3
INSTALLATION
INSTRUCTIONS
SITE PREPARATION
Site requirements
When an Installation is contemplated
the application for supply should be made in good time to the
local Electricity Supply Company stating the boiler make and model as shown on the boiler specification
label to ensure that sufficient power is available from the mains.
All installations must comply with the relevant building and electricity regulations and water bye-laws.
These boilers being un-vented, must be installed by a “competent person” as defined by section G3 of the
current building regulations. The local authority must also be informed of the installation.
To ensure correct installation and economic trouble free operation, ensure that only an approved installer is
used who is in possession of the relevant pressure water certificate. Contact one of the Heatwell technical
help lines at :-
Nottingham 0115 968 1273 or Glasgow 0141 944 0440
This electric combination boiler is designed to make use of all the wet electric tariffs currently available.
This in most cases will consist of interruptions or restriction of the boiler power supply which the boiler
has been designed to cope with. In return the cost of the electricity supply will be less expensive than the
domestic rate. Application must be made for an additional supply before any installation work is started.
As the boiler is un-vented, the mains water supply pressure and flow rate should be checked to ensure a
minimum supply pressure of 1.5Bar is available. If the water supply pressure can not be relied on, then a
vented system can be considered. Heatwell should be contacted for assistance with the planning of the
vented installation so that the maker's guarantee remains intact.
If the boiler is used in an area where the temporary hardness exceeds 200ppm, to comply with warranty, an
approved scale inhibitor must be fitted to the cold water supply of the boiler.
Location
The electric combination boiler should be located in a space where the surface is flat, level and capable of
supporting the weight of the boiler when full of water. (see page 12 for boiler weights)
The boiler should not be subjected to extremes in temperature (outbuildings) unless frost protection is
provided, or, (internal cupboards) No special ventilation need be provided, but the boiler should not be
covered with clothes or anything that would prevent the escape of heat from the front panel, or the
operation of safety valves.
Clearances are not critical except that the boiler should be positioned to allow access to the heating
elements and control box on the front of the boiler.
In addition, sufficient clearance should be allowed to enable access to the expansion vessels, valves and
circulating pump as may be required by an engineer servicing or replacing these items. The central heating
pressure Gauge and Tundish should be positioned so that they are easily visible and accessible.
Care should be taken to allow space for insulation of all pipe-work, including cold pipes which will
conduct heat within the boiler cupboard; this pipe insulation should be 25mm thick to prevent heat-loss
from the storage boiler. This is important to reduce running cost.
Plumbing Layout
