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To insert the storage blocks (8), the heating
elements (E5) must be slightly raised. The first
storage block with the heating element trough
is laid facing upwards, with a certain amount
of space between it and the right-hand ther-
mal insulation, beneath the heating element,
and is pushed onto the right and rear thermal
insulation. The longitudinal holes form the
heating channels.
When raising the heating elements, take care
to ensure that the transition holes in the side
thermal insulation are not made wider due to
the heating elements.
Finally, slide the cover plate (9), drawn out of
the interior, over the upper storage blocks.
2.5.2 Electrical connection
The electrical connection for the heating
elements can be provided with 400 V three-
phase current (Y) or AC, 30 V 50 Hz.
Connection with NYM is possible. The
number of leads and lead cores, and the lead
cross-sections, are dependent on the con-
nection value of the appliance and the type
of mains connection, as well as on the special
provisions issued by the electricity utility com-
pany. 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 con-
nection work.
During the charging period, a voltage
(230 V) must pertain at the „L" termi-
nal of the terminal block X2.
If there is no separate voltage supply avail-
able 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 temperature
regulators).
It is essential to ensure that the pro-
tective conductor is correctly con-
nected.
Before being connected, the lead to
the connection of a DC control de-
vice is to be encased in an insulating sleeve
from the stress-relief point as far as the
connection terminal.
Connection diagram . . .
. . . with integrated room temperature regulators RTI-E3/RTI-EP2
X3
+
-
TA
LE`
LH
LH`
LE
N
N
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
N
N
+
-
LE`
LH
LH`
LE
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
X2
(N)
L-
L
LE
A1
A2
N
N
N
N
L
SH
Z1
Z2
AC
Charging control
230V system
X2
(N)
L-
LE
A1
A2
L
N
N
N
N
L
SH
Z1
Z2
AC
Charging control
230V system
(N)
A1
A2
L
N
LE
Z1
Z2
1/N/PE
230V
(N)
L
LE
A1
A2
N
Z1
Z2
"Single-wire
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
1
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