12
Installation instructions
Before installing the heater read these instructions in full. If you are unsure please
contact our technical ser
vice department (03332407777).
Note: For further information please refer to the flow chart on page 19 which gives
guidance on choosing controls.
The installation must comply with all relevant Water Regulations/Byelaws and
Building Regulations.
The installer should check with the local water authority for confirmation of the
maximum water supply pressure.
a) SITING & FIXING WARNING:
The appliance should be left packed until it is ready to be installed. When
unpacking the 30 L model 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, but 300mm clearance
to the front of the water heater sould be kept for servicing and maintenance
A cold water supply pressure between 1 and 3.5 bar is required (if the mains pressure is
above 3.5 bar a pressure reducing valve must 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 (ensure
that wall is suitable to support the unit, allowing for the extra weight of water when it 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.
Ensure the unit is accessible and maintains sufficient clearances to allow for service and
maintenance.
Ensure the unit is installed in a place where freezing will not occur.
Ensure a suitable low level drain off cock is installed on the hot and cold plumbing system.
b) PLUMBING WARNING:
Note: If a valve i.e. a non return valve, water meter, pressure reducing valve or any
type of valve or fitting that acts as a non return valve is installed on the cold water
mains, this will prevent expansion. Therefore it will be necessary to install an
expansion vessel (see pages 12&13 figs 2 & 3).
Note: If in doubt always install a pressure reducing valve (limited to 3.5bar) and
expansion vessel.
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:
