Automist
®
Fixed Wall Head Handbook v1.2.3
Plumis Ltd Copyright © 2017. All Rights Reserved.
Page 15 of 41
S MA RT SC AN
®
Detection System
Automist
’s
reliability is dependent on the detection system. Automist is designed to be triggered by a
correctly installed, positioned, and CE marked, heat alarm (BS 5446-2 compliant) or by a heat detector
(EN54-5 compliant) connected to a fire panel
3
. Automist is activated by feeding its three-wire alarm input
cable from a three-terminal relay that is triggered directly or indirectly by the relevant alarm or detector.
•
Automist is designed to be connected to all three terminals of the relay: Common, Normally Open
and Normally Closed. Any wired or wireless fixed-point heat alarm family that offers such a
connection style may be used. A trigger point of 57 degrees (Class 1) is recommended.
•
The pump monitors the C/NO/NC connections continuously. In the standby state, the relay must
link the Common and Normally Closed wires together. In a fire state, the relay switches, instead
linking Common to Normally Open.
•
Relays with only Common and Normally Open terminals may also be used but in such cases the
Automist pump must be customised by Plumis before shipping.
•
DO NOT
trigger Automist from a smoke alarm as this will lead to unwanted activations.
•
DO NOT
connect the Automist pump’s alarm input to any device other than a volt free relay. In
particular, connecting the three coloured cables to the alarm interconnect or to any power supply
whatsoever is likely to damage the Automist pump beyond repair.
•
In its default setting, Automist is programmed to run continuously for 30 minutes on activation.
This is designed to prevent interruption of mist even if a heat alarm is damaged by extended
exposure to fire.
•
Where multiple Automist units are used, each must take its input from its own dedicated relay
module e.g. the relay base of a heat alarm.
•
Where multiple Automist units are used in a single space, the alarm system should activate all relay
units in that space simultaneously. This can be achieved by interconnecting wired heat alarms,
using one alarm relay to drive several additional relays, or associating multiple wireless relay
modules with one or more wireless heat alarms.
3 Other specific alarms/detector models are also acceptable where Plumis has tested the products and
documented their use on the Plumis Partner Site library page, provided that associated Plumis and manufacturer
guidance is followed.
1400
–
1500 mm
Single-gang mounting box
