PPC-N29TP ULTRASONIC STENCIL

CLEANING SYSTEM

Operator’s Manual

(Rev. 3 September 2008)

PresSure Products Company, Inc.4540 Washington Street, West

Charleston WV 25313-2010(800) 624-9043(304) 744-7871

Fax: (304) 744-6705www.pressureproducts.com

CONTENTS

I. Machine Description……………………………………………………… 4

II. Principles of Operation…………………………………………………… 5II.1 Tank………………………………………………………5II.2 Filters……………………………………………………..5II.3 Ultrasonic Generator…………………………………….. 5II.4 Dryer……………………………………………………...5II.5 Control Panel……………………………………………..6II.6 Part Support Arm…………………………………………6II.7 Safety Disconnect Switch………………………………...7

III. PPC-N29TP Operation…………………………………………………… 7III.1 Recommended Cleaning Fluid…………………………... 7III.2 Filling Procedure………………………………………… 8

Filling with SC200 Concentrate………………………8 Filling with SC200 25% Premix………………………9 Measuring Solution Concentration…………………... 9

III.3 Starting the Machine……………………………………...10 Machine Security Code……………………...……….. 14 Timer Setup Procedure………………………...……...15

III.4 Running an Automatic Cycle……………………………..16III.5 Dryer Cycle……………………………………………… 17III.6 Manual Functions………………………………………... 18

Manual Control of the Arm………….………...……... 18 Manual Control of the Ultrasonics…………...……… 19 Maintenance Mode…….……………...…….………...19 Setting the Time and Date…….………….…………... 19 Shutdown Timer Operation…….………….…………. 20

IV. Maintenance………………………………………………………………. 21 Filters…….………….……………………………….. 21 Filter Change Procedure…….………….…..……...... 21 Pressure Switch Adjustment…….………….…..…….. 23 Draining the Cleaning Fluid…….………….…..…..... 24

V. General Specifications……………………………………………………. 25

VI. Vigon Technical Data Sheets and MSDS……………………..…………. 25

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FIGURES AND ILLUSTRATIONS

1. Schematic Diagram……………………………………………………… 4

2. Operator Control Panel…………………………………………………. 6

3. Safety Disconnect Switch...……………………………………………... 7

4. Operations Screen…………..…………………………………………… 10

5. Fluid Temperature Screen…………………………………………….. . 13

6. Timer Setup Screen.…………………………………………………….. 15

7. Operations Screen..……………………………………………………... 16

8. Manual Functions Screen ……………………………………….…….. 18

9. Front Compartment……………………………………………………. 21

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Introduction

PresSure Products Company’s PPC-N29TP Ultrasonic Stencil Cleaning Machine is designed to clean stencils on 29” x 29” frames and self-tensioning frame stencils for silkscreen printing in the electronics industry where adhesive or solder cream is used. The machine may also be used to clean tools or circuit boards without components. Certain boards with components may be cleaned at the discretion of the customer; however, please note that some components might be damaged by ultrasonic energy.

FIG. 1 : SCHEMATIC DIAGRAM

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I. Machine Description

The PPC-N29TP unit is made up of the following components: Double tank Filters Ultrasonic generator and transducers Control panel with touchpad operator interface Part holder Drying chamber

II. Principles of Operation

II.1 Tank

The stainless steel tank is divided into two compartments (see Fig. 1) by a partition. The height of this partition has been designed to allow the larger compartment (TANK 1) to overflow into the smaller compartment (TANK 2). The fluid is drawn through a fitting in the bottom of the large tank, then through filters, and then discharged through spray lines at the top of the larger tank. The smaller tank is filtered in the same way as the larger one. The flow rate is calculated to ensure complete filtration of the fluid in 1-2 minutes.

II.2 Filters

The PPC-N29TP has two filtration systems. The fluid from the larger tank may contain particles of adhesive or heavy residues (soldering cream alloys). The alloy particles will fall out in a gravity pre-filter, and the remaining residues will be trapped in a five-micron filter cartridge. The smaller tank will contain floating particles that overflow from the larger tank (fluxes of soldering cream). This tank is filtered by a separate five-micron filter. Each of the filtration systems has a magnetically-driven pump with valves for easier filter cartridge changes. Also, on the larger tank, there is an electronically controlled in-line heater for the cleaning solution. This is user adjustable (See Section III.3), but should be set to comply with the recommendations of the cleaning solution manufacturer.

II.3 Ultrasonic Generator

This generator is located in the rear portion of the machine and is inaccessible to the user. It is used to deliver the necessary drive current to the transducers on the back

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of the tank, and has been factory-set for optimum power and efficiency. The generator delivers 750 Watts of cleaning power at 40 kHz frequency.

II.4 Dryer

The drying chamber is located at the rear of the machine. It consists of a powerful cross-flow fan and a resistance heating element. The dryer, which has an adjustable timer, is activated by control buttons on the touch screen panel. The dryer is equipped with a manual-reset high temperature cutoff device. If the blower fails to run, the cutoff will open at 160 F and remove power to the dryer. When the problem is corrected, the device may be reset by depressing the button on it.

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II.5 Control Panel

FIG. 2 : OPERATOR CONTROL PANEL

The operator control panel contains the following features:

ON/OFF (I/O) buttons and power indicator Dual buttons for lowering or manually raising the arm Touch screen operator interface panel [EMERGENCY STOP] button with key lockout

When pushed in, the [EMERGENCY STOP] removes all power to the machine with the exception of the switch itself and the power control relay. This button should be pushed only in an emergency when it is necessary to deenergize the entire machine. When pushed, it removes power from the Programmable Logic Controller (PLC). Removal of PLC power will cause some operational switch settings to be reset to their default states when power is restored. Therefore it should not be used for routine shutdowns. The ON/OFF buttons should be used for this purpose.

II.6 Part Support Arm

The PPC-N29TP is designed to handle 29” x 29” self-tensioning frames. For the cleaning of other stencil dimensions, boards, or other components, custom tools are available from PresSure Products upon request.

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II.7 Safety Disconnect Switch

FIG. 3 : SAFETY DISCONNECT SWITCH

A Safety Disconnect Switch is provided to allow removal of all power within the machine’s cabinet. It has a provision for lockout. This switch should be turned off only when it is necessary to deenergize the entire machine for service. When turned off it removes power from the PLC. Removal of PLC power will cause some operational switch settings to be reset to their default states when power is restored. Therefore it should not be used for routine shutdowns. The ON/OFF buttons should be used for this purpose.

III. PPC-N29TP Operation

III.1 Recommended Cleaning Fluid

Zestron Corporation’s Vigon SC200 stencil cleaning product is recommended for use in the PPC-N29TP. This product has the advantage of entering the microphase above 25 C (77 F). If any non-recommended volatile products or solvents are used, overheating by ultrasonic energy and subsequent damage to the machine may result (this will in turn void the unit’s warranty). SC200 is available as a concentrate or premixed with deionized (DI) water to a 25% solution by volume. An MSDS for SC200 concentrate is provided in this manual.

For new users, Zestron’s Vigon SC210 stencil cleaning product offers excellent cleaning at a lower concentration of 15% for most uses. This saves the user money on chemistry costs. An MSDS for SC210 concentrate is also provided in this manual.

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III.2 Filling Procedure

Remove the front compartment panel by turning the two black fasteners ½ turn counterclockwise. Tilt the panel out from the top, then lift up to remove it. See Figure 9 for valve locations. Including the filters, the total capacity is 55 liters (14.5 gallons). Refer to one of the following sections depending on the type of Vigon SC200 being used.

CAUTION: When filling the machine, chemical protective gloves and eye protection should be worn.

Filling with SC200 ConcentrateRemove the short filter housing by turning to the left (counter-clockwise). Use the supplied filter wrench if necessary. Install a new O-ring. Next, fill the filter housing up to the O-ring groove with DI water. Carefully replace the filter housing, making sure that the O-ring is fully seated in the groove. Thread lower housing into the top housing and tighten securely (hand tight.)

Remove one of the long filter housings by turning to the left (counter-clockwise.) Use the supplied filter wrench if necessary. Install a new O-ring. Place a filter cartridge in the housing. Hold the cartridge down while filling the filter housing up to the O-ring groove with DI water. The filter will tend to float upward. Position the long housing under the top housing. Seat the filter on the boss in the top housing, raise the filter housing, rotate to the right to thread it into the top housing, and tighten securely (hand tight.) The filter will eventually seat itself on the boss in the lower housing. Repeat for the other long filter. Open tank valves V1 and V2 fully. Measure out the proper amount of Vigon SC200 for the desired dilution. For a 25% solution, this is about 14 liters (3.6 gal.). It is helpful to use the supplied siphon pump to dispense the concentrate into the measuring vessel. Using a funnel, pour the concentrate into the rear tank of the machine. With a hose, fill the machine with DI water into the rear tank until it overflows into the front tank and fills it to within three inches of the top.

The filters have bleed valves at each outlet (on the right sides of the long housings) to help remove air when filling. (These are quarter-turn polypropylene ball valves.) Open the left bleed valve fully. When fluid begins to flow from the bleed valve, quickly close it. Open the right bleed valve. When fluid begins to flow from the bleed valve, quickly close it. The machine is now ready to start. See Section III.3 for starting procedures. When starting the machine for the first time, it will take a short time for the pumps to prime. Allow the pumps to run for about 10 minutes to mix the solution thoroughly before use.

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Filling with SC200 25% PremixNOTE: The SC200 Premix tends to separate during storage. It is essential that the container be shaken or stirred with a mixing device each time before dispensing the product to ensure uniformity.

Remove the short filter housing by turning to the left (counter-clockwise.) Use the supplied filter wrench if necessary. Install a new O-ring. Next, fill the filter housing up to the O-ring groove with the stirred SC200 premix. (Use the supplied siphon pump for this task.) Carefully replace the filter housing, making sure that the O-ring is fully seated in the groove. Thread the lower housing into the top housing and tighten securely (hand tight.)

Remove one of the long filter housings by turning to the left (counter-clockwise.) Use the supplied filter wrench if necessary. Install a new O-ring. Place a filter cartridge in the housing. While holding the cartridge down, fill the filter housing up to the O-ring groove with the stirred SC200 premix. The filter will tend to float upward. Position the long housing under the top housing. Seat the filter on the boss in the top housing, raise the filter housing, rotate to the right to thread it into the top housing, and tighten securely (hand tight.) The filter will eventually seat itself on the boss in the lower housing. Repeat for the other long filter. Open the tank valves V1 and V2 fully.

Again using the siphon pump, dispense the stirred SC200 premix into the rear tank until it overflows into the front one and fills it to within three inches of the top.

The filters have bleed valves at each outlet (on the right sides of the long housings) to help remove air when filling. (These are quarter-turn polypropylene ball valves.) Open the left bleed valve fully. When fluid begins to flow from the bleed valve, quickly close it. Open the right bleed valve. When fluid begins to flow from the bleed valve, quickly close it. The machine is now ready to start.

When starting the machine for the first time, it may take a short time for the pumps to prime.

Measuring Solution ConcentrationThe concentration of SC200 in the cleaning fluid may be determined by using a handheld refractometer. The suggested range of the refractometer to use is 0 to 30 Brix. A Refractive Index chart is included in this manual to convert the Brix reading to percent concentration. The solution concentration should be checked periodically to ensure it is at least 25%. When checking the solution, allow the pumps to run for at least ten minutes to ensure that the SC200 is thoroughly mixed with the water. Draw the sample from several inches below the surface and drop it immediately on the refractometer lens to get the reading.

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III.3 Starting the Machine

1. Connect the line cord to a 220 - 240 VAC, 1 Phase power source. Turn on the Safety Disconnect Switch on the left side of the machine. Using the proper key, make certain the [EMERGENCY STOP] button is not locked in. Press the green [On] button (designated on the button by the numeral I).

2. The power indicator (between the green and red buttons) will light.

3. After the touchscreen initializes, the following Operations screen will then appear:

FIG. 4 : OPERATIONS SCREEN

This screen shows the machine’s operational status at a glance and contains all necessary controls to run automatic cleaning cycles.

The [TEMP (F)] indicator reports the measured temperature of the cleaning fluid in degrees Fahrenheit.

The [TEMP STATUS] indicator reflects the conditions of the indicators on the “Fluid Temperature” Screen. If the fluid temperature is either low or high, this indicator will display [LO/HI]. This condition does not prevent operation.

The [CYCLE SELECT] Pushbutton allows the user to select either the [PASTE] Cycle or the [GLUE] Cycle. Each of these is independently programmable for any desired length of time.

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The [FLUID LEVEL] button/indicator reads [OK] when there is sufficient fluid in the overflow (front) tank. Should the level drop too low, the indicator will turn red and flash the word [ADD]. After adding a quantity of fluid at the correct dilution to the front tank, depress the indicator to reset it to [OK].

NOTE: If the machine has just been filled, it might be necessary to depress the [FLUID LEVEL] indicator to clear the [ADD] indication.

The [PUMPS] switch is provided to control the pumps. After initially filling the machine, and clearing the [ADD] indication as described above, the [PUMPS] switch should be turned on (indicated by the numeral [1]) to begin circulation. If the machine is expected to be idle for long periods, the pumps can be turned off to save evaporative loss of fluid, save energy, and reduce wear and tear on the equipment. See also Section III.6 for information on the Shutdown Timer.

The [MAIN FILTER] indicator shows the state of the main filter, the long housing on the left. If it is displays [CHANGE] the filter cartridge should be replaced. This condition does not prevent operation. The state of this indicator is controlled by pressure switch PS1. The indicator will not be visible if the pumps are not running.

The [OVRFLO FILT] (Overflow Filter) indicator shows the state of the overflow tank’s filter, the long housing on the right. If it is displays [CHANGE] the filter cartridge should be replaced. This condition does not prevent operation. The state of this indicator is controlled by pressure switch PS2. The indicator will not be visible if the pumps are not running.

The [AUTO CYCLE] button enables and disables the Automatic mode of the machine. To run automatic cycles, this button must read [ENABLED]. When automatic cycles are not enabled, this button will flash the word [DISABLED].

The [READY] indicator indicates if the cleaner is ready to run automatic cycles. For this indicator to be on, the following conditions must be met:

1. The [PUMPS] switch must be ON [1] (but the pumps might not be running.)

2. The [FLUID LEVEL] indicator must show [OK].3. The [AUTO CYCLE] function must show [ENABLED].

If these conditions are not all present, the indicator will display [NOT READY].

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The [SEC REMAIN] readout displays the number of seconds left to go in the current automatic cleaning cycle. It counts down as the cycle progresses. If the machine is not running a cycle, it displays the programmed length of the cycle as selected on the [CYCLE SELECT] button. This gives a convenient way to make sure the selected cycle is set to the desired length.

The [SHUTDWN TMR] indicator displays [PUMPS STOPPED] if the machine has entered the Shutdown mode. In this mode, the pumps are stopped, waiting for the beginning of a new cleaning cycle. It displays [RUN] if the machine is not in shutdown. See Section III.6 for additional information.

NOTE: The pumps will not run if the fluid level is low (this is to prevent the possibility of running the pumps dry). If the pumps fail to run, check the [FLUID LEVEL] indicator first, and add fluid if necessary. See Section III.4, Step 12 for information on adding fluid. It is also possible that the system is in the Shutdown Mode. Check the [SHUTDWN TMR] indicator. If it says [PUMPS STOPPED] briefly touch both yellow buttons to turn the pumps on again. The [SHUTDWN TMR] indicator will then indicate [RUN].

The DRYER [START] button is used to start the Dryer. It displays [RUNNING] while the dryer is running.

The DRYER [STOP] button stops the dryer. The dryer will run for the full period as set on the [DRYER TIME] button on the “Timer Setup” Screen unless this [STOP] button is pressed to stop it earlier.

The readout below the DRYER [STOP] button displays the number of seconds remaining in the current dryer cycle. It is color coded the same as the [SEC REMAIN] readout so as to indicate its similar function. If the dryer is not running, it displays the programmed length of the dryer cycle in seconds.

The three remaining indicators report the position of the lift arm. There are separate indicators to show when the arm is at either the TOP or bottom (BOT). If the arm is not at either of these points, the MIDWAY indicator will light.

Machine Security Code

The machine’s Security Code is shown on Page 26. That page may be removed from the manual to secure the code if desired.

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4. Three other screens are provided for machine setup. The access to these screens is password protected. To access them, press the [+] key in the lower right corner of the Operations screen. The Security Code screen will appear. Enter the proper passcode and the following “Fluid Temperature” screen will then appear:

FIG. 5 : FLUID TEMPERATURE SCREEN

This screen indicates the temperature of the cleaning fluid, and allows setting of the desired temperatures. It also shows alarm indicators if the temperature is outside of preset limits.

To set the minimum fluid temperature level, take the following steps:

1. Touch the [SET TEMP] button on the screen.2. Enter the desired temperature in whole numbers (e.g., 78). This can be any

number between 70 and 100; press [ENTER].3. The [SET TEMP] button should reappear, displaying the set value.

Status Indicators

HIGH – Temperature is greater than 115o F.OK – Temperature is above the setpoint, but less than 115o F.LOW – Temperature is below the setpoint. The fluid heaters will operate.

HEAT ON – Power applied to electric fluid heaters.

NOTE: The pumps must be running and the [MAIN FILTER] indicator must be indicating [OK] for the heaters to function. The fluid heater is equipped with a

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manual-reset high temperature cutoff device. The cutoff will open at 160 F and remove power to the heater should a problem occur. When the problem is corrected, the device may be reset by depressing the button on it.

4. Depending on the ambient temperature, it may take some time for the cleaning solution to take on a milky-white appearance which indicates that it is in microphase. The Temperature meter and readout will show the actual temperature, and the [OK] status indicator will be on when the set temperature is reached. A [TEMP (F)] readout is also shown on the Operations Screen.

5. The machine provides a “Temperature Abort” function to prevent the fluid from exceeding the recommended temperature as determined by the manufacturer’s specification for the items being cleaned. This parameter is set using the [ABORT TEMP] button. Enter the maximum allowable temperature in the same manner as for the [SET TEMP] button. If the fluid temperature reaches the maximum point, the current cleaning cycle will be aborted, and the ultrasonic generators will be turned off. The cycle will terminate as if it had run the full time. Allow the fluid to cool before starting a new cleaning cycle.

6. Once the desired temperatures have been entered and the fluid is at least 70 F, the machine is ready to operate. The cycle timers are preset at the factory. However, if the user wishes to alter the factory-set lengths, proceed to the “Timer Setup” screen. Go to Step 8 on the next page. If the factory-set values are acceptable, do Step 7 below and then proceed immediately to Section III.4 on Page 16 to begin operation.

7. Press the [-] button in the lower left corner of the screen to return to the Operations Screen. Go immediately on to Section III.4.

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8. Press the [+] button in the lower right corner of the “Temperature” screen twice to move to the “Timer Setup” screen as shown below:

FIG. 6 : TIMER SETUP SCREEN

Timer Setup Procedure1. Touch the appropriate timer button on the screen.2. Enter the desired time, in seconds and tenths (e.g., as one minute = 60 seconds,

you would enter “60.0”) and press [ENTER].3. The timer button should reappear, displaying the value you have set.4. Repeat the process for the two cleaning cycle timers ([Glue] and [Solder

Paste]). Note that each of these cycles is independently programmable for any desired length within the displayed range. The names are primarily for reference.

5. The [Up Transit] timer is set in the same way, but the proper setting may need to be determined by running a few cycles. This timer determines the position where the arm will pause on its way back to the top position.

6. The [Dwell] timer is also set in the same way. This is typically adjusted to allow time for the spray to rinse off the bottom ledge of the stencil frame. If this feature is not needed, simply set this timer to 0.1.

7. The [Dryer] timer is set in the same way, except here the times are typically much longer. For example, for a 15-minute drying cycle, one would enter “900.0” (15 minutes x 60 seconds/minute = 900.0 seconds).

8. A [Shtdwn Time] button allows the user to set the interval between the end of a cleaning cycle and the shutdown of the spray pumps. See Section III.6 for information on this timer.

9. After the timers are set, the machine is ready for operation. Press [+] to return to the Operations Screen and go on to the next Section.

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III.4 Running an Automatic Cycle

1. If the arm is not at the top position, press and hold both yellow buttons simultaneously until the arm raises and the [TOP] indicator illuminates; then release the buttons.

2. Hang the stencil on the holder and center the stencil over the tank. Slide the lock fully down.

3. Press the [CYCLE SELECT] button to select the [GLUE] or [PASTE] cycle, which will determine the cleaning time. The Cycle’s length in seconds will immediately appear on the [SEC REMAIN] readout.

FIG. 7 : OPERATIONS SCREEN

4. Press the [AUTO CYCLE] button so that it turns green and displays the word [ENABLED].

5. After enabling the Auto Cycle, the word [READY] must be displayed on the status indicator below it. If it still says [NOT READY] check the [FLUID LEVEL] indicator to make sure it is displaying [OK]. If it displays [ADD], fluid must be added to the front tank, and the [FLUID LEVEL] button must be pressed to clear the [ADD] indication.

6. If the fluid level is [OK], and the status indicator still displays [NOT READY], turn on the [PUMPS] switch. The status indicator should now display [READY].

7. The machine is ready to run an automatic cycle. The automatic cycle actually starts when the arm reaches the “bottom” position and the yellow buttons are released.

8. Press and hold both yellow buttons simultaneously until the stencil lowers and the [BOT] (bottom) indicator illuminates. At this point, release the yellow buttons. The ultrasonic generator should start (this process may or may not be

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audible, depending on ambient noise level.) NOTE: To reduce splash-out, the spray pumps will be stopped while the stencil is lowering.

9. When the ultrasonic cycle ends, the stencil will automatically rise from the tank and stop part way from the top to help wash the bottom of the stencil where residues may accumulate. The distance the stencil rises is controlled by the [Up Transit] setting on the “Timer Setup” screen.

10. After a time, the stencil will continue its rise to the top. The wait period is controlled by the [Dwell] setting on the “Timer Setup” screen.

11. If it is necessary to end a cleaning cycle before the time is completed, depress the [AUTO CYCLE] button to cause the Automatic Cycle to be [DISABLED]. Depress both yellow buttons simultaneously to raise the item from the tank. Continue holding the yellow buttons until the [TOP] indicator lights, and then release the buttons. If desired, the [AUTO CYCLE] button may then be depressed to return to the system to [ENABLED], allowing additional automatic cleaning cycles.

12. NOTE: If, at any time, the fluid level in the front tank drops below the operating point, the [FLUID LEVEL] indicator at the top of the Operations Screen will flash the word [ADD]. The pumps and ultrasonic generator are locked out under this condition. The user must then add sufficient fluid (at the proper dilution) to bring the level in the front tank to within three inches of the top of the tank. When this is completed, depress the [FLUID LEVEL] indicator to restore operation. The indicator will then indicate [OK] until the next such occurrence. NOTE: If an automatic cleaning cycle is in progress, it will be aborted and the arm will rise. A new automatic cycle may be initiated after the fluid is replenished.

III.5 Dryer Cycle

Open the drying chamber at the rear of the machine. Unlock the stencil and lower it into the dryer. Close the cover and press the DRYER [START] button on the Operations screen. The button will turn from green to yellow and display the word [RUNNING] to indicate that the dryer is on. To turn the dryer off before the cycle is complete, push the DRYER [STOP] button. Any subsequent dry cycle will run for the full time set. The dryer is equipped with a manual-reset high temperature cutoff device. It opens at 160 F.

The Blue readout below the DRYER [STOP] button will show the number of seconds remaining in the drying cycle. When the dryer is not running, it displays the programmed length of the dryer cycle.

During the drying cycle, additional stencils may be cleaned by following steps 1 through 8 while the dryer is running. Drying will be expedited if excess fluid is

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removed from the stencil by using a squeegee or wiper before placing it into the dryer.

NOTE: Vigon SC200 typically does not need to be rinsed; after drying, if any traces remain, they can be simply wiped clean. This is more likely to occur after the fluid has been in use for an extended period.

III.6 Manual Functions

There may be times when it is desirable to operate the machine in a non-standard fashion (i.e., in some manner other than a prescribed automatic cycle)—for example, in order to develop a cleaning process for a different type of item, or to expose the item to additional ultrasonic cleaning time. It might also, at some time, be necessary to reverse the direction of travel for the lift arm. For these reasons, a password protected “Manual Functions” screen is provided, and can be accessed from the Operations screen. Simply press the [+] button to bring up the Password Entry screen. Enter the proper password. This will take you to the “Fluid Temperature” screen. Press the [+] again to move on to the “Manual Functions” Screen as shown below:

FIG. 8 : MANUAL FUNCTIONS SCREEN

Manual Control of the ArmThe upper center portion of the “Manual Functions” screen controls the motion and position of the arm. The status lights indicate when the [TOP] and [BOT] (bottom) positions are reached (intermediate positions are indicated by [MIDWAY]). The [DIR] (direction) switch controls the direction of the motor. For example, if the arm is on the way down, and the operator wishes to retract it, first release the yellow

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pushbuttons. Then access this screen and touch the [DIR] switch, which will change position from [Fwd] to [Rev] or vice versa. Then depress the two yellow pushbuttons again. The arm will then move in the opposite direction. NOTE: Automatic cycles can be run with this switch in either position.

Manual Control of the UltrasonicsThe [ULTRASONICS] button on this screen allows the operator to manually alternate the control of the ultrasonics between [ON] and [AUTO]. The only requirement is that there must be adequate fluid level in the tanks as sensed by the level sensor in the overflow (front) tank. This button is a toggle; that is, press it once to turn the ultrasonics [ON], and press it again to return the ultrasonics to [AUTO].

CAUTION : This button must be in [AUTO] when running Automatic Cleaning Cycles. If it is left in the [ON] state, the automatic cycle cannot control the generator and it will run continuously, potentially causing fluid overheating.

If the fluid temperature reaches 115 F, the [HIGH] temperature indicator will illuminate and the generator operation will cease. It will resume when the temperature falls below 115 F. Therefore the fluid will remain at about 115 F until the ultrasonic generator is returned to [AUTO] and the fluid is allowed to cool.

Do not leave the ultrasonics operating while unattended for extended periods—this can lead to erosion of the item being cleaned, or ultimately the premature erosion of the tank surfaces .

Maintenance ModeThe [MODE] switch on this screen is provided for use primarily in draining the machine. Usually, this switch is left in the [Normal] mode. For an explanation of how to use this switch, see Section IV.

Setting the Time and Date1. Simultaneously depress the upper and lower LEFT corners of the screen. A panel will appear

offering a choice of language. Press the [ENGLISH] button. Another screen will appear with a [Clock] button.

2. Depress the [Clock] button. A screen will appear with a numeric keypad and buttons for Hr, Min, Sec, Mon, Day and Yr. NOTE: The clock is set using 24-hour military-style time, where 1:00 PM is 13:00. It also displays the time in 24-hour format.

3. Only the parameter(s) that need(s) changing have to be entered. For example, in switching between daylight and standard time, you only need to enter the “Hr” parameter.

4. Enter the new value on the keypad and depress the proper pushbutton. If the entered value is out-of-range, a message will be displayed.

5. When all the values are correct, depress the [Exit] key twice to return to the normal display.

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The “Manual Functions” screen also contains the control button for the Shutdown Timer. The shutdown timer allows the user to automatically turn the spray pumps off after a period of time following the end of the cleaning cycle.

Shutdown Timer OperationThe [SHUTDWN TMR] button enables and disables the Shutdown Timer. This button is a toggle function. Push the button to alternate between Enable and Disable. The default state of this button upon power up is Enable.

The length of the interval is controlled by the [SHTDWN TIME] button on the “Timer Setup” Screen.

When the arm has risen completely to the top at the conclusion of a cleaning cycle, and the [SHUTDWN TMR] button is in the Enable position, the machine will wait the amount of time set on the [SHTDWN TIME] button. When this period of time has elapsed, the spray pumps will turn off. On the Operations screen, the [SHUTDWN TMR] indicator will turn red and read [PUMPS STOPPED], indicating that the shutdown is in effect. The filter indicators will be hidden.

To run another cleaning cycle, mount the item in the lift arm and depress the two yellow buttons to lower it into the tank. When the item reaches the bottom and the [BOT] indicator lights, release the yellow buttons. The spray pumps will then start and the Filter indications will reappear on the Operations screen. The [SHUTDWN TMR] indication will turn green and read [RUN].

NOTE: If the user wishes to turn the pumps back on without running a cleaning cycle, touch both yellow buttons briefly and the pumps will restart. The [SHUTDWN TMR] indication will turn green and read [RUN]. The pumps will then run indefinitely.

If it not desired to turn the spray pumps off when a cycle is over, simply push the [SHUTDWN TMR] button so that Disable is selected.

To exit from the “Manual Functions” screen, press the [+] button twice and you will be returned to the Operations screen.

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IV. Maintenance

FiltersFailure to maintain the filtration system properly will result in a gradual loss of circulation. Therefore, it is recommended that the filter cartridges be changed regularly, depending on usage of machine, or whenever they begin to restrict flow to the spray bars. The filter indicators on the Operations screen will indicate [CHANGE] when the flow becomes reduced. A Replacement Filter Set (2 Filters & 3 O-Rings) is available from PresSure Products Company. The PPC Part Number for the set is N29FILTERSET.

Filter Change ProcedureRemove the front compartment panel by turning the two black fasteners ½ turn counterclockwise. Tilt the panel out from the top, then lift up to remove it.

NOTE: The three O-rings must be replaced whenever the filters are replaced.

CAUTION: When changing filter cartridges, chemical protective gloves and eye protection should be worn.

In addition to the replacement parts, a container capable of holding two liters (1/2 gallon) of fluid is required.

FIG. 9 : FRONT COMPARTMENT

1. Turn the machine off. Close valves V1 and V2.2. Carefully unscrew one of the long filter housings by turning to the left, and catch

any spilled fluid in the container. Use the supplied filter wrench if necessary.

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V1

V2

PS1PS2

V3

3. Keeping the housing upright, remove it from the machine, remove and discard the old cartridge, empty the fluid, and thoroughly clean the housing. Note that the fluid and cartridge could contain hazardous materials, depending on what is being cleaned. Remove and discard the O-ring.

4. Replace the filter cartridge with a new one and verify that a new O-ring is properly seated in the groove.

5. Holding the new cartridge down, fill the housing to the O-ring groove with new fluid at the proper dilution. (The cartridge will tend to float.) Position the housing under its top, allow the cartridge to float upward, and engage the cartridge on the boss in the top. Lift the long housing and thread it into the top by turning to the right. The cartridge will seat on the boss in the long housing. Tighten securely (hand tight.)

6. Repeat for the other long housing.7. Unscrew the smaller filter housing and empty the fluid. Use the supplied filter

wrench if necessary.8. Thoroughly clean the bowl and scrape out any residue from the bottom. (This

filter does not employ a cartridge.) Replace the O-ring.9. Fill the small housing to the O-ring groove with new fluid at the proper

dilution.10. Reinstall the small housing with the new O-ring. Tighten securely (hand

tight.)11. Open the small bleed valves at the top right side of the long filter housings.12. Open valve V1.13. Quickly close the right bleed valve when fluid begins to flow through it. Leave

valve V1 fully open.14. Open valve V2.15. Quickly close the left bleed valve when fluid begins to flow through it. Leave

valve V2 fully open.16. Replace any lost fluid with an equal amount of fresh fluid at the proper dilution.17. Replace the front compartment panel.18. The machine is now ready to operate. NOTE: When starting the machine, it may take a short time for the pumps to prime.

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Pressure Switch AdjustmentIndividual pressure switches are provided on both the main and overflow pumps to indicate when the filters are beginning to become loaded. These switches are manually adjustable. The following procedure assumes clean filters are installed:

CAUTION: Eye protection should be worn for the duration of this procedure.

1. Remove the front compartment panel by turning the two black fasteners ½ turn counterclockwise. Tilt the panel out from the top, then lift up to remove it.

2. Turn the pumps on using the switch on the Operations screen.3. Ensure that a good spray pattern is present at both spray bars (it will be

necessary to depress the spring-loaded cover to observe the spray bars.) 4. Observe the indication of the filter change indicators on the Operations screen.5. The indicators will either indicate [OK] (green) or [CHANGE] (red).6. Beginning with the main loop, locate the pressure switch PS1 on the left hand

pump. (See Fig. 9).7. If the indicator for the [MAIN FILTER] is indicating [CHANGE] turn the

plastic wheel on PS1 CCW (toward lower pressure) until it changes to [OK].8. While someone is observing the rear spray nozzles, slowly close valve V2 (at the

bottom rear of the compartment) to restrict the flow and simulate filter loading. At the exact point when visible reduction in flow is noted, stop.

9. Turn the thumbwheel on pressure switch PS1 CW (toward higher pressure) so that the [MAIN FILTER] indicator turns to [CHANGE]. Back off ½ turn.

10.Reopen valve V2 to full open. Verify that the status indicator changes back to [OK]. The switch is now properly adjusted and will indicate when a filter change is needed.

11.Perform the same procedure on the overflow loop. Locate the pressure switch PS2 on the pump at the right side of the front compartment. (See Fig. 9).

12.If the indicator for the [OVRFLO FILT] is indicating [CHANGE] turn the plastic thumbwheel on PS2 CCW (toward lower pressure) until it changes to [OK].

13. While observing the front spray nozzles, slowly turn valve V1 (at the upper center of the compartment) clockwise to restrict the flow and simulate filter loading. At the exact point when visible reduction in flow is noted, stop.

14.Adjust the thumbwheel on pressure switch PS2 CW (toward higher pressure) so that the indicator just turns to [CHANGE]. Back off ½ turn.

15.Reopen valve V1 fully open. Verify that the [OVRFLO FILT] indicator changes back to [OK]. The switch is now properly adjusted and will indicate when a filter change is needed.

16. Replace the front compartment panel.

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Draining the Cleaning FluidNOTE: The cleaning fluid should be changed completely at least once a year. The filters must also be changed when this is done.

CAUTION: When handling cleaning fluid, chemical protective gloves and eye protection should be worn.

For draining the fluid, the machine must be put into the “maintenance mode.” This function basically disables the fluid level sensor. Switch the machine to maintenance mode as follows:

1. Remove the front compartment panel by turning the two black fasteners ½ turn counterclockwise. Tilt the panel out from the top, then lift up to remove it.

2. Bring up the “Manual Functions” screen as described in Section III.6.3. Touch the green and red [MODE] switch on the screen. The switch will then

change its status from [Normal] to [Maint.] Follow the same procedure to return from [Maint.] setting to [Normal].

CAUTION: Running the machine in the maintenance mode creates the risk of running the pumps dry, which might damage them. This mode should be used only when draining the machine, and only by trained personnel.

4. Return to the Operations Screen by pressing the [+] button twice.5. Turn off the pumps if they are running.6. Locate the short tube connected to the valve V3, and place the tube in a recovery

container of at least 15 gallon capacity. See Fig. 8.7. Open valve V3 and turn on the pumps.8. Watch the level in the tanks; when they are both empty, turn off the pumps. Do

not let the pumps run dry for an extended period or damage to the unit could result. Close valve V3.

9. Remove the three filter housings, pour out the fluid and discard the cartridges and O-rings. Clean the housings thoroughly. Note that the fluid and cartridges could contain hazardous materials, depending on what is being cleaned.

10.When finished, bring up the “Manual Functions” screen as described in Section III.6. Press the [MODE] button to return the machine’s [MODE] to [Normal].

11.Return to the Operations Screen by pressing the [+] button twice.12.Refer to Section III.2 for filling procedure.

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V. General Specifications

Dimensions : 0.85 meters wide x 0.95 meters high x 0.57 meters deep (33.4” x 37.4” x 22.4”)

Dry weight : 100 kg. (220 lbs.)

Fluid capacity : 55 liters (14.5 gallons)

Power supply : 220/240 volt, 1 phase, 50/60 Hz

Current : 20 amperes max

Electrical Plug: NEMA Type 6-20P (250 V, 20 A)

Mating Recept.: NEMA Type 6-20R (250 V, 20 A)

Filters: Spun Polypropylene - 5 micron, 20" Size (2 required)

O- Rings: Filter Housing O-Ring: Buna-N (3 required)

Noise: Less than 75 dB

Ultrasonics: 750 Watt, 40 KHz

Dryer: 530 CFM @ 0.45” Water SP; 1500 Watt heater

Fluid Heater: 312 Watt

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MACHINE SECURITY CODE

When the Security Code screen appears, depress

1 2 3 and ENTER.

Remove this page from manual to safeguard code if desired.

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