Dwyer CXA - Manual

Series CXA Water Pump Pressure Switch
Specifications - Installation and Operating Instructions
Bulletin IN-525A
INSTALLATION/MOUNTING
The switch can be pipe mounted in any position. Do not twist the
case when installing. Use a wrench on the pressure connection
flats.
WIRING
All wiring must conform to the National Electrical Code and local
regulations. Do not install the control to handle loads in excess of
electrical rating shown in specifications or as indicated on
instructions inside control cover.
TURN
CLOCKWISE
TO INCREASE
BOTH CUT-OUT
AND CUT-IN
PRESSURE
TURN
CLOCKWISE
TO INCREASE
CUT-OUT
PRESSURE
WITHOUT
AFFECTING
CUT-IN
MOTOR
LINE
LINE
POWER
SUPPLY
MOTOR
M
WIRING DIAGRAM
SPECIFICATIONS
Service: Compatible liquids and gases.
Wetted Materials: Silicone, steel, and SS.
Temperature Limits: 140°F (60°C).
Pressure Limits: See model chart.
Enclosure Rating: General purpose.
Repeatability: ±5 psig (±0.3 bar).
Switch Type: SPST snap action (see model chart).
Electrical Ratings: 20A @ 120 VAC, 12A @ 240 VAC, 9.6A @
240 VAC (3 phase), 8.6A @ 32 VDC, 3.1A @ 120 VDC, 1.6A @
240 VDC.
Electrical Connections: Screw terminal.
Conduit Connection: 7/8˝ hole for 1/2˝ conduit hub (2 places).
Process Connection: 1/4˝ female NPT.
Mounting Orientation: Switch can be installed in any position.
Setpoint Adjustment: Internal screws.
Weight: 0.75 lb (0.34 kg).
Deadband: See model chart.
Agency Approvals: CE, UL pending.
CAUTION: No lubrication or periodic servicing is required. Mount
the control securely. Never exceed the electrical rating for the
switch. Use the control only with compatible medias.
MAINTENANCE
Upon final installation of the Series CXA Water Pump Pressure
Switch, no routine maintenance is required. A periodic check of
the system calibration is recommended. The Series CXA 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
good authorization number before shipping.
©Copyright 2006 Dwyer Instruments, Inc. Printed in U.S.A. 11/06 FR# R3-443463-00
MERCOID DIVISION
DWYER INSTRUMENTS, INC.
P.O. BOX 258 • MICHIGAN CITY, INDIANA 46361 U.S.A.
Phone: 219/879-8000 www.dwyer-inst.com
Fax: 219/872-9057 e-mail: [email protected]
The Series CXA Water Pump Pressure Switches have been
proven reliable for controlling automatic water systems. These
switches are very popular for use on water well pumps and
pumping systems. The set point and deadband are both easily
adjustable via screws inside the cover. For ease of installation, the
switches come with a 1/4˝ female NPT process connection and
can be mounted in any orientation. The series CXA’s simple design
makes it a great switch for an installer at any skill level.
MODELS
Max.
Pressure
psig (bar)
129 (8.9)
179 (12.3)
204 (14.1)
129 (8.9)
179 (12.3)
204 (14.1)
Switch
Type
NC
NC
NC
NO
NO
NO
Model
Number
CXA-S1
CXA-S2
CXA-S3
CXA-R1
CXA-R2
CXA-R3
Range
psig (bar)
15-80 (1.0-5.5)
30-100 (2.1-6.9)
35-150 (2.4-10.3)
15-80 (1.0-5.5)
30-100 (2.1-6.9)
35-150 (2.4-10.3)
Approx.
Adjustable
Deadband
psig (bar)
15-30 (1.0-2.1)
20-35 (1.4-2.4)
30-40 (2.1-2.8)
15-30 (1.0-2.1)
20-35 (1.4-2.4)
30-40 (2.1-2.8)
2-17/64
(57.6)
3-3/8
(85.5)
3-45/64
(94)
2-9/16
(65)