Emerson Process Management 3420 Carbon Monoxide Alarm User Manual


 
58 For systems using explosion-proof conduit
Section 3: Installation Reference, Installation, and Operations Manual
June 2013 3-9000-743 Rev S
3.3.5 For systems using explosion-proof conduit
1. Assemble conduit to the electronics enclosure.
If the conduit pipe is two inches or more, a conduit seal is required within 18 inches
(150 mm) of the enclosure.
2. Remove the end cap nearest the conduit entry to gain access to the Field Connection
Board.
3. Check to make certain that all power to the field wiring is turned OFF.
4. Pull the wires.
5. Complete connections to the Field Connection Board (see Section 3.4).
6. Select the communications driver by setting the jumpers as shown in Table 3-7 through
Table 3-21.
7. Replace the end cap. If desired, secure the end caps to the body with seal wires.
8. Apply the sealing compound to the conduit seal and allow to set in accordance with
manufacturer specifications.
HAZARDOUS VOLTAGE INSIDE ENCLOSURE
Do not open enclosure in flammable gas area. Disconnect all power to the meter.
Failure to do so may result in injury to personnel or cause damage to the equipment.