nVent RAYCHEM Elexant 450c Mode D'emploi page 5

Location of the sensor: outdoor - see picture E2
EN
Mount the sensor in a position exposed to normal weather conditions but shielded
from direct sunlight. The sensor should not be located against surfaces that
are heated from within or may be heated by sunlight. We recommend using the
sensor with housing GM-TA-AS (PCN 1244-017965) for outside areas for ambient
temperature detection.
Warning: Do not install sensor at ambient temperatures below –20°C. Do not bend
the final 50mm of the sensor. Min. bending radius for sensor cable: 10 mm.
Wiring sensor to Elexant 450c
Enter the sensor cable according to the drawing for sensor 1 or sensor 2 shown in
the wiring diagram (page 2). Please pay attention to color coding of the wiring. The
unit will be provided with 1 sensor (NTC -type). A second sensor can be connected
but needs to be ordered separately. Sensor-NTC-10 M (PCN 1244-015847).
Sensor extension
The sensor cable can be extended up to 150 m when a cross section of 2 x 1,5 mm²
is used (max. 20 Ω per conductor). The connection between sensor cable and sensor
extension can be made in junction box JB-86 or equivalent. Use a shielded cable for
extension to avoid interference. The shielding braid is to be earthed in the panel/
thermostat.
Ensure that the pipe and sensor are thermally insulated and clad to the design
specification after installation of the thermostat.
Sensor temperature range extension
By using the accessory item Sensor Module SM-PT100-2 (PCN 1244-022442) for
connection to a PT100 type of sensor, the temperature range can be extended up to
245°C.
Modbus connection
The Elexant 450c-Modbus (PCN 1244-022623) can be connected to a Building
Management System (BMS) by using MONI-RS485-WIRE shielded, twisted 2-core
cable (max. 1000 m) for the connection master / slave and BMS.
3. OPERATION
If Elexant 450c / 450c-Modbus is not programmed, the unit will start a quickstart
menu after powering up. For further detailed parameters and settings use the separate
operation manual and the Modbus register map document.This can be downloaded
from www.nVent.com/RAYCHEM.
Note: The pre-programming of the controller can be done with an external power-bank
in case of no power supply on site during controller/panel installation.
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