STIEBEL ELTRON Accelera 220 E Operation And Installation Manual page 21

INSTALLATION
Installation
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
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
X0/2.
In the delivered status, terminal X0/2 is not assigned. If this ter-
minal is connected to 240 V AC, the appliance activates set tem-
perature 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 X0/2, do not interchange
phase and neutral.
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Example 1: Power-OFF signal with own 240 V AC phase
Example 2: Photo-voltaic signal via on-site relay and phase
routed outside the appliance
X0
PE
1 Inverter (fl oating contact)
PE
The inverter power feed is located at a central distribution point
N
(e.g. in the main fuse box).
N
L Connection to terminal block X0
 Remove the appliance cover (See 14.1, "Removing the appli- 
L
2 ance cover", pg. 23).
1
1
1 Terminal X0
 Prepare the leads for connection to X0 in such a manner that 
each lead terminating at X0 has a wire ferrule.
 Route leads through the strain relief. 
Note
 Never wire up terminal X0/1. 
PE
N
L1
EVU:
L1, L2 oder L3
PE
N
L1
1
Accelera® 220-300 E |
X0
PE
PE
N
N
L
L
2
1
X0
PE
PE
N
N
L
L
2
1
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