Miele G7859 User Manual
Operating instructions
Commercial Dishwasher
G 7859
It is essential to read these
operating instructions before
installing, commissioning or
using the machine, to avoid
the risk of accident or damage M.-Nr. 05 339 030
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Contents
Contents
Description of the machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Guide to the machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Warning and safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Warning and Safety instructions (detachable). . . . . . . . . . . . . . . . . Centre pages
Caring for the environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Before using for the first time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Opening and closing the door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Water softener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Setting the water softener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Filling the salt reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Salt indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Loading the machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Adjusting the upper basket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Items not suitable for dishwashers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Adding rinse aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setting the dosage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Adding cleaning agent. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Programme selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Programme chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Switching the machine on and off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Switching on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Switching off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cancelling a programme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Programming special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Cleaning and care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Correcting minor faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
After Sales Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Plumbing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2
Description of the machine
This Miele machine is a frontloading
commercial dishwasher, with very short
batch times especially suitable for use
in restaurants, cafés, fast food outlets,
boarding houses, etc.
It operates on the freshwater system
and is equipped with a water softener
and electro-thermal door lock as standard.
Optional extra
Steam condenser (DK)
Description of the machine
3
Guide to the machine
Guide to the machine
1 On/Off button (I-0)
2 Door release
3 Display field
4 “Delay start” indicator light
(see “Programming special
functions”)
5 “Drying” indicator light
6 “Programme start” indicator light
7 Start button
8 Drying button
9 Switch to change display from
“Actual temperature” to “Elapsed
programme time”
10 Optical interface
(for service technician)
11 “Add
12 “Add rinse aid” indicator light
13 “Reactivate water softener”
14 “Check water inlet/outlet”
15 Programme sequence indicators
16 Programme selector
(liquid) detergent”
indicator light
(only where special DOS module is
connected externally)
indicator light
indicator light
4
Guide to the machine
17 Connection for DOS dispenser
module at the rear
(Dispenser pump for liquid
detergent)
18 Filter combination
19 Salt reservoir
(Water softener)
20 Dispenser for powder
detergent
21 Dispenser for rinse aid
(with dosage selector)
5
Warning and safety instructions
Warning and safety instructions
This machine conforms to current
safety requirements. Inappropriate
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, and make them available to
future users.
Appropriate usage
This machine is designed for com-
mercial use and for specialised
applications only, as described in
these Operating Instructions. Using it
for purposes other than those for which
it was designed would be unauthorised
and could cause harm.
The manufacturer cannot be held responsible for damage caused by improper use.
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 be a suitably qualified engineer.
where there is a danger of explo-
sion or of freezing conditions.
The electrical safety of this ma-
chine can only be guaranteed
when continuity is complete between
the machine and an effective earthing
system on site. It is imperative that this
basic safety requirement is tested and,
where there is any doubt, the electrical
system checked out by a qualified electrician.
The manufacturer cannot be held responsible for damage or injury caused
by missing or defective earthing, such
as electric shock.
A damaged machine is dan-
gerous. Switch off at the mains immediately and call the Miele Service Department or an authorised and trained
Miele Service Dealer or other suitably
qualified and competent person.
Repair work may only be carried
out by an authorised Miele service
technician or other suitably qualified
and competent person. Repairs by unqualified persons could be dangerous.
Personnel operating the machine
should be trained regularly. Children and untrained personnel should not
be allowed access to the machine or
its controls.
The following notes are to help avoid
personal injury
The machine should be commis-
sioned and then maintained only by
a Miele authorised and trained service
technician or other suitably qualified and
competent persons.
Do not install the machine in an area
6
Do not allow children to play in or
around the dishwasher, or to operate it. There is a danger they could get
into the machine and lock themselves
in.
Warning and safety instructions
Take care when handling liquid
agents/additives. These may contain irritant or corrosive ingredients. On
no account use any organic solvent, as
there may be the danger of an explosion occuring.
Follow the instructions and relevant
safety procedures carefully. Wear protective gloves and goggles. With all
chemical agents the manufacturer’s
safety instructions must be observed.
Avoid inhalation of powder deter-
gents.
They can cause burning in the mouth
and throat if swallowed, or inhibit breathing.
The water in the machine must not
be used as drinking water.
Do not sit or lean on the open
door. This could cause the machine to tip and be damaged.
Be careful when sorting sharp-
pointed items. You may prefer to
place cutlery with sharp points with the
handles upwards to avoid possible injury.
When using this machine in the
higher temperature ranges be
especially careful not to scald or burn
yourself. Baskets and inserts must first
cool down. Any water which may remain in containers will be very hot and
must be emptied into the wash cabinet.
Do not touch the heating elements
during or directly after the end of a
programme, you could burn yourself.
They remain hot for a while after the end of
a programme.
Never clean the machine or close
vicinity with a water hose or a high
pressure hose.
Before any maintenance or repair
work is undertaken, the machine
must be disconnected from the mains
supply by switching off at the mains isolator or switching off the mains fuse.
The following notes should help to
avoid material damage.
Only use detergents formulated for
special processes and
approved by Miele for use with this
machine. Use of unsuitable detergents
could adversely affect the components
of the machine as well as items being
cleaned.
For pre-treatment and / or cleaning
only use low-foaming detergents
and disinfecting agents which have
been approved by Miele. Foam can
have an adverse effect on the disinfection and cleaning process.
7
Warning and safety instructions
Where a chemical additive is re-
commended on technical grounds
(e.g. with a cleaning agent), this does
not imply that the manufacturer of the
machine takes responsibility for the
compatibility with the items being
cleaned.
Please be aware that changes in formulation, storage conditions etc., which
may not be publicised by the chemical
producer, can have a negative effect
on the cleaning result.
When using cleaning agents and
specialised products, it is essential
that the manufacturer’s instructions are
followed. Only use the product for the
application described by the manufacturer, to avoid any material damage or
the occurrence of strong chemical reactions.
The machine is designed only for
operation with water and cleaning
agents. Organic solvents must not be
used in the machine, as there is the
danger under certain circumstances of
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, quality of
water, etc. are discussed with the Miele
Application Technology specialists.
If the cleaning result is subject to
particularly stringent requirements
(e.g. chemical analysis, specialised
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.
Empty any containers or utensils be-
fore arranging them in the machine.
Do not allow any remains of acids
or solvents, and in particular hydrochloric acid or chloride solutions to access 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).
Ensure that solutions or steam con-
taining acid salts do not come into
contact with the steel outer casing of
the machine, to avoid any corrosion
damage.
Please follow the advice on installa-
tion in these instructions and in the
separate Installation Instructions.
In countries where there are areas
which may be subject to infestation by cockroaches or other vermin,
pay particular attention to keeping the
appliance and its surroundings in a
clean condition at all times. Any damage which may be caused by cockroaches or other vermin will not be
covered by the appliance guarantee.
8
Warning and safety instructions
Use of accessories
Only specific additional equip-
ment, made by Miele should be
connected to this machine. Consult
Miele on the type and application of
such equipment.
Disposal of the old machine
When disposing of your old ma-
chine first make it unusable. Disconnect from the mains power supply,
cut off the cable and any plug from the
cable.
For environmental and safety reasons,
ensure the machine is completely
drained of any residue 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. Make appropriate arrangements for the safe disposal of the machine.
For tank system machines ensure that
any water is emptied out of the tank.
The manufacturer cannot be held
responsible for any damage caused
through non-observance of these
Warning and Safety instructions.
9
Caring for the environment
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.
Rather than just throwing these materials
away, please ensure they are offered for
recycling.
Disposal of your old machine/appliance
Old machines/appliances contain
materials which can be reclaimed or
recycled. Please contact your dealer,
your waste collection centre or scrap
merchant about potential recycling
schemes.
Ensure that the machine/appliance
presents no danger to children while
being stored for disposal.
See the appropriate section in the
Warning and Safety instructions.
10
Before using for the first time
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 section of
the Operating Instructions.
Before using for the first time
Loading the crockery correctly.
Arrange the load so that water will
come into contact with all the surfaces.
This ensures that they will be properly
cleaned.
The spray arms must not be blocked
by any items.
Setting the water softener.
The water softener unit must be set to
deal with the water hardness level in
your area.
The salt reservoir must also
filled with water and then with dishwasher reactivation salt.
Important
Filling the salt reservoir with detergent
by mistake will cause serious damage
to the water softener.
Please check every time before refilling
that the package contains dishwasher
reactivation salt.
Adding rinse aid.
Inadvertently filling the reservoir for
rinse aid with powder or liquid detergent, or washing up liquid, will cause
serious damage to the reservoir.
Only use designated cleaning agents
for special applications.
Do not use detergents formulated for
use in domestic dishwashers.
first be
Adding the correct amount of cleaning agent.
Follow the detergent manufacturer’s
recommendations. Using less than advised can adversely affect cleaning results.
The amount dispensed will depend on
the type of detergent used and the programme selected.
Read the notes on dosage 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 the
Customer Service Department for
advice.
The filter combination in the base of
the wash cabinet and the spray arms
must be kept clean.
Regular checking and cleaning are
essential.
11
Opening and closing the door
Opening and closing the door
Electric door lock
The machine is equipped with an electric door lock.
The door can only be opened when:
the machine is connected electrically
the main switch I-0 is on.
To open the door a
Press the door button in fully and at
the same time pull open the door.
Do not touch the heating elements if
you open the door during or directly
after the end of a programme. The
heating elements remain hot for
some time after the end of a programme.
To close the door
Lift the door upwards until it clicks
into position. Do not push in the door
release button as you do so.
Cancelling 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):
Important: Further procedures are described in the section “Switching on and
off” under “Cancelling a programme”.
Opening the door with the
emergency release
The emergency release should only be
used when the door cannot be opened
normally (e.g. power failure).
Turn the programme selector switch
to f (the programme is cancelled
after approx. 2 secs.).
Turn the programme selector switch
to f.
The door is locked approx. 1.5 mins.
after programme start, except in the
programmes D (COLD), 6 (DRAIN)
and during the drying phase (additional
programme).
The door remains locked until the end
of the programme, when it can be opened again.
12
Switch off the machine (I-0 switch).
Pull down the emergency release behind the door outer panel.
Water softener
Water softener
To avoid the build-up of calcium deposits on items being cleaned and in
the machine the water needs to be softened.
To ensure a steady supply of soft water
the water softener unit must always be:
1. correctly set (programmed) and
2. the salt reservoir must be filled.
(If the water hardness level is below
70 mg/l (4°d) the water does not
need to be softened.)
The machine is set at the factory for a
water hardness level of 340 mg/l
(19 °d).
If the water supply is harder or softer
than this (including below 70 mg/l or
4°d) the factory setting will need to
be changed following the instructions in the section “Setting the
water softener”. For settings, see
chart on the next page.
For future servicing it is useful to make
a note of your water hardness level.
Enter details of your water hardness
level here:
°d / mg/l
Your local water authority will advise
you on the water hardness in your area.
For fluctuating levels (e.g. 140 - 310 mg/l
or 8 - 17°d) set the water softener to
the highest setting (in this example to
310 mg/l or 17°d).
Important
The built-in water softener has settings
from 20 mg/l to 1080 mg/l or 1°d - 60°d.
13
Water softener
Table of settings
°dmg/l°f Setting
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
2
4
5
7
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
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
20
40
50
70
90
110
130
140
160
180
200
220
230
250
270
290
310
320
340
360
380
400
410
430
450
470
490
500
520
540
560
580
590
610
630
650
670
680
700
720
740
760
770
790
810
°dmg/l°f Setting
1
2
3
4
5
6
7
8
9
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
*) factory setting
830
850
860
880
900
920
940
950
970
990
1010
1030
1040
1060
1080
83
85
86
88
90
92
94
95
97
99
101
103
104
106
108
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
Machines without a water softener
are set to “0” at the factory. This setting of “0”
must not be changed on
these machines.
14
Setting the water softener
Switch the machine off.
Turn the programme selector to f
“STOP”.
Press 4 and 6 at the same time,
hold them in and whilst doing so
switch on the machine with the I-0
main switch.
The actual programme status “P...”
appears in the display.
The p / 6 indicator light illuminates.
Press 3 once. “E01” (programme
level 1) appears in the
display.
Turn the programme selector six
switch positions to the right (6 o’clock
position).
The number “19” appears in the dis-
play (the factory water hardness setting in °d, equivalent to 340 mg/l).
Water softener
Press 4 as many times as is
necessary, or hold it in until the required water hardness level appears
in the display.
The counter returns to “0” after
reaching “60”.
Press 6. “SP” is displayed.
Press 6 once more. The setting will
now be saved. The display clears.
The machine is now ready for
operation.
15
Water softener
Filling the salt reservoir
Please only use specialised reactivation salt, if possible coarse grained
activation salt, with granules of approximately 1- 4 mm. Under no circumstances
must other salts be used, e.g. table salt,
or gritting salt. These could contain
components which are insoluble in
water which could result in damage to
the water softener.
The salt reservoir holds about 2.5 kg of
salt.
Inadvertently filling the salt reservoir
with
dishwasher detergent always
causes serious
water softener.
Make sure that you have picked up
the right packet of
before filling the salt reservoir.
Remove the bottom basket.
Unscrew the salt reservoir cap.
damage to the
reactivation salt
re-
Before filling the salt reservoir with
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).
Clean salt from the screw threads of
the socket.
Screw the cap on firmly.
16
Run the “COLD” programme D im-
mediately to remove any traces of
salt water from the cabinet.
Important:
If, after switching on, the D (COLD)
programme start is delayed for a few
minutes this is not a fault. The water softener is being reactivated.
Salt indicator
When the salt reservoir is empty the k
indicator light c comes on. The reservoir should be refilled with dishwasher
salt for reactivation.
The reactivation programme runs automatically during a programme.
The indicator light k b on the pro-
gramme sequence display lights up
during this process.
Water softener
17
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