XA02744C
TDLAS Gas Analyzer
18
Hauser
Opening/Closing the Analyzer Enclosure
Protective Chassis and Ground Connections
To protect personnel and equipment, connect the protective and chassis
grounds first before connecting any electrical signal or power. Requirements
for the protective and chassis grounds are listed below:
•
The protective and chassis grounds and heater wire must be a mini
-
mum of 1.5 mm
(14 awg), equal or greater size than any other cur
-
rent-carrying conductors located in the sample conditioning system
(SCS).
•
The protective and chassis grounds must remain connected until all
other wiring is removed.
•
If the protective and chassis ground is insulated, it must use the green/
yellow color.
Electrical Wiring Requirements
External Circuit Breaker Requirements
Hazardous voltage and risk of electric shock. Failure to
properly ground the analyzer may create a high-voltage
shock hazard.
Interconnection of the analyzer enclosure and cell enclosure
shall be performed using wiring methods approved for Class
I, Division 2 or Zone 2 hazardous locations per the Canadian
Electrical Code (CEC) Appendix B or J and Article 18. Zone 2
is -150 and the National Electric Code (NEC) Article 501 or
505. The installer is responsible for complying with all local
installation codes.
An approved switch or circuit breaker rated for 15 amp should
be used and clearly marked as a disconnecting device for the
analyzer. The switch or circuit beaker shall not interrupt a
protective earth conductor.
Because the breaker in the customer-provided power
distribution panel or switch will be the primary means of
disconnecting the power from the analyzer, Hauser
recommends that the power distribution panel be located in
close proximity to the equipment and within easy reach of the
operator.
Thread lubricant must be applied on all conduit hub threaded
connections.
Hauser recommends using STL8
lubricant on all conduit screw thread and its taped openings.
