E N G L I S H
ENGLISH
EN
This instruction sheet provides you with the information required
to safely own and operate your Little Giant product. Retain these
instructions for future reference.
The Little Giant product you have purchased is of the highest quality
workmanship and material, and has been engineered to give you
long and reliable service. Little Giant products are carefully tested,
inspected, and packaged to ensure safe delivery and operation. Please
examine your item(s) carefully to ensure that no damage occurred
during shipment. If damage has occurred, please contact the place of
purchase. They will assist you in replacement or repair, if required.
READ THESE INSTRUCTIONS CAREFULLY BEFORE
ATTEMPTING TO INSTALL, OPERATE, OR SERVICE
YOUR LITTLE GIANT PRODUCT. KNOW THE PRODUCT’S
APPLICATION, LIMITATIONS, AND POTENTIAL HAZARDS.
PROTECT YOURSELF AND OTHERS BY OBSERVING ALL
SAFETY INFORMATION. FAILURE TO COMPLY WITH THESE
INSTRUCTIONS COULD RESULT IN PERSONAL INJURY AND/
OR PROPERTY DAMAGE!
DESCRIPTION
The OS3 oil-sensing sump system is designed and approved for
the safe pumping, alarming, and monitoring of elevator sump pits,
transformer vaults, and leachate wells. The OS3 will activate a pump
to remove water from elevator pits in accordance with aSme a17.1.
The OS3 stops the pump before oil or other harmful substances
enter the water supply. Indicator lights will illuminate on the control
panel for the following: power, pump running, high alarm, high
oil, and pump overload (optional). The panel has a set of auxiliary
contacts that activate on power loss or high oil/water conditions.
These contacts can be connected to the OS3 remote alarm panel,
which contains audio/visual alarming along with auxiliary contacts
for connection to building automation system or Scada system.
When the water level rises to the STaRT probe, the pump turns on.
The pump remains on until the water level drops below the OFF
probe. The OFF probe senses air or oil and turns the pump off so
the oil layer will not be pumped out of the sump. If the liquid level
reaches the aLaRm probe and HIGH-LeVeL float, the system will
differentiate between water and oil and activate the remote alarm.
SAFETY GUIDELINES
WARNING: RISK OF eLecTRIcaL SHOcK. PLeaSe OBSeRVe
THe FOLLOWING SaFeTY GUIdeLINeS.
WARNING: Installation of the system must comply with all federal,
state and local codes, regulations and practices.
The system must be installed by qualified personnel familiar with
all applicable local electrical and mechanical codes. Refer to the
national electrical code (NFPa 70). Failure to properly install and test
this product can result in personal injury or equipment malfunction.
do not use with flammable or explosive fluids such as gasoline, fuel
oil, kerosene, etc. do not use in explosive atmospheres.
Use probe/float switch with water only.
do not handle the system with wet hands or when standing on a wet
or damp surface or in water.
disconnect all electrical service before working on or handling the system.
ensure that the incoming voltage matches the system voltage.
To prevent electrical shock and equipment malfunction, use only
with a pump supplied with a grounding conductor and grounding-
type attachment plug. Be certain to plug the OS3 panel into a
properly grounded, grounding-type outlet.
mount the control panel and alarm indoors. consult the manufacturer
for outdoor applications.
Use caution with models that use an overload relay. The pump
motor may start immediately when the overload is reset.
Secure the level sensor on a discharge pipe at a level that guarantees
partial pump submergence when water level is just below the OFF
probe. Failure to properly mount the level sensor may cause the
pump to activate even when oil is present in the sump.
CAUTION: Remove any float switch that is currently used or
supplied with the pump. If the float switch cannot be removed,
secure it so that it is always on.
OIL-SENSING
SUMP SYSTEM
MODEL OS3
Page 1 of 8
Franklin Electric Co., Inc.
P. O. Box 12010
Oklahoma city, OK 73157-2010
888.956.0000 • Fax: 405.947.8720
www.LittleGiantPump.com
FIGURE 1
Oil Film
Detection Level
Pump START
Level
Pump OFF
Level
120 V Outlet
120 V outlet
in elevator
equipment room
Elevator Sump
Control Panel
Remote alarm has additional
auxiliary contacts for building
alarm system.
Oil Alert
Remote alarm
8.82"
6.50"
4.02"
9.75"
5.25"
Mounting flange (1 of 2)
FIGURE 2
Form #998668
