STIEBEL ELTRON Accelera 300 E - Manual (Page 20)

20 | Accelera® 220-300 E www.stiebel-eltron-usa.com
INSTALLATION
Installation
10.3 Power supply
WARNING Electrocution
Carry out all electrical connection and installation work
in accordance with national and regional regulations.
WARNING Electrocution
If the appliance is permanently connected to the power
supply, ensure that the appliance can be separated from
the power supply by an isolator that disconnects double
terminal with at least
1/8˝ /4 mm contact gap. Contactors,
disconnect switches or circuit breakers can be used for
this.
WARNING Electrocution
  Observe the safety regulations to prevent contact
with dangerous 'live' parts.
WARNING Electrocution
Coming into contact with 'live' components presents a
threat to life. Disconnect the appliance from the power
supply before carrying out work on the control panel.
Prevent the power supply from being switched on while
you are working on the system.
WARNING Electrocution
Insuffi cient grounding can lead to electrocution. Ensure
the appliance is grounded according to locally applicable
requirements.
WARNING Electrocution
The power cable must only be replaced (for example if
damaged) with an original spare part by a qualifi ed con-
tractor authorized by the manufacturer. For an original
spare part contact Stiebel Eltron 800-582-8423 for part
number 315650.
!
Material losses
The voltage to the appliance must match the voltage spec-
ifi ed on the type plate .
!
Material losses
Never connect the appliance to the power supply before
the DHW tank is fi lled.
Standard connection without external signal transmitter
X0
PE
PE
N
N
L1
L1
LF
FB
D00000
34
4
87
10.3.1 Connection with external signal transmitter
An external potential free signal transmitter for controlling DHW
temperature (set temperature 2) can be connected to terminal
X0/LF.
In the delivered status, terminal X0/LF is not assigned. If this
terminal is connected to 240 V AC, the appliance activates set
temperature 2.
Following a one-off activation (the external signal is present for at
least one minute), set temperature 2 applies for at least 20 min-
utes.
!
Material losses
If the 240 V AC signal of an external signal transmitter
is to be connected to terminal X0/LF, do not interchange
phase and neutral.
Note
  Never wire up terminal X0/FB.
Example 1: Power-OFF signal with own 240 V AC phase
X0
FB
LF
L1
L1
N
N
PE
PE
L1
L1, L2 oder L3
N
PE
EVU:
D00000
34
5
89
Example 2: Photo-voltaic signal via on-site relay and phase
routed outside the appliance
X0
FB
LF
L1
L1
N
N
PE
PE
L1
N
PE
1
D00000
34
59
0
1 Inverter (fl oating contact)
The inverter power feed is located at a central distribution point
(e.g. in the main fuse box).