Daikin Modular Rotary, Instructions For Installation, Use And Maintenance Manual

Page: 37 / 64

37
9
Grounding
QS1
L1 L2 L3 N
10
Example of electrical connection
Additional warnings regarding the connection to the power supply:
It is necessary to install a suitable differential-type protection upstream of the machine's power supply
connection points, in order to be able to isolate each of its elements in the event of malfunctions; the
choice of the differential protection device must not be in conflict with the provisions of the law, the local
regulations, the characteristics of the plant’s electrical system and of the machine itself.
They are recommended, where not in contrast with local laws or system characteristics, differential switch-
es with adjustable current and trip time that cannot be affected by high frequency. The cables connecting
the various elements of the machine to the power supply must be shielded or must pass through metal
ducting, so as to reduce electromagnetic interference.
The shield or metal ducting must be earthed.
Once the system has been set up, the machine can be connected to the electricity supply network. The
actual supply voltage of the user devices must not deviate more than 10% from the expected normal volt-
age. Higher voltage differences cause damage to users and to the electrical system, malfunctioning of fans,
noise. It is therefore essential to check the compliance of the actual voltage values with the nominal values.
Before connecting the electrical panel, make sure that, during installation and maintenance, no other per-
son besides the one who is working has access to the electrical cabinets or switches.
After connecting, make sure that:
- The ground c
onnection is sufficient (using the appropriate tool). An incorrect connection, ineffective and lacking the grounding
circuit, is contrary to safety regulations and is a source of danger that can damage the components of the machine.
- The connections are correct and the current consumption of the motor is lower than indicated on the nameplate.
Size 01 ÷ 02
supply 230/1/50 (V-F-Hz)
Size 03 ÷ 10
supply 400/3/50 (V-F-Hz)
NB: Electric battery module power
supply always 400/3/50 (V-F-Hz)
separate from that of the unit.