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nVent RAYCHEM Elexant 3500i Electronic Thermostat Installation Guide
INSTALLATION
For installation/operation, always observe the Equipment Safety Law, the rules of generally accepted engineering practice (IEC 60079-14 /
EN 60079-14), and the instructions stated in this installation manual. Carry out work on the thermostats in the de-energized state only.
ꢀBranch circuit protection and disconnection devices shall be provided a location that is easily reached, and identified as the disconnect
device for the equipment in.
Mechanical installation
Elexant 3500i units comprise of either a temperature controller or a safety temperature limiter that can be set via programming. The
controllers can be installed in any position on a stable structure by means of the 4 mounting holes. The Elexant 3500i unit can be mounted
directly on a pipe up to a pipe temperature of 205°C (401°F). Ensure that the ambient temperature of the equipment does not exceed 60°C
(140°F) at any time. To provide sufficient stability, the pipe stand shall be attached by means of 2 pipe straps.
Connecting cables and Conduit hubs to Elexant 3500i units
ꢀAt ambient temperatures above 45°C (113°F) the cable selected should have a temperature rating of 90°C (194°F) or higher. Conduit
hubs with a temperature rating of 90°C (194°F) or higher and Type 4X should be selected.
ꢀCopper (Cu) conductors shall be used
Installation instructions for Conduit hubs (threaded holes only.) RTD, communications, and alarm relay wiring must be wired through separate
conduit hub from high voltage power wiring.
A
Figure 2: Mounting positions Elexant 3500i
Enclosure Material Limitations
Only use approved conduit hubs, suitably certified for the intended area of use.
Better than 3,2 µm is recommended.
Maximum level of surface roughness allowed is Ra 6 µm
Maximum surface roughness of the enclosure wall
If the sealing surfaces are uneven, use PTFE washer
NFWM25 or the green fiber washer GFWM25
(Washers are to be ordered separately)
Enclosure interface sealing method
Thickness range for the enclosure wall (t)
Perpendicularity
≥ 4 mm (5/32")
+/–1° or 0,2 mm at the outer edge of the conduit hub, whichever is smaller
For metal conduit hubs use an internal locknut to assure earth continuity with
the Elexant 3500i internal earth plate. Alternatively, earth tags connected to one
of the internal PE terminals can be used.
Permitted use and location of any earth tags
For chamfered holes
Lock nuts
Only parallel threads are allowed.
Only use nVent RAYCHEM locknuts or types recommended by the conduit hub
manufacturer.
The installation instructions provided by the conduit hub manufacturers must be
followed.
Recommended torque values
6
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nVent.com/RAYCHEM
| General | Details |
|---|---|
| Name | nVent RAYCHEM Elexant 3500i Electronic Thermostat Installation Guide |
| Make | nVent RAYCHEM |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.26 MB |
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