ANTTI Plug&Dry, Installation And Operating Instructions Manual

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Antti-Teollisuus Oy 51 408116 03-2020
Start the elevator and the pre-cleaner (turn first the selector switch to position E) and tip some grain into the hop -
per. When opening the sluice gate on the ascending side, the feeding rate very rarely exceeds the lifting capacity
of the elevator.
You can start the heater via the bypass button (in the automatic control centre) even if the filling has not yet been
completed, but usually, the heater will not be started until the filling has been finished.
Observe the feeding process through the openings in the base. Visually estimated, the amount of grain running
down from both edges of each trough should be the same (the feeder blades at the sides may feed slightly more
than the other blades). The grain must not congest in the bottom cone. As the drying proceeds, the feeding rate
will gradually increase.
Adjust the air flow of the pre-cleaners to as high as possible, however, keeping a watch that no full-weight grains
end up among debris. Adjust the pre-cleaner to operate as efficiently as possible as instructed in the manual for
the pre-cleaner.
For normal drying, the suitable drying air temperature is 65–80 °C. For bread grain, seed grain and malt grain, the
upper limit is 70 °C, for turnip rape it is 65 °C , and for peas around 50 °C . It is possible to apply a temperature,
as high as 100 °C, for the fodder grain The temperature is kept constant by means of a suitable pair of nozzles.
The burner must operate continuously. If the overheat functionality of the temperature limiter stops the burner, the
burner's main nozzle is too large or the injection pressure of the burner is too high.
Adjust the air flow from the heater's air openings so that no grains of normal weight will fly to the outlet end. For
turnip rape slight "over flight" is allowed.
Keep an eye on how the drying proceeds. Measure the moisture content from time to time. Once the desired
storage humidity is reached, the setting of the outlet air channel thermostat shall be gradually decreased until the
signal light for the burner goes out (indicating that the burner has stopped). The setting of the outlet air channel
thermostat will now be left in such a position, that next time, when same kind of grain will be dried under roughly
same kind of conditions, the automation system is able to cut off the drying process as soon as the same moisture
content percentage has be reached. Write down the readings of the outlet air channel thermostat's temperature
display (at the end of the drying process) and the outside air temperature. After you have written down notes from
several drying batches, you can later make use of them and define even more precise settings for the cut-off tem -
perature of the drying automation.
Cooling
After the drying, the grain must be properly cooled. The cooling process can take less than an hour only in ex -
ceptionally cold weather conditions. If the dryer has more top tanks than drying sections, the time required for
cooling will be longer. During cooling phase, the moisture content of the grain may still drop slightly, but while in
the storage it will resume due to evening out. It pays to measure the moisture content of the grain also after the
cooling. As the circulation time of the batch during the cooling phase, depending on the size of the dryer, may be
1–2 hours, readjust the settings for the next batches taking into account that the entire grain volume must have
time to circulate inside the dryer at least one full round. (To measure the circulation time in the most reliable way,
empty the dryer at the circulation speed and measure the time).