Omega Products LV-1301 Installation Manual
Installation and Maintenance
LV-1301
Liquid Level Switches
M-4361/0207
Installation Instructions:
Float Material
Stem & Fitting Material
Other Wetted Materials
Max. Operating Temp.
Max. Operating Pressure
Switch Type, Rating
Float S.G.
304 SS
304 SS
Epoxy
125ºC
100 PSIG
*
0.6
LV-1301 Specifications:
These units are intended to be mounted into the
side of a tank for sensing high, low or intermediate
levels. They are constructed of corrosion resistant
materials throughout. They feature an SPDT switch
to simplify wiring of control circuits.
MAINTENANCE
1. Switch Adjustment – The switch is set at the factory for
correct operation. Over time it may be necessary to
adjust it due to wear or other factors. There are two
different switch adjustments and they are done as
follows:
1.1 Lateral Adjustment
1.1.1 Loosen the 2 nuts that secure the switch
mounting bracket to the plate.
1.1.2 Move the bracket left or right to center the
magnet holder (on the end of the switch arm) on
the flat on the bottom of the fitting.
1.1.3 Tighten the nuts.
1.2 Vertical Adjustment
1.2.1 Loosen the 2 screws that secure the switch to
the bracket.
1.2.2 Move the switch up or down so that the switch
arm is parallel with the flat on the fitting and the
magnet holder is against the flat. You should feel
resistance from the internal spring in the switch,
but it must not be pushed down so far that the
switch has operated.
1.2.3 Check for correct operation of the switch, then
tighten the screws.
2. Float Removal & Replacement – If it becomes
necessary to replace the float, the float can be unscrewed from its shaft. To remove the float:
2.1 Heat the end of the float shaft with a heat gun, or
equivalent, to break the adhesive bond.
2.2 Put a 7/32” open-end wrench on the flats at the float
end of the shaft and grasp the float with a strap
wrench (or similar tool) and un-screw the float,
turning one tool against the other.
2.3 When reinstalling the float, apply LocTite 242 or a
suitable thread locking compound to the threads
before assembly.
3. Disassembly & Cleaning – In applications where there
is a large amount of contamination in the fluid, it may be
necessary to clean the switch mechanism periodically.
This is done by:
3.1 Removing the retaining ring from the float side of the
fitting.
3.2 Then, work the Float and Pivot assembly out of the
fitting, being sure to catch the locating pin
(1/8 dia. X 1/4” long).
3.3 If necessary, the pivot shaft and bushing are
disassembled by removing the pivot pin and
separating the 2 parts (Be sure to note the
orientation of the notch in the pivot bushing to the
flat side of the inner end of the shaft).
3.4 Clean the parts and the inside of the switch body
with a suitable cleaning solution.
3.5 Re-assemble all of the float and pivot components.
Make sure that the mechanism moves freely after reassembly. Be sure that the notch in the pivot bushing
is toward the float and the notch is on the same side
as the flat on the inner end of the shaft.
3.6 Insert the pivot assembly into the fitting, being
sure to align the notch in the pivot bushing with
the mating notch in the fitting.
3.7 Insert the locating pin into the notch and reinstall the
retaining ring.
3.8 Test operation as described in Installation step 6.
Level Switch Maintenance:
ELECTRICAL RATINGS:
20A @ 125, 250, or 480 VAC
10A @ 125 VAC INDUCTIVE
1 HP @ 125 VAC, 2 HP @ 250 VAC
1/2A @ 125 VDC, 1/4A @ 250 VDC
1. Remove the switch cover by removing the (6) nuts that
secure it and lifting the cover and its gasket off.
2. Unthread the brass locknut that secures the switch and
plate to the fitting assembly while moving the base plate
along with the nut as you unscrew it. Continue until the nut
is past the end of the fitting and you can pull the
base plate off the fitting. Be sure to save the gasket that
is found on the fitting.
3. Apply a suitable thread sealant to the 1-1/2” NPT thread on
the float side of the fitting.
4. Feed the float through the tank port until the fitting
engages the port threads. Thread the fitting into the port
and tighten so that the flat on the outside threaded end
of the fitting is facing
down
+/- 15º. This can be checked
by holding a small level against the flat.
5. Re-install the switch and base plate and locknut to the
outside end of the fitting, in the same manner as described
in step 2. Be sure to reinstall the gasket over the threaded
end of the fitting first! Be careful to guide
the switch arm so that the magnet holder on the end
goes against the flat on the fitting. Snug the locknut to
the fitting using a punch or screw driver (in one of the
notches) and a hammer.
6. Connect a continuity tester across either switch contact.
Move the float upwards. Verify that the switch operates
before the float reaches the end of its travel. Repeat this
test several times.
7. If the switch does not operate correctly, it can be
adjusted by slightly loosening the (2) screws that attach
it to the bracket and moving it up or down to get proper
operation. Be sure to keep the switch arm parallel to the
flat on the fitting. Re-test to be sure that the switch is
operating correctly. Re-tighten the screws.
8. The cover gasket should be placed over the threaded studs
in the base plate.
9. Connect your wiring to the switch terminals. All electrical
wiring must be done in accordance with all applicable local
codes and requirements. The cover must be drilled as your
installation requires for connecting conduit(s).
We suggest the use of flexible conduit between the
switch and fixed conduit, if possible.
10. Place the cover over the studs and secure it with the
supplied nuts. Tighten nuts evenly so you do not damage
the gasket!
NOTE:
If the switch is mounted into a port that is larger than 1”,
using a bushing or other adapter, verify that the float will not
be obstructed from moving through its full travel
before
installing it into the tank.
*
Electrical Ratings listed below
NOTE: These switches should be installed in environments
that are free of excessive shock loads and highly
contaminated fluid.
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