Owner manual
Step Six
INSTALLATION
Step Seven
WIRING
When using any type of fitting, the orientation as well as the insertion
depth of the flow switch in the pipe is critical. See the diagram below
for the recommended orientation depth.
The AT1_ series flow switch when installed must always be in con-
tact with the liquid being measured. The AG1_ series flow switch
when installed must never be submersed in liquid. Both flow switch-
es feature a 3/4" NPT threads which will allow it to be used with var-
ious types of fittings. Be sure to check the insertion depth of the flow
switch in the fitting after it is installed. See the diagram below for the
recommended insertion depth.
WARNING
The flow switch tips have a thin plastic wall which may be dam-
aged if dropped or installed improperly.
The AT17 and AT18 flow switches are designed for use in liquid.
For best results, avoid installing the AT1_ where bubbles are pre-
sent or where the tips of the switch may be out of the liquid.
The AG17 and aG18 flow switches are designed for use in gas
applications. For best results, avoid installing the AG1_ where it
may be submersed in liquid.
Note: Always install the Viton gasket with all versions of the
AT1_-_634 and AG1_-_634. The G threaded version will not
seal unless the gasket is properly installed.
1/8 Pipe ID min.
Pipe ID
Acceptable
Insertion Range
Wiring to a Flowline Controller:
LC30 Series Controller
LC80 Series Controller
INVERINVERTT +/- +/-
LALATCHTCH
DELADELAYY
ACAC
ACAC
GNDGND
NCNC
CC
NONO
RR
PP
Input 1AInput 1A
(S)(S)
(-)(-)
115 VAC
220 VAC
(+)(+)
Green
Black
Shield - Not Used
White
STANDARD
CONTROLLER
R E L A Y 1 R E L A Y 2
P O W E R
INPUT 1 INPUT 2A INPUT 2B
-
+
-
+
INV E R T
DEL A Y
INV E R T
DEL A Y
LATCH
ON
OFF
Green
Red
White
Black
Not Used - Shield
Supply Voltage: The supply voltage to the Switch-Pro™ flow
switch should never exceed a maximum of 36 VDC. Use controllers
or power supplies, with a minimum output of 12 VDC or a maximum
output of 36 VDC.
Required Cable Length: Determine the length of cable
required between the Switch-Pro™ flow switch and its point of ter-
mination. Allow enough slack to ensure the easy installation, removal
and/or maintenance of the sensor. The cable length may be extended
up to a maximum of 1000 feet, using a well-insulated, 14 to 20 gauge
shielded four conductor cable.
Wire Stripping: Using a 10 gauge wire stripper, carefully remove
the outer layer of insulation from the last 1-1/4" of the sensor's cable.
Unwrap and discard the exposed foil shield from around the signal wires,
leaving the drain wire attached if desired. With a 20 gauge wire stripper,
remove the last 1/4" of the colored insulation from the signal wires.
Signal Output (Relay switching): Allows the sensor to
switch a small load on or off directly, using an internal 1A relay [120
VAC/VDC or (CE: 60 VAC/VDC)]. The NO/NC status is set by the
polarity of the voltage feeding the red and black wires. The green
wire is the common for the relay and the white wire is the NO or NC,
depending on the polarity of red and black.
Normally Open Wiring:
Red
Black
Shield
Ground
24 VDC
Power Supply
+
-
Multimeter
(Continuity)
-
+
White
Green