Bedienungsanleitung Worcester-Bosch Greenstyle Hanbury (Seite 17 von 36) (Englisch)

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176720819898 C 11/2017

CHIMNEY

In order for the stove to perform satisfactorily the chimney height

must be sufcient to ensure an adequate draught of approximately

15 Pa when hot so as to clear the products of combustion and

prevent smoke problems into the room.

NOTE: A chimney height of not less than 4.5 metres measured

vertically from the outlet of the stove to the top of the chimney

should be satisfactory. Alternatively the calculation procedure given

in EN 13384-1 may be used as the basis for deciding whether a

particular chimney design will provide sufcient draught. BS EN

15287-1:2007 gives additional details.

The outlet from the chimney should be above the roof of the building

in accordance with the provisions of Building Regulations Approved

Document J.

If installation is into an existing chimney then it must be sound and

have no cracks or other faults which might allow fumes into the

house. Older properties, especially, may have chimney faults or

the cross section may be too large i.e. more than 230 mm x 230

mm. Should remedial action be required, expert advice should be

sought. If it is found necessary to line the chimney then a ue liner

suitable for solid fuel must be used in accordance with Building

Regulations Approved Document J.

Any existing chimney must be clear of obstruction and have been

swept clean immediately before installation of the stove. If the stove

is tted in place of an open re then the chimney should be swept

one month after installation to clear any soot falls which may have

occurred due to the difference in combustion between the stove

and the open re.

If there is no existing chimney then any new system must be to

the designation described above and in accordance with Building

Regulations Approved Document J.

A single wall metal uepipe is suitable for connecting the stove to

the chimney but is not suitable for use as the complete chimney.

The chimney and connecting uepipe must have a minimum

diameter of 125mm and its dimension should be not less than the

size of the outlet socket of the stove.

Any bend in the chimney or connecting uepipe should not exceed

45°, 90° bends should not be used.

Combustible material should not be located where the heat

dissipating through the walls of replaces or ues could ignite it.

Therefore when installing the stove in the presence of combustible

materials due account must be taken of the guidance on the

separation of combustible material given in Building Regulations

Approved Document J and also in these stove instructions.

If it is found that there is excessive draught in the chimney then a

draught stabiliser should be tted. Fitting of a draught stabilizer will

affect the requirement for the permanent air supply into the room in

which the stove is tted in accordance with Approved Document J

(see also combustion air supply).

Adequate provision e.g. easily accessible soot door or doors must

be provided for sweeping the chimney and connecting uepipe

where it is not intended for the chimney to be swept through the

appliance.

This stove may be connected with a factory built or masonry

chimney with a minimum diameter of 125mm. If you are using

a factory built chimney, it must comply with BS EN 1856-1:2003

standard. It is very important that it is installed according to the

manufacturer’s specications.

If you are using a masonry chimney, it is important that it be built in

compliance with the specications contained in Document J.

The interior diameter of the chimney ue must be no smaller than

the diameter of the stove smoke exhaust pipe. A ue which is too

small may cause draught problems, while a large ue promotes

rapid cooling of the gas, and hence the build-up of creosote and the

risk of chimney res. Note that it is the chimney and not the stove

which creates the draught effect; the stove’s performance is directly

dependent on an adequate draught from the chimney.

Installation of an interior chimney is always preferable to an exterior

chimney. Indeed, the interior chimney will, by denition, be hotter

than an exterior chimney, being heated up by the ambient air in the

house. Therefore the gas which circulates will cool more slowly,

thus reducing the build-up of creosote and the risk of chimney

res. The draught caused by the tendency for hot air to rise will be

increased with an interior chimney.

Using a chimney cap at the extremity of the chimney requires

regular inspection in order to ensure that it is not obstructed thus

blocking the draught, and it should be cleaned when used regularly.

Exterior chimney should be double or triple wall.

CONNECTION TO CHIMNEY

Stoves may have a choice of either a rear or top ue gas

connector that allows connection to either a masonry chimney or a

prefabricated factory-made insulated metal chimney in accordance

with their instructions.

REGULAR CLEANING

It is important that the appliance, ue gas connector and chimney

are regularly cleaned and checked for any possible blockages prior

to re-lighting after a prolonged shut down.

INSTALLATION

Worcester-Bosch Greenstyle Hanbury Seite 17

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