Electrostatic Oil Cleaner N-Series N10-N25-N40-N100





N-SERIES MODEL: N10/N25/N50/N100




YourKLEENTEKsystemshouldprovidemanyyearsoftrouble-freeservice.Thismanu- alwillhelpyouunderstandtheoperationofyourKLEENTEKunit.Itwillalsohelpyou understandhowtomaintainitinordertoachievetopperformance.Forquickfutureref- erence,fillinthesystemandfilterinformationinthespacesbelow.Shouldyouneed assistance,                                                                                                                   call theUnitedAirSpecialists,Inc.customerservicenumbershownbelow.Toexpediteyour service,havethefollowinginformationavailablewhencontactingUAS.

UASORDER#:  _________________________________________________                            




SYSTEMACCESSORIES: ________________________________________________________










2.   APPLICATIONS........................................................................................1

3.   INSTALLATIONPLANNING......................................................................2

4.   INSTALLATION........................................................................................3

5.   KLEENTEKCONTROLLER.......................................................................3

6.   OPERATION.............................................................................................3

7.   ROUTINEMAINTENANCE.......................................................................4

8.   ALARMS...................................................................................................5

9.   TROUBLESHOOTING...............................................................................5









WiringDiagram,N100  .....................................................................16





We have provided many important safety messages in this manual and on your KLEENTEK® Electrostatic Oil Cleaner.


• Use two or more people to move and install your KLEENTEK® Oil Cleaner.

• The KLEENTEK® must be properly grounded.

• Disconnect power before servicing.

• Replace all access panels before operating.

• Wear protective clothing and safety glasses when handling

collection components or servicing the oil cleaner.

• Electrical connections should only be made by qualified

personnel, and be in accordance with local and national

codes and regulations.

• The KLEENTEK® Oil Cleaner should be serviced by

qualified and trained personnel only.

• The high voltage power supply output is 12,000 volts. Use

caution when servicing.

• Do not use in explosive atmospheres.

• Use to clean approved oils only.

• Do not use to clean oils which are explosive or highly


• Keep flammable materials and vapors, such as gasoline,

away from oil cleaner.

• Operate only in a safe and serviceable condition.

• Check all valve positions before operating to prevent pump

cavitation, excess tank pressure or leakage.


A. Principles of Electrostatic Oil Cleaning

1. Electrostatic oil cleaning system utilizes an electrical field as a means to capture foreign contaminants in a liquid. This electrical field is generated by high voltage electrodes contained within the cleaning chamber of the system. As fluid flows through the field, particulate contaminant including the resinous products of oxidation are subsequently attracted to the electrodes due to several acting laws of physics. The contaminant then becomes lodged on the dielectric media (collectors) located between the electrodes within the cleaning chamber.

B. Unit Construction

1. Unit specifications are listed in Table 1. A list of the replacement parts for the electrostatic oil cleaning unit types is included on page 9 and 10. Should it be necessary to replace any parts on an electrostatic oil cleaning unit, the part description and part number should be used to identify them in the ordering process.

2. Illustrations can be seen in Section 11, beginning on page 8. Important components and features have been labeled for ease of identification.


A. The DOC units can be used to clean any non-conductive fluid such as hydraulic or lubricating oils, provided the oil conforms to the following limitations:

1. The temperature of the oil is below 140°F (60°C).

2. The viscosity of the oil is below 200 cSt (926 S.U.S.).

3. The water content of the oil is below 500 ppm.

B. The DOC unit should N0T be used for the following applications:

            1. Oils with a water content greater than 500 ppm.

2. Oils with a high level of detergent dispersant additives.

3. Oils which are conductive (such as water-based fluids).

C. Environmental Considerations

1. The N-Series Kleentek modules are designed tooperate within an ambient temperature range of 32°F to 120°F (0°C to 49°C). Units with optional heater kit can operate to -10°F (-23°C).

2. The Kleentek units should never be installed in direct sunlight.

3. The Kleentek electrical components are contained in a NEMA 4 enclosure, providing a degree of protection from dirt, rain, snow, splashing water, etc. The Kleentek unit should never be subject to hose directed water.


A. Relative Height of Units (See FIGURE 1)

1. The cleaning chamber of a standard electrostatic oil cleaning unit is designed to withstand pressure up to 25 psi. The pump internal by-pass relief valve is factory set at 25 psi. The oil cleaner should not be installed in a manner as to apply more than 25 psi of back pressure from the reservoir. The unit should not be more than ten feet above or below the reservoir.

B. Plumbing Requirements (See FIGURE 1)

1. Ball valves should be installed in the supply line and return lines from the oil reservoir to isolate the Kleentek unit from the reservoir during servicing or repair.

2. The return line should enter the oil reservoir at a point that is always below the maximum oil level in the reservoir. For optimum circulation of oil the return line should be located on the opposite side of the reservoir from the supply line.

C. Electrical Requirements

1. The DOC units are wired for 115 volts/single phase/60 hertz. A 10' power cord is provided for connection. A Power On/Off Switch is provided for unit operation. The unit should be disconnected from the power source before servicing. The DOC units also have one available ”dry” contact alerting there is an alarm condition, for connection to the machine’s control panel.

D. Equipment Required

1. The DOC comes complete with all necessary parts and components for dedicated operation. Connections for oil supply, return and drain are provided. Ball valves should be installed on the supply and return lines in order to isolate the Kleentek unit from the reservoir during collector changes, servicing or repair. A suction straineris strongly recommended to be used on the supplyside of the pump to protect it from malfunction. Astrainer can be provided as an option with theoptional hose kit.


A. Installing Collectors

1. Prior to installation of collector media for the initial unit start-up or for replacement of fully loaded media, be sure the Power Switch is in the “Off” position and supplied power is disconnected.

2. To install a collector cartridge in the electrostatic oil cleaning unit, close the isolation valves in the supply and return lines. If the Kleentek oil cleaner has pumped oil see “Draining the Cleaning Chamber” in section 6D.

3. To install a collector cartridge, first unscrew (counterclockwise) clamp and remove chamber lid. Once the lid is off, loosen and remove the wing nut and slide the triangular insulator plate off of the center post. The existing filter should slide up and off of the center post.

4. Place a collector cartridge over the center post with the metal tabs facing down and slide it into the cleaning chamber. The metal tabs on the outside of the cartridge should make contact with the cleaning chamber wall and the metal tab in the center of the cartridge should make contact with the center post. One cartridge is needed per change out. (Note: N-100 Requires [2] filters per collector.)

Make sure the triangular insulator plate is in the bottom of the chamber with the ridges facing upward.

5. Check to ensure that the o-ring gasket which provides the seal between the cleaning chamber cover and the cleaning chamber is in the top flange within the cleaning chamber.

6. Replace the cleaning chamber cover and press down lightly until the cover has a snug fit with the cleaning chamber.

7. Replace the cleaning chamber clamp and tighten theclamp until securely fastened.

8. Close air vent valve on cover.


The controller is Nema 4, internally fused (10A SB) and has a built-in overload for the pump motor

A. Controller Pushbuttons and LED's

1. START – press to start filling, cleaning or draining oil; StartLED illuminated when Kleentek is enabled.

2. STOP – press to stop filling, cleaning or draining oil; Stop LED illuminated when all processes are stopped.

3. FWD – press to change pump direction to forward; FWD LED illuminated when pump running in forward direction.

4. REV – press to change pump direction to drain tanks; REV LED illuminated when pump is running in the reverse direction.

5. ALARM RESET – press to clear alarm conditions after correcting cause of alarm; Alarm Reset LED illuminated when alarm conditions are active.

6. UP – press UP repeatedly to scroll up through screens to display current conditions. After 10 seconds the display will return to the default screen

7. DOWN – press DOWN repeatedly to reverse, scrollingdown through screens to display current conditions. After 10 seconds the display will return to the default screen.

6.         OPERATION

A. Power UP

1. Confirm that the oil to be cleaned conforms with limits stated in Section 2.

2. Ensure that the collector media is properly installed as described in Section 4A.

3. Close drain and sample valve on the cleaning chamber.

4. Ensure that supply and return lines are open to machine reservoir.

5. Plug in the 115VAC

6. Turn the power selector switch located on top of the enclosure to the ON position. The power selector switch illuminates signifying operation. If the light does not illuminate consult the troubleshooting chart. The controller will power up, all LEDs will flash ON, the controller configuration and firmware revision are displayed for 10 seconds and then the current condition is displayed.

7. To fill the tanks follow the filling instructions.

B. Filling

1. Open air bleed valve(s) on the top of the tank.

2. Press the START pushbutton. The display reads [TANK FILLING / IN PROGRESS... ], the LED above START illuminates, the LED above FWD illuminates, the pump runs.

3. After several minutes the tank(s) will be full. The pump will stop. There may be a delay. When the float switche(s) detect a full tank then the following may be displayed if all tank(s) are not equally full: [TANK FILLING/15 SECOND PAUSE]. The pump may run again briefly to top off the tank(s).

4. When the tank(s) is full then the pump will stop for 3 minutes. The high voltage is enabled and the display reads HV = 11.9KVDC / PUMP START – 3.0 MIN. The timer will count backwards showing the remaining minutes until the pump will start.

5. Close the air bleed valves at the top of the chamber(s).

6. After the 3 minute delay the pump will restart and the Kleentek will be cleaning oil (see cleaning).

7. If the tank does not fill after a period of time then the Alarm pilot light will flash, the Alarm contact will close, the LED above Alarm Reset will illuminate and the display will read [ TANK NOT FILLING / TIMEOUT ALARM ]. Consult the troubleshooting chart.

C. Cleaning

1. Press the START pushbutton. The LED above START illuminates, The high voltage power is ON,

The display reads [ HV = 11.9KVDC / PUMP START – 3.0 MIN ] Timer will count backwards showing the remaining time until the pump will start. The display will rotate between showing the HV reading for all available tanks.

2. After 3 minute delay, the pump starts, the FWD LED illuminates, the display reads [ HV1 = 11.9KVDC / CLEANING OIL ].

3. The Kleentek unit is now pumping and cleaning oil

4. To stop the Kleentek unit press STOP. The pump stops, the STOP LED illuminates, the display reads [ KLEENTEK OFF / ].

D. Draining

1. Press the STOP pushbutton. The LED above STOP illuminates.

2. Close the isolation valve in the return line.

3. Press START, the START LED illuminates.

4. Press REV immediately. Wait a few seconds then the pump runs in reverse, the REV LED illuminates and the display reads [ TANK DRAINING / IN PROGRESS...].

5. Open the air bleed valves at the top of the chamber lid(s). Remove the brass plug from the clear tubing. This allows all the oil to be pumped from the cleaning chambers without creating a vacuum in the cleaning chamber(s).

6. Wait several minutes until the Kleentek automatically stops. The tanks are empty. The display reads [ POWER DOWN AND / CHANGE COLLECTOR ]. No other functions including scrolling UP and DOWN will be available until the controller is powered down using the POWER selector switch on top of the enclosure.

7. Turn the power selector switch to OFF. Selector switch is not illuminated. The tanks are now empty, the Kleentek is OFF and the collectors may now be replaced.

8. Remove the lid from the tank(s) and then remove filter hold-down and filter.

9. The remaining inch of sediment and oil can be drained via the bottom drain valve, located behind the access panel below the electrical enclosure.

10. It is advisable to clean the cleaning chamber(s) thoroughly before further use. See cleaning procedure in section 7B.


ALWAYS disconnect the unit from the 115 VAC supply power source before servicing.

A. Maintenance Scheduling

The following schedule is for hydraulic oil with moderate contamination. If heavily contaminated oil is to be cleaned, the amount of time between maintenance operations will be less. It should be noted, these schedules are not absolute. The time for the maintenance procedures will vary from one application to the next.

* Dependent upon application, collector life could be extended up to one year. However, collectors must bechanged at least once every year!

Table 2


B. Replacing Collectors and Cleaning the Cleaning Chamber

It will be necessary to change collectors when changing to a different type of oil as well as when they are dirty. At this time, the inside of the cleaning chamber should be cleaned as well. The cleaning procedure is as follows:

1. Drain the cleaning chambers per instructions in 6D.

2. Remove the cleaning chamber covers.

3. Remove the contaminated collector cartridges.

4. Clean the inside of the cleaning chambers with kerosene. Wipe down the inside of cleaning

chambers with lint free cloths until they are free of any contaminants or kerosene.

5. Allow chambers to dry.

6. Install the new collector cartridges per instructions in 4A.

7. Replace the cleaning chamber cover(s) and close the air vent on the chamber cover(s).

8. Turn power switch “ON.”

9. Reset Timer by pressing the Alarm Reset pushbutton 10 times.

8.         ALARMS

Each component that can effect Kleentek operation has possible alarm conditions. While an alarm condition is active, the LED above Alarm Reset will be illuminated, the red pilot light on top of the enclosure will flash and the alarm contact will close. The following are possible alarm displays.


1. Press alarm reset to clear the alarm. The only operation allowed after this alarm is draining the tanks. If cleaning is restarted then the alarm will occur again.

2. Drain the Kleentek using the drain procedure.

3. Replace the collector(s)

4. Reset the hour counter

4.1. Press UP once

4.2. Display TIMER = 4000 HOURS / IN USE = 166 DAYS

4.3. Press Alarm Reset 10 times within 30 seconds


4.5. Press down

4.6. Display TIMER = 0 HOURS / IN USE = 166 DAYS

4.7. The timer is now reset. Refill the Kleentek unit using the fill procedure.


1. HV1 = 2.8KVDC / HV FAILURE ALARM HV2 = 11.8KVDC / HV FAILURE ALARM The voltage for the tank 1 HV power pack has dropped below 3KVDC. If the Kleentek unit only has one tank then the HV for that tank has failed. Correct the condition (consult troubleshooting guide) and press alarm reset to clear the alarm. The same alarm could be displayed for other HV supplies. If the displayed voltage = 0.0KVDC then check that the cable from the tank to the power pack is connected correctly.

2. PUMP MOTOR ALARM / OVERCURRENT – 6.5 A The motor current is too high. Correct the condition causing the overcurrent condition and press alarm reset to clear the alarm.

3. PUMP MOTOR ALARM / UNDERCURRENT – 0.0 A The motor current is nonexistent. Correct the

condition causing the undercurrent condition, probably the motor connector is disconnected and press alarm reset to clear the alarm.

4. TANK NOT FULL / ALARM Scroll UP/DWN to this screen: TANK 1 / NOT FULL The float switch for the tank noted is not sensing the oil level. Press Alarm Reset to clear alarm. Fill the tanks to correct.

5. TANK NOT FILLING / TIMEOUT ALARM The tank float switch has not detected oil after several minutes of filling. Check for the cause as to why the tanks are not filling, correct and press alarm reset to clear the alarm.

6. TANK NOT DRAINING / TIMEOUT ALARM The tank float switch has not opened within 1 minute of draining. Check for the cause, as to why the tanks are not draining, correct and press alarm reset to clear the alarm.

7. LID POSITION ALARM / CORRECT TO CLEAN OIL Scroll UP/DWN to this screen: LID 1 / NOT IN POSITION The proximity sensor for the lid noted is not sensing the lid. Close lid so that the proximity sensor detects the lid. Press Alarm Reset to clear alarm condition.

8. HV ERROR SERVICE / REQUIRED. POWER DOWN HV supply voltage is detected when there should be none. This is a fatal error for the controller. Power down the Kleentek unit and contact UAS.

9. MOTOR ERROR SERVICE / REQUIRED. POWER DOWN Motor current is detected when there should be none. This is a fatal error for the controller. Power down the Kleentek unit and contact UAS.

9.         TROUBLESHOOTING (See Chart on pages 17)

ALWAYS disconnect the unit from the 115 VAC power source before servicing.

A. Loss of High Voltage

When the electrical voltage in the cleaning chamber falls below 3.0 KV, the power to the HV power supply will be interrupted. The alarm contact will also be open. The minimum voltage is 3.0 KV for all units. Should this occur, the unit can be reset by the following:

1. Turn the Power Switch “OFF,” then “ON.”

2. If the high voltage is cut off again within 10 seconds and the alarm signal is received, turn ”OFF” the Power Switch.

3. Test the moisture content in the oil. This can be done in one of two ways. The first way involves obtaining a small sample of oil from the drain valve and examining it under a 50X microscope. If several round spots can be observed, this is confirmation of a moisture content greater than 500 ppm. The second method involves heating a metal teaspoon using a gas flame or lighter and then placing a sample of oil on the heated spoon. If bubbles begin to appear in the oil then the moisture content is greater than 500 ppm. If the moisture content is greater than 500 ppm, the oil must be pre-treated to remove the water from the oil.

B. Alarm After Collector Change

If the alarm signals within 5 hours of operation with the new collectors, check the following:

Test the moisture content in the oil. This can be done in one of two ways. The first way involves obtaining a small sample of oil from the drain valve and examining it under a 50X power microscope. If several round spots can be observed, this is confirmation of a moisture content greater than 500 ppm. The second method involves heating a metal teaspoon using a gas flame or lighter and then placing a sample of oil on the heated spoon. If bubbles begin to appear in the oil then the moisture content is greater than 500 ppm. If the moisture content is greater than 500 ppm, the oil must be pre-treated to remove the water from the oil.

C. Testing - High Voltage

If the DOC unit is not removing contaminants from the oil or is functioning below the designed standard level of operation, this could be due to a lack of high voltage in the cleaning chamber. In this case, the voltage being generated in the cleaning chamber will need to be tested. To test the voltage in the cleaning chamber,proceed with the following instructions:

1. Attain a high voltage probe. It is recommended to use a digital multi-meter and 40KV high voltage probe or equivalent.

2. Drain the DOC unit per instructions in Section 6D.

3. Ensure that flow is stopped and Power Switches are “OFF”.

4. Remove the cleaning chamber cover.

5. Remove the collector cartridge.

6. Disconnect the electrical connector leading to the pump/motor.

7. Replace cleaning chamber cover fastener (band clamp) to provide signal to Proximity Switch.

8. Be sure that no one is touching anything within the cleaning chamber and turn the Power Switch “ON.”

9. The center post is the means by which high voltage is transmitted to the cleaning chamber cartridge. In order to attain a voltage reading from the center post, it will require two people to perform the next step. One person, with an insulated tool, must defeat Float Switch located inside the cleaning chambers Be careful! The high voltage is now ON in the cleaning chamber. The cleaning chamber is grounded and there will be no danger unless the center post is contacted.

10. The ground clip from HV probe must be connected to the grounded tank. Using the high-voltage probe, the second person will contact the center post and attain a voltage output reading.

11. Once the reading is taken, turn ”OFF” all power and restore the DOC unit to its normal operating configuration by replacing collector cartridge, cleaning chamber cover and pump/motor wires. Be sure the metal tabs on the cartridge are facing down and are making contact with the center post and the cleaning chamber wall.

12. The voltage output should be 10-12KV. If a value substantially less than 10KV is attained, contact the KLEENTEK representative.

D. Pump Problems - What to Look For

1.No Oil is Delivered.

a. Suction lift too high for vapor pressures of liquid pumped. While pump will develop as high as 27 inches of vacuum, it is good engineering practice to reduce the vacuum to a minimum.

b. Bad leaks in suction line or port passages can be detected by submerging pressure line from discharge side of pump into a pail of oil, where the air will be seen in the form of bubbles.

c. Pump shaft not rotating.

    Coupling defective - tongue and groove or gear not engaged.


            2. Capacity is too Low.

                        a. Suction lift too high.

b. Air leaks in suction line.

c. Suction line is too small.

Can be detected by installing a vacuum gauge directly at the pump suction. The maximum vacuum at the pump suction should never exceed 15 inches of mercury. It is necessary to keep below 15 inches, not because of the inability of the pump to handle a higher vacuum, but primarily because of the vaporization that is liable to take place at a higher vacuum. Vaporization caused by higher vacuums will generally result in capacity drop-off.

                        d. Pump speed too slow.

e. Strainer too small or obstructed.

f. Suction pipe or port not immersed in the liquid deep enough.

g. Piping improperly installed, permitting air pocket to form in pump.

h. Increased clearances or wear in the pump will sometimes cause the pump to deliver an insufficient supply of liquid.

            3. Pump Works Spasmodically.

a. Suction lift too high.

b. Air or vapor in liquid.

c. Coupling slipping on pump shaft.


4. Pump Wastes Power.

a. Pressure is too high.

b. Liquid more viscous than desired.

c. Suction or discharge lines obstructed.

d. Mechanical defects.


1) End thrust on pump shaft. (Pump is not designed to take end thrust toward the pump cover and extreme care must be taken to prevent thrust in this direction).

2) Driving shaft and pump shaft misaligned.

3) The pump may be binding due to insufficient end clearance.

4) Pump shaft bent.

5) Misalignment within pump due to strains built up by piping or installation.

            5. Pump is Noisy.

a. Machine or part of it is acting as sounding board.

b. Misalignment of couplings. Coupling set up too close to pump.

d. Vibration of pump.

1) Bent Shaft.

2) Worn pump.

e. Air leaks into suction side of pump.

f. Suction lift so high that an air pocket forms within liquid.

            6. Handle With Care.

If it becomes necessary to remove pump from your equipment to return to the manufacturer, plugs should be inserted in the ports to prevent foreign material from getting into the moving parts. Pumps are precision-built and should be given every reasonable care.


A. Disassembly of Seal

The seal assembly of the pump may be changed without disassembly of the rest of the pump.

1. Place the pump in vise, shaft facing up, so that one jaw grips across the two ports. Do not tighten excessively as pump housing may be distorted.

2. Inspect shaft at key-way, flat or drive tang. Any burrs will interfere with removal of housing plug bearing assembly.

3. Remove housing plug with face type spanner wrench.

4. Remove the seal from shaft. The rubber boot will be bonded to the shaft, so it is necessary to push down on the seal to break this bond. Grasp the metal outer shell with any suitable device and pull the seal assembly upwards. The spring and washer should also be removed.

5. The pump assemblies have a snap ring on the shaft to back up the seal assembly. Do not remove this snap ring unless you are completely disassembling the pump. A step on the shaft is used as the seal back up.

6. Remove stationary seal face from housing plug by pressing out from opposite side.

7. If damaged, remove the 0-ring from outside diameter (O.D.) of housing plug.

            B. Disassembly of Pump

1. Seal assembly must be removed before disassembly of pump. Also remove snap ring on shaft.

2. Mark cover and body of the pump for proper reassembly. Remove cap screws, cover, idler and rotor from housing.

            C. Inspection

1. Check pump housing, rotor, idler gear, idler pin and crescent for wear, chipped or broken teeth.

2. Housing bore and rotor O.D. may be checked for wear by positioning rotor in the housing and check for clearance in the bearing. The shaft must turn freely without any detectable side play. Any side play will require replacement of the housing, rotor or both. If both housing and rotor require replacing, it is economically advisable to replace the pump.

            D. Assembly of Pump

            The following must be carefully followed when pump is reassembled:

1. Clean all parts thoroughly using great care to eliminate all dirt.

2. Install rotor in pump body.

3. Apply gasket to cover. Use new gasket if old one is damaged.

4. Place idler gear on pin in cover assembly.

5. Place cover assembly with gear on pump. (Align matching marks for proper location.)

6. Install cover cap screws. Pull down gradually and alternate from a screw on one side to one on the opposite side. Torque to 7-10 ft. lbs.

7. Install snap ring on shaft.

            E. Assembly of Seal

1. Clean all parts thoroughly using great care to eliminate all dirt.

2. Oil shaft with suitable lubricating oil.

3. Oil inside of new rotary seal assembly.

4. Press stationary face into housing plug. Lapped surface must be up. Protect this lapped surface by covering it with a piece of paper when pressing down on face. Use your fingers for this operation.

5. Place new 0-ring on O.D. of housing plug, if required, and lubricate with oil.

6. Lubricate carbon face liberally with lube oil.

7. Reassemble housing plug into position over the pump shaft. Do not nick seal face by hitting pump shaft. Tighten the housing plug with spanner wrench. Rotating seal will automatically be positioned by this operation.

8. If pump is equipped with ball bearing, press bearing onto shaft. Press on bearing inner race with suitable sleeve. Do not hammer into position or press on bearing outer race.

9. Check pump for free rotation by turning shaft with suitable wrench. There will be a definite resistance to turning because of the seal load. The pump must turn freely without binding.


To order parts, contact your local Kleentek Representative or UAS directly:

United Air Specialists, Inc.

4440 Creek Road

Cincinnati, OH 45242

Attn: Kleentek Customer Service Dept.



The following information is required for prompt service:

            1. Unit Model Number (See I.D. Label on side of tank)

2. Unit Serial Number (See I.D. Label on side of tank)

3. Part Number (Refer to Replacement Parts List on page 9)

When returning a defective part under warranty, you must call UAS for a return authorization number (RMA). This number should appear on the package being returned. With this control number, we can ensure prompt service. You can also return defective parts to your local Kleentek Representative.