Complete this information for your records.
Model number and serial number may be found
on the tag mounted to the pump casing.
Pump Model Number
Pump Serial Number
Control Model Number
___________________________________________
Dealer
Dealer phone number
Date of purchase
Date of installation
Current Readings at Startup:
1 Ø 3 Ø L1-2 L2-3 L3-1
Amps: Amps:
Volts: Volts:
______________________________
_______________________________
____________________________
______________________________
__________________________________
________________________________
CentriPro Motors Installation, Operation and Maintenance Manual 1
DANGER
WARNING
CAUTION
Safety
I. Safety
TO AVOID SERIOUS OR FATAL PERSONAL INJURY OR MAJOR PROPERTY DAMAGE, READ
AND FOLLOW ALL SAFETY INSTRUCTIONS IN MANUAL AND ON PUMP.
THIS MANUAL IS INTENDED TO ASSIST IN THE INSTALLATION AND OPERATION OF THIS
UNIT AND MUST BE KEPT WITH THE PUMP.
This is a SAFETY ALERT SYMBOL. When you see this symbol on the pump or in
the manual, look for one of the following signal words and be alert to the potential
for personal injury or property damage.
Warns of hazards that WILL cause serious personal injury, death or major property
damage.
Warns of hazards that CAN cause serious personal injury, death or major property
damage.
Warns of hazards that CAN cause personal injury or property damage.
NOTICE: INDICATES SPECIAL INSTRUCTIONS WHICH ARE VERY IMPORTANT AND
MUST BE FOLLOWED.
THOROUGHLY REVIEW ALL INSTRUCTIONS AND WARNINGS PRIOR TO PERFORMING
ANY WORK ON THIS PUMP.
MAINTAIN ALL SAFETY DECALS.
2 CentriPro Motors Installation, Operation and Maintenance Manual
CAUTION
Handling and Installation
II. Handling and Installation
1. Do not use lead wires to pull, lift or handle the motor. The lead wires should be protected during
storage, handling, moving and installation of the motor.
2. Inspect the motor to determine that it is the correct HP, voltage and size for the job and that there
is no shipping damage.
3. The factory-installed water in the motor is supplied with antifreeze capable of temperatures to -30º
C (-22º F). Do not install, transport or store below these temperatures. If storage is necessary below
these temperatures, drain the water from the motor.
4. After long periods of idleness and on all new installations, check the electrical resistance and megger the motor with lead wires connected. The insulation resistance should have a value of at least 5
megohms at installation and at least 1 megohm after running.
5. Verify motor is filled with clean water before installing. The warranty is void if this is not done.
Also check the tightness of all water filling and drain plugs, mounting bolts and cable connections.
6. Do not hammer the shaft, coupling or slinger since this may damage the thrust bearing. Check the
rotation of the motor by hand to insure that it turns freely.
7. Do not drop the bottom end of the motor in the dirt or mud since this may plug up the diaphragm
opening.
8. If motor is to be installed horizontally, make sure that the lead wires are at the 12 o'clock position
when facing the motor shaft (in horizontal position).
9. Before installation, verify that the motor is the correct required voltage. (If not, refer to step 12
below; CHANGING MOTOR VOLTAGE.)
10. Check that winding coil resistance in each phase is equal to values in Table 2 or 4.
11. Select the proper overload relay or heaters per Table 3 or 6.
12. CHANGING MOTOR VOLTAGE
Motor voltage can be changed from 460V to 230V or from 230V to 460V by changing the voltage
plug as follows:
A. Remove the existing voltage sticker from the voltage plug.
B. Remove the two 5/32" Allen screws and carefully pull the voltage plug up and out using two
screwdrivers as shown in Figure 1.
C. Check to be sure the new plug is not damaged and that it is the correct required voltage.
D. Verify that the plug and the socket in the motor housing are clean and dry.
E. Coat the sealing surface of the voltage plug with Dow Corning 732-3 or comparable silicone
sealant as shown in Figure 2.
F. Insert the new voltage plug as shown in Figure 3. Note that the top of the numerals are toward
the shaft and the bottom is near the outer side of the motor.
G. Secure the new voltage plug into the motor with the two Allen screws. Tighten the screws until
the outer stainless steel portion of the plug contacts the motor housing.
H. Mount the new voltage sticker furnished with the new plug on the motor control panel or
starter.
13. Always verify that the voltage of the plug installed in the motor is the correct
required voltage even if you made no change. Improper installation of the voltage
plug voids all warranties.
CentriPro Motors Installation, Operation and Maintenance Manual 3
Submersible Motor Performance Guidelines For Use On Variable Frequency Drives
III. Submersible Motor Performance
Guidelines For Use On Variable
Frequency Drives
The CentriPro motor has been used extensively with variable frequency drives. As with any modified application, there are considerations to evaluate when using an inverter, or Variable Frequency
Drive (VFD), to operate a submersible motor. To ensure reliable operation, the following guidelines
must be followed when using the 2 pole CentriPro submersible motor with a VFD.
1. Proper, class 10, quick trip, overload protection must be used at all times. As a minimum, Overloads must trip at five times full load current within 10 seconds on any phase.
2. A minimum of 1.5 times full load current should be available to initially start the motor if needed.
3. Minimum operating frequency is 30 hertz
4. Minimum Speed: 0.5 x Synchronous Speed (Example: 3600 RPM x .5 = 1800 RPM)
5. Maximum Speed: 1.00 x Full Load Speed
6. Ramp-up Time: Maximum 1 second to reach 30 Hz, maximum 4.0 seconds to reach current limit
and rated speed
7. Ramp down time: from minimum frequency to power shutoff shall be four (4) seconds.
8. At the minimum speed (see #3), one-half foot per second water velocity, at rated temperature,
must be maintained past the motor. Velocity in excess of 10 feet per second is not recommended.
9. The VFD must maintain a constant volts to Hertz ratio. The controls must be rated the same as
motor nameplate.
10. The output of the VFD must have a filtering or line conditioning device installed to eliminate
voltage waveform phenomenon that might adversely affect motor components and elements.
Power at the motor leads must be clean, free of high voltage transients, harmonics, and within
the voltage range of the motor (1000V peak at more than .2 microsecond rise time).
11. All other requirements and restrictions for the CentriPro submersible motor apply.
These are general guidelines for the operation of the 2 pole CentriPro submersible motor on
AC Inverters incorporating IGBT type switching devices and starting from zero rotation with a
limited, immediate, hydraulic load.
4 CentriPro Motors Installation, Operation and Maintenance Manual
IV. Pre-Installation
1. Maximum Water Temperature:
A) 35º C (95º F): 6" (5 – 40 HP) motors.
B) 25º C (77º F): 6" (50 HP), 8" and 10" motors.
2. PH content of the water between: 6.5–8
3. Maximum Chlorine Content: 500 PPM
Maximum Sulfuric Acid Iron Content: 15 PPM
Maximum Flourine Content: 0.8 PPM
Maximum Electric Conductivity: 118 μMHO/INCH
4. Maximum Sand Content: 50 PPM
5. Proper approved three phase overload protection. Class 10, quick trip overloads are mandatory.
See Table 4, 6 or 7.
6. Proper fusing for motor circuit protection. See Table 5.
7. Proper Line Voltage During Running Conditions:
460V ±10%, i.e. 506 to 414 volts
230V ±10%, i.e. 253 to 207 volts
For a 60 cycle system measured at motor lead wire terminal.
(Voltage drop of cable should be considered by user.)
Current unbalance between legs should not exceed 5% of the average.
8. Proper sizing of motor (current, thrust, voltage, etc.) and a 10 ft. clearance from the bottom of
the well are required.
9. In the case of horizontal installation, the motor is to be rigidly aligned with the pump and firmly
mounted to prevent any load on the shaft and bearings and to avoid any damaging vibrations to
the motor. Also, see #8 in Section II.
10. The motor must always be immersed in water so that a flow velocity of cooling water at a rate of
0.5 feet per second flows past any and all parts of the motor. The motor will not operate in mud
or sand.
11. The power cables shall be sized large enough so that at rated current there will be less than a 5%
voltage drop. Cables must be waterproof submersible type. See Table 8.
12. For 3Ø motors a balanced and properly sized transformer bank shall be provided. Improper electrical supply (for example, phase converter, V-connection transformer, etc.) or connections will
void the warranty.
13. Single phase protection is recommended for protection of the installation. Any failure due to
single phasing of the incoming voltage causing the motor to fail will void the warranty.
14. Lightning arrestors are recommended in the interest of protecting the control panel, as well as the
insulation system of the motor. Any motor failure due to lightning or other Acts of God will void
the warranty.
15. Provide waterproof insulation splices between all lead wires and well cables.
16. In the event that a reduced voltage starter is used to start the motor, the following should be verified:
A. Correct quick trip ambient compensated overloads are incorporated.
B. Proper short circuit protection is utilized.
C. The torque required by the motor and pump package is attainable by this type starter.
D. The lead arrangement of the motor is acceptable with the proposed starter load connections.
Pre-Installation
CentriPro Motors Installation, Operation and Maintenance Manual 5
Pre-Installation (continued), Maintenance and Operation
E. Verify that if any time delay relays are used in switching contactors in and out, that the time
settings are not too long; this could damage the motor.
F. If a manual auto transformer starter is used, don't wait too long to go into the "Run" condition
and don't "tease" the contacts. Double check Table 4 for correct protection.
17. Single Phase Motors (5-15 HP)
Proper connections and correct capacitors and relays are necessary for single phase motor starting
and running.
Connection Diagram: See Figure 1.
See recommended capacitors in Table 3 and recommneded control boxes in Table 1.
18. Do not expose motor leads to air. Leads must be submerged for cooling.
V. Maintenance
There are no bearings that need oil or grease. The motor, being inaccessible, should be monitored
through its electrical connections.
1. Measure and record operating current and voltage.
2. Measure and record the motor insulation resistance. Any resistance of less than 5 megohm
(5,000,000) for a new motor should be evaluated or checked further by a qualified service shop.
3. Lightning arrestors and/or surge capacitors will help prevent damage to the control box, cables and
motor.
4. Single phase protection will help in preventing motor failure due to adverse incoming primary
power.
5. Based on the values obtained in 1 and 2 above and the output flow rates and pressures of the pump,
a complete picture of total performance can be obtained. This can be used to determine any pump
and motor maintenance and overhauling which might be required.
6. If the motor is to be stored, protect the unit from freezing by storing in an area with a temperature
higher than -30º C (-22º F).
VI. Operation
1. After energizing the motor, check the flow and pressure of the pump to make sure that the motor
is rotating in the correct direction. To correct a wrong rotation, switch any two of the three cable
connections. (Three phase motor only.)
2. When starting the pump for the first time, inspect the water for sand. If sand appears, then continue to pump until the water clears up; otherwise, sand will accumulate in the pump stages and
will bind or freeze the moving parts if water is allowed to flow back down the well.
3. During testing or checking rotation (such as "bumping" or "inching") the number of "starts" should
be limited to 3, followed by a full 15 minute cooling-off period before any additional "starts"
are attempted. Depending on the depth of the well and/or method of checking, these rotational
checks or "starts" may actually be full-fledged starts. If this is the case, then a full cooling-off period of 15 minutes is required between this type of start.
4. For automatic (pilot device) operation, the motor should be allowed to cool for 15 minutes between starts.
5. Input voltage, current and insulation resistance values should be recorded throughout the life of
the installation and should be used as a form of preventive maintenance.
Table 2 — Resistance Data
6 CentriPro Motors Installation, Operation and Maintenance Manual
Allen Screws
Pull up straight
Screwdriver
Socket in the
motor housing
Operation (continued)
Dow Corning 732-3 or
comparable silicone sealant
VOLTAGE PLUG
Figure 1
Top
Figure 2
460V
Motor Outer side
Bottom
Table 1 — 6" Single Phase Motors and Required Control Boxes
72.9 F 1.401 0.400 1.774
6M101 10 7.5 73.6 E 1.052 0.316 1.310
6M151 15 11 73.7 D 0.678 0.230 0.850
CentriPro Motors Installation, Operation and Maintenance Manual 7
Resistance - Ohms
Operation (continued)
Connection Diagram For Single Phase Motors
Starter Box
Line 2
Blue
O.L.B.
B
CR
Motor
SYMBOL
Motor : Single Phase Induction Motor
M.C. :Main Coil
A.C.:Auxiliary Coil
B:Motor Lead Black
R:Motor Lead Red
Y:Motor Lead Yellow
G:Motor Ground Lead Green
CR:Running Capacitor
CS: Starting Capacitor
S.R.:Starting Voltage Realy
O.L.B. :Overload Protection Circuit
Line 1
Yellow
CS
S.R.
R
M.C.
A.C.
Y
G
Table 3 — Performance Data of Single Phase Submersible Motors
Breaker
Figure 4
6" MOTOR, 3600 RPM
Output Voltage-Frequency 230V / 60 Hz 230V / 60 Hz 230V / 60 Hz 230V / 60 HzNo Load Current No Load Loss Load Current Efficiency
Load
Power Factor
Characteristics
Slip Full Load Torque Breakdown Torque Locked Rotor Torque Locked Rotor Current Locked Rotor Code Rated Input Current at SF 1.15 Input at SF 1.15