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 ® pool & spa motor manual.
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 just n o w, your last name doesn’t have to be edison in order to p r...
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 s replacement pool and spa motors for practically every brand you’ll ever encounter in the field. So save yourself some time and eff o rt an...
3 c e n t u ry pump motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 design feature s. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 nameplate inform a ...
4 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 ...
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 • tr...
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-fr...
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 & run ...
8 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 . Double-sealed high thrust bearings protect against dirt ...
W hen you need information about the motor y o u ’ 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. As you...
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 configura...
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...
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. This temperature is...
The number one enemy of a motor is heat. Overheating always re s u l t s whenever there is a lack of clean, continually-circ u l a t i n g air 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 ...
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 the motor in low spots where it could collect water and be flooded. In fact, it’s probably a good idea to elevate the motor at least two inches off ...
The task of wiring your motor is fairly simple. The wiring 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. M...
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 ’ ...
1 7 w 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... • s t a n d a rd scre w d r i v e r • wide blade scr...
1 8 an operating motor is usually too hot to touch by hand. It should be located away from direct sunlight and other heat sources, such as laundry appliances and water heaters. Provide for ample air circulation around the m o t o r. Clean the air inlets as re q u i red, making sure that the power is...
1 9 b e f o re you even touch the m 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 electrical shock when touching the motor, be sure windings and capacitor are securely grounded to...
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 t...
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 ...
2 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. Look for loose or binding parts inside the motor or pump. 4 ....
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. I n f o r m ation needed for motor replacement ...
Best way to use a volt-ammeter for voltage check 1 . Attach leads to the volt-ammeter and select the proper voltage scale. 2 .Test voltage at the motor line terminals and verify that it’s within limits while the motor is operating. 3 .Voltage should be within ±10% of the design voltage specified on ...
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. 3 . Remove the motor from the p...
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 wil...
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 con...
2 8 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. Prior 11/91) . . . . . . . 31, 32, 45 10 81, wishbone (old style) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33, 34, 35 10 81, single arm switch (old style...
For motors manufactured in/after nov., 1991 (serial #bj11) dual vo l t a g e type cx- 1 ⁄ 2 to 1 1 ⁄ 2 h p 230/115 vo l t s w i t c h l e s s 2 9 centurion ® /se/ii.
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.
3 1 dual vo l t a g e 115/230 vo l t type cx– 1 ⁄ 2 to 1 1 ⁄ 2 h p switchless for motors manufactured prior to nov. 1991. (serial #bj11) centurion ®.
3 2 single vo l t a g e 230 vo l t type cx–2, 3 & 4 hp switchless for motors manufactured prior to nov. 1991. (serial #bj11) centurion ®.
3 3 115/230 vo l t type cs– 1 ⁄ 2 to 1 1 ⁄ 2 h p wishbone (old style) 1081.
3 4 115/230 vo l t type cp–2 hp wishbone (old style) 1081.
3 5 230 vo l t type cp–3 hp wishbone (old style) 1081.
3 6 115/230 vo l t type cs– 1 ⁄ 2 to 1 1 ⁄ 2 h p single arm switch (old style) 1081.
3 7 115/230 vo l t type cp–2 hp single arm switch (old style) 1081.
3 8 230 vo l t type cx–2 and 3 hp switchless (old style) e-plus ®.
3 9 115 vo l t type csm– 1 ⁄ 2 to 3 ⁄ 4 h p wishbone (old style) 2-speed.
4 0 230 vo l t type csm–1 and 1 1 ⁄ 2 h p wishbone (old style) 2-speed.
4 1 230 vo l t type cpm–2 hp wishbone (old style) 2-speed.
4 2 ( f o rmerly identified as g o u l d - g u a rd ) 115/230 vo l t type cs– 1 ⁄ 2 to 1 hp (old style) micro-switch 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.
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.
4 6 two-speed single vo l t a g e 115 vo l t type cxpm– 1 ⁄ 2 /.06 to 3 ⁄ 4 /.10 hp solid-state switch centurion ®.
4 7 two-speed single vo l t a g e 230 vo l t type cxpm–1/.12 to 2/.25 hp solid-state switch centurion ®.
4 8 dual vo l t a g e 115/230 vo l t type cx– 3 ⁄ 4 to 1 1 ⁄ 2 h p switchless e-plus ® switchless.
4 9 single vo l t a g e 230 vo l t type cx–2 and 3 hp switchless e-plus ® switchless.
5 0 two speed single vo l t a g e 115 vo l t type spm– 3 ⁄ 4 /.10 hp flex 48 ® frame.
5 1 two-speed single vo l t a g e 115 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.
5 2 two-speed single vo l t a g e 115 or 230 vo l t 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 flex 48 ® frame.
5 3 single vo l t a g e 115 vo l t type sp– 1 ⁄ 2 to 1 1 ⁄ 2 h p flex 48 ®.
5 4 dual vo l t a g e 230/115 vo l t type cs–1 1 ⁄ 2 to 4 spl hp flex 48 ®.
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 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 se...
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.
5 7 dual voltage type cp 230/115 volt 1 ⁄ 2 -1 1 ⁄ 2 hp n e p t u n e ® 2 compartment motors.
5 8 dual vo l t a g e type cs 230/115 vo l t 1 ⁄ 3 - 1 1 ⁄ 2 h p n e p t u n e ® 2 compartment motors.
1 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
