Page 2 - We’ve included all the information we think you’ll; INTRODUCTION
1 W 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 justn o w, your last name doesn’t have to be Edison in order top rop...
Page 3 - Replacements for every brand. Every now and then; Safety first. Remember, before you begin to work on
2 Replacements for every brand. Every now and then you probably come across a motor that’s beyond re p a i r.When you do, remember that A.O. Smith manufacture sreplacement pool and spa motors for practically everybrand you’ll ever encounter in the field. So save yourselfsome time and eff o rt and ju...
Page 4 - TABLE OF CONTENTS
3 C e n t u ry Pump Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Design Feature s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Nameplate Inform a ...
Page 5 - Motor Troubleshooting
4 Motor Troubleshooting Motor Fails To Start (makes no sound) . . . . . . . . . . . . . . . . . .1 9Motor Fails To Start (hums, tries to start, blows fuse or trips bre a k e r ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 0Motor Starts But Shuts Down (overload pro b l e m...
Page 6 - mounting brackets; CENTURY
5 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• 1 ⁄ 2 – 5 Hp • No Switch, No Govern o r• Single phase or three phase• Suitable for operation at 50 Hz, 1.0 service factor • Aluminum or cast iron NEMA “C” mounting brackets• True NE...
Page 7 - C e n t u r i o n; t h readed shaft; N e p t u n e; MOTORS
6 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• 1 ⁄ 2 – 5 Hp • No Switch, No Govern o r• 303 stainless steel t h readed shaft • Suitable for operation at 50 Hz, 1.0 service factor • Single or three phase• True NEMA 56-frame•...
Page 8 - CENTURION
7 Flex-48™ Single-Speed Motors, Thru-Bolt Mount Suitable for jetted tubs and above-ground pools and spas. • 1 ⁄ 2 - 3 Hp • 56-frame conversion base• 3- 1 ⁄ 2 ” shaft height • 3 ⁄ 8 ” threaded shaft • Auto-reset overload p ro t e c t i o n • 1.0 service factor Flex-48™ Two-Speed Low Amp Start & R...
Page 10 - NAMEPLATE INFORMATION
W hen you need information about the motory o u ’ re servicing, you’ll always be able to find itprinted on the motor nameplate. On A.O. Smith motors the nameplate is usually found on the side of them o t o r, below the capacitor. Shown below is a samplepool motor identification nameplate. As you rea...
Page 11 - . PA RT: This identifies the motor’s specific design
1 .C AT NO (Catalog Number): This number indicates that the motor is a stock rating, readily available f rom standard inventory as a replacement pool m o t o r. 2 . PA RT: This identifies the motor’s specific design by part number. 3 . FR (Frame): The frame identifies the mounting and shaft configur...
Page 12 - .T Y P E : The electrical design of the motor is shown; ment for power. One horsepower equals 746 watts.; 0 .V O LT S : Voltage is the re q u i red electrical potential
identify motors not specified by NEMA mounting and shaft standards. 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 sta...
Page 14 - H E A T; INSTALLATION
The number one enemy of a motor isheat. Overheating always re s u l t s whenever there is a lack of clean, continually-circ u l a t i n gair for a motor. Heat can damage a motor’s windings,insulation, bearing lubricant and run capacitor. In short ,heat can quickly decrease the service life of a moto...
Page 15 - M O I S T U R E
C e n t u ry and Neptune motors have superior resistance to moisture, but you should avoid placing the motor where it can be splashed. Avoid installing themotor in low spots where it could collect water and beflooded. In fact, it’s probably a good idea to elevate themotor at least two inches off the...
Page 16 - Hp motor at 115 volts over a distance of 150 feet,; G R O U N D I N G; E L E C T R I C A L
The task of wiringyour motor is fairlysimple. The wiring diagrams shown on the following pages are color- c o d e dfor easy reading. The appropriate part number is listedin each illustration, just in case you need to order the complete wiring diagram or connection label sticker for your motor. Make ...
Page 17 - Motor Hp; Motor Hp; WIRE SELECTION GUIDE
1 6 115V Power Line Maximum Distance from Fuse Box to Motor Motor Hp 5 0 ’ 1 0 0 ’ 1 5 0 ’ 2 0 0 ’ 1 ⁄ 3 1 4 1 4 1 2 1 2 1 ⁄ 2 1 4 1 2 1 0 1 0 3 ⁄ 4 1 2 1 2 1 0 8 1 1 2 1 0 8 8 1 - 1 ⁄ 2 1 0 1 0 8 6 2 1 0 8 6 6 3 — — — — 230V Power Line Maximum Distance from Fuse Box to Motor Motor Hp 5 0 ’ 1 0 0 ’ ...
Page 18 - MAINTENANCE
1 7 W ith a few simple tools, you’ll be ready for justabout any kind of basic motor service. To makeyour job easier when installing or servicing a pool or spa motor, make sure that you have these toolsin your toolbox before you begin working... • S t a n d a rd scre w d r i v e r • Wide blade scre w...
Page 19 - the POWER IS OFF first.; C O O L I N G
1 8 An operating motor is usuallytoo hot to touch by hand. It should be located away from direct sunlight and otherheat sources, such as laundry appliances and waterheaters. Provide for ample air circulation around them o t o r. Clean the air inlets as re q u i red, making sure that the POWER IS OFF...
Page 20 - check for a blown fuse or tripped circuit bre a k e r.; . Be sure the motor is connected correctly (as shown; W A R N I N G; MOTOR TROUBLESHOOTING
1 9 B e f o re you even touch them o t o r, MAKE SURE THE 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 electricalshock when touching the motor, be sure windings andcapacitor are securely grounded to th...
Page 21 - . Check for overloading from other appliances on; the same circuit as the motor.; . Check the motor connections after TURNING OFF
2 0 voltage is within the proper range, check for continuity through the pro t e c t o r. 5 . Check for overloading from other appliances on the same circuit as the motor. 6 . Inspect the motor windings for continuity.7 . If voltage is proper at terminals and the motor is cold, remove the motor and ...
Page 22 - Air noise is normal, but an excessively high sound
2 1 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). Repair or ...
Page 27 - the leads have been removed from the term i n a l s .; c ) TURN ON THE POWER. Check the motor for
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. The bearing wi...
Page 28 - For your convenience, a separate Century Stock; SERVICE
I f your pool or spa motor should need attention while still under warr a n t y, we re q u i re that you have it serviced at a 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. For your conv...
Page 31 - S w i t c h l e s s
3 0 For motors manufactured in/after Nov., 1991 (Serial #BJ11)Single Vo l t a g e Type CX-1 1 ⁄ 2 - 5 H p 230 Vo l t S w i t c h l e s s CENTURION ® /SE/II
Page 33 - Switchless
3 2 Single Vo l t a g e230 Vo l t Type CX–2, 3 & 4 Hp Switchless For motors manufactured prior to Nov. 1991. (Serial #BJ11) CENTURION ®
Page 35 - Type CP–2 Hp
3 4 115/230 Vo l t Type CP–2 Hp Wishbone (Old Style) 1081
Page 36 - Type CP–3 Hp
3 5 230 Vo l t Type CP–3 Hp Wishbone (Old Style) 1081
Page 39 - Type CX–2 and 3 Hp
3 8 230 Vo l t Type CX–2 and 3 Hp Switchless (Old Style) E-PLUS ®
Page 42 - Type CPM–2 Hp
4 1 230 Vo l t Type CPM–2 Hp Wishbone (Old Style) 2-SPEED
Page 44 - SWITCHLESS MOTOR
4 3 ( F o rmerly identified as G o u l d - G u a rd )230 Vo l t Type CX–1 1 ⁄ 2 H P Switchless (Old Style) SWITCHLESS MOTOR
Page 45 - Type CX–2 and 3 HP
4 4 ( F o rmerly identified as G o u l d - G u a rd )230 Vo l t Type CX–2 and 3 HP Switchless (Old Style) SWITCHLESS MOTOR
Page 46 - Type CXPM–
4 6 Two-Speed Single Vo l t a g e115 Vo l t Type CXPM– 1 ⁄ 2 /.06 to 3 ⁄ 4 /.10 Hp Solid-State Switch CENTURION ®
Page 48 - SWITCHLESS
4 8 Dual Vo l t a g e115/230 Vo l t Type CX– 3 ⁄ 4 to 1 1 ⁄ 2 H p Switchless E-PLUS ® SWITCHLESS
Page 50 - Type SPM–; FRAME
5 0 Two Speed Single Vo l t a g e115 Vo l t Type SPM– 3 ⁄ 4 /.10 HP FLEX 48 ® FRAME
Page 51 - Type CXSM 1
5 1 Two-Speed Single Vo l t a g e115 or 230 Vo l t Type CXSM 1 1 ⁄ 2 /.18 HP Type CXSM 2.0/.25 HP t h rough 4.5/.50 Spl HP FLEX 48 ® FRAME
Page 55 - For Century Pool, Spa or Jetted Tub Motors; Serial Letter Designation
5 5 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 knowthe serial code. The serial code on the nameplate is made up of thre ep a rts: serial letter (year), serial number (month), andmanufacturing seque...
Page 56 - N E P T U N E
5 6 Single Vo l t a g e 230 Vo l t Type CP 1 1 ⁄ 2 2&3 Hp N E P T U N E ® 2 Compartment Motors
