© Munters AB, 2015
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Device Menu
The Farm Premium can have many closely spaced levels of ventilation enabling it to find the optimum
average airflow for the poultry facility. Many of the levels are at exactly the same temperature setting, so
there may be a question as to how the Farm Premium chooses the correct level.
The menus in this section apply levels to ventilation, variable speed fans, curtains, and other related
matters. The levels in the various menus are consistent with each other so that a level in one menu
corresponds with that level in any other menu.
The rules that apply here are:
•
Rule 1: If the temperature is at target (in the Happy Zone) stay at the current level.
•
Rule 2: If the temperature moves outside the Happy Zone; have some patience.
•
Rule 3: After the designated delay, increase or decrease levels appropriately.
You can find the ‘patience’ factors under
HELP | SET
in this menu. They are the
increase level delay
and
decrease level delay
parameters. The factory default values are 180 seconds for an increase and 60
seconds for a decrease.
The factory default values bias the Farm Premium slightly toward warmer temperatures, as would be
appropriate for young birds. The level increase delay is longer than the level decrease delay. You may
wish to reverse these values by the time you have market age broilers, since they are more sensitive to
heat stress than to cold.
Although many of the levels have 0.0 differential temperatures, certain levels should have differentials to
account for wind chill on the birds. The first tunnel level accounts for wind chill by switching to the tunnel
temperature instead of target temperature. Higher tunnel levels require an additional wind chill because
of the increased airflow.
In addition, the last few levels before entering tunnel can form a transitional region. You may want to
build differentials from target temperature just before the first tunnel level.
The controller obeys both the time delay rules and the differential temperature rules when changing levels.
Tunnel exit has several additional rules, such as outside temperature restriction and the tunnel exit delay
described under
HELP | SET
. In addition, there are Cool Down and change to Min Vent on reaching the
Heat temperature features described in
Control | Temperature Curve | HELP | Set
The following sections detail the menu functions.
