CO Alarm GX-C330

The professional CO detector with 20 ppm immediate alarm and relay output: TÜV-tested, ppm-accurate, for occupational safety and commercial premises

The Schabus Profi CO Detector GX-C330 is a permanently installed carbon monoxide warning device for monitoring indoor rooms with open fireplaces and open combustion. It operates with an integrated, long-life electrochemical sensor. A two-line plain-text display continuously shows the operating status and the precise CO concentration in ppm. This enables preventive monitoring, not just pure alarming.

The GX-C330 alarms immediately as soon as 20 ppm CO is reached. There is no delay time and no pre-alarm. This value corresponds to the recognised limit value for occupational safety, formerly known as MAK, and is prescribed in many requirements by the supervisory authorities, especially when operating shisha bars. In the event of an alarm the device warns optically and acoustically; at the same time a potential-free relay switches, for example for a signal horn, flashing light, forced ventilation or safety shut-off. A second relay reports device faults to the building management system.

Sensor, measuring cell, evaluation and software have been fully tested and certified by TÜV Süd in accordance with DIN EN 50291. The device is installed on the wall at average nose height, is ready for operation immediately after the short self-test when mains voltage is applied, and can remain in continuous operation for years.

Measure, warn immediately, shut off

The GX-C330 combines a TÜV-tested electrochemical sensor with ppm-accurate display, immediate alarm and two potential-free changeover relays.

What’s in the box

The device is fully equipped with mounting material and cable glands for wall mounting. It has no options and no additional variants.

• CO warning device GX-C330
• Operating instructions
• Cable glands: 2 × M16 and 2 × M12
• Mounting material: 4 screws and wall plugs

The cables for mains connection and relay outputs are installed on site by the specialist. The connecting cables to the gas detector must be permanently installed as surface-mounted cables.

How the GX-C330 is constructed

Sensor, evaluation, display, signal sounder and relays are combined in a surface-mounted housing. The housing consists of a base shell and top shell; the top shell carries the display, buttons and LEDs.

One value, one reaction: 20 ppm

The GX-C330 has no pre-warning stage. As soon as 20 ppm CO is detected, full alarm is given immediately. There are no time delays.

Using the relays correctly

Two separate, potential-free signalling paths integrate the GX-C330 into your system.

Correct placement and commissioning

The GX-C330 may only be installed in dry indoor rooms on a wall. The mounting position “at average nose height” is chosen so that the display is easily readable when standing. This ensures proper functioning of the warning device.

Wall mounting

1. Loosen the four housing screws and remove the top shell. If necessary, unplug the flat ribbon cable at the connector.
2. Mount the base shell on the wall with the supplied mounting material (4 screws and wall plugs).
3. Route the connecting cables as permanent surface-mounted cables and introduce them via the cable glands.
4. Connect mains, relays and any accessories to the screw terminals, plug the flat ribbon cable back in and screw the top shell on.

Commissioning

1. Apply mains voltage. The device performs an electrical functional test for a few seconds; the display shows the manufacturer’s name and device type.
2. Afterwards the warning system is immediately in operation and monitors the room.
3. If only the green LED is lit, the warning system is in order and ready for use.

Note: Even after a short power failure the device restarts the functional test.

Test the function regularly

For your safety the manufacturer recommends regularly checking the acoustic alarm sounder with the test button for proper function.

How to check the GX-C330

1. Press the RESET | TEST button.
2. All three LEDs light, the acoustic alarm sounder is checked and both relays Re1 and Re2 switch over. Check whether the connected technology reacts as intended.

Behaviour in the event of an alarm

• Ventilate the room and switch off the CO source so that no further carbon monoxide can escape
• Inform other people and ask them to leave the room
• Follow the instructions of your regulatory authority on how to react in the event of an alarm
• Stay calm, open all doors and windows, stop all use of combustion appliances and, in the case of gas appliances, operate the emergency shut-off valve. Ensure a supply of 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 are warned
• Arrange 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 operation until a competent person has checked it and released it for use again

Fault indication, error codes and maintenance

How the device reports a fault

• The fault relay Re2 drops out and informs the building management system or home automation
• The yellow LED flashes or lights up
• A short beep sounds every 10 seconds
• Press the SERVICE button repeatedly until “error” and an error number appear on the display. Compare the number with the error groups below or quote it to the technical support of Elektrotechnik Schabus

If a self-test is evaluated as “not good”, the system performs up to three restarts, repeats the measurements and then decides whether a fault message is issued.

Error numbers at a glance

• 1 and 2: Internal supply voltage or mains supply too low
• 3: Sensor or sensor cable defective
• 12 and 25: Sensor check failed or sensor test failed (yellow LED flashes rapidly at 25)
• 4 to 9: One of the LEDs (yellow, red, green) cannot be switched on or off
• 10 and 11: Internal output fault
• 21, 22 and 27: Memory or internal software error (yellow LED flashes slowly)
• 26: Temperature sensor fault (yellow LED flashes slowly)
• 23 and 24: Ambient temperature too low or too high (yellow LED lights continuously)

Interpreting the yellow LED correctly

Only a few faults affect the measurement of the CO concentration and prevent alarming in the event of danger. There are also faults that do not affect the warning system. They can indicate adverse environmental conditions with accelerated ageing or mains voltage fluctuations. The flashing rhythms of the yellow LED come directly from the microcontroller. If it itself has a problem, the yellow LED only lights continuously. A controller problem can only be rectified at the manufacturer’s factory in Stephanskirchen; in this case contact the manufacturer.

Rectifying faults

• Press the RESET | TEST button so that the fault relay Re2 energizes again. If the fault persists, it remains energized and only drops out again in the event of a new fault
• Most faults clear themselves or when you disconnect the device from the power supply, allow it to cool for about 15 minutes and restart it
• If there is no improvement, contact technical support

Cleaning and maintenance

• The device operates maintenance-free. Only occasionally remove dust from it with dry cloths
• Do not vacuum the device with a vacuum cleaner. Through the small slots very high air velocities could arise inside that would permanently impair the sensor element. An imminent defect or a greatly reduced service life would be the result
• Avoid splash and rain water, dust and direct sunlight
• Do not use solvent-based cleaning agents; in the case of heavy soiling the linen cloth may be slightly dampened

Sensor check by the manufacturer

Have the sensor checked for function and accuracy by Elektrotechnik Schabus at the latest every three years. For this only the top shell of the GX-C330 is sent in; the installation remains in place. The test date is marked on the side of the cover. If applicable the manufacturer also installs a software update if a newer version is already available. The service life of the sensor depends on humidity and temperature; a cool and humid environment is best. If the sensor dries out, a fault message appears. Replacement and calibration are possible at low cost at Schabus.

What the display shows

When mains voltage is applied the display greets with the manufacturer’s name and the device type. During this time the device completes all self-tests. Afterwards the main display appears with the operating status and the current CO concentration in ppm.

Documentation and tamper protection

• It is recommended to record all data with date and time at each visit. This allows conclusions to be drawn about the operational safety of the system and possible manipulations
• The stored system statuses cannot be reset either by the user or by Elektrotechnik Schabus during the operating period
• If a new software is installed during factory maintenance, the manufacturer records the last statuses in writing and returns them to the user together with the test report
• Operating time, restart counter and alarm counter allow conclusions about proper continuous operation
• If there is suspicion of manipulation by switching off the CO warning devices, the manufacturer recommends joint electrical protection with refrigeration and freezing units

Manufacturer’s notes

• Read the operating instructions carefully before installation and commissioning and keep them; they form part of the product
• Installation must be carried out by a qualified specialist; the five safety rules must be observed
• Packaging material is not a toy and does not belong in the hands of children
• Install only in dry indoor rooms on a wall
• Do not use in potentially explosive atmospheres
• Approved only for the described applications
• Intended for residential, commercial and industrial areas, but also gastronomy, shisha lounges and laboratory environments as well as small businesses such as workshops and service centres
• The manufacturer is not liable for damage or losses resulting from the fact that no alarm signal is given despite elevated gas concentration
• The declaration of conformity is available for download on the manufacturer’s website

Warranty, guarantee and disposal

The GX-C330 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 prerequisite is that the device has been used in accordance with the operating instructions.

The GX-C330 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 so that the materials can be reused in an environmentally friendly manner at the end of their service life (WEEE Reg. No. DE91394868). Further information is available from your local waste advisory service or from the manufacturer.

Why the GX-C330 is suitable

Areas of application

• Shisha bars, shisha lounges and smoking clubs
• Monitoring of the proper functioning of ventilation systems
• Laboratory environments in universities, schools and companies
• Occupational safety measures for open combustion in gastronomy
• Storage of CO in pressurized cylinders
• Boiler rooms and all heat-generating systems
• Underground car parks
• Rooms with a prescribed CO warning device for occupational safety

The Schabus Profi CO Detector GX-C330: CO detected, danger averted.

Frequently asked questions