Dwyer L8 Manuel d'utilisateur télécharger pdf (Page 2)

Printed in U.S.A. 2/10

FR# 82-440881-00 Rev. 3

W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.

P.O. BOX 358 • MICHIGAN CITY, INDIANA 46361 U.S.A.

Phone: 219/879-8000 www.dwyer-inst.com

Fax: 219/872-9057 e-mail: info@dwyer-inst.com

INSTALLATION

1. The Model L8 Level Switch is designed for use in clean, com-

patible process media free from scale, debris and other for-

eign material which could collect on the float and impede its

movement. Build up from such materials will prevent proper

operation. See wetted materials list in the specifications to

assure compatibility with process liquids.

2. Unpack switch and remove any packing material from the

switch and float. Due to variations in fittings and amount of

thread engagement, float must be checked for proper oper-

ation during installation.

3. Use pipe thread sealant tape or pipe thread sealant to seal

the 1˝ NPT mounting connection. Avoid excess sealant

which could interfere with float movement. Do not exceed 50

ft/lb (40n/m) torque on the switch housing. Damage can

result.

4. Install switch in a horizontal position with index arrow point-

ing down.

5. Wire in accordance with local electrical codes. Lead wire

color codes are as follows. Black - Common, Red - Normally

Closed, Blue - Normally Open. Normal is the contact condi-

tion when liquid level is below the actuation point. Closed

contacts open and open contacts close when liquid level lifts

the float to the actuation point.

6. Switch electrical components must be protected from mois-

ture at all times. If necessary, install a lightweight, waterproof

junction box over the

˝ NPT threaded stem. Do not place

mechanical loading on the switch housing. Permanent dam-

age can occur. Use flexible Romex sheathing or equivalent.

Inconel

is a registered trademark of Huntington Alloys Corporation.

MAINTENANCE

The Model L8 Liquid Level Switch is not field serviceable and

should be returned if repair is needed (field repair should not be

attempted and may void warranty). Be sure to include a brief

description of the problem plus any relevant application notes.

Contact customer service to receive a return goods authorization

number before shipping.

E-41:Bulletin E-41 1/29/10 9:02 AM Page 2

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Dwyer L8 Manuel d'utilisateur Page 2

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