Manual Charnwood Haven (page 12 of 20) (English)

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INSTALLATION INSTRUCTIONS

CO ALARMS

Building regulations require that whenever a new or replacement

fixed solid fuel or wood/biomass appliance is installed in a dwelling

a carbon monoxide alarm must be fitted in the same room as

the appliance. Further guidance on the installation of the carbon

monoxide alarm is available in BS EN 50292:2002 and from the

alarm manufacturer’s instructions. Provision of an alarm must not

be considered a substitute for either installing the appliance correctly

or ensuring regular servicing and maintenance of the appliance and

chimney system.

CHIMNEY

In order for the appliance to perform satisfactorily the chimney

must give sufficient draw when warm (minimum of 12pa/0.05”

wg). The height of the chimney must comply with local

building regulation requirements. The internal dimensions

of the chimney MUST NOT BE LESS THAN 125 mm (5”)

If an existing chimney is to be used it must be swept and checked,

it must be in good condition, free from cracks and blockages, and

should not have an excessive cross sectional area. If it was previously

used by an open fire 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 fire.

If you find that the chimney is in poor condition then expert advice

should be sought regarding the necessity of having the chimney lined.

If it is found necessary to line the chimney then a lining suitable for

Solid Fuel must be used.

If there is no existing chimney then a prefabricated block chimney

or a twin walled insulated stainless steel flue to BSEN 15287-1:2007

can be used either internally or externally. These chimneys must be

fitted in accordance with the manufacturers instructions and Building

Regulations.

Single wall flue pipe is suitable for connecting the stove to the chimney

but is not suitable for using for the complete chimney. If it is found

that there is excessive draw in the chimney then a draught stabiliser

should be fitted.

It is important that there is sufficient draw in the chimney and that the

chimney does not suffer from down-draught. When the chimney is

warm the draw should be not less than 1.25mm (0.05”) water gauge

(12 Pa). If in doubt about the chimney seek expert advice. The flue

draft may be measured by removing the small stop at the left hand

end of the fire door handle, and inserting the probe in the hole.

HEARTH AND FIRE SURROUND

The stove must stand on a fireproof hearth and must not be situated

closer than the minimum distance from combustible materials (see

specification table) to the sides or rear above hearth level unless

adequately fireproofed in accordance with local building regulations.

The hearth must be of fireproof material and at least 12mm (1/2in.)

thick. The positioning of the stove and the size of the hearth are

governed by building regulations for Class 1 appliances. These

building regulations state that the hearth must extend in front of the

stove by at least 225mm (9 in.) and to the sides of the stove by at

least 150mm (6 in.). When the fire door is open, it extends beyond

the flat front of the stove by 255mm.

If in doubt as to the positioning of the stove, expert advice should be

sought either from the supplier or the local building inspector. The

fireplace must allow good circulation of air around the appliance to

ensure that maximum heat is transferred to the room and also to

prevent the fireplace from overheating. A gap of 150mm (6”) each

side and 300mm (12”) above the appliance should give sufficient air

circulation. If a wooden mantelpiece or beam is used in the fireplace it

should be a minimum of 750mm (29.5”) from the appliance. In some

situations it may be necessary to shield the beam or mantelpiece to

protect it.

In order for the fire to operate correctly and to allow for access,

there must be an air gap behind the appliance of at least 50mm,

but be aware that this distance will need to be greater in some

cases to meet Building Regulation and safe distance to combustibles

requirements.

The appliance should be installed on a floor with adequate load-

bearing capacity. If an existing construction does not meet this

requirement then please take suitable measures to achieve this. (e.g.

load distributing plate.)

CONNECTIONS TO FLUES

The Haven must be connected to the flue using flue pipe of 125mm

(5”) diameter.

There are several ways of connecting the stove to the flue. These are

illustrated in Figs. 6 to 8.

The chimney cannot be swept through the appliance and a clean

out door is required. Horizontal lengths of flue must be kept to a

minimum and should not be more in length than the flue diameter.

All flue connections must be well sealed.

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Charnwood Haven Manual

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