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SECTION 2—INSTALLATION AND WIRING
2.1 INTRODUCTION
2.2 INITIAL INSPECTION
2.3 OPERATOR SAFETY CONSIDERATIONS
2.4 OPERATING ENVIRONMENT
2.5 INSTALLATION LOCATION
2.6 MOUNTING PROCEDURES
Caution: Be sure all personnel involved in installation, servicing, and programming are qualified
and familiar with electrical equipment, their ratings and proper practices and codes. Multiple
voltages and signal levels may be present during the installation, operation, and servicing of
this product. Do not power the product until the safety provisions outlined in this section have
been observed.
This section includes information regarding the initial inspection, preparation for use, and
storage instructions for the 910 Series Heat Trace Controller.
Inspect the shipping container for damage. If the shipping container or cushioning material
is damaged, it should be kept until the contents of the shipment have been verified for com-
pleteness and the equipment has been checked mechanically and electrically. Procedures
for configuring and operating the heat trace controller are given in Sections III, IV, and V. If
the shipment is incomplete, there is mechanical damage, a defect, or the controller does not
pass the electrical performance tests, notify the nearest nVent representative. If the shipping
container is damaged, or the cushioning material shows signs of stress, notify the carrier as
well as your nVent representative. Keep the shipping materials for the carrier's inspection.
The standard 910 controller using solid-state relays is suitable for Class 1, Division 2, Groups
A, B, C, and D hazardous areas. Hazardous areas are defined by Article 500 of the National
Electrical Code and Section 18 of the Canadian Electrical Code. Electromechanical relay (EMR)
based assemblies are suitable for use in ordinary (non-hazardous) areas only.
Caution: Some wiring configurations will use more than one power source and all must be
de-energized prior to performing any maintenance on a controller circuit.
The operating environment should be within the limitations specified in the 910 Heat Trace
Controller Specifications outlined in Appendix A.
The wide ambient operating temperature range of the controller permits installation in most
any convenient location. Considerations should include expected atmospheric conditions,
accessibility for maintenance and testing, the location of existing conduits and hazardous area
rating. Ambient temperature conditions may affect load current ratings.
Caution: Always be sure that the intended location is classified as an area that the product is
approved for as defined by Article 500 of the National Electrical Code and/or Part I, Section 18
of the Canadian Electrical Code.
Mounting hole dimensions for the standard enclosures are shown in Appendix B. Conduit
entries should be made in the bottom of the enclosure if possible to reduce the possibility
of water entry or leakage. Conduit entries must be drilled/punched following the enclosure
manufacturers' recommendations. Use bushings suitable for the enclosure type and install
such that the completed installation remains waterproof. For nonmetallic enclosures,
grounding hubs and conductors must be installed in accordance with Article 501-4(b)
of the National Electrical Code and Part I of the Canadian Electrical Code.
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