Miele professional PLW 6111 User manual

It is essential to read these operating instructions
before installing and using the machine. This
prevents both personal injury and damage to the
machine.
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en – US
Operating Instructions
Laboratory Glassware Washer
Model PLW 6111

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CONTENTS
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Contents
1.GENERAL RULES .....................................................................................................6
1.1Limitation of liability............................................................................................................... 6
1.2Validity, content, and storage ............................................................................................... 6
2.PRODUCT INFORMATION .......................................................................................7
2.1Appropriate use ...................................................................................................................... 8
2.2IMPORTANT SAFETY INSTRUCTIONS ................................................................................ 9
Appropriate use .................................................................................................................... 9
Danger of injury..................................................................................................................... 9
Quality assurance ............................................................................................................... 11
Safety with children ............................................................................................................ 12
Using accessories .............................................................................................................. 13
Disposing of your old machine........................................................................................... 13
Warning signs ..................................................................................................................... 13
2.3Technical data ...................................................................................................................... 14
2.4Recommendations for correct use..................................................................................... 15
2.5Training.................................................................................................................................. 16
User profiles........................................................................................................................ 16
3.INSTALLATION .......................................................................................................17
3.1Water connection ................................................................................................................. 17
Water quality....................................................................................................................... 17
Information:......................................................................................................................... 18
3.2Electrical connection ........................................................................................................... 19
4.DISPENSING ...........................................................................................................20
4.1Fill level sensor ..................................................................................................................... 20
4.2Dispensing quantity control ................................................................................................ 20
4.3Refilling process chemicals ................................................................................................ 20
4.4Warning! ................................................................................................................................ 21
5.OPERATION ............................................................................................................22
5.1Checking consumption........................................................................................................ 22
5.2Opening and closing the door............................................................................................. 22
Emergency release ............................................................................................................. 23
5.3Turning the machine on....................................................................................................... 24
5.4Preparation ........................................................................................................................... 24
Checks at the end of a program......................................................................................... 25
6.CONTROL PANEL AND SYMBOLS USED ............................................................26
6.1Control panel ........................................................................................................................ 26
6.2Buttons .................................................................................................................................. 27
Audible signal ..................................................................................................................... 27
6.3Display ................................................................................................................................... 28

CONTENTS
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7.PROGRAMS ............................................................................................................31
7.1Program blocks .................................................................................................................... 32
7.2Program chart....................................................................................................................... 33
7.3Starting a program ............................................................................................................... 37
8.MACHINE STATUS .................................................................................................38
8.1Ready for operation ............................................................................................................. 38
8.2Program................................................................................................................................. 38
8.3Malfunctioning...................................................................................................................... 38
8.4Power failure......................................................................................................................... 39
8.5Reset...................................................................................................................................... 39
9.MENU.......................................................................................................................40
9.1Accessing the menu............................................................................................................. 40
9.2Parameter settings............................................................................................................... 41
9.3Parameter list ....................................................................................................................... 41
10.CLOCK..................................................................................................................... 42
11.AUDIBLE SIGNAL ...................................................................................................42
12.HISTORICAL DATA (batch protocols)...................................................................42
12.1Outputting previous batch protocols ................................................................................. 42
13.WARNINGS AND EVENTS LIST .............................................................................43
13.1List of warnings .................................................................................................................... 43
13.2List of display messages ..................................................................................................... 45
14.USB port (optional) .................................................................................................46
15.Process documentation.........................................................................................47
15.1Serial interface...................................................................................................................... 47
15.2User administration.............................................................................................................. 47
15.3USB port ................................................................................................................................ 47
16.MAINTENANCE....................................................................................................... 48
16.1General recommendations on maintenance ..................................................................... 48
Machine status ................................................................................................................... 48
Safety systems ................................................................................................................... 48
Procedure ........................................................................................................................... 48
Decontamination procedures ............................................................................................. 48
16.2Maintenance reminder......................................................................................................... 49
16.3Routine maintenance work ................................................................................................. 49
16.4Table of routine maintenance tasks................................................................................... 49
16.5Drying air filtration................................................................................................................ 54
16.6Special maintenance............................................................................................................ 54
Table of special maintenance work.................................................................................... 54
17.PROBLEMS – CAUSES – Remedy.........................................................................55
17.1Introduction........................................................................................................................... 55
17.2Problems (P) – Causes (C) – Remedy (R) ........................................................................... 55

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CONTENTS
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18.DISPOSING OF YOUR OLD MACHINE .................................................................56

GENERAL RULES
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1. GENERAL RULES
The Laboratory Glassware Washer is generally referred to as “the machine” in these operating
instructions. Reprocessable laboratory glassware and utensils are referred to as “wash items” if
they are not more closely defined.
1.1 Limitation of liability
The manufacturer shall not be held liable for faults or problems which arise due to tampering,
incorrect, or improper use/operation of the machine.
The operator must comply with all instructions set forth in the operating instructions, most
notably:
Always observe the intended use of the machine.
Required maintenance should always be performed promptly.
Use of the machine should be limited to persons who have been properly trained and
instructed.
Use only original spare parts.
Any modifications, adaptation, or similar which may be made to machines which are subsequently
placed on the market do not oblige the manufacturer to intervene on previously supplied
machines, nor to consider the related operating instructions lacking and inadequate.
The operating instructions on the following pages are designed to guarantee the longevity and
functionality of your machine.
The instructions in this manual do not replace, but rather supplement employer requirements to
adhere with local codes and standards of prevention and safety.
1.2 Validity, content, and storage
It is important to keep these operating instructions with the machine for future reference.
If the machine is sold or transferred, the operating instructions must be handed over to the new
owners or users so that they can become acquainted with its functioning and the IMPORTANT
SAFETY INSTRUCTIONS.
It is essential to read these operating instructions before installing and using the machine.

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PRODUCT INFORMATION
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2. PRODUCT INFORMATION
Before starting work, the user must be completely familiar with the functions and proper operation
of the machine. They must know the precise functions of all command and control devices of the
machine.
PLW 6111

PRODUCT INFORMATION
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2.1 Appropriate use
This machine is used to wash laboratory glassware and utensils using water. The process includes
cleaning, rinsing and, where required, drying. Please be certain the items are suitable for cleaning
in a laboratory glassware washer.
This will depend on its use and the type of soiling present as well as the washing parameters.
Please refer to the information provided by the manufacturer of the laboratory glassware and
laboratory utensils.
Laboratory glassware and laboratory utensils suitable for reprocessing include:
Vessels such as test tubes, beakers, flasks, cylinders, etc.
Measuring vessels such as measuring cylinders, pipettes, volumetric flasks, etc.
Dishes such as petri dishes, watch glasses, etc.
Plates such as slides, sequencing plates, etc.
Small items such as lids, spatulas, magnetic stirring rods, stoppers, etc.
Other items such as funnels, pipe/hose pieces, etc.
EXAMPLES OF APPLICATION AREAS:
Laboratories in schools, colleges, and universities
Research, quality assurance, development, technology, and production
Different areas of inorganic, organic, analytical, and physical chemistry
Biology, microbiology, and biotechnology
Industrial laboratories
Reprocessing conditions must be suitable for the wash items and for the type of stain. Process
chemicals must be suitable for the type of soiling and for methods of analysis being used.
The use of a suitable load carrier (mobile unit, basket, module, insert, etc.) is important to ensure
adequate reprocessing of the wash items.
The machine can be qualified for process validation.
This unit is certified to an ANSI/UL Standard.
WARNING
Improper use can lead to personal injury and damage to property.
Miele cannot be held liable for damage resulting from incorrect or improper
use or operation.

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PRODUCT INFORMATION
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2.2 IMPORTANT SAFETY INSTRUCTIONS
This machine complies with all statutory safety requirements. Improper use can lead to personal
injury and damage to property.
Read the operating instructions carefully before using this machine. This will help prevent the
likelihood of both personal injury and damage to the machine.
Keep these instructions in a safe place where they are accessible to users at all times.
Appropriate use
Use of the machine is only approved for the applications stated in the operating instructions.
Conversions, modifications, and any other use are not permitted and could be dangerous.
The cleaning and washing processes are only designed for laboratory glassware and utensils
which are designated as reprocessable by the manufacturer. The information provided by the
manufacturer of the wash items must be observed.
Miele cannot be held liable for damage resulting from incorrect or improper use or operation.
This machine is intended for indoor use in a stationary location only.
Danger of injury
Please pay attention to the following notes to avoid injury
The machine should only be installed, commissioned, repaired, and maintained by Miele
Technical Service or a suitably qualified service technician. A Miele service contract is
recommended . Incorrect repairs can cause considerable danger to users.
Do not install the machine in an area where there is any risk of explosion or of freezing
conditions.
In order to reduce the risk of water damage, the area around the machine should be limited to
cabinetry and fittings that are designed for use in commercial environments.
Some metal parts pose a risk of injury/being cut. Wear cut-resistant protective gloves when
transporting and setting up the machine.
If the machine is built under a countertop, it must only be installed under a continuous
countertop run which is firmly secured to adjacent units to improve stability.
The electrical safety of the machine can only be guaranteed when correctly grounded. It is
essential that this standard safety requirement is observed and regularly tested. If in any doubt,
please have the electrical installation inspected by a qualified electrician. Miele cannot be held
liable for the consequences of an inadequate grounding system (e.g., electric shock).
A damaged or leaking machine can pose a threat to your safety. Always switch off a damaged
or leaking machine immediately and contact Miele Technical Service.
Machine operators should be instructed on the use of the machine and trained regularly.
Untrained personnel must not be allowed access to the machine or its controls.
Only use process chemicals which have been approved by their manufacturer for the relevant
application. The manufacturer of the process chemicals is liable for any negative influences on the
material of the wash items and the machine.
Exercise caution when handling process chemicals. Some chemicals may be caustic,
irritating, and toxic.
The relevant safety codes and safety data sheets issued by the process chemical manufacturers
must be observed.
Wear gloves and protective goggles.

PRODUCT INFORMATION
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The machine is only intended for use with water and suitable process chemicals. The use of
organic solvents or flammable liquids is not permitted.
This could cause an explosion or damage rubber or plastic components in the machine and cause
liquids to leak out of it.
The water in the wash chamber must not be used as drinking water.
Do not lift the machine by protruding parts such as the door handle or the opened service flap
as these could be damaged or torn off.
Do not sit or lean on the opened door. This could cause the machine to tip over and become
damaged or cause an injury.
Be careful when sorting wash items with sharp, pointed ends. Position them in the machine so
that you will not hurt yourself or create a danger for others.
Broken glass can result in serious injury when loading or unloading. Broken glass wash items
must not be processed in the machine.
Please be aware that the machine may be operating at high temperatures. Deactivating the
lock to open the door can result in a risk of burning or scalding, or contact with corrosive
substances.
Should personnel accidentally come into contact with toxic vapors or process chemicals,
follow the emergency instructions given in the chemical manufacturer's safety data sheets.
Load carriers such as baskets, mobile units, and inserts must be allowed to cool down before
they are unloaded. Any water remaining in containers should be emptied into the chamber before
removing items.
Never clean the machine or near vicinity with a water hose or a pressure washer.
The machine must be disconnected from the power supply before any maintenance or repair
work is carried out.

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PRODUCT INFORMATION
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Quality assurance
The following points should be observed to assist in maintaining quality standards when
reprocessing laboratory glassware and utensils and to avoid damage to the wash items
being cleaned.
Only authorized personnel may interrupt a program in exceptional circumstances.
It is the responsibility of the operator to ensure reprocessing standards in routine operation.
Process results must be inspected and documented on a regular basis.
Only reprocess undamaged and suitable wash items. When washing plastic items, ensure that
they are thermally resistant. Nickel-plated wash items and items made of aluminum require
special procedures and are not generally suitable for machine reprocessing. Ferrous materials that
can rust or corrode must not be introduced into the wash chamber as wash items or as stains.
Under certain circumstances, process chemicals can result in damage to the machine. Users
are urged to follow the recommendations issued by manufacturers of process chemicals. Contact
Miele in the event of damage and any suspicion of material incompatibility.
Do not use bleach in the machine. Do not allow the wash chamber to come into contact with
Hydrochloric Acid, HCl. This will void the warranty and damage will not be covered.
Abrasive substances should not be introduced into the machine as these could cause
damage to mechanical components in the water circuit. Abrasive residues on the wash items
must be removed completely before reprocessing.
Pre-treatment with cleaning agents, some types of stains, and the interaction of certain
process chemicals can create foam. Foam can have an adverse effect on the cleaning result.
Reprocessing should not result in foam being discharged from the chamber. Foam discharge
can compromise the operation of the machine.
The process used must be monitored on a regular basis by the operator to check foaming
levels.
Even when a process chemical, e.g., detergent, is recommended, Miele takes no
responsibility for the effect of such chemicals on the wash items. Please note that changes in
product formulation, storage conditions, etc. which are not announced by manufacturers of
process chemicals may impair the quality of cleaning results.
Always follow the relevant manufacturer's instructions on storage and disposal of process
chemicals.
In critical applications where very stringent requirements have to be met, it is strongly
recommended that all the relevant factors for the process (detergent, water quality, etc.) are
discussed with Miele.
If the cleaning result is subject to particularly stringent requirements (e.g., chemical analysis),
regular quality control should be carried out by the operator to ensure that required standards of
cleanliness are being achieved.
Load carriers such as mobile units, baskets, and inserts which hold the wash items must be
used only as intended.
The interior of lumened wash items must be thoroughly flushed through with wash water.
Secure small and light wash items with cover nets or place in a mesh tray for small items, so
that they do not block the spray arms.
Empty any containers or utensils before loading them.
The amount of residual solvents on wash items going into the wash chamber should be
minimal.
There should be no more than a trace of any solvents with a flash point of below 70°F (21°C).
Chloride solutions, in particular hydrochloric acid, or ferrous materials that can rust or corrode
must not be placed in the chamber.

PRODUCT INFORMATION
REV.0.01_COD.650183_A4 Page 12
Ensure that solutions or steam containing chlorides or hydrochloric acid do not come into
contact with the stainless steel outer casing of the machine in order to avoid any damage through
corrosion.
After any plumbing work, the water pipework to the machine will need to be vented. If this is
not done, machine components can be damaged.
The gaps between a built-in machine and adjacent cabinetry must not be sealed, e.g., with
silicone sealant, as this could compromise the ventilation of the circulation pump.
Follow the installation instructions in the operating and installation instructions.
Safety with children
Children should be supervised in the vicinity of the machine. Do not allow children to play with
the machine. There is a danger that children might shut themselves in the machine.
Children must not use the machine.
Keep children away from process chemicals. These contain irritant and corrosive ingredients
which can cause burning in the eyes, mouth, and throat, or inhibit breathing Observe the safety
data sheets for the process chemicals.
Seek medical advice immediately if exposure to process chemicals occurs, (ingestion or eye
contamination).

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PRODUCT INFORMATION
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Using accessories
Only use genuine Miele original spare parts and accessories suitable for the application they
are required for. Model designations are available from Miele.
Only use Miele Load Carriers, such as mobile units, baskets, modules, and inserts. Using
mobile units, baskets, and inserts made by other manufacturers or making modifications to Miele
accessories can result in unsatisfactory cleaning results. Any resultant damage would not be
covered by the guarantee.
Disposing of your old machine
Please note the machine may be contaminated and should be decontaminated before
disposal or recycling.
For environmental and safety reasons, dispose of all process-chemical residues in accordance
with safety regulations. Wear gloves and protective goggles.
Make the door lock inoperable, so that children cannot accidentally shut themselves in. Then
make appropriate arrangements for safe disposal of the machine.
Warning signs
In order to inform users of their obligations and to warn of risks, the machine is equipped with
warning signs in accordance with valid legislation.
General warning signs
Warning!
Danger of electric shock!
Warning!
Observe the operating
instructions!
Warning!
Hot surfaces!
Health and safety risks on site are evaluated along with residual risks in order to determine the
safety equipment which the operator must provide for the user.
Miele declines all responsibility for damage or injury caused by noncompliance with the
IMPORTANT SAFETY INSTRUCTIONS.

PRODUCT INFORMATION
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2.3 Technical data
PLW 6111
Width 25 9/16" (650 mm)
Depth with closed door 27 1/16" (687 mm)
Height 73 5/8" (1,870 mm)
Total weight 520 lb (236 kg)
Average sound pressure level < 70 dB (A)
Type of protection
(according to IEC 60529)
IP21
Backflow preventer
(according to EN 1717)
The hexagonal symbol indicates that the equipment is
provided with a backflow preventer; the two letters
inside the hexagon indicate the protection family and the
protection type of that family. (EN 1717)
AA – Air gap not limited
Operation Temperature range +41 to + 104°F (+5 to +40°C);
Relative humidity range 20 to 90% without
condensation.
Maximum altitude: 6561 ft (2,000 m) (special versions of
the device are available for higher altitudes).
Storage and transportation conditions -5 ... +122°F (+50°C)
20% to 90% without condensation
500 hPa to 1,060 hPa
Manufacturer's address Steelco S.p.A
Via Balegante, 27
31039 Riese Pio X (TV), Italy

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PRODUCT INFORMATION
REV.0.01_COD.650183_A4 Page 15
2.4 Recommendations for correct use
The user must supervise the machine during the program.
Only use process chemicals which have been approved by their manufacturer for the
relevant application. The manufacturer of the process chemicals is liable for any negative
influences on the material of the wash items and the machine.
To prevent contact with contaminated material, appropriate personal protective equipment
must be worn during reprocessing.
Do not reprocess wash items containing substances which, in accordance with the current
legislation, must not be discharged into the sewage system. These substances must be
disposed of separately.
Recommending process chemicals does not render the manufacturer responsible for any
damage to processed materials and wash items.
Follow the manufacturer’s instructions as well as national requirements and guidelines
relating to the machine-based reprocessing of the wash items.
The machine is only intended for use with water and process chemicals.
The use of organic solvents or flammable liquids is not permitted as there is a risk of
explosion. Such substances can also result in premature wear on components.
Solvent residues, chloride solutions, and acids, particularly hydrochloric acid, can damage
steel components and must not be placed in the machine. 
Do not use powder detergents.
Do not use domestic detergents.
Accessories which are not approved by the manufacturer may compromise reprocessing
results as well as user safety.
The user must carry out a general check-up and clean the appliance regularly as indicated
in the maintenance instructions.
Carry out a visual check of the wash items for cleanliness.
The on-site water supply valve must be easily accessible so that the water supply can be
turned off when the machine is not in use.

PRODUCT INFORMATION
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2.5 Training
Instructions for use of the machine will be provided by Miele Technical Service or an authorized
service technician during machine commissioning.
It is the duty of the operator to ensure that users are sufficiently trained and instructed.
User profiles
User profiles are identified as follows:
SERVICE Service technician
The machine should only be installed, commissioned, repaired, and maintained by
Miele Technical Service or an authorized service technician.
ADMIN Responsible for the machine in the workplace:
More advanced tasks, e.g., interrupting or canceling a program, require more
detailed knowledge of machine reprocessing of laboratory glassware and utensils.
Alterations or adaptations of the machine, e.g., to accessories used or on-site
conditions, require additional specific knowledge of the machine.
Validation processes assume specialist knowledge about machine reprocessing of
laboratory glassware and utensils, the processes involved, and applicable
standards and legislation.
USER User:
Users must be instructed in operating and loading the machine and trained
regularly to guarantee safe daily use.
They require knowledge of machine reprocessing of laboratory glassware and
utensils.

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INSTALLATION
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3. INSTALLATION
3.1 Water connection
Water quality
The quality of the water used in all the cleaning stages is essential in achieving good results.
The water must be compatible with the material from which the machine is made.
The water must be compatible with process chemicals.
The water must be compatible with process requirements for the various stages of the
process.
In order to achieve good reprocessing results, the machine requires a supply of soft water with a
low calcium content. Hard water results in the build-up of calcium deposits on the wash items and
on the inner walls of the wash chamber.
Water with a hardness level higher than 4 gpg (0.7 mmol/l) must be softened. This occurs
automatically during a program sequence on machines with a built-in water softener (option ex
works). The water softener must be set to the exact hardness of the water.
The water softener must be reactivated at regular intervals. This requires the use of special
reactivation salt. Reactivation is carried out automatically during a program sequence.
Softened water must be provided on site for machines without a built-in water softener.
Note: The water hardness is set by Miele Technical Service or a trained technician.
WARNING
Water from the chamber is not suitable for drinking!
The machine must be connected to the water supply in strict accordance with local regulations.
The water used must at least comply with national codes for drinking water quality. If the water
supply has a high iron content, there is a danger of corrosion occurring on wash items being
cleaned in the Laboratory Glassware Washer, as well as the machine itself. If the chloride content
of the water exceeds 100 mg/l, the risk of corrosion to wash items in the machine will be further
increased.
In certain regions (e.g., mountainous areas), the water composition may cause precipitates to
form, requiring the use of softened water in the steam condenser.
The Laboratory Glassware Washer is supplied as standard for connection to cold water (blue
coded hose) and hot water up to max. 140°F/60°C (red coded hose). Connect the intake hoses to
the supply valves for cold and hot water.
If no hot water supply is available, the red coded inlet hose for the hot water connection must also
be connected to the cold water supply.
The minimum flow pressure for cold water, hot water, and the DI water supply is 14.5 psi (100
kPa).
The recommended flow pressure is ≥ 29 psi (200 kPa) for the cold and hot water connections
and ≥ 29 psi (200 kPa) for the DI water supply in order to avoid excessively long water intake
times.
The maximum permissible static water pressure is 116 psi (800 kPa).
A booster pump is required if the flow pressure is below 14.5 psi (100 kPa). If the pressure is
higher than 116 psi (800 kPa), a pressure reducer must be installed.

INSTALLATION
REV.0.01_COD.650183_A4 Page 18
If water pressure is not within the specified range, contact Miele Technical Service or an
authorized service technician for advice.
A supply valve with a ¾” threaded union must be provided on-site. The valve should be easily
accessible, since the water supply should be shut off whenever the machine is not in use.
WARNING
Do not overtighten the threaded unions on the hoses.
Information:
A backflow preventer is not required. The machine complies with the applicable European
standards for the protection of drinking water.
The machine is equipped with a backflow preventer according to EN 1717.
If no hot water supply is available, the red coded inlet hose for the hot water connection
must also be connected to the cold water supply.
A Y-piece can be used to connect both hoses to the cold water supply.
Miele declines all responsibility for damage or injury caused by noncompliance with the
IMPORTANT SAFETY INSTRUCTIONS.
Non-compliance with the above conditions will render the warranty invalid.
WARNING
When the machine is not in operation, always close the faucets.

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INSTALLATION
REV.0.01_COD.650183_A4 Page 19
3.2 Electrical connection
WARNING
Only qualified, skilled personnel may connect the machine to the power
supply in accordance with local code.
The machine must only be operated with the voltage, frequency, and fuse rating shown on
the data tag.
The power supply voltage must not differ from its nominal value by more than +/-10%.
The frequency of the power supply must not differ from its nominal value by more than 1%.
The electrical safety of the machine can only be guaranteed when it is correctly grounded.
Equipotential bonding is required.
Make sure that the electrical systems are properly grounded.
The ground conductor is to be connected to the ground terminal
identified by the standard symbol.
If the machine is hard wired to the power supply, connection
should be made via a power switch with all-pole isolation. The
power switch must be designed to operate at the rated current.
For increased safety, it is recommended to protect the machine with a suitable residual
current device (RCD) with a trip current of 30 mA.
The machine should be disconnected from the power supply when not used for a longer
period of time.
The electrical connection and fuse rating must comply with local and national regulations.
WARNING
Please refer to the installation plan provided.

DISPENSING
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4. DISPENSING
The dispensing system for process chemicals comprises:
1 dispenser pump (DOS1) for detergent
1 dispenser pump (DOS 3) for neutralizing agent
Fill level sensor
The system is equipped with flow meters.
Additional dispenser pumps can be installed by Miele Technical Service or an authorized service
technician.
4.1 Fill level sensor
Each dispenser pump is equipped with a fill level sensor that monitors the fill level in the process
chemical canisters. A lack of product is indicated on the display.
4.2 Dispensing quantity control
Each dispenser pump is monitored by a flow meter. This electronic device monitors the volume of
product dispensed.
4.3 Refilling process chemicals
Replace an empty container as follows:
Have a new container with process chemicals ready.
Open the door in the toe-kick of the machine.
Remove the suction wand and place it on a chemical-resistant and easy-to-clean surface.
Insert the suction wand into the new container.
Place the container back in the toe-kick of the machine.
Close the door in the toe-kick.
Start the appropriate program for venting the DOS pump (see the “Fill DOS (1–4)” program
table).
WARNING
Only use process chemicals designed specifically for use in the machine and
follow the manufacturer's instructions.
Exercise caution when handling process chemicals. Some products may be
corrosive and irritant. The relevant safety codes and safety data sheets
issued by the process chemical manufacturers must be observed. Wear
protective goggles and gloves.
The chemical compartment in the toe-kick of the machine is accessed using
a key. The compartment may only be accessed by authorized personnel.