Wiring Diagram - Stiebel Eltron ETW 120 Plus Utilisation Et Installation

INsTALLATIoN
Specification

19.2 Wiring diagram

Material losses
Ensure that the differential in potential between connections L, L1 on the mains power side and the various control signals SL,
A1, A2, LF, SH, LE and LH does not exceed 230 V.
Booster heater
Control
external (LH)
*1
X4
LH N
E8
N2
N3
N5
M1
M2
M3
Storage component
A1 Electronic charge/discharge controller
A2 User interface PCB
B1 Core sensor – charge
B2 Room temperature sensor – discharge
F1 High limit safety cut-out
E1 - E6 Heating element
M1 - M3 Storage heater fan
N4 Temperature limiter – charge
N5 Protective temperature controller
N6 Temperature limiter – charging level
only for 3.0 - 4.8 kW
X25 Internal connecting lead A1 - A2
X1 Mains terminal
X2 Terminal
50 | ETW 120-480 Plus
Fan
Control Charge control system
external (LE) 230 V system
1/N/PE ~ 230V
L L L N N N SL LE
L N SL LE
X 11
A2
X 9
X 9 X 9
X25
A1
A2
X3
3 4
Z1 Z2
-
+
DC
Charge control system
LV system
AC
E 5
E 3
E 1
A1 A2 LF
X2
Z1 Z2 SH
F1
R1
R2
R3
A1A2 LF/SH
X 12
A1
K2
K1
X 13 X 15 X 18
X10.3 X10.2 X10.1
B1
B2
N 6
N 4
A3
Accessories
(Not part of the standard delivery. Tick the boxes to show the
accessories installed.)
DC connection
X3 Terminal (0.91 - 1.43 V)
Booster heater (internally controlled)
*1 / wire LH - L
Booster heater (externally controlled)
A3 Booster heater assembly relay
E8 Booster heater element
N2 Temperature controller - booster heater
N3 Temperature controller - booster heater
X4 Terminal
E 6
E 4
E 2
L3 L2 L1
ws br vi
L3 L2 L1
K3
X 17
X1
L3 L2 L1 3 2 1
3/N/PE ~ 400V
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