Description Of Start Up Sequence - Eclipse Linnox SP CCS-LS Installation Manual

Description of Burner
Operation
D
ESCRIPTION OF
S S
TART UP EQUENCE
The complete start-up sequence is controlled by the burner
programmer (This may be supplied with the burner or, it may be
installed in a separate control panel supplied by others).
The combustion chamber or ducting must be purged in
accordance with current standards prior to the burner start up
sequence.
After the start up signal to the burner, the combustion air blower
(3) will be energised. As soon as the combustion air pressure
switch (PA) is activated by sufficient combustion air pressure and
the micro switch in the control motor is closed, the burner
programmer starts to cycle.
The control motor will travel to its start position (20% of max.
capacity). Then the ignition transformer will be energised by the
burner programmer and a spark will be generated at the igniter
(9). The igniter is so called "gas supported" and is supplied
through a by-pass gas valve(13). To prevent condensation, both
flame rod or UV Cell and igniter are purged with combustion air,
branched after the first shut-off valve. To limit the purge air flow
a pressure regulator (12) is mounted in the purge air line.
At the same time that the igniter is energised, the first shut-off
valve (6) and the by-pass valve (13) open. A small support flame
will appear that will later help to ignite the main flame. The
support flame will extinguish after the main flame comes in.
The second safety shut-off valve (5) will next be energised. The
gas flows through both safety shut-off valves and the internal gas
ratio-regulator to the mixer unit, where it mixes with the com-
bustion air. The gas flow is controlled proportionally to the air
flow by the gas ratio-controller, which has been cross connected
to the air pressure and the mixture pressure to reach a stable
gas-air ratio, independent from process temperature and
pressure. The mixture is ignited at the burner base, after which
the flame is detected and monitored by a flame ionisation probe
or an ultra violet scanner (10).
Eclipse Linnox Model CCS-LS, Installation Guide 159, 2/20/04
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