20
Allowing for the acceptable pressure loss of 1
mbar across the installation pipework, it can be
assumed that a minimum permitted operating
pressure of 18 mbar (nat gas) will be delivered
to the inlet of the appliance. (reference BS
6400-1 Clause 6.2 Pressure Absorption).
The external gas cock could further reduce the
operating pressure when measured at its
d at its test
point. The pressure drop is relative to the heat
input to the boiler (kW), refer to graph below.
4.7 FLUE SYSTEM
The terminal should be located where dispersal
of combustion products is not impeded and with
due regard for the damage or discolouration
that might occur to building products in the
vicinity (section 4.10).
The terminal must not be located in a place
ocated in a place
where it is likely to cause a nuisance in cold
where it is likely to cause a nuisance in cold
and/or humid weather as water vapour may
and/or humid weather as water vapour may
condense on leaving the flue terminal.
condense on leaving the flue terminal.
The effect of such pluming must be
The effect of such pluming must be
considered.
considered.
The terminal must not be closer than 25 mm
The terminal must not be closer than 25 mm
(1 inch) to any combustible material for
(1 inch) to any combustible material for
protection of combustibles, refer to BS 5440.1.
Where a flue terminal is installed less than 1000
mm from a plastic, or painted gutter; or 500 mm
from painted eaves, an aluminium shield 1000
mm long, should be fitted to the underside of
the gutter or painted surface.
Pluming will occur at the terminal so, where
possible, terminal positions which could cause
a nuisance should be avoided.
The flue must be installed in accordance with
the recommendations of BS 5440: Part 1.
IMPORTANT NOTES:
For greater fl ue lengths see alternative fl ue
instructions. Flue must be positioned in a
place not likely to cause a nuisance from
pluming.
IMPORTANT NOTICE:
If the fl ue terminates
below a balcony, above the ground, above a
fl at roof to which people have access, then
a suitable
terminal guard
must be fi tted if
less than 2 metres high. The part number is
less than 2 metres high. The part number is
PRO110100.
PRO110100.
Fit only recommended
Fit only recommended
FLUE TERMINAL
FLUE TERMINAL
GUARD
GUARD
b
by securing concentrically around
terminal with screws.
Available on request from:
Ravenheat Manufacturing ltd
Chartists Way, Morley, Leeds,
West Yorkshire
ENGLAND LS27 9ET - UK
Tel. 0113 252 7007
IMPORTANT:
The following notes are intended for general
guidance.
The boiler MUST be installed so that the
terminal is exposed to external air.
It is important that the position of the terminal
allows the free passage of air across it at all
times.
times.
Minimum acceptable spacing from the terminal to
obstructions and ventilation openings are
specifi ed in section 4.10.
Note positions:
Due to the terminal design,
installation is possible with clearances less than
those specifi ed in BS 5440, Part 1
NOTE:
The flue must be terminated in a place not
likely to cause a nuisance.
A concentric vertical flue kit is available for
longer flueing applications (see table 5 page
26).
For further details see vertical flue installation
instructions.
4.8 AIR
SUPPLY
The following notes are intended for general
guidance.
The room sealed fan flued boiler does not
require a permanent air vent for combustion air
supply.
Where installed in a cupboard or compartment
ventilation is not required.
4.9
WATER CIRCULATION (Central heating)
Detailed recommendations are given in BS6798
2009/5449:1990 - BSEN12828 - BSEN12831
- BSEN14336 (for smallbore and microbore
central heating systems). The following notes
are given for general guidance.
Summary of Contents for CS 80 T
Page 2: ...2 ...
Page 21: ...21 4 10 FLUE TERMINAL POSITION ...
Page 54: ...10 ELECTRICAL SYSTEM DIAGRAM 54 Fig 56 ...
Page 55: ...55 11 SPARE PARTS Fig 57 ...
Page 61: ...61 ...
Page 62: ...62 ...
Page 64: ...64 FLOWCHART FOR CO LEVEL AND COMBUSTION RATIO CHECK ON COMMISSIONING A CONDENSING BOILER ...
Page 65: ...65 12 1 ANALYSER CHECK LIST ...
