Product Overview

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45UV5-1005, 1105
1. Up to 25 foot conduit run.
— Use #18 AWG or heavier, 600V 90C minimum rated wire, installed in conduit.
2. Over 25 to 300 feet maximum:
— Use #18 AWG or heavier, 600V, 75C rated wire for the two black leads (shutter).
— Extended Scanner Wiring. For extended scanner wiring up to 1500 feet, and for shorter
lengths to reduce signal loss, use a shielded wire (Belden 8254-RG62U) coaxial cable, or
equal for each red wire of the 45UV5. The ends of the shielding must be taped individually
on both ends and not grounded.
For multiple burner installations:
3. Distances are decreased when more than one set of scanner leads are installed in a common con-
duit. For example, the maximum distance for 2 scanners is 750 feet and for 3 or more scanners
the distance decreases to 500 feet.
4. High voltage ignition wiring should not be installed in the same conduit with flame detector
wires.
ALIGNMENT AND ADJUSTMENTS
The following procedures are recommended to ensure optimum flame detection and discrimination.
Flame discrimination is the ability to see only one burner or one pilot with other burners or pilots
operating nearby. These procedures should be used whenever parts are replaced, when the scanner
has been moved, when the flame shape is altered (additional fuels, new burners, burner/register mod-
ifications) as well as on all new installations.
Pilot Flame Scanner
1. Apply power to scanner and associated control.
2. Start pilot.
3. Adjust scanner sighting to detect pilot flame in the manner shown in Figure 4.
4. When flame is properly sighted, the flame signal should correspond to the acceptable ranges
indicated in the appropriate bulletin for each compatible FIREYE control. If readings fluctuate
widely, readjust scanner sighting until highest, steadiest reading is obtained.
5. When the proper signal reading has been obtained, make sure that the scanner and the associated
control do not respond to the ignition spark. This is accomplished by cutting off the fuel to the
pilot and attempting to start the pilot using the spark igniter. If the system responds to the spark,
the sighting should be realigned.
Main Flame Scanner
1. Apply power to scanner and associated control.
2. Start pilot.
3. Adjust scanner sighting so that ignition spark and pilot flame are not detected. Test should be
conducted with maximum pilot flame and with both minimum and maximum airflow.
4. Start main burner.
5. Adjust scanner sighting to detect main burner flame. When sighting is correct (see above), the
signal should be read in the acceptable range for the control in use, without extreme fluctuations
6. When proper signal is established, manually close off the main burner fuel supply. When burner
flame becomes unstable or is extinguished, the control should register a “flame failure” condi-
tion.
7. Start an adjacent burner and vary its firing rate under normal airflow conditions. Make certain
that the main flame scanner on the burner not in service does not respond to adjacent burner
flame. Readjust sighting if necessary.
CAUTION: Minimum pilot is the minimum flame required to satisfactorily ignite the main
burner. Be sure to test for reliable signals under maximum airflow conditions when the pilot