Omega PSW-180 User Manual 2

PSW-180 SERIES

Differential Pressure Switches

INSTRUCTION

SHEET

M-1477/0500

NEVER TIGHTEN BY TURNING THE
CONTROL INTO THE FITTING.

MODELS PSW-181, 182, 185, 186 HAVE
A POLYSULPONE PORT WITH 1/4” NPSF

THREAD. A 1/4 NPT OR 1/4 NPS
FITTING MAY BE USED WITH THIS
CONNECTION. HOWEVER, IN BOTH CASES, THE
MATING FITTING WILL BOTTOM-OUT IN THE
PRESSURE CONNECTION. THEREFORE, WITH
THESE MODELS, TEFLON TAPE MUST BE
APPLIED TO FITTING FOR A TIGHT SEAL. DO
NOT OVER TIGHTEN. CONNECTION TORQUE
MUST NOT EXCEED 2 FT. / LBS. OVER
TIGHTENING MAY DAMAGE THE PORT.

WIRING

ALL LIVE SUPPLY CIRCUITS MUST BE
DISCONNECTED BEFORE WIRING THE

CONTROL. FOR ENCLOSED UNITS,
CONNECT THE CONDUIT TO THE HOLE IN
ACCORDANCE WITH NATIONAL AND LOCAL
CODES. BRING WIRES UP TO THE TERMINALS
FROM THE REAR. MAXIMUM RECOMMENDED
WIRE SIZE IS 16 AWG.

Unscrew terminal just enough to put stripped
wire under terminal block clamp.

Tools Needed

Screwdriver

Use screwdriver to turn external adjusting screw
on the side. Turn “in” (clockwise) to increase
pressure setting. For best setting accuracy, set the
switch using the actual working pressures
encountered in the application.

GENERAL

The PSW-180 differential pressure switch utilizes
dual diaphragm sensors to monitor the difference
in pressure between two sources.

Tools Needed

Screwdriver to accommodate

customer-supplied mounting screws

Adjustable wrenches (2)

MOUNTING

LOCATE SWITCH WHERE VIBRATION,
SHOCK, AND AMBIENT TEMPERATURE

FLUCTUATIONS ARE MINIMAL. TO
AVOID DAMAGE TO CONTROL, ALWAYS HOLD
THE WRENCH ON THE WRENCH FLATS OR HEX
PORTION OF THE PRESSURE CONNECTION
WHEN TIGHTENING.

The control can be mounted in any position. Locate
where ambient temperature is above 30°F and
below 160°F.

Sur

face Mounting

Insert two #6 screws through mounting ear holes
on 2” centers (Recommended mounting for
maximum vibration resistance).

Pipe Mounting

Mount unit from its port(s). Always hold a
wrench on pressure port when making pressure
connection.

Making Pr

essure Connection

Use a wrench on the pressure port and thread a
1/4” NPTM fitting into the port. Be sure to
connect high pressure source to port labeled
“HIGH”. Similarly, connect low pressure source
to “LOW”.

Part I - Installation

Part II - Adjustments

Dimensions

MODEL PORT DIM A.

DIFFERENTIAL

PRESSURE

PSW-181, 182, 1/4” NPSF

185, 186 Polysulphone 2.75” (69.9 mm)

PSW-183,

184, 187, 188 1/4” NPTF Brass 3.125” (79.4 mm)

IMPSW180-01

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.

WARRANTY/DISCLAIMER

OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period of 13 months
from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to the normal one (1) year
product warranty to cover handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.

If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service Department will issue an
Authorized Return (AR) number immediately upon phone or written request. Upon examination by OMEGA, if the unit is
found to be defective, it will be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects resulting
from any action of the purchaser, including but not limited to mishandling, improper interfacing, operation outside of design
limits, improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been
tampered with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat, moisture or
vibration; improper specification; misapplication; misuse or other operating conditions outside of OMEGA’s control.
Components which wear are not warranted, including but not limited to contact points, fuses, and triacs.

OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes
responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its
products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only that
the parts manufactured by it will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE, AND ALL IMPLIED
WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set forth herein are exclusive, and
the total liability of OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the component upon which
liability is based. In no event shall OMEGA be liable for consequential, incidental or special damages.

CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic Component” under
10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical applications or used on humans. Should
any Product(s) be used in or with any nuclear installation or activity, medical application, used on humans, or misused in any
way, OMEGA assumes no responsibility as set forth in our basic WARRANTY/ DISCLAIMER language, and, additionally,
purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use
of the Product(s) in such a manner.

RETURN REQUESTS / INQUIRIES

Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE RETURNING ANY
PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S
CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then
be marked on the outside of the return package and on any correspondence.

The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent breakage in transit.

FOR W

ARRANTY RETURNS, please have the following

information available BEFORE contacting OMEGA:

1. Purchase Order number under which the product was
PURCHASED,

2. Model and serial number of the product under
warranty, and

3. Repair instructions and/or specific problems relative to
the product.

FOR NON-WARRANTY REPAIRS,

consult OMEGA for
current repair charges. Have the following information
available BEFORE contacting OMEGA:

1. Purchase Order number to cover the COST of the repair,

2. Model and serial number of the product, and

3. Repair instructions and/or specific problems relative to

the product.

OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest in
technology and engineering.

OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2000 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced

to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.

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