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.