Xylem MM 619F User Manual

Series FS6
Flow Switch

INSTRUCTION MANUAL

MM-619F

SPECIFICATIONS

Maximum Liquid Pressure: 100 psi (7 kg/cm2)

Liquid Temperature Range (T

Ambient Temperature Range (T

): 32 - 225˚F (0 - 107˚C)

L

): 32 - 120˚F (0 - 49˚C)

S

Electrical Enclosure Rating: Nema Type 1 (IP 21) (All models except “W”)

Nema Type 4X (IP 56) (“W” models)

Maximum Velocity: 10ft/sec (3M/sec)

Pipe Connection Thread Size:

3

/4” or 1” NPT (All models except “J”)

3

/4” or 1” BSPT (“J” models)

ELECTRICAL RATINGS

Motor Switch Rating (Amperes)

Voltage Full Load Locked Rotor Pilot Duty

120 VAC 7.4 44.4
240 VAC 3.7 22.2

125 VA at

120 or 240 VAC

50 or 60 cycles

2

FLOW RATES

FS6 VELOCITIES IN FPS

40

30

20

10

VELOCITY IN FEET PER SECOND

GPM CAPA

CITY

10 20 30 40 50 60 70

FS6-

3

/

4

"

PIPE

FS6-1"

PIPE

Flow rates required to activate the flow switch
are shown in chart below.These values were

calculated using clean water in a horizontal pipe.

Flow Rates

Pipe

Mode of Operation

Size NPT Flow No Flow
in. (mm) Settings gpm (lpm) gpm (lpm)

3

4

⁄

or Minimum .12 (.45) .06 (.23)

1 (25)

Values are ± 10%

90

80

70

60

50

40

30

20

DIFFERENTIAL PRESSURE

10

Factory or

(20)

Maximum 2.5 (9.46) 1.5 (5.68)

FS6 SERIES PRESSURE DROP

Max. Flow

Rate gpm (lpm)

w/o Paddle

Damage

70 (265)

Settings will vary when used to sense flow of other
fluids.

NOTE: THIS PRODUCT IS NOT INTENDED

FOR USE IN POTABLE WATER

APPLICATIONS.

NOTE: DO NOT USE LIQUID FLOW

SWITCHES ON SYSTEMS WITH
FLOW VELOCITY GREATER THAN
10 FEET (3M) PER SECOND.

INSTALLATION –

STEP 1 - Determine the Location of the Flow Switch

• The flow switch should be located in a horizontal
section of pipe where there is a straight horizontal

run of at least 5 pipe diameters on each side of the
flow switch.

• The flow switch must be installed in the upright
position as shown with arrow mark on side of casting
in the same direction as fluid will flow.

• Some system conditions that require more than 5
pipe diameters are high viscosity fluid and high fluid
velocity.

10 20

30 40 50 60 70

GPM CAPA

CITY

3/4" or 1" PIPE

5 x D

MINIMUM

D

5 x D

MINIMUM

D= PIPE DIAMETER

3

STEP 2 - Connecting the Flow Switch to Pipe

a. Apply pipe sealing compound or

PTFE

tape to the

pipe threads.

NOTE: Do not apply sealant to first threads as this
switch is grounded (earthed) via the pipe mounting.

b. Insert pipe threads into flow switch and turn 2

or 3 times until tight.

• Place one pipe wrench on hex fitting of flow
switch and one wrench on connecting piping.
Tighten to following torque values.

- 47 ft•lb (64 N•m) for 3/4” pipe

- 63 ft•lb (85 N•m) for 1” pipe

PTFE

• Repeat to connect pipe to opposite side of
flow switch.

4

STEP 3 - Electrical Installation

• To prevent electrical shock, turn off the electrical power before making electrical connections.

• To prevent an electrical fire or equipment damage, electrical wiring insulation must have a rating of
167˚F (75˚C) if the liquid’s temperature exceeds 180˚F (82˚C).

• To prevent electrocution, when the electrical power is connected to the flow switch, do not touch the
terminals.

• Make sure flow switch electrical cover is secured before turning on electric power.

Failure to follow this warning could cause property damage, personal injury or death.

WARNING

!

a. Cover Removal and Installation Procedure

For FS6 models with NEMA 1 Enclosure

• Using a flathead screwdriver, loosen but do not
remove the two cover screws and remove the cover
(A).

• Place the cover on the flow switch sliding the slots
behind the two loose cover screws. Push the cover
down into the flow switch and using a flat blade
screwdriver, tighten the cover screws to a torque of
10 lb•in (1.13 N•m).

For FS6-W models with NEMA 4X Enclosure

• Using flathead screwdriver, unscrew the six cover
screws and remove cover.

• Place the electrical connection cover on the flow
switch and insert the six cover screws. Tighten the
screws to a torque of 10 lb•in (1.13 N•m).

A

b. Electrical Conduit Connection

• Connect electric conduit to flow switch electrical enclosure.

• Follow accepted electrical practices when installing fittings
and making connections.

• Refer to and follow local codes and standards when
selecting the types of electrical fittings and conduit to
connect to flow switch.

5

c. Determine which switch action is required for the

flow switch.

• “Flow” means that the switch will close circuit
C.-N.O. and open circuit C.-N.C. when flow rate
is increased above setpoint of flow switch.

• “No Flow” means that the switch will open circuit
C.-N.O. and close circuit C.-N.C. when flow rate
is decreased below setpoint of flow switch.

C. N.O

FLOW

.

N.C.

C. N.O

.

NO FLOW

N.C.

d. Based upon the mode of operation (“Flow” or “No-

Flow”) required, complete the appropriate steps to
connect wires to flow switch. Use a Phillip’s head
screwdriver to loosen and tighten switch terminal
screws when attaching wires.

For “Flow” Mode of Operation (Fig. 1)

If the flow switch will be used to actuate a signal,
alarm or other device when flow occurs, connect
the wire from that device to the “N.O.” contact.
Connect the “Hot” power supply wire to “C” terminal.

For “No Flow” Mode of Operation (Fig. 2)

If the flow switch will be used to actuate a signal,
alarm or other device when no flow occurs, connect
the wire from that device to the “N.C.” contact.
Connect the “Hot” power supply wire to “C” terminal.

Common

(

Common

1

(

Normally

(

Flow
Closes
Circuit

open

Flow
Opens
Circuit

2

3

Nor

mally

(

(

closed

(

FS4-3

31

2

Fig. 1

HOT

LINE

LOAD

FS4-3

31

2

Fig. 2

LINE

HOT

LOAD

6

STEP 4 - Testing

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.

ON

OFF

STEP 5 - Adjustment

Adjustment is necessary only if required flow/no
flow setpoints are above factory set minimum.

a. Turn off power.

b. Locate adjustment lever on bottom of unit.

Note that lever will be perpendicular to flow
switch body.

c. Loosen adjustment lever screw but DO NOT

REMOVE.

d. Turn adjustment lever counter-clockwise to

increase setpoint. Maximum setting is with
adjustment lever parallel with flow switch body.

e. Tighten adjustment lever screw.

f. Turn on power.

g. Test the operation of the flow switch after

each adjustment.

ADJUSTMENT DATA

(All flow rates given in GPM - gallons per minute)

FLOW

Flow

0.12

No Flow

0.06

MINIMUM

ADJUSTMENT

Adjustment
Lever Screw

Flow

No Flow

MAXIMUM

ADJUSTMENT

The Flow Rates Shown
Are Averages, May
Vary –10%

2.5

1.5

7

MAINTENANCE

TROUBLESHOO

TING

SCHEDULE:

nspect and clean annually. Turbulent or high

• I
flow velocity conditions may require more
frequent inspection and/or replacement.

• Replace flow switch every 5 years or 100,000
cycles, whichever occurs first.

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 sw

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

r

iginal factory setpoint. Verify that flow rate is high

o

ough for flow switch to activate. Measure flow

en
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.

itch

3. Flow Switch Does Not Deactivate
Solution:

Me

asure flow rate and match with velocities shown

a.

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.

Xylem Inc.

8200 N.
Morton Grove, Illinois 60053
Phone: [phone]
Fax: [phone]
www.mcdonnellmiller.com

McDonnell & Miller is a trademark of

© 2014 Xylem Inc. MM-619F March 2014 Part No. 210413

Austin Avenue

Xylem Inc. or one of its subsidiaries.