APG FLR User Manual

PRODUCTS

AUT OMATION

Operator’s Manual

GROUP, INC.

FLR

Series

Magnetic Float Sensors

9003284

Rev. A5, 10/09

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Automation Products Group, Inc.

FLR Series Rev. A5, 10/09

Table of Contents

Warranty ......................................................................................... 3

Description...................................................................................... 4

Installation ................................................................................... 5-6

Wiring.............................................................................................. 7

Circuit Pr otection ........................................................................... 8

Field Adjustment of Actuation Point.........................................9-21

Inspection & Maintenance ............................................................ 22

Technical Notes............................................................................. 22

Specifications ................................................................................ 23

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Rev. A5, 10/09 FLR Series

• Warranty and W arranty Restrictions

APG warrants its products to be free from defects of material and workmanship
and will, without charge, replace or repair any equipment found defective upon
inspection at its factory, provided the equipment has been returned,
transportation prepaid, within 24 months from date of shipment from factory .

THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER
WARRANTIES NOT EXPRESSL Y SET FOR TH HEREIN, WHETHER
EXPRESSED OR IMPLIED BY OPERATION OF LAW OR OTHER WISE
INCLUDING BUT NOT LIMITED T O ANY IMPLIED WARRANTIES OF
MERCHANT ABILITY OR FITNESS FOR A PAR TICULAR PURPOSE.

No representation or warranty, express or implied, made by any sales
representative, distributor, or other agent or representative of APG which is not
specifically set forth herein shall be binding upon APG. APG shall not be liable
for any incidental or consequential damages, losses or expenses directly or
indirectly arising from the sale, handling, improper application or use of the
goods or from any other cause relating thereto and APG’s liability hereunder, in
any case, is expressly limited to the repair or replacement (at APG’s option) of
goods.

Warranty is specifically at the factory. Any on site service will be provided at
the sole expense of the Purchaser at standard field service rates.

All associated equipment must be protected by properly rated electronic/
electrical protection devices. APG shall not be liable for any damage due to
improper engineering or installation by the purchaser or third parties. Proper
installation, operation and maintenance of the product becomes the
responsibility of the user upon receipt of the product.

Returns and allowances must be authorized by APG in advance. APG will
assign a Return Material Authorization (RMA) number which must appear on
all related papers and the outside of the shipping carton. All returns are subject
to the final review by APG. Returns are subject to restocking charges as
determined by APG’s “Credit Return Policy”.

Automation Products Group, Inc.

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3

FLR Series Rev. A5, 10/09

Permanent Magnet

Float Travel-Stop

Float

Stem

Reed Switch

• Description

The FLR series instruments contain reed switches in the stem and permanent
magnets in the floats. As the float rises or falls with the level of the liquid, the
magnet inside the float act on the reed switch inside the stem to provide the
SPST switching action.

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Rev. A5, 10/09 FLR Series

• Installation

- Unpacking -

When unpacking the instrument, exercise care not to subject the instrument to
mechanical shock. After unpacking, visually inspect the instrument for
damage.

- Environment -

The FLR series sensors should be installed in an areas indoor or outdoor
which meets the following conditions:

1. Non-hazardous area.

2. The medium temperature does not exceed -400F to 1850F (-140C to 850C).
NOTE: It is recommended that a sun shield be installed over the housing if
exposed to direct sunlight.

3. Relative humidity up to 100%

4. Pollution Degree 2

5. Measurment Category II

6. Altitude 2000 m or less.

7. Locate the sensor away from strong magnetic fields such as those
produced by motors, transformers, solenoid valves, etc.

8. The medium is free from metallic substances and other foreign matter.

9. No corrosive gases such as NH3, SO2, Cl2, etc.

10. No excessive vibration

11. Ample space for maintenance and inspection.

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FLR Series Rev. A5, 10/09

Stilling Tube

Inflow Inflow

Spacer

• Installation

- Location -

Do not locate the FLR series sensor near inlets/outlets.
If there is surface wave action, then use a time-delay relay or stilling tube. If a
stilling tube is used, drill vent holes in the tube and use a spacer to assure the
float has free travel inside the tube.

Wave action may cause switch to chatter. Use a stilling tube or time-delay

- Mounting -

The FLR can be mounted up to 300 from vertical.

1. Flange Mounting
Provide the compatible mating flange on the tank and install using a suitable
gasket.

2. Plug Mounting
Provide the compatible female boss on the tank and install the FLR with a
suitable gasket, O-ring, or thread tape.

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relay to prevent switch chatter.

Rev. A5, 10/09 FLR Series

L1

L2

L3

L4

BlackBlack White White Red Red Green Green

Wiring Color

L1

L1
L2
L3

L4
L5

L6
L7

L2

L3

L4

L5

L6

L7 Com.

Blk x 2
Blk x 2
Blk x 2
Blk x 2

Black
Black
Black

Wh x 2
Wh x 2
Wh x 2

White
White
White

Red x 2
Red x 2

Red
Red
Red

Grn x 2

Green
Green
Green

Yellow
Yellow
Yellow

Brown
Brown

Grey
Grey
GreyBlue

Number
of
Levels

L1 L2 L3 L4 L5 L6 L7

Common

Black White Red Green GreyBlueBrownYellow

• Wiring

- Wiring for 1 to 4 switches

- Wiring for greater than 4 switches

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7

FLR Series Rev. A5, 10/09

L

C

R

E

C = I
R = Approx.

10 x I (I + 50/E)

E

Protecting Circuit Using CR

Protecting Circuit Using Varistor

Protecting Circuit Using Diode

2

/10 (uF)

• Circuit Protection

W ARNING!

DO NOT EXCEED CONT ACT RA TINGS! When an inductive load is used
(e.g. a motor, a coil, or an electromagnetic relay), a back electromotive
force of several hundred volts (energy stored in the inductance) arises
when the contacts are opened. This results in considerable decrease in
contact life. The same result arises even when a resistive load is used
with a high voltage or a large current. The figures below show circuits for
protecting the reed switch(s) from the back electromotive force.

Code A & B Switches

Max. contact capacity 70 VA AC,
Max. switching current 220 V AC 0.5 A, 120 VDC 0.5 A

Code C Switches

Max. contact capacity 110 VA AC,
Max. switching current 220 VAC 0.5 A, 115 VDC 0.5 A

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Rev. A5, 10/09 FLR Series

• Field Adjustment Of Actuation Point(s)

The FLR sensors are designed to allow field adjustments of the actuation
points by moving the floats and reed switches. This section contains two
procedures for making field adjustments.

NOTE: FLR units without housings are hermetically sealed and cannot be
field adjusted.

Procedure one should be used under the following conditions:

a. You want to move the actuation point relative to the factory settings.
b. Their will be

closed).

Procedure two should be used under the following conditions:

a. The float stops have been loosened and moved without marking their

previous stem location.

b. The switching logic needs to be reversed (normally open/normally

closed).

c. You want to move the actuation point independant of the factory settings

no change to the switching logic (normally open/normally

Procedure One:

1. Before making any adjustments to the FLR, mark the stem location of the
float stops that will need to be moved.

Automation Products Group, Inc.

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