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AMS FS1790 Installation Operating & Maintenance Manual Download Page 2

1

AMS-S-082/DS/09.2016 (ISSUE 2)

©AM SENSORS LTD

Contents

1.   Safety Instructions  .................................................. 1

2.   Functional Description  ..........................................  2

3.   Area of Application  ..............................................  3

4.   Installation  ............................................................  4

5.   Electrical Connections  .........................................  7

6.   Commissioning / Functional Testing  .................... 11

7.   Maintenance  ...................................................... 12

8.   Technical Data  .....................................................13

9.   EC Declaration  .................................................... 14

1. Safety Instructions

Read these instructions before installing the ATEX Group I Horizontal float switch 
and placing it into operational service.

These instructions are intended for the personnel responsible for the installation 
and commissioning of the float switch.

Comply with the relevant safety regulations when using the equipment.

Do not install the float switch in the immediate vicinity of any strong 
electromagnetic fields (recommended min distance >1 meter).

Do not subject the float switch to heavy mechanical loads.

AMS-S-082/DS/09.2016 (ISSUE 2)

©AM SENSORS LTD.

WARNING:

Failure to comply with the instructions described within this manual 
can lead to malfunction or damage to the switch and if the switch is 
incorrectly installed the ATEX certification may be void.

Summary of Contents for FS1790

Page 1: ...INSTALLATION OPERATING MAINTENANCE MANUAL HORIZONTAL FLOAT SWITCHES TYPE FS1790 ...

Page 2: ...se instructions are intended for the personnel responsible for the installation and commissioning of the float switch Comply with the relevant safety regulations when using the equipment Do not install the float switch in the immediate vicinity of any strong electromagnetic fields recommended min distance 1 meter Do not subject the float switch to heavy mechanical loads AMS S 082 DS 09 2016 ISSUE ...

Page 3: ...ontacts will change over The float arms have an in built magnetic which operates the reed switch contact through the wall of the guide tube Thus the switching operation is without direct contact to the liquid free of wear and tear and does not require any power supply Benefits of using AMS Magnetic Float Switch Technology i Over 40 years of experience a proven design Ex Alan Cobham ii Simple relia...

Page 4: ...o not attempt to install this switch design in the vertical position as the float will not operate the reed switch Prior to installing the float switches confirm that the vessel has the correct mounting arrangement for the float switch The suggested method of mounting the float switch to the vessel is shown in Fig 1 Insert the float arm assembly Item 3 Fig 2 through the Ø68mm vessel aperture ensur...

Page 5: ...FS4825 to the ATEX Group I float switch using the M8 x 35mm Bolts Nuts and washer supplied with the flange ensuring that a suitable gasket is installed between the flange faces not supplied as shown below The cable gland flange FS4825 is designed to take a M25 x 1 5 ATEX rated cable gland install the cable gland onto the cable gland flange FS4825 ensuring that the manufactures instructions are str...

Page 6: ...g Once the switches have been terminated to the system gently insert the terminals and terminal base Item 3 back into the float switch body replace the lid Item 2 onto the body making sure that the O ring is not trapped Replace and tighten the 4 off M10 socket headed screws Item 1 to no greater than 10 Lbs torque 5 3 Switch Wiring Configuration Single pole double throw switches options are termina...

Page 7: ...using the shipping bolts to hold it assembled ii Remove the terminal cover lid as described in section 5 2 iii Connect the continuity checker to the wires for the switch switch configuration as shown in section 5 3 iv Lift the float in an upwards direction and confirm that the switch changes state v Let the float gently return to the original position horizontal to the float arm baffle plate and c...

Page 8: ...the unit and remove any deposits likely to hinder the float operation AMS recommend that the ATEX Group I Horizontal float switch FS1790 is periodically functional tested every 6 months to confirm operation if the process medium contains heavy soiling or coarse suspended matter it is recommended to reduce this testing interval to confirm that the float still has free movement and is not obstructed...

Page 9: ... AM SENSORS LTD 14 15 AMS S 082 DS 09 2016 ISSUE 2 EC Declaration ...

Page 10: ... possible lack of information in this document AMS reserve all rights in this document and in the subject matter and illustrations contained therein Any reproduction disclosure to third parties or utilization of its contents in whole or in parts is forbidden without prior written consent of AMS AMS S 082 DS 09 2016 ISSUE 2 AM Sensors Ltd Chedzoy Lane Chedzoy Bridgwater Somerset TA7 8QS t 44 0 1278...

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