Unit installation

Use and Maintenance Manual Air-cooled water chillers and Heat Pumps R-PAE/R-PAH/EAH Rev. 1 del 03/09
4.6 Electric connections
Check the electric circuits have not been damaged during transportation. Check all terminals screws are tight. Make sure
the power tension and frequency match the same data as specified on the unit identification tag.
Before starting the electric connection, it is advisable to check the wiring diagram contained in the unit
electric panel.
4.6.1 Power supply connection
The unit can be powered with a 5-pole cable (3 poles+N+ T), if the power supply tension is 400V/3F/50Hz. In case the
power supply tension is 230V/3F/50Hz, the supply cable is a 3-pole cable. On demand, it is possible to supply units
with arrangements for special power supply tension (check the identification tag and the wiring diagram).
Connect the phases and the neutral to the terminals of the main switch and the earth wire to its corresponding
terminal.Use a power supply cable of adequate cross section and of moderate length to avoid voltage drops.
Protect the power supply cable by means of an automatic switch of appropriate size and features.
For the cross section of the power supply cable, the size of the automatic switch and the
characteristics of the electric components, check the wiring diagram attached to the present
manual.
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