30 percent of LEL. Combustion air should be less
than 30 percent of LEL.
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A combustible gas analyzer, with a minimum of four in-line sensors,
calibrated to methane shall be located in the control panel.
2.18.1
Lower Explosive Limit (LEL)
The lower explosive limit of the fuel and of the off-gas shall be
continuously indicated. The lower explosive limit of the off-gas shall be
continuously recorded.
2.18.2
Upper Explosive Limit (UEL)
The upper explosive limit of the combustion air and of the off-gas shall be
continuously indicated.
2.19
OXYGEN METERING AND MAKE-UP AIR CONTROL
2.19.1
Oxygen Meter
The upper oxygen level of the combustion air and of the off-gas shall be
continuously indicated.
2.19.2
Methane Monitor
The methane level of the combustion air and of the off-gas shall be
continuously indicated.
2.20
OPERATING INDICATORS AND ALARMS
Simulated running lights to indicate normal operating conditions and alarms
shall be displayed at the control panel.
2.20.1
Visible Alarms
Each visible alarm shall be indicated at the control panel and by a red
light at the device.
2.20.2
Audible Alarms
Each audible alarm shall be located at the device.
2.20.3
Remote Alarms
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NOTE: The Contractor should respond to alarms for
the duration of the contract.
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Remote alarms shall activate the programmable auto dialer. A prerecorded
message shall provide specific information to the operator about the alarm
condition. At contract close out, the dialer shall be reprogrammed to the
number indicated by the Contracting Officer.
2.21
ELECTRICAL WORK
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SECTION 11378
Page 26
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