Omega Products PSW300 Installation Manual

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TM

®

User’s Guide

PSW300 Series

Pressure Switches

Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST

®

Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

®

TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: Tel: [phone] FAX: [phone]

En Espan˜ ol: [phone]-7803 e-mail: [e-mail]

[e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LAAmstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Rudé armády 1868, 733 01 Karviná

TEL: [phone] FAX: [phone]
Toll Free in Czech Rep.: 0800-1-66342 e-mail: [e-mail]

France: 9, rue Denis Papin, 78190 Trappes

TEL: [phone] FAX: [phone]
Toll Free in France: 0800-4-06342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 TC-OMEGA

SM

e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5EX, United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in the United Kingdom: 0800 488 488
e-mail: [e-mail]

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OMEGAnet®On-Line Service Internet e-mail

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It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

TM

®

INSTALLATION AND ADJUSTMENT INSTRUCTIONS

OMEGA

®

PSW300 SNAP-ACTION

SWITCHES FOR PRESSURE CONTROL

STANDARD RANGES

10, 30, 60, 100, 150 in.H2O

STANDARD RANGES

15,30, 60, 100, 200, 400.600 PSI

*1000, 2000, 3000 PSI

OPERATION

The OMEGA®pressure control is a precision
device which features a snap-action switch.
Fixed deadband is available with single or dual
SPDT independently adjustable switches with
various electrical ratings. Adjustable deadband
is available with SPDT switch with various
electrical ratings. Several wetted material con­structions for compatibility with pressure
media may be obtained.

PSW321 through PSW348 switches may be set
to operate simultaneously or up to 85 percent
of the range apart. The deadband of each
switch will be within the limits noted on the
nameplate. PSW301 through PSW311 switches
may be set to operate with any deadband with­in the limits shown on the nameplate.

MOUNTING

The PSW300 Series OMEGA®snap-action pres­sure switch has a NEMA-4X enclosure which is
an epoxy coated aluminum casting.

Two holes in the integral bracket are used to
surface mount the control. Location of these
holes is shown on the general dimension draw­ings. Mount on a vibration free surface or pipe
in any orientation. When tightening control to
pressure line, always use the wrench flats or

hex on the pressure connection.

NEVER

TIGHTEN BY TWISTING THE CASE.

ELECTRICAL CONNECTION

Remove cover, held in place by two screws.

Wire directly to the switch according to circuit
requirements. Terminals are marked common
(C), normally open (NO) and normally closed
(NC).

CONDUIT CONNECTIONS

One 3⁄

4 NPT hole fitted with a shipping plug,

and two additional knock outs are provided.
The knockouts may be removed by placing a
screwdriver in the slot and rapping sharply
with a hammer. It is recommended that Teflon
tape or other sealent be used on conduit bush­inqs or plug threads to ensure integrity of the
enclosure.

SETPOINT ADJUSTMENTS

Setpoints are changed by means of the setpoint
adjusters. The PSW300 Series adjustable dead­band and PSW320, 330, and 340 Series dual
switches each have two adjusters. On switches
with two adjusters, the one on the left is
referred to as “A” and the right one is referred
to as “B”; see illustration. Setpoints can be
adjusted from 20 to 100 percent of full range on
increasing pressure.