Maintenance; Operation - Xylem CentriPro IM180 Instrucciones De Instalación, Operación Y Mantenimiento

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 con-
tinue 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 pe-
riod 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 be-
tween 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