version 4.7.2 – July 10th, 2022 Firmware version V2.1.7 and higher
EXXFIRE Installation and Service Manual 76
Flow monitoring sensitivity
The air flow sensor detects changes in air flow, which in turn reflects the status of the sampling
pipe, and filter. If the filter or sample pipe is blocked, then the air flow will drop. If the filter is
damaged, or the pipe is broken, then the air flow will increase.
In some applications, air flow may be heavily influenced by air conditioning or cooling fans. In this
case, it may be attractive to reduce the sensitivity of the flow sensor in order to reduce the
frequency of fault events in the system, using DIP switch 7.
NB See Note 2 in section 5
Table 12 Flow monitoring sensitivity
• Note that changing flow sensitivity from the factory pre-set may compromise local
regulations in some areas.
Manual Activation Button and Door Switch
A Manual Activation Button (MAB) can be connected to a system to generate an Alarm and
subsequent gas release when the operator activates the MAB. The presence of a MAB must be
configured, using DIP switch 9.
Table 13 Manual Activation Button
A Door Switch (DS), or multiple Door Switches in series, can be connected to a system to prevent a
gas release from happening in case one or more of the doors to which the switches are connected
are open. The presence of a Door Switch must be configured using DIP switch 10.
Door Switch configuration
Door Switch not connected
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