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If the bypass is activated / open and heat recovery is therefore
switched off, this is indicated by a
Manual bypass control
The bypass can be operated manually if required. Pressing the
OK key in the basic display opens or closes the bypass.
It is possible to close the bypass flap after an adjustable time;
setting options are from 0.1 to 6.0 h.
A setting of 0.0 h deactivates manual control.
The factory setting is 6.0h.
HINWEIS
NOTE
Bypass switching commands from safety functions or the au-
tomatic bypass have a higher priority!
To protect from freezing at low outside air temperatures (<
+1°C), the bypass flap can be automatically moved briefly on a
regular basis. To do this, the frost protection switching interval
is set in the range 5 ... 60 min.
The factory setting is 0 min.
32
B
in the basic display.
DOK4SVxxDEN · FD 9912
Domestic ventilation unit M Flex Air (Plus)
9.7 Special functions for control
element
(with optional I/O board only)
The function of a key and the LED display for the control ele-
ment (Type 1) can be configured differently for a special func-
tion if required. The electrical terminal assignment remains un-
changed. The necessary adjustment of the input function
configuration for the key assignment is made in the service
menu under 40 - Inputs and for the output function for the LED
display in the service menu under 50 - Outputs.
Example 1:
Programming bypass switching to the
For the assignment of the
40 - Inputs / 42 Input IN_1, switch to the BYPASS function
with "Pos" signal (operating mode setting only
possible using
key)
For the status display in the service menu under 50 Out-
puts / 51 Output OUT_0, switch to the BYPASS function
with "Low" signal (error signal now only on ventilation unit
display)
Set the manual bypass control to > 0 h in the user menu
under 20 - Settings / 225 Bypass manual.
Mode of action: Each press of the ? key switches over the
bypass. If the bypass is open, an orange LED is lit. The by-
pass closes automatically after the set max. opening time
at the latest.
Example 2:
Programming time-limited shock ventilation to the
For the
key assignment in the service menu under 40 In-
puts / 41 Input IN_0, switch to the TIMER_STAGE_3 func-
tion with "Pos" signal (the operating mode can now only be
set using the
key)
Set the running time for shock ventilation in the user menu
under 20 Settings / 25 Timer max.
Mode of action: Pressing the
intensive ventilation and the unit automatically switches
back to the previously active operating mode after the set
running time.
9.8 Switch OFF lock
Switching off the ventilation unit can be blocked. For preconfig-
ured control elements, the relevant control element is selected
"without off" in the service menu under 20 - Settings /
Control elem.
Alternatively, a free unassigned digital input can be configured
for the "STAGE_OFF_INH" function / Low signal in the service
menu under 40 Inputs.
key
key in the service menu under
key
key switches to speed 3 /
21
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