AOpen DE7200 Series Provozní pokyny stáhnout pdf (Strana 44)

OPERATING INSTRUCTIONS

4-6 30 Sep 13

DE-7200VFDCentrifuge

NORMAL STARTUP

Note! If Centrifuge is Heated, Before Starting Centrifuge Follow COLD

CLIMATE STARTUP Instructions Later in This Section to Ensure Proper

Bearing Lubrication.

1. Without electric power applied, open cover and rotate bowl assembly manually to check that

the bowl turns freely and no rubbing is felt.

2. Close cover, tighten all cover bolts to required torque (refer to Section 5), and ensure that all

guards are in place.

3. Verify that all personnel are clear of centrifuge and all guards are in place before applying

electric power to equipment.

4. For explosion-proof cabinet only, turn on compressed air to begin the cabinet purge cycle.

5. Apply electric power to centrifuge. The following screen will appear (on explosion-proof

cabinet, displayed after purge cycle is completed):

6. With Home screen displayed, select Operation to display the following screen:

7. Using up and down arrows, set Bowl and Conveyor Input RPMs at desired speeds:

Bowl - 750RPM minimum; Conveyor - 1RPM minimum.

8. Two options are available for controlling the feed pump. If automatic control by the PLC is

desired, enter Torque %. The pump GPM will then be varied automatically based on bowl and

conveyor torque percentages. Enter Flow GPM for operator setting of pump GPM. Note that

even with Flow selected, the PLC will vary the pump GPM or even shut down pump if

excessive torque is sensed. The Max GPM field always dictates the highest possible flow rate,

even when centrifuge is operating in Torque mode.

9. Select START to turn on centrifuge. Note that Bowl and Conveyor speeds will gradually rise

until settings are reached, and Torque % for bowl and conveyor will rise. If pump drive motor

data has been changed since previous startup, select Autotune to tune motor to VFD.

10. When bowl speed has reached speed setting, select Pump START to start feed pump, and

slowly introduce feed to centrifuge.

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AOpen DE7200 Series Provozní pokyny Strana 44