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Bedienungsanleitung Steuerung S4_2006_09_25-neu.doc Page 20 / 83
© wodtke GmbH Tübingen. All rights reserved. Subject to change without notice. Month of issue xx/2007 Art. No. 950 281
5.10 Automatic operation “TW OFF” (only for Waterplus appliances)
Functional message: “TW OFF”
= appliance has been switched off via internal boiler sensor
= appliance has to be switched on manually via I/O key
= functional values can be called up via the “Menu” key
This function is only available with Waterplus appliances. “TW OFF”
means that the appliance is responding to a signal from the internal boiler
sensor inside the heat exchanger (temperature TW). The appliance has
been switched off via this sensor because the desired temperature in the
water heat exchanger has been exceeded. It will be
automatically switched on again later.
Note: If the appliance is now switched off via the I/O
key or through a class 1 error, it can no longer
respond to the external controller and will not start up
automatically again. Instead the display shows “G
OFF” and eventually the “stand-by dot” or, in the
event of an error, the “stand-by dot” flashing
alternately with the error code.
Tip: Do not switch the appliance off via the I/O
key when in the “TW OFF” state. The I/O key is
only intended for manual operation or as an
emergency switch in the event of errors.
5.10.1 Switching on and off via “TW OFF”
When the Waterplus appliance is switched off by an internal
controller after being in operation this is indicated by the messages
“G OFF” and “HE OFF” flashing alternately until the end of fan after-
run time. After this the display shows “TW OFF” alone.
When the appliance is restarted via an internal controller the display
shows “ON” and then for a few seconds the installed programme
version. If all is in order the appliance then enters preheating
programme “Aand eventually heating programme “H”.
5.11 Preheating programme “A”
= display shows “Afor preheating programme
= display shows flashing dot for feed screw operation
= display shows remaining minutes of preheating programme
In the preheating programme the ignition element is active for the
first 10 minutes after starting up, the pellets light after a few minutes
and the appliance runs to operating temperature. The air flow sensors
only become active after one minute, when the fan has reached
constant speed and an air flow has developed. You can adjust thermal
output in steps of 0.5 kW using the +/- keys. Thermal output setting only
becomes active on completion of the preheating programme when the
display changes to “H”. The appliance can also be switched off with the
I/O key during the preheating programme. It then enters the “G OFF”
state and eventually goes into stand-by.
Automatic operation no
longer possible because
appliance has been
switched to “stand-by”.
TW
OFF
G
OFF
.
OFF
TW
OFF
G
OFF
TW
OFF
wodtke
A .
- 15
20


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