Stiebel Eltron ETW 120 Instrucciones De Uso Y Montaje página 21

Connection with NYM is possible. The number
of leads and lead cores, and the lead cross-
sections, are dependent on the connection
value of the appliance and the type of mains
connection, as well as on the special provisions
issued by the electricity utility company. Take
note of the relevant circuit diagrams.
If the appliance is connected to an
automatic charging control unit, there
is the possibility that voltage will still be
present at the terminals A1/Z1 and A2/Z2,
even if the fuses have been removed.
Connection
The electrical connection leads are to be
provided with stress-relief if appropriate, and
are to be connected in accordance with the
electrical circuit diagram in the appliance (on
the inside of the right-hand side wall) or in
accordance with the circuit diagram shown
opposite.
If the angle plate located in the switching
area for accommodating the network
connection terminals is only poorly accessible
due to too little lateral clearance, it can be
pivoted forwards after releasing (not
removing) the screw located in the rear wall
during the connection work.
During the charging period, a voltage
(230 V) must pertain at the „L" ter-
minal of the terminal block X2.
If there is no separate voltage supply
available for this purpose, the terminal „L1"
can be bridged with „L". In this case, the
terminal „N" of the terminal block X2 is
also to be bridged with the terminal „N" of
the terminal block X1 (only possible
with wall-mounted room tempera-
ture regulators).
It is essential to ensure that the
protective conductor is correctly
connected.
Before being connected, the lead to
the connection of a DC control
device is to be encased in an insulating
sleeve from the stress-relief point as far as
the connection terminal.
Actuation without heating contactor:
If it is not intended to install a heating
contactor (in part a requirement by the
electricity utility company), the thermal
relay installed at the factory can be used.
To do this, either the electricity utility
company „LF+N" signals or the „SH+N"
signals are to be connected directly to the
„L-SH+N" terminals of the heat storage
appliance. The references marked * in the
circuit diagram opposite are to be taken
into consideration in this respect.
The heating elements in the appliance will
not be switched on until LF clearance is
issued by the electricity utility company, and
the electronic charging regulator issues
clearance for charging.
Connection diagram . . .
. . . with integrated room temperature regulators RTI-E3/RTI-EP2
X3 TA LE` LH LH` LE N N
+ -
à
Remove bridges (L)-(L-SH) and (N)-(N)
when actuating without heating contactor
DC
Charging control
extra-bw voltage system
Charging control A1/A2
1/N 230V
L1/L2/L3
(if approbiate, by means of heating contactor)
N/PE 400V
. . . with wall-mounted room temperature regulators RTA-S/RTNZ-S
X3 TA LE` LH LH` LE N N
+
-
à
Remove bridges (L)-(L-SH) and (N)-(N)
when actuating without heating contactor
DC
Charging control
extra-bw voltage system
Charging control A1/A2
1/N 230V
RTA-S
(RTNZ-S)
L1/L2/L3
(if approbiate, by means of heating contactor)
N/PE 400V
. . . with single-phase connection
. . . with "old-new" heat storage unit replacement, with wall-mounted
room temperature regulators and daytime current supply absent
It is important that the room thermostat and
the weather sensing controller receive their
electrical supplies from the same protective
device that supplies the load.
When more than one supply is available the N
of the thermal relay must be connected to the
same N as the load, also wire 3 of connection
X10 should be moved from L to L1.
Charging control
Room temperature regulator
L1/L2/L3
(if approbiate, by means of heating contactor)
N/PE 400V
à à
X2
(N)
L-
A1 A2 LE
L N
N N N L
SH
Z1 Z2
AC
Charging control
230V system
à à
X2
(N)
L-
A1 A2 L LE
N
N N N L
SH
Z1 Z2
AC
Charging control
230V system
(N)
A1 A2 L LE
N
Z1 Z2
1/N/PE 230V
(N)
A1 A2 L LE
N
Z1 Z2
"Single-wire
à à
control"
X1
3 2 1 L3 L2 L1
X1
3 2 1 L3 L2 L1
X1
3 2 1 L3 L2 L1
X1
(N) (N)
(N)
3 2 1 L3 L2 L1
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