“Nebula” high pressure water mist system
installation requirements
 1ST FIX
(Installing high pressure hose(s) to nozzle location(s) ceiling mounted.
Mist Fire Suppression Ltd (MFS). will need to install 22mm high
pressure hose(s) from the agreed pump position to the agreed ceiling
nozzle locations – NB. This will have been agreed on site following a
survey undertaken by MFS engineers and the client’s representative
(this will normally be the building contractor. However, please ensure
whom so ever on site is the main point of contact and who makes
decisions on the clients behalf is in attendance). The high pressure
hose(s) must be installed within the building fabric, albeit this is a
ceiling mounted system there may be a need to run high pressure
hoses from the pump position. This may require the hoses being run in
22mm high pressure hose
floors, and or walls to the first nozzle position. The client or the clients
representative must ensure complete freedom of access through the agreed routes to enable to run the high
pressure hose(s) without any obstructions, i.e. all routes agreed must be open and accessible, (MFS do not
undertake any building works).
 2nd Fix
Electrical Requirements – per pump
Before the second fix installation can commence all water and all electrical supplies to every pump location
must be permanent and live. Please see abortive call charges information at the foot of these instructions.
All details shown below relate to a single pump installation. In the case of multi pump installations all the
requirements detailed below will need to be repeated in each pump position.
Elite Fire Safety require a NON RCD protected supply run in FP200 (2.5mm) fire retardant grade cable to a
20amp lockable (rotary type) switch at the agreed pump position. The supply is to be wired from the client’s
consumer unit (Fuse Board) – 17th edition compliant. The Non RCD circuit to be protected at the fuse board
with a C20 breaker (per pump).
20 amp lockable switch
(Rotary Type)
C20 breaker
Mist Fire Suppression Ltd
Manufacturers and installers of Nebula HPWM systems for Greater London and the South West of England
London office: 0207 167 6560 Bude office: 01288 355787
Email: [email protected]
Web: www.mistfs.co.uk
 2nd Fix – continued
Plumbing requirements – per pump
22mm copper incoming cold water supply to
the pump only.
Minimum incoming water pressure 1 Bar
¾” + handle water
isolator valve
IMPORTANT NOTE
The ¾” BSP Valve must be NO FURTHER than
300mm from the agreed pump position to allow
connection to the rear of the pump unit with a
flexible hose.
Flexible hose connection
between pump and incoming
water supply, NO FURTHER than
300mm apart
Mist Fire Suppression Ltd
Manufacturers and installers of Nebula HPWM systems for Greater London and the South West of England
London office: 0207 167 6560 Bude office: 01288 355787
Email: [email protected]
Web: www.mistfs.co.uk
Nebula supply pump dimensions and weight




Height – 400mm
Length – 600mm
Depth – 300mm
Weight – 45 kilograms
Nebula supply pump typically
positioned adjacent to incoming water
supply i.e. under-stair cupboard or
similar.
Nebula high pressure water mist nozzle, ceiling mounted.
Activated by 57° frangible break glass. Maximum operating
pressure 140 Bar. ‘K’ factor (flow) 3 – 12 litres
Finish options
 Stainless steel
 Chromed brass
16 m² coverage per
nozzle
4 metre diameter spray
Installation options
Mist Fire Suppression Ltd
Manufacturers and installers of Nebula HPWM systems for Greater London and the South West of England
London office: 0207 167 6560 Bude office: 01288 355787
Email: [email protected]
Web: www.mistfs.co.uk
Option 1
1st fix – Running high pressure Hose(s)

Free & unhindered access for the high pressure hose run from the agreed pump position to the
agreed spray head position. We require a clear unhindered access to the pump position. Any chasing
etc. will need to have been completed prior to us undertaking the first fix.
2nd fix – Installation of pump(s), spray head(s) and commissioning of the completed system

This will be MFS last visit – All testing/commissioning will be completed at the 2nd fix stage
Before the second fix installation can commence all water and all electrical supplies to each and every
pump location must be permanent and live. (As per the previous pages in this document). All pumps,
ceiling mounted nozzle locations must be ready and accessible for the commissioning of the system.
Option 2
Full install – All works completed in a single site visit

All the 1st & 2nd fix requirements will be carried out on a single visit. NB this option will only be carried
out following full up-front payment of the project
All the information contained within this contractors pack is designed to ensure the seamless installation of the
Nebula high pressure water mist fire suppression system and must be strictly adhered. This document must be
read and understood by the client or client’s representative thus avoiding the likelihood of any abortive calls or
possible additional charges for revisits. Abortive call charges will be made if;
There is no permanent water supply
There is no permanent electrical supply
Pump positions are not cleared and available for pump installation
Agreed pump enclosures (if required) have not been installed
Pump enclosures (if required) are not the correct size
Unhindered access for high pressure hose installation is not facilitated.
Our current abortive call charge is £150.00 + vat per day and will be levied without exception if our works
are affected, delayed or aborted. Please refer to our Terms and Conditions sent with this quotation.
To alleviate any potential site issues, a site survey will always be undertaken and all pump positions, spray
head positions and hose runs agreed with the on-site MFS engineer and the client or client’s representative.
Once agreed a signature will be required from the client or client’s representative on our site survey sheet
agreeing that all parties understand the pre installation requirements of the Nebula system.
T: 0207 167 6560
Mist Fire Suppression Ltd. 27 & 27A, Darnley Road. Gravesend. Kent. DA11 0RZ
[email protected]
Mist Fire Suppression Ltd
Manufacturers and installers of Nebula HPWM systems for Greater London and the South West of England
London office: 0207 167 6560 Bude office: 01288 355787
Email: [email protected]
Web: www.mistfs.co.uk