Step 6: Main Gas Shut-Off Valve Train - Eclipse RA Series Design Manual

Step 5: Flame Monitoring
Control System
(Continued)
Step 6: Main Gas Shut-Off
Valve Train
14
Flame Monitoring Control
The flame monitoring control is the equipment that processes the
signal from the flame rod or the UV 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 manufacturer's 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.
Component Selection
Eclipse can help in the design of a main gas shut-off valve train
that satisfies the customer and complies with all local safety
standards and codes set by the authorities within that jurisdiction.
Contact Eclipse for further information.
Note:
Eclipse supports NFPA regulations (two gas shut-off
valves as a minimum standard for main gas shut-off
systems).
Valve Train Size
Fuel pressure supplied to the ratio regulator inlet must be within
the range specified in the RatioAir datasheet. The valve train
should be sized sufficiently to provide the specified pressure.
Warning:
Do not operate RatioAir burners with gas inlet
pressure less than the minimum listed on the RatioAir
datasheet. Lower gas inlet pressure may cause the
ratio regulator to remain fully open at lower inputs
as the burner transitions from low to high fire. This
could result in the possible accumulation of unburned
fuel in the burner which, in extreme situations, could
cause a fire or an explosion.
Eclipse RatioAir v1 Design Guide No. 115, 11/12/2008