Installation Instructions - nVent RAYCHEM Elexant 450c Mode D'emploi

IMPORTANT SAFEGUARDS AND WARNINGS
WARNING: FIRE AND SHOCK HAZARD
nVent RAYCHEM Elexant Systems must be installed correctly to ensure proper
operation and to prevent shock and fire. Read these important warnings and carefully
follow all the installation instructions.
Follow the guidelines included in this document in order to minimize the risk of
electrical shock or fire and to comply with nVent's requirements as well as agency
and national electrical codes.
Description
nVent RAYCHEM Elexant 450c is an electronic control thermostat with colour touch
display for DIN rail mounting in panels, advanced alarm facilities and the capability of
switching 1 (standard version) or 2 (2
zones via external contactors.
Electronic temperature control unit for pipe freeze protection and grease line
temperature maintenance of nVent RAYCHEM pipe freeze protection heating cables.
The Elexant 450c is designed to control nVent heating cable systems. Heating cables
can be controlled (switched ON/OFF) via a suitably rated contactor for heating
loads up to 20 A. The Elexant 450c-Modbus version (1244-022623 ) allowing flexible
Modbus connectivity for remote monitoring, configuration, and ease of integration in
a Building Management System (BMS).
Installation and all wiring must be in accordance with applicable regulations.
The device must be installed in non-hazardous areas only.

2. INSTALLATION INSTRUCTIONS

Electrical connections to be made by qualified electricians.
:
Attention mistakes made when connecting the device can cause damage to the
control unit. nVent is not liable for any damage caused by faulty connection and/or
incorrect handling.
• Before working on the device, switch off the power supply.
• The device may only be connected and serviced by authorised,
trained personnel.
• The device is only designed to be connected to fixed cables.
• When installing the device, make sure that high-voltage cables, such as the main
supply and extensions do not come into contact with low-voltage cables such as
sensor cables.
• Ensure the installation is made in accordance with EN60730-1.
• Local standards for electrical connection must be observed.
• If the device does not work, please first check all connections and the main
power supply.
2.1 Mounting of the enclosure
This device must be installed in a housing and snapped onto DIN rails (DIN EN
50022-35). It is designed to be mounted in switch and distribution boxes. nVent
provides a wide range of panels as standard or tailor-made products.
2.2 Sensor installations
Location of the sensor: on pipe - see picture E1
• as indicated in the system design documentation
• not on valves, flanges, supports, pumps or other heat sinks
• at the top of the pipe for thermally sensitive pipe contents (A)
• on lower quadrant of pipe 90° for single heating cable (B)
• on lower quadrant of pipe centrally between the heating cables if they are two or
more
Attachment of the sensor
• fix sensor firmly on surface with adequate fixing tape (same tape as used to fix
heater to the pipe) in two places (D1/2)
• fix sensor parallel to pipe (D1/2)
• route sensor cable and eventual extension cable to avoid damage in use. Fix to
pipe with adequate tape where appropriate
4 | nVent.com/RAYCHEM
heating zone: optional) independent heating
nd