Kröber O2 Vers. 4.0 Manual

Technical information
Kröber O2

Kröber O2
2
© Kröber Medizintechnik GmbH
Salzheck 4
D-56332 Dieblich
Germany
Tel.: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: www.kroeber.de
TD070109 R5
23.12.2020

Kröber O2
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Table of contents
1. Preliminary Remark......................................................................................................... 5
1.1 General.........................................................................................................................5
1.2 Warranty.......................................................................................................................5
1.3 Device identification......................................................................................................6
2. Structure........................................................................................................................... 7
2.1 Version with Camozzi functional unit.............................................................................7
2.2 Version with SMC functional unit ..................................................................................8
3. Service work..................................................................................................................... 9
3.1 Opening the Kröber O2.................................................................................................9
3.2 Closing the Kröber O2 ................................................................................................10
3.3 The functional units.....................................................................................................11
3.3.1 The Camozzi functional unit .................................................................................11
3.3.2 Removing the Camozzi functional unit..................................................................12
3.3.3 Installation of the Camozzi functional unit.............................................................14
3.3.4 The SMC functional unit .......................................................................................18
3.3.5 Removing the SMC functional unit........................................................................19
3.3.6 Installation of the SMC functional unit...................................................................22
3.3.7 Replacing the molecular sieves............................................................................24
3.4 Control board..............................................................................................................27
3.4.1 Removal of the control board................................................................................28
3.4.2 Installation of the control board.............................................................................33
3.5 The fan.......................................................................................................................37
3.5.1 The fan.................................................................................................................37
3.5.1.1 Fan removal...................................................................................................37
3.5.1.2 Fan installation...............................................................................................40
3.6 The compressor..........................................................................................................42
3.6.1 The compressor model Gardner Denver...............................................................42
3.6.1.1 Compressor removal......................................................................................42
3.6.1.2 Compressor installation..................................................................................45
3.6.2 The compressor model Tecwell (or GDT 2380)....................................................48
3.6.2.1 Compressor removal......................................................................................48
3.6.2.2 Compressor installation..................................................................................51
3.7 The power cord...........................................................................................................52

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3.7.1 Removing the mains power cord...........................................................................52
3.7.2 Installation of the mains power cable....................................................................53
4. Maintenance...................................................................................................................54
4.1 Safety check, semi-annually .......................................................................................54
4.2 Filter change...............................................................................................................55
4.2.1 Coarse dust filter ..................................................................................................55
4.2.2 Device input filter..................................................................................................55
4.2.3 Device output filter (bacteria filter) ........................................................................56
5. Processing recommendations......................................................................................58
5.1 without change of patient............................................................................................58
5.2 With patient change....................................................................................................58
6. Functional description...................................................................................................59
6.1 General.......................................................................................................................59
6.2 Control board..............................................................................................................60
6.3 Integrated protective measures (safety concept according to MOPP).........................61
6.4 Pneumatic diagram.....................................................................................................63
6.4.1 with Camozzi functional unit .................................................................................63
6.4.2 with SMC functional unit .......................................................................................63
7. Abnormal conditions and their correction...................................................................64
7.1 Alarm conditions.........................................................................................................64
8. PC Service Program.......................................................................................................68
8.1 Installation ..................................................................................................................68
8.2 Usage.........................................................................................................................69
8.3 Printable Report..........................................................................................................71
8.4 Flight recorder.............................................................................................................72
9. Appendix ........................................................................................................................73
9.1 Spare parts list............................................................................................................73
9.2 EMC Guidelines..........................................................................................................88
9.2.1 Electromagnetic compatibility, interference emission............................................88
9.2.2 Electromagnetic compatibility, immunity ...............................................................89
9.2.3 Recommended protective distances.....................................................................92
9.3 Explanation of symbols...............................................................................................93

Kröber O2
Preliminary Remark
5
1. Preliminary Remark
1.1 General
This Technical Information describes the Kröber O2 oxygen concentrator.
It only applies in conjunction with the Kröber O2 Instructions for Use.
The Kröber O2 is equipped with a humidifier on the unit side as standard. If desired, a
humidifier close to the patient can also be selected as an option
The following minimum performance data apply to the Kröber O2 oxygen concentrator:
minimum O2 concentration ± 3%
until 2016-12
from 2017-01
until 2018-06
from 2018-07
until 2019-11
as of 2019-11
0.1 - 4.0 l/min. 95%
4.0 - 5.0 l/min. 85%
5.0 - 6.0 l/min.75%
0.1 - 4.0 l/min. 95%
4,0 - 5,0 l/min. 90%
5.0 - 6.0 l/min.85%
0.1 - 4.0 l/min. 95%
4.0 - 5.0 l/min. 93%
5.0 - 6.0 l/min.90%
0.1 - 5.0 l/min. 93%
5.0 - 6.0 l/min.90%
Oxygen concentration measurement is performed under the following operating conditions:
Operating temperature: +5 to +40 °C
Relative humidity: 15% - 93% (r.H. non-condensing)
Air pressure: 700 to 1060 mbar
These values must be measured and documented during maintenance.
Required test equipment: Oxygen meter
Flowmeter measuring range 0-6 l/min
The setting values for various device parameters specified in this Technical Information are
guide values and are used to optimize the device to the specified performance data.
The data read from the microprocessor are evaluation aids for the technician to analyze
causes of any performance deviations.
1.2 Warranty
Deviating from our General Terms and Conditions, we grant an extended 30,000 operating
hour warranty for our Kröber O2 oxygen concentrator for all functional parts (e.g.
compressor, control board, valve technology, etc.). The extended warranty is valid for a
maximum of 5 years from the date of purchase.
Excluded from the warranty are filters and zeolites, damage due to improper handling and
mechanical damage to parts (e.g. transport damage).
Our warranty services are limited to the free replacement of defective parts. The defective
components must be presented to us for inspection. We will not bear any costs for travel and

Kröber O2
Preliminary Remark
6
working hours incurred on site. If devices are sent to us free of charge for warranty repair, we
will also assume the labor costs for any warranty repairs.
1.3 Device identification
The year of manufacture of the Kröber O2 can be derived from the serial number. The silver
type plate is located on the rear side above the coarse dust filter and has the following format
Here YYMM is the coding for year and month, e.g. 1912 in 1019126749 means December
2019.
Note that the prefix CC can be two to four digits, e.g. 16T20021234 and S4OX20017253.

Kröber O2
Structure
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2. Structure
2.1 Version with Camozzi functional unit
In the opened device you can see the assemblies
a. Control board
b. Functional unit Camozzi
c. Compressor
d. Fan
and the components
e. Capacitor
f. Power cable

Kröber O2
Structure
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2.2 Version with SMC functional unit
In the opened device you can see the assemblies and components
a. Control board
b. Functional unit SMC
c. Power cable
d. Compressor
e. Capacitor
f. Fan

Kröber O2
Service work
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3. Service work
WARNING! Danger due to electric current!
Be sure to disconnect the power plug before opening the device.
After operation, increased surface temperatures may occur on components and
parts.
3.1 Opening the Kröber O2
WARNING! Danger due to electric current!
Be sure to disconnect the power plug before opening the device.
NOTE!
To simplify work on the Kröber O2, it is advisable to place the device on a clean
surface. Any humidifier that may be screwed on must be completely emptied or
dismantled.
2. Unscrew 5 screws (S1 to S5).
3. Carefully remove the housing cover.
4. Remove the blue service flap and store it separately.
a. Control board
b. Functional unit

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Service work
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3.2 Closing the Kröber O2
NOTE!
Closing the Kröber O2 is most easily done with a device placed on its side.
1. Carefully replace the gray
housing cover and ensure that
the cover is correctly latched.
2. Insert all housing screws; tighten
screws S4 and S5; tighten all
other screws lightly
3. Carefully insert the blue service
flap with the two lateral lugs into
the corresponding bearings in
the housing. To do this, stretch
the housing open a little.
4. Hand-tighten all five housing
screws.
5. Replace the coarse dust filter
cover on the rear of the Kröber
O2.

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Service work
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3.3 The functional units
3.3.1 The Camozzi functional unit
The Camozzi functional unit integrally includes the following components as a module:
•Molecular sieve 1 and 2
•Exhaust silencer
•Oxygen reservoir
•3 Valves
•Pressure reducer
If a component is defective, the entire unit must/should be replaced.

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Service work
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3.3.2 Removing the Camozzi functional unit
1. Disconnect the red connector of
the valve control line from the
control board.
2. Loosen the cable tie on the EMC
core with side cutters.
NOTE!
It is normal that a slight popping
noise may occur due to any
excess pressure still present in
the hose.
3. Press the edge of the plug-in
connection at the air inlet of the
functional unit down evenly and
pull out the hose.

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Service work
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4. Press the edge of the plug-in
connection on the gas outlet of
the functional unit evenly and
pull out the hose.
5. Lift the functional unit halfway
straight up
6. Press the edge of the push-in
connector on the pressure outlet
for the pressure sensor evenly
and pull out the hose.
7. Remove the functional unit
completely.

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Service work
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3.3.3 Installation of the Camozzi functional unit
1. Remove the three protective caps
from the inputs and outputs of the
functional unit.
2. Insert the plug-in hose for the
pressure sensor into the
connection on the functional unit
as far as it will go.
3. Carefully insert the functional unit
into the shaft.

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Service work
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4. When inserting, make sure that
the exhaust silencer is correctly
inserted into the corresponding
housing gap.
5. In the correct end position, the
discharge silencer is directly in
front of the compressor.
6. In the correct end position, the
head of the functional unit is
caught by a stop (see circle).

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Service work
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7. Reconnect the plug-in hose of the
product gas outlet as far as it will
go.
8. Insert the plug-in hose into the air
inlet of the functional unit as far
as it will go.
9. Attach EMC core to cooling coil
output hose with a cable tie.

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Service work
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10. Plug the red connector of the
valve control line onto the
connector of the control board.
Observe the polarity. The pin
must point to the black tub
connector.
11. Push the plug on with feeling as
far as it will go.
12. Check tubing and cabling for
correct, pinch-free routing

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Service work
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3.3.4 The SMC functional unit
The SMC functional unit contains - discretely interconnected - the following components:
•Molecular sieve right and left
•the 4-fold valve block
•the flush valve

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Service work
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3.3.5 Removing the SMC functional unit
1. The following tools are required
for simple removal:
•Combination pliers
•Telephone pliers with curved
tips
2. Pull off both the 8-pin and the 2-
pin connector downwards.
Moderate force is required for
this.
NOTE!
It is normal that a slight popping
noise may occur due to any
excess pressure still present in
the hose.
3. Pull the O2 output hose of the
functional unit off the L-
connector by hand.

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Service work
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4. Compress the upper and lower
clamps on the compressed air
inlet and outlet of the 4-way
valve block with a pair of
combination pliers and slide
them to the right onto the hose.
Thus release the locking device.
5. Grasp both hoses one after the
other with the bent telephone
pliers and lever them to the right
against the housing.
6. This disconnects both hoses
from the 4-way valve block.