DOL 339 is updated with new functionality
The new functionality is as follows:

Max. ventilation and cooling - Tunnel mode
The maximum air velocity in Tunnel ventilation can now be regulated through a graph in relation to the age of the animals. Max. ventilation can be entered as a function of the age of the animals. (An example: a maximum air velocity of 1.5 m/sec. when the broilers are 10 days old, 1.9 m/sec. when they are 15 days old etc.).

As it was the case up till now, "start cooling" can be activated by the temperature (set temp. and set cooling) or by the air velocity (start cooling m/sec.). Now, also a graph for "start cooling m/sec." has been introduced, so the cooling can be started at a relatively low air velocity (young birds) and at a higher air velocity when the birds are older.

Heat control - several heat sources
Whereas heat control has previously been in parallel for several heat sources, it is now possible to choose for it to be sequential. This means that you can choose to exploit a heat source 100% before the next heat source is connected.

Heat control on the basis of "the sensed temperature"
Heat control in Tunnel mode has changed so the regulation is conducted on the basis of the temperature sensed by the animals and not the measured temperature which was the case up till now.

Change from stepless to stepwise regulation concerning the outlet
The regulation of the air outlet from stepless to stepwise regulation has been slightly changed. Previously, DOL 339 automatically changed to stepwise regulation when the gable fans for Tunnel ventilation were used in side mode. The change is still conducted automatically in the new software but it is now possible manually to change the time of transition from stepless to stepwise regulation.

In addition, this function is available when the controller is used in an LPV system. It is possible to activate stepwise regulation when the wall fans in the house end are connected.