2.20.1
Central and Local, Medical Gas and Vacuum Alarm Panels
Central and local recessed mounted wall panel stations shall be provided
for the medical gas and vacuum services specified. The central panels
shall be located as indicated. Supplemental central panels shall be
located in the Control Room of the Heating Plant and Telephone Switchboard
Room or as indicated. Local panels shall be located adjacent to nurses
stations, control stations, or as indicated. Each panel shall contain
signal lights, buzzer, silencing push button, test push button, and gauges,
suitably identified. Signal lights shall be red and shall be wired to
indicate the following:
Oxygen Liquid Low
Notify A&D
Oxygen Reserve in Use
Notify A&D
Oxygen Reserve Low
Notify A&D
Oxygen Line Pressure
High/Low
Nitrous Oxide Reserve in Use
Notify A&D
Nitrous Oxide Reserve Low
Notify A&D
Nitrous Oxide Line Pressure
High/Low
HP Nitrogen Reserve in Use
Notify A&D
HP Nitrogen Reserve Low
Notify A&D
HP Nitrogen Line Pressure
High/Low
Medical Air Line Pressure
Low
Dental Air Line Pressure
Low
Medical Vacuum Line
Low Vacuum
Anesthesia and Oral
Low Vacuum
Evacuation Vacuum Line
One green light per panel shall be provided to indicate that all medical
gas systems are normal. Medical vacuum alarm shall be actuated when the
vacuum drops to 34 kPa 10 inches of mercury vacuum. Anesthesia and oral
evacuation vacuum system alarms shall be actuated when the vacuum drops
below 27 kPa 8 inches of mercury vacuum. Anesthesia evacuation active type
systems utilizing vacuum pumps shall be provided with an alarm system;
passive type systems that utilize room heating, ventilating, and air
conditioning exhaust systems do not require an alarm system. Medical gas
high/low pressure alarms shall be actuated when the line pressure reaches
approximately 20 percent above or below normal operating pressure. Alarms
shall be activated by the pressure of the line being monitored. A buzzer
shall sound upon actuation of any alarm signal. The buzzer shall be
provided with a reset relay that shall shut off only the buzzer and not
affect the signal light, until the condition is corrected. The buzzer
shall sound again upon actuation of any additional alarm.
SECTION 15405A
Page 62
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