Page 2 of 4 DATA SHEET S85001-0618
Not to be used for installation purposes. Issue 4
Application
The SafeAir 250-CO Carbon Monoxide Detector is intended for
ordinary indoor-dwelling unit applications in both residential and
commercial occupancies, including single/multiple family residential
occupancies, hotel rooms, dorm rooms, and other areas approved
by the authority having jurisdiction (AHJ). The 250-CO detector
can connect to either UL 985 (Household Fire Warning) or UL 864
(Commercial Fire) control panels. It is not intended for use in indus-
trial applications such as gasoline reneries or parking garages,
which require different listings. The 250-CO detector has an optional
adapter mounting plate for the 240COe CO detector. To purchase
the plate order P/N 250-COPLT-5PKG.
Selecting a suitable location is critical to the operation of CO
detectors. Install the 250-CO in accordance with NFPA 720 Stan-
dard for the Installation of Carbon Monoxide (CO) Detection and
Warning Equipment. Place wall-mounted detectors at least 5 ft.
(1.5 m) up from the oor. For ceiling mounted applications, place
the detector at least 1 ft. (0.3 m) from any wall.
Recommended CO detector locations:
9Within 10 ft. (3 m) of all sleeping areas, including areas such
as hotel rooms and dorm rooms.
9In a suitable environment: areas with a temperature range of
32 to 104°F (0 to 40°C) and with a relative humidity range of 0
to 90% noncondensing.
9In residential dwellings, locate detectors in every bedroom,
within 10 ft. (3 m) of sleeping areas, and on each level. At a
minimum, place one detector outside the sleeping areas.
Recommended locations for CO detectors
Always check with your local building codes,
legislation, and Authority Having Jurisdiction
for specic CO location requirements in your area
Recommended CO detector locations in commercial occupancies:
9On every habitable level of the building based on an engineer-
ing evaluation considering potential sources and migration of
carbon monoxide
9In any area required by local building codes, legislation, or
Authorities Having Jurisdiction
9On a rm, permanent surface
Do not install the CO detector:
8Within 10 ft. (3 m) of a fuel-burning appliance
8Near air conditioners, heating registers, and any other ventilation
source that may interfere with CO gas entering the detector
8Where furniture or draperies may obstruct the airow
8In a recessed area
Operation
SafeTest functional test: This test facilitates the use of CO test
spray to verify the correct operation of the detector. Functional
testing is mandatory per NFPA 70 as of January 2012. SafeTest
mode is activated by pressing and holding down the test/hush
button per the installation instructions. While in SafeTest mode,
directing UL approved CO testing spray at the sensor port will
result in the activation of the alarm relay, and the sounder and red
LED to activate in a temporal-four pattern. Pressing and holding
the test/hush will exit SafeTest mode.
Distinct 85 dB temporal four-sounder alarm: The 85 dB
temporal-four sounder provides a distinctive alarm notication that
is easy to differentiate from smoke alarm notication devices. The
alarm beeps four times, rests ve seconds and then repeats the
pattern.
Test/hush button: Use the test/hush button to test the alarm and
silence an activated alarm. Pushing the test/hush button silences
the integral sounder for ve minutes. The red alarm light stays on
and if CO is still present after ve minutes, the detector once again
sounds in the temporal-four pattern. The hush feature does not
operate at CO levels above 350 ppm (parts per million).
End of sensor life indicator: The detector uses both a ash-
ing green LED and intermittent sounder chirps to indicate that the
detector needs replacing. To silence the detector, push the test/
hush button. The detector also begins signaling a trouble when the
CO sensor is approaching end-of-life. When connected to a Listed
control panel, the trouble relay can report a trouble condition locally
at the panel and optionally at the central station, if the system is
monitored.
Common trouble relay: The trouble relay opens to indicate a
trouble condition upon lost power, CO sensor cell trouble, or cell
end-of-life.
Installation
The 250-CO Carbon Monoxide Detector is a four-wire device
designed to use a Class 2 output from a control panel or auxiliary
power supply Listed to UL 985 or 864 standards.
All wiring must conform to the NFPA 70 National Electric Code, UL
2075, NFPA 720, an applicable codes. Use 14 to 22 AWG wire.
WARNINGS: Connect the CO detector only to a zone dedicat-
ed exclusively for CO detection and that is monitored 24 hours
a day. Do not connect to an initiating circuit with re or security
devices. Failure to properly install, test, and maintain a CO
detector may cause it to fail, potentially resulting in loss of life.
The 250-CO/240-COe adapter plate
Use the 250-COPLT-5PKG adaptor plate when replacing a 240-
COe with a 250-CO to cover the footprint of the 240-COe. For
example, use the plate to cover any paint discoloration left behind
from the 240-COe.
