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ページを印刷する[3] GENERAL DESCRIPTION
Smoke entering the duct system will be dispersed throughout the whole building. The UG-7-A6O Duct Detectors
utilizes the photoelectric sensing method and is designed to sense the existence of smoke in the duct. This design
of the housing along with the detector technology is capable of detecting unsafe conditions by sampling the air
through the duct, when the smoke is detected, it will emit a signal that will create the urgency for proper action
to be taken to turn off circulating fans, blowers and any other auxiliary devices that are connected to the system.
The actions taken will enable the management of hazardous smoke through the entire space that is being
protected by the duct detection arrangement.
The UG-7-A6O has two versions that operates with 24 VDC/VAC or 120 VAC. The UG-7-A6O-24V for the 24
VDC/VAC and the Model UG-7-A6O-120V for the 120 VAC versions. Alarm and supervisory relay contacts
are accessible to interface with control panel, HVAC control, and multiple auxiliary functions including turning
off the fan.
[3.1] UG-7-A6O FEATURES:
- High efficient single sampling tube
- Easy to install
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[4] DUCT SMOKE DETECTOR KIT CONTENTS
1. Detector/power board assembly and covers
2. Three metal screws for mounting
3. One sampling tube end plug
4. Installation manual (this document)
NOTE: Cable glands are not included in the kit.
NOTE: A sampling tube must be ordered to complete the installation.
approx 90% of the width of the duct.
widths.
Table 4.1
Sampling tube
Length of sampling tube
ST1
1 ft.
ST2
2 ft.
ST5
5 ft.
ST9
9 ft.
At velocities below 300ft./min the model UG-7-DV-T2 diverter (Figure 1: Item A1, ordered separately) needs
to be installed for normal operation. For velocities above 300ft./min the model UG-7-T2 diverter is not required
for normal operation.
[5] INSTALLATION
Check the air flow direction and velocity. The UG-7-A6O detector is designed to be used in air handling systems
with air velocities of 100 to 4000 feet per minute. Duct widths from 6 inches to 9 feet can be accommodated.
Follow engineering specifications to ensure that the air velocity in the duct falls within these parameters. The air
velocity can be verified by the use of a velocity meter to check the air velocity in the duct.
NOTE: Avoid mounting in places where condensation problems could arise, such as cold attics or outdoors.
[5.1] DETERMINE MOUNTING LOCATION ON THE DUCT
The UG-7-A6O must be installed with the duct air flow direction according to Figure 2.
The UG-7-A6O can be installed on any side of the duct.
UG-7-A6O Installation manual
HFE716 Version: 14
See Table 4.1 to determine the sampling tube required for different duct
The sampling tube should penetrate
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Date: 2014-03-24