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CABLE SPECIFICATION:
Specification: P/N 59-546:
Multi-core, 8 conductor (color coded), with foil wrap and overall braided shield.
PLTC-ER rating
Eight #18 AWG
Temperature Rating: - 40° F to +221°F (-40°C to +105°C)
Cable Jacket: PVC
Nominal O.D. 0.44" (11.2 mm)
Maximum O.D. 0.48" (12.2 mm)
INSTALLATION NOTES
The Phoenix flame scanners determine the presence or absence of flame by monitoring the amplitude of
the flame across a wide flicker frequency spectrum. The scanner should initially be mounted so that the
primary combustion zone is within the scanner’s line of sight.
The location and sighting instructions listed in the following sections are rough guidelines for the location
of the scanner. The scanner provides feedback via LEDs and the 4-20ma output to assist in the adjustment
and proper alignment of the flame scanner. Refer to the set-up procedures described in this bulletin.
Note: An acceptable scanner location must ensure the following:
Reliable main flame and/or ignitor flame detection at all air flow and furnace loads (ranges
of fuel firing).
Rejection of the ignitor flame if too short or in the wrong position to ignite the main flame
reliably, thus prohibiting the delivery of fuel to the burner.
Note: Ensure the correct FFRT (Flame Failure Response TIme) is selected prior to commissioning.
INSTALLATION PROCEDURE
1.
The best results are obtained when the scanner is aimed so that the scanner’s line of sight inter-
sects the burner center at a slight angle (e.g. 5 degrees) and sees a maximum of the primary com-
bustion zone, as shown in Figure 3. If only one scanner is used per burner, the line of sight
should also intersect the igniting flame.
2.
For installations where separate scanners are used to monitor main and ignitor flames, the main
flame scanner should be sighted so it does not detect the ignitor flame.
3.
The scanner should have an unrestricted view of flame as far as possible. Physical obstructions
such as air register blades, interfering vanes, or other hardware should be cut away or notched so
they do not fall within the scanner’s line of sight as shown in Figure 3.
Note: Always check with the burner manufacturer before you trim the register blades.
Note: When installing flange 35-318-1 or 35-318-2, only torque to 60 in/lbs (5 ft/lbs or 6.8Nm) on
the sight pipe or damage can occur. (Hand tight plus 1 turn max)
WARNING: Protective filtered lenses should be worn when viewing flame; infrared and
ultraviolet energy from the flame can be damaging to the eyes.
