Automist Smartscan Hydra
®
DIOM Manual - version 3.01.0
Plumis Ltd Copyright © 2020. All Rights Reserved.
Page 50 of 116
S MA RT SC AN
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Pump with an output relay (AP10)
Automist’s (AP10) pump can output an alarm signal, and its functionality should be integrated into the
protected premises in a way which is compatible with the fire strategy for the protected premises. In all
cases, the relay should generate a fire alarm signal that initiates the appropriate emergency procedures.
Automist may be interfaced with the fire detection and fire alarm system, so that a fire alarm signal is given
by the building’s fire alarm system when the Automist pump operates. Automist has a high level of
reliability in fire situations, coupled with very few unwanted actuations, an alarm generated by the alarm
device needs to be treated as a confirmed fire signal. Pump model AP10 has an output relay allowing a volt
free to be sent to any panel/receiver device when the pump is activated. Alarm system designers need to
take account of the fact that the pump flow alarm might have more than one function, e.g. to initiate
evacuation, to alert management and/or alert the fire and rescue service.
Integration with other alarm systems
IMPORTANT
Where the protected premises are to be fitted with automatic fire detection and alarm
systems, they should be in accordance with BS 5839 and be to at least the minimum grade and category
recommended in BS 5839. It is important to ensure that, prior to the installation of a fire detection and fire
alarm system, one organisation has accepted responsibility for compliance with the relevant section of BS
5839. The Standard emphasises this point because it is possible for more than one party to be involved in
the process of design through to installation, alarm and Automist commissioning.
1)
Domestic
Take for example when Building Control stipulate a Grade D LD1 standard fire alarm system. Smoke
detectors will be sited in hallways and landings at all floor levels, and they must also be sited in all habitable
rooms and areas where a fire might start that communicate with the stair enclosure.
Automist can use the Grade D LD1 fire alarm system as an initiation device if suitable early warning
detection is present in all the protected areas and enough zones can be created.
IMPORTANT!
Maximum of 3 heads per zone. Small zones are preferrable because it is easier for the system
to find the fire if it is searching through less area.
A volt-fire relay is required to initiate the scanning of Automist for each zone. The selected alarms must
meet the requirements of either BS 5839-1:2017 or BS 5839-6:2019. There are six grades of system ranging
from Grade A to F, whereby a higher grade generally represents a greater risk of fire in the premises, so a
higher level of fire safety system is needed to be installed. However, the nature of the premises and the
characteristics of the occupant are also important factors. Most of the standard housing in the UK falls
within the D-F category - whereby mains or battery-powered alarms are installed. This progresses in
complexity until grade A is reached, in which case a full fire detection system with control and indicating
equipment is installed.
A panel has programmable zonal outputs which would enable using multisensor detection and the relay as
an initiating scanning device (24V DC impedance 2 wire). Many panels come in 2-4-6-8 zone options, all
zones operate as either conventionally or as a twin wire setup. To simulate a detector it is necessary to use
a pair of resistors as per the diagram below to replicate the high impedance state of a stand-by detector
and the low impedance state of an alarming detector. The relay output (with resistors) must be connected
to a Hydra head in the zone it is protecting.