Siemens Pacemaker UM344-2 Manual de usuario descargar pdf (Pagina 69)

UM344-2 INSTALLATION

September 1995

7. If one of the two electrical conduit entrances in the housing is not used, it should be plugged. Refer to

the Transmitter's nameplate and Section 8.1 to determine whether entrance holes accept ½-14 NPT

or M20 x 1.5 fittings.

Seal ½ NPT fittings with TFE/PTFE tape; seal M20 fittings with a soft setting sealing compound rated for

at least 105°C (221°F).

4.6 HAZARDOUS AREA INSTALLATION

Drawings showing Transmitter installation data for hazardous areas are located in Appendix B. Entity

parameters, barrier selection, and important wiring information are specified on these drawings. The

Appendix also contains a list of tested barriers.

Before installing a transmitter in a hazardous area, check the nameplate and Sections 8.1 and 8.3 of this

Manual for required approvals or certifications.

NOTE

The MXC is approved for use in non-hazardous areas only.

EXPLOSION-PROOF INSTALLATION

If the installation is required to be explosion-proof per the National Electrical Code, refer to a current copy

of the Code and the following:

Ÿ User supplied explosion-proof conduit seals (glands) are required on transmitter housing conduit outlets

and any installed junction boxes. See Figure 4-11.

Ÿ Explosion-proof glands must provide a good seal. Apply a sealing compound around the sealing

surface if necessary.

Ÿ Sensor and power wiring conduit entries at the Transmitter must have a minimum of five threads fully

engaged.

Ÿ The enclosure cap must be installed and have a minimum of eight threads fully engaged with no

damaged threads permitted.

Ÿ Go to Section 4.5 for wiring connections to the transmitter's terminals. Refer to Appendix B for

hazardous area installation information.

This completes the physical installation.

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Siemens Pacemaker UM344-2 Manual de usuario Pagina 69