CO Alarm GX-C300P for Thermally Demanding Rooms
€335.29
The professional CO detector for thermally demanding and dusty rooms: it measures via hose, displays ppm-accurately and switches off
The Schabus PROFI CO ALARM GX-C300P is a fixed-installation carbon monoxide detector with an integrated electrochemical sensor designed for rooms where a wall-mounted detector cannot operate permanently: saunas, cold stores, pellet and wood-chip bunkers and industrial environments. For this purpose the device is mounted outside the room and connected to the monitored room via a silicone hose. Carbon monoxide (CO) reaches the device by diffusion; a quiet fan merely accelerates this process. Sensor and electronics are thereby protected from heat, cold and dust.
An illuminated plain-text display shows the operating status and the measured CO concentration with ppm accuracy. In the event of danger the GX-C300P warns acoustically with a loud piezo signal tone and optically with flashing display illumination and a red LED. At the same time the alarm relay drops out and switches off the hazard source or switches on forced ventilation, for example via a solenoid shut-off valve in the gas supply line. A second potential-free relay reports technical faults detected by the device itself to the building management system.
Sensor, measuring cell, evaluation electronics and software have undergone a full test by TÜV Süd according to DIN EN 50291 (with exceptions, see operating instructions). The alarm characteristic is graduated: at high CO levels the alarm is triggered quickly; at lower concentrations it is delayed in accordance with the standard. This avoids false alarms while still detecting gradual poisoning. On request, alarm values, delay times and relay logic can be adapted at the factory, with test report and documentation. The GX-C300P operates from the mains without a battery and is designed for continuous operation.
Important note: The GX-C300P may only be installed on a wall in dry indoor rooms, not in potentially explosive atmospheres. Installation must be carried out by a qualified specialist. Lay the hose exactly according to the instructions: the warning device must always be located above the hose inlet; sagging loops must be avoided.
Measure via hose, display ppm-accurately, switch safely
The GX-C300P combines standards-compliant CO detection with a hose system for difficult rooms and two potential-free relays for active protective measures.
For thermally demanding rooms
The device remains outside; only the hose leads into the room, e.g. into saunas, cold stores or technical rooms.
For dusty rooms
The supplied dust filter at the hose inlet protects the sensor in rooms with high dust load, e.g. wood workshops or pellet bunkers.
Diffusion with fan support
CO diffuses into the device by itself; a quiet, continuous-duty fan accelerates the process. A loud, fault-prone pump is deliberately dispensed with.
Standards-compliant CO detection
Electrochemical sensor, TÜV-tested according to DIN EN 50291 with graduated alarm characteristic and intelligent delay to prevent false alarms.
ppm-accurate display
The illuminated plain-text display shows operating status, CO concentration and fan status. The display is in English plain text.
Acoustic and visual
Loud piezo sounder, flashing display illumination and red LED provide unmistakable warning.
Alarm relay
Potential-free changeover contact for switching off the hazard source, for forced ventilation, safety controls or connection to a BUS system (EIB).
Fault relay
Potential-free changeover contact that reports technical faults to the building management system. A connected gas boiler is switched off as a safety precaution.
Continuous monitoring
A 32-bit microcontroller monitors the system around the clock at approximately 300 points in hardware and software. Operating states are stored and displayed.
Sensor test at the push of a button
The sensor element is checked manually: hold the RESET | TEST button for about 5 seconds, then the sensor test runs.
Factory-adapted on request
Alarm values, delay times and relay logic can be adapted at the factory with test report and documentation.
Replaceable sensor
At the end of the sensor service life the device is fitted with a new sensor at the factory and recalibrated.
What is included in the box
Everything for wall mounting and hose connection is included. The device has no options and no additional variants.
- CO warning device GX-C300P
- 2 metres of silicone hose (Art. No. 21002), pre-assembled
- Dust filter (Art. No. 300259) with small screw, wall plug and 2 cable ties
- Mounting material: 4 screws, 4 wall plugs, 2 screwdrivers, 2 large and 1 small PG cable gland
- Operating instructions
How the GX-C300P is constructed
The GX-C300P consists of the wall-mounted unit with sensor, fan, display and relays plus the hose system with dust filter that leads to the monitored room.
Housing with base and front panel
The front panel is held by four housing screws. For wall mounting they are loosened and the front panel removed; if necessary the flat ribbon cable is unplugged. The base is mounted on the wall with the supplied material. The housing is deliberately relatively sealed: in the event of an alarm, contaminated air cannot escape from the device while you observe the display.
Silicone hose
The thick-walled silicone hose (2 metres, pre-assembled) connects the device to the monitored room. In this hose section the air is already brought to the device temperature, which is why a minimum length is prescribed. It can be shortened if required.
Dust filter
The dust filter is attached to the hose inlet and secured with a cable tie. It can be fixed to the wall with screw and wall plug and is intended for dry indoor rooms with high dust load.
Fan
A quiet PC fan accelerates the diffusion of CO into the device. Its tacho signal is monitored; the status is shown on the start page of the display: “Fan: Ready” means the fan is running, “Fan: Fault” means it is not running. A stationary fan is reported as a fault. CO measurement and the alarm continue to function even then, only with a slight time delay.
Internal electrochemical CO sensor
The sensor is located inside the device. It contains chemically pure water that reacts with the CO molecules. The cooler and more humid the environment, the longer the sensor lasts. When the water has evaporated, this is detected during the sensor test and a non-rectifiable fault is displayed. The device is then fitted with a new sensor at the factory and recalibrated.
Plain-text display
After applying mains voltage the display greets with the manufacturer name and device type. Then the main display “(01) CO: Ready” appears with the fan status. In the event of an alarm the display illumination flashes.
SERVICE and RESET | TEST buttons
With SERVICE you scroll through the information displays and, in the event of a fault, retrieve the error number. With RESET | TEST you acknowledge the acoustic alarm, reset the fault relay and start the sensor test by holding the button down.
Status indicators (LEDs)
OPERATE (green) indicates operation, ERROR (yellow) faults and ALARM (red) the alarm. If only the green LED lights after start-up, the warning system is in order and ready for operation.
Piezo sounder
The sounder emits a loud, penetrating tone in the event of an alarm. In the event of a fault a short beep sounds at regular intervals.
Two potential-free changeover relays
The alarm relay Re1 (left) switches in the event of an alarm; the fault relay Re2 (right) switches in the event of faults. Each has the terminals G (common contact), Ö (normally closed) and S (normally open). In monitoring mode the relays are energised; in alarm or fault mode they drop out. The permissible switching load according to the operating instructions must never be exceeded.
Mains connection and terminal blocks
The mains cable is routed through a PG cable gland and connected to the screw terminals L, N and PE. These are each provided in duplicate and interconnected to facilitate bridging to the relays.
Installing, laying the hose and commissioning
Before installation and first commissioning, carefully read the operating instructions and follow the safety instructions in particular. Installation must be carried out by a qualified specialist who also observes the five safety rules.
Mounting position
At medium height
The device is mounted on a wall at medium height so that the display is easy to read when standing.
Above the hose inlet
The warning device must always be located above the hose inlet.
Dry indoor rooms only
Install only on a wall in dry indoor rooms, not in potentially explosive atmospheres.
Laying the hose to thermally demanding rooms
- Absolutely avoid sagging loops by careful routing
- Vertical routing is optimal; no horizontal routing
- Maintain at least 1 metre of hose between device and wall outlet
- With lateral offset maintain a minimum incline of 15°, preferably 20°
- Hose length maximum 4 metres, bending radius at least 70 mm
- The hose must neither be kinked nor crushed
- For shortening, add the wall thickness plus an overhang of 5 to 10 mm in the room
- Check the hose regularly for damage and soiling
Condensation and other deposits in the hose hinder the diffusion of CO into the device. The warning device cannot detect this; it can lead to a delayed alarm or, in the worst case, to failure of the monitoring. Therefore clean or replace the hose if necessary with an equivalent specimen. Only thick-walled silicone hoses are recommended, e.g. Schabus Art. No. 21002. With other types or more than 4 metres total length the response time can be considerably delayed.
Hose routing and fastening
- With vertical mounting above the outlet hole, fastening of the hose can be omitted provided it is not a public area
- In areas with public traffic, e.g. in a sauna, we recommend covering with a commercially available cable duct
- With lateral offset, conduit or plastic hose clips are recommended
- When observing the smallest bending radius, loop formation cannot be avoided
The specialist finds under their own responsibility the fastening appropriate to the surroundings and thus contributes to the intended function of the warning device.
Using the dust filter
- Only in dry indoor rooms with high dust load, e.g. wood workshops or pellet bunkers
- Attach to the hose inlet and secure with a cable tie
- Fix to the wall with screw and wall plug at the screw hole of the filter, observing the smallest bending radius
- If warning device and dust filter are in the same room, the hose may also be considerably shorter; minimum lengths then need not be observed
- Do not use in thermally demanding, i.e. particularly warm or cold environments
- Regularly free of dust by blowing and avoid moisture or wetness on the filter
- After one year of operation the filter should be replaced
Commissioning
- Loosen the housing screws, remove the front panel and fasten the base to the wall with the supplied mounting material.
- Install the connecting cables leading to the device as fixed surface-mounted cables.
- Connect the mains cable to terminals L, N and PE. If required, connect the potential-free relays for forced ventilation, shut-off valve or building management system.
- Attach the hose and, if applicable, the dust filter according to the routing rules.
- Refit the front panel (do not forget the flat ribbon cable) and screw it in place.
- Apply mains voltage. After a short electrical function test the warning system immediately monitors the room. If the green LED lights alone, the device is ready for operation.
Brief false alarm at start-up: During first commissioning a brief false alarm may occur at start-up. This extinguishes by itself after a few seconds.
How the GX-C300P reacts and how you check it
DIN EN 50291 specifies alarm delay times depending on the gas concentration: the higher the CO concentration, the faster the alarm is triggered. When the 300 ppm threshold is reached the system alarms immediately – hence the type designation GX-C300P.
What happens in the event of an alarm
- When the alarm thresholds are reached the device warns with a loud, penetrating tone, flashing display illumination and red LED.
- At the same time the alarm relay Re1 drops out and switches, for example, forced ventilation on or the solenoid shut-off valve of the gas supply line.
- The display shows “Alarm” with the alarm level and the exact value in the second line.
- Acknowledge the acoustic alarm with the RESET | TEST button.
- The alarm delay time starts again if the ventilation measures immediately initiated have not significantly reduced the CO concentration.
How the CO leaves the device again
Likewise by diffusion: when the CO concentration in the room falls again, for example by switching off the gas boiler or forced ventilation, the CO molecules move back from the device into the ventilated room.
Behaviour in the event of an alarm
- Ventilate the room and ensure by switching off the CO source that no further carbon monoxide can escape
- Inform other persons and ask them to leave the room
- Stay calm, open all doors and windows and take all combustion appliances out of service
- In the case of gas appliances, operate the emergency shut-off valve and ensure fresh air
- If the alarm continues or recurs, evacuate the building and leave all windows and doors open
- Ensure that all persons in the building have been warned
- Obtain medical help for anyone showing symptoms of carbon monoxide poisoning and point out that inhalation of carbon monoxide is suspected
- If necessary, call the emergency number so that the source of the CO leak can be identified and eliminated
- Do not put the combustion appliance back into service until it has been checked and released by a competent person
Sensor test
No automatic self-test is performed for the sensor element; it must be started manually. To do this, hold the RESET | TEST button for about 5 seconds; the sensor test then runs. We recommend performing it every four weeks, at the latest after one year.
Display in the low range: The standard provides that no value is displayed in the low range so as not to alarm you unnecessarily. In the service menu there is a page that shows the exact value there as well.
Display information, self-monitoring and faults
Display information
Each press of the SERVICE button takes you to the next display until the main display appears again. If you remain on one display, the device switches back to the main display by itself after a while. This also works if you hold the SERVICE button down a little longer.
Self-monitoring
Built-in intelligence (32-bit microcontroller) continuously monitors the system at approximately 300 points in hardware and software. Several temperatures, voltages and currents are measured and compensated, some are stored for internal long-term tests, calculated with each other and some are shown on the display.
Indication of a fault
In the event of any fault the fault relay Re2 drops out so that the building management system or home automation is informed and a possibly connected gas boiler is switched off as a safety precaution. In addition the yellow LED flashes or lights continuously and a short beep sounds at regular intervals. Press the SERVICE button until the display shows the type of fault. The term “error” appears with a number that you can quote to Elektrotechnik Schabus technical support. Only a few faults affect the CO measurement. Many merely indicate adverse environmental conditions with accelerated ageing or mains voltage fluctuations. The flashing patterns of the yellow LED are controlled by the microcontroller. If it itself has a problem, the yellow LED lights continuously. This can only be remedied at the factory in Stephanskirchen.
Clearing faults
Press the RESET | TEST button so that the fault relay Re2 re-energises. Only if a fault of the same or a different type occurs again will it drop out. Most faults clear themselves or when the warning device is disconnected from the power supply, allowed to cool for about 15 minutes and then restarted. If there is no improvement, contact Elektrotechnik Schabus technical support.
Manufacturer’s notes
- Carefully read and keep the operating instructions before installation and first commissioning
- Installation only by a qualified specialist
- Install only on a wall in dry indoor rooms, not in potentially explosive atmospheres
- Packaging material is not a toy and must be kept away from children
- Avoid moisture (splash or rain water), dust and direct sunlight on the device
- Intended for residential areas, sales areas, commercial and industrial premises and small businesses connected to the public low-voltage network
- The device is not approved for other uses
- The CE declaration is available for download on the manufacturer’s website
Maintenance, cleaning and care
Before the annual sensor test free the device of dust and use only dry cloths. In case of heavy soiling the linen cloth may be slightly dampened. Do not use solvent-based cleaning agents. Do not vacuum the device with a vacuum cleaner: through the small slots and openings very high air velocities can arise inside that permanently impair the sensor element. An imminent defect or a severely shortened service life would be the result. In addition, check the hose regularly and replace the dust filter after one year of operation.
Note for maintenance companies
It is recommended that at every visit all data are entered in a list with date and time. This allows conclusions to be drawn about the operational reliability of the system and any possible tampering. A template can be found in the operating instructions.
Warranty, guarantee and disposal
The GX-C300P is covered by the statutory warranty of at least 2 years in the EU. The manufacturer Elektrotechnik Schabus additionally offers a 5-year guarantee that can be registered online. Repair and spare parts are available directly from the manufacturer, even beyond the statutory warranty.
The GX-C300P must not be disposed of with household waste. The crossed-out wheeled bin symbol on the product reminds you to use the take-back systems for waste electrical and electronic equipment (WEEE No. DE91394868). Further information on collection, reuse and recycling systems is available from your local waste advice centre.
Why the GX-C300P is suitable
For difficult rooms
Measures via hose from saunas, cold stores, pellet and wood-chip bunkers and industrial environments.
Sensor protected
Device and sensor remain outside; the dust filter protects in high dust load.
Standards-compliant
TÜV-tested electrochemical sensor according to DIN EN 50291 with intelligent delay to prevent false alarms.
Active protection
Alarm relay switches forced ventilation, shut-off valve or safety control.
Always in view
ppm-accurate display and fan status on the illuminated plain-text display.
For building management systems
Separate potential-free relays for alarm and fault, also for BUS systems (EIB).
According to your specifications
Alarm values, delay times and relay logic adaptable at the factory on request, with test report.
From the manufacturer
Made in Germany, 5-year guarantee registerable, repair and spare parts directly from the manufacturer.
Areas of application
- Pellet and wood-chip bunkers
- Gas-fired commercial sauna facilities
- Cold stores
- CHP and cogeneration plants
- Boiler rooms and technical rooms with combustion appliances
- Wood workshops and dusty storage areas
- Industrial environments with combustion processes
- Open fireplaces in catering, canteens and mobile kitchens
- Room air monitoring in shisha bars and smoking clubs
- Stairwells, escape routes from underground garages and small private underground garages
- Monitoring of gas boilers and combustion appliances for escaping CO
- Control of forced ventilation, building management systems and BUS systems
The Schabus PROFI CO ALARM GX-C300P: CO detected, danger averted.
Frequently asked questions
What is the GX-C300P intended for?
For CO monitoring in rooms that are thermally demanding or heavily dust-laden, for example saunas, cold stores, pellet and wood-chip bunkers. For this purpose the device is connected to the room via a hose.
How does the air reach the sensor?
By diffusion: the CO molecules migrate by themselves through the hose into the device, faster with warm air, slower with cold air. A quiet fan accelerates the process. A pump that extracts air is deliberately not used.
What happens in the event of an alarm?
The piezo sounder emits a loud tone, the display illumination and the red LED flash, and the alarm relay Re1 drops out. This allows, for example, forced ventilation to be activated or the gas supply line to be locked with a solenoid shut-off valve. Acknowledge the acoustic alarm with the RESET | TEST button.
Why does the alarm not trigger immediately at low CO levels?
The alarm characteristic is graduated as specified by DIN EN 50291: at high CO levels the alarm is triggered quickly; at lower concentrations it is delayed. This avoids false alarms while still detecting gradual poisoning. When the 300 ppm threshold is reached the system alarms immediately.
Can I have the alarm values adapted?
Yes, on request the manufacturer adapts alarm values, delay times and relay logic at the factory, with test report and documentation. Please contact us about this before ordering.
What are the two relays for?
Both are potential-free changeover relays. The alarm relay Re1 switches in the event of an alarm and activates, for example, forced ventilation, a shut-off valve, a safety control or a BUS system (EIB). The fault relay Re2 reports technical faults to the building management system or home automation.
How do I lay the hose correctly?
The warning device must always be located above the hose inlet. Preferably lay the hose vertically; with lateral offset with an incline. Sagging loops, kinking and crushing must be avoided. A minimum length must be observed between device and wall outlet; the total length is limited. All dimensions can be found in the operating instructions and in the Installation section.
When do I need the dust filter?
In dry indoor rooms with high dust load, e.g. wood workshops or pellet bunkers. It belongs at the hose inlet. It must not be used in particularly warm or cold environments. Regularly free it of dust by blowing, keep it dry and replace it after one year of operation.
What does “Fan: Fault” mean on the display?
The fan is not running. This is recognised as a fault and the fault relay Re2 drops out. CO measurement and the alarm nevertheless continue to function, only with a slight time delay. How long the delay lasts depends on the hose length and the temperature of the monitored air.
How do I recognise that the device is ready for operation?
After applying mains voltage a short function test runs; the display shows the manufacturer name and device type. If the green LED then lights alone and the display shows “CO: Ready”, the device is ready for operation. At the first start a brief false alarm may occur that extinguishes after a few seconds.
How do I test the sensor?
Hold the RESET | TEST button for about 5 seconds; a sensor test is then performed. We recommend it every four weeks, at the latest after one year, because no automatic self-test runs for the sensor element.
What does the yellow LED mean?
The yellow LED indicates a fault detected by the device itself. The fault relay Re2 drops out and a short beep sounds. You can find the type of fault via the SERVICE button under “error” with a number. If the yellow LED lights continuously, this may also indicate a problem with the microcontroller that can only be remedied at the factory.
What to do in the event of a fault?
Press the RESET | TEST button so that the fault relay re-energises. Most faults clear themselves or after the device has been disconnected from the power supply for about 15 minutes and allowed to cool. If there is no improvement, quote the displayed number to technical support.
How long does the sensor last?
This depends on the environment: the cooler and more humid it is, the longer the sensor lasts. When the water in the sensor has evaporated, this is detected during the sensor test and a non-rectifiable fault is displayed. Then have the device fitted with a new sensor and recalibrated at Elektrotechnik Schabus.
May I vacuum the device?
No. Remove dust only with dry cloths. When vacuuming, very high air velocities can arise inside that permanently impair the sensor element.
What to do in the event of a persistent or repeated alarm?
Evacuate the building, leave all windows and doors open and ensure that all persons have been warned. Obtain medical help for persons with poisoning symptoms and, if necessary, call the emergency number. Do not put the combustion appliance back into service until it has been checked and released by a competent person.
How long is the guarantee valid?
The statutory warranty of at least 2 years applies in the EU. In addition the manufacturer Schabus offers a 5-year guarantee that can be registered online.
Questions about the CO ALARM GX-C300P?
Our support team in Germany advises you free of charge on selection, installation and configuration.
PROFI CO ALARM GX-C300P – Carbon Monoxide Detector for Thermally Demanding Environments
The GX-C300P is a professional carbon monoxide detector designed for locations with elevated thermal conditions. The unit is engineered for continuous operation in challenging temperature and humidity environments and provides highly accurate CO detection using a premium electrochemical sensor.
- Technical Data
- Operating voltage: 100–240 V AC, 50–60 Hz
- Power consumption: max. 6 VA (depending on operating condition)
- Protection rating: IP20 (IP65 available on request), control unit IP54
- Display: 2×16 character LCD (white/blue backlit), status LEDs:
– Green: Operate
– Yellow: Error
– Red: Alarm - Sensor technology: internal electrochemical sensor
- Software version: X 0.80
- Sound pressure level: 85 dB(A) @ 1 m
- Dimensions of control unit (H×W×D): 80 × 160 × 55 mm
- Sensor and Service Life
- Operating range (sensor): 0 °C to +50 °C, 10–90 % RH (non-condensing)
- Sensor lifetime:
– up to 10 years @ max. 28 °C / min. 30 % RH
– up to 6 years @ max. 40 °C / min. 40 % RH
Note: The sensor contains chemically pure water. Its evaporation affects sensor lifespan. At the end of sensor life, a permanent fault is displayed automatically. Renewal and calibration by Elektrotechnik Schabus are possible. - Environmental Conditions
- Operating range (control unit): -15 °C to +50 °C, 10–90 % RH (non-condensing)
- Continuous operation: +10 °C to +50 °C, 10–90 % RH (non-condensing)
- Relay Contacts
- Alarm relay (Re1): 250 V AC / 5 A (potential-free changeover contact)
- Fault relay (Re2): 60 V DC / 5 A (potential-free changeover contact)
Manufacturer information:
Electrical engineering Schabus GmbH & Co. KG
Baierbacher Straße 150
83071 Stephanskirchen
Germany
Telephone: +49 80 36 / 674 979 – 0
Email: info@elektrotechnik-schabus.de
Responsible person:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
