CONNECTIONS
24
Electrical connections
The electrical wirings must be carried out by qualified person-
nel according to the regulations in force at the installation time
in the country of installation. Before starting any work on the
electrical circuit make sure that the unit power supply line is
disconnected at the start.
N.B.
Refer to the electrical diagram enclosed in the unit.
Power supply system
The power cables of the heat pump power supply line must be
connected to :
-
for
single phase
power supply : from a single phase vol-
tage system provided with neutral conductor and sepa-
rated earth wire :
V = 230 V ± 10 %
f = 50 Hz
-
for
three phase
power supply : from a symmetrical three
phase voltage system provided with neutral conductor
and separated earth wire :
V = 400 V ± 10 %
f = 50 Hz
The units are shipped completely factory wired and arranged
for the connection to the power supply.
The power cables must enter the unit through the holes on the
rear panel and must be connected to the power supply termi-
nals of the unit.
The integrative electrical heaters (option) must be supplied by
a dedicated power supply line to be connected to the power
supply terminals inside the electrical board of the unit.
Heat pump power supply
The power supply cables must have an adequate section for
the power absorbed by the unit and must be chosen in con-
formity with the regulations in force. Design the power supply
line, always referring to the total FLI and FLA values of the
unit, taking into account the selected options (except the inte-
grative electrical heaters) and the installed accessories.
Integrative electrical heaters power supply
The power supply cables must have an adequate section for
the power absorbed by the only integrative electrical heaters
and must be chosen in conformity with the regulations in force.
It is possible to connect the integrative electrical heaters either
to a single phase power supply or to a three phase power
supply.
If a three phase power supply is used, connecting to the ter-
minal R the same phase used to supply the heat pump, the
maximum absorbed current for each phase never exceeds
16A.
Upstream protection
An automatic switch suitable for ensuring protection against
overcurrents and indirect contacts must be installed upstream
each power supply line.
Coordination between line switch must be carried out obser-
ving the regulations in force on electrical safety, regarding the
type of installation and the installation ambient conditions.
Connection available for the user
The electrical board of the heat pump contains some terminals
dedicated to the connection of temperature probes, humidity
probes, pumps, valves ...
Carry out all the necessary connections in order to realize the
desired plant following the instructions reported in the section
“Inputs and outputs”.
ATTENTION
Carry out all the connections outside the heat pump avoiding
the power cables and the probe cables to be coupled.
N1 R
S
T
L
N PE
N
L
L
N PE
N1 R
S
T
L
N PE
N
L1 L2 L3
L1
N PE
Heat pump
Integrative
electrical heaters
Heat pump
Integrative
electrical heaters
Integrative electrical heaters connection
with
three phase
power supply
Integrative electrical heaters connection
with
single phase
power supply
Summary of Contents for HSW 11.1
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