FOODBOX TOUCH, FOODBOX LONG TOUCH, FOODBOX LIFT TOUCH
Page 18
Version 1.3 / December 2018
6.0 CooLING UNIT
The cooling unit performance control is executed by scanning 3 temperature sensors:
-sensor No.1 - is located in the lower part of the product dispensing tray;
-sensor No.2 - is located in the upper part of the product dispensing tray;
-sensor No.3 - is located on the cooling unit evaporator (fig. 11).
Notice:
Recommended temperature settings:
-
min. temperature 4±2°С;
-
max. temperature 10±2°С;
-
min. evaporator temperature 1 ± 1°С;
-
max. evaporator temperature 5 ± 1°С.
1
2
figure 11 - Location of temperature sensor No. 3
1 - Temperature sensors
2 - Buckles
ATTENTIoN!
To maintain the correct operating mode of the cooling unit, it’s important that the tem-
perature sensor No. 3 is installed correctly. It should be securely fixed on the next to
last evaporator elbow as shown in fig. 4. The sensor installation should be executed
outside the vending machine. After placing the cooling unit inside the vending machine
the sensor connector should be connected to the temperature sensor wiring harness.
6.1 operating Modes
The cooling unit operating mode control is executed by the vending machine controller. There are 4
modes of the cooling unit operation:
-standby;
-defrosting;
-cooling;
-anti-icing.
In each mode there are the cooling unit activation and deactivation, evaporator fan activation, and
deactivation, temperature sensors monitoring.
When activating the vending machine the cooling unit is switched to a
STANDBY
mode for two
minutes. The further operation is taken place in accordance with the stabilized condition algorithm.
If when activating the vending machine the evaporator temperature (sensor No.3) is lower than the
evaporator temperature minimum value, the controller is switched to
DEFROSTING
mode. When the
temperature at this sensor reaches the minimum value or higher, the cooling unit switches to
STANDBY
mode.
