Fluid-components-international FLT93 Nuclear Manuel d'utilisateur télécharger pdf (Page 14)

INSTALLATION FLT

Series FlexSwitch

14 Fluid Components International LLC

Install and Wire the Enclosure(s)

Caution:

In applications where the sensing element is located in an explosive environment, isolate the conduit before it leaves the

environment. A potting Y may be used to provide the isolation.

Pulling wires can cause damage to the control circuit. Therefore, remove the control circuit from the enclosure and use

extreme care when pulling wires into the enclosure.

Mount and wire the control circuit either locally or remotely (option) by following the local or remote enclosure procedure below.

Minimum Wire Size

Table 2-1 shows the smallest (maximum AWG number) copper wire that is used in the electrical cables. Use a lower gauge of wire for less of

a voltage drop. Contact FCI concerning greater distances than those listed in the table. The sensing element cable must be shielded. If the

cable is spliced the shield wire must be continued through the splice. If a terminal block is used, the shield must have its own terminal.

Enclosures Covers

All enclosure covers must be in place and securely closed to achieve environmental and safety classiﬁ cations.

All circular thread-on covers should be tightened about 1/3-turn past hand tight.

Cover locks must be in place and secure if required by a particular approval.

Note: Nitrile (buna-N) O-rings are standard on the circular thread covers;n these O-rings have a 250°F (121°C) maximum useage

temperature.

A Viton O-ring [400°F (204°C) max. temp.] is available for the thread-on covers; these O-rings have a 500°F (260°C) maximum useage tem-

perature.

To receive a Viton O-ring, provide FCI with the following information:

• Shipping address

• Quantity required

• Desired P/N:

Use P/N 000391-01 for the single conduit port enclosure (Local)

Cable and Conduit Entry Devices

The cable and conduit entry devices and blanking elements shall be of a certiﬁ ed ﬂ ameproof type EEx d, suitable for the conditions of use and

correctly installed. With the use of conduit entries a ceiling device shall be provided immediately on the entrance of the device.

All cable glands and conduit ﬁ ttings, includign conduit plugs, must meet or exceed the area approval where the unit is being installed.

Connection

Maximum Distance for AWG

10 ft.

(3m)

50 ft

(15m)

100 ft.

(31m)

250 ft.

(76m)

500 ft.

(152m)

1000 ft.

(305m)

AC/DC Power 22 22 22 20 18 16

Relay (6A) 28 22 20 16 12 10

Flow Element Wires* 22 20 20 18 18 18

* Requires a shielded cable with the shield wire connected to the control socket only.

Table 2-1 Maximum AWG Number

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 57 58

Commentaires sur ces manuels

Pas de commentaire

Fluid-components-international FLT93 Nuclear Manuel d'utilisateur Page 14

Commentaires sur ces manuels

Produits connexes et manuels pour Équipement Fluid-components-international FLT93 Nuclear