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4
Field and Panel
Wiring
For a successful installation of a TraceNet TCM series heat tracing control and
monitoring system, a number of equally critical parts of the system must be
installed properly. Areas requiring close attention are the heat trace and
insulation, the RTD temperature sensor installation, the distribution of the field
RTD and power wiring, and the installation and routing of wiring inside the
TraceNet TCM panel.
4.1 Heat Trace and Insulation Installation
All heat trace circuits and insulation shall be installed in accordance with project
installation details provided. In addition, refer to the Electric Heat Tracing
Maintenance and Troubleshooting Guide (Thermon Form No. 20745) for general
procedures and installation tips.
4.2 RTD Installation and Wiring
RTD control sensors should generally be installed on the process lines or in
ambient (where ambient sensing is applied) in a location that is most
representative of the entire heat trace circuit. In general, it is recommended that
the sensors not be located at heat sinks such as pipe supports, pumps, and
valves as the control system response needs to be based on the majority of the
process line. The RTD control sensor location on the process piping should
follow the installation guidelines detailed in
Figure 4.1
.
The heat tracing system installation shall be in accordance with the electrical area
classification requirements and as well shall conform to the latest requirements as
detailed in applicable heat tracing standards, the local Electrical Code and plant
standard practices. Where conflicts arise, contact the project engineer for resolution.
If the equipment is used in a manner not specified in this Guide, protections provided
by the equipment may be impaired.
