Installation Instructions
Before installing the heater read these instructions in full.
If you are unsure
please contact our technical depar
tment 0844 372 7766.
The installation must comply with all relevant Water and Building
Regulations.
The installer should check with the local water authority for confirmation of
the maximum water supply pressure.
a) Siting & fixing
WARNING: When unpacking MW models take care not to damage the
temperature and pressure relief valve on the top of the heater.
A drain has to be provided for any water discharged through the safety valves.
Access to the heater is not normally needed on a day-to-day basis.
A cold water supply pressure between 1 and 5.5 bar is required (if the mains
pressure is above 5.5 bar a pressure reducing valve will need to be installed).
Please note that turning down the stop-cock will reduce flow not pressure.
The outlet pressure from the reducing valve (if supplied) is 3.5 bar.
A 240 VAC; 3 kW single phase electrical supply is required.
Position the heater against the wall and mark the position of the hooked wall
bracket. Fasten the wall bracket to wall using suitable screws and wall plugs
(allowing for the extra weight of water when the unit is full). Hang the heater on
the bracket making sure that the heater is pulled well down on to the bracket, if
necessary by forcing the hooks into the foam insulation.
b) Plumbing
WARNING: The outlet from temperature and pressure relief
valve/pressure relief valve must not be for any other purpose.
Take great care not to allow any swarf into the pipe work or fittings, as this might
impair the operation of the safety valve(s).
The water connection may be carried out as per the following:
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