5
GB-031C/f.347
INSTALLATION
1. General
The boiler must be installed by a professional plumber or heat-
ing engineer and must be connected to the public low voltage
network by a competent person. For systems that require a three
phase electrical supply we strongly recommend this is installed
by a 17th Edition certified Electrical Engineer.
The Electric Heating Company Ltd will not be held responsible
for faulty installations which are performed by un- qualified
tradespersons.
2. Pipe Connections
All Fusion Electric Boilers have a 22mm compression connection
at the boiler’s flow and return pipes. Please note that the boilers
are supplied with blank washers fitted for transit purposes. These
must be removed before connections to pipe-work can be made.
The flow (red) and return (blue) are clearly marked on the external
case and under no circumstances should these connections be
reversed. Hot connections are not recommended at the boiler for
future maintenance and boiler disconnection. Lockshield valves
are recommended.
3. Case Removal
Remove outer screws at the bottom of the boiler and pull the front
cover outwards taking care to remove internal earth connections.
Earth connections must be re-connected before the boiler case is
re-installed.
4. Isolation Valves
We recommend that lockshield isolation valves are fitted on the
flow and return pipework. Such valves must be ‘full way’ and
not ‘ball valves.’ The installation of ‘ball valves’ in the flow and
return pipework will reduce the recommended flow rate through
the boiler and promote premature boiler shutdown.
5. Auto air vents
An auto air vent is integral within the boiler however an addi-
tional auto air vent must be fitted at the cylinder coil if the boiler
is being used for central heating and domestic hot water.
6. Boiler Sizing
Calculate the ‘space heating’ requirements in accordance with BS
EN 12831 and BS EN 14336. If the boiler is to heat the domestic
hot water, an additional allowance of 3kW (10,239 Btu’s) should
be made to the ‘space heating’ calculation.
7. Insulation
Where practical, and if at all possible, we recommend that all
pipe-work be insulated, in particular the primary pipe-work
with-in a boiler cupboard. This is to reduce heat loss and reduce
high cupboard temperatures from exposed pipe-work. (BS 6700:
2006+A1: 2009).
8. System Design
The boiler has an integral automatic bypass valve fitted which
should be set to the relevant settings to allow the minimum flow
rates to pass through the boiler (8 l/min) when all radiator thermo-
stats and zone valves are closed.
Allowance should be made for a radiator to be installed within
the heating circuit and locked open. This will be located in the
room that has the room thermostat installed.
To comply with building regulations, Part L and Part J (in Scot-
land), room and cylinder stats must be fitted.
9. Water Connections
Provisions must be made for the replacement of water lost from
the heating system (sealed systems). Reference should be made
to BS EN 14336 for the method of filling and make up of water.
There must be no direct connection between the boilers central
heating system and the main water supply. When mains water is
required to fill the system directly, all local water bylaws must be
observed, and any connection made must be disconnected after
use.
10. Flushing
When installing a new Boiler to existing radiators & pipework
these items should be flushed before a new boiler is installed.
New boiler installations also require to be flushed before bolier
start up. This is to ensure that no debris is trapped in the flow sen-
sor as this may result in boiler failure.
11. System pressures
All boilers are tested to 4.0 bar. The normal working pressure of
the boiler should be set to approx 1.0 / 1.5 bar. All sealed sys-
tems should comply with the relevant building regulations and
standards, including BS EN 13831 – Specification for Expansion
Vessels.
Please Note:
In order to protect the Flow Sensor located within the boiler, it is
imperative that the pre-installed magnetic filter is removed and
cleaned at least annually. Failure to carry out this action will in-
crease contamination of the boiler by system residue.
