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Electrical installation
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Formato A3
FOGLIO 2
Centralina SATK II
SCALA
DISEGNATO: D.V.
FILE: G095_02A6
DATA: 07/12/2016
CODICE: CRAE030
FINITURA:
OGGETTO
MATERIALE:
REV.N.
REV. N. 1
GRADO RUGOSITA' SUPERFICI
RETTIFICA
PRESSOFUSIONE
PIALLATURA
TORNITURA
3-6
0,4-3
1,6-3
0,1-0,8
FUSI O STAMPATI
+/- 0,5%
+/- 2°
+/- 10%
LAVORATI
ANGOLI
0 - 80
> 80
+/- 30'
+/- 0,1
+/- 0,25
TOLLERANZA GENERALE
SPESSORE
LUNGH. O Ø
ANGOLI
VIETATA LA RIPRODUZIONE
NON RILEVARE LE QUOTE DAL DISEGNO
EXP PORT OTS
RT
PREPAID
AUX
RS-485 BUS
8
Connection to the electric supply
The appliance is supplied with an electric supply cable which is not fitted
with a plug.
The appliance should be electrically connected to a 230 V (AC) single-
phase + earth mains supply using the three-wire cable marked with the
label as specified aside, observing the LIVE (L) - NEUTRAL (N) polarities
and the earth connection. This line must be connected to a circuit breaker
device.
To extend the cable if necessary, use a flexible cable suitable for kitchen
and heating appliances and for home, kitchen and office installations, also
in humid environments subject to medium levels of mechanical stress (e.g.
H05V2V2-F: Uo/U 300/500 V). Cable minimum cross-section 3 x 0,75 mm
2
.
Make sure that the electrical system can withstand the maximum power
consumption of the appliance, with particular emphasis on the cross-
section of the wires. If you have any doubts, contact a qualified technician
to request a thorough check of the electrical system.
Electrical safety of the appliance is only achieved when it is correctly
connected to an effective earthing system, constructed as specified in
current safety regulations. This is a compulsory safety requirement.
Observe the applicable regulations in force in the country of installation.
Use the cable pathway provided, as shown in figure 1.
Optional electric connections
The controller has a door on the front providing access to terminal boards
for optional wiring (see chapter “circuit board details”). The connections in
question are all low voltage or potential-free. Any wiring must be directed
toward the exterior of the HIU, using the pathways provided in the insulation
and on the frame. All the low voltage lines must be routed through a single
dedicated cable raceway, using the pathway that is not used for the electric
supply cable (see figure 2), so that they are separate from the 230 V electric
cables. Any other high voltage connection, e.g. the one from the auxilliary
microswitch (see pages 13 and 16) must pass through the same cable
pathway used for the main electric supply.
Remote user interface connection
The HIU user interface has the dual function of control device and room
thermostat. The remote user interface can be installed on board the HIU
or in the room in a position where the temperature measurements will be
of significance for control of the heating function (in a heated room in a
position where the temperature read by the thermostat is not affected by
any nearby heat sources).
Installation on board the HIU
If the remote user interface is fitted in the dedicated location on the cover of
the HIU, the thermostat function must be disabled (in this case an external
thermostat must be used, as described in the next section). The adjacent
figures show how to install the remote control unit:
- Feed the cable from the regulator through the hole in the cover (3);
- Feed the cable from the regulator through the rear of the interface (4);
- Connect the two wires to the terminals on the electronic circuit board (the
cable is not polarised) (5);
- Close the interface and position it in its housing on the cover (6), (7);
- If necessary, secure the interface from inside the cover by means of the
supplied pair of self tapping screws, spacers, and washers;
- Plug in the connector (8).
The thermostat function is enabled by default (refer to the remote
control user manual for disabling it).
Installation in the room
Use the cable outlet provided for connection of the remote user interface
to the electronic circuit board.
The chrono-thermostat function has to be enabled through the remote
control. Refer to the dedicated user manual for the procedure.
Use of an external room thermostat
An external room thermostat, if installed, must necessarily be with
potential-free contact
.
The external thermostat has to be connected to the terminals “RT” shown
in the adjacent figure. The terminals can be accessed by removing the door
on the HIU electronic regulator (see page 19).
In case the thermostat function of the remote user interface is enabled,
any external thermostat will work in parallel (management of different
temperature zones). Alternatively, when the thermostat function of the
remote user interface is disabled, the interface can be used to define
the hourly programming of the space heating function for all thermostats
connected to the terminals “RT”.
Refer to the user interface dedicated manual.