Tecfluid LC40 Series - Manual (Page 3)

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.
• Maximum and minimum level control.
2. RECEPTION
The LC40 level detectors are supplied individually packed for protection during transport .
On reception of the level detector, check:
• That the float pivots freely in the fork that supports it.
• That the pivot shaft has the two split pins, one on each end.
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).
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.
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