75
Fig. 39 Connection of AC/PM motor - star and triangle
9. For fans with PM motors, check the winding connection
according to Fig. 39 and when selecting Eura Drives’ E800
frequency converter for their power supply, congure it ac-
cording to Table 10.
10. Check the electrical installation for any breakage. Check
the motors’ rotations.
11. Start-up of the air handling unit consists in connecting
one or three-phase motors powering the fan to the power
supply.
12. Check the current consumption of the motor powering
the fan.
13. In air handling units with secondary ltering sections,
it is advisable to perform a test start-up of the air handling
unit without secondary lter inserts.
14. After the adjustment, the air handling unit may be star-
ted only when the door of the fan block is closed. Please
follow the recommendations of section 8.
Fig. 40 Electrical connection diagram of a 1-phase EC fan
Fig. 41 Electrical connection diagram of a 3-phase EC fan
Table 8 Description of the connection diagram for EC fans
Connec-
tor no.
PIN 1-phase 3-phase Intake function outlet function
KL 1 1 L1 L1
Power supply cable
phase
Power supply cable
phase L1
KL 1 2 L2 N
Power supply cable
neutral
Power supply cable
phase L2
KL 1 3 L3 - -
Power supply cable
phase L3
PE
PE
Protective earth
KL 2 1
NO
KL 2 2
COM
State ralay: break with error max 250V / 2 A,
min. 10 mA;
KL 2 3
NC
KL 3 1 RSA RS485 interface for Modbus, RSA
KL 3 2 RSB RS485 interface for Modbus, RSB
KL 3 3 GND Reference ground for control interface
KL 3 4 Ain 1 U
Analogue input 1 (set value); 0÷10 V;
Ri=100kΩ, only useable as an alternative to
input Ain1 I
KL 3 5 +10V
Constant power supply+ 10 V +/-3%; max.
10 mA, power supply for external devices, e.g.
potentiometer
KL 3 6 Ain 1 I
Analogue input 1 (set value); 4-20 mA;
Ri= 100 Ohm, only useable as an alternative
to input Ain1 U
Starting the unit with an unadjusted installa-
tion must be done with the air intake damper
closed and with the fan block door closed.
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