Kidde KN-COB-B-LPM 用户手册

Model KN-COPP-B-LPM is equipped with a digital display that shows 
levels of CO (displayed in PPM – parts per million). Learn the difference 
between dangerous, high, mid and low levels.

Dangerous Levels:  
When someone is experiencing symptoms of CO poisoning and CO read-
ings are generally above 100 PPM. Anytime someone is experiencing the 
symptoms of CO poisoning this should be treated as an emergency. See 
“What to do When the Alarm Sounds” (inside front cover).

High Levels: 
Generally above 100 PPM, with no one experiencing symptoms. This 
should be treated as an urgent situation. See “What to do When the 
Alarm Sounds” (inside front cover).

Mid Levels: 
Generally between 50 PPM to 100 PPM. This should be cause for concern 
and should not be ignored or dismissed. See “What to do When the 
Alarm Sounds” (inside front cover).

Low Levels: 
Generally below 50 PPM. Kidde recommends you take action to eliminate 
the source of CO. See “What to do When the Alarm Sounds” (inside 
front cover).

tion. See “What to do When the Alarm Sounds” (inside front cover).

Inside your home, appliances used for heating and cooking are the 
most likely sources of CO. Vehicles running in attached garages can also 
produce dangerous levels of CO.

CO can be produced when burning any fossil fuel, such as gasoline, pro-
pane, natural gas, oil and wood.  It can be produced by any fuel-burning 
appliance that is malfunctioning, improperly installed, or not ventilated 
correctly, such as:

• Automobiles, furnaces, gas ranges/stoves, gas clothes dryers, water 

heaters, portable fuel burning space heaters and generators, fireplaces, 
wood-burning stoves and certain swimming pool heaters. 

• Blocked chimneys or flues, back drafts and changes in air pressure, cor-

roded or disconnected vent pipes, loose or cracked furnace  
exchangers. 

• Vehicles and other combustion engines running in an open or  

closed garage, attached or near a home.

• Burning charcoal or fuel in grills and hibachis in an enclosed area.

The following conditions can result in transient CO situations: 

• Excessive spillage or reverse venting of fuel-burning appliances caused 

by outdoor ambient conditions, such as, wind direction and/or veloc-
ity, including high gusts of wind, heavy air in the vent pipes (cold/
humid air with extended periods between cycles).

• Negative pressure resulting from the use of exhaust fans.

• Simultaneous operation of several fuel-burning appliances competing 

for limited internal air.

• Vent pipe connections vibrating loose from clothes dryers, furnaces, or 

water heaters.

• Obstructions in, or unconventional, vent pipe designs which can 

amplify the above situations.

• Extended operation of unvented fuel-burning devices (range, oven, 

fireplace, etc.).

• Temperature inversions which can trap exhaust gases near the 

ground.

• Vehicle idling in an open or closed garage, or near a home.

To be safe, know the possible sources of CO in your home. Keep fuel-
burning appliances and their chimneys and vents in good working 
condition. Learn the early symptoms of exposure, and if you suspect CO 
poisoning, move outside to fresh air and get emergency help. Your first 
line of defense is an annual inspection and regular maintenance of your 
appliances. Contact a licensed contractor or call your local utility com-
pany for assistance. 

CO alarms provide early warning of the presence of CO, usually before a 
healthy adult would experience symptoms. This early warning is possible, 
however, only if your CO alarm is located, installed and maintained as 
described in this guide.