DOL 634 CE
44
Technical User Guide
The test is to show if the connected stepless fans are set correctly, i.e. if they can run at minimum and maxi-
mum speeds, and whether they are placed correctly.
In internal fan speed controller mode, the emergency change-over switch AUT/MAN (automatic/manual) on the
side of the controller must be set to AUT (see the section
Emergency Change-over Switch AUT/MAN [
Select the menu
Technical | Manual/auto.
Then select
Climate | Air outlets | Stepless 1
and activate
Manual mode
.
Set the
Air outlet 1
required
(flap) to 100 %.
Activate
Manual mode
for
Air outlet fan speed
and set the
Air
outlet fan speed
to 100%.
Check that the fan is placed in the livestock house.
Check that the fan sucks air out of the house (e.g. by means of
a smoke test).
Check that the fan is running at maximum speed.
Set the
Air outlet fan speed
to 1 %.
Check that the fan sucks air out of the house (e.g. by means of
a smoke test).
Check that the fan is running down to minimum speed.
Set the
Air outlet fan speed
to 0 %.
Check that the fan stops completely.
If the fans are connected as 3-wire, they should not stop com-
pletely, but instead run at minimum speed.
Repeat the test for each of the stepless fans.
Test an external stepless fan speed controller in the same way as an internal controller.
12.2.1.3 Emergency Change-over Switch AUT/MAN
Only at internal fan speed controller.
Set the change-over switch to MAN (manual).
Check that the speed of the stepless fan(s) increase(s) to maximum revolutions.
Set the change-over switch to AUT (automatic).
Check that the stepless fan(s) reduce(s) the speed to the currently required speed.
If you are unsure whether the fan responds as expected, test the stepless fan. See section
.