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Step 4:
Flame monitoring
system
U.V. scanner
1
A flame monitoring system consists of two main parts:
•
A flame sensor
•
Flame monitoring control
Flame sensor
There are two types that you can use for a ThermJet burner:
•
U.V. scanner
•
Flame rod
A U.V. scanner can be used with all combustor types.
You can find information in:
•
Info Guide 852 for 90º U.V. scanners
•
Info Guide 854 for straight U.V. scanners
•
Info Guide 856 for self-check U.V. scanners.
Note:
Flame rod option is not available for the TJ300 and larger
•
The standard flame rod is used with natural gas and pre-
heated air up to 300ºF.
•
The high-grade flame rod is used with propane, butane, and
preheated air up to 700ºF.
You can find more information in Info Guide 832.
Flame Monitoring Control
The flame monitoring control is the equipment that processes
the signal from the flame rod or the U.V. scanner. For flame
monitoring control you may select several options:
•
Flame monitoring control for each burner: if one burner
goes down, only that burner will be shut off
•
Multiple-burner flame monitoring control: if one burner
goes down, all burners will be shut off
There are three recommended flame monitoring controls:
•
Bi-flame series; see instruction manual 826
•
Multi-flame series 6000; see Instruction Manual 820
•
Veri-flame; see Instruction Manual 818
Other manufacturers' flame monitoring systems can be used
with the burner if spark is maintained for a fixed time interval
and is not interrupted when a flame signal is detected during
trial for ignition.
Eclipse ThermJet Design Guide No. 205, 3/5/07
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