Xtralis ICAM IAS-2, Product Manual

Page: 26 / 38

IAS-2 Product Guide ICAM by Xtralis
20 www.xtralis.com
6.3 Set-up Notes
The Fan Speed, Flow Limits and Flow Sensitivity need to be set for each installation prior to Flow Calibration
and testing. It is not possible to provide the settings for all possible installations but the following guidelines
should assist in the commissioning of the unit.
6.3.1 Fan Speed
The Fan Speed should be set as high as possible to achieve the fastest transport time from the sampling point
to the detectors, this is especially important for longer pipe lengths and for installations that must conform to
the requirements of AS 1603.8 under the ActivFire scheme (see Section 9:
AS 1603.8 Listed Detectors ).
There is, however, a balance to be achieved between performance and the power requirements for the system
and reference should be made to the current consumption figures in the specifications prior to setting this
value. Fan speeds 3 and below should not be used for standard configurations.
6.3.2 Flow Delays
By default, an increase or decrease in flow beyond the FLOW HIGH and FLOW LO limits will result in a
FLOW FAULT after a delay of approximately 15 seconds. Once the flow is returned to a normal level, the fault
condition will be cleared within 1 to 2 seconds.
In environments where the sampled airflow may be affected by sudden temperature or pressure changes, or if
there is a risk of physical interference of the sampling point (e.g. prison cell applications) then it may be
necessary to increase the delay between when flow limit has been exceeded and instigating a FLOW FAULT
condition.
Table 6-2: Flow Delay Settings for the IAS-2 system
Bargraph LED Flow into Fault Delay
(Seconds)
Flow out of Fault Delay
(Seconds)
0 15 2
1 30 18
2 60 18
3 90 18
4 120 18
5 150 18
6 180 18
7 210 18
8 240 18
9 270 18
Note: Timings are approximate.
Note: The default flow delay setting is 1.