Carel heaterSteam, User Manual

Page: 18 / 88

18
ENG
“heaterSteam” +0300080EN - rel. 1.0 - 27.04.2016
4. ELECTRICAL CONNECTIONS
4.1 Wiring provisions
Models UR002-UR013
Outside, bottom view Inside, top view
3
1
1
3
Fig. 4.a Fig. 4.b
Models UR20-UR80
Outside, side view
1
3
2
Fig. 4.c
Key:
1. power supply cable inlet;
2.
inlet (after removing the knock-out) for other uses;
3.
probe cables inlet (after removing the knock-outs).
4.2 Power cable connection
Before making the connections, make that the unit is disconnected from
the mains power supply: move the main system switch and humidifi er
switch to OFF).
Important: the humidifi er ON/OFF switch disconnects power
only to the electronic controller, and not the other devices, which
therefore remain powered.
Check that the unit’s power supply voltage corresponds to the rated value
shown inside the electrical panel. Remove the front panel as explained in
chap. 1.
To enter the power and probe cables, see the follow the procedures
described below:
Models UR002-UR013
1.
unscrew the screws and remove the cover (A);
2. if necessary, cut the top part of the conical cable gland (B) and insert
the power cable;
3.
connect the electrical wires to the terminal block, reposition the
cover and fasten it using the screws;
To attach the probe cable:
4.
remove the knock-out (C) and unscrew the screws;
5. insert the probe cable through the opening created: then fasten the
cable using the screws.
A
B
1
2
GND
L N
3
Fig. 4.d Fig. 4.e
GND
L N
C
4
GND
L
N
5
Fig. 4.f Fig. 4.g
Models UR020-UR080
1.
identify the rubber cable gland (A) on the right side of the unit and
insert the power cable;
2.
inside the electrical panel: unscrew the cable gland (B), connect the
wires to the terminal block and tighten the screws again to fasten
the cable.
GND
L1 L2 L3 B
A
Fig. 4.h
The humidifi er power line must be fi tted by the installer with a disconnect
switch and fuses to protect against short circuits. The table shows the
recommended sizes of the cable and fuses; nonetheless, these data are
purely indicative and, if diff erent from local standards in force, the latter
must prevail.
Note : to avoid unwanted interference, the power cables should
be kept separate from the probe signal cables.
Important: connect the yellow-green wire to the earth terminal
(GND).