Bedienungsanleitung Wodtke Family.nrg (Seite 41 von 68) (Englisch)

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16 Maintenance (WA Display)

The functionality of your unit depends decisively

on proper and regular maintenance. Maintenance

frequency, in turn, depends decisively on your pel-

let quality and regular cleaning by the operator.

Soot is an excellent insulator, which means that

units which are not maintained can emit continu-

ally less heat to the outside or to the heat ex-

changer and efficiency drops as a result. Follow-

ing maintenance, energy is optimally utilised again

and you will save on heating costs, as well as pro-

tect the environment.

Maintenance of the unit must be performed no

later than after consuming 1.5 t of pellets (or

earlier, depending on pellet quality), or when

the WA indicator appears.

Maintenance may also be necessary at an earlier

time, particularly if the ash content of the pellets

exceeds a value of 0.5% or the burner pot is not

regularly cleaned.

Attention / Danger:

Units which are not maintained according to

our specifications may not be operated. All

warranty claims are void in case of non-com-

pliance

Our tips:

 Have the ash content of your pellets

confirmed in writing by the supplier, it

is the essential characteristic for

maintenance frequency. Quality pellets

generally have only about 0.2 to 0.3%

ash content!

 Regularly clean the burner pot.

 We recommend having maintenance

performed by a qualified installer. Enter

into a maintenance contract with your

qualified installer.

Example of the influence of pellet quality on

maintenance frequency:

The maintenance interval of 1,500 kg of pellet

through-put is based on quality pellets with 0.25%

ash content. If the ash content is 0.5% (that is,

twice as high), the maintenance interval reduces

to 750 kg, because twice as much ash and soot

occurs. If the ash content were to even equal 1%

(that is, 4x higher than normal), the through-put

between maintenance would likewise reduce by a

factor of four, or to about 375 kg. This is not taken

into consideration in the unit's display, because

this assumes the use of standard pellets.

Our company defines standard pellets in the for-

mulas stored in the control electronics for calcula-

tion of the maintenance indicator as follows:

Standard pellets have a diameter of 6 mm, a uni-

form length of 1 cm, a bulk weight of 650 kg/m³

and an ash content of 0.25%. Because these val-

ues can differ in practice from pellet type to pellet

type and batch, the volume of pellets actually put

through can differ from the displayed value. Note:

due to the internal data processing in the unit

(rounding of operating cycles), a maximum numer-

ical error deviation of all meter readings of 10% is

possible.

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