Edwards Signaling 250-CO User Manual

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250-CO SafeAir Carbon Monoxide Detector
Installation Sheet

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© 2011 UTC Fire & Security. All rights reserved. 1 / 8 P/N 1061018 • REV E • ISS 14JUL11

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Carbon monoxide alarm procedure

WARNING: The carbon monoxide (CO) alarm indicates the

presence of CO, which can kill you. If the alarm signal sounds
four times, pauses for five seconds, and then repeats the
pattern:

1. Press the Test/Hush button at the detector or at the
control panel.

2. Move to fresh air immediately — outdoors or by an open
door or window. Check that all persons are accounted for.
Do not reenter the premises or move away from the open
door or window until emergency services responders have
arrived, the premises have been aired out, and your
detector remains in normal condition.

3. Call emergency services, the fire department, or 911:

Phone:

4. After following steps 1 to 3, if your detector reactivates,
repeat steps 1 to 3 and call a qualified appliance
technician to check for sources of CO from fuel-burning
equipment and appliances, and to inspect for proper
operation of this equipment.

Phone:

5. If problems are found during this inspection, have the
equipment serviced immediately. Note any combustion
equipment not inspected by the technician and consult the
manufacturer directly for more information about CO
safety for the equipment. Make sure that motor vehicles
are not, and have not been operating in an attached
garage or adjacent to the premises.

Information about carbon monoxide

WARNINGS

• Read these installation instructions in their entirety before
proceeding. Leave these instructions with the owner/user
of this CO detection equipment.

• This product is intended for use in indoor locations of
dwelling units. It is not designed to comply with
Occupational Safety and Health Administration (OSHA)
commercial or industrial standards.

• The detector only indicates the presence of CO gas at the
detector. Carbon monoxide gas may be present in other
areas.

• Failure to properly install, test, and maintain a CO detector
may cause it to fail, potentially resulting in loss of life.

• Installation of this detector is not a substitute for proper
installation, use, and maintenance of fossil fuel-burning
appliances, including appropriate ventilation and exhaust
systems.

• To reduce the risk of CO poisoning, test the detector
operation when not in use for 10 days or more.

• This detector does not operate without electrical power. As
fires frequently cause power interruption, discuss further
safeguards with the authority having jurisdiction (AHJ).

• Do not paint the detector.

2 / 8 P/N 1061018 • REV E • ISS 14JUL11

Notes

• Regulatory code may require that the system generate a
three-pulse temporal code (TC3) for fire alarms and a four­pulse temporal code (TC4) for CO alarms.

• The CO sensor is calibrated at the factory. CO sensitivity
is set to conform to UL 2034 requirements and cannot be
changed by the user. See “Regulatory information” on
page 7 for specific sensitivity values.

• Obstructions in vent pipes or unconventional vent pipe
designs which can amplify the above situations

• Poorly designed or maintained chimneys and/or vents

• Extended operation of unvented fossil fuel-burning devices
(range, oven, fireplace, etc.)

• Idling cars in an open or closed attached garage, or near
the premises

• Connect this detector only to a UL Listed control panel
capable of differentiating between alarm signals (fire,
burglary, CO, etc.) and providing distinct identification for
each.

• To reduce the likelihood of nuisance alarms, ventilate
accommodation spaces when using household cleaning
supplies or similar contaminants. If a detector has been
exposed to such contaminants, test it promptly afterwards.

Symptoms of CO poisoning

The following symptoms related to CO poisoning should be
discussed with all occupants of the protected site.

Mild exposure: Slight headache, nausea, vomiting, fatigue,
runny nose, sore eyes (often described as "flu-like" symptoms).

Medium exposure: Severe throbbing headache, dizziness,
drowsiness, confusion, fast heart rate.

Extreme exposure: Unconsciousness, brain damage,
convulsions, cardiorespiratory failure, death.

Many cases of reported CO poisoning indicate that while
victims are aware they are not well, they become so
disorientated that they are unable to save themselves by either
exiting the building or calling for assistance. Young children
and pets may be the first affected.

CO sources

The CO sensor in this detector is designed to detect carbon
monoxide gas from any source of combustion. It is not
intended to detect fire, smoke, or any other gas. Potential CO
sources include fuel-fired appliances (e.g., space heater,
furnace, water heater, range, oven, clothes dryer); other
sources of combustion (e.g., kerosene-burning stove or heater,
or gas log fireplace); or internal combustion engines.

In addition, excessive exhaust spillage or reverse venting of
fuel-burning appliances can produce dangerous transient
levels of CO. This can be caused by external conditions:

• Wind direction, velocity, or a combination of both,
including high gusts of wind or insufficient draft in vent
pipes

• Temperature inversions that can trap exhaust gases near
the ground

• 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 dryers,
furnaces, or water heaters

General limitations of CO detectors

This detector is designed to protect individuals from the acute
effects of CO exposure. It will not fully safeguard individuals
with specific medical conditions. People with special medical
problems should consider using specialized detection devices
with less than 30 ppm (parts per million) alarming capabilities.
If in doubt, consult a medical practitioner.

If the unit is in trouble or at the end of its life, it may not sense
CO and cannot be relied upon to monitor CO levels. Replace
the CO module every six years from the date of manufacture or
when the control panel indicates a sensor end-of-life condition,
whichever comes first.

A detector installed outside a bedroom may not awaken a
sleeper. Normal noise due to stereos, television, etc. may also
prevent the detector from being heard if distance or closed or
partly closed doors muffle the sounder. This unit is not
designed for the hearing impaired.

CO detectors are not a substitute for life safety. Though these
detectors will warn against increasing CO levels, we do not
warrant or imply in any way that they will protect lives from CO
poisoning. They should only be considered as an integral part
of a comprehensive safety program.

Detector locations

Selecting a suitable location is critical to the operation of CO
detectors. Figure shows appropriate detector locations.

Install detectors according to applicable codes and standards.
Place wall-mounted detectors at least 5 ft. (1.5 m) up from the
floor. For ceiling mounted applications, place detectors at least
1 ft. (0.3 m) from any wall. For combination detectors, follow
the spacing requirements for each sensor. Refer to the control
panel’s application bulletin for the sensor spacing
requirements.

The recommended CO detector locations are:

• Outside each separate sleeping area in the immediate
vicinity of the bedrooms (including areas such as hotel
rooms and dorm rooms)

• On every occupiable level of a dwelling unit, including
basements, but excluding attics and crawl spaces

• Centrally located on every habitable level of the building
and in every HVAC zone based on an engineering
evaluation considering potential sources and migration of
carbon monoxide

• On the ceiling in the same room as permanently installed
fuel-burning appliances

• In any area required by local building codes, legislation, or
the authority having jurisdiction

P/N 1061018 • REV E • ISS 14JUL11 3 / 8