Application guidelines – Det-Tronics R7495D UV/IR Flame Detection System User Manual

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vidual application, taking into account all possible vari-
ables (see the Application Guidelines” section for a dis-
cussion of of these factors).

Typical response distances of the C7052J Detector to
various fuels are listed in Table 1. Each liquid fuel fire
(acetone, diesel, gasoline, methanol, and toluene) con-
sisted of approximately one pint of fuel burned in a 1
foot by 1 foot steel pan unless otherwise noted. The
excelsior (wood shaving) fire consisted of one pound of
wood shavings. The wood fire consisted of a 10-inch by
10-inch crib (wood stack). The methane fire was per-
formed to FM standard, with the flame approximately 30
inches high and 6 to 8 inches in diameter. The detec-
tors were sited to observe the fire at center axis ±10
degrees. The controller sensitivity and time delay set-
tings were 4 counts per gate, 4 consecutive gates, and
0.25 second gate lengths.

APPLICATION GUIDELINES

Certain guidelines must be followed when using any
type of sensing device as a fire detector. This involves
not only recognizing the strengths and advantages of a
particular device, but also understanding its limitations.

It is also important to note that in any system that uses
two or more sensors to produce a fire signal, the detec-
tor will be disabled should one of its sensors fail. The
Automatic oi feature will warn of such failure. Routine
manual testing and checking of the system is recom-
mended for increased system reliability.

A1020

10.0 INCHES (254 MM)

2 INCHES

(50 MM)

7 INCHES

(177 MM)

95-8331

Figure 6—Controller Dimensions in Inches (Millimeters)

5-1/4 INCHES

(133 MM)

2-1/2 INCHES

(64 MM)

MOUNTING BASE

1/2 INCH NUT USED TO ADJUST
ELBOW TO DESIRED ANGLE

1-3/8 INCH NUT USED TO ROTATE
SWIVEL/DETECTOR ASSEMBLY
TO DESIRED POSITION

3/4 INCH NUT USED TO
SECURE DETECTOR
BRACKET TO SWIVEL MOUNT

JUNCTION BOX MOUNTING
BRACKET (ATTACHES
WITH TWO ENCLOSED
FLATHEAD SCREWS)

2–1/2 (64 MM) DIA.

0.25 (6.4 MM)

DIA. (3)

120

(2)

2.00 (50.8 MM) DIA.

B1303

Figure 7—Q9001G Swivel Mounting Bracket Dimensions