Checking The Voltage Of The Auxiliary Circuit Transformer; Main Control Board; Description Of The Terminal Block And Connections (Functions And Electrical Specifications) - Carel heaterSteam User Manual

7.2 Checking the voltage of the auxiliary circuit transformer

The multi-voltage toroidal transformer for the auxiliary circuits has four
primary windings (for the voltages: 200-208V, 230V, 400V, 440-460V)
and one secondary winding (24V).
The connection is made and checked in the factory, according to the
voltage shown on the specification plate.
In the event of a change in the voltage of the power supply or
intervention on the electrical panel, before powering the appliance, check
the exactness of the connection (check wiring diagram).
The transformer primary is protected by 10.3 x 38mm cylindrical fuses, calibrated as indicated in Table 14.3.6.1.

7.3 Main control board

The auxiliary connections, depending on the chosen model and the
control module, must be made by introducing the external cables into
the electrical panel. For this purpose use the smaller fairlead on the
base of the machine, passing the cables through the raceway on the
internal partition to the removable screw terminals placed on the main
control board, as shown in Fig. 7.3.1 and described in the following
paragraph.
terminal block G (dehumidification
remote manual DRAIN command terminal block
Description of the terminal block and connections
7.4
Before connecting the probes or the external regulator, set parameters A2 and A6 according to the
command signal (see THE HUMIDIFIER CONTROLLER)
terminal
1I supply probe input signal
2I
3I
12Vdc stabilised
4I
5I ambient probe input signal
or signal from external regulator
6I
7I
8I
1H NO alarm contact
common alarm contact
2H
3H NC alarm contact
1G NO dehumidification contact
2G common dehumidification contact
1J
2J
3J
4J
1K remote control terminal block button switch
for DRAIN command with simultaneous
2K
3K disconnection of the power supply
Carel code +030221761
terminal block H (alarm contact)
terminal block J (to remote terminal or supervisory
function
input impedance: 50
GND
32Vdc
input impedance: 50
GND
remote
enabling
32Vdc
L +
L -
GND
IN P U T P R IM A R Y
4 4 0 - 4 6 0 V - y e llo w
4 0 0 V - b l u e
2 0 0 - 2 0 8 V - b la c k
0 - w h ite
terminal block I (control signals)
system)
(functions and electrical specifications)
electrical specifications
if programmed for 0 20mA or 4 20mA
60 k if programmed for 0 1V or 0 10V or 2 10V
derived from rectifying of 24Vac; max 250mA
accuracy 5%; Imax=50mA
if programmed for 0 20mA or 4 20mA
60 k if programmed for 0 1V or 0 10V or 2 10V
Rmax=50 ; Vmax=24Vdc; Imax=10mAdc
250V; 8 A with resistive load; 2A with indicative load
250V; 8 A with resistive load; 2A with indicative load
derived from rectifying of 24Vac; max 250mA
14
Fig. 7.2.1
standard RS-485
NC contact
common contact
NO contact
preliminary version - rel. 2.0 - 03/09/99
heaterSteam
S E C O N D A R Y
2 4 V - r e d
0 - r e d
Tab. 7.4.1