Pump Solutions Group Neptune Series 500 MODEL 481 THRU 547 - Manual (Page 17)

14
SECTION IV
MOTOR OPERATING CONDITIONS
16.0 The Standard Series 500 “dia-Pump” is supplied with a 1/3 HP or 1/2 HP/single phase/totally enclosed fan cooled motor
as an integral part of the pump itself.
The normal temperature rise for this motor is 40ºC above ambient temperature and thus, it might appear that the motor is
operating at a higher than normal temperature. This situation is normal and should not cause concern.
As a precaution against motor overheating, it is recommended that the pump be located where adequate ventilation is
available. It is also highly RECOMMENDED THAT A MOTOR STARTER WITH THE PROPER OVERLOAD
PROTECTION BE SUPPLIED AS AN ADDITIONAL SAFETY DEVICE.
The Standard Series 500 “dia-Pump” (1/3HP/1/115V/60C/TEFC) motor is supplied with built-in thermal protection.
Automatic overload is provided on all pumps with standard motor with serial numbers higher than 9600-78D.
Should an overload occur on a standard motor unit which is not protected by a motor starter, or on such a unit where the
starter has failed, the motor will shut down automatically. It will take approximately ½ hour for the automatic thermal
overload switch to reset itself.