Scholl ZAU/NIV User manual

GBA G 1102 4 E
BA Page 1 of 27 Dezember 9, 2022
Last revised 12-2022 Rev. 4
Scholl Apparatebau GmbH & Co. KG
Instructions for Use
Built-in Bain-Marie ZAÜ/NIV
with water supply, drain and overflow,
with extension for ball valve,
with automatic water level control
Continuously heated basin Separately heated basins
Model-No. Art.-No. Model-No. Art.-No.
3111/ZAÜ/NIV G 1102
3112/ZAÜ/NIV G 1202 3112/2/ZAÜ/NIV G 1212
3113/ZAÜ/NIV G 1302 3113/3/ZAÜ/NIV G 1312
3114/ZAÜ/NIV G 2402 3114/4/ZAÜ/NIV G 2412
3115/ZAÜ/NIV VK-xxxxxx 3115/5/ZAÜ/NIV VK-xxxxxx
3211/ZAÜ/NIV G 2102
3212/ZAÜ/NIV G 2202 3212/2/ZAÜ/NIV G 2212
3213/ZAÜ/NIV G 2302 3213/3/ZAÜ/NIV G 2312
3214/ZAÜ/NIV G 2502 3214/4/ZAÜ/NIV G 2512
3215/ZAÜ/NIV VK-xxxxxx 3215/5/ZAÜ/NIV VK-xxxxxx
Size 31 Bain-Marie Size 32 Bain-Marie
Scholl Apparatebau GmbH & Co. KG
Zinhainer Weg 4
D–56470 Bad Marienberg/Germany
Phone [phone]
Fax [phone] (Service)
Internet www.scholl-gastro.de
E-mail [email protected]e

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Scholl Apparatebau GmbH & Co. KG
TABLE OF CONTENTS
Table of contents............................................................................................................................................... 2
Preface............................................................................................................................................................... 4
1Conventions............................................................................................................................................... 5
1.1 Pictograms –General safety notes .................................................................................................. 5
1.2 Pictograms –Warning notes............................................................................................................ 6
1.3 Pictograms –Important notes ......................................................................................................... 7
2Product information .................................................................................................................................. 8
2.1 Information regarding compliance with standards, laws and directives......................................... 8
2.2 Safety ............................................................................................................................................... 8
3Packing, transport, intermediate storage, scope of delivery .................................................................... 9
3.1 Packing............................................................................................................................................. 9
3.2 Transport.......................................................................................................................................... 9
3.3 Intermediate storage ....................................................................................................................... 9
3.4 Scope of delivery.............................................................................................................................. 9
4Installation and electrical installation ..................................................................................................... 10
4.1 Installation ..................................................................................................................................... 10
4.2 Electrical installation...................................................................................................................... 11
5Operation ................................................................................................................................................ 12
5.1 Intended use .................................................................................................................................. 13
5.2 Unintended use.............................................................................................................................. 14
5.3 Avoiding Malfunctions ................................................................................................................... 14
5.4Flooding Danger............................................................................................................................. 14
6Maintenance ........................................................................................................................................... 15
6.1 Maintenance and repair ................................................................................................................ 15
6.2Cleaning and care........................................................................................................................... 15
7Troubleshooting ...................................................................................................................................... 17
7.1 Avoiding Malfunctions ................................................................................................................... 17
7.2 Possible malfunctions .................................................................................................................... 18
7.3Possible Malfunctions water level control..................................................................................... 19
8Technical data.......................................................................................................................................... 20
8.1 Specifications for water quality ..................................................................................................... 20
8.2 Execution ....................................................................................................................................... 20
8.2.1 Technical data size 31 Bain-Marie ZAÜ/NIV, continuously heated ........................................... 21
8.2.2 Technical data size 31 Bain-Marie ZAÜ/NIV, separately heated ............................................... 21

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8.2.3 Technical data size 32 Bain-Marie ZAÜ/NIV, continuously heated ........................................... 22
8.2.4 Technical data size 32 Bain-Marie ZAÜ/NIV, separately heated ............................................... 22
8.3 Dimensioned drawings .................................................................................................................. 23
8.4 Circuit diagrams ............................................................................................................................. 23
9Water level control.................................................................................................................................. 24
9.1 Level relay application min/max.................................................................................................... 24
9.2 Level relay display and operating elements................................................................................... 24
9.3 Adjusting the sensitivity................................................................................................................. 24
10 Disposal and Environmental Notes .................................................................................................... 25
10.1 Disposal of packing material .......................................................................................................... 25
10.2 Disposal of the appliance............................................................................................................... 25
11 Warranty and service ......................................................................................................................... 26
11.1 Warranty conditions ...................................................................................................................... 26
11.2 Service............................................................................................................................................ 26
11.3 Service address .............................................................................................................................. 27

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Scholl Apparatebau GmbH & Co. KG
PREFACE
Congratulations!
In purchasing this new SCHOLL appliance you have chosen a product which meets highest technical stand-
ards while providing outstanding convenience in practical use.
This appliance has been designed with minimal energy consumption in mind. Used responsibly, it will serve
you well in an ecologically sound manner.
Please read the information in this manual carefully before starting up this appliance. On the following
pages you will find important notes regarding its operation, care and maintenance so that you will be able
to enjoy its use for a long time.
If a malfunction should nevertheless occur, please consult the "Troubleshooting" section first. In many cases
you should be able to remedy minor problems yourself, thus saving unnecessary service costs.
Please retain this manual carefully and pass it on to any subsequent user for his or her information and
safety.
A quality product, properly treated, will give you many years of satisfactory service.
We trust you will enjoy using this product!
Yours sincerely
Gustav Scholl Apparatebau GmbH & Co. KG

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Scholl Apparatebau GmbH & Co. KG
1 CONVENTIONS
1.1 PICTOGRAMS –GENERAL SAFETY NOTES
Be sure to observe these Instructions for Use as well as the safety notes to prevent
injuries or damage to health or property. Do not alter or modify this appliance.
Never use a defective appliance. If you suspect the unit of being faulty or discover
an unusual noise or smell, turn off the power switch and pull the plug out of the
socket-outlet, or otherwise disconnect the appliance from the mains and de-
energize it (i.e., ensure that it no longer carries any voltage). Do not use this appli-
ance when its power cord is damaged.
Failure to observe this warning may result in a fire hazard or electrical shock!
Maintenance and repair work must be carried out only by qualified professionals
using original spare parts and accessories. Do not attempt to carry out repairs on
this appliance yourself!
Connect this appliance to suitably earthed mains outlets only. Ensure that your
mains power supply conforms to the data stated on the nameplate of the appliance.
Failure to observe this warning may result in a fire hazard or electrical shock!
This appliance is not intended to be used by persons (including children) of limited
physical, sensory or intellectual abilities, or lacking in experience and/or knowledge,
unless they are supervised by a person responsible for safety who instructs them in
the use of the device. Children should be supervised to ensure they will not play
with this appliance.
Do not allow this appliance to operate unattended. Ensure that its power switch is
set to "0" before inserting the plug into an electrical socket-outlet or connecting the
appliance to the power supply. Avoid starting the unit unintentionally. Connecting
the unit to the mains with its power switch set to “1” may cause accidents.
Do not touch the surfaces of the appliance. The surfaces of this appliance may get
hot. Please allow the unit to cool down fully before cleaning or stowing it. Never
cover this appliance.
Burn injury or fire hazard!

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1.2 PICTOGRAMS –WARNING NOTES
Before any cleaning, maintenance or repair work is carried out, the appliance must
be disconnected from the mains and de-energized. To do so, it is not enough to set
the power switch to OFF. Instead, the mains plug must be pulled or the electrical
circuit must be de-energized, respectively. Check that no voltage is present before
opening the appliance, and lock out the circuit to make it safe against re-energizing.
Cleaning must only be performed by qualified persons who have read and under-
stood these Instructions for Use and are familiar with applicable hygiene rules. En-
sure that care is exercised during cleaning of the unit.
Cleaning of stainless steel
For light cleaning, wipe down the surface with a cloth or soft brush/sponge soaked
in warm water which contains a small amount of dishwashing detergent. Follow this
up by wiping with clear water until no cleaning agent residue remains on the sur-
face, as the latter might cause discoloration or stains. Finish by rubbing the surface
dry.
To remove more stubborn or extensive residue, a stainless steel cleaning product
may be used.
Never use any of the following for cleaning:
➢aggressive or bleaching products, i.e., containing active oxygen, chlorine, or
caustic/corrosive constituents.
➢abrasive cleaning products such as scouring creams/pastes, steel wool, saponi-
fied steel wool, metal or plastic sponges, or sponges with a scratchy surface
(scouring side).
Never use steam and/or pressure jet cleaning equipment to clean this appliance!
This might damage the appliance to the point where it may
pose a hazard to your life!
The total permitted regeneration and hot-holding time according to HACCP will be
exceeded after 3 hours.
Risk of potential health impairment!
Allow the unit to cool down before starting any cleaning work.
Burn hazard!

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1.3 PICTOGRAMS –IMPORTANT NOTES
DANGER
indicates an immediately threatening hazard.
Failure to observe this warning notice will result in severe physical injury or death.
WARNING
indicates a potentially dangerous situation.
Failure to observe this warning notice may result in severe physical injury or
death.
CAUTION
indicates a potentially harmful situation.
Failure to observe this notice may result in damage to property.
DANGER –electrical voltage
indicates an immediately threatening hazard.
Failure to observe this warning notice will result in severe physical injury or death.
CAUTION! IMPORTANT
Improper use may result in minor injuries or damage to property.
In addition to these Instructions for Use, a number of accident prevention and other
regulations apply with regard to the operation of this appliance. As regards food
handling, please observe HACCP rules concerning compliance with hygiene require-
ments.
If you have any questions, please contact your supervisor(s) or safety representa-
tive.
This product must not be disposed of in domestic waste.
Please arrange for proper recycling of this product via your local provider of waste
disposal services.

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2 PRODUCT INFORMATION
Bain-Maries are electrically heated warm retaining basins. Bain-Maries are operated with water and are
used for keeping warm preheated food at output temperature. Bain-Maries are feeded from above with
GN-insets in accordance with DIN EN 631-1.
2.1 INFORMATION REGARDING COMPLIANCE WITH STANDARDS,LAWS AND DIRECTIVES
This appliance conforms to the following:
Standards, laws, directives
2014/35/EU
Low Voltage Directive
2014/30/EU
EMC Directive
2.2 SAFETY
This appliance conforms to accepted technical rules and relevant safety codes.
However, proper use of the appliance is a prerequisite for effectively preventing
damage or accidents. Please comply with the notes provided in these Instructions
for Use.
Further safety notes, refer to section
➢1.1 Pictograms –General safety notes
➢1.2 Pictograms –Warning notes
➢1.3 Pictograms –Important notes

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3 PACKING,TRANSPORT,INTERMEDIATE STORAGE,SCOPE OF DELIVERY
3.1 PACKING
The type of packing employed will depend, to a large extent, on the adopted shipping mode and route.
Except where otherwise agreed by contract, packing will conform to the "HPE Packing Guideline" defined by
the German Federal Association of the Wooden Materials, Pallets and Export Packing Industry and by the
German Engineering Federation.
3.2 TRANSPORT
Particular care must be exercised during shipping and handling of this appliance to prevent damage result-
ing from exposure to excessive force or careless loading/unloading.
Shocks during shipping and handling must be avoided.
The appliance itself must be handled with care.
3.3 INTERMEDIATE STORAGE
Appliances not to be installed immediately upon delivery must be carefully stored in a protected place. For
the duration of such storage they must be properly covered to prevent any ingress of dust and moisture
into the unit.
3.4 SCOPE OF DELIVERY
The content of the delivery is stated in the delivery note and must be checked for completeness upon re-
ceipt.
Any damage in transit and/or missing items must be reported in writing immediately.

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4 INSTALLATION AND ELECTRICAL INSTALLATION
4.1 INSTALLATION
Before the installation of the appliance, observe the following:
•Inspect the unit for any defect or damage sustained in transit.
•Check all screw connections for tightness.
•Familiarize yourself with the Instructions for Use and with the conditions for the safe operation of this
appliance.
Practice:
•Place the unit at a suitable location.
•Prepare cut-out for Bain-Marie in on site worktop.
•Prepare cut-out for cover ZAÜ/NIV in on site counter cover.
➢Guide cover ZAÜ/NIV through the cut-out opening from behind and attach it.
•Attach the Bain-Marie from above in the workplace section.
•Seal the basin edge.
•Connect the water drain to the on site drain or connection.
•Connect the water supply to the on site connection.
Safety devices to protect drinking water in accordance with DIN EN 1717 must be installed on site!
•Attach the extension for ball valve to the on site counter cover.
•Clean the unit before the first use according to chapter "Cleaning and care”.

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4.2 ELECTRICAL INSTALLATION
Cover ZAÜ/NIV:
Full touch protection against electric shock hazard must be ensured
on site constructionally!
The appliance may only be installed by a qualified electrician whilst taking into
account the applicable regulations!
Connect this appliance to suitably earthed mains outlets only. Ensure that your
mains power supply conforms to the data stated on the nameplate of the appliance.
Failure to observe this warning may result in a fire hazard or electrical shock!
Before putting the appliance into service, observe the following:
•Faulty equipment must not be taken into operation!
•Legal requirements and the connection conditions of your local power supply company must be fully
observed.
•Electrical safety functions must be carried out and checked for operability.
•Full protection against electric shock hazard must be ensured by the installation.
•This device is protection class I, the mains connection line has a protective conductor.

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5 OPERATION
The Bain-Marie has a main switch and for each basin a dedicated thermostat and a dedicated indicator
lamp.
The main switch switches the Bain-Marie on and off and the thermostat sets the temperature.
Basin continuously heated: The Bain-Marie basin is automatically filled with water and is emptied by using
the drain valve.
Basins separately heated: The Bain-Marie basins are automatically filled with water and are emptied by
using the drain valve.
Main switch off Position "0"
Main switch on Position "I"
Thermostat off Position "0"
(Number "0" is below the mark)
Thermostat on Position "1" to "10"
(Number "1" to "10" is below the mark)
Indicator lamp lit Heating on
Indicator lamp dark Heating off
Always observe that the water supply tap is open in operation!

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5.1 INTENDED USE
Practice:
•Open water supply tap.
•Put the main switch in position "I" (ON).
➢The Bain-Marie basin is filled with water until the sensor switches off the inflow automatically.
➢The Bain-Marie will only heat when the required water level is reached.
Caution!
Check the filling level regularly during operation.
Do not let the Bain-marie boil dry!
•Turn the thermostat to the maximum temperature (position "10").
➢The heating time is approx. 45 minutes.
➢After the heating time, the device is ready for operation and can be equipped with the foods to be
kept warm.
➢The food must be preheated and must not be deep-frozen!
➢Please use height-adjusted gastronomy containers (20 cm high) for best heat performance.
➢The Bain-Marie basin should be seamlessly equipped with GN containers to avoid heat loss and ex-
cessive steam formation. Please use suitable crossbar.
•Set the thermostat to the desired temperature.
•For switching off after use of the Bain-Marie:
➢Turn the thermostat to the left in the position "0". The signal lamp goes out.
➢Put the main switch in position "0" (OFF).
➢Close the water supply tap.
➢The water in the Bain-Marie basin can be drained with the drain valve.
➢Let the Bain-Marie cool off and then clean the device thoroughly.
Caution: Hot steam!
Danger of scalding!
Do not touch the device surfaces. The surfaces of the device may grow hot. Please
let the device cool off entirely before cleaning it. Do not cover the device.
Danger of burns and fire!

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5.2 UNINTENDED USE
Please observe strictly:
•Bain-Maries are not for defrosting/warming up of deep-frozen/cooled food.
•Bain-Maries are not for cooking food.
•Bain-Marie must not be used without water!
•Bain-Marie must not be used with any liquids other than water!
5.3 AVOIDING MALFUNCTIONS
Fat and/or lime deposits at the measuring electrode may cause malfunctions. The
water level height is not recognised.
The Bain-Marie should be switched off by the main switch after use and the water
should be drained!
The basin and measuring electrode should be cleaned thoroughly every day!
5.4 FLOODING DANGER
Attention: Danger of flooding!
After use of the Bain-Marie
•switch off the thermostat (position “0“)
•switch off the main switch (position "0" OFF)
•close the water supply tap
•empty the basin
•let the Bain-Marie cool off
•clean the basin and the measuring electrode
Grease in the water can deposit on the measuring electrode.
The grease on the measuring electrode prevents recognition of the water level.
After a certain time, poss. hours, the level relay will switch on the water supply (if the water supply tap is
not closed and the main switch is not off) due to the grease-contaminated measuring electrode.
If the water level is not so reduced that the water overflow can discharge the water, the Bain-Marie will run
over!

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6 MAINTENANCE
6.1 MAINTENANCE AND REPAIR
Maintenance and repairs on the appliance must only be carried out by an author-
ized professional observing applicable safety regulations.
Improperly executed work will put your safety at risk!
Before any cleaning, maintenance or repair work is carried out, the appliance must
be disconnected from the mains and de-energized. To do so, it is not enough to set
the power switch to OFF. Instead, the mains plug must be pulled or the electrical
circuit must be de-energized, respectively. Check that no voltage is present before
opening the appliance, and lock out the circuit to make it safe against re-energizing.
6.2 CLEANING AND CARE
Before any cleaning, maintenance or repair work is carried out, the appliance must
be disconnected from the mains and de-energized. To do so, it is not enough to set
the power switch to OFF. Instead, the mains plug must be pulled or the electrical
circuit must be de-energized, respectively. Check that no voltage is present before
opening the appliance, and lock out the circuit to make it safe against re-energizing.
Never use steam and/or pressure jet cleaning equipment to clean this appliance!
This might damage the appliance to the point where it may
pose a hazard to your life!
➢Allow the unit to cool down before cleaning it. Burn hazard!
➢Stainless steel is particularly susceptible to scratching!
➢Remove lime, grease and starch residue immediately to avoid the formation of
stains.
➢When using a cleaning product, observe the instructions for use provided by its
manufacturer.

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Cleaning must only be performed by qualified persons who have read and under-
stood these Instructions for Use and are familiar with applicable hygiene rules. En-
sure that care is exercised during cleaning of the unit.
Cleaning of stainless steel
For light cleaning, wipe down the surface with a cloth or soft brush/sponge soaked
in warm water which contains a small amount of dishwashing detergent. Follow this
up by wiping with clear water until no cleaning agent residue remains on the sur-
face, as the latter might cause discoloration or stains. Finish by rubbing the surface
dry.
To remove more stubborn or extensive residue, a stainless steel cleaning product
may be used.
Never use any of the following for cleaning:
➢aggressive or bleaching products, i.e., containing active oxygen, chlorine, or
caustic/corrosive constituents.
➢abrasive cleaning products such as scouring creams/pastes, steel wool, saponi-
fied steel wool, metal or plastic sponges, or sponges with a scratchy surface
(scouring side).
We recommend you to clean the stainless steel surface once per week using a
standard commercial stainless steel care product. This will result in the formation of
a protective layer which prevents discoloration of the stainless steel surface.
In any event, observe the product manufacturer's instructions and try each product
in a small area first before applying it to a larger surface.

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7 TROUBLESHOOTING
Repairs must be carried out by an authorized specialist in compliance with applica-
ble safety codes and regulations.
Improperly executed work will put your safety at risk!
Note that some work must only be carried out by an electrical specialist. According to DIN EN 60204-1:
2011-01, specialists are "persons who by reason of their relevant training and experience are capable of
recognizing risks and avoiding potential hazards."
Some malfunctions you may be able to remedy yourself. Always check first if the problem is due to an oper-
ating error. Repairs are not free of charge, even within the warranty period, if the problem is caused by an
operating error or if you have failed to observe any of the following instructions.
Before any cleaning, maintenance or repair work is carried out, the appliance must
be disconnected from the mains and de-energized. To do so, it is not enough to set
the power switch to OFF. Instead, the mains plug must be pulled or the electrical
circuit must be de-energized, respectively. Check that no voltage is present before
opening the appliance, and lock out the circuit to make it safe against re-energizing.
Work at the electrical installation must only be performed by qualified
electricians!
Maintenance and repair work must be carried out only by qualified professionals
using original spare parts and accessories. Do not attempt to carry out repairs on
this appliance yourself!
7.1 AVOIDING MALFUNCTIONS
Fat and/or lime deposits at the measuring electrode may cause malfunctions. The
water level height is not recognised.
The Bain-Marie should be switched off by the main switch after use and the water
should be drained!
The basin and measuring electrode should be cleaned thoroughly every day!

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7.2 POSSIBLE MALFUNCTIONS
Malfunction
Cause
Remedy
Bain-Marie does not heat
No voltage supply
Check voltage supply
Fuse defective
Check fuse
Connection cable defective
Replace cable
Heating or thermostat defective
Replace heating or thermostat
Main switch or contactor defec-
tive
Replace main switch or contactor
Overheating protection has
switched off the Bain-Marie.
Switch off the Bain-Marie and let it
cool off!
After cooling down sufficiently:
The overheating protection resets
itself automatically.
Check water level control
Water level is not regulated
Level relay does not work pro-
perly
See chapter:
“Possible Malfunctions water level
control“
Solenoid valve defective
Replace solenoid valve
Level relay defective
Replace level relay
Food is not warm enough
Operating error:
GN-inset is not high enough
Use height-adjusted GN-insets
Operating error:
Basin opening not completely
closed
Equip basin fully with GN-insets

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7.3 POSSIBLE MALFUNCTIONS WATER LEVEL CONTROL
Malfunction
Cause
Remedy
Water keeps running in although
the measuring electrode is already
in the water.
A dirt layer has formed over the
measuring electrode due to
residue in the water.
Clean the measuring electrode
with a mild cleaning agent.
The conductivity value of the
water has changed due to outer
influences:
Higher conductivity
(e.g. contaminated water,
wetting with foam)
Lower conductivity
(e.g. descaled water)
Adjust potentiometer trigger
resistance (1). Also see "Recon-
ciliation of the trigger re-
sistance"
Turn potentiometer trigger
resistance (1) to the left
(towards 5kΩ)
Turn potentiometer trigger
resistance (1) to the right
(towards 250 kΩ).
An osmosis system for
low-scale water is used.
Turn the potentiometer trigger
resistance (1) all the way to the
right (250 kΩ).
Solenoid valve switches in very
short intervals.
The switching delay at the level
relay is set too short.
Turn the potentiometer switch-
ing delay (2) to the centre posi-
tion (approx. 5 s).
Water inlet into the basin is too
strong.
Flow opening at the solenoid
valve is open too far.
The solenoid valve is located
under the basin bottom in the
water supply line. The regulat-
ing screw at the solenoid valve
(hexagon socket SW6); Adjust-
ment of the regulating screw
permits adjustment of the wa-
ter pressure.
Attention: The water level
must be reduced so that the
water overflow can discharge
the water and the Bain-Marie
does not run over!
Service deployments due to the above malfunctions and their causes are not part
of the warranty and subject to charges!

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8 TECHNICAL DATA
8.1 SPECIFICATIONS FOR WATER QUALITY
Specifications for water quality
Quality
Drinking water
Total hardness
≤ 12°dH
Softening is recommended from 8°dH.
Conductivity
≥ 20 µS/cm
Temperature
≤ 40°C
Pressure
1,5 - 5 bar
8.2 EXECUTION
•Chrome nickel steel 18/10
•Basin indirectly heated, adhesive foil heating with overheating protection under the basin bottom
•Thermostat loosely attached, with built-in casing, cable length approx. 1.2 m
•Size 31 Bain-Marie: Basin rim folded 15 mm down all around
•Size 32 Bain-Marie: Bain-Marie basin for flush fitting
•Connection cable approx. 2 m long, without plug
•Level filling
➢Water supply, drain and overflow for on site steady connection
➢With automatic water level control
➢Water supply with solenoid valve from below
➢Water drain with ball valve incl. extension for on site panel