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Eclipse RatioMatic v3.00 - Design Guide No. 110, 4/98
3-3
Combustor Length
Select a combustor length. Optional lengths are available on
some models. Nozzle position will vary with combustor length.
The nozzle position determines the location of heat release.
Control Motor
Select a control motor. Standard control motor options include
various models which Eclipse will mount to the burner.
RatioMatics can be ordered with control motor bracket and
mounting hardware only. Customer supplied control motors
must conform to the these specifications:
•
rotation not to exceed 2 rpm.
•
minimum torque of 25 in-lb. (2,8 Nm)
•
90° stroke.
•
continuous modulating or high/low modulating control.
•
reversible direction of rotation.
•
certain applications may require control motors with a
limit switch or switches if:
- the burner capacity is to be limited to fit an
application.
- the chamber is to be fired with positive or negative
pressure.
- the chamber pressure is outside the range -1” w.c.
to +1” w.c. (-2,5 to 2,5 mbar)
- there is a need to indicate a high and/or low fire air
butterfly valve (BV) position.
Burner Configuration
Select configuration.
Gas Pipe Connection
Select the gas pipe connection including the pipe thread type and
the turndown required.
The piping, burner gas inlet, and ratio regulator are threaded
using the customer selected pipe thread option.
The high turndown option includes a ratio regulator with an
adjustment for lower inputs.
Flame Supervision
Select a flame rod or an ultraviolet (U.V.) scanner. Both are
available on all RatioMatics. If a flame rod is selected, it will be
factory mounted in the burner. If a U.V. scanner is selected, it
must be ordered separately.
Warning:
A U.V. scanner could possibly detect another burner’s
flame if it is in the line of sight, and falsely indicate flame
presence. Use a flame rod in this situation. This helps
prevent accumulation of unburned fuel which, in extreme
situations, could cause a fire or an explosion.
Nozzle
Combustor
length
Combustor
Inverted
right hand piping
Upright
left hand piping
Upright
right hand piping
Configuration selections:
Inverted
left hand piping
Nozzle
position