026-1705 Rev 7 06-APR-2010 MultiFlex Condensing Unit Board (CUB-II and CUB-TD) Installation and Operation Manual
240 Town Point Drive NW Suite 100 Kennesaw, GA 30144, USA Phone: 770-425-2724 Fax: 770-425-9319 ALL RIGHTS RESERVED The information contained in this manual has been carefully checked and is believed to be accurate. However, Computer Process Controls, Inc. assumes no responsibility for any inaccuracies that may be contained herein. In no event will Computer Process Controls, Inc.
Table of Contents 1 OVERVIEW OF THE MULTIFLEX CUB-II AND CUB-TD .................................................................................. 1 1.1. THE MULTIFLEX CUB-II.............................................................................................................................................. 1 1.2. THE MULTIFLEX CUB-TD ........................................................................................................................................... 1 2 MOUNTING AND POWERING..
6.2. CONDENSER FAN CONTROL ....................................................................................................................................... 16 6.2.1. Temperature Differential (TD) Strategy ............................................................................................................. 16 6.2.1.1. TD Control Fail-Safes.......................................................................................................................................................
THE MULTIFLEX CUB HAND-HELD INTERFACE........................................................................................... 44 8.1. CUB HAND-HELD TERMINAL STATUS SCREENS ....................................................................................................... 44 8.1.1. Pressure Status.................................................................................................................................................... 44 8.1.2. Case Temp Status ..............................
8.2.10.4. Sensor Control Screen 4 (Alarm Priority, Comb Method) ............................................................................................. 60 APPENDIX A: TD QUICK START ............................................................................................................................... 62 APPENDIX B: CASE TYPE DEFAULTS .....................................................................................................................
1 Overview of the MultiFlex CUB-II and CUB-TD The MultiFlex CUB-II and CUB-TD boards are “smart” input/output boards designed to control single condensing units. A single condensing unit is a self-contained compressor and condenser bearing unit which controls refrigeration in a single case line-up or walk-in cooler. The MultiFlex CUB-II controllers are capable of commanding compressors, condensers, refrigeration, and defrost for a single condensing unit using on-board I/O and control algorithms.
2 Mounting and Powering The MultiFlex boards are usually mounted by the refrigeration equipment manufacturer. Therefore, the installer need only make the necessary connections between the boards and the site controller(s). 2.1. Snap-Track Installation MultiFlex boards not supplied in a custom panel or other enclosure are supplied with a snap-track for easy installation. The insulation sheet and I/O board must be removed from the track before the track is mounted. The snap-track is mounted using the 0.
2.2. The Plug-In Output Board The additional board makes the MultiFlex CUB boards considerably taller than the MultiFlex 16 and other CPC I/O boards. If you will be mounting these boards in an enclosure, the board will need at least 2.5” of clearance between the baseboard and the panel door. 2.3. Powering the MultiFlex CUB Board WARNING: All models of MultiFlex require a 24VAC Class 2 input power source. The MultiFlex CUB-II requires the power source to be non-center-tapped. Refer to Section 2.3.1.
2.3.1. Choosing Transformer Sizes In most site installations, a single transformer will power multiple devices. Choose a transformer with a VA rating large enough to power all devices that will be attached to it. Table 2-2 gives the VA ratings of the MultiFlex CUB in conjunction with other MultiFlex boards. Refer to your site controller’s manual for VA ratings of the other I/O boards that may be powered by one of these transformers.
2.3.2.1. New-Style MultiFlex CUB Boards (With Isolated Power Supply) The new-style MultiFlex board can be connected to any of the center-tapped transformers mentioned in Table 2-2, provided the 0V terminal of the board is connected to an earth ground. In addition, the MultiFlex CUB boards can be powered by one of the 50VA or 75VA noncenter-tapped transformers listed in Table 2-1 on page 3. Figure 2-6 shows how to wire the transformers to the MultiFlex boards.
Verify that neither side of the transformer secondary is connected to earth ground before powering the old-style MultiFlex board. A grounded secondary will damage the MultiFlex board. Use these formulas to determine if the wire gauge you are using fits within specification: 14 AWG: Feet = 1920/VA In addition, the old-style MultiFlex CUB boards can be powered by one of the 50VA or 75VA non-center-tapped transformers listed in Table 2-1 on page 3.
3 The I/O Network Although the MultiFlex CUB can operate as a stand-alone controller, it relies on an E2, Einstein, or REFLECS unit for advanced features such as remote dial-in/dial-out, logging, and alarm control. All MultiFlex boards and controllers use an RS485 Network connection to communicate with an E2, Einstein, and REFLECS site controllers.
3.1.2.1. Numbering the MultiFlex CUB The MultiFlex CUB is a unique board type on the RS485 Network by the CPC controllers. Each CUB that will be associated with an E2 or Einstein must have a unique number from 1 to 31, which is configured by setting the first five switches on dip switch bank S3. 3.1.4. Setting the Terminating Resistance Jumpers All MultiFlex boards and other RS485 devices have a set of terminating resistance jumpers (one jumper for each wire lead).
4 CUB Input and Output Setup 4.1. The Inputs All Pressure Transducers, Humidity Sensors, and Refrigeration Transducers Pressure and refrigeration transducers and humidity sensors are to be wired with shielded, 3 conductor, at least 22 GA wire (Belden #8771 or equivalent). Dewpoint and Light Level Sensors 4.1.1. Connecting Sensors to the MultiFlex CUB These sensors are to be wired with shielded, 4 conductor at least 22 GA wire (Belden # 8729 or equivalent).
4.1.2. Power Connection If power is needed to operate the sensor, four points are provided on the MultiFlex board that supply DC power: one +12VDC point, and three +5VDC points. See Figure 4-3 for the location of these points. Figure 4-3 - Input Board Power Sources To connect to one of the DC power sources, simply connect the sensor’s power wire to one of the terminals. A sensor that requires 24VAC can be powered off the MultiFlex’s own 24VAC power connection.
4.2. The Outputs The MultiFlex CUB has eight relays that energize and de-energize to control output loads. When setting up an output on one of these relays, you must make two important decisions: 1. Do you want an ON command from your controller to mean “energize the relay” or “de-energize the relay,” and 2.
4.2.1. Relay Output Ratings and Fuse Protection Each relay output on the MultiFlex Combination I/O boards is rated for up to 240 VAC with a maximum current of 2 amps. Table 4-1 lists the inputs with assigned defaults. If you choose to not use the defaults listed, you may change any or all of them in the system software (see Section 7.3.7., Screen 7: Outputs and Section 8.2.8., Outputs Screens). Each relay is fused with a 2 amp fast-blow 5mm x 20mm fuse, Bussman GMA-2 or equivalent. 4.2.2.
5 Board Status LEDs When a MultiFlex board is powered up, you will be able to determine the operating status of the board by observing its status LEDs. Figure 5-1 shows the location of the MultiFlex’s status LEDs. Figure 5-1 - MultiFlex Status LED Locations 5.1. Status LED The Status LED blinks green once per second to show that the board is powered and operational. If this light is dark, the board has likely lost power. 5.2.
ther the I/O Network is down or it has not yet been commissioned in the E2, Einstein, or REFLECS Network Configuration screen. Code B Failure Conditions • Blinking 2 times/second - The battery on this board that backs up the CUB configuration during power failures has failed. If you see this light flashing, the battery will need to be replaced to avoid loss of configuration.
6 MultiFlex CUB-II and CUB-TD Software Overview The CUB-II is capable of controlling all vital systems of a single condensing unit, including compressors, condenser fans, evaporators and case circuit systems. Extended logging and alarm control capabilities require connection to an E2 or Einstein RX refrigeration controller. 6.1.
6.2. Condenser Fan Control 6.2.1. Temperature Differential (TD) Strategy Temperature differential strategy attempts to keep a minimum amount of difference between the temperature of the refrigerant and the ambient temperature. The CUB-II and CUB-TD temperature differential strategy uses drop leg temperature for the refrigerant temperature and plenum temperature for the ambient temperature. The formula for determining the TD control value is: TD = (dropleg temp) + (dropleg offset*) plenum temp.
6.2.3. Case Temperature Control Case temperature control supports using a combination of up to six case temperature inputs as the control input. The CUB-II also supports multiple strategies for combining multiple case temp inputs, including minimum temp, maximum temp, and average temp. 6.4.1. How Cut In/Cut Out Control Works Cut In/Cut Out setpoints work differently depending upon whether the Cut In/Cut Out setpoint is higher. Cut In Higher Than Cut Out 6.3.
Cut In Lower Than Cut Out read this value into Global Data as SPARE ANLG02. All other CUB-IIs that are assigned to zone 2 will read SPARE ANLG02 as the motor room temp. 6.4.2.1. Exhaust Fan Control The CUB-II in each zone that is reading the motor room temp may also use the input to perform Cut In/Cut Out control of a single output. This can drive an exhaust fan or similar HVAC device. 6.4.2.2.
Resetting a High Discharge Trip Resetting a high discharge trip safety mode can be done manually by closing the Alarm Reset input on the CUB-II or by resetting the High Discharge Trip alarm in the E2 or Einstein alarm log. You can also program the CUB-II to autoreset when the discharge pressure falls below the discharge trip setpoint minus a user-defined differential. This ensures the pressure will drop well below the trip setpoint before re-starting the compressor.
Resetting a Compressor Proof Failure Resetting a Compressor Proof Failure Safety mode can be done manually by closing the Alarm Reset input on the CUB or by resetting the Compressor Proof Fail alarm in the E2 or Einstein alarm log. You can also program the CUB-II to autoreset when the proof input state indicates the compressor is physically behaving as commanded. When using auto-reset, you may also set a maximum number of auto-reset attempts.
6.6.2. Clean (Wash) Switches Some refrigerated cases may be outfitted with clean switches (also called “wash switches”) that disable all case systems so that they may be cleaned or serviced. The CUB-II will respond to a contact closure of a clean switch by locking the compressor, defrost, and case fans OFF for as long as the switch is active. The CUB-II may be programmed with a failsafe time to prevent the case from being in clean mode for too long.
7 The MultiFlex CUB E2/ Einstein Interface This task is performed in the Controller Setup screen. To access this screen: Einstein NOTE: In this section of the manual, the term "CUB" will be used to mean "CUB-II and, if appropriate, CUB-TD." Not every instruction and system setup in this section will apply to the CUB-TD (only those related to TD condenser control).
press - Controller Status). If E2 or Einstein and the CUB boards are communicating, this screen will show the CUB boards as Online. If not, they will be shown as Offline. 7.1.2. Deleting a CUB To remove a CUB from the E2 or Einstein: Einstein 1. Log in to the Einstein. E2 1. Log in to the E2 2. Press to access 2. Press the MENU the System Configuration key. Menu. 3. Press to navigate to 3. Press - Network Stathe System Configuration tus/Setup Menu. 4. Press - Connected I/O 4.
is a large amount of information on a CUB status screen, status information is grouped on this screen in several groups of related information in order to make the screen easier to read. These groups are described below. 7.2.1. Inputs and Setpoints All the major control inputs for a CUB and the control setpoints are grouped together in the left side column of the screen. Case Temp 1-6 The Case Temp fields numbered 1 through 6 show the current value of the case discharge air temperature sensors.
Defrost Term Temp This field shows the current value of the defrost termination sensor in the CUB, which may be a digital value (ON/OFF) for a Klixon type sensor or a temperature value, depending on the selected defrost termination type. 7.2.2. Sensor Control The input and output information for the CUB sensor control applications is shown in the box in the bottom left corner of the screen, labeled AV01 and AV02 on the left side of the screen.
Evap Fan This field shows the ON/OFF state of the case circuit fans. 7.2.4. Defrost Information about defrost for the CUB case lineup is shown in the fields at the bottom right side of the screen. Peak Temp @ defrost This field shows the highest case temperature value recorded during the last defrost cycle. Defrost Term Type For reference, the Defrost Termination Type is displayed on this screen, showing the strategy that is being used to terminate defrost cycles.
To begin programming a CUB, navigate to the CUB Status Screen for the board you wish to program (see Section 7.2.). For Einstein, press followed by to enter the Setup Editor. For E2, press . 7.3.1. Screen 1: General Cond Strategy The Condenser Strategy determines whether the condenser will be controlled by discharge pressure (Pressure) or by temperature differential strategy (TD). Use the Look-Up Table ( for Einstein, for E2) to select a strategy.
Wash Switch The Wash Switch field specifies whether this condensing unit has a clean switch to toggle the case circuit in and out of Wash mode. If a clean switch input is available, set this field to ENABLE. 7.3.2. Screen 2: Setpoints Eng Units Engineering Units determines whether engineering units for pressure values will be displayed using English units (pounds per square inch (PSI) ) or metric units (kilopascals (KPA) ).
The Combination Method determines how multiple case temperature sensors in the case circuit will be combined into a single control temperature value for use in comparing to the temperature setpoint. There are five strategies to choose from: • AVG - The average value of all case temperature inputs. • MIN - The lowest sensor value of all the case temperature inputs. • MAX - The highest sensor value of all the case temperature inputs.
Min Suct Press Drop Leg Min The Minimum Suction Pressure setpoint serves two purposes. When the condensing unit is operating in Refrigeration mode using the Temperature strategy, the Minimum Suction Pressure is the suction pressure at which the compressor will be shut off regardless of the case circuit temperature. This setpoint is necessary as a safety feature since the CUB is controlling by temperature instead of by suction pressure.
It is recommended you program this fan with a higher Cut In setpoint than condenser fan #1, so that this fan will come on as a second stage. This input is automatically configured, and is primarily displayed in this screen as a reference. Fan 2 Cut Out The Remote Input is passed to any of the CUB’s outputs that are set up as “Remote” type outputs.
7.3.4. Screen 4: Aux Inputs Linear 1 and Linear 2 Fields If you wish to use a sensor type not directly supported by the CUB, and the sensor type has an output voltage between 0 and 5 volts DC, you may assign this sensor one of the two Linear sensor types (Linear 1 and Linear 2). You may then connect the sensor to a point on the CUB and designate the point as sensor type Linear 1 or Linear 2 (see Section 7.3.3., Screen 3: Inputs).
There are sixteen rows on this screen labeled from #1 to #16, corresponding to the input points on the MultiFlex CUB board. For each input that has an input device connected to it, configure the Input, Type, and Offset fields. Input The Input field is where you must specify the function of the input device attached to the point. With the cursor in this field, use the LookUp Table (press for Einstein, for E2) to choose one of the inputs supported by the CUB.
Offset Term. Type The Offset field allows you to calibrate a sensor by adjusting the raw sensor value by a fixed amount. The value entered in the Offset field will always be added to the raw sensor value in the engineering units designated for that sensor. The Termination Type determines which sensor’s value will be used to determine when a defrost cycle must be terminated. There are six options: An offset can also be used to subtract from a raw sensor value.
Fan ON Dly This parameter delays the amount of time the CUB will wait after a defrost has ended before turning on the evaporator fans. This delay is designed to keep the fans from blowing moisture off the coil and onto the case doors or walls. Enter the desired delay in hours:minutes:seconds (H:MM:SS). Defrost Dur. The Defrost Duration is the maximum amount of time a defrost cycle will last.
The descriptions below describe what the purpose of each output shown on this screen are. For each output definition, you may: • Share the value with another E2 or Einstein input - Enter a controller/application/input address in the output definition, or press - Alternate I/ O Formats to change the definition to a board/point or fixed value. • Set up logging or change logging parameters Move the cursor into the output definition, and navigate to the Logging Setup screen ( in Einstein, in E2).
SAFETY MODE When certain conditions are detected, the CUB and CUB-TD operate in a special mode called Safety mode. The options are: OK, PhaseFail, OilFail, HiDischTrip, ProofFail, DoorOpenTime, CleanTime. 7.3.8. Screen 8: CUB Outputs CONTROL TYPE The active compressor control type. DIG OIL FAIL The current value of the CUB’s oil failure input. COMPRESSOR The current ON/OFF state of the compressor. COND FAN 1 through COND FAN 4 The current ON/OFF state of condenser fans #1 through #4.
alarm is active in one or more CUB systems. Select one of the following types: • Sens Ctrl 1 - Sens Ctrl 2 - The two Sens Ctrl outputs for Sensor Control applications #1 and #2. • Remote Output - A generic remote output type that may be addressed by an application in the CUB’s parent E2 or Einstein. Input Type Generic The sensor control application exists simply to control an output and to generate hi/lo alarms. OAT Choose this option if the input is reading outdoor air temperature.
Min ON Tm Alarm Pri The Minimum ON Time is the amount of time this sensor control output must remain ON after activating before being allowed to turn OFF. Enter the desired time in hours:minutes:seconds format (H:MM:SS). Alarm Priority sets the alarm priority level of the high and low alarms generated for this sensor control application. The priority level is used to filter the alarm and determine how E2 or Einstein will react to and report the alarm.
Oil Fail Setpt Reset Delay If you chose Pressure as the Oil Failure Type, the Oil Failure Setpoint is the pressure that indicates a low oil condition in the compressor. When the oil pressure falls below this setpoint for Oil Failure Delay, a compressor oil failure alarm will be generated. The Reset Delay is the amount of time the CUB will wait between retry attempts. Enter the desired reset delay in hours:minutes:seconds (H:MM:SS) format.
Num Auto Reset The Num Auto Reset field sets the number of attempts the CUB will make to automatically reset the system after a discharge trip shutdown has occurred. After all attempts have been made and the discharge trip is still occurring, the CUB will lock the compressor OFF until the system is manually reset. Enter a number of retries from 0-2. Disch Reset Dly The Reset Delay is the amount of time the CUB will wait in between restarts to try to reset the discharge trip condition.
Enter the desired number of resets in this field. Proof Adv Type The Proof Advisory Type allows you to set the kind of advisory generated when a compressor proof has failed. Choose Alarm if you want to generate an alarm, or Notice if you want to generate a notice. 7.3.10.5. Phase Fail Shutdown If a phase loss detection device is available, the CUB can shut down all systems when a phase loss is detected.
Case Defr Dly Because the case temperature can be considerably higher in a case that is exiting defrost, the Delay After Defrost allows you to prevent high case temp alarms from occurring for a fixed amount of time after the end of a defrost cycle. Enter the desired delay in hours:minutes (H:MM) format. Case Temp Low The Case Temp Low Setpoint is the temperature at which a low case temperature alarm will be generated.
8 The MultiFlex CUB Hand-Held Interface The MultiFlex CUB Hand-Held Terminal (HHT) interface allows you to view status of condensing unit systems and configure setpoints directly on the board. If you are using CUBs separate from a central E2 or Einstein system, the Hand-Held Terminal will be the only programming interface you may use. IMPORTANT! If the CUB boards are connected to a parent E2 or Einstein, do not use the Hand-Held Terminal to make permanent configuration changes.
8.1.4. Input Summary Screen 8.1.8. Refrigeration Control Status Inputs TermTemp: NDF TermDig: OFF SC1 117 SC2 -12 ControlBy: Temp CI/CO SP/DB 55 /45 55 /5 P:32.5 T: 33.5 The Input Summary screen shows the status of the termination temperature sensor and the defrost digital termination input. This screen shows the setpoints and control values for refrigeration control using both the Pressure and the Temperature control strategies.
The Main Menu is actually a series of two menus. Because of the limitation of the size of the screen, menu options #7, 8, and 9 are only available after pressing 6-MORE. use the number keys to enter a value, or if the field requires a selection from a list of options, use the Point key “.” and Dash key “-” to cycle through the options.
8.2.3.2. Refrigerant Select Refrigernt:R401B Case Type : 00 Oil Protect: NO Comp Prf: YES 8.2.3.3. Phase PhaseEnable: NO Door Switch: YES Wash Switch: NO Pumpdwn: Disable Refrigerant Type Phase Enable The Refrigerant field is where the type of refrigerant being used in the condensing unit system must be specified. The E2 or Einstein uses the Refrigerant field to automatically calculate saturation suction temperature.
Temperature Units The TempUnits field determines whether engineering units for temperature will be displayed in degrees Fahrenheit or degrees Celsius. Zone The Zone field allows you to assign this CUB to a zone along with other CUBs in the same motor room for purposes of controlling motor room temperature. 8.2.3.5. Time and Date NetwrkAlarm: NO NetworkTime: YES Time: 15:00:04 Date: 01/04/02 Network Alarm This field specifies whether you want the CUB to set its alarm output if it goes offline.
See Section 8.2.4.4., Comb Method for the start of the HHT screen list for CUB. 8.2.4.1. Condenser Setpoints Condenser SPs Strategy: TD Num Fans: 4 Condenser Setpoints The two fields on this screen show the strategy being used and the number of condenser fans being controlled. Strategy The control strategy is fixed to TD for CUBTD. For CUB using Traditional (Pressure) strategy, refer to Section 8.2.4.6., Condenser SPs.
puts. • MIN - The lowest sensor value of all the case temperature inputs. • MAX - The highest sensor value of all the case temperature inputs. • MIX - A mixture of two inputs, the ratio of which is determined by the Mix % field (see Mix Percentage below). • FIRST - The lowest-numbered input that is not shorted, open, or otherwise invalid, will be used as the case temperature input. 8.2.4.5.
Cut In Press and Cut Out Press Strategy The Cut In setpoint determines the suction pressure that, when exceeded, will cause the compressor to turn ON. In this strategy, the compressor will remain ON until the pressure falls below the Cut Out setpoint, at which point the compressor will turn OFF. Set the type of condenser strategy that will be used to cycle fans ON and OFF. Minimum Suction Pressure 8.2.4.7. The Minimum Suction Pressure setpoint serves two purposes.
Min ON Time Phase Fail Active State The minimum ON time is the smallest amount of time the condenser fan must remain ON after being activated. The Phase Fail Active State tells the CUB what digital state from the phase loss checking device signifies a phase failure. Set this field to CLSD if the phase loss device closes its contacts on a phase failure, or OPEN if it opens contacts.
8.2.5.4. Proof Failure ProofFail Alarm OilFailStpt: 9 OilFailDly: 120S AutoRestarts: 0 Proof Fail The ProofFail field determines whether the E2 or Einstein will generate an alarm or notice when a compressor proof failure occurs. Choose either Alarm or Notice in this field. Oil Failure Run This field determines whether the CUB will continue to attempt to control the compressor as normal even after an oil failure has occurred.
8.2.5.7. High Discharge Alarm HiDischAlrm: 325 Disch Trip: 350 Reset Diff: 100 Reset Delay: 0 M High Discharge Pressure Alarm Enter the discharge pressure level that, when exceeded, will cause a discharge pressure alarm to occur. Discharge Trip Enter the discharge pressure level that, when exceeded, will cause a system shutdown. The Discharge Trip setpoint should be higher than the Discharge Pressure Alarm setpoint.
Wash Fail-Safe Time The Wash Fail-Safe time allows you to suspend Wash mode and resume refrigeration if Wash mode lasts longer than a fixed amount of time. Enter the desired Wash Fail-Safe time in minutes (MM) format. pires (this is the same as no termination). • Min Case Temp - Instead of using a dedicated “Term Temp” sensor, the CUB will use the lowest value among all case temperature sensors as the defrost termination temperature value. 8.2.6.
8.2.6.3. Defrost Times Duration: 45 M MinDefDur: 2 M Drip Time: 2 M NumSchedules: 4 8.2.6.4. Defrost Duration The Defrost Duration is the maximum amount of time a defrost cycle will last. Unless it is prematurely terminated by temperature or suction pressure, a defrost cycle will end when it has been in defrost for an amount of time equal to this field (not including any Pump Down or drip delays). Enter the desired Defrost Duration in minutes.
Name Description Suct Xdcr Suction pressure transducer Disch Xdcr Discharge pressure transducer Oil Xdcr Analog oil pressure transducer Case 1 Temp-Case 6 Temp Case temperature sensors #1 through #6 DrLeg Temp Drop Leg temperature sensor Term Temp Analog termination temperature sensor (NOT digital — use Defrost Term Sensor for digital sensors) Term Dig Digital defrost termination sensor (NOT analog — Use Term Temp for analog termination sensors) Alarm Reset Door Switch Note that when you ch
8.2.8. Outputs Screens Out Out Out Out Out Out Out Out #1 #2 #3 #4 #5 #6 #7 #8 Comp Defrost CondFan1 Remote Remote Remote Remote Alarm The two screens under the heading “Output” are where you assign each of the eight relay outputs to a controlled device in the condensing unit system.
8.2.10.Sensor Control Screens The screens under the Sensors menu option are for setting up sensor control applications. Each of the two sensor control applications have four screens full of fields that must be configured. To program Sensor Control application #2, you must scroll down through the first four Sensor Control #1 screens. Input Type Description Generic The sensor control application exists simply to control an output and to generate hi/lo alarms.
S1 MinOn and S2 MinOn The S1 Minimum ON Time and S2 Minimum ON Time parameters set the amount of time a sensor control output must remain ON after activating before being allowed to turn OFF. Enter the desired time in minutes. 8.2.10.4.
Engineering Units DF Degrees Fahrenheit DC Degrees Celsius PSI Pounds Per Square Inch KPA Kilopascals RH Relative Humidity V Volts FTC Foot Candles LUX Light Level PPM Parts Per Million NDF Not Defined Table 8-6 - Engineering Units Defined Altering CUB Configuration Using The Hand-Held Terminal The MultiFlex CUB Hand-Held Interface • 61
Appendix A: TD Quick Start Set Up Motor Room Temperature and Plenum Temperature Inputs NOTE: This section contains an overview for setting up TD Control for CUB-II or CUBTD. In this section of the manual, the term "CUB" will be used to mean "CUB-II and, if appropriate, CUB-TD." CUB can have up to four motor room temperature zones, which are pre-associated with Global Data spare analog inputs 1-4. The default CUB zone is 1, which associates Motor Room Temp 1 to all CUBs in Zone 1.
Figure A-2 - Global Data Setup Degrees Fahrenheit Figure A-4 - Global Data Setup Spare Analog 5 Mode 5. Arrow down to SpareAnlg5 EU (Engineering Units) and set to DF (Degrees Fahrenheit). Press for Look Up menu ( for Look Up if using an E2). 3. To set the motor room temperature, arrow down to SPARE ANALOG IN and arrow right to set Board to 1 and Point to 1. Figure A-3 - Global Data Setup Board and Point 4. Arrow down to SpareAnlg5 Mode and set to Local Only.
and set Controller, Application, and Output for plenum temp. Figure A-6 - Spare Analog 5 Input Board/Point Configuring Setpoints in E2 or Einstein for CUB-TD The CUB application in E2 and Einstein looks the same for both CUB and CUB-TD versions of the MultiFlex CUB. However, since the CUB-TD’s functionality is limited to condenser control, not all parameters visible in the E2 and Einstein setup screens will apply to the CUBTD.
None, the Input Types to None, and Offsets to 0 (zero). 3. Press to exit screen and save changes, or to return to the Home screen. If using an E2, press to exit and save or to return to the Home screen. Figure A-9 - CUB Outputs General From the MultiFlex CUB Status screen, press and to access General tab options (press from the MultiFlex CUB Status screen if using an E2).
5. To set the DropLeg Offset, arrow down to the Drop Leg Offset field and enter the desired number (the default is 0). DropLeg Offset is a way of adding or subtracting an offset to the drop leg temperature sensor reading (if needed) in order to tune the individual condensing unit. 6. To set the Condenser Fan On Delay, arrow down to the Cond Fan On Dly field and enter the desired number (the default is 30). This setpoint defines the amount of time that must elapse between activation of fan stages.
desired number (the default is NONE). 2. To set the alarm delay setpoint for drop leg temperature, arrow down to Drop Leg Dly field and enter the desired time in hours:minutes (HHH:MM). 3. To set the high alarm setpoint for temperature differential, arrow down to the TD High field and enter the desired number (the default is NONE). 4. To set the alarm delay setpoint for drop leg temperature differential, arrow down to TD Dly field and enter the desired time in hours:minutes (HHH:MM).
Appendix B: Case Type Defaults High Alarm, Low Alarm, and Delay The High Alarm, Low Alarm, and Delay columns are the suggested high and low case temperature alarm setpoints and the report delay. To set up these alarm setpoints and delays, go into the CUB application in E2 or Einstein. The table below lists the 64 default case types that may be used in CUB applications along with the recommended defaults for each case type.
Defrost Type Type Abbr.
