Acquisitions Bloomsbury SE Instalasi & Petunjuk Pengguna - Halaman 3

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Fig. 2 - Ideal Flue Connections

Fig. 2 - Chimney and Flue Performance

Available from

ACQUISITIONS

Effect of adjacent buildings, hills

or tall trees on the exit of flue gases

FLUE DRAUGHT

The chimney can be checked, before the stove is installed, with a smoke match. If the

chimney doesn't pull the smoke it may suggest the chimney needs attention (see the Flue

Diagnosis Table, below).

MEASUREMENTS

The flue draught test hole must be drilled in the flue pipe as close to the stove as possible

and before any flue draught stabiliser.

This test is only a guide as an apparently poor flue may improve once the

stove is installed, lit and the flue is warmed. If, once the stove is installed,

there is any doubt that the chimney is providing an adequate draught, a flue

draught reading can be taken with the stove lit. Two flue draught readings

should be taken, one with the stove at minimum rate and one at maximum

rate.

MINIMUM

The stove should be lit and allowed to warm the flue thoroughly. The air controls can then

be set so that the stove burns on a low setting. Allow the burning rate to become steady.

The flue draught reading should now be taken with the primary air intake closed and the

airwash control fully open.

MAXIMUM

The primary air intake can now be opened to allow the stove to burn at maximum rate. Give

the stove some time for the burning rate to become steady and then close the primary air

intake, make sure the airwash control is fully open and take a flue draught reading immediately.

Ideally, the flue draught reading should range between 1mm wg (10 Pa) and 2.5mm wg (25 Pa).

Any readings significantly outside this range may indicate the need for remedial action.

difficult to light and smoke coming into the room.

Low flue draught symptoms:

CAUSE

REMEDY

Line the chimney

Cold chimney

Chimney too short

Extend the chimney

Relocate/extend chimney terminal. Fit an anti down draught cowl

Down draught

Chimney diameter too large

Line the chimney

Chimney obstruction

Clear/sweep the chimney

Check for competing draughts (other chimneys, extractor hoods/fans).

Restricted air supply

Fit an air vent if the room is sealed

High flue draught symptoms:

fire difficult to control, fuel will not last, stove too hot, stove damage, chimney fire.

CAUSE

REMEDY

Fit stabiliser cowl.

External wind conditions combined

with chimney terminal

Fit flue draught stabiliser.