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User Manual Series F-BO-AFE70
2.2
Characteristic features of the Automatic Purging Unit F-BO-AFE70
In contrast to the structure of conventional Purging units, the Automatic Purging Unit F-BO-AFE70
only needs one (built-in) solenoid valve; furthermore, thanks to its thoughtful design, the Auto-
matic Purging Unit F-BO-AFE70 ensures completely unhindered air flow from the sampling pipe
through the Purging unit to the evaluation unit of the ASD. The unit is controlled by an integrated
control board which has been developed for this special task and which replaces the PLC that is
normally used.
Thanks to the use of high-quality materials and the high-precision processing, the Automatic Pur-
ging Unit F-BO-AFE70 is designed to ensure flawless operation for many years.
The trouble-free operation can be affected by various environmental influences, such as temperat-
ure, humidity and air that is polluted by gases and aerosols, which can cause increased need for
maintenance and reduce the life span due to wear and tear or contamination.
The following features distinguish the Automatic Purging Unit F-BO-AFE70:
6 Purging programs, each with short or long Purging cycle
they can be manually controlled by means of an external push-button
internal clock for up to 6 daily timed, preventive Purging processes
automatic start if fault message is received from aspirating smoke detector
remote-controlled start (e.g., based on external calendar of factory or office hours)
if there are several F-BO-AFE70's, a time delay can be used so as not to stress the com-
pressed-air system
master-slave mode with actuation of one or more „slaves"
monitoring of the supply voltage
they can be used in a wide pressure range, F-BO-AFE70-2 up to 0.7MPa (7bar) and
F-BO-AFE70-3 up to 1.0MPa (10bar)
they are prepared for connection to all usual fire detection control panels, either via conven-
tional lines or via loop modules.
I56-4252-010
D200-104-00
Chapter 2 • Manner of operation of a Purging unit
11
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