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INSTALLATION
Commissioning
12.6.2 Hard-wired connection to a circuit breaker
DANGER Electrocution
Carry out all electrical connection and installation
work in accordance with all national, state and local
building code.
WARNING Electrocution
In the case of a permanent connection, the heater must
be able to be separated from the power supply by an iso-
lator that disconnects all poles with at least
contact separation.
Material losses
- Trim the power cable so it leads directly to the heat-
er connection socket.
- Ensure that, after trimming the power cable, the
heater can still be removed from the wall without
issue.
When optionally hard-wiring 120 V models, trim the power
cable by cutting off the plug.
Connect the trimmed end of power cable to a suitable appli-
ance junction box. The junction box must be connected to a
properly sized circuit breaker. See section 16.2, "Wiring dia-
grams", pg. 14, for electrical requirements.
For 208–240 V units, a knockout for cable entry into the
junction box is located in the center of the rear upper part of
the heater. Included in the junction box are wires with wire
nuts attached. Install a ½˝ ROMEX clamp in the knockout to
prevent the power cable from being pulled out of the wiring
block during operation.
Cable must be routed from a circuit breaker of suitable size,
through the ROMEX clamp, and connected using the wire
nuts in the junction box of the unit. See section 16.2, "Wiring
diagrams", pg. 14.
Alternatively, the installer may remove the supplied wires
with nuts from the heater's wiring block, run wire of a suit-
able gauge through the installed ½˝ ROMEX clamp, and con-
nect the wire ends directly to the heater's wiring block. See
section 16.2, "Wiring diagrams", pg. 14.
12.6.3 Wiring block
Consult the chart below for the recommended torque amounts on
the wiring block screws.
Screw Size (mm)
Min. Torque (N•cm) Min. Torque (lbf•in)
M3.5
60–80
Using the proper torque specifications to secure wire to the wiring
block helps to avoid personal loss or property damage.
12
| CNS Trend & CNS Plus
13. Commissioning
The heater is ready for operation as soon as it has been mounted
to the installation wall and connected to the power supply.
14. Troubleshooting
The power cable must only be replaced (for example if damaged)
1
/
˝ (3 mm)
by a qualified contractor authorized by the manufacturer, using
8
an original spare part.
15. Heater handover
Explain the functions of the heater to the user. Draw special at-
tention to the safety instructions. Hand over the operating and
installation instructions to the user.
5.31-7.08
Remove the protective film from the programming unit dis-
play (Plus models only).
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