Bedienungsanleitung Wodtke CW 21 Airplus S4 (Seite 25 von 83) (Englisch)

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5.15 Service prompt “WA”

= When servicing is due the display shows “WA” on starting up

using the I/O key and every 10 minutes thereafter

= display shows excess pellet throughput in tons (line 2)

= Have the appliance serviced (see Chapter 9)

= Confirm that appliance has been serviced (see Chapter 9)

Have the appliance serviced by a duly trained technician at the

latest when “WA” appears in the display. “WA” appears after a

throughput of 1.5 tons of pellets following the last reset. The number

below “WA” states for how long servicing has been overdue. Thus

0.1 means that 0.1 tons of pellets have been burnt since servicing

became due. “WA” can be reset from menu level 1 after servicing

(see Chapter 9), and the counter then starts counting again from

1500 kg. At menu level 1 you can also inquire how many kg of

“standard pellets” (explanation see below) can still be burnt before

servicing is due again (see Chapter 0).

Note:

Servicing may become necessary before “WA” appears, especially if the pellets have an

ash content greater than 0.5% or the burner pot has not been cleaned regularly (see

Chapter 0)!

Some tips of advice:

• Ask you supplier to confirm the ash content of your pellets in writing. This is a

significant determinant of servicing frequency. High-quality pellets usually have an

ash content of no more than about 0.2 to 0.3%!

• Clean the burner pot regularly (see Chapter 0)

• Make a service contract with your dealer.

Example of the influence of pellet quality on servicing frequency:

Our recommended service interval of 1500 kg of pellet throughput refers to high-quality pellets

with an ash content of 0.25%. An ash content of 0.5% (i.e. twice as high) shortens the service

interval to 750 kg because twice the amount of ash and soot will arise per unit of pellet weight.

An ash content of 1% (i.e. 4 time higher than normal) accordingly reduces the permissible

throughput between servicings by a factor of 4, i.e. to 375 kg. This is not reflected in the display,

since this only refers to standard pellets.

Definition of standard pellets:

Wodtke appliances perform electronic calculations of pellet consumption etc. using formulas

based on the following definition of standard pellets: Standard pellets have a diameter of

6 mm, a uniform length of 1 cm, a bulk density of 650 kg/m³ and an ash content < 0,25%. In

practice these values vary between pellet brands as well as between delivery batches, and the

actual amount of pellets consumed can therefore deviate from the value shown in the display.

0.1

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