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Viking takes no responsibility for installation and/or use of its equipment if it is not in accordance
with the appropriate issue and/or amendment of the manual. Viking reserve the right to change or
revise the information contained herein without notice and without obligation to notify any person or
organization of such action.
Only those parameters and configurations highlighted with the FM diamond (
tested and approved by Factory Mutual.
Warning
Do not open the detector assembly in a hazardous area. The detector contains limited serviceable
components and should only be opened by trained personnel.
Caution
The wiring procedures in this manual are intended to ensure functionality of the device under
normal conditions. Due to the many variations in wiring codes and regulations, total compliance to
these ordinances cannot be guaranteed. Be certain that all wiring complies with all local ordinances.
If in doubt, consult the authority having jurisdiction before wiring the system. Installation must be
done by trained personnel.
Caution
To prevent unwanted actuation or alarm, extinguishing devices must be inhibited/isolated prior to
performance testing or maintenance.
Detector Orientation
Detectors should be mounted with the earth stud directly below the lens.
Detector Positioning
Detectors should be positioned to provide the best unobstructed view of the area to be protected.
The following factors should also be taken into consideration:
Identify all high-risk fire ignition sources. Ensure that enough detectors are used to adequately
cover the hazardous area.
Locate and position the detector so that the fire hazard(s) are within both the field of view and
detection range of the device.
For best performance, the detector should be mounted on a rigid surface in a low vibration area.
Extremely dense fog or blizzard conditions could eventually block the vision of the detector.
For indoor applications, if dense smoke is expected to accumulate at the onset of a fire, mount the
detector on a side wall approximately 3 to 6 ft (1 to 2 m) below the ceiling.
The VSF303 has three sensitivity settings, which may be changed via a Viking application.
The flame detector carries out continuous internal hardware diagnostic testing to ensure correct
operation is relayed to the control system.
The VSF303 is not designed to annunciate diagnostic failure of signal returns via external wiring.
Control systems and fire panels generally have fault monitoring for such an eventuality.
This document is strictly private and confidential, reproduction without Viking Corporation approval is prohibited. © 2021 The Viking Group Inc.
VSF303 Flame Detector
Safety and Technical Manual
Form No. F_020521
Rev: 2
7
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