Magnetrol International Level Switch C10

Disconnect power to the control

Disconnect power wiring from switch assembly

Swing magnet assembly in and out by hand to check for any sign of binding

If binding exists, adjust magnet position

Check installation of control to be certain it is within the specified three degrees of vertical

Check switch continuity with ohmmeter

NOTE: As a matter of good practice, spare switches should be kept on hand at all times

If switch mechanism is operating satisfactorily, proceed to check sensing unit

Warning: This maintenance check requires trained personnel with PPE!

Dry contact switches inspected for excessive wear on actuating lever or misalignment of adjustment screw

DO NOT operate your control with defective or maladjusted switch mechanisms

Level controls exposed to excessive heat or moisture?

Insulation on electrical wiring checked for brittleness

Terminal screws checked for looseness due to vibration

Air (or gas) lines checked for cracks or looseness at connections due to vibration

NOTE: As a matter of good practice, spare switches should be kept on hand at all times.

Sign off on the level switch maintenance

Caution: With electrical power on, care should be taken to avoid contact with switch leads and connections at terminal block.

Reconnect power supply and carefully actuate switch mechanism manually, using a non-conductive tool on electrical switch mechanism, to determine whether controlled equipment will operate.

If controlled equipment responds to manual actuation test, trouble may be located in level sensing portion of the control (displacers, spring, stem, and magnetic attracting sleeve).

NOTE: Check first to be certain liquid is entering tank or vessel. A valve may be closed or pipe line plugged.

Caution: Be certain to pull disconnect switch or otherwise assure that electrical circuit(s) through control is deactivated.

Close operating medium supply valve on controls equipped with pneumatic switch mechanisms

Disconnect wiring from supply side of switch mechanism(s) and remove electrical conduit or operating medium line connections to switch housing.

Relieve pressure from vessel and allow unit to cool.

Remove switch housing assembly by loosening set screws located at the bottom of the housing base.