B.Pro B.PROTHERM 420 KBUH Quick guide

B.PROTHERM
420 KBUH/420 KBRUH/
620KBUH/620 KBRUH
Translation of the original operating instructions

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
General information
Copyright These instructions are protected by copyright. None of this information may
be reproduced, distributed, used to the advantage of our competitors, or
made accessible to third parties either completely or in part.
Technical changes Subject to modifications for the purpose of technical improvement.
Product documentation Translation of the original operating instructions;
target group: operating personnel, kitchen directors.
Typographical conventions Important note on special features or special cases.
IExplanatory information in chapters or sections containing instructions.
Cross reference to a chapter, section or external document.
Requirement which must be fulfilled before the subsequent steps can be
carried out.
Action or activity which must be carried out.
Unit model XYZ
A section identified in this way applies only to a particular unit variant or unit
option.
Warnings
Signal word!
Type and source of danger
Possible consequences of non-compliance with warnings.
Measures to avoid dangers and the consequences thereof.
The signal word (caution, warning, danger) indicates the level of danger.
Caution warns of possible minor bodily injuries or damage to property.
Warning warns of possible serious bodily injuries.
Danger warns of possible severe/fatal bodily injuries.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUHUH
Contents
About this product Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Conditions of use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
About this product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Cleaning and care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Transport Checking for/reporting on damage incurred during transportation. . . . . . . 9
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Disposing of packaging material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Commissioning Prerequisites for operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connecting unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation Unit overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Temperature control – overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Displaying the setpoint temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting the setpoint temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Opening a unit door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Closing the unit door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Preheating the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Loading the unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Moving unit to a new location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Keeping food hot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Removing food . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Shutting down Shutting unit down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting LED/temperature display does not light up . . . . . . . . . . . . . . . . . . . . . . . 22
Operation indicator LED illuminates, but temperature of food is not
(sufficiently) maintained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Temperature display is lit, but food temperature is not (adequately)
maintained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
The unit has external damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
The empty unit increases in weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Short Diagnosis of
BPT 420/620 KB(R)UH
from Version 2
Two-colour Power/Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Temperature display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Error messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Cleaning and care Cleaning frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Cleaning unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Detaching the unit door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
Maintenance Having unit regularly maintained. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Treating the sealing cap on the unit socket outlet with a rubber-care
agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Having periodical electrical safety inspection carried out . . . . . . . . . . . . . 29
Checking connection cable and mains plug . . . . . . . . . . . . . . . . . . . . . . . 29
Repairs Authorised persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Fault description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Disposal Disposing of unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Technical data General data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Ordering information B.PROTHERM 420 KBUH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
B.PROTHERM 420 KBRUH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
B.PROTHERM 620 KBUH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
B.PROTHERM 620 KBRUH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Operating instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Accessories Menu card set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Gastronorm containers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Slide-in frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Support crossbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Transport trolleys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
B.PRO microfibre cleaning cloth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 1 –
About this product
Application B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH is designed
for the following applications:
Keeping food hot in lidded Gastronorm containers
Transporting food in lidded Gastronorm containers
The B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH is not
suitable for heating up or cooking food.
It is not permitted to store or transport goods which have a detrimental affect
on food.
B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH must not be
used as a room heater.
The convection heating in the unit door may only be operated with the door
closed in conjunction with the B.PROTHERM 420 KBUH/420 KBRUH/
620 KBUH/620 KBRUH.
The B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH is par-
ticularly suitable for use in social facilities (clinics, retirement homes, children's
day care centres), hotels, the food service industry (banquets, party services)
and in company catering (canteens, dining halls).
It is not permissible to transport persons with or on the unit or its attach-
ments. The unit must not be used as a substitute for a ladder or as a (chil-
dren's) climbing frame (danger of tipping).
The unit may not be used to transport or store dangerous or toxic substanc-
es/liquids.
Conditions of use Environment
The unit may be used when the ambient temperature is between +15 °C and
+38 °C and at normal humidity (without condensation).
The unit has been developed for use up to 2,000 m above sea level.
Instruction of third parties
If the unit is lent to third parties, these persons must be instructed in the safe
handling of the unit and possible dangers must be pointed out.
Product features General information
The B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH is made
of polypropylene.
The walls and unit door are filled with PUR foam.
The unit can be heated up. The convection heating is found in the unit door.
The temperature is thermostatically limited.
The B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH is avail-
able with two different temperature control units:
B.PROTHERM 420 KBUH/620 KBUH: unit model with a fixed setpoint
temperature of approx. +90 °C
B.PROTHERM 420 KBRUH/620 KBRUH: unit model with temperature
control units for variable setting of setpoint temperature. The temperature
can be set in increments of one degree in a range between +40 °C and
+85 °C. A setpoint temperature of around +90 °C is reached at the max-
imum setting ("Full Power Mode").

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 2 –
The B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH is
equipped with a unit door locked using a bent-clamp closure. The patented
door hinge allows the unit door to be fitted in a specific position if required.
Operation
The B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH is load-
ed with GN 1/1 Gastronorm containers. Their subdivisions can also be used
by fitting a slide-in frame and support crossbars (accessory).
The B.PROTHERM 620KBUH/620KBRUH can, for example, hold two Gas-
tronorm containers with a depth of 200 mm (GN 1/1 – 200), and the B.PRO-
THERM 420KBUH/420KBRUH two Gastronorm containers with a depth of
150 mm (GN 1/1 – 150).
An operation indicator LED signals the B.PROTHERM
420KBUH/620KBUH's operating mode.
The B.PROTHERM 420KBRUH/620KBRUH features a two-digit temperature
display. The temperature display is located next to the plug recess.
After preheating for 45 minutes, room temperature has been heated up to
+75 °C +/- 5 °C in an empty unit with the unit door closed (B.PROTHERM
420KBRUH/620KBRUH in "Full Power" mode).
Effective insulation keeps the temperature of the food placed in the unit con-
stant for a long period of time, even without actively heating. The unit fulfils
Thermal Class A specifications as stipulated in BS EN 12571.
The synthetic skids on the bottom of the unit guarantee stability. Up to two
units can be stacked one on top of the other using the stacking corners on
top of the unit.
Synthetic, wear-resistant carrying handles are attached to the long sides of
the unit.
The unit door of the B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620
KBRUH is equipped with a menu holder. The contents of the unit, for exam-
ple, can be written on the menus (available as an accessory).
B.PRO supplies a variety of transport trolleys for the
B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH.
Cleaning
The unit door can be removed. The unit door, including the convection heat-
ing, is to be wiped clean with a damp cloth only. The plug recess is watertight
when closed.
The unit body (without unit door) can be cleaned in a dishwasher if the tem-
perature inside the dishwasher does not exceed +90 °C.
Repairs
The wear parts (skids, handles, hinges and stacking corners) can be easily
replaced.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 3 –
Safety
General information The unit has been built using state-of-the-art technology. All the requirements
necessary to ensure safe operation have been met. Nevertheless, residual
risk does exist when operating the unit. The safety precautions and warnings
in these operating instructions are there to help you protect yourself against
these hazards.
Safety precautions
Carefully read and observe the safety precautions in this chapter.
The operator is responsible for ensuring that safety precautions in these op-
erating instructions are observed.
Warnings
Observe the warnings with the danger symbol (warning triangle) in the text.
Operating instructions
These operating instructions must be read carefully prior to commissioning.
The operator is responsible for ensuring that all users have read these instruc-
tions before operating the unit for the first time.
Store these operating instructions in a location which is always accessible to
operating personnel.
Cleaning and maintenance
For cleaning, maintenance or parts replacement, disconnect the unit from the
power supply. During the work to be performed, keep the mains and/or unit
plug in a suitable place and protect it from moisture, damage and dirt.
About this product Application
The unit may only be used for the applications specified.
The operator is responsible for ensuring appropriate and proper use of the
unit.
Conditions of use
The unit may only be operated under the permissible ambient conditions.
Users of the unit must be instructed in its operation and must have under-
stood these operating instructions.
Warning signs
The following warning signs are mounted to the unit:
Replace illegible, damaged or missing signs immediately.
Warning sign Meaning - position of attachment
"Spraying with water prohibited" sticker as per DIN
4844-2 on the convection heating cover plate (in-
side of door)
"Hot surface warning" sticker as per DIN 4844-2 on
the heating cover plate (inside of door)

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 4 –
Transport Upright transport position
Transport the unit in an upright position only.
Stacking several units
Stack no more than two units one on top of the other. Always secure stacked
units to prevent them from tipping over.
Transporting with a truck or delivery vehicle
Secure the unit on all four sides to prevent it from shifting.
Secure the unit against vertical movement during transport.
Commissioning Commissioning after storage
When the unit is brought from a cold storage room to a kitchen, moisture from
the air in the room condenses on the surface of the unit. When the unit is con-
nected to the mains, there is a danger of the moisture film causing a short-
circuit or an electric shock.
Do not operate the unit until it has reached room temperature.
Mains connection
The mains voltage and frequency specified on the rating plate must match the
corresponding values for the mains socket outlet.
Use an original mains connection cable only.
The unit may not be used if the insulation on the mains cable, power plug or
unit plug is damaged.
Always unplug the mains plug and unit plug directly at the plug housing.
Operation on inverters
When using inverters (e.g. motor vehicle operation), always make sure that a
purely sinusoidal alternating current ("pure sine") is output at the output.
The use of inverters which do not meet this requirement will result in a defect
in the temperature control, and therefore in the failure of the unit.
Convection heating/Unit door
The convection heating is built into the removable unit door. Forceful impact
or vibrations can damage the convection heating. Avoid forceful impact and
vibrations.
Operate the unit with the original unit door only.
The convection heating in the unit door may only be operated with the door
closed in conjunction with the B.PROTHERM 420 KBUH/420 KBRUH/
620 KBUH/620 KBRUH.
Operation General information
The user must be aware of the hazards that the unit presents and be able to
assess them.
The unit may only be operated by persons whose physical, sensory or mental
abilities are not subject to any restrictions relevant to operating the unit.
reiner Sinus
Rechteckspannung
modifizierte Sinuswelle

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 5 –
Caution!
Possible impairment of food quality!
If a power failure, unit malfunctions or other interruptions occur during storage
or regeneration, the quality of the food stored in the unit may be impaired.
If the core temperature has fallen, check whether the food quality has
been impaired and dispose of any spoilt food if necessary.
Damage
The unit is only to be used when it is in proper working order.
If the unit is damaged, secure it against inadvertent use and inform B.PRO
Service immediately.
Hygiene regulations
Observe the corresponding regulations on foodstuffs and the properties of
the food when keeping food hot.
Stacking several units
Stack no more than two units one on top of the other.
Gastronorm containers with liquid food
Food which sloshes around and runs out of the unit can cause scalding. Al-
ways seal Gastronorm containers filled with liquid food with a sealing lid. Pre-
vent jerky movements of the Gastronorm containers.
Loading
Load unit with lidded Gastronorm containers only.
Gastronorm containers placed in the unit must be able to withstand a tem-
perature of at least +100 °C. Polycarbonate Gastronorm containers must not
be used, for example.
The Gastronorm containers are only to be used when they are in proper
working order. The edge may not be deformed or sharp. If this is the case,
the inside walls of the unit may be damaged.
Synthetic in the unit can be damaged at temperatures above +100 °C. Do not
place Gastronorm containers or other objects hotter than +100 °C in the unit,
e.g. Gastronorm containers heated in a combination steamer.
Operation
The convection heating in the unit door may only be operated with the door
closed in conjunction with the B.PROTHERM 420 KBUH/420 KBRUH/
620 KBUH/620 KBRUH. A large amount of heat is lost if the unit is operated
with the unit door open.
Do not operate external heat sources inside the unit.
Do not put an open flame inside the unit.
The unit door does not seal completely when closed. Hot steam can exit the
unit while keeping the food hot Danger of scalding!
Hot convection heating, unit parts, objects and food
The convection heating, the unit interior and objects contained within the unit
(e.g. Gastronorm containers) heat up during operation (up to approx. +90 °C)
and can cause burns. Protection (e.g. with pot holders or protective gloves)
must be used when handling hot objects.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 6 –
Warning!
Danger of scalding!
The unit lid does not close completely leak-tight, as otherwise a vacuum
would form during cooling, making it impossible to open the lid. As the lid
does not seal completely leak-tight, hot steam can exit the unit while keeping
the food hot, causing severe burns.
Open lid with great caution; wear protective gloves if necessary.
Change of location
The unit may be heavy when loaded. Lifting heavy loads can cause injuries.
This applies in particular for people who already have weakened musculo-
skeletal systems.
To minimize danger to your health, always lift the unit with a second person.
If possible, use suitable equipment to lift the unit.
Move the unit while upright, e.g. do not lay the unit on its side.
Hold unit door closed while changing its location.
Secure units stacked one on top of the other against tipping before changing
their location.
All possible measures must be taken to prevent risk to people or objects if a
mobile support such as a transport trolley is used to move a unit or two
stacked units. This includes the following:
Do not exceed the maximum load capacity of the support
Secure the unit(s) to the portable support so that they cannot tip over
Always move the unit(s) with two people
Only surfaces with an incline of less than 10° may be crossed
Secure the unit(s) from rolling away accidentally
The skids on the unit are worn down when it is moved directly on the floor.
To prevent the skids from wearing down, do not pull or push the unit directly
on the floor.
Under no circumstances push or pull crossways to the skids. Danger of tip-
ping.
The edges and corners of the synthetic body can be damaged by forceful im-
pacts. Water can seep into the unit walls in this case, especially when clean-
ing in a dishwasher.
Always handle the unit with care. Avoid impacts.
Cleaning and care Hygiene
You must comply with the regulations in the 93/43/EEC hygiene directive and
national hygiene regulations.
Cleaning frequency
Clean the unit thoroughly after each use.
Cleaning methods
Use only approved cleaning methods.
Do not use pointed or sharp objects for cleaning.
Do not use a steam jet unit or high-pressure cleaner.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 7 –
Cleaning agent
Use only approved cleaning agents.
Do not use scouring agents. Scouring agents scratch the surface.
Do not use any of the following cleaning agents (damage to material!):
Ethyl alcohol, isopropyl alcohol and higher alcohols
Acetone
Benzene
Turpentine
Acetic ester
Convection heating
Water which penetrates into the convection heating can cause a short circuit.
If this happens, there is a risk of electric shock.
Unplug the power plug and unit plug before cleaning.
Do not use metal parts for cleaning. Metal parts can damage the unit and/or
lead to corrosion.
Unit socket outlet
Water which penetrates into the unit socket outlet can cause a short-circuit.
If this happens, there is a risk of electric shock.
Unplug the mains plug and unit plug before cleaning the unit. Store the mains
connection cable in a suitable place and protect it from moisture. Seal the unit
socket outlet watertight with the sealing cap.
Hot convection heating, hot unit parts and objects
The convection heating, unit interior and the objects located within become
hot while the unit is in operation (danger of burns!). Allow the unit to cool off
before it is cleaned.
Cleaning water
Dry the unit thoroughly after cleaning.
There is a danger of slipping if cleaning water runs out onto the floor during
or after cleaning.
Completely wipe up cleaning water which runs out onto the floor.
Maintenance Periodical electrical safety inspection
Have a professional electrician perform a periodical electrical safety inspec-
tion as per the DIN VDE 0701-0702 series of standards at least once every
six months.
Connection cable and mains plug
Check the connection cable and mains plug for mechanical damage and
signs of excessive deterioration as per BGV A 3 or corresponding national
regulations at least once every six months.
Repairs Authorised persons
Only personnel trained by B.PRO may repair the unit. Notify B.PRO Service
in the event of damage.
The warranty will be invalidated if the unit is repaired by anyone else or without
being commissioned.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 8 –
Standards and guidelines Observe the applicable standards, guidelines and safety regulations.
The operator is responsible for compliance with the applicable standards,
guidelines and safety regulations.
Product marking The unit is provided with a rating plate. The warranty is voided if the rating
plate is removed.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 9 –
Transport
Checking for/reporting on
damage incurred during
transportation
The unit must be checked for damage incurred during transport (visual
inspection) immediately after delivery.
Document any damage incurred during transport (description of defect)
on the waybill in the presence of the carrier.
Have the carrier confirm the damage (signature).
Keep the unit and make a complaint to B.PRO about the damages and
include the waybill.
– or –
Do not accept the unit and return it to B.PRO via the carrier.
This procedure ensures that damage claims are handled correctly. The
unit recipient must provide suitable proof if transport damage is reported
at a later point in time.
Scope of delivery
(1) B.PROTHERM 420 KBUH/420 KBRUH or 620 KBUH/620 KBRUH
(2) Operating instructions
(3) Mains cable
The exact scope of delivery and model of the unit is to be taken from the de-
livery documentation.
Unpacking Open the transport packing at the places provided. Do not rip or cut it!
Check the scope of delivery.
Disposing of packaging material Packaging materials are recyclable.
Recycle packaging materials in a proper, environmentally responsible
manner as per applicable statutory requirements.
1
1
3
2

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 10 –
Commissioning
Prerequisites for operation There are no signs of defects or visible damage to the unit
Sinusoidal voltage when unit is operated via an inverter (e.g. motor vehi-
cle operation)
Connecting unit The unit does not have an "On/Off" switch. The unit is "switched on" by
connecting it to the power supply.
The in-house RCCB or fuse may trigger if too many cold units (maximum
power consumption) are connected to the power supply at the same
time.
Section "Electrical data" on page 32.
Caution!
Damage to the unit electrical system!
If the unit is not rated for the mains voltage or frequency which is available,
the unit electrical system may suffer permanent damage.
Before connecting, make sure that the mains voltage and mains frequen-
cy on the rating plate correspond with those for the mains socket outlet.
Ensure that no objects which are sensitive to heat are located inside the
unit.
Ensure that there are not too many units connected to the power supply
at the same time
Open the sealing cap of the unit socket outlet (on the rear side of the unit)
by turning the locking grip counterclockwise.
Fold sealing cap over and snap into the recess.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 11 –
Insert unit plug into the unit socket outlet.
B.PROTHERM 420 KBUH/620 KBUH
Plug the mains plug into the socket outlet.
The operation indicator LED flashes GREEN during the heat-up phase.
The LED lights up continuously when the heat-up phase is ended and the
temperature is reached.
The heating is switched on and off on the temperature control unit. The
operation indicator LED will flash green whenever the heating is switched
on. The operation indicator LED will be lit green continuously whenever
the heating is switched off.
B.PROTHERM 420 KBRUH/620 KBRUH
IThe factory setting of the unit is the "Full Power" mode (FP). The unit
reaches the maximum temperature (approx. +90 °C) in the "Full Power"
mode.
Plug the mains plug into the socket outlet.
The temperature display performs a LED self-test and displays 88 briefly
during the test.
The temperature display then switches to the actual temperature.
A dot LED to the right of the second temperature-display digit indicates
that heating is active.
When the temperature control switches the heating off, the LED to the
right of the second digit goes out. The temperature control can switch
heating off if the setpoint temperature is not yet reached.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 12 –
Operation
Unit overview
(1) Recessed area for the sealing cap when folded up
(2) Plug recess
(3) Sealing cap; unit socket outlet is located behind this
(4) Locking grip of the sealing cap
(5) On the front side of door BPT 420/620 KBUH: film with operation indica-
tor LED BPT 420/620 KBRUH: Temperature control
(6) Unit plug
(7) Mains cable
(8) Mains plug
(9) Stacking corner
(10) Carrying handle
(11) On the front side of door: Menu card holder
(12) Unit door
(13) Convection heating (in the unit door)
(14) Door hinge
(15) On the underside: Skids
(16) Locking latch of the door lock
(17) Support ledge
A menu card holder (accessory) can be placed in the menu holder. You
can write the name of the food contained in the unit on the menu with a
felt-tip pen.
16
8
7
6
9
11
12
15
1 2
3 4 5
10
13
14
17

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 13 –
Temperature control – overview Temperature control
B.PROTHERM 420 KBRUH/620 KBRUH
(1) Temperature indicator: when the unit is switched on, the actual temper-
ature inside the unit is displayed. The setpoint temperature is displayed
when a button is pressed.
An error code is shown on the temperature display if an error has oc-
curred.
(2) "Up" button: raises the setpoint temperature (press repeatedly or hold
down for several seconds).
(3) "Down" button: lowers the setpoint temperature (press repeatedly or
hold down for several seconds).
(4) Dot-shaped LED indicator "Heating in operation" lights up when the
heating is active.
B.PROTHERM 420 KBUH/620 KBUH
The setpoint temperature is fixed at +90 °C on the B.PROTHERM
420 KBUH/620 KBUH. These units feature a film with an operation indi-
cator LED instead of the temperature display and buttons.
The operation indicator LED flashes GREEN during the heat-up phase.
The LED lights up continuously when the heat-up phase is ended and the
temperature is reached.
°C
1 2
34
Power

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 14 –
Displaying the setpoint
temperature
B.PROTHERM 420 KBRUH/620 KBRUH
IThe temperature range of the temperature control lies between +40 °C
and +85 °C. The maximum temperature (approx. +90 °C) is reached in
the unit in the "Full Power" mode (FP). The "Full Power" mode is the fac-
tory setting of the unit.
Connect the unit to the power supply.
Section "Connecting unit" on page 10.
The temperature display performs a LED self-test and displays 88 briefly
during the test.
The temperature display then switches to the actual temperature.
A dot LED flashing to the right of the second temperature-display digit in-
dicates that heating is active.
To display the setpoint temperature, briefly press any button at the tem-
perature control.
The setpoint temperature is displayed. The message FP indicates "Full
Power" mode, i.e. the maximum setpoint temperature.
The display automatically switches back to the actual temperature a few
seconds later.
Setting the setpoint temperature B.PROTHERM 420 KBRUH/620 KBRUH
The lowest temperature setting is +40 °C, and the highest FP (Full Pow-
er), which corresponds to a temperature of about +90 °C.
While the setpoint temperature is being set, the unit switches off heating
automatically. The dot LED to the right of the second temperature-display
digit does not illuminate. When the setpoint temperature is set, heating
switches on automatically if the actual temperature is too low.
Unit is connected to the power supply
To lower the setpoint temperature, press the "down" button briefly sev-
eral times in succession.
The initial press displays the setpoint temperature (FP indicates "Full
Power" mode). Each subsequent press reduces the setpoint temperature
by 1 °C.
– or –
Press and hold down the "down" button.
After approx. 1 second, the temperature setting changes continuously.
To raise the setpoint temperature, press the "up" button repeatedly.
The initial press displays the setpoint temperature (FP indicates "Full
Power" mode). Each subsequent press increases the setpoint tempera-
ture by 1 °C.
– or –
Press and hold down the "up" button.
After approx. 1 second, the temperature setting changes continuously.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 15 –
When setting is complete, wait until the temperature display switches to
the actual temperature.
The last setting of the setpoint temperature is saved automatically.
IThe unit continuously saves the setpoint temperature. If the voltage
supply is interrupted, the last set setpoint temperature is active.
IIf the voltage supply is interrupted while a new setpoint temperature is be-
ing set, the previous setpoint temperature remains unchanged. The unit
saves a new setpoint temperature when the temperature display returns
to the actual temperature.
Opening a unit door Unit disconnected from the power supply
Open the locking lever until the locking latch disengages (1).
Swing locking latch out of the way (2).
Open the unit door.
Caution!
Danger of tipping!
There is a risk of the container tipping over due to the unit door's centre of
gravity if the unit door is opened to an adverse angle.
Select door opening angle 90° or 270°. Do not use any other door open-
ing angles and provide safety measures to prevent tipping.
1.
2.

B.PROTHERM 420 KBUH/420 KBRUH/620 KBUH/620 KBRUH
– 16 –
Closing the unit door Close the unit door.
Hook the locking latch (1.) and close the locking lever (2.).
Preheating the unit Preheating is not necessary if a large portion of the unit's volume is load-
ed with hot food. If only a small amount of hot food is inserted, we rec-
ommend preheating the unit before loading it with food.
B.PROTHERM 420 KBUH/620 KBUH
After preheating for 45 minutes, the interior of the empty unit has heated
up to +75 °C +/- 5 °C.
B.PROTHERM 420 KBRUH/620 KBRUH
The interior of the empty unit has heated up to +75 °C +/- 5 °C after pre-
heating for 45 minutes in "the Full Power" mode.
90°
270°
2.
1.