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Page 6 D-<strong>LX</strong> <strong>700</strong><br />
To guarantee the best, most selective flame monitoring, one must determine the correct position of the<br />
scanner, since the flame must be visible to the flame scanner at all times, regardless of the load range<br />
of the burner. The 6° angle of view should always be ori<strong>en</strong>ted toward the root of the flame, that is, the<br />
bottom third of the flame.<br />
For optimal alignm<strong>en</strong>t of the flame scanner, the D-<strong>LX</strong> <strong>700</strong> uses a 4-20 mA (or 0-20 mA, if desired)<br />
curr<strong>en</strong>t output which displays the flame int<strong>en</strong>sity. Note: the curr<strong>en</strong>t output leads are not galvanically<br />
separated from the internal voltage supply. To avoid having faults attributed to the flame scanner,<br />
these leads may need to be shielded. As a rule, however, shielding is not required for cable l<strong>en</strong>gths<br />
below 15 ft (5 m).<br />
For high availability in the system, the power supply equipm<strong>en</strong>t and the flame scanner must be<br />
properly timed (power supply and maximum time for outages).<br />
!<br />
Wh<strong>en</strong> connecting the flame scanner, all local regulations must be observed.<br />
The flame scanner is equipped with a safety screw to <strong>en</strong>sure that the scanner<br />
is firmly in place. Always be certain that the flame scanner has be<strong>en</strong> mounted<br />
properly.<br />
6.1. Start-Up<br />
Once mounted and connected according to the drawings and diagrams in this manual, the D-<strong>LX</strong> <strong>700</strong><br />
Compact Flame Scanner is immediately ready for operation once power is supplied.<br />
7. Programming the Flame Scanner<br />
The flame scanner is equipped with a rocker switch for adjusting the flame recognition threshold of the<br />
flame relay. This threshold may be set to one of t<strong>en</strong> levels. The scanner is also equipped with a hook<br />
switch for adjusting the amplification of the photo curr<strong>en</strong>t to one of two differ<strong>en</strong>t levels. The rocker<br />
switch is accessible after removing the cover plate. The hook switch is still obscured by the housing<br />
ev<strong>en</strong> if the cover plate has be<strong>en</strong> removed, since it is only int<strong>en</strong>ded to be switched under special<br />
circumstances for damp<strong>en</strong>ing very high flame signals.
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