Bedienungsanleitung Steuerung S4_2006_09_25-neu.doc
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© wodtke GmbH Tübingen. All rights reserved. Subject to change without notice.
Month of issue xx/2007
Art. No. 950 281
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.
W
A
0.1
