AOpen DE7200 Series Instrukcje Operacyjne Pobierz pdf (Strona 22)

INSTALLATION

3-2 01 Jan 14

DE-7200VFDCentrifuge

TOP COVER OPENING/CLOSING PROCEDURES

The proper procedures for opening and closing the top cover of the centrifuge must always be

followed. Two operators using both hands are required to open the cover. Derrick recommends

having a hoist available if additional assistance is desired during the opening/closing of the

centrifuge cover. To open and close the cover, proceed as follows:

1. Shut down, lock out, tag out electric power to centrifuge, and allow rotating assembly to coast

to a full stop.

2. Remove bolts securing cover to base.

3. Have two operators using both hands grip the cover handles securely to ensure full control of

the cover throughout the opening and closing process.

4. As the cover is raised, ensure that body limbs of all personnel and any other items remain

clear of the cover gap at all times.

5. Raise the cover to the fully opened position, and insert a 1/2” (12.7mm) hardened steel pin

through one hinge to lock the cover open.

6. After performing the activity that required the cover to be opened, reverse steps 2 through 5 to

close the cover. During the closing procedure, ensure that both operators are capable of

controlling the cover’s descent and that all body limbs and other items remain clear of the gap.

STORAGE

If the centrifuge will be stored for more than 6 months before installation, the control cabinet,

rotating assembly, and motors should be preserved as described in the following paragraphs.

Control Cabinet

For protection against weather and dust, the cabinet should be covered with a tarpaulin (tarp) and

stored indoors under the following environmental conditions:

Temperature - 50°F to 86°F (10°C to 30°C)

Relative Humidity - 20% to 50%

If cabinet will remain in storage for an extended period prior to initial startup, proceed as follows:

1. Power up the cabinet every 6 months and maintain power for 1 to 2 hours.

2. To maintain low humidity inside the cabinet, either place a replaceable desiccant or small

heating source (such as an incandescent light bulb) inside the cabinet.

Rotating Assembly and Motors

For protection against weather and dust, the centrifuge should be covered with a tarp and stored

indoors under the following environmental conditions:

Temperature - 50°F to 86°F (10°C to 30°C)

Relative Humidity - 20% to 50%

The following procedures apply to long-term storage of the centrifuge:

1. Lower the rotating assembly onto the base as described later in this section.

2. Leave main drive V-belts un-tensioned.

3. Every 3 months, manually rotate the bowl assembly at least 20 times, while restraining

conveyor motor from rotating; then re-grease main and conveyor bearings.

4. Manually rotate bowl and conveyor motor shafts 5 to 10 revolutions every 3 months of

storage. If stored more than 1 year, re-grease motor bearings before initial startup.

5. If motors are equipped with internal heaters, power should be applied and heaters energized.

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