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