INS-99
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
Electrical work must be carried out by Authorized Technical Service, that works in accordance with
current national and local regulations.
1. Power supply line must be for system only. A circuit breaker must be installed which interrupts all
contacts (in opening position, min. distance between contacts must be of 3 mm) of suitable calibration as
regards power input of system. Installation of an earth breaker is required, specific for Inverter appliances.
2. Ground wire and neutral wire of power supply line must be kept separated.
3. Only use copper wires of suitable section and cables in accordance with to law.
4. There must be a perfect correspondence between wiring and refrigerant piping connections of all
Indoor Units (“A”, “B”, “C”, “D”) as regards Outdoor Unit.
5. Power supply specifications are the following: 1-Phase, 220~240V, 50 Hz.
6. If a protection fuse is damaged, please replace it by an original one or by an equivalent. But first of
all try to find the reasons that caused the damaging of fuse.
7. Min. recommended sections of cables are the following:
a) Power supply of Outdoor Unit: 2 Ground wire. Concerning min. recommended sections
of cables for each Model, see the corresponding Table at the following pages.
b) Connection lines (pre-wiring) between each Indoor Unit and the Outdoor Unit: 3 wires + Ground
wire with “plug”. Min. section: 1.5mm
2
for all Models.
8. To reach Outdoor Unit’s terminal block, please remove protection cover (fixed by screws) on right side
of Outdoor Unit and/or frontal service panel. Before inserting wiring inside of Outdoor Unit’s electrical
box, please bend wiring downwards (“U”); this precautions allows to prevent infiltrations of rainwater
inside of box itself.
9. Firmly fix wires on screw terminal blocks, and always use the special wire clamps to prevent eventual
tractions to be transmitted to terminal blocks’ contacts.
4.7.23 Wiring
Access to terminal blocks, connections of terminals and use of wire clamps
Grommet terminals
Example: HCKU 406 X2
Example: HCKU 816 X4
Protection cover
of terminal block.
1 2(N)
CORRECT
Wire clamp
1 2(N)
WRONG
Wire clamp
Service panel to
be removed to
reach the terminal
block.
Note:
always observe the
correspondence between
wiring and refrigerant piping
connections for each
Indoor Unit.
