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make the 45UVFS1 scanner a logical choice for coal (when burning combination of gas/oil or gas/
coal), oil, and gas burners.
CAUTION: The only sure way to determine if a flame scanner will provide proper flame
detection and discrimination for a particular fuel type and burner type is to set up and test
the scanner under a number of varying operating conditions (e.g. varying firing rates).
CAUTION: The setting (high or low) of the automatic signal amplification circuitry is
stored as part of the flame signature file (File A, B, or C). Care should be taken so that a file
that has learned flame data associated with a gas flame (which requires high signal amplifi-
cation) is not used when detecting a coal or oil flame, since the high amplification could indi-
cate a flame on condition if any flame signal is present.
The following application chart is provided as an initial reference guide (or starting point) to select
the appropriate scanner for various flame scanning applications, based on burner type and fuel(s)
being burned.
The rating of the application chart (High, Medium, Low) compares the 45FS1 against the 45UVFS1
for each particular burner type. The ratings are not an absolute rating. For example, on a front-fired
gas burner, the 45UVFS1 scanner provides better flame detection/discrimination than the 45FS1
(High versus Medium). On an opposed fired gas burner, the 45UVFS1 is an even better choice (High
versus Low). However, the high rating of the 45UVFS1 on both front-fired gas and opposed-fired
gas does not mean the 45UVFS1 scanner will provide the same level of flame detecting/discrimina-
tion on both types of burners.
BOILER TYPE
FUEL TYPE
Discrimination Capability
45FS1
45UVFS1
FRONT FIRED
GAS
M
H
OIL
H
H
COAL
H
H
GAS/OIL
M
H
GAS/COAL
M
H
OIL/COAL
H
H
COAL/OIL/GAS
M
H
CORNER FIRED
GAS
L
H
OIL
H
H
COAL
H
H
GAS/OIL
L
H
GAS/COAL
L
H
OIL/COAL
H
H
COAL/OIL/GAS
L
H
OPPOSED FIRED
GAS
L
H
OIL
M
M
COAL
M
M
GAS/OIL
L
M
GAS/COAL
L
M
OIL/COAL
L
M
COAL/OIL/GAS
L
M
H = HIGH
M = MEDIUM
L = LOW
