User guide

497100, Issue 4 Page 3
1. Introduction
Alarm System
The alarm systems described in this book comprise a control unit (model
9853, 9752 or 9751), one or more keypads, and various detectors. The
control unit houses a main controller, power supply, stand-by battery and
communication device. It is normally fitted in a safe place out of sight (for
example, under the stairs).
The detectors are installed in various places, or zones, around the premises.
If something triggers a detector, the detector signals this to the control unit.
How the control unit reacts depends on whether the system is set or unset.
• When set, the control unit raises an alarm whenever a detector is
triggered. The alarm might be a bell or strobe on the outside of your
premises, or it might be a silent signal over the telephone line to an Alarm
Receiving Centre (ARC).
• When unset, the system does not raise an alarm if a detector is triggered.
Your installer can program the control unit so that your system is either:
• Single system. You can set the system to one of four levels: A, B, C or
D. Level A protects the whole of the premises covered by the detectors.
Levels B, C and D each protect part of the premises while the rest is in
use. You cannot set more than one level at the same time.
• Partitioned system. The premises protected by the system are divided
into four partitions: A, B, C and D. Each partition behaves as a separate
alarm system; it can have its own final exit and entry route zone, and it
can be set and unset independently of other partitions. One or more
partitions may share a common area. You can set one, two, three or four
partitions at the same time.
Whichever type of system you have, the control unit raises an alarm when a
detector in a set level or partition is triggered. Your installer allocates detector
zones to levels or partitions during installation. Refer to the table on page 32
to see if your system is single or partitioned, and how zones are allocated.
Your premises may be fitted with 24-hour zones and panic alarm zones. If
these zones are triggered, the system will raise an alarm even if no level or
partition is set. 24-hour zones are often used to protect emergency fire exits.