Series FSW Free-Floating Level Switch
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-mail: info@dwyer-inst.com
®
Installation and Operating Instructions
Series FSW Free-Floating Level Switch is a
dual level switch designed for filling and draining
of tanks, wells, and reservoirs. The shape and
interior balance weight ensure impurities and dirt
will not adhere to the surface, making it ideal for
sewage and waste water applications. The
mercury-free switch is designed with an inverter
microswitch housed in a polypropylene cover.
6 13/32
[162.99]
Ø 4 3/64
[102.87]
INSTALLATION
The unit should be installed in a vertical position.
Secure the cable with a small clamp in the
reservoir or container. Stress and mechanical
tension must be prevented when installing to
ensure proper operation. Be sure the cable avoids
any jagged edges that may wear at it.
Any extensions to the cable, must be performed
outside the reservoir or tank that the unit is
mounted in. (Other cable lengths are available,
please contact the factory). If the cable must be
extended on site, use a splice connection box to
seal the splice in the cable and prevent water
and/or humidity from damaging the unit.
WIRING DIAGRAM
STOP
(HIGH LEVEL)
START
(HIGH LEVEL)
Black
Black
Neutral
Neutral
START
(LOW LEVEL)
STOP
(LOW LEVEL)
Blue
Brown
Copyright U.S.A. 11/2003
BULLETIN L-FSW
SPECIFICATIONS
Service: Compatible
liquids, slurries.
Wetted Materials:
Polypropylene housing,
EPDM gland, PVC cable.
Temperature Limits:
140°F (60°C).
Pressure Limits: 60 psi (4
bar).
Enclosure Rating: NEMA
4 (IP68).
Switch Type: SPST.
Electrical Rating: 10 A @
250 VAC, resistive.
Mounting Orientation:
Vertical.
Weight: FSW-6: 2.6 (1.2
kg); FSW-15: 3.85 lb (1.75
kg); FSW-30: 6.8 lb
(3.1 kg).
Agency Approvals: CE.
FSW Bulletin 12/2/03 3:12 PM Page 1
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