Dwyer CD User Manual

Bulletin IN-619

COMMON

ON HIGH

ON LOW

Series CS Low Cost Diaphragm Pressure Switches

Specifications – Installation and Operating Instructions

1-5/16

[33.34]

The Series CS Low Cost Diaphragm Pressure Switch is
ideal for instrument panels, small compressors and gen­eral industrial applications. Visible set point and easy-to­wire SPDT snap switch reduce installation time. This
switch operates in any position and is vibration resistant.

INSTALLATION/MOUNTING

The control can be pipe mounted. Do not twist the case
when installing. Use wrench on the pressure connection
flats.

WIRING

All wiring must conform to the National Electrical code
and local regulations. Do not install control to handle
loads in excess of electrical rating shown in specifications
or as indicated on instructions inside control cover.
Connect wiring to screw terminals depending on the
action required. Common and High contacts will close
and Common and Low contacts will open when increas­ing pressure (or vacuum) reaches set point. The reverse
will occur when pressure (or vacuum) drops below the set
point less the deadband.

WIRING DIAGRAM

TOP VIEW

CAUTIONS: Do not oil any parts. Mount control securely.
Never exceed electrical rating for switch. Use only with
compatible.

11/16

[17.46]

1-1/16

[26.99]

1/2 [12.7]
CONDUIT HOLE

3

[76.2]

3-3/4

[95.25]

3-3/16
[80.96]

1/4 NPT

2-3/16

[55.56]

PHYSICAL DATA
Temperature Limits: -30 to 150°F (-34.4 to 65.6°C)
Pressure Connections: 1/4″ NPT(F)
Electrical Ratings: 12 A @ 120 VAC; 8 A @ 240 VAC; 7A

@ 277 VAC; 1/8 HP @ 120 VAC; 1/4HP @ 240 VAC

Switch Type: SPDT snap acting
Conduit Opening:1/2″
Wiring Connections: Three screw type, common, N.O.,

N.C.

Set Point Adjustment: Screw type, inside cover
Housing: Galvanized steel, NEMA 1
Diaphragm: Buna-N/Nylon
Calibration Spring: Plated steel
Installation: Any position
Weight:1/2lb. (0.23 kg)

Model

No.

CS-1

CS-3

CS-10

CS-30

CS-150

Adjustable

Operating Range

1-30" Hg. Vac.

2.5-75 cm Hg.Vac
10-100" w.c.

2.5-250 cm w.c.
1-10 psig

0.07-0.7 kg/cm
1-30 psig

0.07-2.1 kg/cm
10-150 psig

0.07-10.5 kg/cm

2

2

Fixed Deadband

Maximum Minimum

1.5" Hg.

3.8 cm Hg. Vac
7" w.c.

17.8 cm w.c.

0.4 psig

1.0 psig

5 psig

2

2

2

2

0.03 kg/cm

0.07 kg/cm

0.35 kg/cm

1" Hg. VAC

2.5 cm Hg. Vac
5" w.c.

12.7 cm w.c.

0.25 psig

0.02 kg/cm

0.5 psig

0.035 kg/cm

1.5 psig

0.1 kg/cm

2

Max.

Pressure

30 psig
30 psig

2

30 psig
50 psig

2

175 psig

WARNING

A failure resulting in injury or damage can be caused by
over-pressure, excessive vibration or pressure pulsation,
excessive temperature, corrosion of pressure containing
parts and movement assembly, electrical overload or
other misuse.

©Copyright 2001 Dwyer Instruments, Inc. Printed in U.S.A. 4/01 FR#90-442119-00 Rev. 2

MERCOID DIVISION

DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46361 U.S.A.

Phone: [phone] www.dwyer-inst.com
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