Xylem MM 615D User Manual
Series FS1
High Sensitivity
Liquid Flow Switch
INSTRUCTION MANUAL
MM-615D
SPECIFICATIONS
imum Liquid Pressure: 100 psi (7 kg/cm
Max
uid Temperature Range (T
Liq
Ambient Temperature Range (T
Electrical Enclosure Rating: N Type 1 (IP 21) (All models except “W”)
2 - 225˚F (0 - 107˚C)
): 3
L
2 - 120˚F (0 - 49˚C)
): 3
S
EMA
N MA Type 4X (IP 56) (“W” models)
E
2
)
Maximum Velocity: 10ft/sec (3M/sec)
Pipe Connection Thread Size:
E: Switch on ‘G’ models is rated for 750mA @ 24VAC and 24VDC. This
NOT
1
/2” N
PT (All models except “J”)
1
SPT (“J” models)
/2” B
switch should only be used on low voltage (24 VAC or less) or millivolt systems.
ELECTRICAL RATINGS
Mot
or 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
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
Mode of Operation
Flow No Flow
Settings gpm (lpm) gpm (lpm)
Factory or
Minimum 0.41 (1.55) 0.24 (.91) 25
Maximum 1.81 (6.85) 1.28 (4.84) (95)
Values are ± 10%
NOTE: “L” models are set at the factory to prove flow at 1.7 gpm. The setpoint should not be adjusted in the
field without consulting factory.
Max. Flow Rate
gpm (lpm) w/o
Paddle Damage
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.
PSI Flow Switch Capacity - FSI
DIFFERENTIAL
P 10 20 30 40 50 60 70 80 90
PRESSURE
GPM
CAPACITY
8.35 11.50 13.60 15.75 17.75 19.75 21.25 23 24.25
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.
1/2" PIPE
FLUID FLOW
5 x D
MINIMUM
D= PIPE DIAMETER
5 x D
MINIMUM
D
3
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