STIEBEL ELTRON accelera 220 e Operation And Installation Manual page 24

INSTALLATION
Installation
11.4.1 Standard connection without external signal transmitter
The standard connection confi guration for this appliance utilizes
two load connections on terminals X0/L & X0/N with a ground
connection on X0/PE. This connection requires 1 - 15 Amp dou-
ble-pole Type C breaker.
In this confi guration, the appliance operates to satisfy the primary
setpoint.
GRN
BK 1
BK 2
11.4.2 Connection with off-peak power connection
The appliance can be connected to a separate 240 V connection
for a potential off-peak power source confi guration. To connect
this setup, two additional load connections must be wired to ter-
minals X0/2 & X0/1. The bridges between terminals X0/N & X0/2
and between X0/L & X0/1 must be removed.
The connection on terminals X0/N & X0/L is the main connection
for operation. The installer can set up to be interrupted by ex-
ternal means for use with a timer or off-peak operational setup.
The second load connection at terminals X0/2 & X0/1 serves only
to maintain corrosion protection via the electronically impressed
anode during power interruption of the primary connection.
GND
L
Interruptible
power supply
L
L
L
24 | Accelera® 220-300 E
GRN
BK 1
BK 2
11.4.3 Connection with external signal transmitter
The appliance can be connected to an external signal in addition
to the standard connection. Two wires with a 240 V potential must
be connected to terminals X3/2 & X3/1. The X3 connection does
not carry a signifi cant load, and only provides an on/off signal to
the appliance.
When this signal is active, the appliance will operate to satisfy
the secondary setpoint instead of the primary. See 5.2.5, "Set
temperature 2", pg. 13 for more information.
Following activation of the external signal (the external signal is
present for at least one minute), set temperature 2 activates for
at least 20 minutes.
GRN
GND
BK 1
L
BK 2
L
N
L
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