Dekker VMAX SERIES Installation, Operation & Maintenance Manual
Also see for VMAX LT SERIES: Installation, operation & maintenance manual
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DEKKER Vacuum Technologies, Inc. / Part No. 9983-0000-S01 Rev. A 26Vacuum ProblemsUnit Operates, but does not achieve desired vacuum level1. Stop system and disconnect power.2. Check if the inlet valve is open and inlet filter is clean.3. Ensure that no lines are open to the atmosphere, causing loss of vacuum.4. Check for leaks in piping systems, using conventional leak detection methods.5. Ensure oil level is correct, pump is primed and filled with oil to the shaft centerline only.6. Check if the oil isolation valve is open.7. Check if the oil solenoid valve is working.8. Check the vacuum set points.9. Check setting of vacuum relief valve and adjust as needed. The valve is typically preset at 27”HgV atsea level.10. Check if the motor rotation is correct. Rotation should be clockwise (facing pump from motorside) and marked by an arrow on the motor or pump housing. If incorrect, switch any two of thethree main power leads on the contactor inside the control panel.Overheating ProblemsUnit overheats or operates above 200°F1. Stop system and disconnect power.2. Check the oil cooler and fan. Clean cooler externally with compressed air. Ensure that 12" of spaceis available in front of the cooler and that the ambient temperature is below 104°F.3. Check if the oil isolation valve is open.4. Check if the oil solenoid valve is working.5. Ensure oil level is correct, pump is primed and filled with oil to the shaft centerline only.6. Check if the temperature control valve is working and that oil is flowing through the cooler.CAUTION: Oil will be HOT.7. Clean oil strainer.8. Check if oil cooler is blocked internally with solids passed through from the process.Unit overheat on start-up in low ambient temperatures1. Stop system and disconnect power2. Oil tends to thicken in temperatures of 45°F and below. Place heat tape and insulation on the fluidseal line from the heat-exchanger to the pump inlet.3. Also insulate the seal-fluid solenoid valve or change oil to synthetic fluid contact authorized dealeror the factory for more information.Noise and Vibration ProblemsThe system is making an abnormal noise or sound1. Stop system and disconnect power.2. Check the coupling and/or element for proper alignment. If worn or damaged, replace.3. Check if the bearings are greased. Rotate the coupling by hand, which should rotate freely. If arubbing noise or binding is observed, contact authorized dealer.4. Ensure oil level is correct, pump is primed and filled with oil to the shaft centerline only.5. Check setting of vacuum relief valve and adjust as needed. The valve is typically preset at 27”HgV atsea level.6. Check the inlet filter and clean if necessary. Pump may hydraulically knock / cavitate if filter isblocked.7. Check if the inlet valve is closed. The pump may hydraulically knock / cavitate if inlet is closed.8. Check vacuum level. Pump may hydraulically knock / cavitate as a result of too deep of a vacuumlevel. |
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