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D A T A S H E E T
S85001-0618
Not to be used for installation purposes.
Issue 4
Edwards Signaling Catalog
u
Conventional Initiating
Overview
The SafeAir
TM
250-CO carbon monoxide (CO) detector is an accu-
rate and reliable means of alerting building occupants of potentially
dangerous levels of CO in the protected area. The internal electro-
chemical sensor communicates with a sophisticated on-board
microprocessor that accurately tracks CO levels over time.
This commercial-grade detection technology results in quick
response, reliable sensing, fast reset time, and superior false alarm
immunity. Its small size allows the 250-CO to blend inconspicu-
ously with any decor, and its smooth contoured design is compat-
ible with both residential and commercial environments.
Unaffected by normal indoor temperature variations, the 250-CO
actually self-adjusts for environmental changes and operates reli-
ably under a wide variety of conditions. It also monitors its own
performance and automatically compensates for sensitivity drift
throughout the course of its service life.
The 250-CO features the SafeTest™ functional test feature, which
facilitates testing with real CO gas. SafeTest meets the functional
test requirement in NFPA 720, 2009/2012 editions.
Like all CO detectors, the 250-CO has a limited service life. When
it approaches this point, the 250-CO’s six-year end-of-life timer
automatically triggers a warning, locally, at the control panel, and
optionally, at a central monitoring station, indicating that the device
should be serviced.
An integrated temporal 4 sounder horn provides local signaling capa-
bility for the 250-CO, and it easily interfaces with any listed intrusion or
fire alarm system by means of its 150mA output relay. Its low current
draw results in little additional demand on the system power supply.
The 250-CO fully complies with the latest UL 2075 requirements
which allows for installation in a wide range of both residential and
commercial settings.
Standard Features
• SafeTest™ enables a full functional test with spray of real CO
gas
• Electro-chemical sensing technology
• Transmits sensor end-of-life to the control panel and central
station if the system is monitored
• Fully listed to the latest UL 2075 CO standard for residential or
commercial occupancies
• Built-in trouble/power supervision relay
• Six-year sensor
• Self-diagnostics keep the device operating optimally through-
out its service life
• 12 or 24VDC operation and 150mA relay contact configurable
for normally open or normally closed operation
• Large SEMS terminals ease wiring installation 14 to 22 AWG
• One-touch TEST/HUSH button simplifies local operation
• Integrated 85 dBa temporal 4-sounder for local notification
• On-board LED provides local alarm and trouble indication
• Inconspicuous footprint and attractively contoured design
• Adapter plate makes replacing 240-COe CO detector simple
SafeAir
TM
12/24VDC
Carbon Monoxide
Detector with SafeTest
TM
250-CO
