INS-78
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
Figure 7.2.1
L
N
S
L
N
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Position of Indoor Unit’s
electric box.
Electric box
7. Wiring
7.1 General cautions
7.2 Access to terminal block of HRBU (206, 266, 356, 536) X Indoor Units
1) Position of Indoor Unit’s electric box is shown in Figure 7.2.1 below.
2) It is possible to reach the electric box by Indoor Unit’s air inlet directly.
3) Unscrew the screws of electric box cover, to reach terminal blocks.
4) Connect power lines and signal line.
5) Connect LED Display and IR receiver by the special connector on cable’s end (standard lenght: 6m). Please
refer to wiring diangram of these Models, in “Section 2: Indoor Units” of this Service Manual.
1) Electric part of installation must be carried out in accordance with national and local current regulations as
far as electric installation are concerned.
2) These systems require one power supply line, specific to the system only.
3) Specifications of power supply voltage must correspond to plate specifications required by system.
4) The system requires Ground wire for Indoor and Outdoor Units.
5) Wiring must be carried out by Authorized Technical Service, in accordance with wiring diagrams on the
following pages.
6) Main power supply switch (circuit breaker) must be at open circuit, which determines all poles’
disconnection. In opening position, the distance between contacs must be at least of 3mm on each pole.
Always install an earth breaker on power supply lines; earth breaker must be specific for Inverter appliances.
Circuit breaker‘s calibration must be suitable to electric specifications of system.
7) Do not supply power to system before checking several times if wiring has been carried out properly on
terminal blocks/connectors of Indoor and Outdoor Units.
CORRECT
Wire clamp
Terminal blocks
Grommet terminals
WRONG
5) Always use wire clamps on Indoor Units, to avoid that any traction applied to connection cables between
Indoor and Outdoor Units could be transmitted to terminal blocks’ contacts or to connectors. For proper use of
wire clamps, please refer to the Figure below.