Table of Contents
Advertisement
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
12
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 on the initial inspection, preparation for use, and storage
instructions for the 920 series heat trace controller.
Caution: Solid-state relay (
SSR
removed. Exercise care when handling
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 complete-
ness and the equipment has been checked mechanically and electrically. Procedures for config-
uring and operating the heat trace controller are given in Section 3 on page 18. If the shipment is
incomplete there is mechanical damage, a defect, or the controller does not pass the electrical
performance tests, notify your Tyco Thermal Controls representative. If the shipping container is
damaged, or the cushioning material shows signs of stress, notify the carrier as well as your
Tyco Thermal Controls representative. Keep the shipping materials for the carrier's inspection.
The standard 920 controller using solid-state relays is suitable for Class I, Division 2, Groups A,
B, C, D and Zone 2 hazardous areas. Hazardous areas are defined by Article 500 of the National
Electrical Code and Section 18 of the Canadian Electrical Code. Contactor-based assemblies are
suitable for use in ordinary (non-hazardous) areas only.
Caution: Many 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 described in the 920 heat trace con-
troller specifications outlined in Appendix A on page 61.
The wide ambient operating temperature range of the controller permits installation in any con-
venient location. Considerations should include expected atmospheric conditions, accessibility
for maintenance and testing, the location of existing conduits, and hazardous area rating. Ambi-
ent 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.
) modules may be extremely hot immediately after power is
s.
SSR
Hide quick links:
Advertisement
Table of Contents
