Instruction manual

Special Appendix for ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)
Revised Feb-2013 Special Instructions for Class I, Division 2 A-1
Appendix A – ControlWave GFC Plus– Special
Instructions for Class I, Division 2
Hazardous Locations
1. The ControlWave GFC Plus Gas Flow Computer is listed by
Underwriters Laboratories (UL) as nonincendive and is suitable for
use in Class I, Division 2, Groups C and D hazardous locations or
non-hazardous locations only. Read this document carefully before
installing a nonincendive ControlWave GFC Plus Gas Flow
Computer. Refer to CI-ControlWave GFC Plus for general
information. In the event of a conflict between the ControlWave
GFC Plus Customer Instruction Manual (CI-ControlWave GFC
Plus) and this document, always follow the instructions in this
document.
2. The ControlWave GFC Plus Gas Flow Computer includes both
nonincendive and unrated field circuits. Unless a circuit is
specifically identified in this document as nonincendive, the circuit
is unrated. Unrated circuits must be wired using Div. 2 wiring
methods as specified in Article 501-4(b) of the National Electrical
Code (NEC), NFPA 70 for installations in the United States, or as
specified in Section 18-152 of the Canadian Electrical Code for
installation in Canada.
3. The local communications port terminates in a circular 5-pin
connector on the bottom of the ControlWave GFC Plus Gas Flow
Computer’s front cover. The wiring on this connector is unrated. No
connections may be made to this port unless the user ensures that the
area is known to be nonhazardous. Connections to this port are
temporary, and must be short in duration to ensure that flammable
concentrations do not accumulate while it is in use.
4. The optional power system (solar panel and battery) approved for
use with the nonincendive ControlWave GFC Plus Gas Flow
Computer are described in the model specification. The connection
to the solar panel is approved as a nonincendive circuit so that
Division 2 wiring methods are not required. The nominal panel
voltage must match the nominal battery voltage (6V or 12V).
5. An RTD is normally supplied with the ControlWave GFC Plus.
Connection to the RTD is approved as a nonincendive circuit, so
that Division 2 wiring methods are not required.
6. Signal connectors available for customer wiring are listed in Table
A-1. Network communications port and I/O wiring connections are
unrated and must be wired using Division 2 wiring methods.