Labconco 44003 Series User manual

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SteamScrubber®& FlaskScrubber®
Glassware Washers
Models
44003 Series 44203 Series
44004 Series 44204 Series
FlaskScrubber®Vantage®Series
Glassware Washers
Model
4540031
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Labconco Corporation
8811 Prospect Avenue
Kansas City, MO 64132-2696
800-821-5525, 816-333-8811
FAX [phone]
E-MAIL [email protected]
HOME PAGE www.labconco.com
Glassware Washer
Service/Technical Manual
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Labconco SteamScrubber®, FlaskScrubber®, and
FlaskScrubber® Vantage® Model Glassware Washers
Table of Contents
Introductory Notes . . . . . . . . . . . . . . . . . . . . . . . . i
Labconco Service Support . . . . . . . . . . . . . . . . . . . . .ii
Glassware Washer Warranty. . . . . . . . . . . . . . . . . . . . iii
Section I (Navigating the Washers) . . . . . . . . . . . . . . . . 1
Washer Menus 1
Diagnostic Menu 2
Factory Reset 4
Washer Layout and Landmarks 4
Removing the Toe/Kick Panels & Service Panels 6
Removing the Washer Top, Back, and Side Panels 7
Section II (Maintenance and Modification). . . . . . . . . . . . . 8
Maintaining the Stainless Steel Interior 8
Maintaining the Tap Water Fill Valve 9
Cleaning the Sump Filter Screen 9
Maintaining the Air Gap in the Drain 10
Adjusting the Door Latch Keeper Strike Plate 11
Replacing the Washer Light Bulb 11
Maintaining the Conductivity Sensor 12
Replacing the HEPA Filter 13
Installing & Adjusting the Upper Rack 14
Making Adjustments to the Spindle Rack 15
Installation of the Cool Drain Water Kit 17
Installation of the Liquid Detergent Dispenser 18
Section III (Troubleshooting Alarms) . . . . . . . . . . . . . . .20
Basic Troubleshooting 20
Alarms 26
Water Low Alarm 27
Overfill (Water High) Alarm 29
Overflow Alarm 30
Liq Deter & Rinse Aid Alarms 32
Drain Fail Alarm 33
Low Temp Alarm, Erratic Temperature Display 37
& Temp Sensor Alarm
Section IV (Part Replacement Procedures) . . . . . . . . . . . . .40
Replacing the PC Board, Display Panel & Button Pad 40
Water Inlet Solenoid Valve Replacement 43
DI/Pure Water Pump Replacement 45
Water Level Pressure Switch/Hose Replacement 45
Replacing the Wash Pump 47
Replacing the Wash Arms 49
Replacing the Detergent Cup 49
Replacing the Sump Screen 50
Replacing the Sump Heating Element 51
Replacing the Blower 52
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Drain System Replacement/Installation 54
Replacing the Door Fan 57
Gasket Replacement 58
Section V (Testing Procedures) . . . . . . . . . . . . . . . . . .60
115/230V SteamScrubber® and FlaskScrubber® 60
230V FlaskScrubber® Vantage® 64
Section VI (Wiring Schematics) . . . . . . . . . . . . . . . . . .68
115V SteamScrubber® and FlaskScrubber® 69
230V SteamScrubber® and FlaskScrubber® 70
208/230V FlaskScrubber® Vantage® 71
Section VII (Parts). . . . . . . . . . . . . . . . . . . . . . . .72
FLASKSCRUBBER & STEAMSCRUBBER (9/07 to Present) 72
Accessories 74
FLASKSCRUBBER VANTAGE 74
Washer Conversion Parts: UC to FS 75
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Labconco Glassware Washer Service/Technical Manual
i
Introductory Note
The Labconco Glassware Washers were re-engineered in 2007, with the new line
available in September 2007. The new generation of Glassware Washers include
updated features and modifications that set itself apart from the previous
generations.
Some of these updates include (but are not limited to): an interactive
digital display, three separate pumps for wash, drain and pure water, a water
level pressure switch, and forced air blowers for drying.
The three types of Labconco Glassware Washers are, the FlaskScrubber®,
SteamScrubber®, and FlaskScrubber® Vantage®. The FlaskScrubber® and
SteamScrubber® are available in either 115 or 230 (high-heat) Volt models,
and Under-Counter (UC) or Free-Standing (FS) configurations. An optional
viewing window is also available on these models.
The FlaskScrubber® and FlaskScrubber® Vantage® use a direct jet manifold
system for washing, rinsing and drying. They both include a Lower Spindle
Rack. The spindles on this rack can be swapped out with different sizes
(tall, short, and thin) or removed to create a flat rack.
The SteamScrubber® includes both an upper and lower open rack. The racks are
able to accommodate a wide variety of accessories to contain specific types
of lab-ware. Drying is performed through an integrated blower circulating
forced, heated air through the tank.
The FlaskScrubber® Vantage® sets itself apart from the rest as Labconco’s
sophisticated Laboratory Glassware Washer. It has the same basic setup as
the FlaskScrubber® and is available only as a high-heat 230V version. It
also has a built-in side cabinet that houses HEPA filtered forced air drying,
Liquid Detergent, and Acid Neutralizing Rinse Pump systems. A peristaltic
pump automatically draws a programmed amount of LabSolutions Liquid Detergent
or LabSolutions Neutralizing Acid Rinse for automatic dispensing during wash
cycles, and shelf for holding the two bottles of detergent and rinse aid.
This document serves to provide service technicians and users with
supplementary instructions for the care of their washer.
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Labconco Glassware Washer Service/Technical Manual
ii
Labconco Service Support
Labconco prides itself on the personal touch it gives to supporting our
products. The customer and the product are supported by several departments.
At anytime, any of these departments can be contacted to provide additional
support.
For inquiries regarding the application of each washer and accessories,
contact the Marketing Department’s Product Specialist/Manager.
For assistance in selecting and ordering the washer and accessories that is
right for you, contact the Sales Support Representative for your geographical
region (which can be found by calling Labconco or visiting our website).
For help with electro-mechanical problems, service inquiries, troubleshooting
help, and Warranty issues, contact the Product Services Department.
To place orders for parts or disposables, contact Labconco’s Customer Service
Department.
All of these Labconco departments can be reached by:
•Calling Toll Free [phone]
•Emailing us at [email protected]
•Visiting us at www.labconco.com
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Labconco Glassware Washer Service/Technical Manual
iii
Copyright © 2008 Labconco Corporation. All rights reserved.
The information contained in this manual and the accompanying products are copyrighted and all rights reserved by
Labconco Corporation. Labconco Corporation reserves the right to make periodic design changes without
obligation to notify any person or entity of such change.
Returned or Damaged Goods
Do not return goods without the prior authorization from Labconco. Unauthorized returns will not be accepted. If
your shipment was damaged in transit, you must file a claim directly with the freight carrier. Labconco Corporation
and its dealers are not responsible for shipping damages.
The United States Interstate Commerce Commission rules require that claims be filed with the delivery carrier
within fifteen (15) days of delivery.
Limitation of Liability
The disposal and/or emission of substances used in connection with this equipment may be governed by various
federal, state, or local regulations. All users of this equipment are required to become familiar with any regulations
that apply in the user’s area concerning the dumping of waste materials in or upon water, land, or air and to comply
with such regulations. Labconco Corporation is held harmless with respect to user’s compliance with such
regulations.
Contacting Labconco Corporation
If you have questions that are not addressed in this manual, or if you need technical assistance, contact Labconco’s
Customer Service Department or Labconco’s Product Service Department at 1-800-821-5525 or 1-816-333-8811,
between the hours of 7:00 a.m. and 6:00 p.m., Central Standard Time.
Warranty
Labconco provides a warranty on all parts and factory workmanship. The warranty includes areas of
defective material and workmanship, provided such defect results from normal and proper use of the
equipment.
The warranty for all Labconco products will expire one year from date of installation or two years
from date of shipment from Labconco, whichever is sooner, except the following;
•Purifier® Logic™ Biological Safety Cabinets and PuriCare® Lab Animal Research Stations
carry a three-year warranty from date of installation or four years from date of shipment from
Labconco, whichever is sooner.
•SteamScrubber® & FlaskScrubber® Glassware Washers carry a two-year warranty from
date of installation or three years from date of shipment from Labconco, whichever is sooner.
•Blood Drawing Chairs carry a ten year warranty.
•Carts carry a lifetime warranty.
•Glassware is not warranted from breakage when dropped or mishandled.
This limited warranty covers parts and labor, but not transportation and insurance charges. In the
event of a warranty claim, contact Labconco Corporation or the dealer who sold you the product. If
the cause is determined to be a manufacturing fault, the dealer or Labconco Corporation will repair or
replace all defective parts to restore the unit to operation. Under no circumstances shall Labconco
Corporation be liable for indirect, consequential, or special damages of any kind. This statement may
be altered by a specific published amendment. No individual has authorization to alter the provisions
of this warranty policy or its amendments. Lamps and filters are not covered by this warranty.
Damage due to corrosion or accidental breakage is not covered.
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Labconco Glassware Washer Service/Technical Manual
1
SECTION I:
Navigating the New Labconco Glassware Washers
This section will familiarize you with the functions needed to
perform various services on the washers. This includes running
diagnostic tests, and a general landscape of the interior of the
washer (pictures included).
Washer Menus
The latch serves as the on/off switch for the washer. When the latch is
closed (to the right) the machine will come on. The screen will Read
“LABCONCO Glassware Washer” and then a 7 digit number followed by a letter.
This number is the model/part number of the logic/PC Board, and the letter is
the revision of the programming logic.
The screen will then, automatically, return to the previous screen before the
unit was turned off. If the washer was in the middle of a cycle, it will
continue where it left off; however if the wash motor was running and the
unit was turned off and back on, there is a restart delay.
If the screen displays the name of a wash cycle, pressing DISPLAY will bring
you to the cycle select menu.
To program and start a wash cycle
1. Close the washer door and slide the latch to the right. This energizes the
electronic control and the display will show the last program that was
run.
2. Press RUN to select this program.
3. If a different program is desired, press DISPLAY. The available programs
will be shown on the display.
4. Press the ▲or ▼buttons until the desired program is indicated by the
arrow on the left side. The arrow on the lower right side means that there
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Labconco Glassware Washer Service/Technical Manual
2
are additional program selections that will be shown on the display if the
▼button is pressed. If an arrow is visible in the upper right corner of
the display, additional program selections will be displayed when the ▲
button is pressed.
5. Press RUN if no modifications to the program are necessary.
6. If modifications to the program are necessary or you want to see the
parameters that are entered into the program, press DISPLAY and the
elements in the program that may be altered will be displayed.
7. Press the ▲and ▼buttons to select the parameter that must be altered as
indicated by the arrow on the left side. Press ◄and ►buttons to select
the appropriate set point. The arrow on the lower right side means that
there are additional parameter selections that will be shown on the
display if the ▼button is pressed. If an arrow is visible in the upper
right corner of the display, additional parameter selections will be
displayed when the ▲button is pressed.
8. Press RUN when all parameters are satisfactory.
The most helpful menu when performing service or after doing a part
replacement is the DIAGNOSTIC MENU.
Diagnostics Menu
To ensure your washer is operating properly, perform the diagnostics
procedure detailed below. It will take approximately 10 minutes to complete.
Refer to the figure below to familiarize yourself with the control panel
before you begin the procedure.
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Labconco Glassware Washer Service/Technical Manual
3
Running the diagnostics test
1. Press the ▲button on the control panel, close the door and slide the
door latch to the right. Hold for 5 seconds.
2. The display will show the Diagnostics screen and the indicator on the
left side will point to TAP WATER VALVE.
3. Press either the ►or ◄button to turn the tap water valve ON. Tap water
should enter the washer. Allow water to enter for approximately 1
minute. Press either the ►or ◄button to turn the water off.
4. Press the ▼button and the arrow on the display will point to PURE WATER.
5. Press either the ►or ◄button turn the pure water pump ON and open the
pure water valve. Allow pure water to enter the washer. After about 3
minutes the fill switch should cause the water flow to turn off. Should
not exceed 5 minutes. (SKIP IF NO PURE WATER IS USED)
6. Press the ▼button and the arrow on the display will point to WASH PUMP.
7. Press the ►or ◄button and the wash pump should energize.
8. Press the ▼button and the arrow on the display will point to DETERGENT
CUP.
9. Press either the ►or ◄button to energize the detergent cup. Within
about 1 minute the detergent cup door should be heard to open.
10. Press the ▼button and the arrow on the display will point to HEATER.
11. Press either the ►or ◄button and the heater will be energized.
12. Press the ▼button and the arrow on the display will point to DRAIN / COOL.
13. Press either the ►or ◄button and the drain will be energized. Allow
all water to be drained from the washer. The sound of the pump will
change when all water is drained. This will take about 1-1/2 to 2
minutes. If the Cool Water Drain Kit accessory has been installed, cool
water will mix with hot water draining from the washer.
14. Press the ▼button and the arrow on the display will point to DRY BLOWER.
15. Press either the ►or ◄button and the dry cycle blower will be
energized.
16. The ▼arrow in the lower right side of the display indicates that more
selections may be made. Press the ▼button to select the next function
to test. The arrow on the display will point to LIQ DETERG PUMP.
17. Press the ►or ◄button and if the liquid detergent accessory has been
installed and if it was activated in the Set Up procedure, the detergent
pump will operate.
18. Press the ▼button and the arrow on the display will point to LIGHT.
19. Press either the ►or ◄button and if the washer is equipped with a
window in the door, the light inside the washer will illuminate.
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Labconco Glassware Washer Service/Technical Manual
4
20. Press the ▼button and the arrow on the display will point to COOL FAN.
21. Press either the ►or ◄button, and the small fan inside the kick panel
will operate.
22. This completes the check of most of the washer functions. Unlatch the
door to exit from the Diagnostics mode.
23. To verify the proper operation of the overfill switch, repeat steps 1 & 2
above. Press either ►or ◄button and allow tap water to enter the tank
until the water flow turns off.
24. Press and hold the RUN button. Water will enter the washer and should
turn off before it overflows.
25. Press the ▼arrow until DRAIN/COOL is highlighted.
26. Press ►or ◄button to drain water from the washer.
27. Unlatch the door to exit from the Diagnostics mode.
Performing a Factory Reset
Like any computer and software, sometimes it is necessary to reset the PC
Board. If you experience a Lock-up on the display screen, or if your
programs aren’t being saved, follow the directions below to perform a FACTORY
RESET.
1. Open latch on door.
2. Close the latch on the door.
3. Press ▼button as the Display reads “Labconco Glassware Washer: Version X”
4. Release ▼button and display will show the “Set Up” screen.
5. Press ▼until FACTORY RESET is highlighted.
6. Press ►or ◄until “Yes” is displayed.
7. Press RUN.
Washer Layout and Landmarks
Before getting into the washer to perform service, it is important to know
where the major systems and their parts are. In the field, you will not have
the luxury of seeing where everything is, unimpeded. The pictures below
serve as a roadmap to systems in the base of the unit.
FlaskScrubber® SteamScrubber®
The pictures are shown in the same orientation, the front of the machines are
at the bottom of the photos.
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Labconco Glassware Washer Service/Technical Manual
5
Inlet Solenoid
Valves
(Blue) Top (rear)
Left
Electrically controlled to
allow water to fill the tank
of the machine.
DI/Pure Water Pump (Pink) Bottom(front)
Left
Integrated pump to allow the
use of a non-pressurized Pure
water source.
Wash Pump/Motor (Yellow) Top (rear)
Right
The pump has been moved away
from the sump in order to
minimize the occurrences of
motors being damaged by
leaks.
Drain Pump &
Solenoid
(Red) Bottom(front)
Right &
Center
When the machine sets to
drain, the Solenoid will
“pop” open, three seconds
later the drain pump will
kick on and the water will
leave the tank.
Drying Blower (Light
Green)
Left Center The blowers are different
between the FlaskScrubber®
and SteamScrubber®. These
blowers circulate air through
the tank to dry labware after
it has been washed.
Overflow Sensor (Dark
Green)
Top (rear)
Center
This sensor is a set of
contacts that when wet have
continuity, signaling the
washer that there is water in
the base weldment pan.
FlaskScrubber® SteamScrubber®
These illustrations are to be compared with the photos on the previous page
and are in the same orientation with the colored circles representing the
same parts. The Purple Circle in the middle represents the Pump Outlet
Elbow.
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Labconco Glassware Washer Service/Technical Manual
6
Removing the Toe/Kick Panels &
Service Panels (Under-Counter Models)
For many cleaning, maintenance and repair jobs associated with the
FlaskScrubber® and/or SteamScrubber®, the toe & kick panels will need
to be removed. This will help gain access to parts inside the base of
the washer and is necessary for initial install of the machine.
Remove the Toe/Kick Panel
1. Remove the two screws located at the bottom of the panel.
2. Remove 2 screws on each side of the middle panel.
3. Pull the middle panel forward and remove it.
4. Remove the cover over the electrical junction box by removing the two
screws, disconnecting the wiring connections for the door fan and
sliding the panel out to the left side. Avoid damaging the Ribbon
cable and Door Harness.
Removing the Back and Side Service Panels
Locate each of these panels beneath the insulation jacket of the Under-
Counter Models. There are four bolts holding each panel on. Simply remove
the bolts and pull off the plates.
When replacing the plates, make sure they are properly aligned and in the
correct orientation on the machine.
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Labconco Glassware Washer Service/Technical Manual
7
Removing the Washer Top, Back, and Side Panels
(Free-Standing models only)
To gain access to internal parts of the washer you will need to remove
the washer’s top, back, and side panels. This will make it possible
to clean, maintain, and repair the washer. Refer to the figure below
and follow the instructions to remove the top, back, and side panels
of your washer.
To Remove the Cosmetic paneling of the Washer
1. Turn off electrical power to the Glassware washer.
2. Remove all of the screws from the back panel of the washer and remove
the back panel.
3. Remove the 2 screws at the kick panel.
4. Remove the 2 screws at the rear that hold the sides to the top.
5. Remove the two screws from each side of the washer at the front edge.
6. Remove the side panels.
7. Remove the 2 screws that hold the top.
8. Remove the top
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Labconco Glassware Washer Service/Technical Manual
8
SECTION II:
Maintaining and Modifying the Glassware Washers
Like any piece of laboratory equipment, the glassware washer
requires some routine maintenance and, depending on the
laboratory’s function, some modification. Section II contains
instructions on how to perform upkeep and application driven
changes.
Maintenance
Maintaining the Stainless Steel Interior
The interior of the FlaskScrubber® and SteamScrubber® Glassware
Washers is type 304 stainless steel. Never use metal scouring pads on
the stainless steel interior. Metal scouring pads can scratch or
leave metal chips that will rust.
To maintain the appearance and quality of the stainless steel interior,
perform the following tasks as needed:
•Wipe the outer edges on the inside door panel to remove particles and
residue that occur during loading.
•Use a sponge sprinkled with non-abrasive stainless steel cleaner to
gently wipe the washer tank and door to remove surface discoloration
caused by exposure to halogenated compounds or steel parts. In some
cases, the finish may be slightly dulled by this action.
If the hot tap water source has a high mineral content, film or spots may
develop on the washer interior. If the procedures listed above do not
eliminate the film or spots, you may run your washer through the special
cycle below.
To remove film or spots from the washer interior*
1. Remove all glassware from the washer.
2. Choose the Glass Program: Push the “Display” button. Using the arrow
buttons, make sure that “steam” is off, that there are zero, “0”, Pure
rinses, and the drying time is set to zero.
3. After the first fill is complete, open the washer and carefully pour
one cup of bleach into the bottom of the tank.
4. Close the washer door and allow the unit to wash and drain.
5. When the washer fills the second time, open the washer and add two cups
of 4-8% acetic acid or white vinegar to the bottom of the tank.
6. Close the washer door and allow the unit to wash and drain without
further interruption.
* If there is residue on the glassware and the washer is not utilizing the
purified water for rinsing, you can also use vinegar to break up the residue
during a “Rinse Only” cycle.
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Labconco Glassware Washer Service/Technical Manual
9
Maintaining the Water Fill Valve
The filter screen of the water fill valve, illustrated below, may
require periodic cleaning to remove trapped particles. A low water
fill occurs if the blockage is not removed.
To Clean the Water fill valve
1. Turn off the water and electrical power to the washer. Unplug the
Mobile model; turn off the circuit breaker that services the Under-
Counter or Freestanding model.
2. Remove the rear panel of Free-Standing models.
3. Disconnect the water supply tube that is connected to the valve.
4. Remove the valve from the base.
5. Remove the four screws from the valve plate and separate the valve from
the inlet connection.
6. Remove the valve filter screen and clean it under running water
7. Replace the screen and reassemble the valve connection. Be certain the
O-ring gasket is positioned in the groove in the fill valve body.
Cleaning the Sump Filter Screen
If debris has accumulated on the filter screen (located in the washer
sump), you can remove and clean the screen. To clean the sump filter
screen, refer to the figure and instructions below.
To clean the sump filter screen
1. Open the washer door and remove the bottom rack.
2. Remove the screw that retains the filter screen.
3. Carefully lift the screen and pull forward, using care not to drop
debris into the sump.*
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Labconco Glassware Washer Service/Technical Manual
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* Debris that falls into the sump can damage and/or destroy the wash and
drain pumps.
To Replace the Filter Screen
If the filter screen is damaged or too dirty to clean and needs to be
replaced follow the instructions above to remove the original filter screen
and keep the hardware. Once removed, position the new screen and insert the
holding screw in place. Make sure that the 1/8” drilled hole is located
below the water distribution channel.
Maintaining the Air Gap in the Drain
If the installation included an air gap (recommended) it requires
periodic cleaning. The air gap is not part of the washer; therefore,
it is not covered by the washer’s warranty. The air gap protects the
washer against water backing up in the event of a clogged drain.
Check the air gap for build-up any time your washer is not draining
well.
Most types of air gaps are easy to clean. Simply follow the manufacturer’s
directions for maintaining your air gap.
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Labconco Glassware Washer Service/Technical Manual
11
Adjusting the Door Latch Keeper Strike Plate
If, when the door is closed and latched, the latch is loose, or the
machine turns off during a cycle due to vibration or bumping, then you
may need to adjust the Door Latch Keeper/Strike Plate.
Adjusting the Door Latch Keeper/Strike Plate
1. Open the door to the glassware washer.
2. Loosen the two screws indicated by the Red Arrows.
3. To tighten the latching action of the Door Latch, move the plate in the
direction of the Blue Arrow.
4. To loosen the latching action of the Door Latch, move the plate in the
direction of the Yellow Arrow.
NOTE: If this fails to correct the problem, perform electrical
troubleshooting on the Door Switch (located behind the plastic Control
Panel). The Door Switch Assembly may need to be replaced.
Replacing the Washer Light Bulb
If the Glassware washer is equipped with a window, you will need to
periodically replace the light bulb. Refer to the figure below and follow
the instructions to replace the washer light bulb.
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Labconco Glassware Washer Service/Technical Manual
12
To replace the washer light bulb
1. Turn off electrical power to the Glassware Washer.
2. Remove the lower and middle panels as described in Removing the
toe/kick panels.
3. Disconnect the springs on each side that connect the pivot brackets to
the washer base. Disconnect the hook on the washer base side.
4. Remove the two screws on each side of the outer door panel. Lower the
panel and remove it.
5. Remove the bulb by pressing in on the bulb and rotating it counter-
clockwise.
6. Insert the new bulb and rotate clockwise into place.
7. Replace the outer door panel.
Maintaining the Conductivity Sensor
(FlaskScrubber® Vantage® only)
The operation of the Conductivity Sensor may degrade if it becomes
contaminated with soil from glassware that has not been rinsed prior to being
placed into the washer or if it becomes coated with minerals from the water
supplied to the washer. If cleaning the sensor fails to correct the problem,
the sensor must be replaced. If the interior of the washer is discolored and
appears to be coated with a film, there is a good possibility that the
conductivity sensor is also coated. Follow the directions for removing film
or spots from the washer interior described in Maintaining the Stainless
Steel Interior.
To clean the conductivity sensor
If the soil from unrinsed glassware has coated the sensor, the sensor may be
cleaned using a solvent compatible with the soil. Remove the sump filter
screw as described in Cleaning the Sump Filter Screen. Using a swab
moistened with solvent, remove the soil from metal parts inside the tubular
portion.
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Labconco Glassware Washer Service/Technical Manual
13
To replace the conductivity sensor
1. Turn off the electrical power to the washer. Turn off the circuit
breaker that services the washer.
2. Remove the cabinet back panel.
3. Unplug the sensor from the wiring harness.
4. Unscrew the sensor from the sump housing.
5. Reverse this procedure when installing a new sensor.
Note: When replacing the sensor, use Teflon Tape on pipe threading.
Replacing the HEPA Filter
(FlaskScrubber® Vantage® only)
After an extended period of time, dirt and debris may block the air flow
through the HEPA filter.
1. Open the left (side cabinet) door by pressing it in the center to
release the latch.
2. Press down on the lock tab on the top of the HEPA filter and pull the
top of the filter outwards.
3. Lift the filter out of the bottom retainer.
4. Reverse this procedure to install the replacement HEPA Filter.
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