Unit installation

Use and Maintenance Manual Air-cooled water chillers and Heat Pumps R-PAE/R-PAH/EAH Rev. 1 del 03/09
4.6.4 Instructions for the electric connection
The electric connection must be carried out by skilled personnel. The power cable input is shown in the attached
dimensional scheme.
Picture 36
The power cable conductors must be connected to the free terminals upstream the main disconnecting switch, while
the grounding conductor must be connected to the appropriate terminal PE or to the ground bar.
On the lateral side of the unit, a hole must be performed to introduce the electric power cable and to arrange its
corresponding cable connection.
Picture 37 Picture 38
If the power cable comes from the top wiring box, perform a bend on the cable (Picture 38)
before plugging it into the cable connection as illustrated in the example on the top on the right.
If the water circulating pump is not controlled by the unit microprocessor, it is recommended to connect an auxiliary
contact of the pump electromagnetic switch to the remote ON/OFF terminals preset in the electrical panel (see
attached wiring diagram), so that the unit can start only when the pump is working.
On its cover, the electrical board has the programming panel of the unit microprocessor. For the controls
management, its functions and for the microprocessor use, see Chapter 8 “Unit control and start-up” of the present
manual.
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