Automist
®
Fixed Wall Head Handbook v1.2.3
Plumis Ltd Copyright © 2017. All Rights Reserved.
Page 24 of 41
S MA RT SC AN
®
The pump should be installed in one of the following locations:
•
In a room or cupboard with volume of at least 0.124 m3, that is separated by a fire resisting
partition from the mist-protected room(s) that it serves, or
•
In a cupboard with volume of at least 0.124 m3, within a room that the pump serves, with the top
of the pump less than 1m above finished floor level.
IMPORTANT:
Leave a 100 mm gap without obstruction at both the front and back of the pump. Do not
cover the pump with any products or materials.
IMPORTANT:
If new pipe has been fitted remember to flush out any contaminants before connecting to
Automist, to avoid clogging the nozzles.
Connect the high pressure hose from the assembled head to the outlet on the pump. Plumis supplies
suitable high-
pressure hoses. If using another brand of hose, follow Plumis’s guidance
note, available on
the Plumis Partner Site. All high pressure hoses should have a minimum working pressure of 150 bar,
minimum internal diameter of 6.3mm and a minimum burst pressure of 600 bar. For hoses longer than 4m,
hoses with a robust rubberised exterior and double wire braiding are recommended such as DIN EN 853
2SN / SAE 100R2AT or DIN EN 857 2SN, rated to 400 bar working pressure and a minimum internal
diameter of 6.3mm. Hoses crimped on-site must be pressure tested to at least 150 bar before the
commissioning procedure to check for correct assembly. High pressure hoses left exposed in the protected
volume, particularly at height, could be compromised in a fire. Hoses should therefore be encased in the
wall whenever possible. Where possible, hoses should be run low in the room, all other factors being equal,
and in any case the locations of hoses must be chosen so that they will not be exposed to temperatures
above 100°C. For hoses longer than 10m and up to 20m, please refer to the high pressure hose technical
specification document on the Partner Site. Longer hoses require an increased internal diameter of 5/16" to
account for the higher pressure drop.
IMPORTANT: Plumis’s
most recent guidance document on hose
specification is more detailed and overrides this document if there is any ambiguity.
A brass quick connector and locking pin is supplied to connect the high pressure side of the pump to the
spray head. A small o-ring is included. The locking pin retains the quick connector in the pump outlet but
can be easily removed, for example in order to drain water from the high pressure hose. Connect the test
point adaptor between the high pressure hose and the quick connector. The test point adaptor is required
as part of the commissioning procedure (see page 29).
KEEP
CLEAR
CLEAR
KEEP
CLEAR
CLEAR
