Locations to Avoid

Nuisance alarms are caused by placing alarms where they will not operate properly. To avoid nuisance alarms, do not place alarms:

–Within 1 foot (.3m) from fluorescent lights. Electronic noise may cause false alarms.

–Within 5 feet (1.5m) of any cooking appliance.

–Closer than 20 feet (6m) away from a furnace or other fuel burning heat source or fuel burning appliances such as a water heater.

–Near an open window or door, because the fresh air entering the opening may delay CO from reaching the alarm.

–In extremely humid areas. This alarm should be at least 10 feet (3m) from a bath or shower, sauna, humidifier, vaporizer, dishwasher, laundry room, utility room or other source of high humidity.

–In very cold or very hot environments or in unheated buildings or outdoor rooms where the temperature can go below or above the operating range of the alarm. Temperature limits for proper operation are 40o to 100oF (4.4o to 37.8oC).

–In turbulent air, such as near ceiling fans, heat vents, air conditioners, fresh air returns or open windows. Blowing air may prevent CO from reaching the sensors.

–Good ventilation is recommended when household cleaning supplies or similar contaminants are used.

–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 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 gasses near the ground.

–Car idling in an open or closed attached garage, or near a home.

What Levels of CO Cause an Alarm?

Underwriters Laboratories Inc. UL2034 defines three specific alarm points by which all residential CO alarms must alarm. They are measured in parts per million (ppm) of CO over time (in minutes).

UL2034 Required Alarm Points:

•If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15

MINUTES.

•If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50

MINUTES.

•If the alarm is exposed to 70 ppm of CO, IT MUST ALARM BETWEEN 60 and 240

MINUTES.

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CD-9590, CD-9690 specifications

Universal Security Instruments (USI) has established a reputation for developing reliable and advanced home safety products. Two significant models in their lineup are the CD-9690 and CD-9590, which are smoke and carbon monoxide detectors known for their user-friendly design and innovative technology.

The CD-9690 is notable for its combination of smoke and carbon monoxide detection capabilities. It features a photoelectric smoke sensing technology that is highly effective at identifying slow-burning fires, which can release significant smoke before becoming a full-blown blaze. This technology minimizes false alarms caused by cooking smoke or steam, providing peace of mind for homeowners. Moreover, the unit comes equipped with a voice alarm feature that distinctly announces the type of danger detected, whether it's smoke or carbon monoxide, allowing users to respond more effectively in an emergency.

In contrast, the CD-9590 is a robust carbon monoxide detector that utilizes advanced electrochemical sensing technology. This technology ensures high sensitivity and reliability, enabling the device to accurately detect dangerous levels of carbon monoxide in the environment. The CD-9590 is designed to provide a loud 85-decibel alarm along with a voice alert when CO levels rise above recommended thresholds, ensuring that users are promptly informed of potential hazards.

Both models are equipped with a battery backup system, ensuring they remain operational during power outages. The detectors come with a low battery alert, which signifies when it's time to replace the batteries, reducing the risk of the units being non-functional when needed most.

Another key characteristic of the CD-9690 and CD-9590 is their user-friendly installation. The units are designed for easy wall or ceiling mounting and include mounting hardware in the package. Additionally, the sleek design of both models makes them aesthetically pleasing and easy to integrate into any home decor.

Both models also feature test and silence buttons, allowing users to easily test the functionality of the alarms and silence them during non-emergency situations, further enhancing user control.

Overall, the Universal Security Instruments CD-9690 and CD-9590 detectors combine advanced technology, reliability, and ease of use, making them valuable additions to any safety-conscious home. With their ability to promptly detect and announce various dangers, these detectors play a crucial role in ensuring the safety of residents. Investing in such devices is a proactive step towards home safety and peace of mind.