Model SS4-AUV/-AUV2 Ultraviolet (UV) Digital Electro-Optical Fire Detector
Installation Guide and Operating Manual
MAN0927_V3_1510-005_Rev H_06-13
6
SECTION 2
INSTALLATION
2.1
Installation Instructions
This section describes the installation of the Model SS4-AUV/-AUV2 Detector for the Stand-Alone relay
mode. It is recommended that junction boxes be used to wire the Detectors. Determine the configuration
settings for the device(s) and the number of connections to be used (Fire, Fire Verify, Fault, and Power)
depending on desired Detection Range and Fire Control Panel type used (refer to the Fire Control Panel
Manual).
2.1.1
Installation Precautions
The following precautions should be observed during installation of Model SS4-AUV/-AUV2 Detectors.
1.
Make sure that the external electrical power is turned
OFF
before connecting the Detector
.
2.
Printed circuit board components of the Detector are susceptible to damage from electrostatic
discharge.
Do not handle the Detector's module (and its printed circuit boards)
without
adequate grounding and observing all necessary measures to prevent the effect of electrostatic
discharge (ESD).
2.1.2
Conduit Installation
When planning the conduit, follow these recommendations.
1.
If only one of the two 3/4 inch NPT conduit openings on the Model SS4-AUV/-AUV2 Detector
enclosure is used, seal the unused opening with a threaded plug and approved sealing material.
2.
In areas where moisture may accumulate, install an approved conduit trap or drain.
3.
A seal shall be installed 6” from the
enclosure wall
for all applications requiring a Class I, Div. 1
Explosion-Proof rating.
2.1.3
Wiring Recommendations
To prevent intermittent connections, Fire Sentry Corporation recommends using junction boxes. Install a
junction box near each Detector location. Wire each Detector to its junction box. Use screw-down
terminal strips inside the junction box to make the connections from the Detector's terminals to an FM
Approved or UL listed Fire Alarm Panel. Also use FM/UL Approved junction boxes and terminal strips.
NOTE:
Avoid wire splices. However, if wire splices are necessary, all splices should be soldered.
Utilization of good wiring practices will simplify installation, improve reliability, and facilitate maintenance.
2.1.4
Power Supply Considerations
The Model SS4-AUV/-AUV2 Detector uses 24 Volts DC at a maximum current of 50 mA (with the 4-20 mA
option the maximum supply current is 70 mA). Make sure that the Panel's power supply can handle the
load current of the total number of Detectors connected to it. For example, if 10 (ten) SS4-AUV/-AUV2
Detectors are used on a single Panel's power supply (multiply 50 mA 10 times); the power supply must be
able to handle at least 500 mA + 10% (0.50 A + 10%). This load current must also be considered when
calculating the Panel's requirements for 24-hour power backup.
2.2
Installation Procedure
2.2.1
Configuring and Wiring Detectors
To configure and wire a Model SS4-AUV/-AUV2 Detector, or to replace the Detector module, the module
must be removed from the enclosure. After the configuration settings and wiring connections have been
completed, the module should soon be re-installed in the enclosure to avoid contamination from the
environment.
NOTE:
Avoid touching the Detector sensors at the front of the Detector modules.
If touched
accidentally, they should be cleaned per instructions of Section 3.2.