Reference Designation
(7) Blue
(8) Maximum fuse
(9) Setting
(10) Motor dryer
(11) Dryer
(12) Black
(13) Green
(14) Electronic drain or purge solenoid
Electrical installation
The electrical installation must be carried out by an electrician and must correspond to the local codes.
The indications on the motor data plate must correspond to the mains supply voltage and frequency. The
voltage may deviate not more than 6%. Protect the unit against short circuits by a fuse of suitable size in each
phase, see section Settings for overload relay and fuses.
Provide an isolating switch nearby the compressor.
On single-phase units, the overload protection is integrated in the motor and resets automatically.
On three-phase units, check the fuses and the setting of the overload relay. See section Settings for overload
relay and fuses.
For single-phase units, connect an electrical cable to terminals 1-3 and the earth terminal of pressure switch
(MDR4). See section Settings for overload relay and fuses for the correct setting.
For three-phase units, connect an electrical cable to terminals 1-3-5 and the earth terminal of pressure switch
(MDR3). An overload protection is integrated in the pressure switch. See section Settings for overload relay
and fuses for the correct setting.
Never operate the unit without the earth conductor being connected.
Instruction book
30 2920 7002 03
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