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Model SS4-AUV/-AUV2 Ultraviolet (UV) Digital Electro-Optical Fire Detector
Installation Guide and Operating Manual
MAN0927_V3_1510-005_Rev H_06-13
1.4
Overview
1.4.1
Model SS4-AUV/-AUV2 Detector
Version SS4-AUV: There are two (2) LEDs on the Model SS4-AUV Detector that indicate the state of the
Detector. During normal operation both LEDs will blink every 10 seconds.
If the Detector alarms to a fire, it energizes the Fire relay and turns on both LEDs in the following
sequence. One LED is turned on immediately and the second LED will rapidly blink for several seconds
indicating that the Detector's FirePic spectra is being permanently stored in the Detector's solid-state
memory (FirePic is the several seconds of Detector spectral data which precedes an alarm event). Once
the FirePic data is stored, the second LED will remain on. For this version, the fire alarm LEDs turn on and
remain on until power to the unit is cycled (turned off and on again).
If the Detector has a Fault, it de-energizes the Fault relay and turns one (1) LED on (the LED will not light if
the Fault is a "No Power Fault"). If the Fault condition, such as a "Low Voltage Fault", is eliminated the
Detector will automatically return to Normal Operation.
NOTE: Faults caused by excessive input voltage or due to temperatures outside the operating temperature
range require factory re-certification. Re-certification is required if a Fault is indicated by both LEDs rapidly
blinking (with frequency about 2 Hz.).
Version SS4-AUV2: The operation of this unit is identical to the SS4-AUV, except the fire alarm LEDs turn
off once the fire threat is eliminated, without power cycling of the device.
1.4.2
Detection Range and Field-of View
The SS4-AUV/-AUV2 detection range is field adjustable between 15 and 60 ft. in 15 ft. increments to an
industry standard one square foot gasoline pan fire within 5 seconds.
The Detector incorporates a 120-degree conical Field of View. The fire emissions received by the Detector
diminish at extreme range and edges of the field-of-view. It is recommended that the Detector be pointed
at the fire threat area for the fastest response times to the smallest size fire. When multiple Detectors are
used to cover large areas, the Field-of-Views should overlap to insure complete coverage of the fire threat
area. The Field-of-View is not, however, limited to 120 degrees. Larger fires outside the 120 degree Field-
of-View may cause the SS4-AUV/-AUV2 to alarm. This is based on the Inversed Square Law for radiated
energy, a larger size fire outside the Detection Range and field-of-view may cause the Detector to alarm.
Refer to Figure 1.
1.5 Configuration Settings
The SS4-AUV/-AUV2 Detector may be reconfigured in the field and thus optimized for special applications.
The configuration of the Detector is set using DIP switches located on the middle circuit board of the
Detector Module. The DIP switch settings for each configuration are listed in Table 2.
These configurable options include:
120 Degrees
Figure 1: Field of View, Horizontal, and Vertical.
Sensitivity to 1 Sq. Ft. Gasoline Pan Fire
4
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