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Introduction
The VPR-SD1 is an aspirating smoke detection system that utilizes an air-sampling pipe network to draw air
towards analog addressable point detectors installed inside a sealed enclosure.
The single channel VPR-SD1 detector enclosure (Figure 1-1) has one pipe inlet and provision for one or two point
detectors allowing for redundant or double-knock detection. The range of supported point detectors is detailed in
Section 2.3.1 on page 10.
Figure 1-1: VPR-SD1 Detector Enclosure
Point detectors are wired directly into the Signaling Line Circuit (SLC), which provides connectivity to the fire alarm
control panel for the reporting of alarms or faults originating from a point detector.
The detector enclosure provides a configurable aspiration system and airflow monitoring. Airflow status is displayed
on a ten element bar graph with adjustments for flow sensitivity and high/low flow thresholds. Flow faults are
indicated on the display interface LEDs, and reported to the fire panel via isolated dry relay contacts.
Note:
The VPR-SD1 system has been tested and listed to UL 268 and UL 268A and must be installed in strict
compliance with these instructions to maintain the UL listing.
Hochiki America Corporation
FireNET Vapor VPR-SD1 Product Guide
www.hochiki.com
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