10. Other information - Cooling
Page 138
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– WTS-300-E - V4.1 - 20.01.2022
Information on cooling start versions 6 and 7
Both settings "6" and "7" are used for volume-dependent switching on of the com-
pressor in order to prevent the milk from freezing during robot operation when the
cooling mode starts. Depending on the quantity of milk *, the compressor is switched
on either sooner or later and then longer or shorter.
* The control calculates the current milk quantity in the tank from the entered
capacity of the feed pump [P50] and the measured duty cycle of the feed
pump.
Measured milk quantity = P50 x measured running time milk feed pump **
** The running time of the milk feed pump(s) is determined via digital inputs. I.e.
the digital inputs in the parameters [A21 - A28] need the assignment of the
settings 8, 9 or 10 (depending on the number of milk pumps). For several
milk pumps, the total pump running capacity is added -> and from this it is
the total quantity of milk.
Depending on setting „6“ or „7“ the calculation of the milk quantity starts already
-
Setting „6"
= only with the beginning of the cooling mode
-
Setting „7“
= or in the cleaning mode
Setting "7" is selected if during the cleaning of the main tank milk has already been
milked into a buffer tank and this milk is pumped into the main tank after the end of
cleaning to start the cooling mode. This amount of milk is added to the amount of
milk from the start of cooling mode.
The running time of the compressor is calculated from the formula:
If milk is transported from the feed pump into the tank while the compressor is run-
ning, the running time of the compressor will be extended accordingly.
If the compressor is switched off, it cannot start again until at least the quantity of
milk set in parameter [P53] has been added.
Cleaning *
Compressor
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
Cooling mode
*
* Settings in [P61]
6: START Cooling mode
7: START Cleaning mode
> [P55] minutes = alarm
firs
t
s
ta
rt
c
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[P
5
1
]
50
lit
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s
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[P
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3
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2
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[P
5
3
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2
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[
P
5
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[
P
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[P5
4
]
Running time compressor =
measured quantity of milk
P53
x P52
