26
GROUNDING AND SHIELDING TECHNIQUES
FOR USE ON SCANNERS OR SCANNER CABLE LOCATED WITHIN 12" OF A HIGH
ENERGY OR HIGH VOLTAGE SOURCE.
1.
Connect a safety ground to scanner housing (Figure 13 & 14).
2.
The scanner and scanner cable MUST be located at least 12" from the ignition source.
3.
Run a ground wire from the ignition transformer chassis to the ignitor assembly.
4.
Replace all frayed, cracked, or dirty (oily) ignition wire. Ignition wire must be in good working
condition.
5.
Electrically isolate the scanner from the burner using the surface mounting flange with integral
heat-insulating female thread insert.
6.
Cooling/Purge Air must be electrically isolated from the scanner (e.g. isolated short rubber
hose)
.
PROGRAMMING THE INSIGHT II SCANNER
Keypad/Display:
The InSight II flame scanner uses a two (2) line x six-
teen (16) character alphanumeric VFD Display and five
(5) pushbuttons to review and program the various set-
points and operating parameters. The functions of the
pushbuttons are:
UP/DOWN
The UP and DOWN buttons are used to scroll through
the scanner menus. When in the EDIT menu, after
selecting a setpoint to edit, (see SELECT button), the UP
and DOWN buttons are used to change that setpoint.
SELECT
When in the EDIT menu, the UP / DOWN buttons are used to display the setpoints. Depressing the
SELECT button displays the stored value of the setpoint, allowing it to be changed.
PROGRAM
The PROGRAM button saves a change made to a setpoint. It is also used to execute the Auto Tune
function.
Note: Depressing and Holding the PROGRAM key for four (4) seconds will cause the scanner to
RESET (flame relays and fault relay will de-energize). Normal operation will be restored once the
PROGRAM button is released.
HELP
Pressing the Fireye logo will display expanded text in the Main Status Menu.
SCANNER TO CONTROL ROOM
SHIELDING TECHNIQUES
Scanner with scanner cables (59-546, 59-547)
wired directly back to burner management sys-
tem. See below for remote communications.
Connect braided shield of 59-546, 59-547 cable to earth ground at power supply.
REMOTE COMMUNICATIONS: LESS THAN 200 FEET
Scanner with scanner cables (59-546, 59-547)
wired directly back to control room.
Connect braided shield of 59-546, 59-547 cable to earth ground at power supply.
REMOTE COMMUNICATIONS: GREATER THAN 200 FEET
RS485 communications for scanners wired in a
multi-drop configuration (Belden 9841) using
wiring harness or junction box.
Connect braided shield of 59-546, 59-547 to earth ground at power supply. Twist
together and tape (to electrically isolate) shield drains from Belden 9841 cables
inside each wiring harness or junction box. Connect to earth ground at RS485
source (e.g. IBM computer).
