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Carrier
11
6.1 Cleaning the unit
Carefully clean the unit with detergents or degreasing substances, removing dust, dirt
and any foreign matter that may have deposited on it during transportation.
CAUTION!
Do not use solvents
6.2 Connecting the unit to external
6.2.1 Power mains connection
energy sources
Before making the electrical connection, ensure that the voltage and frequency of
the mains supply are as indicated on the unit’s serial plate and that the power
supply is /- 10% of nominal value
Having conducted a preliminary inspection of the elements of the panel, make the
electrical connection. Connection to the mains supply must be made through a
magnetothermal or fused switch.
Safety devices (magnetothermal and/or fused switches ) should be installed on the
power supply line taking into account the current absorption indicated on the plate.
For instance:
Current absorption indicated on the plate:
Operating current
12KW - 28,5 A
Maximum current
40 A
Starting absorption
134A
In this case, a 40A magnetothermal switch with a “C” curve (CEI 23.3 IV -EN 60-
898) should be installed. Alternatively, an appropriately sized fused switch should
be used for the maximum 40A current, which should also be capable of withstan-
ding a 134A starting current without being tripped. The system must be fitted with
an adequate equipotential safety circuit (earth connection).
It is also advisable to install a differential switch at source.
Follow the diagram below to make the electrical connection correctly for CU-O :
Id
Esempio con
CON FUSIBILI
INTERRUTTORE
N
L3
L2
L1
400V 3~ N 50Hz
Id
4
2
N
5
3
1
N
6
MAGNETOTERMICO
Esempio con
400V 3~ N 50Hz
INT.
DIFFERENZIALE
INTERRUTTORE GENERALE
INT.
DIFFERENZIALE
INTERRUTTORE GENERALE
N
L3
L2
L1
UNITÀ CONDENSANTE
GB
Id
Esempio con
CON FUSIBILI
INTERRUTTORE
N
L3
L2
L1
400V 3~ N 50Hz
Id
4
2
N
5
3
1
N
6
MAGNETOTERMICO
Esempio con
400V 3~ N 50Hz
INT.
DIFFERENZIALE
INTERRUTTORE GENERALE
INT.
DIFFERENZIALE
INTERRUTTORE GENERALE
N
L3
L2
L1
UNITÀ CONDENSANTE
CONDENSER UNIT
Ex: MAGNETOTHERMAL
SWITCH
Ex.: FUSED SWITCH
MAINS SWITCH
DIFFERENTIAL SWITCH
MAINS SWITCH
DIFFERENTIAL SWITCH
fig.8