OFFICINE OROBICHE S.p.A.
3/7
24010 Ponteranica (Bergamo) ITALY - via Serena, 10 - Tel. 0039/035/4530211 - Fax 0039/035/570546 - www.officineorobiche.it-e-mail:info@officineorobiche.it
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JULY ’14
Information subject to change without prior notice
IST/158-I
5. SETTING AT WORK
Make sure that the use of the instrument does not exceed the intended conditions of use (higher temperature and
pressure values, lower flow rates) and that the applied electrical rating value complies with the rating plate values.
Verify that the instrument operates a correct switchover, by making the fluid flow rate vary a few times.
6. CALIBRATION
The unit is not generally factory-set, hence it demands on-site setting.
(See maintenance, operation point setting paragraphs).
7.MAINTENANCE
We recommend inspecting the flow switch on a routine basis (every 6 months or so) to guarantee full efficiency.
All maintenance activities shall be performed when the instrument is off, not under pressure and emptied of its fluid, at
room temperature (in the event of instruments working at high or low temperature) and free from the contact’s feeding
voltage.
7.1 WARNINGS
- NEVER open the cover of the case before the power supply has been cut off;
- NEVER leave the case without its cover for more than the time absolutely necessary for the inspection;
- NEVER use the flow switch with pressure or temperature levels in excess of those indicated on the ratings plate;
- NEVER use the flow switch with mains voltage in excess of that indicated on the ratings plate;
- NEVER adjust or replace any components without having first read the relevant instructions carefully. If in doubt,
contact our Customer Services;
- NEVER lubrificate instrument components;
-If being used with high temperatures, adopt all the relevant precautions to guarantee that service personnel are
protected during maintenance operations.
7.2 PADDLE ROUTINE INSPECTION
Ensure the device is disconnected from the system and with all the fluid already drained out.
-Disconnect the voltage supply;
-Dismount the device from the piping by lifting the upper flange of the body or by unscrewing the union
(take care not to spoil or damage the rod and paddle);
- Inspect the piping and check it is clean from incrustation and/or deposit (if any such deposits are found, perform a
thorough cleaning);
-Dismount the rod assembly by removing the pin that connects the fork to the paddle and the latter to the stud bolt;
- Inspect the pit inside making sure it is free from incrustation (clean with care if necessary);
-Ensure the paddle and the rod are free from incrustation (if any are found, clean thoroughly) and do not show any
marks of wear or corrosion (if necessary, replace them);
-Place the rod assembly and the paddle back in place carefully;
-Manually lift and lower the paddle to ensure the whole set slides freely;
-Ensure the switching unit trips when the paddle is in the high flow-rate position.
7.3 REPLACING THE PADDLE
After dismounting the old paddle (see par.7.2), fit the new one and perform all the checks as detailed in par. 7.2.
7.4 ROUTINE INSPECTION OF THE CONTACTS
Cut off the power supply.
Open the cover and visually check that the tripping unit is not damaged or worn. Manually move the magnet and check
that the micro-switch trips properly.
