CO Guardian LLC Document No. 01-2510-02
1951 E. AIRPORT DRIVE Date: 11/23/02
TUCSON, AZ. 85706 REV A
4.0 SCOPE
The Model 452 Carbon Monoxide Detector is designed to detect, measure, and
provide both a visual and aural alert to the crew of piston engine type aircraft
before the level of carbon monoxide (CO) reaches a critical level.
The installation consists of a single carbon monoxide detector indicator operating
on aircraft DC power. The aircraft supplied power and aircraft wiring is protected
by a 2 ampere, resetable, trip free, type circuit breaker. The Carbon Monoxide
Detector is installed in the existing aircraft instrument panel within view and reach
of the pilot.
The CO Detector contains a Test/Reset button, an aural alarm buzzer, an Amber
LED ALERT annunciator, and a green LED STATUS annunciator.
The carbon monoxide alarm level is calibrated to provide both an aural and visual
alert within 5 minutes or less whenever the carbon monoxide level reaches 50
parts per million (PPM) by volume or above per TSO C48A. 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 above.
In case of a carbon monoxide alert, the pilot can acknowledge the alert and
silence the aural warning while keeping the visual alert until the carbon monoxide
level is again 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
for sensor to stabilize before the unit will sense CO.
5.0 SERVICE FACILITIES
The operator can service all components other than the model 452 units itself at
an FAA certified Repair Station.
NOTE: The sensor requires special gases for testing and calibration. If any
discrepancies are found with the unit during installation or during the
seven-year operational service life, the unit must be returned to CO
Guardian for repair or replacement. After seven (7) years, the unit must be
returned to the manufacturer for CO sensor replacement and re-calibration.
6.0 INSTALLATION PROCEDURE
The following documents the installation criteria of the Carbon Monoxide Detector
MODEL 452 INSTALLATION AND OPERATIONAL MANUAL Page 9 of 17
