Operating instructions
Thermal Disinfector
G 7857
To avoid the risk of accidents or
damage to the machine it is
essential to read these operating instructions
before it is installed, commissioned and used for the
first time.
G i
M.-Nr. 05 439 471
Contents
Description of the machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Guide to the machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Warning and Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Caring for the environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Before using for the first time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Opening and closing the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Water softener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting the water softener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Filling the salt reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Salt indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Loading the machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Loading the machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Adjusting the top basket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Items not suitable for dishwashers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Adding rinsing agent or neutralising agent. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Setting the dosage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Adding cleaning agent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Selecting a programme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Programme chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Switching on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Starting a programme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Changing a programme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Selecting an additional function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Programme sequence indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Switching off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
To cancel a programme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Programming special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Cleaning and care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Correcting minor faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Customer service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Plumbing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
2
Description of the machine
The G 7857 TD is a special freshwater
machine, suitable for use in isolation
ward kitchens, old people’s homes,
care centres, convalescence homes
etc.
A thermal disinfection process is
available for treating potentially
infectious crockery in ward kitchens.
The DESIN Vario TD programme offers
thermal disinfection in accordance with
general hygiene standards, and the
DESIN 93°C/10’ programme meets the
requirements of IfSG on containing the
spread of epidemics.
In Germany, the parameters for
disinfection of a temperature of 93 °C
with a holding time of 10 minutes,
corresponding to effective areas A and
B have been adopted into the official
list for disinfection of instruments in
disinfectors and decontamination units,
according to section 3.2.4. § 18 IfSG by
the Robert Koch Institute (RKI) in Berlin
(German Institute for Infectious
Diseases and Non-communicable
Illnesses).
This machine must not
cleaning or disinfecting products
classed as medical products according
to the MDD directive 93/42/EWG,
Class IIa.
This thermal disinfector is equipped as
standard with a steam condenser (DK)
and water softener.
be used for
The degree of efficiency is defined as
follows:
A = Suitable for the destruction of
vegetative bacteria, including
myco-bacteria, fungi and fungal
spores.
B = Suitable for inactivating viruses
(including HBV and HIV).
3
Guide to the machine
a On/Off button (I-0)
b Door release button
c Display
d Delay start indicator light (see
Programming special functions)
e Drying indicator light
f Programme start indicator light
g Start button
h Drying button
i Button to change between the
current temperature and elapsed
time in the display
j Add neutralising agent indicator light
It is also used as the optical
interface for service technicians
k Add liquid
light (only applies to machine fitted
with an optional external DOS
module)
l Add rinsing agent indicator light
m Add salt indicator light
n Check water inlet/outlet indicator
light
o Programme sequence indicator
lights
p Programme selector
cleaning agent indicator
4
Guide to the machine
a Connection for DOS module
(optional dispenser pump for liquid
cleaning agent) at the rear of the
machine
b Filter combination
c Salt reservoir
(for the water softener)
d Dispenser for powder cleaning agent
e Dispenser for rinsing agent or
neutralising agent (with dosage
selector)
5
Warning and Safety instructions
Please pay attention to the following
This machine complies with all
relevant local and national safety
requirements. Incorrect use can,
however, lead to personal injury and
damage to property.
Read the operating instructions
carefully before starting to use this
machine. This way you will avoid the
risk of accidents and damage to the
machine.
Keep these instructions in a safe
place for reference, and pass them
on to any future user.
notes to avoid injury and damage.
maintained by a Miele authorised and
trained service technician or other
suitably qualified and competent
approved person. Repairs and other
work by unqualified persons could be
dangerous.
explosion or of freezing conditions.
This machine should be
commissioned and then
Do not install the machine in an
area where there is any danger of
Correct use
This machine is designed for
commercial use and for specialised
applications only, as described in these
Operating Instructions. Alterations to the
machine, or using it for purposes other
than those for which it was designed, are
unauthorised and could cause harm. The
manufacturer cannot be held liable for
damage caused by improper or incorrect
use of the machine.
This equipment is not designed for
maritime use or for use in mobile
installations such as caravans, aircraft
etc. However it may be suitable for
such usage subject to a risk
assessment of the installation being
carried out by a suitably qualified
engineer.
The electrical safety of this
machine can only be guaranteed if
connected to a correctly installed
earthing system on site. It is imperative
that this basic safety requirement is
tested regularly and, where there is any
doubt, the electrical wiring system on
site should be inspected by a qualified
electrician.
The manufacturer cannot be held liable
for damage or injury caused by the lack
of or inadequacy of an effective
earthing system (e.g. electric shock).
A damaged machine is dangerous.
Switch off at the mains immediately
and call the Miele Service Department
or an authorised and trained Miele Ser
vice Dealer or other suitably qualified
and competent approved person.
-
6
Warning and Safety instructions
Personnel operating the machine
should be trained regularly.
Untrained personnel must not be
allowed access to the machine or its
controls.
This machine is not a toy! Do not allow
children to play in or around it, or to
operate it. There is a danger they
could injure themselves, or get into the
machine and lock themselves in.
Take great care when handling
liquid agents and additives. These
may contain irritant or corrosive
ingredients. Do not use organic
solvents as these could cause an
explosion.
Follow all relevant safety procedures
carefully. Wear protective gloves and
goggles. With all chemical agents, the
manufacturer’s safety conditions must
be observed.
Avoid inhalation of powder
cleaners. They can cause burning
in the mouth and throat if swallowed,
and can inhibit breathing.
The water in the machine must not
be used as drinking water.
Do not sit or lean on an open door.
The machine could tip up and be
damaged or cause an injury.
Be careful when sorting items with
sharp pointed ends and
positioning them in the machine that
you do not hurt yourself or create a
danger for others. Sharp knives etc.
should be placed in baskets with the
pointed end facing downwards.
When using this machine in the
higher temperature ranges, be
especially careful not to scald or burn
yourself when opening the door.
Baskets and inserts must be allowed to
cool down before they are unloaded.
Any water remaining in containers
could still be very hot. Empty them into
the wash cabinet before taking them
out.
Do not touch the heating elements if
you open the door during or directly
after the end of a programme: you could
burn yourself. They remain hot for some
time after the end of the programme.
Never clean the machine or near
vicinity with a water hose or a high
pressure hose.
Before any maintenance or repair
work is carried out, the machine
must be disconnected from the mains
supply by switching off at the mains
isolator or withdrawing the mains fuse.
The following points should be
observed to assist in maintaining
quality standards, to protect users,
and to avoid damage to the machine
and items being cleaned.
If the machine is being used for
disinfection in accordance with
official regualtions on the control of
epidemics, the steam condenser and
its connections to and from the wash
cabinet must be cleaned and
disinfected whenever any repairs are
carried out or parts replaced.
7
Warning and Safety instructions
When running a disinfecting
programme in accordance with
official regulations on the control of
epidemics, the programme must not be
interrupted once it has been started
(see Cancelling a programme in an
emergency).
The standard of disinfection in the
disinfection programmes must be
routinely confirmed by the user. The
process should be regularly monitored
using thermo-electrical, chemical or
bio-indicators, and this should be fully
documented.
Disinfection programmes must not
be interrupted as this can have a
limiting effect on the disinfection result.
If interruption is unavoidable, however,
the complete programme must be
repeated.
For thermal disinfection, use
temperatures and temperature
holding times to achieve the required
infection prophylaxis in accordance
with current health and safety
regulations.
Only use Miele approved cleaning
agents in this machine. Using
unsuitable cleaning agents could
adversely affect the components of the
machine, as well as items being
cleaned.
For pre-treatment and/or cleaning,
only use low-foaming cleaning and
disinfecting agents which have been
approved by Miele. Foam can have an
adverse effect on the disinfection and
cleaning process.
Where a chemical additive is
recommended on technical
application grounds (e.g. a cleaning
agent), this does not imply that the
manufacturer of the machine accepts
liability for the effect of the chemical on
the items being cleaned.
Please be aware that changes in
formulation, storage conditions etc.
which may not be publicised by the
chemical manufacturer, can have a
negative effect on the cleaning result.
When using cleaning agents and
special application chemicals, it is
essential that the manufacturer’s
instructions are followed. Only use such
chemicals for the purpose and in the
situation specified, to the exclusion of
other chemicals, to avoid such dangers
as chemical reactions and material
damage.
The machine is designed for
operation with water and additive
cleaning agents only. Organic solvents
must not be used in this machine, as
there is the danger under certain
circumstances of fire or explosion.
(Although this is not the case with all
organic solvents, other problems could
arise with their use, for example
damage to rubber and synthetic
materials).
In critical applications where very
stringent requirements have to be
met, it is strongly recommended that all
the relevant factors for the process,
such as cleaning agent, water quality
etc. are discussed with the Miele
Application Technology specialists.
8
Warning and Safety instructions
If cleaning and rinsing results are
subject to particularly stringent
requirements (e.g. chemical analysis,
specialised industrial processes etc.), a
regular quality control test must be
carried out by the user to ensure that
required standards of cleanliness are
being achieved.
The special inserts should only be
used for their specific application.
Hollow instruments must be thoroughly
cleaned, internally and externally.
Empty any containers or utensils
before arranging them in the
machine.
Do not allow any remains of acids
or solvents, and in particular
hydrochloric acid or chloride solutions,
to get into the wash cabinet. Similarly
avoid any materials with a corrosive
effect.
The presence in compounds of any
solvents should be minimal (especially
those in hazard class A1).
To avoid any corrosion damage,
ensure that solutions or steam
containing hydrochloric acid do not
come into contact with the steel outer
casing of the machine.
Using accessories
Only use genuine Miele
accessories with this machine.
Consult Miele on the type and
application of such equipment.
Disposal of your old machine
Before disposing of your old
machine first make it unusable.
Disconnect from the mains, cut off the
cable near the machine and any plug
from the cable.
For environmental and safety reasons
ensure the machine is completely
drained of any residual water and
cleaning agent. (Observe safety
regulations and wear safety goggles
and gloves).
Make the door lock inoperative, so that
children cannot accidentally shut
themselves in. Then make appropriate
arrangements for the safe disposal of
the machine.
The manufacturer cannot be held
liable for damage caused by
non-compliance with these Warning
and Safety instructions.
Please follow the advice on
installation in these instructions
and the separate Installation
Instructions.
9
Caring for the environment
Disposal of the packing
material
The transport and protective packing
has been selected from materials which
are environmentally friendly for disposal
and can normally be recycled.
Ensure that any plastic wrappings,
bags etc. are disposed of safely and
kept out of the reach of babies and
young children. Danger of suffocation.
Rather than just throwing these
materials away, please ensure that they
are recycled.
Disposal of your old appliance
or machine
Electrical and electronic appliances /
machines often contain materials
which, if handled or disposed of
incorrectly, could be potentially
hazardous to human health and to the
environment. They are, however,
essential for the correct functioning of
your appliance or machine. Please do
not therefore dispose of your old
machine or appliance with your
household waste.
Please dispose of it at your local
community waste collection / recycling
centre and ensure that it presents no
danger to children while being stored
for disposal.
10
It should be unplugged or disconnected
from the mains electricity supply by a
competent person. The plug must be
rendered useless and the cable cut off
directly behind it to prevent misuse.
See the "Warning and Safety" section of
this booklet for further details.
Before using for the first time please
pay special attention to the following
points.
Detailed information on these points
can be found in the relevant sections of
these Operating Instructions.
Before using for the first time
Load the machine carefully
Arrange the load so that water will
come into contact with all surfaces.
Concealed surfaces will not be
cleaned.
The spray arms must not be blocked by
any items.
Set the water softener unit
The water softener unit must be set for
the water hardness level in your area.
The salt reservoir also has to be filled,
first with water
reactivation salt.
Filling the salt reservoir with
,
cleaning agent by mistake will cause
serious damage to the water
softener. Please check every time
before refilling that the package
contains reactivation salt.
Add rinsing agent
,
Inadvertently filling the reservoir
for rinsing agent with cleaning agent
(including liquid cleaning agents
and washing up liquid) will cause
serious damage to the reservoir.
Only use designated cleaning agents
for special applications.
and then with
Add cleaning agent
Follow the cleaning agent
manufacturer’s recommendations on
dosage.
The amount required will depend on the
type of cleaning agent and the
programme chosen.
Make sure you read the notes on
dosing given in the programme chart.
Cleaning results may vary from brand
to brand. If you are not satisfied with
the results from one brand, try another
quality brand before contacting Miele
for advice.
The filter combination at the base of
the wash cabinet and the spray arms
must be kept clean.
Regular checking and cleaning is
essential.
Do not use cleaning agents formulated
for use in domestic dishwashers.
11
Opening and closing the door
Electro-thermal door lock
The machine is equipped with an
electro-thermal door lock.
The door can only be opened when:
the electricity supply to the machine
^
is switched on, and
the main switch I-0 is pressed in.
^
To open the door a
Press the door button in as far as it
^
will go, and at the same time, grip the
handle and open the door.
Do not touch the heating
,
elements if you open the door during
or directly after the end of a
programme: you could burn
yourself. The elements remain hot for
some time after the end of the
programme.
With the
programme the door must be kept
closed between batches because of
the build-up in the machine of
condensed water (it could otherwise
cause corrosion or damage to
surrounding furniture. See advice in the
Installation section).
J (SUPER SHORT)
The door locks approx. 1 1/2 mins. after
the programme has started, except in
the D PRE-RINSE and 6 DRAIN
programmes and during the drying
phase (additional programme).
The door remains locked until the end
of the programme, when it can be
opened again.
To cancel a programme
If a programme has to be cancelled in
extreme cases, e.g. when articles in the
machine jostle against each other or
the programme is interrupted with a
fault indication, the door must be
opened (deliberate intervention):
^ Turn the programme selector to the
f position (the programme is
cancelled after approx. 2 secs.).
Important
It is essential to follow procedures,
particularly with regard to regulations
on preventing the spread of epidemics,
as described in Operation - cancelling
a programme.
To close the door
^
Lift the door upwards and push until
it clicks shut. Do not press the door
release button whilst shutting the
door.
12
To open the door with the
emergency release
The emergency release should only be
used when the door cannot be opened
normally, e.g. in the event of a power
failure. Important note for DESIN
programmes
Turn the programme selector to f.
^
Press I-0 to switch the machine off.
^
Opening and closing the door
^
Pull down the emergency release
cord behind the door outer panel.
13
Water softener
The water needs to be softened to
avoid calcium deposits building up on
utensils and in the machine itself.
To ensure a steady supply of soft water,
the water softener unit must always be:
1. correctly programmed and
2. the salt reservoir must be filled.
If the water hardness level is below 4
°d - German scale (0.7 mmol/l), the
reservoir does not need to be filled
with reactivation salt.
The machine is set at the factory for a
water hardness level of 19 °d (3.4
mmol/l).
If the water supply is harder or softer
than this (including below 4 °d or 0.7
mmol/l), the factory setting will need
to be changed following the
instructions in Setting the water
softener. See chart on the next page
for settings.
For future servicing it is useful to make
a note of your water hardness level.
Enter your water hardness level here:
^
°d / mmol/l
Your local water authority will advise
you on the water hardness in your area.
For fluctuating levels e.g. 8 - 17 °d (1.4
- 3.1 mmol/l) set the water softener to
the highest setting. In this example to
17 °d (3.1 mmol/l).
Important
The built-in water softener has settings
from 1 °d - 60 °d (0.2 - 10.8 mmol/l).
14
Table of settings
Water softener
°d
(German
scale)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
mmol/l °f Setting
0.2
0.4
0.5
0.7
0.9
1.1
1.3
1.4
1.6
1.8
2.0
2.2
2.3
2.5
2.7
2.9
3.1
3.2
3.4
3.6
3.8
4.0
4.1
4.3
4.5
4.7
4.9
5.0
5.2
5.4
5.6
5.8
5.9
6.1
6.3
6.5
6.7
6.8
7.0
7.2
7.4
7.6
7.7
7.9
8.1
2
4
5
7
9
11
13
14
16
18
20
22
23
25
27
29
31
32
34
36
38
40
41
43
45
47
49
50
52
54
56
58
59
61
63
65
67
68
70
72
74
76
77
79
81
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 *)
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36 **)
37
38
39
40
41
42
43
44
45
°d /
mmol/l
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
*) factory setting
**) 1-36 only for U.K.
mmol/l °f Setting
8.3
8.5
8.6
8.8
9.0
9.2
9.4
9.5
9.7
9.9
10.1
10.3
10.4
10.6
10.8
83
85
86
88
90
92
94
95
97
99
101
103
104
106
108
Machines without a water softener
are set to 0 at the factory. This
setting of 0 must not
be changed on
these machines.
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
15
Water softener
Setting the water softener
Switch the machine off.
^
Turn the programme selector to the
^
STOP position f.
Press 4 and 6 at the same time,
^
hold them in and, whilst doing so,
switch the machine on with the I-0
button.
The current programme status "P..."
will show in the display.
The indicator light p / 6 will come
on.
Press 3 once. E01 for programming
^
level 1 will appear in the display.
^ Turn the programme selector six
switch positions clockwise (6 o’clock
position).
The number 19 will appear in the
display (the factory water hardness
setting in °d, equivalent to 3.4
mmol/l).
^ Press 4 as many times as is
necessary, or hold it in until the
required value (hardness level in °d)
appears in the display.
Once the number 60 (36 only for
U.K.) has been reached, the counter
will begin again at 0.
^
Press the 6 button. SP appears.
^
Press 6 again. The setting will now
be stored in the memory. The display
clears.
^
The machine is now ready for
operation.
16
Water softener
Filling the salt reservoir
Please only use special coarse grained
reactivation salt
approx. 1-4 mm. Do not use other types
of salt, e.g. table salt, agricultural or
gritting salt. These could contain
components which are insoluble in wa
ter which could result in damage to the
water softener. If in doubt consult your
Miele Professional Department.
The salt reservoir holds approx. 2.5 kg
of salt.
Inadvertently filling the salt
,
reservoir with cleaning agent
damage the water softener.
Before filling the salt reservoir make
sure that you have picked up the
right packet of reactivation salt
^ Remove the bottom basket from the
machine.
^ Unscrew the salt reservoir cap.
with granules of
will
.
Before filling the salt reservoir with
reactivation salt for the first time, fill it
with approx. 2.5 litres of water.
-
^ Place the funnel provided in place.
^ Fill carefully with salt. As it is filled,
displaced water will run out).
^ Wipe any residual salt off the screw
threads on the socket.
^ Screw the cap on firmly.
^
Immediately after this:
PRE-RINSE programme D to remove
any traces of salt from the cabinet.
Important:
PRE-RINSE programme D the machine
does not start for a few minutes this is
not a fault. The water softener is being
reactivated.
If after starting the
Run the
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Water softener
Salt indicator
When the salt reservoir is empty the k
indicator light b comes on to remind
you to fill the reservoir.
Reactivation takes place automatically
during a programme.
The programme sequence indicator
light k a lights up whilst this is
happening.
18