Grant Combi 21e User Manual

14
• BS715Metaluepipes,ttings,
terminals and accessories.
• BS799:5Oilstoragetanks.
• BS1181Clayueliningsandue
terminals.
• 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.
• 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 guarantee.
Before starting any work on the
boiler, or fuel supply please read the
health and safety information given
in Section 14.
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 guarantee.
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.
!
NOTE
!
WARNING
4 Boiler Installation Information
4.11 Pipework Materials
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.
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.
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.
!
NOTE

Grant Combi 21e Specifications

General

Brand	Grant
Model	Combi 21e
Category	Boiler
Language	English