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Part Number 18160, F, 06/29/2021
General Information Continued
Where Must We Guard Against Carbon Monoxide?
Carbon monoxide is a by-product of combustion. CO exists wherever fuels are burned to generate
power or heat. Boats may utilize propane or compressed gas for cooking and/or heating. Boats
have the added hazard of an auxiliary power generator where exhaust fumes may drift into the
vessel. This hazard may also be created by a neighboring boat’s exhaust fumes circulating into the
cabin. The “station wagon effect”, is another hazard that is caused by exhaust fumes that are
captured via a rear opening while underway.
Boat Hazards
Boats that are underway should close all aft portholes and open a forward hatch, which may lend
to pressurize the living spaces within the boat. As in RV’s, no sleeping, particularly in aft cabins,
should be permitted while underway. Occupants of the “bridge” should also maintain proper
ventilation by opening a forward window or windshield to drive “station wagon” effect fumes
away from the occupants. Extreme caution must be taken while at anchor or in a slip while an
auxiliary power generator is operating. Wind still nights can easily allow fumes to enter the boat.
Inspect the exhaust systems of propulsion and auxiliary generators frequently for possible leaks.
High concentrations of CO in your boat may originate from an adjacent boat. Exhaust fumes from
nearby boats may enter your boat through open hatches or windows.
Features of the CMD6 Marine Series
The CO Alarm is designed to meet applicable marine standards. The CO Alarm is tested by ETL to
meet UL 2034 Marine requirements.
The CO Alarm conducts a self-diagnosis of critical components every 180 seconds. Should a major
component fail, the CO Alarm will enter a fault mode. Both audible and visual warning indicators
are activated.
The CO Alarm circuit board is sealed against moisture and corrosion to withstand the harshest
environments and ensure durability.
Features of the CMD6-Marine Interconnect-Relay Series
In addition, the CMD6-MBR, CMD6-MDR, CMD6-MBR-B & CMD6-MDR-B are designed to
interconnect with units of the same power source as well as interact with equipment on the
vessel. If a unit senses CO at an alarm level, it will communicate with the interconnected units
and send them into alarm and open a normally closed (NC) relay on the alarming unit, which will
force the equipment to shut down. The unit that senses CO will have a distinct LED pattern
compared to the interconnected units. The CMD6 Marine Interconnect-Relay Series are designed
to connect to a maximum of ten interconnected devices and to accommodate a maximum current
of 1 Amp, 220V DC.
