Stephan Staxel 1.5, Staxel 3.5 User manual

STEPHAN

O2-AIR-ENERGY SUPPLY MODULE

STAXEL 1,5 3,5

°

Modul für Intensiv-Therapie

BETIEBSTUNDENZÄHLER

LÜFTER

SERVICE MANUAL

RÜCKWAND

F. STEPHAN GmbH · Medizintechnik · D-56412 Gackenbach · Kirchstr. 19 · Tel. [phone] · Fax [phone] · [e-mail] ·

www.stephan-gmbh.com

STAXEL O2 and AIR Service Manual

Table of contents

2. TECHNICAL DIMENSIONS

4

3.1 Production of oxygen 5

3.2 Production of compressed air 5

3.3 Generation of vacuum 6

3.4 Construction 6

4. INSTALLATION AND STARTUP 7

4.1 Environmental conditions 7

4.2 Startup 8

5. CONTROL – AND DISPLAY ELEMENTS 9

6. CONNECTIONS FOR OXYGEN, COMPRESSED AIR AND VACUUM10

7. TECHNICAL DESCRIPTION 11

7.1 Description of system 11

7.2 Schematic representation 12

7.3 Switching attitude of the valve unit 13

8. TECHNICAL DETAILS 15

9. PERFORMANCE DATA OF STAXEL 16

10. ERROR DETECTION SYSTEM 17

11. MAINTENANCE 18

12. GUARANTEE 18

13. SERVICE 19

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STAXEL O2 and AIR Service Manual

13.1 Power supply 19

13.2 Wiring diagram, STAXEL bottom part 20

13.3 Wiring diagram V2A – cover of STAXEL 21

13.4 Adjustment of the adsorber containers 22

13.5 Technical details 25

13.5.1 Exchanging the bacteria filter and the intake filter mat (ambient air filter) 25

13.5.2. Removing the top part, the rear panel and the side covers 26

13.5.3 Removing the adsorber containers 27

13.5.4. Removing the compressed-air-reservoir 29

13.5.5. Removing the compressors 30

13.5.6. Exchanging the outlet filter 30

14. STAXEL SET OF SPARE PARTS FOR AN OPERATING PERIOD OF
2 YEARS

31

15. MODULES WITH PRODUCT NUMBERS 32

15.1 Pressure reservoir complete 32

15.1 O2 – reservoir, complete 33

15.3. O2 pressure reducer STAXEL, complete 34

15.4 Terminal block STAXEL, bottom part 35

15.5 Cover STAXEL, bottom part 36

15.6 Housing lid STAXEL 37

15.7. Adsorber unit, complete 38

15.8. Adsorber manifold, complete 39

15.9 Compressor unit, pre-assembled 40

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STAXEL O2 and AIR Service Manual

1. General notice

The STEPHAN – S T A X E L - unit serves for the production of oxygen and compressed air as

well as for the production of vacuum and is primarily designed for the operation of appliances for

pediatrics and anaesthesia.

It continuously produces oxygen from the ambient atmosphere and thus offers an economocal

alternative to the supply of oxygen from cylinders or the supply with liquid oxygen.

The STAXEL – basic unit is available for diverse applications:

STEPHAN STAXEL „PEDIATRICS“ ( for 2 respirators)

STEPHAN STAXEL „ANAESTHESIA“ WITH RESPIRATOR

Note: Upon request or order also other combinations are available

The STAXEL can be mounted on a service carriage and thus offers the greatest possible mobility

and flexibility.

It is made from stainless steel and therefore extremely resistant against weathering and easy to

keep in hygienic condition.

The STAXEL is available with a number of different shelves, brackets for appliances and

appliances rails for attaching instruments, holding devices or vessels.

Furthermore, four earthed sockets (Schuko) (230 V) are provided on the rear panel, where diverse

other appliances can be connected.

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STAXEL O2 and AIR Service Manual

2. Technical dimensions

Modul für Intensiv-Therapie

BETIEBSTUNDENZÄHLER

LÜFTER

VAC O2 AIR

RÜCKWAND

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STAXEL O2 and AIR Service Manual

3. Construction and description of performance

3.1 Production of oxygen

The production of oxygen is based upon the adsorption effect of molecular sieves. For this

purpose, air which has been compressed by compressors is blown through two containers, which

are filled with molecular sieves.

Since the molecules of oxygen are smaller than these of nitrogen, the oxygen can pass the sieve

unimpeded, whereas the nitrogen is aborbed completely by the molecular sieve. Thus, air enriched

with oxygen is obtained at the outlet of the container.

Concentration of oxygen is approximately 95 % ( with an extraction of 5 litres / min). The

remaining 5 % are inert gases contained in the normal ambient atmosphere like argon, neon,

xenon etc.

Of the two containers filled with molecular sieves, only one at a time takes part in the production

of oxygen.

Prior to the first container being completely saturated with nitrogen, changeover to the second

container, which now performs the enrichment of air with oxygen, takes place.

While the second container is in operation, the first one is cleaned, using a portion of the produced

oxygen and can continue with the enrichment with oxygen, when the second container is saturated

with nitrogen. This process is cyclic and continuous.

3.2 Production of compressed air

Compressed air is produced by means of the two compressors, which also compress the ambient

air required for the production of oxygen. The compressed air is collected in a compressed air

reservoir and is now available for the production of oxygen as well as for use as medicinal

compressed air. The ambient air is hereby conducted through an intake filter and a bacteria filter

and then compressed in the compressors, which both operate free of oil. Thus the production of

compressed air always runs in parallel with the production of oxygen. The moment the STAXEL

is switched on , it produces compressed air as well as oxygen.

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STAXEL O2 and AIR Service Manual

3.3 Generation of vacuum

Vacuum is generated by means of a vacuum pump, which is additionally installed in the

STAXEL.

In parallel to the production of O2 and AIR, this vacuum pump can be switched on and off

separately. Vacuum pressure is infinitely adjustable from – 0,1 to – 0,6 bar by means of a rotary

knob.

3.4 Construction

The entire supply module is mounted in a sound-insulated twofold-steel housing, all rotating

components, like compressor or fans are mounted oscillation-attenuated. The escaping exhaust air

is evacuated via a noise-reducing filter.

The front panel of the appliance contains the displays of operating pressure for O2, AIR and VAC

as well as a hours-run-meter to indicate the scheduled intervals for maintenance and servicing

(exchange of filters etc).

The entire module is mounted onto a sturdy undercarriage with an appropriate holding rail, so that

all STEPHAN respirators as well as reanimators (pediatrics respirator F 150 and HF 300 SIMV)

can be used. The respirators can easily be detached from the unit and attached to a wall rail system

or to the incubator.

Attention:

The unit must not be operated without micro filter !!

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STAXEL O2 and AIR Service Manual

4. Installation and startup

4.1 Environmental conditions

The STEPHAN S T A X E L is intended for installation in dry rooms without risk of splash

water or water drops. Humid or wet environment can seriously impair the reliability of the unit.

Special care has to be taken to avoid placing containers filled with water or similar objects in the

near vicinity.

The ambient temperature should in no case exceed+ 40° C.

With a prevailing relative air humidity it is recommended to operate the unit only in air-

conditioned rooms.

The air – intake grids at the rear of the unit must not be covered or obstructed with any objects.

Distance from the rear of the unit to the wall should be at least 10 cm.

The STAXEL must not be operated in rooms, where an explosion hazard exists !!

The STAXEL must not be operated in the vicinity of open fire or red hot objects because of the

increased explosion hazard, which exists on account of the ambient air being enriched with

oxygen of high purity.

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STAXEL O2 and AIR Service Manual

4.2 Startup

First the STAXEL is connected to the mains supply (socket).

The STAXEL has two mains switches, one mains switch for the production of O2 and AIR and a

second one for the generation of vacuum.

By means of the mains switch ′O2 and AIR′ the unit is switched ON and OFF for the production

of oxygen and compressed air.

Immediately after switching it on, the „STAXEL“ starts to produce oxygen and compressed air.

The respective pressure gauges on the front panel, blue for oxygen and yellow for compressed air,

indicate the pressure at the respective outlets.

The typical values for oxygen and compressed air are 1 bar.

By means of the mains switch ′VAC′ the unit is switched ON and OFF for the generation of

vacuum.

Immediately after switching it on, the „Staxel“ starts to generate vacuum.

The pressure gauge at the front panel, white for vacuum, indicates the pressure at the respective

outlet.

The typical value for vacuum is – 0,5 bar.

On both sides of the unit one connection each for oxygen and compressed air is provided.

An additional connection for vacuum is provided on the right side of the unit.

During normal operation always one pair of connections ( O2 and AIR ) is used. If necessary, the

„spare pair of connections“ can be used in parallel for connecting a second respirator or incubator.

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STAXEL O2 and AIR Service Manual

5. Control – and display elements

MWZ

L▄FTER

1

Modul f³r Intensiv-Therapie

1.1 1.2 1.3

BETIEBSTUNDENZ─HLER

1.4 1.5 1.6 1.7

1 Mains switch ON / OFF for O2 and AIR

1.1 Hours – run – meter for the production of O2 and AIR

1.2 Pressure gauge for indication of O2 – pressure

22.12.2

2.3 2.4

1.3 Pressure gauge for indication of AIR – pressure

1.4 Visual alarm for over – heating

1.5 Visual alarm for failure of electronics or switching valves

1.6 Fuse for O2 - and AIR – production

1.7 Fuse for O2 – and AIR – production

2 Mains switch ON / OFF for VAC

2.1 Rotary knob for regulating the vacuum pressure

2.2 Pressure gauge for indication of vacuum pressure

2.3 Fuse for generation of VAC

2.4 Fuse for generation of VAC

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STAXEL O2 and AIR Service Manual

6. Connections for oxygen, compressed air and vacuum

Outlet compressed air

Outlet oxygen

Outlet vacuum

VAC O2 AIR

Strip of sockets with connecting cable

Outlets for O2 and AIR are located on both sides of the STAXEL. The connections are quick-

coupling and are are interlocked automatically after plugging in. To unplug them, the unlocking

pin on the top of the connection must be depressed.

The outlet for vacuum is located at the right side. The connection consists of a 1/8“ female hose

connector. The hose leading to the suction unit is slipped on.

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STAXEL O2 and AIR Service Manual

7. Technical description

7.1 Description of system

Ambient air is taken in via a microfilter, led through a silencer inlet and finally compressed in the

compressors 1 + 2. The compressed air is then conducted over a condenser and cooled, before it

is collected in a pressure compensation reservoir. This reservoir is provided with an exhaust valve

for condensate water, which briefly opens every 45 minutes and blows the condensate water out.

The compressed air reservoir is continuously filled with compressed air from the compressors.

The AIR - outlets are supplied with compressed air from this reservoir. The output pressure is

limited to 1 bar by means of a pressure reducing valve. The compressors operate free of oil, thus

the provided air is medicinal compressed air.

The compressed air from the pressure compensation reservoir also supplies the two adsorber

containers A + B via a valve unit. The valve unit consists of a 5 / 2 – way valve, which is

electronically controlled. The valve is constructed in such a way, that only one adsorber at a time

takes part in the production of oxygen, while the other one is being scavenged and cleaned.

The compressed air is conducted through the adsorber containers.

The adsorber containers are filled with a special granulate, which works like a molecular sieve.

On account of the different sizes of molecules, the nitrogen contained in the air is physically

adsorbed, while oxygen and portions of inert gases are not adsorbed and form the residual gas

atmosphere, which is led into an O2 – resrevoir.

Through a nozzle and a scavenging valve, which are located at the outlet of the adsorber

containers, the adsorber not participating in the production of oxygen at this moment is blown

through with a portion of the produced oxygen and the nitrogen is flushed into the atmosphere.

This procedure is periodically repeated, whereby two adsorber containers are used alternatingly to

increase efficiency. The two adsorber containers are interlocked against one another via two back

pressure valves so that in the course of changing over to the adsorber container, which participates

in the production of oxygen the produced oxygen is not completely blown through the adsorber

container that has to be cleaned, but flows into the O2 – resrevoir.

The O2-outlets are supplied with oxygen from the reservoir via an additional microfilter. Pressure

at the outlet is limited to 1 bar by means of a pressure reducer.

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STAXEL O2 and AIR Service Manual

7.2 Schematic representation

Microfilter

Pressure reducer

Absorber A

O2 reservoir

Gerõusch­Dõmpfer
Ausla▀

O2 outlet

Back pressure valve

Scavenging valve

Nozzle

Sintered filter

Absorber B

Valve unit

Pressure compensating
reservoir

Exhaust valve for
condensate water

AIR outlet

Fan

Microfilter

compressor 1

compressor 2

Silencer intake

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