INTRODUCTION
Faraday Detector Models 8840 and 8839 are System LW-400, System
LW-401, System LW-450, System LW-500 and MPC-600 compatible air
duct detectors. They are designed for use in heating, ventilating, and air
conditioning duct systems to detect the presence of combustion products
in a duct system. (Refer to TECHNICAL DATA below for air duct operating
conditions.)
When smoke or combustion products are detected, shutdown of the duct
system and/or operation of supplementary equipment is provided by the
related system control panel with the 8840.
TECHNICAL DATA
TABLE 1
AIR DUCT CONDITIONS
Temperature Range: 32
O
F (0
O
C) - 100
O
F (38
O
C) per UL 268/268A
Altitude Range: 8840 and 8839 — No altitude limitations
Relative Humidity Range: 0-93% (non-condensating) per UL 268-268A
Air Duct Velocity Range: 300-4000 ft/min – 8840 and 8839
Sampling Tube Pressure Range of Differences:
.01-1.0 inches of water column
CAUTION: These air duct detectors are designed for detection and con-
trol of products of combustion in a duct system. They are not
to be used for open area protection.
DO NOT USE air duct detectors with Alarm Verification.
INSTALLATION/WIRING INSTRUCTIONS
AIR DUCT DETECTOR
Models 8840 AND 8839*
FARADAY
*See Compatible Control Equipment Table on the last page.
P/N 315-095659FA-3
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