Dwyer A9 - Manual

Series A9 Mini Pressure Switch
Specifications - Installation and Operating Instructions
Bulletin IN-A9
SPECIFICATIONS
Service: Non-hazardous gas, liquid, or steam.
Wetted Materials: Connection: Copper, Diaphragm:
Silicone or Stainless Steel (see model chart).
Temperature Limits: See model chart.
Pressure Limit: See model chart.
Repeatability: ± 5%.
Switch Type: SPDT.
Electrical Ratings: 21A @ 125/250 VAC.
Electrical Connections: 1/4˝ (6.35 mm) male quick
connect.
Process Connection: 1/8˝ male NPT.
Weight: 2.6 oz (75 g).
Deadband: See model chart.
MAINTENANCE
Upon final installation of the Series A9 Mini Pressure Switch,
no routine maintenance is required. A periodic check of the
system calibration is recommended. The Series A9 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 2007 Dwyer Instruments, Inc. Printed in U.S.A. 12/07 FR# R3-443562-00
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]
Series A9 Pressure Switches are designed for controlling
pressure with higher current capacity. These switches are
used widely in steam cleaners, steam irons, and other pres-
sure control systems. It provides SPDT contact and Series
A9 Pressure Switches utilize high-quality miniature snap-ac-
tion switches. The switch is diaphragm operated, boasting
a high temperature rating and compact size.
INSTALLATION/MOUNTING
The switch can be mounted in any position. Do not twist
the case when installing.
WIRING
All wiring must conform to the National Electrical Code and
local regulations. Do not install the control to handle loads
in excess of the electrical rating shown in the
specifications. The terminals are labeled on the switch itself.
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.
A9-1
A9-2
A9-3
A9-4
A9-5
A9-6
Model
Number
2.9 ± 1.5 (0.2 ± 0.1)
2.9 ± 1.5 (0.2 ± 0.1)
2.9 ± 1.5 (0.2 ± 0.1)
3.6 ± 2.2 (0.25 ± 0.1)
5.1 ± 2.9 (0.35 ± 0.2)
8.7 ± 2.9 (0.6 ± 0.2)
Deadband
psig (bar)
2.9-8.7 (0.2-0.6)
7.3-17.4 (0.5-1.5)
14.5-36.3 (1.2-2.5)
21.8-58 (1.5-4.0)
29-87 (3.0-7.0)
58-130.5 (5.0-9.0)
Range psig (bar)
43.5 (3.0)
58.0 (4.0)
72.5 (5.0)
87.0 (6.0)
116.0 (8.0)
145.0 (10.0)
Max Pressure
psig (bar)
1-57/64
[48.02]
1-35/64
[39.29]
ш1-1/2
[ш38.10]
1-7/64
[28.18]
1/8 NPT
Silicone
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Stainless Steel
Diaphragm Material
185˚F (85˚C)
257˚F (125˚C)
257˚F (125˚C)
257˚F (125˚C)
257˚F (125˚C)
257˚F (125˚C)
Temperature
Limit
IN-A9 12/12/07 9:35 AM Page 1