KOJA 0603, Instruction For Operation And Maintenance

Page: 40 / 52

AIR HANDLING UNIT FUTURE
INSTRUCTIONS FOR OPERATION AND MAINTENANCE
Fan section, motors and frequency converters
40 V. 2.0 2017-02-13
Fläkt EC / EBM EC
Potenometer
10 kohm
0...1V = stop
1...10V = min...max speed
Potenometer
10 kohm
0...1V = stop
1...10V = min...max speed
Relay 2A
AC 250V
KL2
M
3~
M
1~
KL3
- +
+ -
KL1
3x400V, 50Hz
Din
2
Din
3
GN
D
Ain2/U Ain2/1 Aout +20V
RS
A
Modbus RTU
RS-
485
ALAR
M
ALARM
Relay 2A
AC 250V
DC 0...10V
DC 0...10V
RS
B
GN
D
Ain1/U Ain1/1 Din1 +10V CO
M
NC PE
PE L1 L2 L3
1x230V, 50Hz
L N PE
PE
NO
CO
M
NO
L2 L3 L1
N PE L 0-10V GN
D
+10V
Fläkt EC / EBM EC
EC motor
The three-phase EC motors also have a Modbus RTU bus interface.
Digital input Din2 makes it possible to switch between two parameter settings. With the factory settings, both
parameter settings are the same.
Available as an accessory, the three-phase motors can be equipped with a voltage-controlled relay that can be
used to receive running information from the fan. The relay is connected to the control unit connectors GND,
+20V and Aout. The need for the relay has to be determined when ordering the fan, so that it can be included in
the delivery.
The current limits are 10 mA for the +10 V output and 40 mA for the +20 V output. Do not connect output con
-
nections of various devices with each other.
12.6. Connection of the Ziehl EC motor
The connection of the three- and one-phase models of the Ziehl Abegg EC motor is described in the figure Ziehl
motor . The connection depends on the motor size (B, D or G). The protection class of the motor and control
unit is IP54. Ziehl EC motors are ready-cabled. Check the motor supply voltage from the nameplate.
In all models, the speed set point is delivered between the connectors GND and E1 by a 0…10 V signal. The
speed set point can also be generated, using the motor’s own 10 V output.
The enable device input is delivered to connector D1 and generated, for example, using the contact from the
motor’s own 24 V or 10 V output. The motor will not start to rotate without the enable device input, even when
the speed set point exceeds the starting limit. The motor can be controlled on or off, using either the enable de -
vice input or the speed set point. The power supply should never be switched off; the motor heating activates
automatically when the temperature inside the control unit is –19 ˚C.