Technical Manual
FT420
– Iss 2.4
53
3.11 AS1668 Fan Control Module
The Brooks AS1668 Fan Control Module is totally independent design and hardwired to the CIE, it has
been designed to meet the requirements of AS1668:1998. The module is a dual fan controller for
controlling fire fans and can be incorporated in any conventional CIE.
The fire fan display and control boards provide an easy and simple to use manual override control via
a 3 position switch, 3 fan status indicators for Air Handling Units (AHU) and fire trip reset switch as
shown in Figure 30.
The AS1668 Fan Control module is used to display the fan status and control the fan operation in fire
mode conditions as well as manually override the fan operation. A number of jumper links are
available to configure and select the type of fan, normal or fail safe operation, options to select the
method of controlling the start or stop relays, fan fault indication, etc.
The AS1668 Fan Control module consists of two boards, display and termination board. The display
board (SUB953) is mounted on the front face plate behind a decal label that includes the fan status
indicators Stopped, Running and Fault in addition to 3 position switch On / Auto / OFF for fan
operation manual override. A Fire trip reset switch is also included to reset the smoke control system
independently of the fire mode condition.
The second board is the termination and control board (SUB952) and is mounted on the rear
equipment plate inside the CIE. The termination board is used to interface the general fire alarm relay
(GFA) or Duct Probe Alarm (DPA) to the MSSB equipment.
The Fan Control module supplies 24V DC to the external fan Start and/or Stop relays in the field either
in normal or fail safe mode depending on the jumper settings.
AS1668 Fan Control Kit
Part No.
Description
SUB952A
AS1668 Fan Control Termination Board (2 x Fans)
SUB953A
AS1668 Fan Control Display Board (2 x Fans)
LA978
1668 Decal Label (2 x Fans)
CA109M
16 Way Ribbon Cable Assembly 650mm. Longer cable can be used if required
SUB925A
SUB953A
Fan Label
Figure 30 AS1668 module
Note:
For more details, jumper settings and drawings, refer to Brooks technical bulletin TB008.
ON
OFF
AUTO
ON
OFF
AUTO
FAN RESET
FAN CONTROL