In order to maintain temperature in compliance with the Increased Safety “e” label of this motor, the Variable Frequency Drive that supplies the power to the motor must be as designated on the ATEX certificate.
SECTION 2
2 INSTALLATION 2.1 Receiving
The motor is skidded and secured prepared for shipment and can withstand most shocks and rough handling incurred during transit. Before accepting shipment from the transportation company, examine the motor carefully to determine if any damage has occurred during shipment. Unpack the unit and carefully examine the frame and sheet metal for damage.
Inspect for the presence of moisture and make certain no foreign material such as packing, loose fasteners or dirt have fallen into the motor during transportation and unpacking. If transportation damage is noted, determine the extent of the damage, and immediately notify the transportation company claims office and National Oilwell Varco in Sugar Land, Texas.
Be sure to provide complete and accurate details when reporting damage.
2.2 Unpacking and Storage
If the motor is received during cold weather, allow the unit to stabilize to room temperature before removing the protective covering and packing material. This precaution will minimize the condensation of moisture on the cold surfaces and the possibility of early malfunctions resulting from wet windings or other insulating materials.
2.2.1 Unpacking
Unpack the motor with care to avoid damage to the unit. Connect an overhead crane to a minimum of (4) lifting points provided on the motor, lift the unit from the shipping skid and place it in its mounting location.
CAUTION!
Failure to use lifting points and extreme care when moving the motor can result in damage to the motor, other objects, or personal injury.
Avoid manhandling the motor and never apply a lifting force to structural points other than those provided for that purpose.
2.2.2 Storage
If the motor is not to be installed in its operating location as soon as received, it should be stored in a clean, dry area not subject to sudden changes in temperature and humidity.
Storage at normal room temperature is recommended. The motor should be covered to protect it against dust, dirt, moisture and other airborne material while in storage. Consult with National Oilwell Varco for storage recommendations when the motor cannot be stored in a temperature and humidity controlled area or storage for a period of more than six months is anticipated.
Space heaters, when provided in the motor frame, should be energized continuously during storage of motor, but should be de-energized at time of installation and start-up.
Details of space heater power and connections may appear in the Drawing and Data Package.
2.3 Inspection
Before installing the motor it is recommended that the unit be thoroughly inspected for indications of damage or potential malfunctions. Carefully examine the exterior surfaces of the motor for deep scratches, dents, damaged guards, loose or missing bolts, screws and other attaching parts. Remove the screened or louvered covers from the ends of the motor and inspect the rotor and stator and other internal components for loose or damaged windings and lead wires, loosely mounted components, and the presence of moisture or other foreign material.
Remove all shipping materials such as blocks, straps, tapes, rubber packing, paper or other material used to restrict movement of the rotor during shipment. Use low pressure compressed air, 25 PSI maximum, to blow out all packing residue and dust from the interior of the motor. Turn the rotor by hand to make certain it rotates smoothly and without binding.
2.4 Location
The motor can be installed in any clean, dry, well ventilated area which allows a sufficient unobstructed flow of coolant air and provides sufficient accessibility for operation and maintenance of the unit. Avoid locations which would subject the motor to excessive moisture, dust, steam, or fumes from acids, alkalies or other corrosive chemicals. If such exposure cannot be avoided, a strict periodic inspection and maintenance schedule must be established.
2.5 Foundation
The foundation or support for the motor must be rigid, level and of ample size and strength to support the weight of the motor and withstand the motor foundation reaction loads. The foundation must also be adequately designed to maintain coupling alignment between the motor and driven load. It is very important that the foundation is designed in such a manner as to not have any resonant operating frequencies at or near the operating speed, or at a multiple of the operating speed of the unit.
2.6 Alignment
There are three basic types of alignment: parallel, angular, and axial. Misalignment can be parallel, angular, axial, or any combination of the three. An explanation of each type
2.6.1 Parallel
Parallel (radial) misalignment, Figure 4, is the difference in position of the center of rotation of one shaft with respect to the center of rotation of the other shaft.
Figure 4 – Parallel Misalignment (For Reference Only)
2.6.2 Angular
Angular (face) misalignment, Figure 5, is the angle one shaft centerline makes with the other shaft centerline at the coupling connection.
Figure 5 – Angular Misalignment (For Reference Only)