Installation Guide

24 | Accelera® 220-300 E www.stiebel-eltron-usa.com
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.
BK 1
BK 2
GRN
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
L
GRN
BK 1
BK 2
L
L
Interruptible
power supply
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.
GND
L
L
GRN
BK 1
BK 2
N
L