19
Installation
Connections in SINGLESplit configuration
Morsettiera unità INTERNA
alla morsettiera
dell’unità ESTERNA
segnale alimentazione
W
S
1(L) 2(N)
INDOOR unit terminal block
power supplysignal
to the terminal block of 
the OUTDOOR unit
Fig. 14 
Connections in MULTISplit configuration
Morsettiera unità INTERNA
alla morsettiera
dell’unità ESTERNA
segnalealimentazione
W
S
1(L) 2(N)
Morsettiera unità INTERNA
power supply signal
to the terminal block of 
the OUTDOOR unit
Fig. 15 
2.4.7  Wrap the pipes and cables
It is necessary to wrap the coolant pipes, drainage pipe 
and electrical cables together; this reduces the space 
occupied, protects them and insulates them before 
passing them through the hole in the wall.
1  Assemble the drainage pipe, coolant pipes and cables 
as indicated in “Fig. 16”.
Indoor unit
the unit
Refrigerant 
piping
Insulating 
tape
Electric 
cables
Drainage 
pipe
Fig. 16 
m
CAUTION
– Make sure that the drainage pipe is on the 
lower part of the unit. Placement of the 
drainage pipe at the top of the unit may 
cause the drain pan to overflow, which may 
result in fire or water damage.
– When winding the pipes and cables, leave 
the ends of the pipes free. These should be 
accessible to check for leaks after installation 
is complete (see section “3.2 Electrical 
dispersion and gas leakage control”  of the 
outdoor unit manual).
– When assembling cables, avoid twisting or 
tangling the signal cable with other types 
of cable.
2  Using vinyl adhesive tape, fasten the drain pipe to the 
bottom side of the coolant pipes.
3  Using insulating tape, wrap the electrical cables, 
coolant pipes and drainage pipe together. Check that 
all components are joined together as indicated in 
“Fig. 16”