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Electrical connections
8. Electrical connections
8.1 Prerequisites
This section is intended exclusively for the Installer.
Follow the safety instructions in the "About R-290 refrige-
rant" a pag. 8.
The electrical system and its components must be desi-
gned by a qualied technician who must work according
to the rules of good practice and national regulations.
All electrical operations should be performed by trai-
ned personnel having the necessary requirements by
the regulations in force and being informed about the
risks relevant to these activities.
Operate in compliance with safety regulations in force.
The power cables and the protection cable section
must be defined in accordance with the characteristics
of the protections adopted.
The protection devices of the unit power line must
be able to stop the presumed short circuit current,
whose value must be determined in function of system
features.
Refer to the unit electrical diagram (the number of the
diagram is shown on the serial number label).
verify that the network has characteristics conforming
to the data shown on the serial number label.
Before starting work, verify that the sectioning device
at the start of the unit power line is open, blocked and
equipped with cartel warning.
The supply line must be disconnectable from the rest
of the building’s power mains with an all-pole magne-
tothermic circuit breaker
with separation of contacts on
all poles, to be implemented in accordance with current
laws and regulations.
The protection must be sized in accordance with the
electrical data declared by the manufacturer.
Disconnect the power supply before making any
connections and wait 10 minutes so that the DC bus
condensers of the compressor inverter are correctly at
a low residual voltage.
Do not crush cable bundles and prevent them from
coming into contact with piping and any sharp edges.
Primarily you have to realize the earthing connection.
Incorrect grounding may cause electric shocks.
Install an earth leakage breaker (30 mA).
Failure to observe this precaution may result in electric
shocks.
Power and signal cables should be routed as separa-
tely as possible to avoid any interference.
For the electrical connection, use a cable of suffi-
cient length to cover the entire distance without any
connection work. Do not use extension cords. Do not
apply other loads on the power supply.
If the power cable is damaged, it must be replaced by
qualified personnel and in accordance with current
national regulations.
The manufacturer is not liable for any damage caused
by failure to install a grounding system or failure to
comply with the diagrams.
Check the voltage values which must be within the
limits: 220-240V +/- 10% and 380-415V +/- 6%.
Before power the unit, make sure that all the pro-
tections that were removed during the electrical con-
nection work have been restored.
It is forbidden to connect the earth wire to gas or wa-
ter pipes, lightning rods or telephone ground.
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