26
1.53
TOP unit heaters
Unit heaters (2-stage three-phase motor/1-stage AC single-phase motor/continuously variable EC single-phase motor)
Installation and operating instructions
9.3.3.1 Control with 0-10 VDC type ...33/34
EMC-compliant installation of control cables
To avoid interference, ensure that there is sufficient distance
between the mains power and control cables. Do not allow
the length of the control cables to exceed 30 metres, and
make sure that they are shielded above a length of 20 metres!
When using a shielded cable, make sure that the shield is just
connected on one side, i.e. only to the signal source with the
protective conductor (as short and induction-poor as possible!)
Voltage supply, actuation and fuses
All models require a power supply 230 V/50/60 Hz and can be
controlled via a control input 0-10 VDC (Ri > 49 KOhm). Types
45xx33, 46xx33 and 47xx33 can alternatively be operated via
an integral MODBUS RTU interface. The shield of the BUS cable
can also be wired through to terminal SH, if required.
The motor junction box contains a relay with a potential-free
changeover 24 to 250 V/ 2 A.
This reports a fault of the fan or power failure only for
types 45xx33, 46xx33 and 47xx33. In fault mode, the relay is
energised (Contact C – NO closed). In the event of a fault, the
relay becomes de-energised (Contact C - NO open). The fault
signalling chain is protected by a relay with a device fuse Ø5x20
mm, T0,1A.
There is no fault signal contact in fan types 44xx33, 44xx34 and
45xx34 and therefore no fan fault or power failure is reported!
Switch the unit on and off via the control input.
Do not switch the unit on and off via the mains power supply.
The 0 - 10 V control signal is interpreted with respect to its
speed according to the table (refer to table 8). Please refer to
the relevant type in the Technical Catalogue for the speed for
the 2 V control signal.
The speed can be limited to approx. 50% of the maximum
speed using the potentiometer in the connection box.
There is an option to enable the fan in unit heater types 45xx33
and 46xx33 via an external dry N/O contact for low voltage. To do
so, remove the factory-fitted bridge between terminals D1 and Ub.
Maximum on-site voltage supply fuse 16 A.
TOP with motor junction box
Fan connection side
e.g. type 45xx33 / 46xx33
Controller connection assignment
Unit heater with EC fan
Control signal
TOP speed
0 V
Aus
2.0 - 10 V
n
(2V)
-100%
Table 8
grid
230V / 50Hz
control
signal
fault message
contact
0-10V DC
*)Length of control signal
max. 100 m.
If length longer than 20
m please connect shield
one-sided onto the signal
source (PE).
Summary of Contents for Lufterhitzer TOP Series
Page 39: ......
