Eclipse Winnox WX Series v1 Design Guide No. 111, 9/25/2008
12
All standard Winnox burners are designed for:
air:gas ratio controlled combustion
•
50% excess air at high fire
•
higher excess air at low fire
•
Burner Control
Winnox burners come with a ratio regulator that maintains the
air:gas ratio. An integral minimum fuel bypass line is used to
maintain and control a reliable low fire input flow.
Figure 3.4 Basic Burner Components
A control signal is sent from a process temperature controller
•
(sold separately) to the control motor. (Refer to Bulletin 818C
or contact Eclipse for further information on temperature
controllers.)
Figure 3.5 Basic Control Loop
The control motor modulates the integral air butterfly valve
•
(BV) which
controls the combustion air flow.
Air pressure in the burner body sends an impulse down the
•
loading line to the ratio regulator.
The ratio regulator controls the gas flow in proportion to the air
•
flow.
Warning:
Do not use other control methods, such as, a fixed-air
control, and do not alter the ratio regulator or burner
piping without prior approval from Eclipse.
Step 3:
Control
Methodology
Integral Air BV
Minimum Fuel
By-Pass Line
Control Motor
Ratio Regulator
Heat
Gas
Air
Stoichiometric
Rat
io c
ont
rol
op
era
tio
n
Excess
air
Figure 3.3 Air:Gas Flow
Control
Signal
Gas Flow
Process
Set Point
Process
Controller
Control
Motor
Integral air
BV
Ratio
Regulator
er
ut
ar
ep
me
T
er
uss
er
P Impulse
