MAKOT MCH-07 Series - Chiller Control Functionality; Delaying Cooling Process Activation

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1
Adjustments must be made so that the condition b1<b2 is always met. The values of parameters b1 and
b2 are not control temperature settings; these are the temperature values between which the control
temperature can be set (a section from the entire control temperature range of the controller).
2
This function is active only when the minimum standstill time of the unit has been set (CF).
3
Changing the parameter value is not recommended, because it can lead to incorrect operation of the
controller, and even its damage.
4
Set up during the production phase – do not change without a clear need.
3.4.2. Chiller (unit) control function.
The chiller (unit) is controlled in the cooling phase depending on the temperature in the cooling
chamber. The controller allows one or two settings to be controlled, depending on the FC
parameter settings (milk pre-cooling time – see section 3.4.1.):
• FC=0 – no pre-cooling; in this case, the settings made in t1 (see section 3.5.) are the
only temperature for cooling the milk; the cooling signal diode is permanently on,
• FC>0 – during the time set in FC, pre-cooling takes place according to the settings made
in t1 (cooling signal diode blinks) and after the time set in the FC has elapsed, cooling
according to the temperature set in t2 starts (cooling signal diode is permanently on).
At any time, you can interrupt the pre-cooling and go for cooling according to the target
temperature. This is done by pressing the button during pre-cooling; the signal diode starts
to changes its lighting to continuous.
The controller can control the cooling temperature in the range from -40
O
C to +98
O
C. In order
to limit the scope of the control so as to prevent the user of the cooling device from setting
the temperature outside this range, set the appropriate parameters in the appropriate ranges:
b1 – limiting the lower value for the control temperature range and b2 – limiting the upper value
for the control temperature range.
It is also important to set the control hysteresis correctly – parameter HI. The control hysteresis
determines the temperature difference at which the compressor is switched off and then on,
e.g. if the control temperature is set as 4
O
C, and the hysteresis on 2
O
C, the compressor will stop
after reaching 4
O
C, and its re-activation will occur after the temperature increases to
4 + 2 = 6
O
C. The controller allows setting the control hysteresis in the range from 1
O
C to 20
O
C.
ATTENTION
The set hysteresis value automatically limits the extreme values of the control range so that
the operating range of the controller is not exceeded.
3.4.3. Delaying the activation of the cooling process.
This function makes it possible to switch on the controller by pressing the button and
the cooling process will be delayed. This delay will be equal to the set time in 0d (default 0d=0).
This solution enables simultaneous activation of the controller's operation with the start of the
milking process.