UG-7-A6O Installation manual
page 5
HFE716 Version: 14
Date: 2014-03-24
Figure 6
Figure 7
Figure 8
[5.4] INSTALLATION OF SAMPLING TUBE LONGER THAN 2 FT.
Strong vibrations can arise inside a duct due to the air currents. When the
diameter of the duct is larger than 2 ft.
the sampling tube should penetrate the whole duct. Drill a 2 inch hole in the opposite side of the duct. Mount the
rubber gasket HFU204* in the hole. Put on the long plastic end plug HFU640* on the sampling tube. The
sampling tube should not protrude more than 1 inch through the duct wall in order to avoid air leakage.
Figure
12.
* Delivered together with sampling tubes of 5 and 9 ft.
Figure 12
[6] FIELD WIRING INSTALLATION GUIDELINES
All wiring must be installed in compliance with the National Electrical Code and the local codes having
jurisdiction. Appropriate wire gauges should be used. Color-Code the conductors used to connect smoke
detectors to control panels and accessory devices to avoid wiring problems. Improper connections can prevent a
system from operating and responding properly in the event of a fire condition. A minimum 18 gauge wire must
be used for signal wiring (when interconnecting detectors or between detectors and auxiliary devices)
[6.1] CONDUIT ENTRIES AND WIRING
The UG-7-A6O is factory prepared with one conduit opening. In case more than one opening is needed, carefully
remove the round plastic wall in the selected entry and insert a conduit connector. If the factory prepared
opening is not used, it must be properly sealed.
Figure 14a.
Remove the four screws and lift of the cover according to
Figure 14b
in order to be able to make the wiring.
Place the cover back on the housing, and tighten the four screws – for proper mounting, please use torque: 1.8-
1.9 Nm.
[6.2] DETECTOR LINKING
UG-7-A6O has linking function that allows interconnection between maximum 100 units. All linked detectors
operate independently from each other. The linking function is to be seen as an extra prevention feature that
could close dampers or stop fans further away in the ventilation system, before the smoke has reached the places
were the linked detectors are installed. Maximum 200 yards cable length between each detector. The detector
link circuit must be a loop. This means that the last linked detector must be connected with the first detector.
Linking function: When one of the linked UG-7-A6O goes into smoke alarm, all other detectors AUX relays are
activated. The smoke alarm can only be reset on the UG-7-A6O that initiated the smoke alarm. This also resets
the AUX relays on all linked detectors in the loop. To test the linking function: press and hold the Test/Reset
button (or short circuit between terminals 6 and 1) for more than 10 seconds on one of the linked detectors.
For wiring information, see
Figure 16.
NOTE:
Disconnect the power when installing the detector linking function.
Consult
Figure 16
and
Table 8.1
for more information
1
2
3
HFU204
HFU640
>2 ft.
