Durr Dental XR 24 Pro User manual

EN
2021/03
XR 24 Pro
Installation and Operating Instructions
9000-600-74/30


EN
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2
Content
Important Information
1. About this document � � � � � � � � � � � � � � 4
1�1 Warnings and symbols � � � � � � � � � � � 4
1�2 Copyright information � � � � � � � � � � � � 4
2. Safety � � � � � � � � � � � � � � � � � � � � � � � � � � 5
2�1 Intended Purpose � � � � � � � � � � � � � � � 5
2�2 Intended Use � � � � � � � � � � � � � � � � � � 5
2�3 Improper Use � � � � � � � � � � � � � � � � � � 5
2�4 General safety notes � � � � � � � � � � � � � 5
2�5 Specialist personnel � � � � � � � � � � � � � 5
2�6 Duty to report serious incidents � � � � 6
2�7 Protection from electric shock � � � � � 6
2�8 Essential performance characteri-
stics � � � � � � � � � � � � � � � � � � � � � � � � 6
2�9 Only use original parts � � � � � � � � � � � 6
2�10 Transport � � � � � � � � � � � � � � � � � � � � 6
2�11 Disposal � � � � � � � � � � � � � � � � � � � � � 6
3. Delivery Contents � � � � � � � � � � � � � � � � � 7
3�1 Optional items � � � � � � � � � � � � � � � � � 7
3�2 Consumables � � � � � � � � � � � � � � � � � � 7
3�3 Wear parts and replacement parts
� � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7
3�4 Accessories � � � � � � � � � � � � � � � � � � � 7
4. Technical Data � � � � � � � � � � � � � � � � � � � 8
4�1 Type plate � � � � � � � � � � � � � � � � � � � � 9
4�2 Evaluation of conformity � � � � � � � � � � 9
5. XR 24 Pro functional layout � � � � � � � � 10
6. XR 24 Pro functional description � � � � 11
6�1 PCB (main board) layout � � � � � � � � � 11
Mounting
7. Set-up � � � � � � � � � � � � � � � � � � � � � � � � � 12
7�1 Room for set-up � � � � � � � � � � � � � � � 12
7�2 Set-up alternatives � � � � � � � � � � � � � 13
7�3 Set-up � � � � � � � � � � � � � � � � � � � � � � 13
8. Installation � � � � � � � � � � � � � � � � � � � � � 14
8�1 Water connections � � � � � � � � � � � � � 14
8�2 Waste water connections � � � � � � � � 15
8�3 Waste water hose connection
from developer and fixer � � � � � � � � � 15
9. Start-up and first use � � � � � � � � � � � � � 16
9�1 Clean unit � � � � � � � � � � � � � � � � � � � 16
10. Electrical connection � � � � � � � � � � � � � 17
11. Circuit diagram � � � � � � � � � � � � � � � � � � 18
11�1 PCB (main board) operating func-
tions � � � � � � � � � � � � � � � � � � � � � � � 18
11�2 PCB (main board) control func-
tions � � � � � � � � � � � � � � � � � � � � � � � 18
11�3 PCB (main board)
power functions 230V � � � � � � � � � 19
12. Start-up and first use � � � � � � � � � � � � � 20
12�1 Settings / service operation for
the Service Technician � � � � � � � � � � 21
12�2 Check temperature of the develo-
per and carry out commissioning
test � � � � � � � � � � � � � � � � � � � � � � � � 22
13. Transport � � � � � � � � � � � � � � � � � � � � � � � 23
13�1 Remove drainage hoses � � � � � � � � 23
13�2 Protection from damage � � � � � � � � 23

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Use
13�3 Program overview � � � � � � � � � � � � � 24
13�4 Service / Fault message � � � � � � � � 24
14. Operation � � � � � � � � � � � � � � � � � � � � � � � 24
14�1 In the morning or before surgery
start � � � � � � � � � � � � � � � � � � � � � � � 25
14�2 To change program: � � � � � � � � � � � 26
14�3 In the evening or after surgery
closing � � � � � � � � � � � � � � � � � � � � � 26
14�4 Surgery or clinic closures � � � � � � � � 26
14�5 Film recommendation list for Dürr
Dental Developer XR 24 ��� � � � � � � 27
15. Maintenance � � � � � � � � � � � � � � � � � � � � 28
15�1 Change the chemicals � � � � � � � � � � 29
15�2 Every 2 months cleaning tanks
and roller sets � � � � � � � � � � � � � � � � 32
Trouble-shooting
16. Tips for Service Technicians � � � � � � � � 35
16�1 Fault message on display panel
with audible signal � � � � � � � � � � � � � 36
17. Tips for Service Technicians � � � � � � � � 37
18. Tips for Trouble-shooting � � � � � � � � � � 38
18�1 Before starting � � � � � � � � � � � � � � � 38
18�2 Remove front panel � � � � � � � � � � � � 38
18�3 Remove rear panel � � � � � � � � � � � � 38
18�4 Remove side panels � � � � � � � � � � � 38
18�5 After completing work � � � � � � � � � � 38
18�6 Service mode plan � � � � � � � � � � � � 39
18�7 Changing display � � � � � � � � � � � � � � 41
18�8 Check unit fusing � � � � � � � � � � � � � 41
18�9 Changing the process heater and
PTC-sensor � � � � � � � � � � � � � � � � � � 42
Appendix
19. Handover record � � � � � � � � � � � � � � � � � 44

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1. About this document
These installation and operating instructions re-
present part of the unit�
Failure to comply with the instructions
and information in these installation and
operating instructions means that Dürr
Dental will not be able to offer any war-
ranty or assume any liability for the safe
operation and the safe functioning of the
unit�
The German version of the installation and ope-
rating instructions is the original manual� All
other languages are translations of the original
manual�
These operating instructions apply to XR 24
Pro:
Order number:
• 1700-08
1.1 Warnings and symbols
Warnings
The following terminology and symbols are used
in these Installation and Operating Instructions
to denote particularly important information:
Restrictions and regulations con-
cerning the prevention of perso-
nal injury or extensive damage.
Warning – risk of dangerous elec-
tric voltages
Other symbols
These symbols are used in the document and
on or in the unit:
Note, e�g� specific instructions regarding
efficient and cost-effective use of the unit�
Observe the operating instructions�
CE labelling
Manufacturer
Serial number
Order number
Medical device
Dispose of correctly in accordance with
EU Directive 2012/19/EU (WEEE)�
Power switch ON/OFF
/ Select parameters
Confirm selection
Turn the power switch ON
Turn the power switch OFF
In the mornings – open the water tap
In the evenings – close the water tap
28 x 24 h
Change the chemicals every 4 weeks
Drain the chemicals
Clean the machine unit
Fuses in accordance with IEC 60127-2
1.2 Copyright information
All circuits, processes, names, software pro-
grams and units mentioned in this document are
protected by copyright�
The installation and operating instructions may
not be copied or reprinted, either in full or in
part, without written authorisation from Dürr
Dental�
Important
Information

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2. Safety
Dürr Dental has developed and designed the
unit in such a way that dangers are effectively
ruled out if the unit is used in accordance with
the Intended Use�
Despite this, the following residual risks can
remain:
• Personal injury due to incorrect use/misuse
• Personal injury due to mechanical effects
• Personal injury due to electric shock
• Personal injury due to radiation
• Personal injury due to fire
• Personal injury due to thermal effects to skin
• Personal injury due to lack of hygiene, e�g�
infection
2.1 Intended Purpose
The unit is intended solely for the development
of extraoral and intraoral X-ray film in dental ap-
plications in accordance with the Dürr Dental
Film Recommendation List� The unit contains a
roller transport system that transports the film
after exposure with X-ray beams through the
developer, fixer and water baths and then sub-
sequently through the drying sections�
2.2 Intended Use
The unit is intended solely for the development
of extraoral and intraoral X-ray film in dental ap-
plications in accordance with the Dürr Dental
Film Recommendation List� The unit contains a
roller transport system that transports the film
after exposure with X-ray beams through the
developer, fixer and water baths and then sub-
sequently through the drying sections�
The device may only be operated using acces-
sories and optional accessories specified or ap-
proved by Dürr Dental� For cleaning and disin-
fection of the unit, only use disinfectants that
have been recommended or approved by Dürr
Dental� All legal requirements that apply at the
site of use in relation to health and safety in the
workplace and to the disposal of chemicals
must be complied with�
2.3 Improper Use
Any other usage or usage beyond this scope is
deemed to be improper� The manufacturer ac-
cepts no liability for damage resulting from impro-
per usage� In such cases, the user/operator will
bear the sole risk�
This unit is not suitable for monitoring patients
over longer periods of time� The unit is not desi-
gned for operation within the patient
environment�
Only photographic chemicals that are coordina-
ted with the development process may be used�
The waste water drainage line must have a
downward gradient� The developer and fixer
must be disposed of separately as special was-
te in suitable containers in accordance with nati-
onal regulations and guidelines�
Due to the bath temperature that needs to be
maintained for the process, optimum developing
quality can only be ensured up to an ambient
temperature = bath temperature�
This unit must not be operated in operating the-
atres or similar rooms, in which dangers may
arise from the combustion of flammable
materials�
2.4 General safety notes
• Always comply with the specifications of all
guidelines, laws, and other rules and regulati-
ons applicable at the site of operation for the
operation of this unit�
• Check the function and condition of the unit
prior to every use�
• Do not convert or modify the unit�
• Comply with the specifications of the
Installation and Operating Instructions�
• The Installation and Operating Instructions
must be accessible to all operators of the unit
at all times�
2.5 Specialist personnel
Handling
Unit operating personnel must ensure safe and
correct handling based on their training and
knowledge�
• Instruct or have every operator instructed in
handling the unit�
Installation and repairs
• All installation, resetting, alteration, extension
and repair work must be carried out either by
Dürr Dental personnel or by a suitably quali-
fied person approved by Dürr Dental�

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2.6 Duty to report serious
incidents
The operator/patient is required to report any
serious incident that occurs in connection with
the device to the manufacturer and to the com-
petent authority of the Member State in which
the operator and/or patient is established/
resident�
2.7 Protection from electric shock
• Comply with all the relevant electrical safety
regulations when working on the unit�
• Never touch the patient and unshielded plug
connections on the unit at the same time�
• Replace any damaged cables or plugs
immediately�
Observe the EMC rules concerning medical
devices
• The device is designed for use in a basic elec-
tromagnetic environment (in accordance with
EN61326-1)�
• Portable and mobile HF communication appli-
ances can interfere with the effectiveness of
electrical medical devices�
2.8 Essential performance
characteristics
The unit does not have any essential perfor-
mance characteristics as set out in IEC60601-1
section 4�3�
2.9 Only use original parts
• Only use accessories and optional items that
have been recommended or specifically ap-
proved by Dürr Dental�
• Only use only original wear parts and replace-
ment parts�
Dürr Dental accepts no liability for dama-
ges resulting from the use of non-appro-
ved accessories or optional accessories,
or from the use of non-original wear parts
or replacement parts�
The use of non-approved accessories,
optional parts or non-genuine wear parts/
replacement parts (e�g� mains cables)
can impair electrical safety and EMC�
2.10 Transport
The original packaging provides optimum pro-
tection for the unit during transportation�
If required, original packaging for the unit can be
ordered from Dürr Dental�
Dürr Dental will not accept any responsi-
bility or liability for damage occurring du-
ring transport due to the use of the incor-
rect packaging, even where the unit is
still under guarantee�
• Only transport the unit in its original
packaging�
• Keep the packing materials out of the reach of
children�
• Before transporting the unit, please refer to
the additional information under point 13�
2.11 Disposal
Unit The unit must be disposed of properly�
Within the European Union, the unit must
be disposed of in accordance with EU
Directive 2012/19/EU (WEEE)�
• If you have any questions about the correct
disposal of parts, please contact your dental
trade supplier�
An overview of the waste keys for Dürr
Dental products can be found in the
download area at www�duerrdental�com
(document no� P007100155)�
Chemicals
• Empty developer and fixing agent concentrate
bottles must be disposed of in accordance
with national regulations�
• Once used, the working solutions of develo-
per and fixing agent must be disposed of in
accordance with local waste water
regulations�

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3. Delivery Contents
The following items are included in the scope of
delivery (possible variations due to country-spe-
cific requirements and/or import regulations):
XR 24 Pro � � � � � � � � � � � � � � � � � � � � � � 1700-08
DÜRR-AUTOMAT XR/C+(with Vitamin C)
Developer and fixer concentrate for 2
preparations
Accessories
Collecting vessel (10 litres) for developer
Collecting vessel (10 litres) for fixer
Fine filter
Installation and operating instructions for XR 24
Pro
Quick start instructions for preparing the chemi-
cals and cleaning the unit
3.1 Optional items
The following optional items can be used with
the unit:
Regeneration unit RU 24 Pro� � � � � 1700-820-00
Collecting vessel (20 litres) for devel-
oper � � � � � � � � � � � � � � � � � � � � � � � 1416-021-00
Collecting vessel (20 litres) for fixer 1416-011-00
Preparation container E with lid � � � 1330-015-00
Preparation container F with lid � � � 1330-016-00
Daylight attachment DL 26 � � � � � �1700-920-00
Suitable for standard film sizes up to
24 x 30 cm max�
Water hose with Aqua-Stop � � � � �1330-001-51
3.2 Consumables
The following materials are consumed during
operation of the device and need to be reorde-
red separately:
Spray cleaner WR 2000, for trans-
port rollers, pack of 6 � � � � � � � � CCB800C5540
Cleaning film Dürr Clear 100, 100x 1410-007-00
3.3 Wear parts and replacement
parts
Information about replacement parts is
available from the portal for authorised
specialist dealers at:
www�duerrdental�net�
3.4 Accessories
DÜRR-AUTOMAT XR/C+(with
Vitamin C)
Developer and fixer concentrate for 2
preparations � � � � � � � � � � � � � � � �CXB150C9940
Film types – intraoral
Kodak Ultra Speed
2�2 x 3�5 cm
3�1 x 4�1 cm
2�7 x 5�4 cm
5�7 x 7�6 cm
Kodak Insight
2�2 x 3�5 cm
3�1 x 4�1 cm
2�4 x 4�0 cm
2�7 x 5�4 cm
5�7 x 7�6 cm
Agfa Dentus M2 Comfort
2 x 3 cm
3 x 4 cm
5 x 7 cm
Film types – extraoral
Kodak
T-Mat L/RA
T-Mat G/RA
Ektavision L
Ektavision G
Agfa
Dentus Ortholux

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4. Technical Data
Electrical data
Rated voltage V 230
Mains frequency Hz 50 / 60
Nominal current A 4
Rated power W 950
Heating performance
Bath heating
Drying
W 400
450
Heat-up time min ~20
0�5°C / min
G fuse link
IEC60127-2
A T6,3AH
Type of protection IP20
Protection class I
General technical data
Film processing time min 3:15 - 6:00
Tank volume
Developer, fixer
l 5 each
Bath circulation
Developers
Fixer
l / min
~1�4
~1�7
Water flow rate l / min 2�7-4�0
Water pressure
min�
max�
bar
2
6
Fresh water connection inches G 3/4"
Waste water connection mm Ø 20
Duty cycle % 100 (S1)
Weight kg 21�4
Noise level dB(A) < 70
Dimensions (H x W x D) cm 44 x 42 x 51
Classification
Medical Device Class I
Ambient conditions during storage and transport
Temperature °C -10 to +60
Relative humidity % < 95
Ambient conditions during operation
Temperature °C +10 to +25
Relative humidity % < 70
RU 24 Pro
Rated voltage V 230
Mains frequency Hz 50/60
Nominal current A 0�7
Rated power W 80

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4.1 Type plate
The type plate is located on the rear side of the
unit�
4.2 Evaluation of conformity
This unit has been subjected to a conformity as-
sessment procedure in accordance with the
current relevant European Union guidelines� This
unit conforms to all relevant requirements�

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5. XR 24 Pro functional layout
1 Film feed
2 Start flap
3 Roller set - film feed
4 Drive shaft
5Roller sets developer/fixer (D/F)
6Roller set - water
7 Water inflow
8Roller set - dryer
9 Safety switch “dryer”
10 Dryer heating
11 Fan
12 Drive motor
12a Speed sensor
13 Fluid level indicator sensor “Water”
14 Rotary pump (for D and F)
15 Water intake valve
16 Circulation heater
17 PTC-sensing device
18 Overflow pipe F with drainage plug
19 Lifter
19a Light barrier for lifting bath
20 Lift motor
21 Overflow pipe D with drainage plug
22 Lifting bath
D Developer bath
F Fixer bath
W Water bath
A Power switch on main display
Stand-by Position
2 A 3 4 5 6 7
20 19 19a 18 17 16
8
9
10
11
12
13
14
15
22
21
1
F
W
E
12a

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6. XR 24 Pro functional
description
Press the power switch (min. 2 secs)
and the display lights up� The warming-up pha-
se for the developer and fixer baths begins� The
necessary waiting time required before the re-
quired temperature has been reached is shown:
"WAITING . . MIN" (display panel blinks)� The
unit will not start during this warm-up stage�
The bath circulation process starts parallel
to the bath heating� During the circulation step
the rotatory pump (14) feeds the chemicals from
the developer and fixer baths (tank volume of
each is 5 liters) to the lifting bath (22)�
Once the set temperature has been
reached the display will show "MACHINE
EMPTY", i�e� the unit is now ready for use�
As soon as the set temperature falls by more
than 0�5 °C the process heater and rotary pump
(14) will start up again�
When a film is inserted, the film feed flap (2)
opens and the display will show a blinking mes-
sage: "MACHINE LOADED"�
At the same time a signal is triggered to lower
the lifting bath (22), the water intake valve (15) is
opened, and the dryer heater (10), drive motor
(12) and the rotatory pump (14) (for developer
and fixer bath circulation) all start up�
The processing time can be checked using
the speed sensor (12a)� The raising and lowe-
ring of the lifting bath is controlled by the rotati-
on of the disc (driven by the lift motor (20)) and
is monitored by the infrared light sensor (19a)�
When the lifting bath (22) is lowered the film is
transported between the rollers and through the
developer and fixer baths, and then through the
rinsing and drying zones (8) in the preset pro-
cessing time�
During the film processing, water is released via
the water inflow (7) into the rinsing zone� The
water is drained off via the waste water system�
There is a continuous flow of water of ca� 2 l/
min, at 2 bar� If the waste water drainage gets
blocked, then the level indicator sensor (13)
sends an audible signal, the water intake valve
(15) is closed and the water inflow is halted�
Once the film has been taken up the film feed
flap (2) closes� As soon as the blinking mes-
sage "MACHINE LOADED" on the display panel
is extinguished, then a further film or 6 intraoral
films side-by-side can be fed in�
If, after the film processing stage (message is
audible signal), no further film is inserted, then
the lifting bath (22) is raised (stand-by position
"MACHINE EMPTY")� The drive motor (12), wa-
ter intake valve (15) and dryer heater (10) will
then be switched off� In the stand-by position
the developer and fixer roller set (5) is complete-
ly submerged in the chemicals� This serves to
prevent the majority of any deposits attaching
themselves to the rollers�
6.1 PCB (main board) layout
23 A Operating parts
23 B Control functions
23 C Power functions
23 A
23 B 23 C

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7. Set-up
7.1 Room for set-up
• The XR 24 Pro developer may only be opera-
ted in a clean, dry and well-ventilated room�
• Room temperature must not fall below +10 °C
in winter and must not exceed +28 °C in
summer�
• The room chosen for set-up must have ac-
cess to a water connection (water tap) (27)
R3/4" with pipe anti-vacuum device, waste
water drainage (28) with aeration (anti-odour)
via plastic siphon and an electrical safety so-
cket (26)� We strongly recommend that a
wash basin be available in the vicinity of the
developer�
The water tap (27) and electrical safety
socket (26) must be easily accessible to
the operating personnel�
• We strongly recommend that set-up of the
XR 24 Pro is effected in a darkroom� If the ap-
pliance cannot be set up in a darkroom, then
a daylight cover (24) (DL 26) must be fitted�
• When operating an appliance with daylight
cover (24) please note:
Never expose the machine to direct
sunlight! Danger of the chemicals
overheating or pre-exposure of film
materials. Never store film material
in the vicinity of the X-ray room!
Once film material is inserted into the
film depot (25) of the daylight cover the-
re is the danger that pre-exposure can
occur due to stray ambient radiation
from the X-ray appliance�
• If necessary, it is possible to set up a separa-
ting wall or barrier using lead protection�
27
26
28
24
25
Mounting
1
2
3

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24
7.2 Set-up alternatives
• Place the developer unit onto a horizontal,
stable, flat, and single-piece working surface
at a comfortable working height�
• In order to have access to the hoses the wor-
king surface should have at least one opening
of ca� 7 x 10 cm�
• Take into account that additional space may
be required for service and maintenance and
that sufficient ventilation is available for the
unit: to the rear leave at least 10 cm, left and
right allow ca� 50 cm free space
• Leave enough space at the front in case a
daylight cover (24) is to be used� If necessary,
unscrew the adjustable feet from the front and
apply to the rear�
7.3 Set-up
• First remove the plastic tapes to the
packaging and carefully lift the box upwards�
• Remove all small parts�
• Take the unit from the sides and place as
required�
• Set up the unit in the vicinity of water supply,
waste water system and electrical safety so-
cket (max� distance 1�5 m)
• Set up the appliance so that it has a slight tilt,
ca� 0�3 ° to the fixer bath (fig� 6)� Adjust the
feet of the appliance (29) using the spanner
provided (30) as required�
29
30
4
5

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8. Installation
8.1 Water connections
WARNING
Risk of infection due to backflow of
contaminated liquid into the drinking
water
• When connecting to the public water
supply, make sure that a suitable
check valve in accordance with EN
1717 is installed� Local regulations
must be complied with since the imple-
mentation of the relevant European
standard EN 1717 varies from country
to country�
• Check that clean, clear water flows from the
water tap (27)�
When installing for the first time make
sure the connection is allowed to flow
and rinse first!
• Because of great regional differences in the
water quality a fine filter (32) must be fitted
between the water tap (27) and water hose
(34)�
The fine filter (32) protects the flow regu-
lator in the water intake valve of the ap-
pliance from becoming dirty�
• Turn off the water tap (27)�
• Connect the 90° elbow piece (33) to the water
tap (27), mounting the fine filter (32) (arrow in
direction of flow) and the double nipple piece
(31) at the same time�
Check that the coarse filter (34a) and
both seals (34b) are present in the
threaded fitting of the water hose (34)�
• Connect the water hose (34) to the water in-
flow (35) of the appliance (threaded pipe fitting
with coarse filter) and connect to double nipp-
le piece (31)�
34
35
36
27
31
32
33
34
34a
34b
6
7
8

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40
41
39
43
41
39
Fixer
max. 3 cm
37
38
25
8.2 Waste water connections
• The waste water connection must include a
siphon trap�
• Lay the waste water hose (36) with a steady
incline to the siphon trap:
Shorten the hose to an appropriate length
When laying out the waste water
hoses the following must be careful-
ly observed:
- avoid sagging hoses!
Avoid squeezing or reducing the
pressure on hose!
• The external ends of the hoses should be
coated with UHU-Plast�
• Screw the screw socket (37) onto the hose
and fit to siphon trap muff (25) using a hose
clamp (38)�
• Secure the waste water hose using hose
clamp, screws and rawlplugs�
8.3 Waste water hose connection
from developer and fixer
• Place the 10l-collector tanks (39) for develo-
per (black level indicator marker) and fixer (red
level indicator marker) below the appliance in
a clearly visible position and free from the
possibility of tilting�
• Lay hoses (40) with constant incline
• Shorten the hoses to the correct length�
• Feed the hose for developer (black markings)
into the black cover (41)�
• Screw the cover (41) of the developer collec-
tor (39) on tightly�
• Fix the hose for fixer (red markings) in the
same way to the fixer collector�
Empty the collector vessel when the
level indicator marker (43) shows
full - danger of overspill! Disposal
of the developer and fixer requires
observance of all regional rules and
regulations! In Germany and many
other countries, x-ray chemicals
must be disposed of separate-
ly as special waste: check local
regulations.
9
10
11

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44
45
8
8
6
5
3
90
90
9. Start-up and first use
9.1 Clean unit
• Remove the cover�
• Remove the floating covers to developer and
fixer baths�
• Open the green catch (44) and locking
devices (45)�
• Swing the dryer roller set (8) towards the
back�
• Extract the roller sets for water (6) and develo-
per / fixer (5)�
• Swing the display (90) upwards�
• The display can also be lifted upwards and
then laid to the side on the left�
• Extract the roller set film insertion (3)�
12
13
14

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61
22
10. Electrical connection
The unit is set up for a supply volta-
ge of 230 V (see model identification
plate). Before connection of the
main power cable it is important to
check whether the required voltage
is available, otherwise the appli-
ance can be damaged. Use the Dürr
mains cable supplied. The unit must
only be used in completely closed
state - with all side panels and co-
ver fitted and closed - before con-
necting to the mains power supply.
• Connect the power plug (61) into the appli-
ance and into the main power socket�
• Press the lever to the side and remove the lif-
ting bath (22)�
• Clean the roller sets, lifting bath and tanks
using a damp sponge�
"Preparation of chemicals "
and
"Insertion of roller sets"
see sections 15.1.2 and 15.2.1
15
16

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11. Circuit diagram
11.1 PCB (main board) operating functions
11.2 PCB (main board) control functions
(see also parts 23 A and 23 B under section 7)
U1Light barrier to cover
U2 Light barrier to cover U3 Light barrier lifting bath U4 Light barrier to film insertion slot R1 Temperature sensor "Bath temperature" X5 Level indicator sensor "Water" M1 Speed sensor
12.1 12.2
23 B
23 A

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M1Roller drive motor
M2 Ventilation fan
M3 Rotary pump
M4 Lifting bath motor
R1 Bath heating
R2 Dryer heater
Y1 Water intake valve
X1/X2 Power supply
X3 Regeneration unit
11.3 PCB (main board)
power functions 230V
(see also part 23 C under section 7)
12.3
23 C

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12. Start-up and first use
The developer unit XR 24 Pro has 3 different
settings for the processing time, and is factory
set at the following values�
Intraoral films 6 min (program INTRA)
Extraoral films 4 min (program EXTRA)
Endodontal films 3:15 min (program ENDO)
Please note: X-ray films with such short proces-
sing times are not suitable for archiving�
-Developer / fixer bath temperatures 28°C
-Dryer performance 30%
When using other film types requiring different
processing times and dryer performance the the
values will need to be changed as appropriate�
Refer to the film list, section 14�5�
For a program overview refer to the section
"Usage"
The unit must only be used in com-
pletely closed state - with all side
panels and cover fitted and closed
- before connecting to the mains
power supply.
Every time the unit is switched on at the
power switch then program "INTRA" is
started, i�e� after the unit is switched off
there is an automatic reset to "INTRA"�
Guidance on using the unit and the
display for the operator can be found
in section "Usage", section 14�
A complete description of the service
operation can be found on the section
covering Maintenance 18�6�
The developer unit must never be
operated when the roller set is not
present!
Where the roller sets are not inserted
then there is pressure being exerted
vertically upwards on the developer
and fixer fluids and could splash out�
Chemicals irritate eyes and skin
and there is the danger of serious
eye damage.
Without developer and fixer roller sets there can
be no return of chemicals to the ap-
propriate containers�
There is also the danger of the
chemicals mixing.
The developer unit must never be operated
without fluids (chemicals, water)
as this can lead to the heating
breaking down.