Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Mobrey Vertical Controls Series B Series X Series D For instructions specific to ATEX approved flameproof models in hazardous area installations, refer to accompanying leaflet IP152/SI Exd www.emersonprocess.
Installation, operation & maintenance instructions Level 2 IP152, Rev AD April 2012
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Mobrey vertical magnetic level controls Principle of Operation Switching is achieved with the Mobrey “three-magnet” system, giving snap-action “latch-on” switching. Vertical movement of the primary magnet A in a glandless pressure tube simultaneously actuates magnets B & C to switch the contacts. The “three-magnet” system enables the primary magnet to pass on and actuate switch mechanisms at other levels.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Electrical characteristics 4 Contact Type : D4, X4, P4, H4 Each switch mechanism has flying leads which are factory wired to ceramic terminal blocks fixed in the switch enclosure. Electrical rating 2x independent SPST AA make on rise : BB make on fall 8 Contact Type : D8, X8, P8, H8 Type Temp wetside °C Low Temp use D4, D8 X4, X8 P4, P8 H4, H8 400 250 400 250 Amp. Amb. Amb. -100°C AC max.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level P4, P8, H4, H8 Switch Mechanisms - Simple Apparatus These Switch Mechanisms in a standard switch housing are classified as “Simple Apparatus” when used in Intrinsically Safe circuits. They comply with the requirements of EN60079-0, General Requirements and EN60079-11, clause 5.7 ‘Simple Apparatus’ and are not considered as a potential source of ignition for an explosive atmosphere.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Series B & X Installation Instructions When installing, using or maintaining external chambers supplied compliant with the Pressure Equipment Directive, refer also to the Safety Information (leaflet No. IP152/SI) supplied with the product for further details. Installation shall be carried out by suitably trained personnel in accordance with applicable codes of practice. 1.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Operating Level Data Models Type No. B 11F, B 12F, B 13F, B 14F, B 17D, X 11F, X 12F, X 13F, X 14F, X 17D C = Highest Operating Liquid Level D (Single Switch) = Reset Level D (Multi-Switch) = Lowest Operating Liquid Level D-C = Wet Switching Differential (Max) Operating Levels : Single switch models Min Operating S.G. 11F : 0.80 Dimension C 50 Dimension D 70 12F : 0.75 50 70 13F : 0.65 50 70 14F : 0.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Series D Installation Instructions Installation shall be carried out by suitably trained personnel in accordance with applicable codes of practice. 1. Remove all sealing tapes, tie strings and protective packings from the control prior to installation. If float rod length needs adjusting to allow a higher operating level, refer to adjustment notes on page 8.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Enclosure type Switching Point Adjustment Switch Mechanism Type D4, P4, X4 Each switch mechanism is mounted on a Max. No. Switches bracket, which is secured on the pressure tube by a locking screw and lock nut. Sw. Adjustment ‘B’ Max. Wet switching differential These can be loosened, allowing the bracket to be adjusted up or down as required. Always Max. No.
Installation, operation & maintenance instructions Level IP152, Rev AD April 2012 Maintenance of the Mobrey vertical level controls Inspection and maintenance shall be carried out by suitably trained personnel in accordance with applicable codes of practice. Series B-Vertical Integral Type This type of control is of the ‘sealed chamber’ type and the float or displacer mechanism cannot be removed. However, the switch mechanisms and switch head should be visually checked periodically. 1.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level 5. Inspect the chamber or stilling tube and remove any deposits. 6. Check float, float rod, and magnet for excessive wear, clean and replace as necessary. 7. Fit replacement joint and reassemble, taking care not to bend the float rod. Use bolt torque values given in tables on page 12. 8. Remove the switch head cover and examine the switch mechanism body for any damage.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level When fitting a spare or replacement switch mechanism IMPORTANT NOTE If a spare switch mechanism is fitted at any time, it is important that the magnet system is left in the correct mode. After installation of a replacement switch mechanism, always check that the B-B contacts are made, assuming the chamber is empty of liquid. If the chamber is full of liquid, then A-A contacts should be checked to ensure they are made.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Bolting Torques Information in this section is to the best of our knowledge correct. Since conditions of use are beyond our control users must satisfy themselves that bolt/torques are suitable for the flange/process/conditions of the applications.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level Bolts should be lubricated with suitable grease. Correct bolt tightening sequence:- IMPORTANT NOTE: Sheet gasket materials This product contains or is fitted with non asbestos gaskets in accordance with BS7531 Grade X, which specifies maximum operating temperatures as follows: Gas/steam/vapor Liquid 250°C 400°C If your application is in excess of these limits, a suitable alternative gasket should be fitted.
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level 15
Installation, operation & maintenance instructions IP152, Rev AD April 2012 Level The Emerson logo is a trade mark and service mark of Emerson Electric Co. Rosemount is a registered trademark of Rosemount Inc. Mobrey is a registered trademark of Rosemount Measurement Ltd. All other marks are the property of their respective owners We reserve the right to modify or improve the designs or specifications of product and services at any time without notice. © 2012 Rosemount Measurement Ltd.
