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OMNIZONE™
50BV020-064, 50XJ064-104
Indoor Self-Contained
Remote Air-Cooled and Water-Cooled, VAV Systems
18 to 100 Nominal Tons
Controls Operation and
Troubleshooting
CONTENTS When working on this equipment, observe precautions in
the literature; on tags, stickers, and labels attached to the equip-
SAFETY CONSIDERATIONS...................... 1
ment, and any other safety precautions that apply. Follow all
GENERAL........................................ 1 safety codes. Wear safety glasses and work
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Comfort Controller I/O Module (PCB2) — This PCB Addresses — Switch 1 (SW1) is used to set each input/output module is factory installed in the 50XJ unit and controller’s address. Individual DIP switches on each board are allows additional field points (8 inputs and 8 outputs): VFD used to set the addresses for individual hardware points. PCB1 (variable frequency drive) Bypass, VAV Terminals Control, switches are factory-set for hardware points 1-15, PCB2 DIP Building Ventilation, and Heating Int
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Table 1 — Control Inputs and Outputs CONTROLLER I/O NO. DIP SWITCH SETTINGS DESCRIPTION ABBREV. TYPE Switch No. and Position Water Econ. Units Air Econ.Units Inputs SW2 SW3 SW1 Main Controller (PCB1) Addr = 1-16 Supply Air Temperature SAT Analog; 10K MCI 1 1 1 Up 1 Down 1 Up VFD Duct Static Pressure DSP 4-20mA; Internally Powered 2 2 2 Up 2 Up 2 Down COL/Safeties — CMP MUX Analog; 0-10VDC 3 3 3 Up 3 Down 3 Down (Comprs.Status; Resister Bd.) Fire Alarm/Shutdown FSD Switch closure 4 4 4 Up 4 Down
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Table 2 — Communication Cable Recommendations MANUFACTURER PART NUMBER Alpha 2413 or 5463 STATUS American A22503 Belden 8772 RED (POWER) Columbia 02525 GREEN (IO BUS COMMUNICATIONS) REMOTE OCCUPANCY CONTROL (PCB1) — This con- YELLOW trol is a field located switch, controller or timer input which, (CNN BUS COMMUNICATIONS) when activated, tells system when to switch from Unoccupied to Occupied mode. When in Occupied mode, the unit turns on the supply fan and controls supply fan speed to maintain a
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Dependencies — Water Economizer option is enabled, and Constant Building Waterflow Systems — Constant waterflow Fan is On, and Inlet Water Temperature is below set point; or configurations use two (2) water valves, only one of which is from “Remote Scheduler,” or from “Remote Linkage.” in the main water supply pipe. The second valve is located in a bypass pipe to the main outlet water pipe branched off of the Economizer mode is switched to Off or no start if: there is supply pipe immediately ahe
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by the freeze condition. Unit reset is automatic when the contacts on the freeze protection switch close again. The contacts on the freeze protection switch open below 37 F. TOWER SUMP TEMPERATURE SENSOR (50XJ PCB3) — This sensor is used for monitoring (only) the tower sump temperature. LEAVING WATER TEMPERATURE SENSOR (50XJ PCB3) — This sensor is used for monitoring (only) the leav- ing water temperature. BUILDING STATIC PRESSURE SENSOR (50XJ PCB3) — This sensor is used to control both the spee
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AIR TERMINALS AND FRESH AIR DAMPER (50XJ PCB2) — The VAV Terminal Open (TRMOP), Ventilation Output (VENTR), VAV Terminals Control (TRMCT), and Heat Interlock Relay (HIR) terminals provide dry contacts to command the VAV terminals open; a ventilation damper open; VAV terminals to control to their cooling set points; and VAV terminals to control to their heat set points, respectively. REMOTE OCCUPANCY (ROCC) (TB2 50BV, TB6 1 2 3 45 6 RED(+) 50XJ) — The 50XJ,BV unit may be commanded by a remote WHT
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Table 4 — Operative Keys CONTROLS AND FUNCTIONS Using the Local Interface Display — The Local OPERATIVE USE KEYS Interface Device (LID) is a CCN operator interface that gives Clear — performs three operations: the user the capability to view and modify all configuration and CLEAR Cancels a data entry before the user service data for the CC6400 control system. The LID also presses Enter, thus leaving the current allows the user to override all point display and maintenance value unchanged. data
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Pressing the appropriate LID numeric key (i.e., 2) and Set point Alarm, Discrete Alarm, First Out Alarm, the appropriate function key (i.e., ALRM ) to directly Runtime Alarm, and Number of Starts Alarm). access an item without having to scroll through all the NOTE: Scrolling by repeatedly pressing the function key items in that category. Press to display the first ENTER displays the name of all the items in that category, whether or not they are actually configured. Scrolling by pressing maint
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Table 6 — Quick Access Chart LID FUNCTION KEYS LID NUM. Algorithms Status History Service Alarm Setup Schedules KEY (ALGO) (STAT) (HIST) (SRVC) (ALRM) (SET) (SCHD) 1 AO—Adaptive Control Hardware Points Alarm History Function Definition Limit Set Clock Occupancy 2 AO—Cooling CV Software Points Analog Point Trace Channel Definition Setpoint Real Time Clock Setpoint 3 AO—Cooling VAV Temperature Input Discrete Point Trace System Definition Discrete Controller Password Holiday 4 AO—Fan Tracking Milli
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2. Press 3 and then . The LID display will show: If the control does not receive open/open/closed/ SET in range/in range/in range, the red alarm LED will go Controller Password on and the test will stop. 3. Press . The LID display will show: ENTER If the inputs are OK, the red alarm LED blinks once LogintoController and the test continues. Enter Password 12. Next, the control forces the Supply Fan (SF) and all of the NOTE: The LID display has two modes: Edit mode and Compressors (COMP) off, and
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22. The control forces CMP4 (compressor 4) on, if config- 4. The LID display will show: ured, then waits 5 seconds. LogintoController The LID display shows: Logged In Factory/Field Test NOTE: The user will be automatically logged off after Stop 15 min. of non-use. The yellow LED will go off, and the red LED will go Change the Default Password — To change the off. default password, perform the following procedure: 23. The control forces CMP4 off. NOTE: The password must have already been entered
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8. Enter the last two digits of the current year. Press 4. If “No maintenance” is displayed, press to EXPN/EDIT then press . The LID display will show: ENTER view the set point information. The LID display will Update Clock show: No Occupied Lo Set point 9. Press 1 and then to cause the controller to ENTER 0.30 ″ H2O update the clock. The LID display will flash. Press This is the pressure set point below which the fan is CLEAR twice to view the default display and the clock considered to be off.
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Table 7 — Controller Set Points pressing the HIST button. The LID display will show “Alarm History.” Press . The LID display will show the date ENTER DESCRIPTION DISPLAY VALUE UNITS STATUS FORCE NAME and type of alarm. SCREENS As an example, if the LID display shows: OMNIZONE::SETPT01: Supply fan Status ALARM — 10:55 11-27-02 Occupied Lo Setpoint 0.3 in H2O OccLow Occupied Hi Setpoint 0.4 in H2O OccHgh SFS Unoccupied Lo Setpoint 0.3 in H2O UnOccLow Unoccupied Hi Setpoint 0.4 in H2O UnOccHgh That
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Table 8 — Controller Hardware Points Table 9 — Software Points DESCRIPTION DESCRIPTION DISPLAY VALUE UNITS STATUS FORCE NAME DISPLAY VALUE UNITS STATUS FORCE NAME SCREENS SCREENS OMNIZONE::HWP01-32: OMNIZONE::SWP65-96: Hardware points Table 1 Software Points Supply Air Temperature 67 dF SAT Compressor 1 Status Off CLO1 Duct Static Pressure 0.2 in H2O DSP Compressor 2 Status Off CLO2 Comp. Status MUX 1.86 Volts CSMUX Compressor 3 Status Off CLO3 Fire Alarm/ShutDown Enable FSD Compressor 4 Status
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sensors installed and the configuration of these sensors in the OPERATION custom configuration, or the status of linkage. Occupancy Determination — The OMNIZONE™ If the Return/Mixed air sensor is in the mixed airstream and controller can determine occupancy in many ways. Local occu- configured as such and there is no Space temperature sensor pancy is determined by either a local schedule contained in the installed and no Linkage, the Space Control Point will display CC6400 controller, the use of
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COMRES triggers the compressor staging routine that NOTE: The reset from all methods may be limited to 10 F controls the number of compressors energized. Units are or 15 F by changing the high end point of the custom equipped with 4 compressors piped in separate refrigerant voltage input from the default (20 F) to 15 F or 10 F. circuits, and staged On/Off in a fixed sequential manner Either the return air or a space temperature sensor will be (compressor no. 1 through compressor no. 4). The comp
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Units not equipped with a water economizer can be ordered FIRE INPUT (FSD) — This is a normally closed input, which with the reverse/head pressure control valve factory installed when opened, deenergizes an isolation relay in the unit, opening and a pressure transducer located in the discharge line of the input to the controller. When this input turns On, all control compressor no. 1. outputs are immediately turned Off, including the fan. Unit reset requires manual resetting at the main controll
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LOW-PRESSURE SWITCH (LPS) — The Low-Pressure The 7-character LED displays various values, depending Switch is located in the suction refrigerant line of each upon what mode is running. compressor, and is set to open at pressures below 27 psig. It is In Standard Monitor mode: the LED displays the current wired in the 115 vac control power line of the compressor output frequency. contactor (in series with the HPS and EFS), and activates the In Status Monitor mode: monitors the status condition
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STATUS MONITOR MODE — In Status Monitor mode, it is If either or is pressed continuously, every 0.5 sec possible to monitor the VFD status (frequency command, output the next/previous item will be displayed. As optional points, voltage, current, terminal information, etc.). Status monitor RUN, STOP, displaying the frequency status, and switching to mode is entered by pressing the Setup/Program/Monitor key, local/remote and manual/auto modes can be performed. then selecting MON at the mode select
