Miele T1520 operating instructions To calculate the effective duct length Tabel

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Installation - venting

The shorter the exhaust ductwork, the more efficient the dryer will be. Ex- pelled air is slowed down in the ducts due to friction against the inner walls, therefore the shorter and smoother the inner walls are, the less friction will occur.

An elbow or bend creates more friction than a straight duct. An additional duct length factor must therefore be added for each elbow or bend (see Table I).

This factor expresses the resistance of the bend in terms of a straight length of duct.

The additional length factor is then added to the measured duct length to give the effective duct length.

A larger duct diameter also helps to re- duce friction. The duct diameter should therefore be increased with increasing duct length.

To calculate the effective duct length.

Tabel I

Measure the actual duct length. Establish the number of elbows or bends necessary, noting the type of bend, angle and radius involved (see Table I).

Add the additional length factor as specified in Table I to the actual duct length to give the effective duct length.

The necessary duct diameter should then be found in Table II.

Note:

Drying times and energy consumption remain unaltered for 100 mm duct up to a total length of 10 m.

Longer duct may lead to slight in- creases in drying times and energy consumption but will not impair the function of the machine as long as the necessary duct diameter is used (see Table II).

Type of bend

Angle

Radius in mm

Additional duct

 

 

 

length in m

 

 

 

 

Flexible metal piping

90°

100-300

0.5

 

90°

300-500

0.4

 

45°

100-500

0.4

 

 

 

 

Plain piping

90°

100

0.4

 

 

 

 

Elbow

 

 

2.5

 

 

 

 

Concertina bend

90°

200

0.8

 

 

 

 

Segmented bend

90°

200

0.6

 

 

 

 

Wall vent kit with louvres, or window vent kit

 

 

3.8

Wall vent kit with flap, or window vent kit

 

 

 

 

 

 

1.5

 

 

 

 

Exhaust connection, left/right side

 

 

6/10

Flat section adaptor

 

 

8

 

 

 

 

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Contents Operating Manual for the T 1520 Vented Dryer Contents Guide to the machine Indicator lamps PushbuttonsImportant Safety Instructions Important Safety Instructions Your contribution to the environment Disposal of the packing ma- terialDisposal of your old machine Loading the machine Unloading the machineFollowing fabrics should not be dried in a tumble dryer Program selection Correct procedure Program is cancelled ifTo select a program To change a program during dryingPrograms NormalHand iron rr Machine ironNormal + Hand ironWarm CoolCleaning and care Cleaning the lint filters Cleaning the dryerProblem solving guide What to do if, . . . ? Cause RemedyEvent of a power Failure? Ing the drying cycle?To function? To open the door in the event of a power failure After-sales service SpecimenElectrical connection This appliance must be groundedInstallation Where to install the machineInstallation Decor panel dimensions Changing the decor panelFitting a toekick panel Installation venting Exhaust connection can be madeTo calculate the effective duct length Tabel Type of bend Angle Radius in mm Additional ductExample ResultEffective duct Internal diameter or Length m Wall vent kit example Dryer-top viewDryer-side view Wire spiral-wound hose Consumption data CottonsPermanent Press Load Final spin speed Electrical Drying time inclTechnical data Page