Bedienungsanleitung Charnwood Island 3B (Seite 10 von 16) (Englisch)

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that the hearth must extend in front of the stove by at least 300mm

(12 inches) and to the sides of the stove by at least 150mm (6

inches). 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 inches)

each side and 300mm (12 inches) 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 460mm (18 inches), and

preferably 600mm (24 inches) 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 there must be an air gap

behind the appliance of at least 40mm, but be aware that this

distance will need to be greater in some cases to meet Building

Regulation requirements.

The central heating system must comply with BS:5449 part 1.

The installation of any electrical services during the installation of this

boiler and the associated heating system must be carried out by a

registered competent electrician and in accordance with the

requirements of the latest issue of BS 7671.

If the system is to be a combined heating and domestic hot water

system then a double feed indirect hot water storage cylinder to

BS:1556 part 1 should be used. In order to prevent the build up of

scale and corrosion, a suitable inhibitor should be used. The system

must be correctly vented as shown in Figs. 5 and 6. The height

differential between the header tank and the appliance must not

exceed 15.2 metres (50 feet).

If all four boiler tappings are used then, if possible, diagonal pairs

should be connected for domestic hot water and central heating.

Where a common return is used an injector tee must be

incorporated into the system, as shown in Fig. 7. This will ensure that

a good domestic hot water supply is maintained when the central

heating pump is operating.

The system must incorporate a gravity circuit which will normally

heat the domestic hot water and an unvalved radiator with an output

of at least 1 kW. When the appliance is not connected to a domestic

CENTRAL HEATING SYSTEM

Electrical connections

Central

Heating Return

Drain Cock at Lowest Point

Cold Water Tank

Circulating Pump

Central Heating Flow

Central Heating Return

Drain Cock at Lowest Point

Drain Cock

Gravity Return 28mm

Gravity Flow 28mm

Indirect Hot Water Cylinder

Cold Water Tank

Overflow

Feed and

Expansion

Tank

22mm Open Vents

Gravity

Radiator

Circulating Pump

Drain Cock

Gravity Return 28mm

Gravity Flow 28mm

Indirect Hot Water Cylinder

Domestic Hot

Water Draw Off

Overflow

Feed and Expansion Tank

22mm Open Vents

Gravity Radiator

Injector Tee

Central

Heating Flow

Minimum Return

Thermostat

Overflow

Domestic Hot Water

Draw Off

Gravity Return (28mm Pipe)

Central Heating

Return

Common

Return to Boiler

(28mm Pipe)

Fig. 7. Injector Tee.

Fig. 5. Typical Central Heating & Hot Water System

Using 4 Boiler Tappings

Fig. 6. Typical Central Heating & Hot Water System

Using 3 Tappings

Minimum Return Thermostat

INSTALLATION INSTRUCTIONS

charnwood

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