Datasheet

10
Eclipse RatioMatic Burner, RM Series, V5, Design Guide 110, 11/11/2011
The possibility exists where the low fire settings are
insufficient to ignite the burner within the maximum trial for
ignition time. The following options must be considered
under these conditions:
• start at higher gas input levels
• resize and/or relocate the gas controls
• use bypass start gas
Ignition Gas Piping
RatioMatic burners are capable of ignition with either low
fire or bypass start gas.
Figure 3.7. Low Fire Start
Figure 3.8. Pilot Start (Optional)
An optional fuel orifice meter connected in the start gas
piping can simplify start-up and adjustment. To start the
burner at the lowest possible gas input, select a fuel orifice
meter for 5" to 10" w.c. pressure drop when the gas flow
is at the burner’s rated low fire.
Step 5: Flame Monitoring Control System
The flame monitoring control system consists of two
main components:
• Flame Sensor
• Flame Monitoring Control
Flame Sensor
Two types can be used on a RatioMatic Burner:
• Flame rod
• UV scanner
Flame rods are available on models RM0050 through
RM0700 burners with alloy or SiC tubes. Further
information about flame rods can be found in:
• Info Guide 832
A UV scanner can be used on all RatioMatic Burner sizes.
The UV scanner must be compatible to the flame
monitoring control that is used. Refer to the manual of
your selected control for proper selection of the scanner.
Flame Monitoring Control
The flame monitoring control is the equipment that
processes the signal from the flame sensor and controls
the start-up and shut-down sequences.
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
Eclipse recommends the following flame monitoring
controls:
• Trilogy series T400; see Instruction Manual 830
• Veri-Flame series 5600: see Instruction Manual 818
• Bi-Flame series 6500: see Instruction Manual 826
• Multi-Flame series 6000; see Instruction Manual
820
■ If other controls are considered, contact Eclipse to
determine how burner performance may be
affected. Flame monitoring controls that have
lower sensitivity flame detecting circuits may limit
burner turndown and change the requirements for
ignition. Flame monitoring controls that stop the
spark as soon as a signal is detected may prevent
establishment of flame, particularly when using UV
scanners. The flame monitoring control must
maintain the spark for a fixed time interval that is
long enough for ignition.
DO NOT USE the following:
• Flame monitoring relays which interrupt the trial for
ignition when the flame is detected.
• Flame sensors which supply a weak signal.
• Flame monitoring relays with low sensitivity.
Main gas
shut-off
valve train
Main gas
shut-off
valve train
ptional fuel orifice meter recommended
NOTICE