Boiler Installation
Information
15
The system design pressure (cold)
should be between 0.5 bar and 1.0 bar.
The pressure is equivalent to the
maximum static head in bar + 0.3 (1 bar
= 10.2 metres of water), where the
static head is the vertical height from the
centre of the expansion vessel to the
highest point of the system.
Close the valves either side of the filling
loop and disconnect the loop.
4.7 Regulatory Compliance
Requirements
Installation of a Grant VORTEX Pro
Combi e boiler must be in accordance
with the following recommendations:-
• Building Regulations for England
and Wales, and the Building
Standards for Scotland issued by
the Department of the Environment
and any local Byelaws which you
must check with the local authority
for the area.
• Model and local Water Undertaking
Byelaws.
• Applicable Control of Pollution
Regulations.
• The following OFTEC requirements:
• OFS T100 Polythene oil storage
tanks for distillate fuels.
• OFS T200 Fuel oil storage tanks
and tank bunds for use with
distillate fuels, lubrication oils and
waste oils.
Further information may be obtained
from the OFTEC Technical Book 3
(Installation requirements for oil storage
tanks) and OFTEC Technical Book 4
(Installation requirements for oil fired
boilers).
The installation should also be in
accordance with the latest edition of the
following British Standard Codes of
Practice:
• BS 715 Metal flue pipes, fittings,
terminals and accessories.
• BS 799:5 Oil storage tanks.
• BS 4543:3 Factory made insulated
chimneys for oil fired appliances.
• BS 4876 Performance requirements
for oil burning appliances.
• BS 5410:1 Code of Practice for oil
firing appliances.
• BS 5449 Forced circulation hot
water systems.
4.8 Completion
Please ensure that the OFTEC CD/10
installation completion report (provided
with the boiler) is completed in full.
Leave the top copy with the User.
Retain the carbon copy.
Ensure that the User Information pack
(supplied with the boiler) is handed over
to the Householder.
4.9 Before you Commission
To avoid the danger of dirt and foreign
matter entering the boiler the complete
heating system should be thoroughly
flushed out - before the boiler is
connected and then again after the
system has been heated and is still hot.
This is especially important where the
boiler is used on an old system.
For optimum performance after
installation, this boiler and its associated
central heating system must be flushed
in accordance with the guidelines given
in BS 7593:1992 'Treatment of water in
domestic hot water central heating
systems'.
This must involve the use of a
proprietary cleaner, such as Betz
Dearborn's Sentinel X300 or X400, or
Fernox Restorer. Full instructions are
supplied with the products, but for more
details of Betz Dearborn’s products,
view the website www.sentinel-
solutions.net and for more details of
Fernox products view the website
www.fernox.com.
For Long term protection against
corrosion and scale, after flushing, it is
recommended that an inhibitor such as
Betz Dearborn's Sentinel X100 or
Fernox MB-1 is dosed in accordance
with the guidelines given in BS
7593:1992.
Failure to implement the guidelines will
invalidate the warranty.
4.10 Underfloor Heating
Systems
In underfloor systems it is essential that
the return temperature must be maintained
above 40°C to prevent internal
corrosion of the boiler water jacket.
4.11 Pipework Materials
In Grant boilers are compatible with
both copper and plastic pipe. Where
plastic pipe is used it must be of the
oxygen barrier type and be of the
correct class (to BS 7291:Part 1:2001)
for the application concerned.
4.12 Sealed Systems
If plastic pipe is used, the installer must
check with the plastic pipe
manufacturer that the pipe to be used
is suitable for the temperature and
pressures concerned.
Plastic pipe must be Class S to
BS 7291: Part 1:2001.
4.13 Underfloor Pipework
Plastic pipe may be used on Underfloor
systems where the plastic pipe is fitted
after the thermostatic mixing valve.
Copper tube must be used for at least
the first metre of flow and return primary
pipework between the boiler and the
underfloor mixing/blending valves.
• BS 7593 Code of Practice for
treatment of water in heating
systems.
• BS 7671 Requirements for electrical
installations, IEE Wiring Regulations.
Failure to install and commission
appliances correctly may invalidate
the boiler warranty.
!
NOTE
Before starting any work on the
boiler, or fuel supply please read the
health and safety information given in
Section 14.
!
WARNING
The first metre of pipework
connected to both the heating flow
and return connections of the boiler
must be made in copper on all types
of system - sealed or open-vented.
!
NOTE
The boiler incorporates a low-
pressure switch to shut off power to
the boiler if the system pressure
drops below 0.2 bar.
!
WARNING
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