FW Murphy MLS Series Installation And Operation Manual Download | Manualshive

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00-02-0730

2019-01-15

Section 15

MLS Series

Liquid Level Switches

Installation and Operations Manual

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Summary of Contents for MLS Series

Page 1: ...00 02 0730 2019 01 15 Section 15 MLSSeries LiquidLevelSwitches Installation and Operations Manual ...

Page 2: ...STALLATION OF THIS FW MURPHY PRODUCT Disconnect all electrical power to the machine Make sure the machine cannot operate during installation Follow all safety warnings of the machine manufacturer Read and follow all installation instructions OBSERVE all pressure and electrical ratings and requirements for the devices and the operating environment BE SURE all pressure HAS BEEN REMOVED from the vess...

Page 3: ...allation Using FW Murphy External Float Chamber 4 Electrical Wiring 5 Testing the MLS at Routine Preventive Maintenance 6 Test Button MLS TF Model Only 6 Testing MLS Switch Manually MLS Models 7 Replacement Parts 9 15000531 MLS Float 9 Accessories 9 15050375 Weld Collar 9 15051098 External Float Chamber 9 15700799 Series 100 External Float Chamber 10 Specifications 11 MLS Series 11 Approximate Shi...

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Page 5: ...at MLS Series rated for 2000 psi 13 8 MPa 138 bar working pressure Electric model only available Improved design provides better dependability with reduced number of moving parts All models screw directly into the scrubber or can be mounted via external float chamber CSA C US Class l Div 1 Grp B C D locations Canadian Registration Number MLS 020 MLS 015 0F12013 2 C all provinces and territories CS...

Page 6: ...Section 15 00 02 0730 2019 01 15 2 MLS Diagram All models of the MLS Series install the same and share dimensions other than Test Button MLS TF Models MLS NOTE Refer to Table 2 for clearances ...

Page 7: ...l of the pressure vessel Verify that the electrical connection is positioned at the bottom NOTE The word TOP is cast into the top of the body Make the electrical wiring connections according to appropriate wiring diagrams for the alarm or shutdown system to be used The electrical connection is inch 14 NPT Ensure all electrical connections are insulated and the cover is fully installed before recon...

Page 8: ...readed connection at the height where you want the level switch to operate The 2 inch NPT threaded connection must be positioned away from the tank wall NOTE If using Float Chamber 15051098 best practices recommend a surface mount installation A tee and bleed valve are typically installed at the bottom of the lower 1 inch pipe riser to allow draining of the float chamber for servicing or replaceme...

Page 9: ...Section 15 00 02 0730 2019 01 15 5 Electrical Wiring Under Back Cover Switch Rating 30VDC VAC 75 mA Back Cover ...

Page 10: ...switch and the wiring from the switch to the control panel 1 If operating at time of testing put the panel in Test Mode to avoid an unintentional shutdown 2 Push the Test Button in while listening for the float to hit the top of the body 3 Release the Test Button while listening for the float to hit the bottom of the body a When you hear the float hitting the body as you press and release the butt...

Page 11: ...s Be careful not to damage or short wires connected to the MLS either at the switch or the annunciator or controller connection point control panel Check terminal connections and wiring before replacing the cover of the MLS for proper operation Test Preparation 1 Check the sight glass to make sure any liquid level is below the MLS If the float is already raised by liquid the test procedure may sug...

Page 12: ...r indicates a change in the state of the switch it is confirmed that the switch is operating normally Figure 1 Switch operates normally Test Float 4 Place the FW Murphy magnetized screwdriver close to the terminals labeled NO and COM see figure 2 a If the meter annunciator or controller does not indicate a change in state of the switch the float is attached to the unit and is in the down position ...

Page 13: ...ries not interchangeable with any other FW Murphy Level Switch Float Accessories 15050375 Weld Collar Operating pressure 2000 psi 13 8 MPa 138 bar Operating temperature 400 F 204 C Not recommended with 1 inch Float Extension 15051098 External Float Chamber Operating pressure 2000 psi 13 8 MPa 138 bar Operating temperature 400 F 204 C ...

Page 14: ...Section 15 00 02 0730 2019 01 15 10 15700799 Series 100 External Float Chamber Operating pressure 2000 psi 13 8 MPa 138 bar Operating temperature 400 F 204 C ...

Page 15: ...ressure Rating 2000 psig 13 8 MPa 138 bar Materials Body ASTM A351 CF8 304 SS Cover ASTM A351 CF8 304 SS Other Wetted Parts 304 or 316 SS Process Temperature 20 to 300 F 29 to 149 C Electrical 30VAC VDC 75mA Form C SPDT Approximate Shipping Weights and Dimensions Weight MLS 020 models 5 5 lbs 2 49 kg MLS 015 models 5 lbs 2 27 kg Dimensions 14 x 5 x 3 5 in 356 x 127 x 89 mm ...

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