Air Duct Monitoring Housings
Installation Instructions
Models 8741, 8742 and 8743
P/N 315-049708FA-4
INTRODUCTION
Models 8741, 8742 and 8743 are air duct monitoring hous-
ings containing sampling tubes. When used with a compat-
ible smoke detector, smoke and combustion products are
detected for shutdown of the duct system and/or operation
of supplementary equipment as provided by the system
control panel. See the following chart for usage.
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FFFFFor
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compatible control equipment,
ible control equipment,
ible control equipment,
ible control equipment,
ible control equipment, see c
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harts on the page
ts on the page
ts on the page
ts on the page
ts on the page
111112 of this manual.
2 of this manual.
2 of this manual.
2 of this manual.
2 of this manual.
TECHNICAL DATA
AIR DUCT CONDITIONS
Temperature Range:
32
O
F (0
O
C) - 100
O
F (38
O
C) per UL 268/268A
Altitude Range:
8741, 8742 and 8743 — No altitude limitations
Relative Humidity Range:
10-85% (non-condensing/non-freezing)
Air Duct Velocity Range:
100-4000 ft/min – 8741, 8742 and 8743
Sampling Tube Pressure Range of Differences:
Greater than 0.01 and less than 1.2 inches of water column
These air duct detectors are designed for detection and
control of products of combustion in a duct system. They
They
They
They
They
are not to be used for
are not to be used for
are not to be used for
are not to be used for
are not to be used for open area prot
open area prot
open area prot
open area prot
open area protect
ect
ect
ect
ection.
ion.
ion.
ion.
ion.
DO NOT USE air duct detectors with Alarm Verification.
