24
£
WIRING
Attach the cable supplied with the scanner to a junction box. Splice the cable wires to a pair of wires
not smaller than #l8. Install the complete run in a separate conduit to the control. Continuous conduit
bonding between scanner and the control is mandatory! Scanner may be located up to 100 feet from
control. Do not pass scanner wiring through any junction box containing other wires. Do not run
other wires through scanner conduit. Asbestos insulated wire should be avoided.
9.
To avoid nuisance shutdowns, it is important to avoid sighting hot refractory and to keep scanner
temperature low below 140° F (60°C).
10.
When the proper position has been established, drill a hole through the furnace wall and install a
4" to 8" length of threaded l/2" black iron pipe on which to mount the 48PT2 scanner.
11.
When satisfactory sighting position has been confirmed by operating tests, the sight tube should
be firmly welded in place.
OPERATION - IR LEARN
The BurnerLogix IR system employs an innovative flame detection method that allows the user to
adapt the operation of the amplifier to the actual burner environment and fuel type separately during
pilot trial for ignition and the main firing period. That is, the firing characteristics of the fuel provides
the BurnerLogix infrared detection system amplitude and radiation levels so that optimum flame on
and flame off thresholds can be set during the LEARN process.
‘Out of the box’, the BurnerLogix IR system is shipped with its sensitivity and thresholds set to
detect most firing conditions. The purpose of the LEARN process is to trim the sensitivity, either
upward or downward, to the level required for reliable flame detection and most importantly for an
overall improvement in detecting a flame out against various background conditions.
The LEARN process allows the BurnerLogix system to better differentiate between real and simu-
lated flame conditions. Simulated flame can usually be caused by burner throat modulation, radiation
from the refractory tiles, or steam atomization. The result of this technique of flame detection assures
a positive flame out response under both usual or adverse conditions.
The LEARN process in the BurnerLogix system is initiated through the keypad display module. To
take advantage of the BurnerLogix IR technique, it is suggested this be done as part of the installa-
tion process or when the 48PT2 scanner is changed. The menu item is located under the PROGRAM
SETUP menu and is called DO IR LEARN. Refer to the section titled
‘SETTING PROGRAM-
MER PARAMETERS’
for information on setting operational values. Since the default value is NO,
the user must modify this value to YES.
MDFY TO CHANGE
DO IR LEARN YES
CENTER LINE
OF MAIN FLAME
SCANNER
LINE-OF-SIGHT
SCANNER TARGET
ABOVE REFRACTORY
COMBUSTION
CHAMBER
PILOT
BURNER
SCANNER
SCANNER
SIGHTING TUBE
MAIN
BURNER
SCANNER MUST NOT
SIGHT REFRACTORY
