DITTING KE640 VARIO User manual
Operating Instructions
KE 640
”Grind-on-Demand“
KE 640
KE 640 Vario
Dear customer / service personnel
the ”Single Espresso Grinder KE 640” is a fully automatic espresso cof-
fee grinder of the proven Ditting quality.
We have developed this product with over 80 years of experience in
the manufacture of coffee grinders assuring you of high quality grind-
ing of espresso and other types of coffee beans.
Read through and observe the operating instructions, so you and your
customers will thoroughly enjoy the ”KE 640”. Please store the instruc-
tions in a safe place. If anything is unclear or additional information is
required, please contact your authorized dealer or us as the manufac-
turer. We will be pleased to advise you further. We wish you unlimited
pleasure and success with our product.
Ditting Maschinen AG
Page Page
Table of contents
1. Safety 1
1.1 Symbols 1
1.2 Safety Instructions 1
1.3 Usage Purpose 2
1.4 Personnel Requirements 2
2. Technical Data 2
3. Description 3
4. Safety Devices of the Grinder 4
5. Set-up and Basic Adjustment 4
5.1 Usage Location 4
5.2 Installation 4
5.3 Basic Adjustment 5
6. Operation 5
6.1 Handling the Grinder 5
6.2 Display / Menue 6
6.3 Interruption of grinding 7
7. Operating faults 8
8. Cleaning 9
8.1 Cleaning with GRINDZ™ Grinder Cleaner 9
8.2 Cleaning the Grinder Placement Surface 9
8.3 Cleaning the Grinder Casing 9
8.4 Cleaning of the Grinding Mechanism 9
9. Removal of the Integrated Grinder 10
9.1 Disconnect the main plug 10
9.2 Release the motor’s plug-in connector (1) 10
9.3 Vaccum out the grinder 10
9.4 Component assembly is carried out in reverse order 10
10. Maintenance and Repair 11
10.1 Grinding Disc Replacement 11
10.2 Grinding fineness adjustment with the grinder switched ON 11
11. Spare Parts 12
12. Wiring Diagram 13
12.1 Diagram 100-115V 50/60Hz 13
12.2 Diagram 200-230V 50/60Hz, 240V/50Hz 14
13. Certificate 15
14. Warranty Conditions 15
Page 1
Always remove the electrical plug from the outlet prior to conducting
maintenance or cleaning work on the grinder. Also, prior to removing
the hopper, the plug must be removed from the electrical outlet.
Never operate a grinder with a damaged electrical cord. Inspect the
grinder regularly for damages of the electrical cord, plug, etc.
Any required repairs may only be conducted by authorized service
personnel. For this reason, please contact a customer service repair
facility, your dealer or us directly as the manufacturer.
Do not exceed the maximum allowable continuous grinding time of 20
min. Afterwards, allow the grinder to cool off before the next opera-
tion.
Do not make any modifications or alterations to the grinder. The manu-
facturer assumes absolutely no liability for damages occurring from
failure to observe these instructions.
Children can not appreciate the dangers that can exist in the operation
of electrical grinders. For this reason, never leave children unsuper-
vised with electronic appliances such as this grinder.
Never submerge the grinder in water and never op-
erate with wet hands.
1. Safety
Please read carefully and observe the following
safety instructions. Failure to do so can result in
damage to the grinder and danger to the user.
1.1 Symbols
The following two symbols are used in these operating instructions:
Safety Instruction:
Imminent accident danger if you fail to observe.
General Instruction:
Failure to observe can result in damage to the grind-
er and optimum operation cannot be guaranteed.
1.2 Safety Instructions
Only whole roasted coffee beans may be ground in the KE 640.
When unpacking please inspect whether the power supply (voltage)
complies with the grinder voltage on the manufacturer’s name plate
on the bottom of the grinder. Never operate the grinder in damp or wet
surroundings.
Page 2
2. Technical Data
Type KE 640, KE 640 Vario
Voltage/Frequency 200-230V / 50/60Hz
240V / 50Hz
100-115V / 50/60Hz
Rotation
230-240V 50 Hz 1420 rpm
110-115V 60 Hz 1640 rpm
Sound Emission
Idle Operation 55 dB
Operation 75 dB
Pre-Fuse 16 A-slow
Overload Circuit Breaker
230-240V 4A T
110-115V 7A T
Max. Permissible Running Time S3 20% e.g.(4 sec. on / 16 sec. off)
of the Grinder (6 sec. on; 60 sec. off)*
Dimensions in mm W 240, D 320, H550
Weight 13 kg (28.7 lbs)
Hopper Capacity 1,5 kg (3.3 lbs.)
(Please request technical data for other voltages and frequencies from the manufacturer or dealer.)
1.3 Usage Purpose
Only whole roasted coffee beans may be ground in the KE 640 grinder.
Never use the grinder to grind other products or objects.
1.4 Personnel Requirements
No special requirements are necessary for the users of this grinder. It
is nevertheless a prerequisite that these operating instructions have
been carefully read and understood and that all instructions provided
are observed. In addition, safety-conscious operation is expected.
* only for 115V 60Hz
Page 3
3. Description
Main Components and Operating Elements
The main components and operating elements are pictured in the il-
lustration.
Pos. 1 Hopper with lid
Pos. 2 Lock screw for hopper
Pos. 3 Grinding fineness adjustment*
Pos. 4 Lock screw for grind adjustment lid
Pos. 5 Grind adjustment lid
Pos. 6 Grinding fineness scale
Pos. 7 Display
Pos. 8 Single shot pre-selection button
Pos. 9 Single shot timer
Pos. 10 Double shot pre-selection button
Pos. 11 Double shot timer
Pos. 12 Spout
Pos. 13 Port-a-filter mounting
Pos. 14 Port-a-filter rest
Pos. 15 Fastening screw for Port-a-filter rest
Pos. 16 Start / Stop switch
Pos. 17 Drip tray
Pos. 18 Hopper slide
Pos. 19 Main switch (back)
Pos. 20 Trip switch (back)
Pos. 21 Power cable (back)
* for Vario with adjustment screw on the lid
1
2
3
7
8
12
13
14
17
9
4
5
18
6
10
11
15
19
20
21
16
Page 4
5. Set-up and Basic Adjustment
A grinding test run is carried out on each grinder in our factory. This is
why you may find ground material residue in the grinding
mechanism!
5.1 Usage Location
Place the grinder on a level, vibration-free surface.
Never operate the grinder in moist, or even worse, in
wet surroundings!
5.2 Installation
You have received your grinder in operating condition. Now you only
need to connect it to the main plug. Proceed as follows:
Protect your device with separate pre-fuses (not in-
cluded in the scope of delivery) according to the in-
formation provided under Point 2 “Technical data”.
Make sure that the pre-fuse is not overloaded by
other devices (e.g. fan heaters, deep freezers).
Check whether the main voltage and frequency cor-
respond to the information on the rating plate.
Insert the plug into the corresponding grounded outlet.
4. Safety Devices of the Grinder
Thermal overload circuit breaker
The motor of the grinder is protected by a thermal overload circuit
breaker, which interrupts the motor’s electric circuit in the event of
electric overload. The trip switch, item 20, must be pressed to enable
the grinder to be re-started.
The user has no influence whatsoever on this cir-
cuit breaker. If the circuit breaker trips repeatedly,
an authorised service partner must be consulted, as
the motor’s winding may be damaged.
Page 5
6. Operation
Only use the KE 640 espresso grinder for whole roasted coffee beans.
Observe the safety instructions under 1.2!
The max. permissible operating cycle for 200-230V and 240V is 4 sec.
ON and 16 sec. OFF, i.e. three double shots per minute. For 115V the
max. permissible operating cycle is 6 sec. ON and 60 sec. OFF. Do not
exceed the maximum allowable continuous grinding time of 20 min.
Afterwards, allow the grinder to cool down before the next operation.
6.1 Handling the Grinder
Proper operation necessitates the steps described in the following:
6.1.1 Actuate the main switch on the rear of the grinder.
6.1.2 Open the hopper. Pour whole roasted espresso beans into the
hopper from above. Never pour in coffee powder.
6.1.3 Check whether the hopper slide (item 18) is open.
6.1.4 Adjust the port-a-filter rest (item 14) to your espresso machine’s
port-a-filter. Proceed as follows:
Switch off the KE 640 espresso grinder by using the main switch (item
19). Use the enclosed Allen key to loosen the fastening screws (item
15) slightly and adjust the height of the port-a-filter rest.
5.3 Basic Adjustment
Once the device is ready to operate, a grinding test should be carried
out.
Basic adjustment to a moderately fine setting has been carried out in
the factory using espresso beans. The following markings have been
made on the grinding mechanism (interior):
Red mark 1: Basic adjustment O, finest setting and minimum
grinding disc spacing
Red mark 2: Basic factory setting and also the position for in-
stalling and removing the lid, in order to achieve the
factory setting after positioning the lid.
Never rotate the grinding discs clockwise further
then the red mark 1, as the grinding discs may other-
wise be damaged.
Red mark 1 Red mark 2
Page 6
Slide the port-a-filter between the port-a-filter mounting and the port-
a-filter rest until it comes to a stop.
Push the port-a-filter rest up and tighten the fastening screws. The
setting is correct when the port-a-filter independently remains in the
mounting.
6.1.5 Switch on the grinder and check whether the factory grinding
time settings for single S 2.0 and double D 4.0 appear in the display by
pushing the buttons (Item 8 / 10). If the display corresponds to the fac-
tory settings, continue as described in point 6.1.9; if this is not the case,
the time must be set (see point 6.1.6).
6.1.6 Setting the grinding time (portion quantity). Simultaneously press
both buttons for approx. 3 sec. MENU appears in the display. Scroll to
menu option STI using the single button (Item 8).
6.1.7 Use the Single shot timer, item 9, to set 2.0 sec. Scroll to menu
option DTI using the single button. Use the Double shot timer, item 11,
to set 4.0 sec.
6.1.8 To store these values, press both buttons simultaneously until
SAVE appears in the display.
6.1.9 Adjust the grinding fineness by pulling the sliding detent out to
the front / turn the adjustment screw* and turning the lid / grinding
fineness adjustment to the 2 mark. Note that “0” is the finest setting
and “10” is the coarsest setting.
Rotation to the left = fine
Rotation to the right = coarse
6.1.10 Push your espresso machine’s port-a-filter into the port-a-filter
mounting, item 13, until the grinding process is switched on.
6.1.11 Now brew a test portion of espresso using your machine. If the
result is unsatisfactory, repeat adjustment steps 6.1.6 to 6.1.8 again by
varying the grinding time and grinding fineness. Carry out this process
until the best coffee results have been reached.
6.2 Display / Menue
6.2.1 Calling up the menu
To call up the menu, simultaneously press both buttons for approx. 3
sec. MENU appears in the display. Scroll forward using the single but-
ton. Scroll backwards using the double shot button.
*for KE 640 Vario
Page 7
6.2.2 Grinding time setting
The grinding time range for single cups and double cups should be
set between 0.1 and 10 sec. Scroll to menu option STI (time for single
cups) using the single button. Use the Single shot timer, item 9, to set
the time. Scroll to menu option DTI (time for double cups) using the
single button. Use the Double shot timer, item 11, to set the time.
6.2.3 Quantity indicator
Scroll to menu option S using the single button. The display shows e.g.
S 000020 – You have ground 20 single cup portions. Scroll to menu op-
tion D using the single button. The display shows e.g. D 000018 – You
have ground 18 double cup portions.
6.2.4 Continuous quantity indicator (not resettable)
Scroll to menu option SC using the single button. The display shows
e.g. SC 000127 – You have ground 127 single cup portions altogether.
Scroll to menu option DC using the single button. The display shows
e.g. DC 000120 – You have ground 120 double cup portions.
Press the single button again to scroll forward to set the grinding time
again (see 6.2.2).
6.2.5 Save and exit the menu
To store these values, press both buttons simultaneously until SAVE
appears in the display.
6.2.6 Reset function
If you wish to reset the quantity indicator 6.2.3, switch off the grinder at
the main switch. Press both buttons simultaneously and switch on the
main switch again. The quantity indicator is now set to O.
6.3 Interruption of grinding
If the grinding process is interrupted before the set grinding time has
expired, the LED in the active pre-selection button flashes. The grind-
ing process can be re-started by pushing the port-a-filter back into the
mounting. The missing quantity is ground into the port-a-filter.
If this is not desired push the pre-selection button and the entire set
grinding quantity or grinding time is available once again.
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