INS-43
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
5. Wiring
5.1 General cautions
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.
5.2 Access to terminal block of HFIU (266, 356, 536) X Indoor Units
Figure 5.2.1
Figure 5.2.2
1) Slide the two switches of frontal grille toward the middle, as it is shown in Figure 5.2.1.
2) Open frontal grille to 90°, after removing the string (see Figure 5.2.2). Remove the grid from Indoor Unit, by
detaching the bottom hinges. Unscrew the 4 screws of Indoor Unit’s frontal panel (see Figure 5.2.2).
3) Lift frontal panel by about 30° (see Figure 5.2.3 on the following page); now it is possible to remove it from
back side of Indoor Unit.
4) Rotate room temperature sensor holder (see Figure 5.2.4 on the following page), in order to remove electric
box cover. Then remove the cover itself, to reach Indoor Unit’s terminal block.
