1-7
MEGA3 NFPA Medical Gas Notification System
4107 9016 59.03
1.5.3 Gas Combination Alarms
Gas Combination alarms include the follow-
ing modular components:
• B1X, B60 or B65 boards
• 4-20 mA Combination - Can be added to
any alarms (if room)
Combination alarms can monitor 30
switched inputs.
Optional dry contact relays are available for
all signals.
Combination alarms can also monitor up to 6
digital gas sensors.
Figure 13: Area Alarm Front Panel
Model Number Scheme:
____ - ________ - __ -_____
Series - Configuration - Gas - Retrofit
See Model Number Chart on Section 1.6.
Example
:
MEGA3 Combination
20X 16Y 8D OVOV
Example Model Number
: M3-C21-OVOV
Model Number Scheme:
____ - ________ - __ -_____
Series - Configuration - Gas - Retrofit
See Model Number Chart Section 1.6.
Example
:
MEGA3 Area OAV
Example Model Number
: M3-A10-OAV
Figure 14: Combination Alarm Front Panel
Figure 12: Remote Sensors
Copper tubes
connect to pressure/
vacuum pipelines
Sensor modules are
mounted outside alarm
rough-in
