A.O. Smith Century Pool & Spa Motor Service Manual
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A.O. Smith Century Pool & Spa Motor Service Manual

A.O. Smith Century Pool & Spa Motor Service Manual

A.o. smith pool & spa motor installation, maintenance & service manual
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I n s t a l l a t i o n
—
Ma i nte n a n ce
—
—
Tro u b l e s h o o t i n g
CENTURY
®
POOL & SPA MOTOR
MANUAL

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Summary of Contents for A.O. Smith Century Pool & Spa Motor

  • Page 1 I n s t a l l a t i o n — Ma i nte n a n ce — S e rv i c e — Tro u b l e s h o o t i n g CENTURY ®...
  • Page 2 INTRODUCTION elcome to A.O. Smith’s line of Century Motors. This pocket manual is designed for one purpose — to make it simple for you to install, maintain and troubleshoot Century pool and spa motors. Contrary to what you may be thinking just n o w, your last name doesn’t have to be Edison in order to...
  • Page 3 So save yourself some time and eff o rt and just ask for Century first — at any A.O. Smith distributor or dealer. Century motors are as rugged as any you’ll find, but keep in mind that all motors need service and maintenance at one time or another.

  • Page 4: Table Of Contents

    TABLE OF CONTENTS C e n t u ry Pump Motors ............5 Design Feature s.
  • Page 5 Motor Troubleshooting Motor Fails To Start (makes no sound)....1 9 Motor Fails To Start (hums, tries to start, blows fuse or trips bre a k e r )........2 0 Motor Starts But Shuts Down (overload pro b l e m ).
  • Page 6 CENTURY C e n t u r i o n ® , C-flange Switchless “1081” Motor • Standard Eff i c i e n c y • E-Plus, High Eff i c i e n c y • ⁄ – 5 Hp •...
  • Page 7 ® E-PLUS MOTORS C e n t u r i o n ® , Square Flange Switchless “1081” Motor • Standard Eff i c i e n c y • E-Plus, High Eff i c i e n c y •...

  • Page 8: Design Feature S

    FLEX-48 POOL AND SPA MOTORS Flex-48™ Single-Speed Motors, Thru-Bolt Mount Suitable for jetted tubs and above-ground pools and spas. • ⁄ - 3 Hp • 56-frame conversion base • 3- ⁄ ” shaft height • ⁄ ” threaded shaft • Auto-reset overload p ro t e c t i o n •...
  • Page 9 CENTURION DESIGN FEATURES 2 . All Threaded shafts are 303 stainless steel for superior c o rrosion resistance. Keyed shaft of carbon steel is iron phosphate treated to prevent rust. Stainless steel shafts p rovided on cast iron C-flange, keyed shaft pro d u c t . 3 .

  • Page 10: Nameplate Information

    ’ re servicing, you’ll always be able to find it printed on the motor nameplate. On A.O. Smith motors the nameplate is usually found on the side of the m o t o r, below the capacitor. Shown below is a sample pool motor identification nameplate.
  • Page 11 3 .FR (Frame): The frame identifies the mounting and shaft configuration. It doesn’t indicate the diameter of the shell. A.O. Smith’s line of Centurion and Centurion SE motors have a “56 frame” shell and are 6.5 inches in diameter. Neptune and Flex-48 products are designed in a 48 frame shell and are 5.6 inches in diameter.
  • Page 12 4 .T Y P E : The electrical design of the motor is shown by its type. A.O. Smith uses “CX” to identify its switchless design. Other codes include “CS” for c a p a c i t o r- s t a rt, “S P” for split-phase and “CP” for capacitor start / capacitor run.
  • Page 13 maximum horsepower (Hp x SF). 1 2 .T I M E : Time indicates the duty cycle of the motor. Pool and spa motors are generally rated for continuous duty. 1 3 .AMB (Ambient Te m p e r a t u re ) : The maximum ambient (surrounding) temperature in which the motor is designed to operate.
  • Page 14 A.O. Smith single phase pool and spa motors f e a t u re a thermal overload protector that will shut down the motor if it overheats. As the windings begin to cool down, the overload protector will automatically re - s t a rt the motor.
  • Page 15 A.O. Smith E-Plus (High Efficiency) motor of the same rating when available.

  • Page 16: Grounding

    E L E C T R I C A L C O N N E C T I O N S diagrams shown on the following pages are color- c o d e d for easy reading. The appropriate part number is listed in each illustration, just in case you need to order the complete wiring diagram or connection label sticker for your motor.

  • Page 17: Wi Re Selection Guide 1

    WIRE SELECTION GUIDE THE SIZES SHOWN IN THE FOLLOWING WIRE SELECTION C H A RTS ARE RECOMMENDATIONS ONLY. ALWAYS FOLLOW LOCAL AND NATIONAL ELECTRIC CODES. Motor Hp ⁄ ⁄ ⁄ ⁄ Motor Hp ⁄ ⁄ ⁄ ⁄ 115V Power Line Maximum Distance from Fuse Box to Motor 5 0 ’...

  • Page 18: Tool

    TOOLS ith a few simple tools, you’ll be ready for just about any kind of basic motor service. To make your job easier when installing or servicing a pool or spa motor, make sure that you have these tools in your toolbox before you begin working... •...
  • Page 19 Don’t spray the motor with a water hose. If it’s accidentally flooded, have it inspected at a A.O. Smith authorized service center. L U B R I C A T I O N motors are double sealed, permanently lubricated. If it appears the bearings have failed, simply replace them.
  • Page 20 MOTOR TROUBLESHOOTING W A R N I N G POWER IS OFF. Always turn the power off at the electrical service entrance fuse or breaker box, to p revent possible electric shock. To prevent electrical shock when touching the motor, be sure windings and capacitor are securely grounded to the ground term i n a l which should be used in conformity with local codes.
  • Page 21 6 .Inspect the motor windings for continuity. 7 .If voltage is proper at terminals and the motor is cold, remove the motor and take it to a A.O. Smith Authorized Service Center. MOTOR FAILS TO STA RT (hums, tries to start, blows fuse or trips bre a k e r ) 1 .Check the motor connections after TURNING OFF...

  • Page 22: Noisy Motor 2

    MOTOR TROUBLESHOOTING capacitor using an ohmmeter (see “ Troubleshooting A Capacitor” page 23). 5 .Rotate the motor shaft. If you hear a grinding sound, disassemble the motor and check: the conditions of bearings, a rotor rubbing the stator, c o rrosion, a cracked frame, clogged fan or o b s t ruction(s).

  • Page 23: Motor Hot, Smoking Or Cycling 2

    1 .Mounting, motor coupling and brackets. Tighten loose nuts, bolts or set scre w s . 2 .If a noticeable drag is present, check the bearings and bearing load spring. 3 .Make sure motor fan moves freely and rotor isn’t rubbing stator.
  • Page 24 MOTOR TROUBLESHOOTING 6 .Check the start switch for broken contact welds or a broken spring. 7 .Check the capacitor with an ohmmeter. A bulged capacitor indicates failure on most motors. But with a Centurion, the only way to verify a failed capacitor is with the ohmmeter.

  • Page 25: Best Way To Use A Volt-Ammeter

    As a rule, if it’s necessary to replace one bearing, replace the other as well. Use only A.O. Smith bearings with the proper part number for the motor that you’re working on. A.O. Smith bearings are lubricated and re q u i re no furt h e r...
  • Page 26 MOTOR TROUBLESHOOTING bearings because this could damage the motor and cause a re t u rn service call. 1.TURN THE POWER OFF 2 .Remove the cover from the motor and disconnect the electrical supply leads from the terminal board. Then remove the electrical cable or conduit from the end frame.
  • Page 27 6 .Remove the bearing(s) from the motor shaft, following these steps as necessary : a )Remove shaft collars used to secure bearings. D o n ’t reuse a bearing that is removed from the shaft. 7 .Install the new shaft bearing(s). It is important to press only on the bearing inner race.
  • Page 28 Authorized A.O. Smith Service Center to qualify for warranty coverage. When ordering part s , refer to the part number and serial number on the motor nameplate.
  • Page 29 WIRING DIAGRAMS TABLE OF CONTENTS C e n t u r i o n Switchless (Easy Connect) ....29, 30 ® C e n t u r i o n Switchless (Mfg.
  • Page 30 ® CENTURION /SE/II For motors manufactured in/after Nov., 1991 (Serial #BJ11) Dual Vo l t a g e Type CX- ⁄ to 1 ⁄ 230/115 Vo l t S w i t c h l e s s...
  • Page 31 ® CENTURION /SE/II For motors manufactured in/after Nov., 1991 (Serial #BJ11) Single Vo l t a g e Type CX-1 ⁄ - 5 H p 230 Vo l t S w i t c h l e s s...
  • Page 32 ® CENTURION For motors manufactured prior to Nov. 1991. (Serial #BJ11) Dual Vo l t a g e Type CX– ⁄ to 1 ⁄ 115/230 Vo l t Switchless...
  • Page 33 ® CENTURION For motors manufactured prior to Nov. 1991. (Serial #BJ11) Single Vo l t a g e Type CX–2, 3 & 4 Hp 230 Vo l t Switchless...
  • Page 34 1081 115/230 Vo l t Type CS– ⁄ to 1 ⁄ Wishbone (Old Style)
  • Page 35 1081 115/230 Vo l t Type CP–2 Hp Wishbone (Old Style)
  • Page 36 1081 230 Vo l t Type CP–3 Hp Wishbone (Old Style)
  • Page 37 1081 115/230 Vo l t Type CS– ⁄ to 1 ⁄ Single Arm Switch (Old Style)
  • Page 38 1081 115/230 Vo l t Type CP–2 Hp Single Arm Switch (Old Style)
  • Page 39 ® E-PLUS 230 Vo l t Type CX–2 and 3 Hp Switchless (Old Style)
  • Page 40 2-SPEED 115 Vo l t Type CSM– ⁄ ⁄ Wishbone (Old Style)
  • Page 41 2-SPEED 230 Vo l t Type CSM–1 and 1 ⁄ Wishbone (Old Style)
  • Page 42 2-SPEED 230 Vo l t Type CPM–2 Hp Wishbone (Old Style)
  • Page 43 MICRO-SWITCH MOTOR ( F o rmerly identified as Type CS– ⁄ to 1 Hp G o u l d - G u a rd ) (Old Style) 115/230 Vo l t...
  • Page 44 SWITCHLESS MOTOR ( F o rmerly identified as Type CX–1 ⁄ G o u l d - G u a rd ) Switchless (Old Style) 230 Vo l t...
  • Page 45 SWITCHLESS MOTOR ( F o rmerly identified as Type CX–2 and 3 HP G o u l d - G u a rd ) Switchless (Old Style) 230 Vo l t...
  • Page 46 ® CENTURION Two-Speed Type CXPM– ⁄ /.06 to ⁄ /.10 Hp Single Vo l t a g e Solid-State Switch 115 Vo l t...
  • Page 47 ® CENTURION Two-Speed Type CXPM–1/.12 to 2/.25 Hp Single Vo l t a g e Solid-State Switch 230 Vo l t...
  • Page 48 ® E-PLUS SWITCHLESS Dual Vo l t a g e Type CX– ⁄ to 1 ⁄ 115/230 Vo l t Switchless...
  • Page 49 ® E-PLUS SWITCHLESS Single Vo l t a g e Type CX–2 and 3 Hp 230 Vo l t Switchless...
  • Page 50 ® FLEX 48 FRAME Two Speed Single Vo l t a g e Type SPM– ⁄ /.10 HP 115 Vo l t...
  • Page 51 ® FLEX 48 FRAME Two-Speed Type CXSM 1 ⁄ /.18 HP Single Vo l t a g e Type CXSM 2.0/.25 HP 115 or 230 Vo l t t h rough 4.5/.50 Spl HP...
  • Page 52 ® FLEX 48 Two-Speed Single Vo l t a g e 115 or 230 Vo l t FRAME Type CSM 1.0/.12 Hp 115 Vo l t Type CSM 1.0/.16 Hp 115 Vo l t Type CSM 1.5/.18 Hp 230 Vo l t Type CSM 2.0/.25 Hp 230 Vo l t...
  • Page 53 ® FLEX 48 Single Vo l t a g e Type SP– ⁄ to 1 ⁄ 115 Vo l t...
  • Page 54 ® FLEX 48 Dual Vo l t a g e Type CS–1 ⁄ to 4 Spl Hp 230/115 Vo l t...
  • Page 55 HOW TO IDENTIFY THE DATE OF MANUFACTURE For Century Pool, Spa or Jetted Tub Motors To identify the month and year your Century pool, spa or jetted tub motor was manufactured you need to know the serial code. The serial code on the nameplate is made up of thre e p a rts: serial letter (year), serial number (month), and manufacturing sequence number.
  • Page 56 N E P T U N E ® 2 Compartment Motors Single Vo l t a g e 230 Vo l t Type CP ⁄ 2&3 Hp...
  • Page 57 N E P T U N E ® 2 Compartment Motors Dual Voltage Type CP 230/115 Volt ⁄ ⁄...
  • Page 58 N E P T U N E ® 2 Compartment Motors Dual Vo l t a g e Type CS 230/115 Vo l t ⁄ ⁄...
  • Page 59 A.O. Smith 531 North Fourth Stre e t Tipp City, OH 45371 9 3 7 - 6 6 7 - 6 8 0 0 Fax (937) 667-5873 Bulletin 2944 © A . O . Smith 2000 Litho in USA #2944 11/00...

This manual is also suitable for:

Century centurionCentury neptune cCentury centurion seCentury flex-48

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