Elektrotechnik Schabus GX-D500P User manual

OPERATING INSTRUCTIONS
www.elektrotechnik-schabus.de
CO2 GAS ALARM GX-D500P
Prof. CO2 warning device for
Carbon dioxide from technical systems
item no. 300263

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Thank you for your Trust!
In order to always guarantee optimal function and readiness for perfor-
mance for the product and to ensure your personal safety, we have one
request of you: Read these instructions for use thoroughly before assem-
bly and rst use and, above all, follow the safety instructions!
The user manual is part of this product. Keep these for future reference!
important note:
This is a translation from the German original, we are not liable for errors in the automatic translation.
1. Scope of Delivery
⋅ 1 GX-D500P CO2 warning device
⋅ 2 meter hose (item no. 21002)
⋅ 1 dust lter (item no. 300259)
⋅ 2 large and one small PG gland
⋅ Mounting material (4 screws + dowels, 2 cable ties, 2 screwdrivers)
⋅ 1 USB calibration adapter cable (optionally available, item no. 200340)
2. Safety Instructions
2.1 General
Before assembling or starting up the device, read the instructions for use
carefully.
Installation must be carried out by a qualied specialist.
Packaging material is not a child‘s toy. Keep this away from children.
2.2 Environmental conditions
The standards used to evaluate the product specify limit values for
use in residential, business and commercial areas as well as in small
businesses, which means that the use of the product is intended for this
operating environment:
⋅Residential buildings/areas such as houses, apartments, rooms, etc.
Retail areas such as shops, wholesale markets, etc.
⋅Rooms of small businesses such as workshops, service centers etc. as
well as all dry indoor areas

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⋅Rooms in commercial establishments with household-like use such
as kitchens, pantries, bars ...
⋅All locations are characterized by being connected to the public low-
voltage network.
3. Intended Use
The GAS ALARM GX-D500P is a carbon dioxide alarm device for resi-
dential and similar use with an integrated NDIR sensor. An LCD display
provides constant information about the operating status and the roun-
ded percentage of the CO2 concentration measured in the monitored
room, which is either thermally demanding or heavily loaded with dust.
To do this, the warning device is connected via a hose to the room to be
monitored (e.g. a cold store) in which the warning device itself cannot be
operated.
The alarm is acoustically and optically, at the same time a potential-free
relay is switched, e.g. to activate forced ventilation or to block a gas line
with a magnetic shut-off valve so that no further CO2 can escape in the
event of a defect in the system. Another relay switches in the event of
technical faults that the warning device detects itself. The CO2 sensor
evaluation, measuring cell and software were developed entirely in
Germany by Elektrotechnik Schabus. The evaluation and software were
subjected to a complex full test by TÜV Süd as part of the development
of a CO warning device, and the software was certied for safety and
stability. The device for permanent installation must not be used in
potentially explosive areas.
The device is not approved for any other use than that described above.

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4. Assembly Instructions
The GAS ALARM GX-D500P may only be installed on a wall in
dry indoor areas. The „middle height“ mounting position is cho-
sen so that the display is easy to read when standing.
This also ensures that the warning device functions correctly.
4.1 wall mounting GX-D500P
For wall mounting, the four housing screws must be loosened. Then the
front panel is removed and, if necessary, the ribbon cable is pulled off
the connector. The bottom shell of the housing can now be mounted on
a wall (mounting material is included). Wall mounting is important for
the reliable functioning of the hose suction.
Important! The connection cables that lead to the CO2 detector
must be permanently installed as surface-mounted cables.
4.2 Pin assignment relay
When connecting accessories to the potential-free relay, it must be
noted that the switching current of 5 amperes must never be exceeded.
The limits are for
⋅Alarm relay Re1 (left): 250 volts AC / 5 A (3 A) / 1250 VA (750 W)
⋅Fault relay Re2 (right): 60 volts DC / 5 A / 300 W
⋅Relay status in monitoring mode:
⋅The relay is “picked up” (NO contact closed/NC contact open)
⋅Relay status in alarm or fault mode:
⋅The relay “drops out” (NO contact open/NC contact closed)

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4.3 terminals
L, N and PE - clamps are connected 2 each to facilitate bridges to the relay,
relay contacts: G = common contact, Ö = NC / opener, S = NO / closer
4.4 Laying the hose to thermally demanding rooms
First of all and valid for all applications:
⋅The warning device must always be positioned over the hose inlet
⋅Clever laying will denitely rule out the formation of sacks
⋅The hose length between the CO2 warning device and the wall outlet is
at least 1000mm
⋅Vertical laying is optimal, horizontal laying is not possible
⋅In the case of a lateral offset, the minimum incline is 15°, better 20°,
see graphic
⋅The maximum hose length is 4 meters, the laying radius at least 70 mm
⋅Of course, the hose must not be kinked or squeezed
⋅the hose is regularly checked for damage and dirt
Re1 Re2
S4 G4 Ö4 S3 G3 Ö3 S2 G2 Ö2 S1 G1 Ö1
NO 5 A / NC 3 A
230 VAC
SGÖ
Relais

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Depending on the position of the
hole for the hose and the place
where the warning device is at-
tached, the hose can be shortened
accordingly.
The minimum hose length of
1000mm between outlet (hole) and
outlet (GX-D500P) must be obser-
ved in hot/cold rooms.
For shortening, the thickness of the
wall and an overhang of the hose
of 5 to 10 mm are added, in the
drawing on the right it is e.g. at least 1040 mm.
(In rooms to be monitored with dust exposure, signicantly more hose
is required „inside“ to connect the dust lter with the minimum laying
radius.)
Vertical hose routing is ideal, with a lateral offset, a minimum incline
of 15° - 20° must be observed. Sac formation must be avoided at all
costs! The warning device cannot detect accumulations of condensed
water and other deposits that impair the diffusion of the medium to be
monitored into the device and may lead to a delayed alarm response, in
the worst case to failure of the monitoring. The user regularly checks the
GX-D500P GX-D500P GX-D500P

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cleanliness of the hose and, if necessary, carries out cleaning measu-
res or exchanges the hose for an equivalent one. We only recommend
thick-walled types made of silicone, e.g. Schabus item no. 21002. If
other types or hoses with a total length of more than 4 meters are used,
the response time can be signicantly delayed. Hose inlet close to the
ground is optimal with CO2.
4.5 Hose routing and attachment
If the GX-D500P is mounted vertically above the exit hole, there is no
need to attach or route the hose, unless it is a public space.
If there is likely to be public trafc, we recommend covering it with a
commercially available cable duct.
When mounting with a lateral offset, the use of empty pipes or hose
clamps made of plastic is recommended.
The specialist who carries out the installation is responsible for nding
the appropriate attachment for the respective environment and thus
contributes to the intended function of the warning device within the
framework of the specications.
Since the hose must not be squeezed or kinked, the formation of loops
cannot be avoided when adhering to the smallest laying radius of 70
mm.
outside
insideInlet

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4.6 Using the dust lter
In dry interior rooms to be monitored with high levels of dust, e.g. wood
workshop, dry ice blasting, please attach the enclosed dust lter (item
no. 300259) to the hose inlet and x it with a cable tie.
The dust lter can be easily attached to the wall using a screw and dowel
in the screw hole of the lter. Please pay attention to the smallest laying
radius of 70 mm, however, if the warning device and dust lter are in the
same room, the hose may also be signicantly shorter than would be
necessary in thermally demanding rooms. Minimum lengths do not have
to be adhered to in rooms with a normal temperature (10°C ... 40°C), see
also functional area in the technical data, page 22.
The dust lter must not be used in thermally demanding, i.e. particularly
warm or cold, environments. The combination of extraction from a room
and the use of the dust lter requires at least similarly tempered rooms
in which people (can) stay permanently.
Like the GX-D500P itself, the dust lter is only permanently suitable for
temperatures from +10°C to +50°C.
Blow regularly to remove dust from the dust lter
and avoid moisture/moisture on the lter.
The lter should be replaced after a year of operation.
5. COMMISSIONING / FUNCTIONAL TEST / ALARM (Re1)
An electrical function test is carried out for a few seconds when the
mains voltage is applied, after which the warning system is in operation
immediately, monitors the room and, apart from the regular calibrations,
can remain in continuous operation for years. If the green LED lights up
alone, the warning system is ok and ready for use.
Please note: Even if the power failure is brief, the functional test will be
restarted.

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For your safety, we recommend that you regularly check that the
acoustic alarm device is working properly using the test button!
All three LEDs light up and the two relays Re1 and Re2 drop out.
5.1 Alarm
The alarm when the alarm threshold is reached is given with a loud pe-
netrating tone from a piezo sounder, the display lighting and the red LED
ashing, and the alarm relay Re1 dropping out.
You acknowledge the acoustic alarm with the test/reset button. If the
ventilation measures initiated immediately have not reduced the CO2
concentration value signicantly, at least below 30,000 ppm / 3.0%, the
alarm cannot be switched off.
5.2 Alarm thresholds and delay times
The technical guidelines for beverage dispensing systems stipulate that
a so-called pre-alarm is triggered from 1.5% CO2 in the ambient air. This
is shown as such on the display and the alarm device whistles twice,
each with a 5-second pause. The alarm relay Re1 does not switch here
yet.
At 3% CO2, the main alarm sounds, the alarm device beeps for a long
time with short pauses, the alarm relay Re1 switches (drops out), the red
LED and the display lighting ash and the display shows „Alarm!“. The
TEST/RESET button only mutes the acoustic alarm tone, the alarm mode
remains.
Alarm delay times are not specied by the software, a natural delay
results from the length of the hose and the response time of the NDIR
sensor. To ensure a reaction within 3-4 minutes, the hose should not be
longer than 4 meters, shorter is always better.
►If the CO2 concentration falls below the alarm threshold, the device
resets itself.

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5.3 Behavior in the event of an alarm
Ventilate the room and ensure that no further carbon dioxide can escape
by switching off/blocking the CO2 source. Inform other people and ask
them to leave the room.
5.3.1 Keep calm and open all doors and windows, nish all use of
incinerators. Provide fresh air!
5.3.2 If the alarm persists or occurs again, leave the building and
leave all windows and doors open. Make sure everyone is
warned in the house.
5.3.3 Get medical help for anyone showing symptoms of carbon
dioxide poisoning and point out that inhalation of carbon
dioxide is suspected.
5.3.4 If necessary, dial the emergency number so that the source of
the CO2 emissions can be identied and eliminated if you are
not aware of it.
5.3.5 Do not put the CO2 system back into operation until you
qualied person and released for use again.
6. Self-Tests and Technical Faults (Re2)
A built-in intelligence (32-bit µController) constantly monitors the system
at approx 300 points in hardware and software, several temperatures,
voltages and currents are measured and compensated, some of the
results for internal long-term tests are saved, offset against each other
and some of them are shown on the display.
In addition, the system carries out regular tests on the sensor element. If
the program nds the test result to be “good”, you won’t notice anything
from all the self-tests. However, if the result is rated „not good“, the
system restarts up to three times, repeats the measurements and then
decides whether an error message is issued.

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6.1 Notication of a technical fault
Disturbances can have many causes and different effects. In any case,
the fault relay Re2 drops out so that the building management system
/ building automation learns about it and any connected gas boiler is
switched off to be on the safe side. In addition, the yellow LED ashes
or lights up. An audible alarm of a short beep sounds every 10 to 30
seconds.
Keep pressing the service button until the display gives information
about the type of fault found, see also point 8, display page (05). The
term „error“ and a number appear. Please give this number to the techni-
cal support of Elektrotechnik Schabus, who will nd a solution together
with you. ([phone])
6.2 Interpretation of technical faults using the yellow LED
There are only a few faults that affect the measurement of the CO2
concentration and prevent the alarm from being raised in the event of
danger, but there are some faults that do not affect the warning system
and perhaps only indicate adverse environmental conditions and the
associated accelerated aging or, for example, mains voltage uctuations.
Flashing rhythms of the yellow LED come directly from the µController.
If this itself has a fault, the yellow LED will only light up continuously. A
controller problem can only be xed here at the plant in Stephanskirchen.
Contact us.
6.3 Eliminate simple technical faults
Press the test/reset button so that the fault relay Re2 picks up again.
Even if the error persists, relay Re1 remains energized. Relay 2 drops out
again only if there is another fault of the same or a different kind. Most
faults will correct themselves or if the warning device is unplugged, allo-
wed to cool for a period (about 15 minutes) and then restarted, in fresh
air if possible. If there is no improvement, please contact our technical
support, see 6.1 „error“.

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7. MAINTENANCE: Re-calibration by zero point adjustment
7.1 In principle, the CO2 warning device GX-D500P requires little main-
tenance. Dust it from time to time, using only dry cloths. Please do not
blow or suck on the hose.
7.2 Reset the zero point regularly or when necessary. Every sensor is
subject to a natural drift, the zero point (410 ppm) shifts upwards, the
sensors become more sensitive, and the alarm goes off more often and
earlier (intrinsically safe).
The spread of the specied alarm thresholds is retained.
In this context, „regularly“ means about every six months to a year and in
the case of increased demands or if necessary up to once a month. This
also depends on the other environmental conditions. The less often the
sensor is exposed to fresh or low-pollution air, e.g. below 800 ppm CO2,
the more frequently a zero point adjustment will be necessary.
7.3 Step-by-step instructions for zero point adjustment
This operation may only be carried out by an authorized and
be carried out by qualied personnel.
Observe the recognized safety rules and de-energize / turn off
the GX-D500P if possible.
7.3.1 This operation may
only be carried out by an
authorized and be carried
out by qualied personnel.
Observe the recognized safety
rules and de-energize the GX-
D500P if possible.

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7.3.2 Gently pry with a small screwdriver unplug the connector from the
sensor module. Switch at it a few times the sides around the connector
to get out as straight as possible. Never pull on the lines!
7.3.3 Unscrew the two screws from the sensor
module located in opposite corners. Attention:
The screws are very small (M2) and can easily
get lost.
7.3.4 The sensor module is now from the
main unit disconnected and you can take
it out. Now take the USB calibration ad-
apter cable and connect it to the sensor
module.
4 IR-LEDs
under the
membrane
module plug
module screw
module screw
calibration button
type label
NDIR-Sensor
sensor module
membrane

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7.3.5 Now connect the USB plug to a 5 volt USB power source, e.g AC ad-
apter, a laptop, a power bank, etc. and turn it on or connect it to the Power
grid near a window or equaloutside in the fresh air, e.g. on the terrace.
7.3.6 Obscure the membrane with your hand and see whether the IR
LEDs under the membrane rst glow very faintly red and then ash after
up to a minute. This ensures that the power supply is available and the
process has started correctly.
7.3.7 Bring the sensor to real ones now fresh air outside and leave him
alone there for at least 30 minutes, ideally on one shady place, at least
not in the blazing sun.
Walk away from the sensor around through your exhaled air not to falsify
the values. Provide an insulating base where the sensor may lie, take on
an aluminum window sill a piece of paper.
7.3.8 After the sensor has been fresh for >
30 minutes air, press and hold for at least
7 seconds the calibration button. A clock
which shows the seconds can be very
helpful here. The zero point calibration is
now complete.
7.3.9 Now reinstall the sensor module to the GX-D500P by doing the
reverse. Unplug the USB cable, unscrew its module with the two M2
screws on its place and connect it back to the bottom part of the war-
ning device. Take the cover, plug the ribbon cable rmly into its socket
and screw the cover to the base. The operating voltage can now be
switched on again. Document the calibration with date and time.

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8. Display Information
When starting up, i.e. applying mains voltage, the display welcomes you
with our name and the device type. After this time, the self-tests and
the initialization of the software and sensor start. The display shows for
about 3 minutes:
(00) Wait... Sensor Preparing
After that, the main screen will appear.
(01) CO2 : 0,07%* (correspond 700 ppm*)
Each time you press the SERVICE button, you get to the next display
until the main display appears again. If you stay on a display, the device
automatically switches back to the main display after a few minutes, or
if you press and hold the SERVICE button for a little longer.
page 1st line 2nd line*
(02) Product Type GX-D500
(03) Software Version Dx.xx see display
(04) On Time 0h 345sec
(05) Last Error 3
(06) CO2 Sensor 720 ppm
(07) CO2 at alarm 35300 ppm
(08) Alarm Counter 1
(09) Error Counter 6
(10) Starts Counter 13
(11) System Temp 17°C
(12) Chip Temp 36 °C
(13) Last Error at 0 h
(14) Max. Chip Temp 43 °C
(15) Sensor Range 50.000 ppm
(01) CO2 : 0,07%*
oder
(01) CO2 : 1,54%* pre alarm display pre alarm (>1,5%)
oder
(01) CO2 : 3,24%* Alarm! display alarm (>3,0%)
*) Specications are exemplary, if the second line is empty, you are back in the main display.

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9. Tecnical data
Operating voltage: 100 - 240 V AC / 50-60 Hz
Power consumption: max. 8 VA, depending on the operating status
Installation: only upright, surface-mounted, permanent instal-
lation
Sensor technology: internal infrared / NDIR sensor up to 50,000 ppm
Sensor resolution / accuracy: ± 100 ppm / ± 10% (of the displayed value)
Relay contact alarm Re1: 250 V~ AC / 5 A (oating changeover contact)
Relay contact fault Re2: 60 V= DC / 5 A (potential-free changeover con-
tact)
Sound pressure control unit: 85 dB(A) (100 cm distance)
Software version control unit: Dx.xx see display
Functional area for a short time: -15°C ... +50°C / 10 ... 90% rH, non-condensing
Functional range continuous operation: +10°C ... +50°C / 10 ... 90% rH, non-condensing
Sensor functional range: 0°C ... 50°C / 10 ... 90% rH, non-condensing
Functional range of monitored room: -30°C ... +70°C* / 10 ... 90% rH, non-condensing
Functional range of monitored room: -70°C ... +120°C** / 10 ... 90% rH, non-condensing
Service life of the sensor approx.: > 8 years, after 5 years Factory testing at ES
Degree of protection: IP20 standard / up to IP54 possible on request
Dimensions control unit: 80x160x55 mm (HxWxD)
*) extreme temperature range when the control unit is operated between +10°C and +50°C,
with a hose of at least 1000 mm on the outside
**) extreme temperature range when the control unit is operated between +18°C and +25°C,
with a hose of at least 2000 mm on the outside

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10. General
Elektrotechnik Schabus GmbH & Co. KG is not liable for damage and/or
loss of any kind, such as individual or consequential damage, resulting
from the gas detector not giving an alarm signal despite an increased
gas concentration.
In order to always be able to guarantee perfect functionality, you should
have the sensor checked after 5 years at the latest and replaced after 8
years for your own safety. See sensor lifetime in the technical data.
10.1 cleaning and care
Avoid the inuence of moisture (splash or rainwater), dust and direct
sunlight on the device. Only clean the device with a dry linen cloth, which
can be slightly moistened if it is very dirty. Do not use any solvent-based
cleaning agents for cleaning.
10.2 Declaration of Conformity
The conformity of this device to the EU directives is conrmed by the
CE mark on the device. The declaration of conformity can be downloa-
ded from our online shop on the product page or requested from info@
elektrotechnik-schabus.de.
All rights, technical changes, errors and misprints reserved.

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10.3 warranty
We grant a statutory warranty on your electronic product from Elektro-
technik Schabus for material defects and quality defects from the date
of purchase. Elektrotechnik Schabus will repair or replace your device
free of charge under the following conditions:
If there is a statutory warranty, the device must be sent in with the fol-
lowing documents: description of the fault, proof of purchase and your
address and delivery address (name, telephone number, street, house
number, zip code, city, country).
Devices that are returned to Elektrotechnik Schabus must be adequately
packaged. Elektrotechnik Schabus assumes no liability whatsoever for
damage or loss during shipping.
The device must have been used in accordance with the instructions for
use. Elektrotechnik Schabus accepts no liability for damage caused by
accident, misuse, alteration or neglect.
Elektrotechnik Schabus assumes no liability for loss, damage or ex-
penses of any kind resulting from the use of the devices or accessories.
The warranty does not affect your statutory rights as a consumer.
10.4 return
If your device is defective or has a fault, please contact us:
Email [email protected]
Please provide your complete address and the reason for the return. We
will arrange for the package to be picked up for you free of charge (only
within Germany). Under no circumstances should you send us a freight
collect package, we will not accept it! Unauthorized returns that do not
constitute a complaint will be charged to you afterwards.

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10.5 environmental information
The production of the product you have purchased required the extrac-
tion and use of natural raw materials. It may contain substances that
are hazardous to health and the environment. To avoid spreading these
substances in your area and to save natural resources, we ask you to use
the appropriate return systems. Thanks to these systems, the materials
of your product can be reused in an environmentally friendly manner at
the end of its lifespan.
(WEEE-NR.: 91394868)
The crossed-out trash can icon on the
Product reminds you to use these systems.
If you need more information about collection, reuse and recycling sche-
mes, contact your city‘s waste advisory service. You can also contact
us for more information about the environmental performance of our
products.

Elektrotechnik Schabus GmbH & Co. KG
Baierbacher Str. 150
D-83071 Stephanskirchen
TEL [phone]
FAX [phone]
MAIL [email protected]
WEB www.elektrotechnik-schabus.de
300263-220808-EN-SCHABUS