Smoke Alarm User Manual

Installation, Operation and Maintenance Manual
Issue 1 Page 2-11
February 2001
2.3.3 Fan Module
The fan module contains a highly efficient radial fan that has been specifically designed for use within the
Detector. The fan draws air from the sampling pipe network through the detector head and then exhausts
the air through a port on the side of the unit or by an alternative optional rear exhaust port. In addition, an
adapter port returns the sampled air to the protected area. A regulated voltage is supplied to the fan
module from the termination board.
2.4 Display Module
The Display Module is an optional item that can be either mounted within the Detector or alternatively, it is
possible to mount remotely. Remote mount can be achieved by use of a back box or a rack mount
option. Maximum distance of up to 1 km from the Detector to the remote Display Module is allowed. In
either application, RS-485 communication and 28 V DC is supplied via terminals located upon the
termination board. Recommended cable type being Mineral Insulated Copper Cable (MICC).
Various facilities are provided by the Display Module that include the following:
Operator Visual Interface
Internal Audible Sounder alarm
Status LED
Control Keys (4 cursor and 1 enter)
The cursor control keys allow an operator to navigate through the displayed menu and password screens
by operating the Up, Down, Left or Right keys and the Enter key.
Real time system data is displayed which includes the current smoke level and airflow, all alarm
conditions, all trouble conditions and the current system status.
An internal sounder provides an audible indication that an alarm or trouble condition exists on the system.
If a trouble condition exists the sounder alarm operates intermittently. Upon the activation of an event the
sounder will provide an audible indication. The audible indication will continue until the operator silences
the sounder using the control keys.
The conditions that activate the sounder are:
Any Alarm Condition
Any Pre-Alarm Condition
Any Trouble Condition
A multi coloured LED that is controlled via the Display Module provides a visual indication of the current
system status.
Continuous Green Normal
Flashing Green Auto Setup
Continuous Yellow Fault/Isolate
Flashing Red Pre-Alarm
Continuous Red Alarm
Control keys are used to navigate through the menu selections.