Xylem MN 414 AC Submersible Pump Motors - Manual (Page 8)

2−2 Installation & Operation MN414
WARNING: Do not touch electrical connections before you first ensure that power has been disconnected.
Electrical shock can cause serious or fatal injury. Only qualified personnel should attempt the
installation, operation and maintenance of this equipment.
WARNING: The Adjustable Speed Controller may apply hazardous voltages to the motor leads after power to
the controller has been turned off. Verify that the controller is incapable of delivering hazardous
voltages and that the voltage at the motor leads is zero before proceeding. Failure to observe this
precaution may result in severe bodily injury or death.
Installation When the submersible pump motor leaves the factory it is ready for installation. No adjustment, venting or
oil filling is required.
Considerations
1. The user must select a motor starter and over−current protection suitable for this motor and Its
application. Consult motor starter application data as well as the National Electric Code and/or other
local codes.
2. Maximum submergence of motor is not to exceed 160 ft (49m) in depth and or 100 PSI (690 kpas) at
the external motor seal for Tandem Seal designs. For slurry seal designs the maximum external motor
seal pressure is 15 PSI (103 kpas).
3. Thermal Protectors must be connected. Leads marked P1 and P2 (See Figure 2-2).
4. Moisture Sensing Probes must be connected. Leads marked W1 and W2. (See Figure 2-3).
5. Check your power supply against final nameplate connection voltage.
6. Motor will operate properly with frequency not more than
±5% and voltage not more than ±10% above
or below nameplate rating.
7. Performance within this range will not necessarily be the same as the established performance at
exact rated voltage and frequency.
8. For three phase motors only: To reverse direction of a three phase motor, interchange any two motor
lead connections at the starter.
Installation Procedure
To prevent damage to the motor, do not use force to drive pump on (drive impeller onto motor shaft) or to
remove pump from motor shaft.
1. Turn off and lockout all power and verify the voltage at the motor starter connectors are zero.
2. Connect the motor power leads to the connectors in the motor starter. (See “Grounding”).
Note: The motor lead cable assembly for all Submersible Pump Motors has 3 marked power leads plus
two ground leads, two thermal leads and two moisture sensing probe leads.
3. Three Phase Motors ONLY.
a. Turn off and lockout all power and verify the voltage at the motor starter connectors are zero.
b. Be sure the motor shaft is disconnected from the load and will not cause mechanical rotation of
the motor shaft.
c. Remove all unused shaft keys and loose rotating parts to prevent them from flying off.
d. Momentarily apply power and check the direction of rotation of the motor shaft.
Motors are designed for bi−directional shaft rotation. When voltages in an A−B−C phase
sequence are applied to leads U/T1, V/T2, W/T3 clockwise shaft rotation facing the opposite drive
end will result. If shaft rotation is incorrect, change the direction of rotation as follows:
i. Turn off and lockout all power and verify that the voltage at the motor leads is zero.
ii. Reverse any two of three motor power leads at the motor starter.
iii. Restore power and verify correct rotation.
iv. Turn off and lockout all power and verify that the voltage at the motor leads is zero.
4. Connect the two Thermal Protectors at the motor starter as shown in Figure 2-2.
5. Connect the two Moisture Sensing Probes at the motor starter as shown in Figure 2-3.
6. Follow pump manufacturer’s instructions and mount the pump on the motor shaft.
7. Secure the pump case to the motor flange.
8. Attach drain piping to pump.
9. Use spreader bar and lifting eyes (see Figure 2-1) to lower the motor/pump assembly to the proper
depth. Be sure that motor wires are not damaged (contact with metal objects etc.)
10. Set control parameter values (if applicable) according to motor nameplate values.