Electrical And Tubes Installation - Electra DNC series Service Manual

INSTALLATION MANUAL
9.

Electrical and tubes installation

Make sure that the electrical cable connecting between the indoor and the outdoor units is of the
NYY type (triple insulation). Make sure and check that the cable is continuous and contains
grounding wires. The electrical connection to the outdoor unit will be made by means of a quick
connector provided with the unit. When installing the cable under the floor, it must be good
protective and isolated from any possible contact with water. It is obligatory to connect the feeding
cable through an automatic circuit breaker (Type C), with a time-delay, and with a ground-leakage
detection circuit breaker. The allowed voltage swing is 10%.
Note:
When there is a case of a duct system with large pressure losses, the high - speed connection of
the indoor unit motor must be modified, refer to wiring diagram.
•
Appropriate length of wires must be provided, to enable the lowering of electrical power
box.
•
In order to install a connecting cable and a communication cable between the units, the
electrical power box must be lowered.
•
The stages of lowering the electrical power box are:
1. Release two screws at the bottom of the box (see Fig. 27).
2. Lower the box (see Fig. 28).
3. If necessary, take the box out off the rail by removing the screw (see Fig. 29).
Fig. 27. Releasing screws at the bottom of the
box
Fig. 29. Taking the box off the rail
English 24
CONTENT
Fig. 28. Lowering the box