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"Oil-Less” Scroll Medical Air Medical Systems

Appendix B - CO Monitor

B.1 Introduction

WARNING:

Before starting any installation, maintenance or service procedures, disconnect ALL
power to the system to prevent electrical shock hazard .

Before making or breaking any medical gas line connections, make sure the system is
depressurized in order to avoid personal injury.

An alarm condition on the CO monitor display indicates a CO level exceeding the
maximum set point, or a faulty CO sensor. Immediate action should be taken to reduce
the possibility of CO in the Medical Air line.

B.2 Specifications

B.2.1 Monitor
The instrument's electronics are enclosed in a NEMA-4A polycarbonate case. The case is corrosion resistant,
positively pressurized by the compressor supply line, and sealed except for a bleed hole to exhaust the
compressor's air. The unit operates on 110 VAC power supplied from the system control panel. Alarm contact
terminals are in the system control panel. Refer to the control panel wiring diagram.

Adjustment controls are not necessary since they are automatically performed by the microprocessor. The unit
has two internal push buttons to set alarm levels and other set-up functions.

B.2.2 Sensor
The instrument uses a state-of-the-art electrochemical cell for detecting carbon monoxide. The sensor has a
life expectancy of approximately two years. It is easily replaced and should be periodically calibrated as its
output diminishes during its life especially during the final months.

B.2.3 Display
The readout is a one line eight character backlighted LCD display located on the front panel. The display
shows the level of gas in PPM (parts per million) and flashes when in red alarm. It also displays prompt
messages during calibration or warnings such as low flow.

B-1