Electrical Connection; Commissioning; Troubleshooting; Appliance Handover - Stiebel Eltron CNS 50 TREND Utilisation Et Installation

INSTALLATIoN

Commissioning

10.5 Electrical connection

WARNING Electrocution
- Carry out all electrical connection and installation
work in accordance with relevant regulations.
- In the case of a permanent connection, the appli-
ance must be able to be separated from the power
supply by an isolator that disconnects all poles with
at least 3 mm contact separation.
- Do not install the appliance with a fixed power
cable.
Note
- Observe the type plate. The specified voltage must
match the mains voltage.
- Ensure the on-site supply cable has an adequate
cross-section.
CNS 50-300 TREND
The appliance is delivered fully wired. The following electrical
connections are permissible:
Connection to a freely accessible standard socket
with matching plug
Permanent connection to an appliance junction box
with earth conductor
- If connecting the appliance via a socket, ensure that this is
easily accessible once the appliance has been installed.
- If connecting the appliance permanently, trim the power
cable so that it leads directly to the appliance connection
socket. Ensure that, after trimming the power cable, the
appliance can still be removed from the wall without a
problem.
CNS 50-300 TREND U
The appliance is delivered with a power cable without a plug.
f When wiring the appliance in permanently, connect the f
4-core cable to a connection socket as illustrated:
1 Neutral conductor = blue
2 Live = brown
3 Earth conductor = green/yellow
4 Control cable = black
There are 3 possible ways to connect the appliance:
- Appliance connection without control cable
Unregulated appliance. The control cable is not connected. In this
case, insulate the control cable.
www.stiebel-eltron.com
CNS 50-300 TREND
1 1
2 2
3 3
4 4
- Temperature setback via control cable
To reduce the temperature to the set setback temperature, the
black control cable is activated via an external electronic contact
(e.g. a time switch).
- Control cable connected to external control unit
The appliance can be connected to any control unit that issues the
following waveforms as control signals.
Instruction oscilloscope
No electrical
power
Complete oscil-
lation 230 V
Semi-oscillation
negative - 115 V
Semi-oscillation
positive + 115 V
Full oscillation
230 V for 3 sec-
onds
Full oscillation
230 V for 7 sec-
onds
X
11. Commissioning
X
The appliance is ready for operation as soon as it has been fixed
to the installation wall and plugged into the mains.
f Remove the protective film from the programming unit. f

12. Troubleshooting

The power cable must only be replaced (for example if damaged)
by a qualified contractor authorised by the manufacturer, using
an original spare part.

13. Appliance handover

Explain the functions of the appliance to the user. Draw special
attention to the safety instructions. Hand over the operating and
installation instructions to the user.
operating Heating temper-
mode ature
Comfort mode Subject to set comfort
temperature
Setback mode Subject to set setback
temperature
Frost protection Frost protection tem-
perature
Stop None
Comfort mode 1 °C less than the set
-1 °C comfort temperature
Comfort mode 2 °C less than the set
-2 °C comfort temperature
CNS TREND | CNS TREND U | 23