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1. INSTRUMENT DESCRIPTION
Series 4070 level switches have been designed for external lateral installation on pressure tanks in a vertical position.
The models have one or two tripping units, each of which can be fitted with single (SPDT) or double exchange contacts
(DPDT) for low/high level controls and/or alarms.
2. MODEL IDENTIFICATION
MODEL
ANSI 150
PN 40
2
SINGLE
Ø
407
24010 Ponteranica (Bergamo) ITALY - via Serena, 10 - Tel. 0039/035/4530211 - Fax 0039/035/570546 - www.officineorobiche.it-e-mail:info@officineorobiche.it
****************************************************************************************************************************************************************
JULY 14
OFFICINE OROBICHE S.p.A.
INSTRUCTIONS MANUAL FOR LEVEL SWITCHES
ANSI 300
4
6
TRIPPING UNIT
DOUBLE
D
BODY MATERIAL
C.S.
304
316
A
I
J
DISPLACER MATERIAL
AISI 316
2
CONTACT
SPDT
Ø
WATER-PROOF
golden contacts
Under reserve of modifications
SERIES 4070
AISI 316L
2L
DPDT
2
CONTACT TYPE
HG BULB
BASIC
VD
M2
SEALED
with inert gas
M6
M14
CASE
WATER-PROOF
WP
FINNING
Ø
R1 R4 R3
NO STANDARD VERSION
XX
WATER
CURRENT
PROOF
continuos
M3
PNEUMATIC
ALUMINIUM
PNA
Ex-d
EP
1/8
M4
IST//130-I
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Related Manuals for OFFICINE OROBICHE 4070 Series
Summary of Contents for OFFICINE OROBICHE 4070 Series
- Page 1 OFFICINE OROBICHE S.p.A. INSTRUCTIONS MANUAL FOR LEVEL SWITCHES SERIES 4070 1. INSTRUMENT DESCRIPTION Series 4070 level switches have been designed for external lateral installation on pressure tanks in a vertical position. The models have one or two tripping units, each of which can be fitted with single (SPDT) or double exchange contacts (DPDT) for low/high level controls and/or alarms.
-
Page 2: Operating Principle
OFFICINE OROBICHE S.p.A. 3. OPERATING PRINCIPLE The level-switch acts on the basis of displacement. The displacer (1) is partially covered by the liquid and moves due to positive buoyancy: as it rises, he load on the spring (6) connected to a rod is reduced and so pushes a magnetic piston (2) upwards. -
Page 3: Maintenance
OFFICINE OROBICHE S.p.A. 5. COMMISSIONING Make sure that the expected working loads do not exceed the acceptable loads (maximum pressure and temperatures, minimum specific weight) and that the mains voltage matches that indicated on the instrument ratings plate. Check that the instrument trips correctly by changing the level of the liquid several times. - Page 4 OFFICINE OROBICHE S.p.A. 7.5 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);...
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Page 5: Liquid Temperature
OFFICINE OROBICHE S.p.A. 9. DRAWINGS OF CASE WITH DIMENSIONS ELECTRICAL CONNECTIONS ∅ A CODE LIQUID TEMPERATURE ∅ -10÷+135 -11÷-80 1/2” NPT 1/2” NPT +136÷+250 3/4” NPT 3/4” NPT +251÷+400 1/2” UNI 6125 1/2” (GAS) ISO 228/1 3/4” UNI 6125 3/4” (GAS) ISO 228/1 ISO M20 x 1.5... - Page 6 OFFICINE OROBICHE S.p.A. WP CASE (WATER PROOF IP 66) WP CASE (WITH CONNECTOR OUTPUT) 24010 Ponteranica (Bergamo) ITALY - via Serena, 10 - Tel. 0039/035/4530211 - Fax 0039/035/570546 - www.officineorobiche.it-e-mail:info@officineorobiche.it **************************************************************************************************************************************************************** JULY 14 Under reserve of modifications IST//130-I...
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Page 7: 11. Trouble-Shooting
OFFICINE OROBICHE S.p.A. 10. RECOMMENDED SPARE PARTS (*) OFFICINE DISCONNE When ordering spare parts, always indicate the instrument’s serial number. You can find it on the ratings plate on the case (see Fig. 12) and has 5 digits preceded by the letter “F” (e.g.: F45678). -
Page 8: Final Notes
Officine Orobiche may not be held liable for any improper use of its products where these are used for ends other than those indicated in the specifications forming part of the order.