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User selection 2
EM-box (damper option)
With User selection 2, the same options are achieved as with User selection 1. In
addition, you get the option of a relay output that can control e.g. a damper or
whatever need one may have to control an external function.
User selection 2 potential-free input is connected to TF13 and User selection 2
output is connected to relay R7 on the PCB board.
If it is desired to run the cooker hood over the ventilation system, it may in some
cases be difficult to get enough air for the cooker hood.
With an EM box installed and when the cooker hood is in operation, you can reg-
ulate the extraction so that less air is extracted out of the other rooms, e.g. bath-
room and utility room so that there is enough air for the cooker hood to extract
sufficiently.
The EM box is equipped with a metal filter that effectively cleans the cooker
hood air of grease particles, as extra protection for the ventilation unit.
Dimensional drawing:
The system works as follows:
When the cooker hood is switched on, User selection 2 is activated. The
ventilation unit increases the ventilation and at the same time sends an
output signal to the EM box that it must close the damper for extract air
from the other rooms. However, the damper does not close completely
in, there will still be extraction from the other rooms, just reduced.
When balancing, the small stop blocks on the damper must be set so that
the basic ventilation is maintained from the other rooms.
The EM-box solution is connected to the PCB board via the following elec-
trical diagram:
L
N
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