UG-7-A6O Installation manual
page 9
HFE716 Version: 14
Date: 2014-03-24
Figure 16B
[7.3] METHOD 3 : AIR VELOCITY GREATER THAN 500 FPM:
First, verify the air speed is greater than 500 feet per minute by using the measurement method described in
method 1 above. With the air handler turned on, use a manometer to measure the differential pressure across the
inlet port and outlet ports of the sampling tube, this measurement shall be verified to be between 0.0028 to 1.49
inches of water. Please ensure that the end of the tube is completely sealed by use of a plug, or a duct tape in
order to obtain proper measurements.
[8] DETECTOR CONDITION INDICATION
Detector condition is indicated by the detector LED, and the corresponding LEDs on the power board. The
power board has four separate LEDs to indicate the status of the detector. Refer to
Table 8.1
for more details.
Table 8.1
Status
Description
Detector
LED: red
Power board LED
number
Status of relays
1
Green
2
Yellow
3
Yellow
4
Red
Terminals
open
Terminals
closed
Standby
Detector in normal
operation
9-10
11-12
14-15
7-8
12-13
15-16
Maintenance
Fixed LED 3: detector is
removed
Flashing LED 3:
detector is contaminated
7-8
9-10
11-12
14-15
12-13
15-16
Alarm
Detector detects smoke
12-13
15-16
7-8
9-10
11-12
14-15
Trouble
Power failure
Off Off Off Off
7-8
9-10
12-13
15-16
11-12
14-15
Linked alarm
from other
UG-7-A6O
AUX relays are in alarm
mode due to smoke
alarm from linked UG-7-
A6O
9-10
12-13
15-16
7-8
11-12
14-15
