WMF 9420 series User manual

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WMF COFFEE MACHINES
Operating instructions
WMF Chocolate Dispenser
Series
9410/9420
Edition 6 - Stand 03.08
Item-No.
33 2000 0000

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Congratulations on the purchase of your
WMF chocolate dispenser.
You will happy with its advanced technology,
long service life, economical price.
You will get the most out of your
WMF chocolate dispenser by reading through
this Operator’s Manual.
In your own interest, please follow all
safety and cautionary instructions and pay
attention to the warning labels placed on
the machine. This will help to avoid
accidents and technical malfunctions.
Never entrust the machine to anyone who
is not familiar with the operating
instructions.
Keep these operating instructions near the
machine. This will allow your operating
personnel easy access to information at any
time, and will enable them to take the
appropriate action should there be any
technical malfunctions.

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TABLE OF CONTENTS
1Machine features and components...................................................................................................28
2General description ...........................................................................................................................29
3Warnings ............................................................................................................................................29
4Safety instructions .............................................................................................................................30
5Technical data....................................................................................................................................31
6Conditions for installation and operation .......................................................................................32
7Operation............................................................................................................................................33
7.1 Starting the machine.....................................................................................................................33
7.2 Beverage preparation ...................................................................................................................34
7.3 Displaying quantities....................................................................................................................36
7.4 Waiter accounting system (optional) ...........................................................................................36
7.5 Switching the machine off ...........................................................................................................37
8Settings................................................................................................................................................37
8.1 Setting the dispensing quantities..................................................................................................37
9Care of the machine...........................................................................................................................38
9.1 Daily cleaning ..............................................................................................................................38
9.2 Weekly cleaning...........................................................................................................................40
9.3 General cleaning ..........................................................................................................................41
10 Error messages and displays ............................................................................................................42
11 WMF Customer-Service ...................................................................................................................42
12 Warranty claims ................................................................................................................................43

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9
12
8
1
2
3
4
5
13
10
11
8
6
7

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1Machine features and components
1 Reservoir
2 Display
3 Waiter lock (optional)
4 Setting buttons (- / +)
5 Product buttons
6 Beverage outlet
7 Drip tray
8 Front door
9 Outlet cap
10 Rinse button
11 Mixing beaker
12 Door lock (optional)
13 ”On/Off“ switch

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2General description
The WMF Chocolate dispenser for straightforward fully automatic preparation of hot drinking
chocolate is the ideal accessory for the coffee machines WMF Bistro or WMF Cafemat even for
self service operation. At the push of a button a cup or a mug of hot chocolate will be dispensed.
3Warnings
Greatest possible safety is one of the features of WMF products to which we pay very particular
attention.
Despite every safety precaution being taken in its design, there is a potential for danger in every
machine if it is not used properly.
For this reason, and the interest of your safety, we have summarized the following hazard
warnings, and have highlighted them in grey with a background.
Please also observe the “Safety instructions” on page 30.
For your own safety,
please observe the
following instructions
Connection of the machine and starting up for the first
time must only be carried out by WMF customer service
technicians.
at all times: All maintenance and repair work must only be carried
out by WMF customer service technicians or
authorized persons.
Only original parts should be used.
In no circumstances should any alteration be made to
the built-in safety devices.
Caution! Risk of scalding!
There is a risk of scalding in the beverage outlet area 6.
Caution! Risk of crushing!
Never reach into the reservoir 1when the machine is
switched on. Close the front door 8 with care.
Caution! Risk of injury!
Only operate the machine with the beverage outlet 6and
the reservoir 1in place. Before dismantling, switch the
machine off with the “On/Off” switch 13.

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4Safety instructions
General Directions
1. Always ensure that the water tap is turned off when the machine is no longer in use and that the
master switch outside the machine is switched off and /or the machine unplugged from the
mains supply.
2. The built-in type-tested safety mechanism prevent any impermissible increase in pressure and
temperature in the water boiler. The machine must be switched off immediately if the relief
valve is tripped. Contact the WMF customer service department and do not switch the machine
on again until the fault has been remedied.
3. Do not use the machine outdoors.
4. The machine must never be hosed down with a jet of water or steam. The surface may be
cleaned with a damp cloth or one of the products from the range of WMF care products.
Shutdown
1. The machine should be cleaned before it is taken out of service for a longer period of time. It is
essential that the machine be drained in order to prevent frost damage if there is any risk of
freezing temperatures. The WMF customer department should be contacted in good time in
such cases.
2. After a shutdown of several weeks, we recommend running the automatic cleaning cycle at
least twice before start-up of the unit.
Regulations
See rating plate for water boiler data. The built-in water boiler is constructed and equipped in
accordance with DIN 4753/1. It is not notifiable and does not require a licence. The device meets
all the relevant requirements.
The Ordinance and the associated technical regulations specify that the operator of such
equipment is responsible for due maintenance and verification of the safety mechanism.
The operator is obliged to ensure that electrical plant and equipment is tested to establish that it is
in good working.
Preventive measures for subsequent damages
Any technical devices, particularly large fully automatic machines, are a potential source of
danger when operated without supervision.
We therefore recommend that the operator takes appropriate action to prevent damage, for
instance installing a suitable water detector in the site water supply line.
If the local water has a carbonate hardness of more than 5° (German hardness), a WMF water
filter must be installed in the supply line to the machine.
Regular maintenance by WMF Customer Service at least once a year.

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This device is subject of the directive on waste electrical and electronic equipment
(WEEE/EU directive) and may not be disposed of as domestic waste.
5Technical data
Rated power*2.2 kW
Capacity per hour** 140 cups
Hot water capacity, total approx. 17 l/h (4.5 gallons/h)
Reservoir for powdered drinking chocolate approx. 2 kg (2.4 pound)
Mains supply*1/N/PE ~ 50 / 60 Hz 230 V
External dimensions:
Width (without sales fittings)
Width (with sales fittings)
Height
Depth
240 mm (9.45 inches)
430 mm (16.93 inches)
721 mm (28.39 inches)
465 mm (18.31 inches)
Weight when empty approx. 22 kg (48.5 pounds)
Continuous sound pressure level (Lpa)*** < 70 dB (A)
Subject to technical change without notice.
* See rating plate for special versions. The figures quoted refer to the basic version.
** The hourly outputs indicated are GUIDELINES and depend, among other things, on the quantity of ground
coffee, type of coffee, fineness, brewing temperature, brewing aperture size, brewing pressure, water hardness and
general condition of the machine (e.g. limescale, connections, power, water, sequence, wear, etc.)
*** The A-weighted mean sound pressure level Lpa (slow) and Lpa (impulse) at the operator’s workplace is below
70 dB(A) in every operating mode.

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6Conditions for installation and operation
The machine operator must arrange for the site preparatory work. This should be carried out by
approved contractors in accordance with general and local regulations. WMF customer service
technicians are only permitted to connect up the machine to the prepared connections. They are
not authorised to carry out plumbing or wiring work on site and will not be responsible for such
work!
Rated power 2.2 kW
Connecting cable, site supply* 3 x 1.52
Fuse, site supply 1 x 16 A
Mains voltage tolerance 230 V + 6 % - 10 %
Power cut < 50 ms does not affect machine operation
Water supply line TW 15 (min. DN 6 or 1/4") with main shutoff valve
and dirt filter installed by customer, 2 bar flow pressure
at 2 l/min, max. 6 bar
Water quality If the local water has a carbonate hardness over 5° a
WMF water filter must be fitted in the supply line.
Water drain line Hose, DN 19, minimum gradient 2 cm/m
Ambient temperature + 5°C to + 35°C (drain water system in case of frost)
Max. humidity
80 % rel. humidity without dewing. Do not spray
machine with water. Do not use machine out of
doors!
Installation clearance
For operating, service and safety reasons the machine
should be installed with clearance of not less than 50
mm from the back and sides from the building or non-
WMF components.
A clear height of 1100 mm from the top of the
supporting surface should be ensured. The height of
the supporting surface from the floor surface should be
not less than
700 mm and not more than 900 mm.
If the machine connections are to be routed down
through the counter, remember to also allow space for
the connections. These may restrict the available space
below the machine.
Water filter installation dimensions
W x H x D
Standard: 250 x 500 x 400 mm
Jumbo: 290 x 670 x 420 mm
* The on-site electrical system must comply with IEC 364. An e.l.c.b. switch with 30 mA rated fault current to
EN 61008 should be installed upstream of the unit for increased safety. An earthed socket outlet must be installed
near the unit for one-phase connection. A 5-pole CEE/CEKON socket outlet to EN 60309 must be installed for
three-phase connection. If the mains power cable of this unit is damaged, it must be replaced by our customer
service engineer or a similarly qualified person. If the machine is permanently connected on site, a disconnecting
device (master switch) to EN 60947 acting on all poles and with a contact gap of at least 3 mm must be installed
upstream. The disconnecting device is also recommended for flexible connection. The mains power cable must not
be allowed to come into contact with hot parts of the machine. Master switch and socket outlet are part of the on-
site installation. The machine must not be installed with permanent on-site connection when mounted on a trolley.

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7Operation
7.1 Starting the machine
Note:
The connection and installation of the machine must
only be carried out by WMF customer service.
WMF customer service sets the dispensing and hot water
quantities to the required volumes and trains your operating
personnel.
Daily starting up
Before the machine is started up, the main shutoff valve in
the fresh water supply line must be opened and the main
electrical switch supplying the machine must be turned on.
1. Open the door lock 12 (optional) and lift the front
door 8up.
2. Now switch the machine on using the ”On/Off“ 13.
The machine is switched on and heats up to operating
temperature (approx. 6 minutes).
3. Close the front door 8.
During the warming-up phase, depending on the
operating status, the display shows:
>>>Boiler supply
>>>Warm up
Once the machine has warmed up, the display shows: Ready
Pre Selection I
4. Now open the front door 8again, as after warming-up,
only the rinse button 10 needs to be operated for
warming-up and rinsing the line conveying the
beverages.
5. Rinsing begins after closing the front door 8– duration
approx. 10 seconds.
10 13

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Display:
Rinse!
Caution! Risk of scalding!
Hot water flows out of the beverage outlet 6.
Caution! Risk of crushing!
Close the front door 8with care.
6. On completion of rinsing, your machine is ready to
operate. The display shows:
READY
Pre-Selection I
„Ready“ The machine is ready to operate.
„Pre-Selec-
tion 1“ Only one drinking chocolate is prepared
per button press.
Always ensure that the reservoir 1is filled with chocolate
powder. Chocolate powder must always be visible in the
reservoir 1from outside.
Product:
Water soluble drinking chocolate as generally used in
the catering trade.
Option:
If your machine is equipped with an empty message, the
display will warn you that the reservoir is empty:
Choc powder
EMPTY
To delate the display, simply refill with chocolate powder.
7.2 Beverage preparation
Attention! Risk of scalding!
There is a risk of scalding in the beverage outlet area 6.

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De
p
endin
g
on ist desi
g
n
,
y
our machine has one or two - +
product buttons 5:
Pot
Chocolate
Cup
Two different quantities can thus be prepared. With the
swivelling beverage outlet 6, you can fill cups, pots or
beakers as required.
By pressing button 5the automatic preparation of drinking
chocolate begins. If several beverages are to be prepared in
a row, each button press can be automatically repeated up
to 12 times.
With the “+“ button, select the required number of
repetitions.
READY
Pre Selection 6
E.g. 6 x
Only 6 preparation cycles are carried out. With the “+“ or
“-“buttons the preselection can be increased or reduced at
any time.

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7.3 Displaying quantities
On the display 2of your WMF chocolate dispenser you can
read off the number of beverages taken.
1. Open the door lock 12 (optional) and lift the front
door 8up.
2. Switch the machine off using the “On/Off“ switch 13.
3. Keep the product key “ “5pressed and switch the
machine on using the “On/Off“ switch 13.
The display shows: Accounting /TA
Setting /SP
4. Using the product button 5“ “ you can call up the
number of the beverages taken, e.g.:
Choc cup
Quantity 197
5. If you press button “ “ the following appears, for
example:
Choc pot
Quantity 215
With the setting button 4“-“the number can be deleted.
6. Exit the display mode by switching off the „On/Off“
switch 13.
7. Close the front door 8.
Note:
When the machine has warmed up, the warming-up
block can be bridged with the “-“ button.
7.4 Waiter accounting system (optional)
In combination with an accounting system
(e.g. WMF HOGATRON), your WMF chocolate dispenser
can be fitted with a WMF waiter system.
For this, the chocolate dispenser can be equipped with a
waiter lock 8and connected to the accounting unit.
Release of the products takes place by inserting the
authorised waiter pens.
Billing of the products per waiter takes place in an external
accounting machine.

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7.5 Switching the machine off
Important!
Daily cleaning must be carried out before switching
off the machine (see 9.1 Daily cleaning on page 38).
1. Open the door lock 12 (optional) and lift the front
door 8up.
2. Switch the machine off using the “On/Off“ switch 13.
3. Close the front door 8.
At the end of operation the cut-off tap on the fresh
water supply line must be closed.
Important!
After switching off the machine, the main shutoff
valve on the water supply line must be closed and
the main power switch to the machine must be
switched off.
8Settings
8.1 Setting the dispensing quantities
You can change or set the product and water quantities on
your WMF chocolate dispenser.
1. Open the door lock 12 (optional) and lift the front
door 8up.
2. Switch the machine off using the “On/Off“ switch 13.
3. Keep the product key“ “ 5pressed and switch the
machine on with the “On/Off“ switch 13.
The display shows: Accounting /TA
Setting /SP
4. With the “rinse button“ 10, select the setting mode.
The product quantity value to be set flashes
(prod: xx):
Choc cup:
Prod:70 Water: 80
“+/-“ change flashing value
5. With the “rinse button“ 10, you come to the next setting
value. The quantity of water to be set now flashes
(wat:xx):
Choc cup
Prod:70 Water: 80
“+/-“ change flashing value

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If your machine has a second product button 5, you can,
by pressing button “ “, also change the setting values.
The product quantity to be set flashes first (prod:xxx): Choc pot
Prod: 145 Water: 160
“+/-“change flashing value
6. With the “rinse button“ 10 you reach the next setting
value. The quantity of water to be set flashes
(Wat: xxx):
Choc pot
Prod: 145 Water: 160
“+/-“change flashing value.
7. Now switch the machine on again using the “On/Off“
switch 13. You now leave the setting mode.
8. Close the front door 8.
Note:
When the machine is warm, the warming-up block
can be bridged with the “-“ button.
9. Check the beverages. If necessary, the setting
procedure must be repeated.
9Care of the machine
9.1 Daily cleaning
Caution! Risk of scalding!
During cleaning hot water flows out of the beverage
outlet 6.
Caution! Risk of injury!
Only operate the machine with the beverage outlet 6
and the reservoir 1in place. Before dismantling,
switch the machine off with the “On/Off“ switch 13.
Before starting up and after the end of operation, automatic
rinsing should be carried out.
1. Open the door lock 12 (optional) and lift the front
door 8up.
2. Press the ”rinse button“ 10. Rinsing begins after the
front door 8is closed.
10 13

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Rinsing takes approx. 10 seconds. The display shows:
Rinse!
Note:
Rinsing can be interrupted by opening the front door 8.
If your machine is not firmly connected to a drainage, the
drip tray 7can be removed for cleaning and emptying. For
this they are simply pulled out at the front.
Once rinsing is completed the display shows: READY
Pre Selection I
3. Open the door lock 12 (optional) and lift the front door
8up.
4. Now switch the machine off with the
“On/Off“ switch 13.
5. Pull the mixing beaker 11 out to the front.
11
6
7

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6. Remove the beverage outlet 6by turning to the right
(bayonet fitting).
After thoroughly cleaning the parts (with cleaner) and
the underlying whisk (with a damp cloth) the unit is
reassembled in reverse order.
7. Close the front door 8.
9.2 Weekly cleaning
Caution! Risk of injury!
Only operate the machine with the beverage outlet 6
and the reservoir 1in place. Before dismantling,
switch the machine off with the “On/Off“ switch 13.
1. The machine is switched off.
2. Open the door lock 12 (optional) and lift the front
door 8up.
3. Remove the reservoir 1from the machine. To do this,
lift it lightly at the front and remove by lifting up.
4. Empty the reservoir 1and then dismantle the
dispensing unit.
For this, the clamping nuts (a) on the outlet
cap 9and on the rear side are removed. The outlet cap 9
and the dispensing screw (b) can be pulled out towards
the back.
Note:
Before dismantling, notes the position of the outlet
cap 9. The outlet cap 9must be in the same position
after reassembly.
9
9
ab a

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5. Clean the inside and outside of the reservoir 1with the
supplied brush. Wet clean very dirty reservoirs with
water and dry carefully.
6. Clean also the dismantled parts thoroughly and
reassemble dry in reverse order.
7. Once all the parts have been assembly, the reservoir 1
is placed back in the machine and filled with chocolate
powder.
Ensure that after assembled the reservoir 1is properly
attached with the locking pins.
8. Close the front door 8.
9.3 General cleaning
When the machine is switched off, clean the panels and
drip tray with a damp cloth, and then rub dry with a fine
wool or suede cloth.
Do not scour with abrasive cleaning powder so that
scratches and scuffing do not occur.
Order numbers for the WMF care product range:
Special cleaner for milk frother
Order no. 33 0683 6000
Purargan forte
Order no. 14 2831 9990
Special Descaling Powder
Order no. 33 0680 8000
Special cleaning tablets
Order no. 33 0681 1000
9

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10 Error messages and displays
Error messages for the operator.
The following fault messages can be cancelled by the user:
Open water supply and confirm with the ”+“ button. Water supply ??
checked >>>/+
Front door 8not properly closed Æclose! Please close
>>> front door!
Optional: Refill with chocolate powder. Choc powder
EMPTY
Note for the operator:
Please bear in mind that this is a professional commercial choc dispenser. A machine of this type
requires regular maintenance by our WMF Customer Service. The maintenance interval depends on
how heavily the machine is used, but maintenance should be carried out at least once a year.
The following displays inform the operator about a particular operating status.
Machine ready to operate. READY
Pre Selection I
Wait until the warming-up process has been completed. >>>Warm up
Wait until the boiler system is filled with water. >>>Boiler supply
Notify WMF customer service. Info: Decalc.!
WMF Cust Serve
11 WMF Customer-Service
Our WMF customer service networks allows for easy
access to any area. Our expert technicians always carry
special tools and original WMF spare parts, which enable
them to efficiently perform any necessary repair work.
We recommend that a service agreement be signed with the
competent WMF service engineer in order to ensure that
the machine is inspected regularly.

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12 Warranty claims
WMF shall give a warranty for legitimate defects as to quality as follows:
Any products delivered or any services rendered showing a defect as to quality within the period of
limitation shall be, at WMF’s reasonable discretion, repaired or rendered again, if the cause of the
defect as to quality had already been present when the risk was passed.
Claims for defects as to quality are subject to a limitation period of 12 months. This period shall
start with the day when the risk is passed. The above period shall not apply in case there are longer
periods required by the German Civil Code (BGB), e.g. pursuant to § 479 Sec. 1 BGB (right of
recourse of the contractor), 438 Sec. 1 No. 2 BGB (buildings and things for buildings) and § 634a
BGB (defects of construction).
If putting the machine into operation is delayed for longer than four weeks due to reasons that are
beyond the control of WMF, the warranty period shall begin four weeks after the machine being
delivered to the customer.
The buyer shall immediately give written notice of defects as to quality to WMF. Replaced parts
shall pass into the ownership of WMF.
At first WMF shall always be given the opportunity for a subsequent performance within a
reasonable period. The buyer shall make available the rejected object to WMF.
We do not give a warranty:
-for any components that are subject to a normal wear and tear. This includes but is not limited
to gaskets and washers, ribbons, and proportioning devices;
-for defects caused by atmospheric influences, deposit of boiler scale, chemical, physical,
electro-chemical or electrical influences, unless these defects are attributed to a fault of WMF;
-if a water filter is dispensed with, although the on-site water regime requires the use of a water
filter, and this results in defects. It is pointed out to the customer in the respective
acknowledgement of order, whether the use of a water filter is required;
-for defects resulting from the failure to comply with the instructions relating to the handling,
maintenance and attendance of the device (e.g. operating and maintenance instructions of
WMF laid down in the operating manual of the respective percolator type);
-for defects resulting from the inappropriate or improper use, from the failure to use WMF
genuine spare parts or from the faulty installation by the buyer or a third party, or from a faulty
or negligent handling; and for consequences from modifications or repair works that were
made improperly and without our consent by the buyer or a third party.
Claims for damages by the buyer, irrespective of their legal grounds, particularly on account of
violations of the contractual obligation and on account of tortious acts, shall be excluded.
The above exclusion shall not apply in so far as there is a mandatory liability, e.g. in case of giving
warranties as to quality or durability, pursuant to the German Product Liability Act, in cases of
willful acts, of gross negligence, of fatal injuries, of bodily injuries or injuries to health, or in case
of any violation of substantive obligations from this contract. A reversal of the burden of proof to
the disadvantage of the buyer is not implied by the above regulations.