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10. SPARE PARTS
Only use original spare parts to replace faulty components.
Always specify the exact type of motor and code when requesting our Sales and Assistance Service for technical
information or spare parts.
Only use origional spare parts to replace faulty components. Unsuitable spare parts may cause the product to work
incorrectly and cause hazards for people and property.
11. STORAGE
PEARL submersible motors are a water-lubricated design.
The fill solution consists of a mixture of deionized water and Propylene Glycol (a non-toxic antifreeze).
The solution will prevent damage from freezing in temperatures to -23°F (-5°C);
motors should be stored in areas that do not go below this temperature.
There may be an interchange of fill solution with well water during operation. Care must be taken with motors
removed from wells during freezing conditions to prevent damage.
When the storage temperature does not exceed 104°F (40°C), storage time should be limited to two years. Where
temperatures reach 100° to 130°F, storage time should be limited to one year.
Loss of a few drops of liquid will not damage the motor as an excess amount is provided, and the filter check valve
will allow lost liquid to be replaced by filtered well water upon installation. If there is reason to believe there has
been a considerable amount of leakage, consult the factory for checking procedures.
PEARL recommend that you leave the motor in its original packaging until the day of installation.
When standing the motor upright make sure that it cannot fall over (shaft always upwards).
Do not subject the motor to direct sunlight or other heat sources.
12. FREQUENCY OF STARTS
The average number of starts per day over a period of months or years influences the life of a
submersible pumping system.
Excessive cycling affects the life of control components such as pressure switches, starters, relays and capacitors.
Rapid cycling can also cause motor spline damage, bearing damage, and motor
overheating.
All these conditions can lead to reduced motor life.
The pump size, tank size and other controls should be selected to keep the starts per day as low as practical for
longest life.
4 Inch motors should run a minimum of two minutes in order to dissipate heat built up from starting.
Table2: Maximum # starts per day
HP
0.5 - 1.0
1.5 - 5.0
7.5 - 10
Motor Rating
KW
0.37 - 0.75
1.1 - 3.7
5.5 - 7.5
4MWP
4" Submersible Motors
Maximum # starts per day
SINGLE-PHASE
300
100
50
THREE-PHASE
300
300
200
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