Xylem MM 615D Series FS1 High Sensitivity Liquid Flow Switch - Manual (Page 7)

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a. Place cover on flow switch and turn on power. Initiate fluid
flow through the system. Observe the device being
activated by the flow switch to determine if device is
operating as required.
b. Turn off fluid flow to determine if device is operating
as required.
c. Repeat initiating and turning off fluid flow several times to
test flow switch and device for proper operation.
- If operating as required, put system into service.
- If not operating as required, flow switch may need
to be adjusted.
OFF
ON
SECTION 4 - Testing
STEP 5 - Adjustment
1/2 " Pipe Connection
Adjusting Screw
Adjustment is necessary only if required flow/no
flow setpoints are above factory set minimum.
a. Turn off power.
b. Locate adjusting screw on bottom of unit.
c. Turn adjusting screw clockwise (1/8 turn) to
increase setpoint.
d. Turn on power.
e. Test the operation of the flow switch after
each adjustment.
IMPORTANT: Do not attempt to lower flow switch
setpoint from original factory minimum setting.
Lowering (turning adjusting screw counterclock-
wise) the setpoint from original factory setting
may cause erratic flow switch operation.