Xylem MM 619F Series FS6 Flow Switch - Manual (Page 8)

Xylem Inc.
8200 N. Austin Avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
www.mcdonnellmiller.com
McDonnell & Miller is a trademark of Xylem Inc. or one of its subsidiaries.
MAINTENANCE
SCHEDULE:
• Inspect and clean 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. Flow switch may be located to sense flow in
polluted (scale, rust, sludge, etc.) water. Relocate
switch to a pipe that senses flow of non-polluted
water.
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. Flow switch may be located to sense flow in
polluted (scale, rust, sludge, etc.) water. Relocate
switch to a pipe that senses flow of non-polluted
water.
3. Flow Switch Does Not Deactivate
Solution:
a. Measure flow rate and match with velocities shown
in flow rate chart. Flow switch must prove flow
before it can indicate no flow.
b. Flow switch may be located to sense flow in
polluted (scale, rust, sludge, etc.) water. Relocate
switch to a pipe that senses flow of non-polluted
water.
© 2014 Xylem Inc. MM-619F March 2014 Part No. 210413