Type 8660 Control Center ________________________________________________________ Control Center Type 8660 (Apparatus Variations 1, 2 and 3) 1.7.
Type 8660 Control Center ________________________________________________________ Contents Page 1. Features and Application Possibilities........................................................... 4 2. Notes on Safety............................................................................................. 5 3. Installing the Control Center.......................................................................... 5 4. Apparatus Variations of the Control Center..............................
Type 8660 Control Center ________________________________________________________ Contents Page 7.3 7.3.1 7.3.2 7.3.3 7.3.4 7.3.5 7.3.6 7.3.7 Operating Options in Operational Mode Ignition on and Motor off (ZE)........ 24 Overview of the possible operating options in ZE......................................... 24 Changing the air flow direction in ZE............................................................. 24 Switching the Defrost function on and off in ZE...........................................
Type 8660 Control Center ________________________________________________________ 1. Features and Application Possibilities (Overview) The Control Center is a fully-featured, easy to use, microprocessor-based control unit. Especially designed for the heating and air conditioning of commercial passenger buses, it enables an economical control of the temperature and air flow for the driver and, to a lesser extent, also for the passengers. It has the installation format of an auto radio.
Type 8660 Control Center ________________________________________________________ 2. Notes on Safety To ensure that the Control Center functions faultlessly and has a long life, the user must observe the instructions in this user's manual, and pay attention to the usage conditions and the allowable data according to the data sheet. Installation and maintenance personnel must have been trained and authorized to carry out such activities.
Type 8660 Control Center ________________________________________________________ 4. Apparatus Variations of the Control Center The Control Center is offered in three variations, which are differentiated by the extensiveness of the controllable capabilities: • Control Center 1 • Control Center 2 • Control Center 3 In the following table, the controllable capabilities for each of the three Control Centers are marked with an 'X'.
Type 8660 Control Center ________________________________________________________ 5. Connections 5.1 Wiring diagram Plug wiring diagram for Control Center 1 Figure 1 shows the backside of Control Center 1 with the plug area (right) and the symbol list for the pins (left). The plug holds pins 1 to 36. The symbols for the individual pins correspond fully with the symbols on the operating elements (see Figure 7 and Figure 8).
Type 8660 Control Center ________________________________________________________ Plug wiring diagram for Control Center 2 and 3 Figure 3 shows the backside of Control Center 2 and 3 with the plug (right) and the symbol list for the pins (left). The plug holds pins 1 to 36. The symbols for the individual pins correspond fully with the symbols on the operating elements (see Figure 7 and Figure 8). For further clarification, the plug wiring diagram is described again in words in Figure 4.
Type 8660 Control Center ________________________________________________________ Figure 4: Plug wiring diagram for Control Center 2 and 3 (CC: Control Center) Reverse polarity protection: The supply inputs of the Control Center are permanently protected against reverse polarity of ground and plus (up to +30 V DC). Short circuit protection: Terminals 35 and 36 (front box valve motor) are only protected against a short circuit with ground, but not against a short circuit with +24 DC.
Type 8660 Control Center ________________________________________________________ 5.2 Signal inputs - input for feedback Ignition on Pin 5 - input for feedback Motor on Pin 6 - input for feedback Illumination on Pin 7 - input for feedback Supplementary heater on (only for Cont. Cen. 2 + 3)Pin 15 - input for feedback Cooling unit on (only for Control Center 3) Pin 24 - input for the potentiometer sliding contact connection of the front box valve Pin 33 5.
Type 8660 Control Center ________________________________________________________ Signal outputs for Control Center 2 and 3 - output signal for the control of the front box flaps windshield Pin 8, 9 (max. 0.5 A) - output signal for the control of the front box flaps floor area Pin 17, 18 (max. 0.5 A) - output signal for the control of the front box blower level 1 (max. 15 A) - output signal for the control of the front box blower level 2 (max.
Type 8660 Control Center ________________________________________________________ 5.4 DIP-switch (only for Control Center 2 and 3) DIP-switch 1: Presettings for the passenger area roof unit (passenger area blower or roof blower) Setting on: passenger area blower will be automatically switched on when the motor is switched on, and when the motor is switched off, the blower will also switch off. The blowers can additionally be switched on and off with the appropriate key.
Type 8660 Control Center ________________________________________________________ 6. Structure of Heating and Cooling Systems and Control Center Functions 6.1 System structure Figure 6 shows a possible structure for the heating and cooling system of an passenger bus.
Type 8660 Control Center ________________________________________________________ 6.2 Functions Heating operation The cooling water which is heated by the motor of the bus has a temperature of approximately +80 ºC. By means of a water pump in the motor and the supplementary water pump, the heated water is directed by a motor valve with variable flow (front box valve) from the heat exchanger in the front box over a thermostat controlled valve, to the heaters in the floor and roof areas.
Type 8660 Control Center ________________________________________________________ Cooling operation Air which is directed into the front box area can be cooled by the cooling unit, when the motor is running. It must be noted that only a constant cooling performance can be achieved when the cooling unit is switched on. The amount of cooled air that is sent into the front box area can be adjusted with the front box blower levels.
Type 8660 Control Center ________________________________________________________ 7. Operating the Control Center 7.1 Operating and display elements Figure 7: Operating and display elements of the Control Center On the front panel (Figure 7), there are three rotatable knobs (two rotary switches and one rotary potentiometer), a display (digital) and four keys. The left knob is used to adjust the air flow direction and to choose the collective function Defrost. It locks into each respective position.
Type 8660 Control Center ________________________________________________________ (CC – Control Center) Figure 8: Definition of the operating elements - 17 -
Type 8660 Control Center ________________________________________________________ 7.2 Operating Options in Operational Mode Ignition off (ZA) 7.2.1 Overview of operating options in ZA In the operational mode Ignition off, depending on which apparatus variation is used (Control Center 1, 2 or 3), the following operating options can be executed: • Displaying the weekday and the time (only with Control Center 2 and 3). The real-time clock continues to run when the ignition is off.
Type 8660 Control Center ________________________________________________________ 7.2.2 Setting the real-time clock in ZA (only with Control Center 2 and 3) When the system is in operational mode Ignition off (ZA) and the Temperature set point knob is turned to the clock symbol (Figure 9), the weekday will be represented on the display with the digits 1 (Monday) to 7 (Sunday), interchanging (1.5 sec. / 1.5 sec.) with the time.
Type 8660 Control Center ________________________________________________________ If however, in the setting mode Weekday, the hour and minute keys ( , ) are simultaneously pressed, the system will switch into the setting mode Time (hour and minutes). The LED’s in the keys and blink. This means that when the keys are now pressed once or repeatedly, the hour or the minutes can be set. If the keys and are simultaneously pressed, the system will return to the setting mode Weekday.
Type 8660 Control Center ________________________________________________________ the setting mode Switch time (hours and minutes). The LED’s in the keys means that when these keys or and blink. This are now pressed once or repeatedly, the hour or the minutes when the supplementary heater should be switched on can be set. If the keys and are simultaneously pressed, the system will return to the setting mode Day and Condition of the timeswitch.
Type 8660 Control Center ________________________________________________________ With the exiting of the setting mode Day and Condition of the time-switch, or the setting mode Switch time, the changes which have been made to the time-switch day or the switch time will be saved and active. When at least one time-switch day is active (on), the symbol next to the Temperature set point knob will be illuminated.
Type 8660 Control Center ________________________________________________________ 7.2.7 Switching the supplementary heater on and off in ZA (only with Control Center 2 and 3) The supplementary heater can be switched on or off, in operational mode Ignition off, by pressing the key , or over the time-switch. When the key is used to switch it on, initially a blinking light will show that the supplementary heater has been addressed by the Control Center.
Type 8660 Control Center ________________________________________________________ 7.3.
Type 8660 Control Center ________________________________________________________ 7.3.4 Switching level 1 of the front box blower on and off in ZE When the Front box blower knob is adjusted in operational mode Ignition on and Motor off, only blower level 1 can be switched on or off. If the set point regulator points to the symbol 0, then the blower is switched off; if it points to the symbol for level 1, 2 or 3, then blower level 1 is switched on. 7.3.
Type 8660 Control Center ________________________________________________________ 7.3.7 Switching the fresh air / circulation air flap on and off in ZE (only with Control Center 2 and 3) Pressing the key causes the motor of the fresh air / circulation air flap to run for 60 seconds. If the LED in the key is lit up, the flap is in the Circulation position. If the LED is switched off, the flap is in the Fresh air position. 7.4 Operating Options in Operational Mode Motor on (ME) 7.4.
Type 8660 Control Center ________________________________________________________ 7.4.2 Changing the air flow direction in ME The air flow direction can be changed by adjusting the Air flow direction knob. When the knob is pointed to the symbol for Air flow to windshield, Air flow to windshield and to driver or Air flow to driver, the air flow will be directed in the corresponding direction. 7.4.
Type 8660 Control Center ________________________________________________________ 7.4.6 Switching the supplementary heater on and off in ME (only with Control Center 2 and 3) In operational mode Motor on, the supplementary heater can only be switched on and off by pressing . It can only be switched on when the position of the front box valve is greater than 15%. the key When the valve position is less than 10%, the supplementary heater will be automatically switched off.
Type 8660 Control Center ________________________________________________________ 7.4.9 Switching the passenger area floor unit on and off in ME Operation for Control Center 1: With Control Center 1, the passenger area floor unit can only be switched on or off using the key. The LED in the key lights up, when the unit is switched on. Operation for Control Center 2 and 3: By pressing the key , levels 0 (off), 1 and 2 of the passenger area floor unit can be switched.
Type 8660 Control Center ________________________________________________________ 7.4.11 Switching the cooling unit on and off in ME (only with Control Center 3) At the position which is furthest to the left of the temperature set point regulator is the switch to turn the cooling unit on and off. Locking the switch in and then out again, switches the unit on. Feedback is shown on the display. When AC blinks there, it means that the cooling unit has been contacted by the Control Center.
Type 8660 Control Center ________________________________________________________ 8. Valve Check When the power supply is connected for the first time, the Control Center runs a lengthy valve check, to read through the end positions. In the process, the valve will be opened during a time span of 70 seconds, then closed 70 seconds. A check will also be made to make sure that a pre-defined opening angle is exceeded. The display during the valve check: test.
Type 8660 Control Center ________________________________________________________ heater/hour key will blink. This key is used to quit the error message. Pressing the key will clear the display and stop the blinking of the light-emitting diode, and further operational activity is possible. The error message will not be saved, and will appear only when the corresponding unit is contacted. Possible causes: - Drive power supply interrupted. - Potentiometer feedback interrupted.
Type 8660 Control Center ________________________________________________________ 10. Maintenance and Care 10.1 Maintenance The Control Center is maintenance-free. If disturbances occur, which are not caused by incorrect operation, and are not handled in Chapter 8, the unit must be sent back to the supplier. 10.2 Care The front panel may be occasionally wiped with a moist cloth, with perhaps a mild soapy solution. Detergents and chemical solvents may not be used.
Type 8660 Control Center ________________________________________________________ 11. Technical Data 11.
Type 8660 Control Center ________________________________________________________ Appendix 1: Flow Chart for Setting the Real-time Clock Notes Ø It is only possible to set the real-time clock in operational mode Ignition off. Ø The weekdays are represented by 1 (Monday) to 7 (Sunday). Ø All changes which are made to the time and weekday are active as soon as the setting mode is exited.
Type 8660 Control Center ________________________________________________________ Appendix 2: Flow Chart for Setting the Time-Switch Notes Ø It is only possible to set the real-time clock in operational mode Ignition off. Ø The time-switch days are represented by 1 (Monday) to 7 (Sunday). Ø When the setting mode Day and Condition of the time-switch is active, the time-switch day which is first shown will be the day following the current weekday.
Contact addresses / Kontaktadressen Germany / Deutschland / Allemange Bürkert Fluid Control System Sales Centre Chr.-Bürkert-Str. 13-17 D-74653 Ingelfingen Tel. + 49 (0) 7940 - 10 91 111 Fax + 49 (0) 7940 - 10 91 448 E-mail: info@de.buerkert.com International Contact addresses can be found on the internet at: Die Kontaktadressen finden Sie im Internet unter: Les adresses se trouvent sur internet sous : www.burkert.
