Miele G 7781 DENTAL Operating instructions
Operating instructions for
G 7781 DENTAL
Thermal Disinfector
To prevent accidents and
reduce the risk of damaging
the machine, read these
instructions before installing
or using the machine. M.-Nr. 04 701 092
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Contents
Contents
Guide to the machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Help to protect our environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
IMPORTANT SAFETY INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
IMPORTANT SAFETY INSTRUCTIONS (detachable) . . . . . . . . . . . . Centre pages
Indications for use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the water softener. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Opening and closing the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Loading and unloading the machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Adding rinsing agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Setting the dosage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Adding neutralizing agent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Adding detergent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Program Chart G7781 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Turning the machine on and off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Selecting a program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Selecting an additional program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Program sequence indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Interrupting a program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Programming special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Reactivating the water softener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cleaning an care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Correcting minor problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Electrical connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Plumbing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2
Guide to the machine
Guide to the machine
1 ”Check water inlet/drain”
indicator light
2 ”Reactivate water softener”
indicator light
3 ”Add
liquid detergent”
indicator light
(only where special DOS module is
connected externally)
4 ”Add neutralizing agent”
indicator light
5 Program sequence indicator light
6 Indicator display field
7 Door release
8 On-Off button
9 Program selectors
3
Guide to the machine
10 11 12 13 14 15
10 Connection for despenser pump
DOS C 60 (rear)
11 Filter combination
12 Dispenser for
13 Salt reservoir (water softener)
4
powder detergent
14 Dispenser for
with dosage selector
15 Rinsing agent level indicator
liquid rinsing agent
Help to protect our environment
Help to protect our environment
Disposal of the packaging material
The transport and protective packaging is mostly manufactured from the
following reusable materials:
corrugated paper/cardboard
polystyrene (CFC-free)
polyethylene foil (transparent)
untreated wood
Rather than throwing these materials
away, please take them to the nearest
recyclables collection point.
Disposal of your old machine
Old machines contain materials which
can be recycled. Please contact your
local scrap merchant about potential recycling options before disposal.
When disposing of an old machine,
make sure the door catch is removed.
This will prevent children at play from
being accidentally locked in.
5
IMPORTANT SAFETY INSTRUCTIONS
IMPORTANT SAFETY INSTRUCTIONS
When using an electrical appliance, basic precautions should always be followed
including the following:
READ ALL INSTRUCTIONS BEFORE
USING THE APPLIANCE
WARNING –
The manufacturer cannot accept
responsibility for damage caused
when the appliance is not used
according to the instructions, or for
uses other than those for which it
was intended.
This special commercial machine
is suitable for the applications mentioned in the operating instructions. Do
not use for purposes other than those
for which it was designed, as these
may be dangerous. The manufacturer
cannot be held responsible for damage
caused by improper use.
Do not allow small children or un-
authorized personnel access to
the machine or its controls.
If thermal disinfection is required
(93ºC/200ºF/10min.), the process
needs to be checked and documented
regularly. This can be done by checking the disinfection control diode on the
machine. Alternatively, a chemical indicator may be used (e.g. the Disinfection Control Tubes by A. Browne Ltd.,
supplied by Miele). These disinfection
control tubes should be placed in the
filter combination. After the disinfection
cycle, they may be inspected by removing the coarse filter.
The disinfection program should
not be interrupted, as this would
affect the disinfection result. If interruption is necessary, the program should
be repeated.
Do not install the machine in areas
where there is a risk of explosion.
6
IMPORTANT SAFETY INSTRUCTIONS
The machine is built in accordance
with current safety requirements.
Any repair work should only be carried
out by a suitably qualified and competent engineer. Repairs by unqualified
persons could be dangerous.
The electrical safety of this ma-
chine can only be guaranteed if
connected to an electrical system that
complies with all local and national
regulations. It should be checked by an
expert if necessary. The manufacturer
cannot be held responsible for damage
caused by incorrect wiring.
The machine should only be in-
stalled by a suitably qualified and
competent contractor. Before connecting the machine, the installer should
check that the voltage and frequency
of the electrical supply correspond with
the details on the data plate of the machine.
Only genuine Miele parts or acces-
sories should be used with the
G 7781 Dental Thermal Disinfector. The
performance and safety of non-genuine
parts or accessories cannot be guaranteed, and use of such parts or items
may void the machine warranty. If you
have specific questions about machine
options or accessories, please call
Miele.
The use of Neodisher cleaning,
neutralizing, and rinsing agents is
strongly recommended. The use of any
other products may invalidate the disinfection results and the manufacturer’s
warranty.
The machine is completely isolated
from the electricity supply only
when it is unplugged or the circuit
breaker is turned off. This must be
done before any repair work is carried
out.
The water in this machine must not
be used as drinking water.
Only use detergents which have
been approved of by Miele. Do not
use solvents in your machine as there
may be a danger of explosion.
7
IMPORTANT SAFETY INSTRUCTIONS
Take care when handling liquids
such as detergents, rinsing or neutralizing agents. These may contain
acids or alkalis. Follow the instructions
and safety procedures on the packaging carefully and wear protective
gloves and goggles. Read the Material
Safety Data Sheets.
Avoid inhalation of powder
cleaners.
Empty any containers or glassware
before placing it in the machine.
Do not allow any acids or solvents,
especially hydrochloric acid and
chlorides, to get into the wash cabinet.
Be careful when sorting instru-
ments with sharp pointed ends. If
possible, place the pointed end downwards.
Install special inserts in accord-
ance with the instructions provided.
When using the machine be care-
ful not to scald or burn yourself.
Baskets and inserts must first be
allowed to cool down. Any water which
may have collected in incorrectly
loaded items will be very hot and
should be emptied into the wash
cabinet.
Do not touch the heating elements
after the end of a program. You
could burn yourself.
Do not hose the machine down to
clean it.
Do not sit or lean on the open door.
This could cause the machine to
tip and be damaged.
When disposing of an old ma-
chine, make sure the door catch is
removed. This will prevent children at
play from being accidentally locked in.
8
IMPORTANT SAFETY INSTRUCTIONS
All relevant safety procedures
should be obeyed. Relevant safety
procedures include, but are not limited
to, the Centers for Disease Control’s
Recommended Infection Control Practices for Dentistry and the OSHA Bloodborne Pathogens Standard.
The manufacturer cannot be held
responsible for damage caused by
failure to heed the warning and
safety instructions.
SAVE THESE
INSTRUCTIONS
9
Indications for use
Indications for use
High-level disinfection
The G 7781 Dental Thermal Disinfector
is suitable for automatic treatment of
dental instruments and accessories. It
cleans and when using the disinfection
programs simultaneously thermally disinfects at 200ºF/93ºC instruments and
accessories.
Areas of effectiveness are physical
removal or thermal inactivation of vegetative bacteria including mycobacteria,
fungi, fungal spores, and viruses.
These categories include the Mycobacterium tuberculosis and the Enterococcus faecium.
Important: Only the programs labeled
‘DISINFECTION’ disinfect! Only use
these programs when handling contaminated items. All other programs are
designed to clean items without disinfecting them!
All relevant safety procedures should
be obeyed. Relevant safety procedures
include, but are not limited to, the
Centers for Disease Control’s Recommended Infection Control Practices for
Dentistry and the OSHA Bloodborne
Pathogens Standard.
The G 7781 Dental Thermal Disinfector
achieves high-level disinfection as
defined by the Spaulding categorization.
The Spaulding category high-level disinfection is the same type of means as
in the sterilant category except that the
use pattern is different. The sterilant is
used as a high-level disinfectant by
e.g. reducing the exposure time within
its effective range of tuberculocidal,
virucidal, and bactericidal action.
According to the Centers for Disease
Control’s Recommended Infection
Control Practices for Dentistry,
instruments should be classified in one
of the following categories and be
treated accordingly:
All critical instruments must be sterilized after treatment in the G 7781
Dental Thermal Disinfector. Critical instruments are used to penetrate soft
tissue or bone, e.g. forceps, scalpels,
bone chisels, scalers, or burs.
Semicritical instruments should be
sterilized after treatment in the G 7781
Dental Thermal Disinfector. If, however,
sterilization is not feasible because the
instrument will be damaged by higher
heat exposure, the instruments may be
treated terminally in the G 7781 Dental
Thermal Disinfector. Semicritical instruments do not penetrate soft tissues or
bone but contact oral tissues, e.g. mirrors and amalgam placement instruments.
Noncritical instruments may be
treated terminally in the G 7781 Dental
Thermal Disinfector. Noncritical instruments or devices come into contact
only with intact skin, e.g. external components of x-ray heads.
10
Indications for use
Instruments suitable for
processing in the thermal
disinfector
All instruments, accessories, and other
items to be cleaned and disinfected in
the G 7781 Dental Thermal Disinfector
should have the following properties:
heat resistance to a temperature of
up to 95°C/203°F
corrosion resistance in the presence
of heat and alkalinity.
The high heat retention capacity of
stainless steel allows for fast drying.
Plastic has a lower heat retention capacity, thus needing a longer drying
time. In this case, a slightly extended
waiting period after the disinfection
cycle of 5 - 15 min. may be necessary.
Aluminum discolors using the program
DISINFECTION 93°C-10’. It may discolor using the program DISINFECTION VARIO 93°C-10’. Aluminum only
has a limited suitability for processing
in this system.
Do not clean fiberoptics or electrical
equipment or components in the thermal disinfector.
Rhodium coated specula must be arranged so that their surfaces do not suffer any mechanical damage. Not all
specula with glass are suitable for machine treatment.
In case you have any questions regarding the suitability of instruments for
being processed in the G 7781 Dental
Thermal Disinfector, please ask the instrument manufacturer’s advise.
Cleaning without disinfection
All other programs are designed to
clean goods without disinfecting them.
These programs are:
Rinse
Wash 93°C
Please refer to ”Program selection” for
detailed information.
Carbon steel may corrode in the process. Please try the corrosion resistance of carbon steel instruments with
initially one instrument, or do not process carbon steel items at all. If you do
process carbon steel items, the program DISINFECTION VARIO 93°C-10’
should be used.
Handpieces, drill bits, grinders, root
canal instruments or other rotating instruments only have a limited suitability
for the thermal disinfector. Please ask
the manufacturer’s advice on the suitability for processing in this system.
11
Setting the water softener
Setting the water softener
To avoid the build-up of calcium deposits on items being cleaned and in
the machine, the water may need to be
softened (where the supply hardness
exceeds 107 ppm CaCO
To ensure a steady supply of soft water
the water softener must always be:
1. correctly set
2. regenerated with salt as soon as the
”Reactivation” indicator light comes on.
The water softener should be set to
correspond with the water hardness
upon installation of the machine.
Your local water authority can advise
you on the water hardness in your area.
Setting the water softener
The hardness range is divided into 18
units and a zero position. The machine
is set at the factory for a water hardness setting of 8, corresponding to 339
ppm CaCO
der or softer than this, the setting of the
controls should be changed. Find the
”Display Field” number corresponding
to your local water hardness in the
table.
. If your water supply is har-
3
).
3
Dis-
gr/gal mmol/l ° fH °eH ppm
play
Field
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
6
7
8
9
10
11
12
13
15
17
19
22
24
28
32
38
48
71
1.07
1.25
1.42
1.60
1.78
1.96
2.14
2.31
2.67
3.03
3.38
3.92
4.27
4.98
5.70
6.76
8.54
12.64
10.7
12.5
14.3
16.0
17.9
19.6
21.4
23.2
26.8
30.4
33.9
39.3
42.8
50.0
57.1
67.8
85.7
126.7
7.5
8.8
10.0
11.3
12.5
13.8
15.0
16.3
18.8
21.3
23.8
27.5
30.0
35.0
40.0
47.6
60.1
88.9
CaCO
107
125
143
160
179
196
214
232
268
304
339
393
428
500
571
678
857
1267
Press the ”Drain” and ”Drying” touch
pads simultaneously and, while depressed, turn the machine on, using
the main ”On/Off” switch.
”P…” will appear in the indicator
panel.
Press the ”Reactivation” touch pad.
The ”P…” will disappear and setting
”0” will appear in the display field.
This setting ”0” can now be changed
if necessary. To do this:
Press the ”DRYING” touch pad as
many times as necessary for the
desired value to appear in the display field.
Press the ”START” touch ad. ”SP” appears in the display field.
Press ”START” once more. The setting will now be stored. The display
field clears.
The machine is now ready for operation.
3
12
If the water hardness in your area is
permanently below 107 ppm CaCO
you do not need to soften the water.
Please deactivate the water softener by:
Selecting the setting ”0” in the display field according to above instructions. The ”REACTIVATION” control
light will not come on and the water
softener will not need to be reactivated.
For instructions on reactivating the
water softener, see page 30.
,
3
Setting the water softener
13
Opening and closing the door
Opening and closing the door
To open the door
press the ”DOOR” button on the control panel and open the door.
The door should only be opened during operation for emergencies, e.g. if
articles are knocking together. If this occurs in the disinfection program, restart
the complete program.
To close the door
lift the door upwards and push until it
clicks into position. Do not press the
”DOOR” button.
14
Loading and unloading the machine
Loading and unloading the machine
The disinfector normally uses an upper
and a lower basket.
Depending on the type and shape of
the items being cleaned, inserts can be
supplied.
The diversity of the inserts is so great
that it is not possible to illustrate them
all or give detailed instructions on their
use here.
E.g. the thermal disinfector will allow
hollow instruments to be internally
cleaned and disinfected using the
upper basket O 177.
Removing excess soils
Empty all items to be cleaned before
loading into the machine.
Ensure that no acid or solvent
residues, especially hydrochloric
acid or chlorides, get into the wash
cabinet.
Notes
Load the items to be cleaned so the
water will come into contact with all
surfaces. This ensures that they will
be properly cleaned and disinfected.
Hand instruments should be processed in cassettes like the
E 146, E 363, or E 373.
Hinged instruments should be
placed into the universal mesh tray E
378 or E 379 with the hinge opened
at an angle of about 90° (right angle).
Hollow instruments should be
treated in the upper basket O 177,
and be positioned on jets or funnels.
Do not place items to be cleaned inside other pieces where they may be
concealed.
Vessels should be inverted and
placed in the correct inserts.
Deep based items should be placed
at enough of an angle for water to
run off them freely.
Tall and narrow pieces should be
placed in the center of the basket to
ensure good coverage with water.
Hollow instruments may only be processed correctly, i.e. cleaned and
disinfected inside and outside, in the
appropriate upper basket O 177.
The spray arms must not be blocked
by items which are too high for the
basket or which hang down in its
path. If necessary, manually rotate
the arm to test it.
The flap of the powder detergent dispenser on the door must not be obstructed and be prevented from
opening when the door is closed.
In order to avoid corrosion, it is recommended that only heat and corrosion resistant items be cleaned in
the machine. For the suitability of
instruments, please refer to ”Indications for use”.
Care should be taken that as little
dental cement or amalgam remains
on the instruments as possible. However, where necessary, the instruments can be cleaned manually after
thermal disinfection (following health
and safety regulations) with minimized danger of infection.
15
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