Maintenance; Troubleshooting - Xylem FS-5 Installation & Maintenance Instructions Manual

MAINTENANCE

SCHEDULE:
• Inspect annually. Turbulent or high flow
velocity conditions may require more frequent
inspection and/or replacement.
• Replace flow switch every 5 years or 100,000
cycles, whichever occurs first.

TROUBLESHOOTING

Problem:
1. Flow Switch Does Not Operate
Solution:
a. Make sure power has been turned on to device
and flow switch.
b. Verify that flow rate is high enough for flow switch
to activate. Measure flow rate and match with
velocities shown in flow rate chart.
c. Check to see if plunger moves freely. Some system
piping disassembly may be required.
2. Flow Switch Operates Erratically
Solution:
a. Adjustment screw may have been turned below
original factory setpoint. Verify that flow rate is high
enough for flow switch to activate. Measure flow
rate and match with velocities shown in flow rate
chart.
b. Check to see if plunger moves freely. Some system
piping disassembly may be required.
3. Flow Switch Does Not Deactivate
Solution:
a. Check to see if plunger moves freely. Some system
piping disassembly may be required.
b. Measure flow rate and match with velocities shown
in flow rate chart. Flow switch must prove flow
before it can indicate no flow.
3500 N. Spaulding Avenue
Chicago, Illinois 60618
tel: 773 267-1600
fax: 773 267-0991
www.mcdonnellmiller.com
©1999 ITT Industries Inc.
Printed in U.S.A. 10-99 246716