Pearl 4MWP Series Installation And Operating Instructions Manual
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Pearl 4MWP Series Installation And Operating Instructions Manual

4” submersible motors
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4MWP
4" Submersible Motors
INSTALLATION AND OPERATING INSTRUCTIONS

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  • Page 1 4MWP 4” Submersible Motors INSTALLATION AND OPERATING INSTRUCTIONS...
  • Page 2 4MWP 4” Submersible Motors OVERVIEW Please read this documentation carefully before installation. This manual gives important information concerning the installation, use and maintenance of the motors. The contents of this manual refer to the standard product, as presented in the sales documentation. The installation and operation must comply with the safety regulations in the country in which the product is installed.
  • Page 3 VFD’s also reduce the starting current and “water hammer” during starting. PEARL’s three-phase, encapsulated submersible motors can be used with variable frequency drives (VFD) when used within the guidelines listed here.

  • Page 4: Installation

    The reason is NEMA MG1 standard part 31 does not include a section covering encapsulated winding designs. PEARL’s submersible motors can be used with VFDs without problems or warranty concerns providing all PD WATER SYSTEMS guidelines are followed. PEARL’s single-phase, 2- and 3-wire, encapsulated submersible motors hould only be used with the appropriate variable speed drive.

  • Page 5: Maintenance & Service

    4MWP 4” Submersible Motors 8. ELECTRICAL CONNECTIONS TO THE ELECTRIC PUMP Electrical connections may only be performed by a qualified installer in compliance with current regulations. Make sure that the supply voltage and frequency are compatible with the electrical panel. The relative information is shown on the motor rating plate and in the documents supplied with the panel.

  • Page 6: Spare Parts

    PEARL recommend that you leave the motor in its original packaging until the day of installation. When standing the motor upright make sure that it cannot fall over (shaft always upwards).

  • Page 7: Mounting Position

    4” Submersible Motors 13. MOUNTING POSITION PEARL submersible motors are designed primarily for operation in the vertical, shaft-up position. During acceleration, the pump thrust increases as its output head increases. In cases where the pump head stays below its normal operating range during startup and full speed condition, the pump may create upward thrust. This creates upward thrust on the motor upthrust bearing.
  • Page 8 4” Submersible Motors 14. WATER TEMPERATURE AND FLOW PEARL standard submersible motors are designed to operate up to maximum service factor horsepower in water up to 95°F (35°C). A minimum flow of 0.98 ft/sec for 4” motors is required for proper cooling.

  • Page 9: Control Box Mounting

    4MWP 4” Submersible Motors 16. HOT WATER APPLICATION When the pump-motor operates in water hotter than 95°F (35°C), a flow rate of at least 11.5 ft/sec is required. When selecting the motor to drive a pump in over 95°F (35°C) water, the motor horsepower must be de-rated per the following procedure.
  • Page 10 4MWP 4” Submersible Motors +0,05 15,5 +0,03 18. 4MWP 2 WIRE MOTOR DIMENSIONS +0,05 15,5 +0,03 Table 5: 4MWP 2 WIRE MOTORS 4MWP DIMENSIONS SINGLE PHASE MOTORS Weight TW Axial thrust Type Peso TW Spinta assiale Tipo Peso TW Empuje axial Tipo [hp] [kW]...
  • Page 11 4MWP 4” Submersible Motors 19. 4MWP 3 WIRE MOTOR DIMENSIONS Table 6: 4MWP 3 WIRE MOTORS +0,05 15,5 +0,03 4MWP DIMENSIONS +0,05 15,5 +0,03 SINGLE PHASE MOTORS Weight GG Axial thrust Type [Kg] [lbs] [lbf] [hp] [kW] [mm] [inch] 0.37 10.472 19.4 0.75...
  • Page 12 4MWP 4” Submersible Motors 20. SINGLE PHASE - MOTOR DATA Table 8: 4MWP 2 WIRE MOTOR DATA ELECTRICAL DATA 4MWP 2W SINGLE PHASE MOTORS In (SF) Ø Cos j Is/In Cs/Cn [hp] [kW] [min [µF] [AWG] [ft] 0.65 3450 0.88 3x14 5½...
  • Page 13 4MWP 4” Submersible Motors 21. THREE PHASE - MOTOR DATA Table 11: 4MWP 3 PHASE MOTOR DATA ELECTRICAL DATA 4MWP THREE PHASE MOTORS Cos j In (SF) Ø Is/In Cs/Cn 100% 100% [hp] [kW] [min Load Load [µF] [ft] 3450 0.48 4x14 5½...
  • Page 14 4MWP 4” Submersible Motors 22. SINGLE PHASE MOTOR WINDING RESISTANCES Table 13: 4MWP 1 PHASE 2 WIRE MOTOR WINDING RESISTANCES ELECTRICAL DATA 2 WIRE 4MWP 2W SINGLE PHASE MOTORS WINDING RESISTANCE [hp] [kW] 0.95 0.37 0.75 0.75 1.45 Table 14: 4MWP 1 PHASE 3 WIRE MOTOR WINDING RESISTANCES ELECTRICAL DATA 3 WIRE 4MWP 3W SINGLE PHASE MOTORS MAIN RESISTANCE...
  • Page 15 4MWP 4” Submersible Motors 23. 4MWP THREE PHASE MOTOR WINDING RESISTANCES Table 16: 4MWP 3 PHASE MOTOR WINDING RESISTANCES ELECTRICAL DATA 60 Hz 4MWP THREE PHASE MOTORS WINDING RESISTANCE [hp] [kW] 0.37 25.6 0.75 17.3 0.75 19.7 14.6 0.83 2.35...
  • Page 16 4MWP 4” Submersible Motors 24. MAXIMUM CABLE LENGTHS IN FT Table 18: Single Phase 60Hz Motor rating Copper Wire Size Volts 0000 1460 2160 2630 3140 3770 1020 1610 2510 3880 5880 8720 0.75 1200 1870 2890 4370 6470 7870 9380 1540 2380...
  • Page 17 4MWP 4” Submersible Motors 25. TIGHTENING MOTOR LEAD CONNECTOR SCREWS 4”Motors: 1.1 to 1.4 ft-lb. (1.5 to 1.9 N-m) Screws tightening torques recommended for field assembly are shown. Rubber compression set within the first few hours after assembly may reduce the screws torque. This is a normal condition which does not indicate reduced seal effectiveness.
  • Page 18 4MWP 4” Submersible Motors CBWP CONTROL BOX DIMENSIONS BOX & KNOCKOUT DIMENSION Pos. inch 8.3” 9.8” 5.9” 1” Conduit ” Conduit Volts/Hz Hp Motor kW Motor Run Cap.μF Volts Start Cap.μF Volts 105-126 105-126 105-126 105-126 230/ 60 208-250 208-250 270-324 270-324...
  • Page 19 4MWP 4” Submersible Motors 4CBWP - CONTROL BOX - WIRING DIAGRAMS TO PREVENT HAZARD OF FATAL OR SERIOUS ELECTRIC SHOCK : Connect this control enclosure, all metal plumbing, and the motor frame to the power supply grounding terminal using copper wire complying wich electrical codes. A ground wire at least the size of power wires complies. Smaller wire may comply under some conditions.
  • Page 20 4MWP 4” Submersible Motors CBWP - CONTROL BOX - WIRING DIAGRAMS INSTALLATION AND OPERATION: Mounting – Be sure that the control box is mounted in a vertical position with the top side up. If it is mounted in any other position, the starting relay may not function and the overload may trip. Connections –...
  • Page 21 4MWP 4” Submersible Motors CBWP - CONTROL BOX - WIRING DIAGRAMS TO PREVENT HAZARD OF FATAL OR SERIOUS ELECTRIC SHOCK : Connect this control enclosure, all metal plumbing, and the motor frame to the power supply grounding termi- nal using copper wire complying wich electrical codes. A ground wire at least the size of power wires complies. Smaller wire may comply under some conditions Permanently close all unused wiring operning in this and other equipment.
  • Page 22 4MWP 4” Submersible Motors CBWP - CONTROL BOX - WIRING DIAGRAMS 2 HP 230V 60Hz BASIC 1.5 HP 230V 60Hz BASIC...
  • Page 23 4MWP 4” Submersible Motors CBWP - CONTROL BOX - WIRING DIAGRAMS 3 HP 230V 60Hz DELUXE 3 HP 230V 60Hz 5 HP 230V 60Hz DELUXE 5 HP 230V 60Hz...

  • Page 24: Three Phase Power Unbalance

    4MWP 4” Submersible Motors THREE PHASE POWER UNBALANCE A full three phase supply is recommended for all three phase motors, consisting of three individual transformers or one three phase transformer. So-called “open” delta or wye connections using only two transformers can be used, but are more likely to cause problems, such as poor performance overload tripping or early motor failure due to current unbalance.
  • Page 25 4MWP 4” Submersible Motors THREE PHASE POWER UNBALANCE Phase designation of leads for CCW rotation viewing shaft end. To reverse rotation, interchange any two leads Phase 1 or “A” – Black Motor Lead or T1 Phase 2 or “B” – Yellow Motor Lead or T2 Phase 3 or “C”...
  • Page 26 4MWP 4” Submersible Motors TRANSFORMER SIZES A full three phase supply is recommended for all three phase motors, consisting of three phase individual transformers or one three phase transformer. “Open” delta or wye connections using only two transformers can be used, but are more likely to cause problems from current unbalance.

  • Page 27: Insulation Testing

    4MWP 4” Submersible Motors INSULATION TESTING For the necessary inspections and insulation testing one tool is required: Insulation measuring tester (Megaohmeter) unit 5OOv test, display up to min 200 M Ohm . The correct execution of the junction (hermetic sealing) can be verified testing it under water for at least 15 min and measuring with the Megaohmeter the insulation resistance between the metal recipient, filled with water (or water itself) and each of the phase wires of the cable connected to the motor.

  • Page 28: Water Systems

    4MWP 4” Submersible Motors BOLT TORQUE SETTINGS Table 23: TORQUE SETTING Bolt Size Torque Setting in Nm (ft-lb) Steel 8.8 Stainless Steel 304-316/904 9 (6.638) 7 (5.163) Steel 8.8 Stainless Steel 304-316/904 23 (16.964) 17 (12.539) Steel 8.8 Stainless Steel 304-316/904 45 (33.190) 33 (24.340) Steel 8.8...

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