MN301310 Rev A
5
|
Safety Precautions
Step Three
About Manual:
PLEASE READ THE ENTIRE MANUAL PRIOR TO INSTALLING OR USING THIS
PRODUCT. This manual includes information on the mini-float level switch, model LV10-_2_1 and LH25-
_201. Please refer to the part number located on the sensor label to verify the exact model which you have
purchased.
User’s Responsibility for Safety:
Flowline manufactures a wide range of liquid level switches and
technologies. While each of the these switches are designed to operate in a wide variety of applications, it
is the user’s responsibility to select a switch model that is appropriate for the application, install it properly,
perform tests of the installed system, and maintain all components. The failure to do so could result in
property damage or serious injury.
Proper Installation and Handling:
Because this is an electrically operated device, only properly trained
staff should install and/or repair this product. Use a proper sealant with all installations. Never over tighten
the sensor within the fitting, beyond a maximum of 80 inch-pounds torque. Always check for leaks prior to
system start-up.
Material Compatibility:
The LV20 and LH25 series mini-float level switches are available in two wetted
material versions. The LV20-12_1 mini-float vertical switch is made of Polypropylene (PP) with a
Polyvinylchloride (PVC) cable and the LH25-1201 mini-float horizontal switch is made of Polypropylene
(PP) with a Polymeric cable. The LV20-52_1 mini-float vertical switch and the LH25-5201 mini-float
horizontal switch are made of Polyvinylidene Fluoride (PVDF) with a Tetrafluoroethylene (TFE) cable.
Make sure that the switch application is compatible with the liquids. To determine the chemical
compatibility between the sensor and its application liquids, refer to the Compass Corrosion Guide,
available from Compass Publications.
Temperature and Pressure:
The LV20 series switch is designed for use in application temperatures up to
80˚C, and for use at pressures up to 10 psi (0.7bar). The LH25 series switch is designed for use in
application temperatures up to 105˚C, and for use at pressures up to 100 psi (6.9bar).
Wiring and Electrical:
The supply voltage used for the LV20 switch should never exceed 240 volts AC @
50 VA for the LV20-_2_1. For the LH25 series, the supply voltage should never exceed 240 Volts AC @
30VA. Electrical wiring of the switch should be performed in accordance with all applicable national, state,
and local electrical codes.
Flammable, Explosive and Hazardous Applications:
The LV20 and LH25 series mini-float level
switches should not be used within flammable or explosive applications unless properly connected to an
approved control device. In hazardous applications, use redundant measurement and control points, each
having a different sensing technology. Refer to the National Electrical Code (NEC) for all applicable
installation requirements in hazardous locations.
Warning
Avoid installing the mini-float level switches in magnetized metal tanks. Doing so will activate the internal reed
switch.
