OFFICINE OROBICHE S.p.A.
Contents
1. OFFICINE OROBICHE S p A vs USER S MANUAL for LEVEL SWITCH of the metal eletrical SERIES 80 1 INSTRUMENT DESCRIPTION Series 80 level switches have been designed to be fitted on the external sides of horizontally mounted pressure vessels The models are equipped with a tripping unit which can be provided with single SPDT or double DPDT switching contacts for low and high level control and or alarms 2 MODEL IDENTIFICATION LOW MEDIUM Pressure Pressure 81 HIGH Low Specific Pressure Weight 84 BODY MATERIAL FLOAT MATERIAL 316 2 CONTACT SPDT DPDT 2 2 CONTATCT TYPE HG BULB BASE DC WATER current PROOF VD M2 M3 M4 WATER PROOF ERMET SEALED PNEUMATIC golden cont with inert gas inox brass M6 M14 PN1 PN HOUSING Water Proof EEx d WP EP FINNING m NON STD VERSION 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Under reserve of modifications IST 144 I OO OFFICINE OROBICHE S p A i 3 OPERATING PRINCIPLE The operating principle is based on the hydrostatic principle A B Archimedes s law The float 1 is mounted on a rod resting on the bearing 6 equipped with a balance weight whose fun2. WP housing cover fastening group screw Always mention the instrument serial number in your request for spare parts This number is provided on the instrument rating plate that is fastened to the housing see Pos 9 and is a five digit number preceded by the letter F e g F45678 11 FAULT FINDING Level switches of the 80 series are not normally exposed to faults In cases when the level switch does not operate the switching carry out the test on the float and on the miniature switch as indicated in paragraph 7 MAINTENANCE 12 DISPOSAL When the instruments have come to the end of their service life they need to undergo disposal Always comply with the applicable regulations in force All metal parts after the removal of seals and gaskets special protective coatings requested by the customer and all other plastic parts can be recycled WARNING If the installed miniature switches are of the mercury bulb type code VD they must undergo disposal in compliance with the regulations currently in force for harmful poisonous materials Other types of miniature switches are not subject to these regulations 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Under reserve of modifications IST 144 I Ob OFFICINE OROBICHE S p A 8 8 13 GUARANTEE All the switches parts of the 80 series are guaranteed to b
3. Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Under reserve of modifications IST 144 I OO OFFICINE OROBICHE S p A sis EP HOUSING EEx d IIC T6 HOUSING FOR SINGLE SIDE VIEW OF HOUSING TRIPPING UNIT 2150 i S za SSIS SSS MENTRE area RES f fS INSTRUMENT NAMEPLATE SJ 777777 max 40 Code SPACE REQUIRED TO DISMONT HOUSING COVER X 340 HOUSING WITH SIGLE TRIPPING UNIT 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it ekeokekeekokejeteketotofeototokeotekefojokefofelefojelefeolefeoelofelotofeblejefetofeletejelefeeolefojekefeelefeletefeololeotofebojotetoteleotolelejelefejeleteelefeletefeoteleotolejejelefojeletoelefeetefeolefeetofelotetetotoleotoleotolelejeletojelefejelefejolelejelolelotoleojeleoteleejetelejelele JULY 05 Under reserve of modifications IST 144 I OO OFFICINE OROBICHE S p A 6 8 WP HOUSING WATER PROOF IP66 HOUSING FOR SINGLE TRIPPING UNIT SIDE VIEW OF HOUSING i ay E z a z us A A S E TIT max Code R1 Code RL SPACE REQUIRED TO DISMONT HOUSING COVER X 320 HOUSING WITH SIGLE TRIPPING
4. UNIT WP HOUSING WITH CONNECTOR OUTLET Code C5 C6 C14 SPDT B C NORMALLY CLOSED C A NORMALLY OPEN Code C7 C8 C14 zd DPDT B C E F NORMALLY CLOSED C A F D NORMALLY OPEN 1 2 GAS UNI ISO 7 1 6 GROUND 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it 2A SE A 212 CR IR I EEE EEEE EEDE EE EEEE EEEE EEEE EEE EEEE EE EEEE EEEE EEE EEEE EEEE EEEE EEE EEEE EEEE EEE EEEE EE EEEE EEEE E EEEE EEEE EEE E EEEE EO IO EO E EEEE EEE EE EEE EEEE EEEE I EOC OC E JULY 05 Under reserve of modifications IST 144 I OO OFFICINE OROBICHE S p A ji 10 SUGGESTED SPARE PARTS POS DESCRIPTION E CUSTODIR WP WP HOUSING A Float bar assembly N Body instrument Float Z Coupling N P Gasket Pd Fulcrum Switch assembly N Micro switches v 8 Instrument nameplate 4 o n a A of N CUSTODIA EP EP HOUSING 44 10 External grounding unit AL 7 11 Internal grounding unit 12 Housing gasket 4 pi T a E 12 13 Housing base g 45 14 Housing cover ca a D i pam ans EP housing cover fastening group screw 43 WP housing base fastening group screw
5. ction is to G Rs 9 compensate the weight of the float Close to the balance weight by means of a stem a small piston 2 made from magnetic stainless steel is fitted This piston lodges in a pit 3 made from an a magnetic material The pit 3 bears on top a tripping unit which is schematised in the diagram composed of a magnet 4 and a 1 miniature switch 5 that are connected to one another by d means of levers ze AL In low level A condition the magnet 4 is drawn by the ares E RE piston 2 and this causes the actuation of the miniature HIGH and LOW level switch 5 When the level rises high level B condition the float 1 that follows the level causes the piston 2 to lower The magnet 4 and the miniature switch 5 switch to the quiescent position The difference in height between low level and high level of the fluid is called tripping differential TRIPPING UNIT TRIPPING UNIT b 4 INSTALLATION 4 1 FITTING ON THE SYSTEM Before installing the unit check the vessel connections and those of the instrument for compatibility Burdening the instrument with external loads is strictly forbidden and it is the user s duty to protect it from stress using the system as a rest point is strictly forbidden To avoid the effects of galvanic corrosion no use of mater
6. e free from manufacturing faults over a period of 12 months from the date of shipment In the event of failures implying return of goods within the limit specified above OFFICINE OROBICHE will replace shipment fees not included all damaged parts free provided that the failure does not ensue from incorrect use OFFICINE OROBICHE shall never be held responsible for any incorrect use of their products when these are used for purposes other than those mentioned in the specifications approved at the order stage In these cases no complaints will ever be taken into consideration No damage and or fee whether direct or indirect ensuing from an incorrect installation or use shall ever be debited to OFFICINE OROBICHE The instrument can be used for a maximum life period of 10 years dating from delivery When this period is over there are two alternative options 1 Replace it with a new instrument 2 Have the old instrument overhauled by OFFICINE OROBICHE INSTRUMENT RETURN PROCEDURE The instrument returning to the factory shall bear in attachment the following data 1 Buyer s name 2 Description of the material 3 Detected fault 4 Process data 5 Specification of the fluids that have been used with the instrument The instrument shall be returned perfectly clean and free from dust or deposits Otherwise OFFICINE OROBICHE reserve the right not to carry out the servicing and return the instrument to the sender FINAL REMARKS Each instrume
7. ger than the inspection time NEVER use the instrument at a temperature or a pressure that exceeds the values specified on the rating plate NEVER use the instrument at an electrical rating that exceeds the value specified on the rating plate NEVER perform settings or replace parts without having read the instructions beforehand in case of doubts please contact our customer service department NEVER lubricate any part of the instrument IN cases when the instrument is used at high temperature values always take all the precautionary measures required to safeguard the working staff during the maintenance work stages 7 2 ROUTINE CHECKS ON CONTACTS Discontinue the voltage supply With the lid open perform a sight check to ensure that the tripping unit does not have damaged or aged parts manually actuate the magnet to test whether the miniature switch correctly performs the switchover 7 3 REPLACING THE UNIT AND OR MICRO SWITCH a use a gauge to measure the position of the switch unit b disconnect the wires from the terminal board make a note of the original connections and remove the switch unit by loosening the screw 2 c replace the micro switch 1 ls dm d return the switch unit in the sump 3 in exactly the same Li position as before LJ e adjust the tripping position by manually moving the magnet 4 against the sump 3 tighten grub screw 5 until the Bg micro switch t
8. ials featuring different electrochemical potential is allowed The user shall apply all the technical expedients that are aimed at safeguarding the unit from such occurrence The system shall be equipped with the prescribed safety valve to avoid overpressures that exceed the limit value We suggest you use on off valves that allow for an E easy disassembling of the unit and bleeder valves to DURAN let out any deposits possibly found inside the jn es instrument VENT VALVE If you expect the formation of air or steam bubbles apply air valves to the upper connections bt If for adjustment related reasons two or more instruments need to be installed we suggest you fit p them on a level holding pipe For installation on vessels that are exposed to strong G rhs vibration please contact our customer service department LEVEL SWITCH PIPE j ON OFF VALVE bli 4 2 ELECTRICAL WIRING The instrument is equipped with a terminal block located inside the housing SPDT VERSION For connections NC C NO please refer to the drawing provided on this page Make sure the housing lid is closed before injecting voltage gt Xo The user shall provide for suitable ground connections to protect the working staff DPDT VERSION And any other equipment possibly present C NC C INC The NC C NO contact is referred to an inst
9. nt is supplied fully assembled and equipped with all the needed accessories Some parts are sold separately under special circumstances only Therefore we warn you to carefully inspect the supply and notify us at once if discrepancies are found N B IN CASES WHEN THE INSTRUMENTS ARE MEANT TO BE USED IN AREAS FEATURING POTENTIALLY EXPLOSIVE ATHMOSPHERES THE USER SHALL COMPLY WITH THE ADDITIONAL SAFETY INSTRUCTIONS ATTACHED TO THE STANDARD ONES 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Under reserve of modifications IST 144 I
10. rips and allow for one extra turn before locking the grub screw f check that the micro switch 1 works efficiently using an ohmmeter and a few manual tripping checks g reconnect the wires to the terminal board as per point b Pos A jPos B 7 4 SETTING THE OPERATION POINT The instrument s operation point o is located astride of its horizontal axis and such point cannot be changed 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Under reserve of modifications IST 144 I O OD OFFICINE OROBICHE S p A i 8 DIMENSIONAL DRAWING OF THE BODY A See See See Housing Housing Housing D D D sd mwN t ut 15 m 50 Dimensioning values specified on the order A body pipe B range C connections Model A D 81 141 3 5 155 82 141 3 5 155 83 141 3 5 155 84 168 3 6 165 9 DIMENSIONAL DRAWINGS OF THE HOUSING CODE FLUID TEMPERATURE ELECTRICAL CONNECTIONS A e 10 135 EP WP R 11 80 1 2 NPT 1 2 NPT RI 136 250 3 4 NPT 3 4 NPT R4 251 500 1 2 UNI 6125 1 2 GAS ISO 228 1 3 4 UNI 6125 3 4 GAS ISO 228 1 ISO M20x1 5 1 2 UNI 6125 ISO M20x1 5 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211
11. rument completely filled with fluid wile NO NORMALLY OPEN C COMMON NC NORMALLY CLOSED 24010 Ponteranica Bergamo ITALY via Serena 10 Tel 0039 035 4530211 Fax 0039 035 570546 www officineorobiche it e mail info officineorobiche it JULY 05 Under reserve of modifications IST 144 I OO OFFICINE OROBICHE S p A 3 8 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 specific weight and that the applied electrical rated value complies with the rating plate values Verify that the instrument operates a correct switchover by making the fluid level vary a few times 6 CALIBRATION The instrument is factory set and does not require any adjustment to be made on site In cases when an adjustment or a setting is required please refer to the maintenance paragraph setting the operation point 7 MAINTENANCE We suggest carrying out a periodic routine servicing once every 6 months approximately to ascertain the correct service state of the instrument All maintenance actions need to be carried out when the instrument is switched off depleted of pressure and fluid at room temperature in the event of units working at high or low temperature and disconnected from the contact feeding voltage 7 1 WARNINGS NEVER open the lid without being sure that voltage has been discontinued NEVER leave the case without its lid for lon
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