Tecfluid LC40 User Manual

Level Switch

Series

instrumentation

for fluids

LC40

Instructions Manual

R-MI-LC40 Rev.:3 English Version

TABLE OF CONTENTS

1. INTRODUCTION .................................................................................... 3

2. RECEPTION ........................................................................................... 3

3. INSTALLATION ...................................................................................... 3

4. ELECTRICAL CONNECTION ................................................................ 4

3.1 AMD ............................................................................................ 4

3.2 AMM ............................................................................................ 4

3.3 AMR ............................................................................................ 4

5. MAINTENANCE ...................................................................................... 4

6. TECHNICAL CHARACTERISTICS ........................................................ 5

7. DIMENSIONS ……………..…….............................................................. 6

2

1. INTRODUCTION

The LC40 series are level limit switches based on a float.
The changes in level are followed by the float mounted on a pivoted arm.
On the opposite end from the float there is a sealed permanent magnet which acts on

another magnet, situated in the inside of the electrical housing, that acts on the limit
switches.

The limit switches can be electric or pneumatic, depending on the needing of the
installation.

Applications:

• Liquid storage tanks

• Hot water storage.

• Control of steam condensates storage tanks .

• On-Off of pumps.

2. RECEPTION

The LC40 level detectors are supplied individually packed for protection during transport .
On reception of the level detector, check:

Before installation, it is recommended to check the limit switch.
To do this, unscrew the electrical housing cover to gain access to the electrical

connections.
Move manually the float from the bottom stop to the top stop of the fork.
The signal at the electrical connection terminals will vary according to the float’s position

(with the AMM and AMR switches this can be checked easily using a multimeter in
continuity mode).

• Maximum and minimum level control.

• That the float pivots freely in the fork that supports it.

• That the pivot shaft has the two split pins, one on each end.

3. INSTALLATION

The models designed to be mounted in the side of the tank (horizontal installation) should
be installed as in figures in page 6.

The mounting position must be so that the float can move freely in a vertical plane.
The LC40V and LC40VR models should be installed in the top of the tank (see page 7).

Important:

Check that the working pressure is not above that specified on the instrument’s
identification label.

Check that the ambient and liquid temperatures are within the limits specified on page 5.

3

4. ELECTRICAL CONNECTION

The limit switches of the LC40 series are provided of a terminal block in order to connect
the cables.

Before starting the electrical installation, make sure that the cable to be used is the right
size for the PG9 cable gland. This will guarantee that the instrument is perfectly sealed (it
is recommended the use of shielded pair wiring with an exterior diameter between 5 and 8
mm. The section of the cables inside will be 0,25 or 0,5 mm

2

).

Peel the outside insulation to free the inner cables. It is recommended to tin the ends of
the wires to avoid loose ends. Pass the cables through the cable glands and screw down
in the corresponding positions of the terminal strip. Once the wiring is finished make sure
that the cables are well gripped by the cable glands to maintain the degree of protection.

The different connection diagrams depending on the limit switch are the following:

3.1 AMD

1/Brown

2/Blue

3.2 AMM

3.3 AMR

5. MAINTENANCE

Mechanical: Maintain the pivot shaft clean and remove dirt from the fork.
There is no preventive maintenance for the electrical or pneumatic part.

4

6. TECHNICAL CHARACTERISTICS

• Mounting: Vertical / Side mounting.

• Fittings: DIN 2501 DN65 PN 16flanges

Others on demand

• Minimum liquid density: 0.45 kg/l

• Liquid viscosity: maximum 3.000 mPa.s

• Repeatability: ±3 mm of the level .

• Materials: EN 1.4404 (AISI-316L)

On demand: PVC, PP, PTFE, PVDF

• Electrical housing: Metal alloy aluminium
On demand: EN 1.4401 (AISI-316), PP, PTFE

• Pressure: PN16 (PN10 for plastic)

On demand: PN40 ... PN400

• Liquid temperature: Depends on the following table

Materials Liquid temperature range

temperature (1)

+ thermal housing

EN 1.4404 (AISI-316L) -50ºC…...150º C 300º C

PVC 0ºC…..50º C -------

PP -20ºC…..90ºC -------

PTFE -20ºC…..150º C -------

PVDF -20ºC.....150º C -------

Maximum product

(1) The liquid working temperatures are given for an ambient temperature of 20ºC.

• Ingress protection IP65

• Limit switch characteristics

Maximum

Switch System Characteristics

ambient

temperature

AMM

Snap action switch

C/NO/NC

AMD Inductive NAMUR

AMR

AMP

Reed switch

C/NO/NC

Pneumatic

switch

250 V max.

3 A max.

max.. I > 2.2 mA

min. I < 1.1 mA

250 V max.

0.5 A max.

-25 to +85 ºC

-25 to +85 ºC

-25 to +85 ºC

2 ... 6 bar 0 to +50 ºC

Complies with 97/23/EC Directive for pressure equipment.
This equipment is considered as being a pressure accessory and NOT a safety accessory

as defined in the 97/23/EC Directive, Article 1, paragraph 2.1.3.

5

7. DIMENSIONS
Horizontal installation

LC40/INOX

LC40-BA/INOX

Horizontal installation with accessories

LC40-A21/INOX

6

H mm 150 200 300 400
L mm 250 350 450 600

Vertical installation

LC40-V/INOX

H average distance for actuation
H max: 1000 mm

LC40-03/PVC, LC40-05/PTFE, LC40-09/PP, LC40-00/PVDF

LC40-VR/INOX

H maximum-minimum level differential
H max: 1875 mm - ØB

FLANGE DIMENSIONS (DN65)

STAINLESS STEEL

PN D k L x nº b

16 185 145 18 x 4 18
40 185 145 18 x 8 22

64 205 160 22 x 8 26
100 220 170 26 x 8 30
160 220 170 26 x 8 34
250 230 180 26 x 8 42

PN D k L x nº b

PLASTIC

10 185 145 18 x 4 18

7

WARRANTY
Tecfluid S.A. GUARANTEES ALL ITS PRODUCTS FOR A PERIOD OF 24 MONTHS, after

consignment, against all defects in materials and workmanship.
This warranty does not cover failu res which can be imp uted to mis use, use in an application different

to that specified in the order, the result of service or modification by un-authorized persons, bad
handling or accident.

This warranty is limited to cover the repair or replacement defective parts which have not been
damaged by misuse.

This warranty is limited to the repair of the equipment and all further and eventually following
damages are not covered by this warranty.

Any consignment of equipment to our factory or distributor must be previously authorised. The
consignment should be done with the equipment well packed, clean of any liquids, grease or
hazardous materials.
Together with the equipmen t, a note should be enclosed indicating the failure observ ed, the name,
address and telephone number of the sender.

SHIPPING
In the event of damages during shipping, claim directly to the carrier over a period of less than 24
hours. Tecfluid is not responsible for any damage caused during the shipment of material.

TECFLUID, S.A.
Narcís Monturiol, 33
E-08960 Sant Just Desvern
Tel. + 34 93 3724511 - Fax + 34 93 4734449
E-mail: [e-mail]
Internet: www.tecfluid.com

The technical data in this document is subject to modification without notification, if the technical innovations in the product or
manufacturing processes so require.