Multiquip S-500 manual Series SUB. Pump Float Switches, Float Switch Theory, How It Works

Page 12

S-500 SERIES SUB. PUMP — FLOAT SWITCHES

Float Switch Theory

Mercury monitoring is a mercury-switch actuated, liquid level control that has proven to be more economical and longer lasting than other types of liquid-level control systems, easily replacing and improving upon diaphragm switches, air bubble systems and electromechanical switches most often relied upon in the past.

How It Works

There is a tilt-sensitive mercury switch hermetically sealed within each float. As the liquid level (water) rises or falls, the float changes its angle until the mercury switch makes (closed, Figure 4) or breaks (open, Figure 5) the circuit. Maximum pumping range is 120 degrees. See Figure 3 below.

Figure 3. Pumping Range (Float Switch)

Pumping Range

The pumping range of the pump is determined by the float switch tether cord. Use Table 3 as guideline to determine your required pumping range. Pumping ranges are based on non-turbulentconditions. Range may vary due to water temperature and cord shape. Please note as the tether length increases, so does the variance of the pumping range.

Design Features

Constructed of rigid, durable ABS polymer ultrasonically welded. The all-steel mercury switch is held by positioning pins. Interior is filled with cell foam.

■Suitable for most liquid environments.

■Hermetically sealed.

■Thick-walled non-corrosive PVC plastic enclosure.

■Pressure tested to 60 ft. (18.2 meters).

■Mercury switch reliability, proven to 500,000 cycles.

■Standard SJO, 16-gauge, 2 conductor cord (20 ft./6.09 m).

Figure 4. Float Switch (Closed)

Figure 5. Float Switch (Open)

Table 3. Pumping Range

Tether Length

2

in.

4 in.

6 in.

8 in.

10 in.

12 in.

14 in.

16 in.

5.08 cm.

10.16 cm.

15.24 cm.

20.32 cm.

25.4 cm.

30.48 cm.

35.56 cm.

40.64 cm.

 

 

 

 

 

 

 

 

 

 

 

Pumping Range

6

in.

10 in.

14 in.

18 in.

22 in.

27 in.

31 in.

35 in.

15.24 cm.

25.4 cm.

35.56 cm.

45.72 cm.

55.88 cm.

68.58 cm.

78.74 cm.

88.9 cm.

 

 

 

 

 

 

 

 

 

 

 

PAGE 12 — S-500 SERIES SUBMERSIBLE PUMPS — OPERATION & PARTS MANUAL — REV. #0 (10/01/04)

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Contents Submersible Pumps Model S-500 Series Heres HOW to GET Help Series SUB. Pump Table of Contents Series SUB. Pump Parts Ordering Procedures When ordering parts Please supply the following informationSeries SUB. Pump Safety Message Alert Symbols For Your Safety and the Safety of OthersGeneral Safety Series SUB. Pump Rules for Safe OperationMaintenance Safety EmergenciesSeries SUB. Pump Dimensions 500P, S-500UL DimensionsSeries SUB. Pump Specifications SpecificationsControl Box Installation Warnings Series SUB. Pump General InformationIntroduction Series SUB. Pump Components Submersible Pump ComponentsSeries SUB. Pump Float Switches Float Switch TheoryDesign Features How It WorksSeries SUB. Pump Float Switch PIGGY-BACK Float SwitchMounting The Float Switch Series SUB. Pump Float Switch Control BOX Control Box CB3Pump Power Connections Piggy-Back Cord Only Series SUB. Pump OperationHose Connections Attaching Lifting RopeSeries SUB. PUMP- Control BOX Installation Single-Phase Power Installation InputPower Cord Requirements Connecting Dual float Switch SW-1WOP To Control BoxSeries SUB. PUMP- Control BOX Installation Connecting AC Power to the Control BoxConnecting AC Power to the Pump Series SUB. Pump CLEAN-UP Pump Shut-Down/Clean-upSeries SUB. Pump Maintenance Checking Hydraulic OilSeries SUB. Pump -TROUBLESHOOTING Pump TroubleshootingSeries SUB. Pump Performance Curves Pump Performance CurvesSeries SUB. Pump Wiring Diagrams Control BOX Wiring DiagramPage How to read the marks and remarks used in this parts Series SUB. Pump Explanation of Code in RemarksSeries SUB. Pump Suggested Spare Parts 500P/UL Submersible Pump 1 to 3 Units500P/UL/CE Electric Submersible Pump Assy 500P, S-500UL, S-500CE Submersible Pump AssyPart Name QTY Remark 500P/UL/CE Electric Submersible Pump Assy Bolt 500P/UL Electric Motor Assy Part Name 500CE Electric Motor Assy 157-1 020S500CE1571 Effective October 1, 2002 Terms and Conditions of Sale Parts Page Your Local Dealer is

S-500 specifications

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