INS-60
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
6. Wiring
6.1 General cautions
6.2 Access to terminal block of HSFU (356, 536) X Indoor Units
1) Position of Indoor Unit’s electric box is shown in Figure 6.2.1 below.
2) To reach electric box, first of all remove Indoor Unit’s air inlet grille.
3) Then unscrew the screws of electric box cover, to reach terminal blocks.
4) After completing wiring, carry out in the operations previously described in reversed order, by taking care that
air inlet grille is well closed. Air inlet grille must not accidentally open during Indoor Unit’s operation. This is very
important in case of ceiling installation of this kind of Indoor Units.
Figure 6.2.1
CORRECT
Wire clamp
Terminal blocks
Grommet terminals
WRONG
L
N
S
L
N
S
Position of Indoor Unit’s electric
box. To reach electric box, first
of all it is needed to remove
Indoor Unit’s air inlet grille.
Electric box
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.
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.