CO Guardian LLC Document: 353-002
1951 E. AIRPORT DRIVE Date: 11/15/05
TUCSON, AZ. 85706 REV ORIG.
353 FAMILY MODEL OWNERS/INSTALLATION MANUAL Page 7 of 17
4.0 SCOPE (all models)
The Model 353 family of Carbon Monoxide Detectors are designed to detect,
measure, and provide a visual alert to the crew of Reciprocating Engine type
aircraft before the cockpit level of carbon monoxide (CO) reaches a critical level.
The installation consists of a single carbon monoxide detector indicator operating
on aircraft DC power (14v or 28v). The aircraft supplied power and aircraft wiring
is protected by a 2 ampere, resettable, trip free, type circuit breaker. The Carbon
Monoxide Detector recommended location is behind the existing aircraft
instrument panel.
The CO Detector installation consists of the CO Detector, a Test/Reset button,
and a required amber ALERT annunciator light mounted on the cockpit
instrument panel.
The carbon monoxide alarm level is calibrated to provide a visual alert within 5
minutes or less whenever the carbon monoxide level reaches 50 parts per million
(PPM) by volume or greater. The warning time is shortened at higher levels of
CO concentrations and becomes approximately instant should the carbon
monoxide level reach 400 parts per million by volume (PPM) or greater.
In case of a carbon monoxide alert, the pilot will receive an amber Alert
annunciator light that is mounted on the Pilot's instrument panel on remote
mounts and on the unit itself on the panel mount. The visual alert will remain until
the carbon monoxide level is reduced below the alert level. The indicator is
automatically reset when the CO level drops below 50 PPM. There is a three-
minute delay at startup to stabilize the sensor before the unit will accurately
sense CO levels.
The 353 and 353R have a built in pressure compensation sensor to detect cabin
altitude changes up to 25,000 to give a better accuracy in CO Detection. These
models also alarm if the cabin altitude goes above 10,000 feet for 10 seconds,
12,500 for 10 seconds and stays on over 14,000 feet. These models also have
RS232 output for display data of CO Level on Garmin GNS480 and other
manufacturers.
