Regulation CH–DIN regulation of all RKWINOX units The CH–DIN microprocessor regulates the chiller for all INOX units. It is located in the electrical switch box of the unit and monitors all control and safety functions: ◊ Controls and displays incoming and outgoing cold water temperatures ◊ Displays the time delay of the compressor and fan ◊ Checks that the outgoing water temperature is not too low (frost monitoring) ◊ Displays and controls all safety mechanisms that have been stopped due to a malfunction ◊ Displays the operating mode ◊ Regulates the condensation temperature The regulator consists of the basic unit to control unit operation. A fan board is connected to the basic unit that controls the rotation of the fan motors by regulating the output current depending on the liquefaction temperature. Models RKW 3600 INOX and higher have two cold cycles. The second cycle cannot be regulated by the CH– DIN basic unit because there are not enough inputs and outputs. For this reason, the extra C2-DIN regulator controls the second cycle. Programming is, however, still performed using the CH–DIN basic unit. CH– DIN panel 6 Value display Arrow keys Code display CH-DIN 8 Heat Cool ❅ 8. 8 MODE MENU Comp SET 8 STATUS MENU button STATUS button MODE button SET button 8 Alarm Line ON/OFF RESET ON/OFF RESET button The panel has two displays: the value display (three numbers on the left) and the code display (two numbers on the right). MENU STATUS MODE The buttons allow operating processes (parameters) and their associated values to be changed. SET ON/OFF RESET Value Display The value display shows the target value in degrees with one decimal place in Celsius. It can also display: ◊ All parameter settings ◊ The codes for all alarms ◊ The status of the functions ◊ The operating hours ◊ The shut-off status 8 8. 8 ◊ The current delays A square LED displays minus temperatures and an LED in the top left-hand corner shows the multiplier of the displayed value with 100. Code Display The code display indicates the number of the parameter (or the function) whose value or status appears in the value display. If a parameter is shown in the code display, the setting appears in the value display. Arrow Keys 8 8 The set value for each parameter can be changed with the arrow keys. When the parameter programming operating mode is accessed (via the MENU button), both displays show a value (continuous display). After the SET button has been pressed, the code display (parameters) starts blinking. The displayed values can be increased or decreased using the arrow keys. If the SET is pressed a second time, the value display blinks. The new values are saved by pressing the SET button again. Both displays switch from a blinking display to a continuous display. MODE Button with two LEDs The regulation mechanism was designed for use of a chiller in the cooling operating mode Cool ❅ and as a heat pump in the cooling and heating operating modes. Heat Only the summer operating mode (cooling mode) Cool ❅ may be used for all INOX units. MENU Button with one LED MENU The MENU button provides access to the parameter list and displays the parameters on the code display and the associated value on the value display. STATUS Button with one LED MODE STATUS The STATUS button provides access to the status list and displays the status settings by pressing the arrow keys. The code display shows the function number of the function list and the value display shows the corresponding setting. The codes and their descriptions are described in the table on page 8.
ON/OFF/RESET Button ON/OFF RESET This button is used to switch the unit on and off. If the alarm has been set off and the unit has to be manually reset, this button is pressed to prevent further alarms from being acknowledged. At the same time, the normal operating function of the unit is restored. Alarm LED Alarm If this LED is lit up, the unit’s alarm has gone off and operation has been interrupted. SET Button SET The parameters settings can be changed by pressing the SET button together with the arrow keys. Compressor LED This LED is not lit up when the compressor is not in operation. If this LED is blinking, the compressor is currently in start-up time delay and will begin operation after this time has elapsed. If this LED is continuously lit up, the compressor is in operation. The time delay is no longer active. Line LED Fan Board Line Comp This LED is continuously lit up when the regulation is connected to the power supply. The fan board is connected to the CH–DIN regulation. The CH-DIN (C2-DIN) regulation registers the current condensation temperature via the sensor input ST 5 (ST 6) and passes along the corresponding programmed output current to the CTK 1 (CTK 2) output of the TK 1 (TK 2) fan board. The fan motor rotation can be controlled by the modulating output current. Fan board TK 1 Fan board TK 2 C2–DIN Additional Regulations for Models RKW 3600 and higher For chillers with cooling capacities higher than 26 kW, the cooling capacity is divided among two cooling cycles. The second cycle cannot be regulated using the CH-DIN regulation because there are not enough inputs and outputs and requires an additional C2-DIN regulation. The C2-DIN regulation controls the same functions together with the CH-DIN regulation. These functions are only displayed by LEDs. An alarm from the second cycle is displayed on the CH-DIN regulation display as a code, e.g. “E 01”. The CH-DIN regulation is still used to program the settings of the second cycle. C2– DIN Additional Regulation Operating display Compressor 2 Malfunction display High pressure 2 C2-DIN Compr. High press. C2- DIN additional regulation Operating Display Compressor 2 Compr. This display lights up when the compressor of the second cycle is in operation. Malfunction Display Compressor 2 Err. compr. This display lights up when there is a malfunction in the compressor of the second cycle. Malfunction Display Fan 2 Err. fan Malfunction display Fan 2 Err. compr. Low press. Err. fan This display lights up when there is a malfunction in the fan of the second cycle. High Pressure MalfunctionCycle 2 High press. This display lights up when pressures that are too high have been set in the second cycle. Low Pressure MalfunctionCycle 2 Malfunction display Compressor 2 Malfunction display Low pressure CH- DIN regulation Low press. This display lights up when pressures that are too low have been set in the second cycle. 7