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© wodtke GmbH Tübingen. All rights reserved. Subject to change without notice. Month of issue xx/2007 Art. No. 950 281
Note:
As a consequence of wodtke air flow sensor technology the appearance of the flames may
change with changing draught conditions in the chimney and air temperature because the
speed of the fan varies in response to these parameters. This is perfectly normal and in no way
a shortcoming. It is rather this very feature that makes for optimal combustion.
The air flow sensor system also responds to the firedoor being opened, interrupting the pellet
supply. This makes it impossible to operate the appliance with the door open and classifies it as
design type 1 (self-closing door), permitting several stoves to be operated with one chimney if
this is suitably designed.
The air flow sensor also permits the temperature of the air flow sensor (TL) in the suction pipe
to be measured. Any temperature increase beyond the desired range, and any temperature
increase that is too fast (gradient), will trigger an error shutdown.
7.6 Temperature sensor at pellet chute (TP)
Located directly in the pellet chute is a temperature sensor which monitors the temperature
towards the fuel hopper. Any temperature increase beyond the desired range entered into the
software will trigger an error shutdown.
7.7 Temperature sensor at flue gas fan (TR)
Located directly at the flue gas fan is a temperature sensor which monitors the temperature.
Any temperature increase beyond the desired range entered into the software will cause the
appliance to go into modulation mode “H.M” (minimal output) see also Chapter 0. Pellets with
a high calorific value or bulk density can cause the actual thermal output of the appliance to
exceed its nominal output. This is detected by TR and duly compensated. The appliance is then
modulated to run at minimum load until it meets the prescribed values again.
7.8 Temperature cutoff (STB) + main fuse
The temperature cutoff is a mandatory safety device which switches off the appliance in the
event of excessive overheating and then has to be released manually. The location of the
release differs between models. The main fuse of the appliance is always located close to the
STB.
Position of STB + main fuse (5A, quick
-
acting)
Position of STB + main fuse (5A, quick
-
acting)
“CW 21“, “Smart“, “Topline“, “Frank”
Series “PE“
Underneath black screw cap on rear panel of stove
On the right behind the inlet grille
The STB can be released with a pointed object as soon as the appliance has cooled down
sufficiently. If the STB doesn’t stay pressed in, the temperature is still too high and the
appliance should be allowed to cool further before making another attempt.
35


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