminalconnections
ofthewirings.Ifxingisnotcompleted,heatgenerationorarewilloccur.
• Fix the terminals that do not touch to the electrical box surface. If the terminals are closed to the surface, it may
causeactivationofELB,heatgenerationatterminalconnection,areoranelectricshock.
C A U T I O N
• Do not connect the main power source cables to the control line (Terminals A, B, 1 and 2 of TB2). If connected,
the printed circuit board (PCB) will be broken.
• Pay attention to followings when wires are connected to terminal board.
(A) Attach an insulation tape or a sleeve to each terminal.
(B) Maintain the distance between the electrical box and the terminals to prevent a short circuit.
(C) Maintain the distance between the terminals.
Earth
Earth
Shielded twist pair cable
Wires
Shield
(A)
(B)
(C)
Screw