Dometic LP/CO Alarm

Dometic LP/CO Alarm

What to do when the Alarm Sounds!

Carbon Monoxide or Propane Alarm Procedure

WARNING: Activation of the CO or LP Alarm indicates the presence of Carbon Monoxide (CO) or Propane (LP) which can kill you.
If alarm sound 4 quick beeps, 5 seconds off CO is present 
If alarm sound 6 quick beeps, 5 seconds off LP is present
If alarm sound 4-6 quick beeps with multi-tone both CO and LP is present 

1. Immediately move to fresh air – outdoors or by an open door/window. Do a head count to check that all persons are accounted for. Do not re-enter the premises nor move away from the open door/window until the emergency services responders have arrived, the premises have been aired out, and your alarm remains in its normal condition.
2. Call your emergency service (Fire Department or 911)
Never restart the source of a CO or LP problem until it has been corrected. Never ignore the sound of the alarm! If the alarm is sounding, pressing the test/reset button will terminate the alarm. If the CO or LP condition that caused the alert in the first place continues, the alarm will reactivate. If the unit alarms again within 6 minutes, it is sensing high levels of CO or LP which can quickly become a dangerous situation.
Carbon Monoxide (CO) and Liquefied Petroleum (LP or Propane) gases can cause hazardous conditions when found in high concentrations. Both gases are known to be found in recreational vehicles and the proper detection of these gases provides a safe environment for the occupants of the vehicle.
The following are the symptoms of Carbon Monoxide poisoning and must be discussed with all occupants of the vehicle.
1. Mild Exposure: Slight headache, nausea, vomiting, fatigue (“Flue like symptoms).
2. Medium Exposure: Severe throbbing headache, drowsiness, confusion, fast heart rate.
3. Extreme Exposure: Unconsciousness, convulsions, heart and lung failure, brain damage, and death.
Many cases of reported CARBON MONOXIDE POISONING indicate that while victims are aware they are not well, they become so disoriented they are unable to save themselves by either exiting the building or calling for assistance. Young children and house hold pets are typically the first affected. This device does not provide warnings for all levels of CO. Individuals with certain medical conditions may consider using a warning device that provides both audible and visual signals for carbon monoxide concentrations below 30 ppm. Everyone is susceptible to the danger of CO, but experts agree that unborn babies, small children, pregnant women, senior citizens and people with heart or respiratory problems are at the highest risk for serious injury or death.
If you experience ANY symptoms of CO poisoning, consult your physician.
Be aware that the following conditions can result in transient CO situations, such as:

1. Excessive spillage or reverse venting of fuel burning appliances caused by:
 Outdoor ambient conditions such as wind direction and/or velocity, including high gusts of wind; heavy air in the vent pipes (cold/humid air with extended periods between cycles).
 Negative pressure differential resulting from the use of exhaust fans.
 Simultaneous operation of several fuel burning appliances competing for limited internal air.
 Vent pipe connection vibrating loose from clothes dryers, furnaces, or water heaters.
 Obstructions in or unconventional vent pipe designs which amplify the above situations.
2. Extended operation of un-vented fuel-burning devices (range, oven, fireplace, etc.
3. Temperature inversions which can trap exhaust gasses near the ground.
4. Car idling in an open or closed attached garage, or near a home.

LP gas is commonly called Propane and is sold commercially as a suitable fuel in portable and permanent heating and cooking appliances.
It is important to detect LP gas due to its explosiveness at concentrated volumes. The lowest explosive limit for LP concentration is 2,1000 parts per million (ppm). This detector was designed to alarm at 10% of this limit or 2100 ppm.
IMPORTANT: This carbon monoxide alarm is designed to detect carbon monoxide from ANY source of combustion. It is NOT designed to detect smoke, fire, or any other gas
WARNING: Carbon monoxide alarms are not smoke alarms. This carbon monoxide alarm is not a substitute for installing and maintain an appropriate number of smoke alarms in your home.
This carbon monoxide alarm will not sense smoke, fire, or any poisonous gas other than carbon monoxide even though carbon monoxide can be generated by fire. For this reason you must install smoke alarms to provide early warning of fire and to protect you and your family from fire and its related hazards.
CAUTION: This alarm will only indicate the presence of carbon monoxide or propane at the sensors. Carbon monoxide or propane may be present in other areas.
WARNING: This product is intended for use in ordinary indoor locations of family living units. It is not designed to measure compliance with commercial or industrial standards, It is not suitable for installation in hazardous locations as defined in the National Electric Code.
The Installation of this device should not be used as a substitute for proper installation, use and maintenance of fuel burning appliances, including appropriate ventilation and exhaust systems. It does not prevent CO from occurring, nor can it solve and existing CO problem.
WARNING: This device is designed to protect individuals from acute effects of carbon monoxide exposure. It may not fully safeguard individuals with specific medical conditions. If in doubt, consult a medical practitioner.
Individuals with medical problems may consider using warning devices which provide audible and visual signals for carbon monoxide concentrations under 30 PPM.
This carbon monoxide and propane alarm requires a continuous supply of electrical power – it will not work without power.
This alarm has not been investigated for carbon monoxide detection below 70 PPM.
WARNING: If alarm has been subjected to abnormally cold temperatures, the alarm may exhibit an Error condition. Allow the alarm to warm and press the “Test/Reset” button to reset the alarm.
If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

 Evacuate all persons from vehicle.
 Shut off gas supply at gas container or source.
 Do not touch any electrical switch, or use any phone or radio in vehicle.
 Do not start vehicle’s engine or electric generator.
 Contact nearest gas supplier or qualified Service Technician for repairs.
 If you cannot reach a gas supplier or qualified Service Technician, contact the nearest fire department.
 Do not run on gas supply until gas leak(s) has been repaired.
Note: two self-adhesive emergency contact labels are provided. The user must add telephone numbers for the local emergency service provider and for a qualified service
technician. User must place one label next to the alarm. The other label must be placed near a source of fresh air where you plan to gather in the event the alarm indicates carbon monoxide presence.

Note: Unit must be powered for three minutes before test can be performed.

The Test/Rest button is used to verify proper alarm operating. Executing the test function sounds the alarm and lights up all LED's. The test will sound the alarm twice, with 4 “beeps” in 1 second followed by 5 seconds of silence.
By pressing the button, you can verify that the alarm sounds and that all visual indicators function properly. The alarm is internally monitored while powered to ensure proper operation and to detect faults.

 This detector will only indicate the presence of CO or LP gas at the sensor. Gases may be present in other areas.
 The detector is not suitable as a smoke or fire detector. Not suitable for installation in hazardous locations as defined in the National Electrical Code.

The alarm includes four LED indicators, an LP, CO and LPCO oscillating multi-tone audible alarms, and one Test/Reset button that provide interaction and feed back with your alarm. The indicators allow you to troubleshoot your alarm and to determine the proper actions to take. The visual indicators are labeled Power, Fault, Carbon Monoxide, and Propane.
The alarm operates in six separate modes that will be identified in this section.
Power Off Mode
This mode indicates that there is insufficient power provided to the alarm. The indicators and button will not function in this mode. Sufficient power must be provided to the alarm to exit this mode.
Normal Gas Detection Mode
This mode indicates that gas concentrations are continuously monitored. It also indicates that gas concentrations are at safe levels. In this mode the Power indicator will be lit, and all other indicators will not be active. The Test function for the Test/Reset button will be active.
Alarm Active Mode
This mode indicates that one or more gas concentrations have achieved unsafe levels. In this mode the Power indicator will be lit. In the case that the CO concentration is unsafe the Carbon Monoxide indicator will be lit. In the case that the LP concentration is unsafe the Propane indicator will be lit. In this mode the audible indicator will signal an alarm, and the Reset function of the Test/Reset button will be active. This mode will be exited automatically if the CO concentration falls to a safe level for an extended period of time and LP concentrations falls below 500 ppm for greater than 10 seconds.
Alarm Test Mode
This mode indicates that the Test function of the Test/Reset button was imitated. In this mode, all visual indicators will be lit, and the audible indicator will signal an alarm. The test/Rest button will not function during this mode. This mode will be exited automatically within 10 seconds.
Alarm Reset / Stabilization Mode
This mode indicates that the alarm is stabilizing for the first 3 minutes after power-up or the first 6 minutes after the Rest Function was initiated. In this mode the Power indicator will be lit, and the reset alarm’s indicator will be flashing. The other visual indicators, the audible indicator, and the Test/Reset button function will be off. This mode will be exited if the previously inactive alarm is triggered. If gas concentrations are still high after the 6 minutes, the previous alarm will reactivate.
Fault Mode
This mode indicates that a fault has been detected that compromises some alarm function. If a fault is detected on only one of the sensors, the other sensor would function normally. The table below lists the indicator actions and the corresponding alarm status. This mode will be exited automatically when the fault is cleared.
If the fault persists, the alarm is not functioning properly and must be replaced to ensure your safety in the area.
End of Life Mode
The Detector will operate in end-of-life mode after the Detector has been powered for 7 years +/- 128 days. This represents the operating life of the sensors used to detect CO and LP gas.
After 7 years, the sensors are no longer reliable and the Detector must be replaced. Once end-of-life mode has been entered, it is permanent, even after a power out cycle. If the reset/test button is pressed during end-of-life mode, the audible alarm will be silenced for 48 hours before being automatically reactivated. The power visual indicator will be on and the CO and/or LP visual indicators will be flashing. The audible alarm will be sounding per table below.


The LP/CO alarm is covered under the Dometic warranty. You should contact your local authorized Dometic service center or contact Dometic directly for assistance in locating the nearest service center.
RETAIL CUSTOMER SUPPORT - Phone: 800-544-4881 E-Mail:

*Please see attached Alarm Manual for full details.

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