Home

026-1722 MultiFlex PAK User`s Guide

1. When the HHT is plugged into the MultiFlex board the HHT display will show the model type of the MultiFlex PAK the CPC part num ber and the firmware revision DIP Settings Address 1 Baud 9600 Pressing the DOWN ARROW key from the start screen displays the address and baud rate settings as read from the MultiFlex s addressing and baud rate DIP switches From the DIP Settings screen pressing the DOWN ARROW key again will select the first PAK status screen You will not be able to view the start screen or the DIP Settings screen again without disconnecting and reconnecting the HHT 8 3 PAK Status Screens The eleven PAK Status Screens show the current readings of all PAK inputs the states of all outputs and proofs and other operating infor mation By default the HHT automatically scrolls through the screens in sequence every 3 seconds To freeze the display on the current screen press the POINT button on the HHT In this mode you can use the UP ARROW and DOWN ARROW keys to scroll through the status screens PAK Start Screens 8 3 1 Status Screen 1 Pressure Chold Suction 34 0 99 4 Discharge Amb 1 Temp 17 7 Suction The current value of the suction pres sure input Discharge The current value of the discharge pressure input Amb 1 Temp The current value of ambient temperature sensor 1 8 3 2 Status Screen 2 Comp Disch Temps 1 1 to 8 4 21 50 45 45 OPE OPE
2. Output Type Comp Grp1 8 ompressor Group output 1 8 Fan Stage 1 4 Fan Stage output 1 4 Liq Inject Condenser Liquid Injection valve Cond Spray Condenser Spray valve Alarm Compressor discharge temper ature sensors for compressors 1 through 8 VSD Fan En Run input for an inverter oper able ating the variable speed fan s VSD Bypass Bypass input for an inverter op erating the variable speed fan s VSD Reset Reset input for an inverter oper ating the variable speed fan s VSD Analog Fan speed input for an inverter operating the variable speed fan s Fan Seq Variable voltage output driving a fan sequencer Table 4 7 MultiFlex PAK Output Types 4 3 2 The PAK Default Analog Dig ital Output Assignments VSD Each output is rated up to 10 milliamps These outputs are fixed to drive solid state relays for activation deactiviation of condenser fan stages For use as digital outputs the MultiFlex PAK may be configured in the software to define 0 8V as ON OFF or as OFF ON The PAK has no hardware based fail safe settings fail safes are set up in the board firm ware All that is required is to connect the terminal to the positive wire on the device and the terminal to the negative or ground wire of the device MULTIFLEX BOARD OUTPUT LAYER DIGITAL POINTS NEGATIVE POSITIVE Figure 4 4 MultiFlex Digital Points Analog Digital Definition Output Fan Stage 1
3. Fan Stage 2 Liquid Inject Table 4 8 MultiFlex PAK Default Outputs The MultiFlex PAK board has four outputs that may act as either digital outputs that pulse a 8VDC signal or as analog outputs that use a variable voltage to drive a fan sequencer or 14 MultiFlex I O Board Operator s Guide 026 1722 Rev 4 03 JUN 2010 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 FFI co CODE A and CODE B LEDs Code A Tx and Rx LEDs a Rx j F co Co co S4 n Figure 5 1 MultiFlex Status LED Locations 5 1 Status LED The Status LED simply 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 Txand Rx LEDs The Tx and Rx LEDs indicate when the Mul tiFlex is sending or receiving messages on the RS485 network The Tx LED blinks once every time the Mul tiFlex sends a response to the E2 or REFLECS The Rx LED blinks once when the MultiFlex receives a message Status LED Code B STATUS LEDs If the MultiFlex is connected to the network and set up to communicate with the controller you should see these lights blinking regularly If they do not there may be a problem with the
4. SCP OLS Ee ALES Ee NM iE Ba ait desan tn ly E Kan xw n Mende E AE Lid E a aan 26 73 2 gt GOMPVESSOF CLOUDS cps eiecieed ARR Ras bb g Prr 2uouMm 27 LI COMPE SLALUS 2523 25 Losses ee Metsu dues LULU padi aiii ada 27 LISAS CORA CAS cs LOL DD ROR E Se 27 TAS ASIN CONNCCIED UNG PAK States a Pecado coe tee das MN Lo a tad aside a Geen tate Mate 28 7 4 PROGRAMMING THE PAR USING E2 i scci cacccatesenieitasest ceiceneses vette stots wa eda kewan AAAA E EAEN A EEEE ERER 28 LALA CCA A Za ANI EE Bato cece oleh vie DD coast tals EE Aia 28 74 2 SCREEN Ds COMP SCLDIS sects A A 3 le h eyna li ri 28 kA 3 Screen N2 MM A A ena i A E A ta odes tient ts 29 TAA Sereen A kloat Setup A A a O LA lid 29 LADO CCOO IA ALA PUES N DD N e MH HRH HHHHHHHHHHH HRH HRH HHHH DH 29 TAO Sereen 6 OULPUIS sacs Seve eee gt exw jr 30 VAY AZ TP AB OUIPULS 1 DM el Nts A iS A A nn had Aisa a Adve Mies seb Silane AE olan weasels 30 148 Sereen 8s AAC EOS A A a ti 30 LD SCENE AV A A DD A a E E o A N 31 ZAAO SEPCONAD XA N S ELLA OR Ma LS Te A O AIS O A A A 31 8 MULTIFLEX PAK HAND HELD TERMINAL INTERFACE s srsererseeeeseseeeeeeseree keneke eee e ek k n r HK HK HHHH HHHH WAR 32 Sl TBEHATINTERRACE 50022 2505500002 ete E AE R EAE EAE sce shecedesecs ideada 32 vi e MultiFlex I O Board I amp O Manual 026 1722 Rev 4 03 JUN 2010 SLT Navitimer ia a EAE E Weasels love leds A A A iin meet elias 8 2 PAK STA
5. at least 22 GA wire Belden 8771 or equivalent Dew Point and Light Level Sensors These sensors are to be wired with shielded 4 conductor at least 22 GA wire Belden 8729 or equivalent 4 1 3 3 Each MultiFlex input point has an input type dip switch that must be set Input type dip switches are located in the switch banks labeled S1 and S2 Input Type Dip Switches 026 1722 Rev 4 03 JUN 2010 The input type dip switch tells the input board whether or not the sensor connected to the point is a resistive type sensor Generally if the sensor or transducer supplies its own voltage signal to the point the dip switch should be set to the LEFT OFF position If the sensor uses variable resistance and requires voltage to be supplied to it from the input point set the dip switch to the RIGHT ON position Dip switches for unused points should be set to the RIGHT ON position The exception to this rule is for CPC s 5VDC pressure transducers though they supply their own voltage signal the dip switch MUST be set to the RIGHT ON position 4 1 4 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 2 for the location of these points Figure 4 2 Input Board Power Sources 4 1 4 1 Current Ratings for On Board Power
6. ber of retries if the compressor is still failed the PAK will not try any further resets until the start of the next hour 026 1722 Rev 4 03 JUN 2010 If a compressor group fails three consecutive restart attempts a Proof Fail alarm will be gener ated Screen 3 Comp HP or Amps 1 1 to 8 4 6 6 6 6 6 6 6 6 The third and fourth lines of this screen con tain the eight fields that specify the HP or amperage rating of compressors 1 through 8 Line three contains the fields for 1 through 4 left to right and line four contains the fields for 5 through 8 left to right You may enter either the compressor rating in HP or in amps provided all compressors con trolled by this PAK use the same unit in other words enter all compressors either as HP or as amps Screen 4 Comp HP or Amps 9 9 to 16 12 6 6 0 0 0 0 0 0 Screen 4 is the same as screen 3 except the compressor rating fields on this screen are for compressors 9 through 16 Screen 5 Comp Output Grps 1 1 to 8 4 0 0 0 0 0 0 0 The third and fourth lines of this screen con tain the eight fields that specify the compressor group assignment for compressors 1 through 8 Line three contains the fields for 1 through 4 left to right and line four contains the fields for 5 through 8 left to right For each compressor specify a compressor group assignment from 1 8 PAK Configuration Screens Screen 6 Comp Output G
7. controllers Danfoss EKC514 SNMP case controllers e WCC case controller Microm Tektronix Barker Elm CDK e Danfoss DFMC Micro Cool case controllers 20 MultiFlex I O Board Operator s Guide Each case temperature input value used in the combination is determined by taking the average value of the input over a time window called the averaging window which averages all sampled temperatures between the current time and x minutes before the current time where x is the user defined averaging window time period Once the averages of each input are determined these values are then combined into a single temperature by calculating either the average value the median value or the maxi mum value The result called the float temper ature is compared to the float setpoint to determine which direction to float the suction pressure setpoint 6 1 5 2 Defrost Inhibit All case temperatures used as inputs for Suc tion Float are only used in the combined case temp calculation if they are in refrigeration mode If a case is not in refrigeration mode its temperature input value will be ignored This includes cases in defrost pump down drip or drain mode clean or wash mode and cases whose case control devices are offline or otherwise shut down If a case that is being inhibited returns to refrigeration mode the E2 will wait for a user defined delay period to elapse before including its temperature value in the com
8. enclosed by brackets is the suction pressure control set point displayed here for reference purposes TD The TD field shows the current calculated value of the temperature differential between the discharge temperature and the ambient tempera ture The value shown in smaller type to the right of the TD field enclosed by brackets is the TD set point displayed here for reference pur poses Suction Temp This field shows the value of the PAK s suc tion return gas temperature input Liquid Level This field shows the value of the PAK s liq uid level input Comp Amps This field shows the value of the PAK s Compressor Amps input Cond Temp This field shows the condenser discharge temperature calculated by converting the dis charge pressure to temperature based on the sys tem refrigerant Amb Temp 1 The Amb Temp 1 field shows the current value of the ambient temperature sensor on the condenser Disch This field shows the current value of the dis charge pressure transducer Cond Amps This field shows the current value of the PAK s Condenser Amps input 026 1722 Rev 4 03 JUN 2010 7 3 2 Compressor Groups The box left of the middle of the PAK Status Screen shows the current status of the compres sor groups defined for the PAK Compressor Group HP AMPS and Status Each group from 1 through 8 has a field showing HP AMPS which displays the total amount of HP or AMPS of all com
9. o Select CX Tabs SETUP Controller Application Input DISCH TEMP 2 DISCH TEMP 3 DISCH TEMP 4 DISCH TEMP 5 DISCH TEMP 6 DISCH TEMP 7 3 DISCH TEMP 8 DISCHARGE PRESS SUCTION PRESS SUC GAS TEMP COND AMPS COMP AMPS LIQUID LEVEL CUR SUC PRES SP Enter Board Controller DISCH TEMP 1 F1 PREU TAB F2 NEXT TAB F3 EDIT A F4 LOOK UP CANCEL Figure 7 8 Screen 6 Outputs The Outputs screen of the E2 PAK applica tion provides output definitions that may be used to connect PAK outputs to inputs of other appli cations for use in extended I O control No user programming is required in this screen when programming the PAK 7 4 7 Screen 7 PAK Outputs RX 366 Unit 1 SETUP C9 Safet CO MORE MultiFlex PAK PAKO61 Value Compressor Grp 2 Compressor Grp 3 Compressor Grp 4 Compressor Grp 5 Compressor Grp 6 Compressor Grp 7 Compressor Grp 8 Fan Stage 1 Act Level OFF Analog Type2 Fan Stage 2 Act Level OFF Analog Type3 Liquid Injection Act Level OFF Analog Type Condenser Spray Act Level OFF Scroll using Next Prev keys Output Type F1 PREU TAB F2 NEXT TAB F3 EDIT __F4 LOOK UP__ FS CANCEL Figure 7 9 PAK Screen 7 PAK Outputs The PAK Outputs screen is where you must assign the functions of each of the eight relay outputs and four analog digital outputs on the MultiFlex PAK 30 MultiFlex I O Board Operator s Guide 7 4 8 Sc
10. the setpoints required are Compressor Groups Suction Setpoint The suction pressure you wish to maintain Suction Deadband A small range of values equally above and below the Suction Setpoint within which the suction pressure will be consid ered to be acceptably near the Suction Setpoint and no stage activation or deactivation will occur Step ON and OFF delay times The Step ON delay time is observed immediately after the PAK adds compressor capacity either by cycling ON a larger number of compressors or by incrementing up one step in the Fixed Step strategy If after bringing ON more compressors the suction pressure is still above the top part of the Suction Deadband it must wait an amount of time equal to the Step ON delay before consider ing a Suction Outer Deadband A larger range of values equally above and below the Suction Set point larger than the Suction Deadband The Suction Outer Deadband seeks to prevent an unnecessary activation or deactivation of com pressor group stages in instances where the suc tion pressure is just barely outside of the Suction Deadband and already moving back toward the setpoint When the suction pressure lies somewhere between the inner and outer deadband it ana lyzes the direction and rate of change of the suc tion pressure over the last 1 2 of the Step ON or Step OFF delay depending on the direction If the calculated slope of the suction pressure dur ing the last 1 2 o
11. 1 The PAK Configuration Menu 1 Gen 3 Outs 2 CompSP 4 CondSP 6 Safety 5 Input Select 1 Press F1 at any time to access the PAK Con figuration Menu To select one of the six sub menus press the RIGHT ARROW key enter the number of the sub menu you wish to access then press DOWN ARROW key twice to access the sub menu s first screen General General info about the system the PAK will control such as number of compressors and condenser fans the control strategy and more CompSP Setpoints that determine the operation of the compressor pack Outs Where you select the output type for the re lays and analog digital outputs on the MultiFlex PAK CondSP Setpoints that determine the operation of the condenser Input Where you select the input type for the six teen inputs on the MultiFlex PAK Safety Setpoints that determine the operating con ditions for safety shutdowns 8 4 1 1 Screen 1 1 General PAK Name PAKOO1 Flash 2 Name Enter a name for the PAK in this field Use the LEFT ARROW and RIGHT ARROW key to move the cursor across the name field Use the UP ARROW and DOWN ARROW to scroll through the list of alphanumeric characters for each letter or number in the name field When finished press the DOWN ARROW key Flash This read only field shows the number of times the flash memory has been rewritten PAK Configuration Screens Screen 2 Control Strategy Comp Cyc
12. Comp InterlockEn YES YES CompProofEn 4750 Ohms Cond and Comp Interlock Enable When this parameter is set to YES the PAK will cycle OFF condenser fans when no compressors are ON and the discharge pressure is below the Interlock setpoint When this parameter is set to NO the Interlock feature is disabled and condenser fans will be operated separately from compressor groups Comp Proof Enable If you are using compres sor proofing set this field to YES Compressor proofs for the PAK are not separate inputs they are resistive loads applied in parallel with the Discharge Temp sensors for each compressor group The PAK interprets changes in the input s resistance as proof contact closures or openings 8 4 1 2 2 Comp SP Screen 1 SuctPresSP 45 0 OutDB 8 DB 4 30 S 20 S SuctPresSP The Suction Pressure Setpoint is the suction pressure the PAK will attempt to maintain during compressor pack control disre garding suction setpoint floating OutDB The Outer Deadband is the range of pressure values equally above and below the Suction Pressure Setpoint but wider than the Suction Deadband or DB within which the PAK will cancel a compressor group stage change if the suction pressure is detected as StepON Dly OFF Dly 38 MultiFlex I O Board Operator s Guide returning to within the Suction Deadband See Section 6 1 3 Compressor Group Stage Activa tion and Deactivation for a complete description of
13. EN 7 Bedi A cc rr cr 7 DLL NANO Numbers nA ka AT he kenya A e A a a TA uaa ATA DANANA AA 7 3 2 1 1 Numbering the MultiFlex PAR isc iaa ee ha a a dela diel di EREN E HILA d 7 3 2 2 Vetting the BAUG Rate 225 nea Aran da A A kaz G Z benan lal wez ay akan Akay AAA S kan daka 8 3 2 3 Setting the Terminating Resistance Jumpers U LC L L L L L L uue ayak eka nana a yaka ek eyek keka kek 8 4 VO BOARD INPUT AND OUTPUT SET U P erereereeeeeeeeeeeenee ee eee Heee ken He HeH He HHHH HH KAK KHAN KHK HKH HHH KHK HKH HHHH ono nss 9 BL THE Esl JUN Sc gd 2 4 1 1 Input Types Supported by the MultiFlex PAK uLL seya saxe exe yekeke yaaa yeye yeee eee Y 4 1 2 The PAK Default Input A4SSignmenis Lusa sael kaea keka ya ke kaya kake e kak eyek kek eka ke 10 4 1 3 Connecting Sensors to Input BOqrds LL L L L L L L L Lusa ayak ea kaka nana rr 10 42132 D WATS ANA K Yan Ye en e etn ee Ye DY en eet eh a ere ee 413 2 Sensor Wiring Types ii ii 4 1 3 3 Input Type Dip Switches ALA Power COMMENTS 4 1 4 1 Current Ratings for On Board Power Sources cscsecesesssscesescescseeeceseseescseeeceecseeecsecaeeceesacsessesscsaeaesseneeacaesaseecsesaseeenees 4 1 4 2 Powering Sensors Requiring 24VAC Off the Power Transformer 4 1 5 Sensor Types for MultiFlex Input Points cccccccsccssseseesceseeecusenseseeseecesseseesecaceseeseesesesseee
14. Liq Level I O Board Input and Output Setup 9 4 1 2 The PAK Default Input Assignments DischTemp 6 Table 4 2 MultiFlex PAK Default Inputs 7 10 11 12 E 14 15 6 4 1 3 Connecting Sensors to Input Boards Wiring a sensor to the input points on a Mul tiFlex board requires three steps 1 Connect the sensor s signal wires to the two terminals of an input point 2 Set the input type dip switch that corre sponds to the point being connected 3 Ifnecessary connect the sensor to one of the 5V or 12V power terminals 10 MultiFlex I O Board Operator s Guide 4 1 3 1 An input point on a MultiFlex board consists of two terminals as shown in Figure 4 1 One of these terminals labeled SIG reads the signal from the sensor while the other labeled Ov is where the sensor s ground and or cable shield wire is connected Wiring MULTIFLEX INPUT POINTS Ov SIG INPUT 1 Figure 4 1 Input Board Points 4 1 3 2 Specific wiring types are required for each type of sensor used with E2 or RMCC Sensor Wiring Types All Analog Temperature Sensors and Air Flow Sen sors Temperature and air flow sensors are to be wired with shielded 2 conductor at least 22 GA wire Belden 8761 or equivalent All Pressure Transducers Humidity Sensors and Re frigeration Transducers Pressure and refrigeration transducers and humidity sensors are to be wired with shielded 3 conductor
15. Sequencer output The All Off field shown in this screen is read only and is fixed at OV This signifies 0V will be the Fan Sequencer output voltage when all fans are called to be OFF The Ist On field shown in this screen is also read only and is equal to the value of Fan MinON Volts in Screen 6 The voltage shown in this field will be the Fan Sequencer output volt age when stage is called to be ON After the first fan stage is ON the PAK will increase the voltage of the Fan Sequencer output by a fixed amount every time a new fan stage is to be activated Enter the fixed voltage in the Step Volts field 026 1722 Rev 4 03 JUN 2010 Screen 10 Fan HP or Amps 1 1 to 8 4 4 4 4 4 0 0 0 0 The third and fourth lines of this screen con tain the eight fields that specify the HP or amperage rating of condenser fans 1 through 8 Line three contains the fields for 1 through 4 left to right and line four contains the fields for 5 through 8 left to right You may enter either the fan motor rating in HP or in amps provided all fans controlled by this PAK use the same unit in other words enter all condenser fan motor ratings either as HP or as amps Screen 11 Fan Output Grps 1 1 to 8 4 1 1 2 2 0 0 0 0 The third and fourth lines of this screen con tain the eight fields that specify the condenser fan group assignment for fans 1 through 8 Line three contains the fields for 1 through 4 left to ri
16. Sources The maximum current that may be drawn from the 12VDC terminal is 100 milliamps The maximum current that can be drawn from all three 5 VDC terminals COMBINED is 50 milliamps The Inputs 4 1 4 2 Powering Sensors Requiring 24VAC Off the Power Trans former Some sensors that requires 24VAC can be powered off the MultiFlex s own 24VAC power connection To connect to the 24VAC power source connect the sensor s power wires to ter minals AC1 and AC2 This can only be done with sensors that keep the 24VAC signal isolated from its DC output signal such as CPC s Dew Point Probe If the output signal is not isolated from the 24VAC input you must use a separate transformer 4 1 5 Sensor Types for MultiFlex Input Points Because different controllers may be com patible with different sensor types this manual cannot list all sensor types and how to wire them to a MultiFlex input point Refer to your site controller s documentation for sensor wiring information 1 O Board Input and Output Setup 11 4 2 The Relay Outputs 4 2 1 Output Types Supported by the MultiFlex PAK Output Type Comp Grp1 8 Compressor Group output 1 8 Fan Stage 1 4 Fan Stage output 1 4 Liq Inject Condenser Liquid Injection valve Cond Spray Condenser Spray valve Alarm Compressor discharge temper ature sensors for compressors 1 through 8 VSD Fan En Run input for an inverter oper able ating the variable speed fan
17. a 600V shielded 22AWG equivalent stocked by CPC P N 135 0600 These are two connector shielded twisted pair cable that support a maxi mum daisy chain cable distance of 4000 feet 1219 m between the E2 and the end device on the network Provided the cable can be routed away from noise generators and avoid running in parallel with high voltage wire any of the three speci fied cables will provide adequate shielding from external noise For more instructions on best practices for minimizing noise refer to publica tion 026 1903 E2 Controller Wiring Practices available in the Product Manuals section of the Emerson Retail Solutions website http www emersonretailsolutions com library 3 2 Daisy Chains The RS485 Input Output 1 0 network is wired in a daisy chain configuration In a daisy chain boards are wired together in series with no branches or star configurations and the net work is terminated at either end of the daisy chain Wiring Types A diagram of this network arrangement is shown in Figure 3 1 CPC ul INS INPUT OR OUTPUT BOARD TERMINATION TERMINATION Figure 3 1 I O Network Configurations 3 2 1 Network ID Numbers Each device on an RS485 segment has a net work dip switch that must be used to assign the board a unique network ID number The network ID number makes a board unique from other boards on the network of the same type This
18. allows the site controller to find it and communicate with it Boards of the same type should be numbered in sequence starting with one and continuing with two three etc 3 2 1 1 Numbering the MultiFlex PAK The network ID on the MultiFlex PAK is set using the first five dip switches on dip switch bank S3 Refer to Figure 3 2 for dip switch set ting instructions The I O Network 7 NOTE The MultiFlex PAK may only be numbered up to 16 since E2 will only speak to a maximum of 16 PAK boards A PAK num bered above 16 will be ignored 16AI POSITION 1 5 NETWORK ADDRESS 1 31 POSITION 6 7 BAUD RATE 9600 or 19200 i 19200 BAUD 9600 BAUD Figure 3 2 16 Network ID and Baud Rate Switches 3 2 2 Setting the Baud Rate All I O boards have dip switches that deter mine the baud rate at which they communicate Currently the baud rate dip switch in network components may be set at either 9600 or 19200 baud Either may be used refer to your site controller s user manual for the baud rate recom mendation currently 9600 baud for both REFLECS and E2 controllers On all MultiFlex boards switches 6 and 7 on S3 are used to set the baud rate To communic
19. have its 0V ter minal taken to a short solid earth ground Power Wiring Types 14 AWG Belden 9495 or equivalent 18 AWG Belden 9493 or equivalent Table 2 3 Power Wiring Types The wire length from the transformer and the number of boards connected to the same wire determines the type wire gauge used In most cases the distance between the I O boards and 6 MultiFlex I O Board Operator s Guide the transformer that supplies power to them is not enough to be concerned with But it is very important not exceed this maximum wire length or the boards will malfunction Use these formulas to determine if the wire gauge you are using fits within specification 14 AWG Feet 0 40 VA 24 x 0 005 18 AWG Feet 0 40 VA 24 x 0 013 VA is the total VA rating of the I O boards For example if you had an 80 VA load 14 AWG 24 ft rounded down 18 AWG 9 ft Figure 2 7 Power Wire Lengths 026 1722 Rev 4 03 JUN 2010 3 The I O Network All MultiFlex PAK boards and controllers use an RS485 network connection to communi cate with E2 site controllers Technicians who are familiar with CPC s previous generation 16AI 810 and ARTC boards will find the net work setup procedure for the MultiFlex boards to be very much the same 3 1 Wiring Types CPC specifies all RS485 I O and MODBUS wiring used by the E2 must be Belden 8641 24AWG 300V CPC P N 135 8641 Belden 8761 22 AWG 300V not stocked by CPC or
20. next fan stage MultiFlex PAK E2 Interface 27 ON Delay The PAK is calling for fan stages to activate and PAK is waiting for the ON Delay time period to elapse before activating the next fan stage e DeadBand The discharge pressure is within the setpoint deadband and therefore the PAK is neither activating nor deactivating any fan stages Max Cap All condenser fans are ON but the discharge pressure is still above set point In other words PAK would activate more fan stages if more were available but it is oper ating at maximum capacity e Cond Spray The condenser spray output is currently ON meaning the discharge pres sure is currently higher than the condenser spray set point 7 3 5 Connected and PAK State At the very bottom of the PAK Status Screen the Connected field shows the state of the PAK application s Connected parameter thus show ing whether the PAK has been enabled for com munication Connected means the Connected parameter is set to Yes Not Connected means the parameter is set to No The PAK State field shows whether the MultiFlex PAK is currently reading as Online or Offline Note that a status of Connected in the Con nected field does not necessarily mean the PAK is communicating with the E2 if the PAK State reads Offline 7 4 Programming the PAK using E2 To begin programming a PAK navigate to the PAK Status Screen for the board you wish to program see Se
21. no override Overriding A1 through A4 will set the output to the DC voltage that corresponds to the selected digital state This is determined by the ActiveLevel setting for the output set in Screens 3 and 4 under the Outs menu In other words if the ActiveLevel of the output is OFF and you override the output to ON the voltage will be OVDC while in override All overrides initiated with the HHT are can celled when the HHT is unplugged from the MultiFlex PAK Screen 7 Analog Fan Ovrd Ovrd NO Ovrd Volts 10 Screen 7 is used to override the variable speed condenser fan output To initiate an over ride set the Ovrd field to YES and specify the desired output voltage in the Ovrd Volts field To cancel an override set the Ovrd field to NO This override is also cancelled when the HHT is unplugged from the MultiFlex PAK 026 1722 Rev 4 03 JUN 2010 8 4 1 4 Screen 1 4 CondSP Cond TD SP DeadBand Fan ON Dly 15 FanOFF Dly 45 Cond TD STPT and Cond TD DeadBd The Cond TD Setpoint is the difference between the condenser discharge temperature and ambient air temperature the PAK will attempt to maintain When the condenser TD is higher than this set point the PAK will activate fan groups When lower than the setpoint the PAK will deactivate fan groups The Cond TD Deadband is the range of dif ferential values around the Cond TD Setpoint within which the setpoint is considered sati
22. s VSD Bypass Bypass input for an inverter op erating the variable speed fan s VSD Reset Reset input for an inverter oper ating the variable speed fan s Table 4 3 MultiFlex PAK Output Types 4 2 2 The PAK Default Output Assignments Table 4 4 MultiFlex PAK Default Outputs 4 2 3 Wiring The MultiFlex PAK boards have Form C relay contacts Figure 4 3 shows how to wire the three terminal Form C contact 12 MultiFlex I O Board Operator s Guide One wire of the two wire connection should always be connected to the middle terminal The second wire must either be connected to the N C terminal if you want the path to be closed when the relay is de energized or the N O terminal if you want the path to be open during power fail ure The contacts you choose also affect what the board s fail safe dip switch will need to be set to for proper operation Refer to Table 4 5 and Table 4 6 on page 13 RELAY IS OPEN ON POWER FAILURE RELAY IS CLOSED ON POWER FAILURE Figure 4 3 Form C Contact Wiring 4 2 4 Output Fail Safe Dip Switch es When a controller calls for a MultiFlex relay output to be ON it sends a command to the Mul tiFlex to turn the output to the ON state signi fied by the output LED being ON The behavior of the relay when it is ON is determined by the position of the fail safe switch The fail safe switches for the outputs are on a switch bank at the bottom right corner t
23. terminal in the upper right corner of the circuit board see Figure 2 4 for reference New Style MultiFlex Board Top Left Corner NO POWER LED Old Style MultiFlex Board Top Left Corner Figure 2 4 New Style vs Old Style MultiFlex Board If there is a power LED next to the connec tor your MultiFlex is a new style MultiFlex refer to Section 2 3 2 1 New Style MultiFlex Combination I O Boards with Isolated Power Supply for power wiring instructions If there is no power LED next to the connec tor your MultiFlex is an old style MultiFlex refer to Section 2 3 2 2 Old Style MultiFlex Combination I O Boards No Isolated Power Supply for power wiring instructions 2 3 2 1 New Style MultiFlex Combina tion I O Boards with Isolated Power Supply The new style MultiFlex board can be con nected to any of the center tapped transformers mentioned in Table 2 2 provided the 0V termi nal of the board is connected to an Earth ground 026 1722 Rev 4 03 JUN 2010 A center tapped transformer may power both center tapped and non center tapped boards at the same time as long as none of the non center tapped MultiFlex boards are old style MultiFlex boards If an old style MultiFlex shares the same center tapped transformer as a device that uses the center tap boards on the net work will be damaged Figure 2 5 shows how to wire a non center tapped device to a center tapped
24. the Discharge Trip setpoint is 340 PSI and the Reset Diff is set to 50 a safety shutdown will be reset when the discharge pressure falls below 290 PSI 340 50 44 MultiFlex I O Board Operator s Guide An automatic reset will only occur if the PAK has been in safety shutdown for an amount of time equal to the Reset Delay Reset Delay The Reset Delay is the minimum amount of time the PAK will remain in safety shutdown after a discharge trip has occurred After the Reset Delay has elapsed if the dis charge pressure lowers to below the Discharge Trip Setpoint minus the Reset Diff the safety shutdown will be reset and the PAK will resume normal control Resets PH The Resets Per Hour field specifies the maximum number of automatic resets of a safety shutdown that will be allowed within a one hour period If a safety shutdown occurs and the PAK has already auto reset a number of times equal to this parameter in the past hour the PAK will not attempt another auto reset and will remain in safety shutdown for the remainder of the one hour period or until the user manually resets the PAK see Screen under the Safety sub menu 026 1722 Rev 4 03 JUN 2010
25. the value will be NDF Cond Amps The value of the current transducer measuring amperage used by the condenser fans If unused the value will be NDF Liq Level The current value of the liquid level probe or NDF if unused If the liquid level sensor is digital the value will read OK or NotOK 8 3 8 Status Screen 8 QuietMode En OFF Cond Spray OFF Liqid Inject ON Alarm OFF QuietMode EN If Quiet Mode is currently enabled the status will read ON If Quiet Mode is disabled or not being used the status will read OFF Cond Spray The state of the Condenser Spray output Liquid Inject The state of the Liquid Inject out put Alarm If an output is set up as type Alarm this shows the state of that output which is ON whenever an alarm is active on the PAK and OFF when no alarms are active If no output is set up the value shown here will still be ON or OFF depending on whether or not alarms are active PAK Status Screens 8 3 9 Status Screen 9 12345678 lt Fans 0000 1234567 lt Comps gt 16 000 00 0000000 This screen shows the current state of indi vidual condenser fans 1 through 8 and com pressors 1 through 16 NOT THE GROUPS When a fan or compressor group is active the fans or compressors that are associated with that group will be shown here as When inactive or not used the fans or compressors will be shown as 0 8 3 10 Status Screen 10 Comp Proof Stats
26. 026 1722 Rev 03 JUN 20 MultiFlex PAK Compressor Condenser Control Board User s Guide y O 2 CLL ol LLL COMPUTER PROCESS CONTROLS bka Q Q CEE LLL COMPUTER PROCESS CONTROLS 3240 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 Com puter Process Controls Inc assumes no responsibility for any inaccuracies that may be contained herein In no event will Computer Process Controls Inc be liable for any direct indirect special incidental or consequential damages resulting from any defect or omission in this manual even if advised of the possibility of such damages In the interest of continued product development Computer Process Controls Inc reserves the right to make improvements to this manual and the products described herein at any time without notice or obligation READ ALL INSTRUCTIONS CAREFULLY If the equipment is not used in the manner specified by the manufacturer the protection provided by the equipment may be impaired SAVE THIS INSTRUCTION MANUAL This instruction manual contains important operating instructions for the MultiFlex PAK boards Table of Contents 1 OVERVIEW OF THE MULTIFLEX PRODUCT LINE y e erereereeeeeseseseeeekerexeee ne e ene keke He HeNeH HK HK HHHH HEHE HAKK KHE 1 We MULTIFLE
27. 12345678 lt Groups 00000000 lt Fail 00000000 lt Alarm This screen shows the proof failure status and alarm status of each of the eight compressor groups Line three of the display shows failures line four shows alarms If a proof failure or alarm is active for a compressor group the dis play will show in the column under the com pressor s group number Otherwise the display will show 0 8 3 11 Status Screen 11 CModes Comp OFF ON Delay OFF Comp The Compressor Group Mode field explains the current state of the control algo rithm in the MultiFlex PAK There are seven messages that may appear here Cond Suct Float e OFF No compressor groups are ON and none are being called to be ON Off Delay The MultiFlex PAK requires less compressor HP AMPS but PAK is currently waiting for the Step OFF delay to elapse before decreasing capacity MultiFlex PAK Hand Held Terminal Interface 35 On Delay The MultiFlex PAK requires more compressor HP AMPS but PAK is cur rently waiting for the Step ON delay to elapse before increasing capacity e DeadBand The suction pressure is within the Suction Deadband The PAK will con tinue operating at the current capacity Max Cap Based on the current value of the suction pressure the PAK would activate more HP AMPS if more were available but it is operating at maximum capacity e XDucer Fail The suction pressure trans ducer input has fa
28. 208 240 VAC Yes 640 0050 75 VA 110 VAC No 640 0045 75 VA 220 VAC No 640 0080 80 VA Multi tap 120 208 240 VAC Yes Table 2 1 Transformers Compatible with MultiFlex Board The Plug In Output Board Mounting and Powering 3 2 3 1 Choosing Transformer Sizes In most site installations a single trans former 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 board products Refer to your site controller s manual for VA ratings of the other I O boards that may be powered by one of these transform VA VAC Center tapped and RCB MultiFlex 88 88A0 168 168A0 and Table 2 2 Device Power Requirements 2 3 2 MultiFlex Combination Input Output Board Power Wiring The MultiFlex PAK boards do not use a cen ter tap Instead the 0V terminal on the board should be connected to a separate Earth ground Important The rules that must be fol lowed when connecting a MultiFlex PAK board to a transformer are different depend ing on whether you have a new style Multi Flex board with an isolated power supply all MultiFlex boards shipped after November 1 2002 or an old style MultiFlex board all MultiFlex boards shipped before November 1 2002 4 MultiFlex I O Board Operator s Guide A new style MultiFlex PAK board has a green power LED located next to the 24VAC connection
29. 5x5 lt 5 lt cs bine s v e e sea k s h heu e k b za 6 0 yee k s oC es V eieren ne d e es s V ev es n 17 6 1 COMPRESSOR GROUPS 04 5 4 0 ky n isis kek a k W K R eka Kek riera 17 OLLE Maximum H Of Groups his n Wis secs c sil A a A a bd 17 0 1 2 Reguired SetPoint aint reai Seth tater day duced ata a ra Ga it ia ll 17 6 1 3 Compressor Group Stage Activation and Deqctivation u LL L LuE u uca aleke kake keke 17 6 1 4 Compressor Control Strategies L ula aaay ease nan keya yekayek yekeya keke manana nan 18 OT Als Cycle adds 18 61 42 D S E O RR RON 18 OLI Suction ALA A tt 19 6 1 5 1 Suction Float Input SourceS y s xa kus n da ke W kesek p ye i kek e a Hale wek deb H ae d n n N K RA K wak rc E ee Se n k Je da ee Kenan w ne en 20 6 1 5 2 Defrost Inhibit his Z 6 1 5 3 Bad Case T mp InliiDiL acond kr key ye added s KE Ve Wak ce xebe d e E aa say n y dani dd 4 a H e b oa ek k en 20 6 1 5 4 Suction Float During Loss of Communication eee eke kek ke kek keke kek kake kewka nana KAK nan mane KAK KAKA 21 62 CONDENSER CONTROL cartilla Kaf A DS N leds qa ANOA TAA 21 6 21 Condenser Control Strategies aa b l yan a kak aba deeds a aaa kovika anaes evade 21 G Q Le Staged Be DP a Haa NNxN__N_N_MNMRMRdmd HHHH KHER HHHH vn 21 6 2 1 2
30. AK requires more or less horsepower to maintain set point Fixed Steps When the PAK requires activation of more compressor capacity the PAK activates the next highest numbered combination or step When the PAK requires deactivation of compressors the PAK goes to the next lowest numbered step The Step ON and Step OFF delay is observed between each transition to prevent rapid cycling The maximum number of steps that may be configured is 20 Example of Fixed steps Table 6 1 shows an example of a fixed step strategy for a pack of 13 equally sized compres sors The compressors are split into five groups one for each relay on the MultiFlex PAK Then for each of the 14 total steps in the strat egy each step is configured to bring on a differ ent combination of groups resulting in the total number of compressors increasing or decreasing by 1 every time a step is incremented or decre 026 1722 Rev 4 03 JUN 2010 mented Note that this is not necessarily a rec ommendation for setting up all packs using a MultiFlex PAK controller choose a fixed step strategy that is appropriate for each installation Com pressors Table 6 1 Example Setup of Fixed Step Strategy 6 1 5 Suction Float The E2 in conjunction with the PAK may be programmed to adjust or float the suction pressure setpoint based on the case temperatures of one or more cases This feature is called suc tion float Suction float combines th
31. OPE OPE This screen shows the current values of com pressor discharge temperature inputs 1 through 8 The third line of the display shows inputs 1 through 4 from left to right and the fourth line of the display shows inputs 5 through 8 from left to right If a sensor input is unused disconnected or there is a break in the wire OPE will be shown to indicate an open input If a sensor input is shorted its value will be shown as SHO 8 3 3 Status Screen 3 Cond TD 11 0 Amb 2 Temp OPEN Cond Temp 74 1 Disch Pres 99 4 Cond TD The Cond TD is calculated by sub tracting the ambient temperature from the con denser s discharge temperature calculated by converting the discharge pressure to tempera ture The Cond TD is compared to the PAK s Condenser TD setpoint when controlling the fans Amb 2 Temp The current value of the Ambient Temp sensor 2 or OPEN if this sensor input is unused MultiFlex PAK Hand Held Terminal Interface 33 Cond Temp The Cond Temp is the condenser discharge temperature calculated by converting the discharge pressure input value to a tempera ture Disch Press The current value of the discharge pressure input This is the same value as shown in Status Screen 1 only repeated here for easier comparison to the other values on this screen 8 3 4 Status Screen 4 Suct Pres 34 0 DB SP 4 0 45 0 12345678 00 0000 Suct Pres The current value of the suction pres sur
32. RT SCREENS coria ys be a CARO ke RA Eve n ne SEKE SEKE T 8 3 PAK STATUS SCREENS ay 5v5 yk dd H y lle n k ye bez yk edil n v WA ek K VR SOU CC OL ca iaa daa de EN MI ODA NETE E TE WAE SAN SEWE E AE AMEYE YE VEKE WANE WEH ES US O a ID DAUS SCLCCID tao data n ev LEN AS catia AA LA RAE A ah asta ins Wet At rre VIA ASTOLUS SCA mua E EA A A A E E abad Sd LOTUS SCIEN Sol n NESR W aA A WAA A SAN A EE MR A Ba OR ONDE KM eee SITO LOTUS SELCON O Go yd y eyan Picea baie Rees ase Pw Te esas y ev ae EE EERE e a M ey ee n M e wine SI LOTUS Se X221 I Eon V A IS AI N nets Ma A Se EA E E a E DN DN Os DIO S1101 CONS A TANE LOE ETE re E Tara TA EEE BRIS ASIN ATA a aA GI akan ODS SOLUCION E ENE E EAE E AA E E AEN OEE A E a E y EAR NN SN e IL OTA a DA xy STATUS ESCENA LA RR AI a AA Et m ne AA A Ad 8 4 PAK CONFIGURATION SCREENS sscscooscsncvivsee k d a k der sa k d E EK d erey ec K RIK e snes sua Ss dea ek ene gu ned d la k E cavaceosts doideeve 8 4 1 The PAK Configuration Menu 8 4 1 1 1 General 8 4 1 2 2 Comp SP 8 4 1 3 3 Outs 8 4 1 4 4 CondSP 8 4 15 5 IN puts 4554 Seha NE A Bod Grn AS YI SN DD DD DD Dl gg N Table of Contents vii 1 Overview of the Multi Flex Product Line The MultiFlex line of control system boards provides a wide variety of input output and smart control solu
33. Setpts C4 C5 PAK Inputs C6 Outputs C7 PAK Outputs C8 Fixed Steps C9 Safet CO MORE MultiFlex PAK PAK661 Alarms High Disch Type High Dsch Setpt High Disch Dly HighDisAlrmPrio Low Suct Type Low Suct Setpt Low Suct Delay LowSucAlrmPrio High Suct Type High Suct Setpt High Suct Delay HighSucAlrmPrio SensorAlarmPrio F1 PREU TAB F2 NEXT TAB F3 EDIT F4 LOOK UP FS CANCEL Figure 7 12 PAK Screen B Alarms This screen is under the MORE tab at the top of the screen and is accessible by pressing ME and then selecting Ml Alarms This screen is where you specify what type of advisories you want the E2 s PAK application to generate when failures occur You may choose advisory types setpoints priorities and delays for most alarm types generated by the PAK Programming the PAK using E2 MultiFlex PAK E2 Interface 31 8 MultiFlex PAK Hand Held Terminal Inter face All MultiFlex boards have a Hand Held Ter minal interface which can be used to view status for the board without having to use the site con troller Though different for each model of Mul tiFlex the Hand Held Terminal interface allows you to perform the same general functions View failure messages that relate to the MultiFlex View the status of inputs View the current state of relay outputs ON or OFF HAND EE HELD es E E TERMINAL JACK and analog outputs both in
34. TD calculation If the ambient air tempera ture falls below this setpoint the value of this setpoint will be used as the substitute ambient air temperature in the TD calculation Disable Interlock Discharge Pressure When the discharge pressure rises above the Interlock Disable setpoint interlock will be disabled to prevent fans being locked OFF when needed to lower the discharge temperature Screen 5 CondSpray 330 AmbLockOut 24 Rtn2Nrml 270 Off Delay 30 M Cond Spray SP The Condenser Spray SP con trols operation of the condenser spray output If the discharge pressure rises above the Condenser Spray Setpoint the PAK will activate the Con denser Spray output The output will remain active until the discharge pressure falls below the Rtn2Nrml setpoint and remains there longer than the Rtn2Nrml Time MultiFlex PAK Hand Held Terminal Interface 41 Amb Spray Lkout The Ambient Spray Lock out setpoint is the ambient air temperature below which the condenser spray output will be locked OFF Rtn2Nrml and Off Delay The Return To Nor mal setpoint is the cut off pressure for the con denser spray When the pressure falls below this setpoint and remains there for an amount of time equal to the Off Delay the condenser spray out put will turn OFF Screen 6 Analog Fan Max Volts MinOnVolts Min On Pct Fan Max Volts The Fan Max Volts is the volt age of the analog output that corresponds to the maximu
35. VSD Fan is o sis sis X32 G2 VB Fan SCQuen Cen see esene o ratita 21 6 2 2 Minimum Pressure Set Point iye a y y y teie t a S ay WAW aa AR A R ay A Aa E a Vaye k na H n c Waa n cot v k wa au AAA 22 02 35 DISCHAT SEP EESSULE MAN e LEA ale tte sites uh A E A E ce Sate le alana Bika n 22 6 24 Condenser SPU Di dia lo gi kan n aa a Vi lav ia xa a AA asan ka ka alav a raw i4an 22 ODD A SS ay ae AN A sie Sats ahs A ne DE sk gaia Stead gu Ke EEN PR AD n an S Ve MO YNK 22 6 2 6 Quiet Mode LA A Cla C dag iA AAA elec lesa Bie eS 23 6 2 6 1 Exiting or Cancel lin g Qulet Mode dy ycn yene y Hena tcl spl ela NEN Ka a KEKE d Hd E eka ka EEE cas 23 6 2 1 Safety Fedtur es A A ees Mant kan ja AAA sad ara Q daa aa Saa la anan Aha A n 23 6 2 7 1 Discharge Tripa dai edi 23 6 20 A E RO A RR 23 7 MULTIFLEX PAK E2 INTERFACE cccccecssessecnsssovasssnvssssvsosssennseesdenssceatesevossbacesesonsssoesscessdeveseensdeeseseosecosesnsvoosscennss 24 1 1 ADDING DELETING A PAK sitet ed stil hate AN E NN 24 Zedda A AGING a PARK N DD DED E DD rrr Dr 24 LADA DECO ERAS MA M M MA MILA MI E MD Wi de e dd Ai hans da nod do dado 25 7 2 SETTING THE CONNECTED AND READ SETPOINTS ATTRIBUTES ccccesessesessesessssessesessesesscsesecsesecsesscseescseecseeeegs 25 ELLE VETUVIA Online Status A da e ea aianei 25 73 VIEWING THEPAR STATUS SCREEN Ayan n ne Keleka ac 26 LU PS ANPUISSANG
36. X PAR tices r e eye E KEYEY itt eee EY DK SU EC VER NEREVE AR VERA te ls dg ee Bal aaa iets 1 LAAT H rik We io ize y a A Viya REA nebe IS 1 2 MOUNTING AND PO WERIN e lt 5 533 5k5454 5 5535e53 a0 ci keba s s ay xuy d Sea ce d xes sk kek V Ve Hee b n s se S3 inicia alicia wek dee bes e 2 Zele COSNAP TRACK INSTALLATION a A aaa 2 2 2 THE PLUG IN OUTPUT BOARD gt is siye picada Ira raia na e lis ER podria bids bve H na ek Ne NAKA Re Ek n e Fe Hd Wek y k 3 Ae POWERING THE M UL TIELEN yen Qe Prayer k k xen E e Here EYE Veye da e det ey ee Pele v re K Y bs 3 D3 ds CHOOSING Transformer Size ta aa aA da daa Mladen da bavk 4 2 3 2 MultiFlex Combination Input Output Board Power Wiring L L ue esasek eke keke ekere 4 2 3 2 1 New Style MultiFlex Combination I O Boards with Isolated Power Supply ekere kek ek ke e 4 2 3 2 2 Old Style MultiFlex Combination I O Boards No Isolated Power SupDly keke eke kenek keke 5 2 3 3 Wire Types and Maximum Di stQnces L L L L ELE suce eee aya yaaa ayak aya ya keyaye yekek narran 6 3 THE VO NE EW QIR K 5 4555465 is553553454554335 44 ne u a Ha ye ku erao Eae E Eos Ke en BEK B J 5E y ba y 4 e dr eE SEEKOS neS raoir GU SERAN 7 3l WIRING TYPES iia ves cutive dee e e nea Hee HEE n Wi y aa Ay en H de Aaa H ne
37. an ON delay after each activation regard less of the number of fans called for by TD con trol 6 2 4 Condenser Spray If a condenser spray output is configured the PAK can be programmed to activate a water spray to keep the discharge pressure from climb ing above a user defined pressure set point The spray is activated when the discharge pressure rises above the condenser spray set point and shuts off when the pressure falls below the Return To Normal set point which is the cut off pressure for the condenser spray lon ger than the Condenser Spray OFF time To prevent unnecessary activation of the spray when the ambient conditions make evapo rative cooling less effective the PAK can be pro grammed with an ambient temperate lock out which prevents the spray from activating if the ambient temperature is below a user defined ambient lockout set point 6 2 5 Interlock Interlock is an optional feature that cycles OFF all condenser fans if e No compressors are operating AND 026 1722 Rev 4 03 JUN 2010 The discharge pressure is below a user defined Discharge Pressure Interlock Disable setpoint Interlock mode ends immediately if one or more compressors is brought ON or if the dis charge pressure rises above the Discharge Pres sure Interlock Disable setpoint 6 2 6 Quiet Mode When using VS condenser fans the PAK has a Quiet Mode which may be enabled to limit fan speed to reduce noise Quiet Mode is a
38. ar to the current Condenser TD strategy implemented in E2 s own Condenser Control cell TD control in the MultiFlex PAK uses a con trol value that is calculated by subtracting the ambient air temperature near the condenser fans from the calculated discharge temperature cal culated by converting the discharge pressure to temperature based on the refrigerant type This control value is compared to a fixed temperature differential set point and condenser fans and or sprays are activated or deactivated to attempt to keep the control value at or near the TD set point Condenser Control 6 2 1 Condenser Control Strate gies 6 2 1 1 In the Staged Fans strategy when the TD value is above the setpoint the PAK activates the FanStage outputs in sequence beginning first with FanStagel and ending with FanStage4 When the TD falls below the setpoint the PAK deactivates the FanStage outputs in reverse sequence beginning with FanStage4 and ending with FanStagel The PAK observes fan ON and OFF inter stage delays as it activates and deactivates fan stages 6 2 1 2 VSD Fan The VSD Fan strategy is designed to control TD using a variable speed fan Staged Fans The PAK uses two outputs to control the VS fan inverter a relay or digital output called VSEnable that is CLOSED to send a forward run command to the inverter and an analog out put called VSDAnalog whose voltage com mands the inverter to run at a specific perce
39. ate at 9600 baud set switch 6 UP and 7 DOWN For 19200 baud set switch 6 DOWN and 7 UP Refer to Figure 3 2 for a visual look at how the switches must be set 8 MultiFlex I O Board Operator s Guide 3 2 3 Setting the Terminating Re sistance Jumpers All MultiFlex boards and other RS485 devices have a set of terminating resistance jumpers one jumper for each wire lead These jumpers are labeled JP2 JP3 and JP4 on the MultiFlex board The purpose of the jumpers is to indicate the two ends or termination points of the segment On a daisy chain one device at the beginning and one device on the end must be terminated On the MultiFlex this is done by placing all three termination jumpers in the OUT toward the left edge of the board position To untermi nate a MultiFlex these jumpers must be set to the IN toward the center of the board position Figure 3 3 shows the termination jumper set tings for all MultiFlex boards ses RMINATION JUMPERS NO TERMINATION TERMINATION Figure 3 3 I O Network Termination Jumper Settings 026 1722 Rev 4 03 JUN 2010 4 I O Board Input and Output Setup 4 1 The inputs on a MultiFlex board are compat ible with a wide range of analog and digital sen sors and transducers In general the inputs are capable of reading analog voltage s
40. bined case temp calculation The inhibit delay is designed to allow the case enough time to recover its case temperature setpoint 6 1 5 3 Bad Case Temp Inhibit In addition to excluding case temperatures from circuits or case controllers that are not in refrigeration the PAK application in the E2 will exclude up to a user defined number of case temperatures from cases determined to be poor performers A poor performing case is defined as one whose temperature deviates outside of the float temperature deadband 026 1722 Rev 4 03 JUN 2010 When the number of cases classified as poor performers exceeds the user defined maximum number of cases to be excluded it will compare each case s deviation from the float temperature setpoint to determine which cases are the worst performers highest deviations are excluded first If desired an alarm or notice may be gen erated when a poor performing case is excluded 6 1 5 4 Suction Float During Loss of Communication Because suction float requires a large num ber of inputs and the MultiFlex PAK board has only sixteen the PAK cannot use suction float in stand alone mode When the PAK is in stand alone mode either by design or because of loss of communication with its parent E2 suction float will be disabled and the pack will be con trolled using the fixed suction pressure setpoint 6 2 Condenser Control The MultiFlex PAK uses a temperature dif ferential TD strategy simil
41. ction 7 3 For E2 press to enter the Setup Editor 28 MultiFlex I O Board Operator s Guide Each setup screen contains a number of fields used to program the PAK or the E2 inter face to the PAK For descriptions of each field highlight the field value using the arrow keys then press HELP to read the on line help 7 4 1 Screen 1 General 08 09 07 Use Ctrl X to Select CX Tabs RX 366 Unit 1 C1 General Comp Setpts A C Outputs C7 PAK Outputs General Nane Long Name Refr Type Pressure Units il ENABLE Cond Interlock ON Number of Comps 16 Staged Fans 4 Enable SP Float No F1 PREU TAB NEXT TAB F3 EDIT Fa STATUS FS CANCEL Figure 7 3 PAK Screen 1 General In the General screen enter a name for the PAK application specify the temperature and pressure units you will be using and enter the number of compressors and condenser fans 7 4 2 Screen 2 Comp Setpts 08 09 07 Use Ctrl X to Select CX Tabs C2 Comp Setpts 11 18 58 ALARM RX 366 Unit 1 SETUP enera ond Setp PA C Outputs C7 PAK Outputs C8 C9 Safet 0 MOR ex PA PAKOO Comp Setpts Ua SUCT PRES STPT SuctPres Deadbd Grp Comp 16 F1 PREU TAB NEXT TAB F3 EDIT F5 CANCEL Figure 7 4 PAK Screen 2 Compressor Setpoints The Compressor Setpoints screen is where you must enter the suction pressure setpoint and deadband as well as assign each compr
42. ctivated and deactivated through the use of an input in the E2 s PAK application This input may be tied to a Time Schedule application if you wish to enable Quiet Mode during night hours When the Quiet Mode input is ON the E2 limits the maximum speed of the VS fan to the Quiet Mode setpoint If the VS fan is called by the PAK s condenser control algorithm to be above the Quiet Mode setpoint the fan speed will be fixed to the Quiet Mode speed and the control temperature setpoint will be set equal to the current control temperature 6 2 6 1 Exiting or Cancelling Quiet Mode Quiet Mode is cancelled if any of the three events occur 1 The Quiet Mode input turns OFF Quiet Mode ends 2 The E2 loses communication with the PAK Quiet Mode is suspended until communica tion is restored 3 The discharge pressure rises above the Disch Prs Max setpoint the PAK will allow the fan speed to increase up to 100 until the pres sure falls below the Disch Prs Max setpoint then PAK will resume Quiet Mode Condenser Control 6 2 7 Safety Features 6 2 7 1 Discharge trip is a safety feature that will shut down all compressor groups if the discharge pressure rises above a critical user defined set point Discharge Trip Discharge trip occurs immediately the moment the pressure rises above the set point All compressors shut off and an alarm is gener ated and sent to E2 notifying of the trip condi tion The stat
43. d maximum voltage of the sensor output in the Liq Level Min V and Liq Level Max V fields Then enter the percentages represented by these two voltages in the Liq Level Min and Liq Level Max fields MultiFlex PAK Hand Held Terminal Interface 43 Screens 4 19 Input Setup 1 Suct Xdcr Name The sixteen Input Setup screens are where the input types for MultiFlex PAK inputs 1 through 16 must be defined The input types are listed and described in Table 4 1 on page 9 8 4 1 6 6 Safety Screen 1 Safety Shutdowns HiDisch Pres NO Reset All NO The read only field HiDisch Pres indicates whether or not a safety shutdown due to high discharge pressure is active YES indicates an active shutdown If HiDisch Pres is YES the safety shut down may be reset from this screen Move the cursor to the Reset All field and press POINT or MINUS to change the value of the field to YES Screen 2 Disch Trip 340 Reset Diff 50 15M Reset Delay Resets PH 5 Disch Trip The Discharge Trip setpoint is the discharge pressure value that if exceeded by the Discharge Xducer input value will cause a safety shutdown of the refrigeration system Reset Diff When a safety shutdown due to dis charge trip occurs the Reset Diff is the amount the discharge pressure must fall below the Dis charge Trip setpoint before the PAK will auto matically reset the safety shutdown and resume normal control In other words if
44. e 026 1722 Rev 4 03 JUN 2010 6 PAK Software Over view 6 1 6 1 1 The maximum number of compressor groups is eight Each compressor group corresponds to a physical relay point on a MultiFlex board PAK activates and deactivates compressor groups in order to control the suction pressure Compressor Groups Maximum of Groups The total maximum number of individual compressors that can be controlled by the PAK is sixteen regardless of how many compressor groups these compressors are associated with Compressors are only activated or deactivated as part of a compressor group however a PAK input may be set up to read the discharge temper ature for any or all of the compressor groups The number of compressors that may belong to a single compressor group is limited by the amperage rating on the MultiFlex output point max 2A up to 240VAC Note When splitting up compressors into the eight groups the total compressor HP should be spread out as much as possible to make use of as many compressor groups as possible 6 1 2 Required Setpoints The setpoints required for compressor group operation are Suction Setpoint Suction Dead band Suction Outer Deadband and fixed step ON and OFF delay times You will also need to configure which groups will be ON for each step in the fixed step strategy 6 1 3 Compressor Group Stage Activation and Deactivation For both Cyclic and Fixed Step compressor group control strategies
45. e case temperatures from up to 20 different sources into a single tem perature value either by taking the average value the median value or the maximum value This value is then compared to the suction float setpoint and a deadband range around the set point As a result of this comparison the E2 may adjust the suction pressure setpoint higher or lower in an attempt to move the combined case Compressor Groups PAK Software Overview 19 temperature in line with the float setpoint A graph showing an example of suction pressure setpoint adjustment versus float temperature is provided in Figure 6 1 D FLOAT TEMP DEAD BAN T INTERVALS SETPOINT OINT UNCHANGED FLOAT TEMP WITHIN DECREASE SETPOINT DEADBAND INCREASE SETPOINT FLOAT TEMP ABOVE FLOAT TEMP BELOW DEADBAND DEADBAND Figure 6 1 Suction Pressure Setpoint Vs Float Temperature The amount of the interval for each adjust ment as well as the frequency of adjustment is programmable by the user Also the user must specify a minimum and maximum range for the suction setpoint to prevent suction float from floating the setpoint too high or too low 6 1 5 1 Up to 20 case temperatures may be used to provide the combined case temperature used during suction float The E2 may use case tem peratures from Suction Float Input Sources Standard Circuit applications in the E2 e Emerson Climate Technologies EC2 case
46. e input This is the same value as shown in Status Screen 1 only repeated here for easier comparison to other values on this screen DB SP The number to the left of the slash is the programmed deadband value around the suc tion setpoint The number to the right of the slash is the programmed suction setpoint Comp Groups Comp Groups The fourth line of the display shows the current state of each of the compres sor group on the PAK The characters shown here numbered 1 through 8 will be when the compressor group is active and 0 when the compressor group is inactive Unused groups will also be shown as 0 8 3 5 Status Screen 5 Cond TD 12 1 DB SP 4 4 8 3 12345678 000000 Cond TD The Cond TD is calculated by sub tracting the ambient temperature from the con denser s discharge temperature calculated by converting the discharge pressure to tempera ture This is the same value as shown in Status Screen 3 only repeated here for easier compari son to the other values on this screen Cond Fans 34 MultiFlex I O Board Operator s Guide DB SP The number to the left of the slash is the programmed deadband value around the con denser TD setpoint The number to the right of the slash is the programmed condenser TD set point Cond Fans The fourth line of the display shows the current state of each of the condenser fan groups corresponding to the fan group outputs on the PAK The characters s
47. esecaeeaeesesaecaeeseeeenaeeaeers 42 THE RELAY OQUTRUTS 25 55 E ARA AAA al 4 2 1 Output Types Supported by the MultiFlex PAK u sesa ea keka kaye e yeke eka kek eka ye 4 2 2 The PAK Default Output AsSignmenis ula enana kaka kE yekeya kake ka kak ek ek kk ke 4 23 ZA DD bKbr SX r rXrXWXX5X5X r r r rrr r r r rd r bww_ e bm eb gmn 12 4 2 4 Output Fail Safe Dip Switches ULh E cE Lusa ease yaaa kaseya anar keke eka kek eke ka kek ka kek ek k k RAS 12 4 2 5 Relay Output Ratings and Fuse Protect on L use ayak eka ayayayay ae ke yekeyek nn 13 4 3 THE ANALOG AND DIGITAL OUTPUTS o Ayi aae Vane Ka PE KEK a daa ka VAK a Ken Gen E AKTAY K 14 4 3 1 Digital Analog Output Types Supported by the MultiFlex PAK 14 4 3 2 The PAK Default Analog Digital Output 4SsSignmenis u ussa eee aaay eee eee 14 5 BOARD STATUS LEDS 6 2 cusicsctssescassecadecsusisclcasdstinesduacesbecadscectussstespecdss s UV Ke de k s ue s Ee s ieoa P Hew be U iaa ciedad caci n 15 Dele STATUS LED cosas Doe e eeowo w oe areraArRrrrbbbbbb rr oo 15 3 2 TXAND RX LEDS oiio rr n gg rr 15 3 CODE A AND CODE B LEDS menene isc isis yev EE cases dee ahy e K eee VE R EE doves E WAE O SER e D R MR i S 15 54 RELAY OUTPUT LEDS ree a E Ea Or Cash E R OEEO KERRE RE E REA EON 1 K6 Er R 16 Table of Contents v 6 PAK SOFTWARE O VERVIT W 54x0 4
48. essor to a compressor group 026 1722 Rev 4 03 JUN 2010 7 4 3 Screen 3 Cond Setpts m RX 366 Unit 1 to Select CX Tabs SETUP C3 Cond Setpts C9 Safet k 88 enera omp Setp C Outputs C7 PAK Outputs Cond Setpts Value COND TD STPT Cond TD DeadBd Fan On Dly Fan Off Dly Disch Pres Max Disch Pres Min Interlock Dis Cond Spray SP Amb spray lkout Rtn2Nrml Rtn2NrmTm Fan Max Volts Fan Min On Volt US Min On Pct Enter 6 to 166 6 DDF Condenser TD Setpoint F1 PREU TAB F2 NEXT TAB F3 EDIT Fa STATUS FS CANCEL Figure 7 5 PAK Screen 3 Condenser Setpoints The Condenser Setpoints screen is where you must enter the discharge pressure setpoint and deadband as well as setpoints that deter mine the TD calculation and operation of other condenser systems such as the condenser spray Condenser fans are also assigned to con denser fan groups outputs in this screen 7 4 4 Screen 4 Float Setup etp C4 Float Setu enera omp Setp ond PA C6 Outputs C7 PAK Outputs C8 Float Outs C9 Fixed Steps C6 OR Enter 26 6 to 166 6 PSI Floating max pressure limit F1 PREU TAB F2 NEXT TAB F3 EDIT Fa STATUS FS CANCEL Figure 7 6 PAK Screen 4 Float Setup Setpoints The Float Setup screen is where setpoints and case temperature inputs for the Suction Float feature are configured This screen is not visible unless the Enable SP Float
49. f the delay indicates the suction pressure will return to within the Suction Dead band range in an amount of time equal to an additional Step ON or Step OFF delay it will delay compressor stage changing for one delay period Example a PAK has a suction setpoint of 45PSI a Suction Deadband of 4PSI a Suction Outer Deadband of 8PSI and a Step ON and Step OFF delay of 30 seconds each With all PAK Software Overview 17 stages turned OFF the suction pressure climbs from 45PSI to 49PSI taking it above the top edge of the Suction Deadband With the Step ON delay already satisfied the PAK will cycle ON a compressor group After cycling the group ON since 49PSI is between the inner and outer deadband the PAK will analyze the direction and slope of the suc tion pressure change Fifteen seconds after the first stage activation 1 2 the Step ON delay the suction pressure is measured to be 48 5PSI At the end of the Step ON delay the pressure is 48 0PSI Since the pressure is currently changing at a rate of 1PSI per Step ON delay period the PAK will determine that even though the pressure is still above the top edge of the Suction Deadband if another Step ON delay period were to elapse with no further activations the pressure at the end of the next delay period would be 47PSI within the deadbana In this case the PAK will not activate more compressors and will remain in the current state for at least one more Step ON dela
50. field 68 16 67 RX 366 Unit 1 10 15 29 CONNECTED 1 0 FULL ALARM 1 Unit Number THIS 61 1 Unit Name 1 0 Net Devices Ctrl Type Ctrl Type Ctrl Type 16A1 MultiFlex CUB WTPK 8R0 MultiFlex PAK WPK 8D0 MultiFlex ESR ccB 4A DFNC IRLDS WCC ECT Devices 6 ISD 1 6 8 CtriLink RSC 8 CtriLink CD 6 CT Drive Third Party Devices 41 EKC 514 Echelon Devices E cc100 Liquid 8 CS166 Ckt Suction 6 CC166 Suction 6 ESR8 Line Up TD3 Case Display 8 EC2 39x Control Echelon 16Al Echelon 8R0 EC2 29x Control Figure 7 1 Controller Setup Screen NOTE Unlike other MultiFlex board types the PAK will NOT automatically show as Online in the Online Status screen You must first set the Connected parameter in the PAK application to Yes See Section 7 2 Setting the Connected and Read Setpoints Attri butes 026 1722 Rev 4 03 JUN 2010 7 1 2 Deleting a PAK To remove a PAK from the E2 Log in to the E2 amp Press Di to access the System Configuration Menu amp Press l Network Status Setup Press 2 j Connected I O Boards amp Controllers Change the number of PAK boards in the PAK Control lers field to the correct number of boards When PAKs are deleted in this way E2 will always delete the highest numbered PAKs first Therefore if you have seven PAKs numbered 1 7 and you change the number of PAKs to five the E2 will delete board 6 and 7 leaving boards 1 through 5 7 2 Setting t
51. ght and line four contains the fields for 5 through 8 left to right For each condenser fan specify a fan group assignment from 1 8 8 4 1 5 Screen 1 5 Input 100PSI 200 SuctXdcr CompAmps CondAmps 30 LiqDig OK CLSD Suct XDucr Specify the size of the suction pressure transducer being used in this field You may choose 100 1b or 200 Ib PAK Configuration Screens Cond CT Amp Size and Comp CT Amp Size The Cond CT Amp Size and Comp CT Amp Size fields specify the size of the current trans ducers in amps measuring power consumption for the condenser and compressor pack respec tively The rating entered here should be the cur rent value that corresponds to a 5VDC output from the current transducer LiqDig OK Choose the digital state of the liq uid level sensor that corresponds to liquid level OK in this field Choose CLSD if the sensor is CLOSED when the liquid level is OK or OPEN if OPEN when OK Screen 2 Input Offsets Suct Pres 0 0 Disc Pres 0 0 Amb Temp 0 0 These three fields are used to offset the val ues of the Suction Pressure Discharge Pressure and Amb1 Temp inputs to correct for sensor inac curacies The value entered in an offset field will be added to the value as read by the sensor Screen 3 Liquid Level 0 5 100 These four fields determine how the PAK will translate the voltage of the Liquid Level input into a percentage Enter the minimum an
52. gle PAK Use the ar TOW E to highlight the PAK you wish to view and press The PAK Status Screen for the PAK you se lected will appear Figure 7 2 10 24 07 zam RX 400 Unit 1 Press Log In Out to Log On PAK STATUS Suct 49 0 lt T Suct Temp 53 6 Liq Level NONE Comp Amps 83 7 Cond Temp 72 8 72 5 Amb1 Temp 57 5 Disch Prs 152 9 Cond Amps COMP HPZAMP STAT PROOF DISCH COMP STATUS GRP Grp 12 ON 119 4 ON Grp 2 Grp 3 Grp 4 Grp 5 Grp 6 Grp 7 Grp 8 COND FAN HP AMP STAT 4 OFF COMP Strategy Fixed Steps COMP Mode COND Mode Max Cap Off Fixed Step 7 Connected Connected PAK State Online Press enter for a list of actions F1 SUCTION F2 CONDENSER F3 CIRCUITS FS SETUP Figure 7 2 PAK Status Screen The PAK Status Screen shows the current sta tus of all compressors and condensers Though there is a large amount of information on a PAK status screen status information is grouped on this screen in several groups of related informa tion in order to make the screen easier to read These groups are described below 26 MultiFlex I O Board Operator s Guide 7 3 1 Inputs and Set Points The top four lines of the PAK Status Screen show the current values of all the important inputs and set points in the PAK controller Suct The Suct field shows the current value of the suction pressure The value shown in smaller type to the right of the suction pressure field
53. he Connected and Read Setpoints At tributes Unlike other MultiFlex devices the PAK will not automatically communicate with the E2 once the board is properly numbered and added in the Connected I O screen To enable commu nication with the PAK you must set the Con nected parameter in the General tab of the PAK setup screens to Yes By default a new PAK added to the E2 will have the Connected parameter set to No The PAK also has a feature called Read Set points which allows contractors who configure the PAK via Hand Held Terminal before connec tion to an E2 to have the PAK setpoints saved to the E2 upon initial connection 1 Press UB Configured Applications 2 Select item 187 MultiFlex PAK If multi ple PAKs are associated with this E2 a list Setting the Connected and Read Setpoints Attributes will appear prompting you to select a single PAK Use the arrow keys to highlight the Enter PAK you wish to view and press E 3 Press SETUP 4 Use the arrow keys to highlight the Con nected field Press Y to set this field to Yes 5 If you want the E2 to read the setpoints from the PAK and write them to the E2 upon con nection set the Read Setpoints field to Yes 23 10 07 Eg W KX 499 UNIT 1 Use Ctrl X to Select CX Tabs SETUP C1 Gen l C2 Comp Setpts C3 Cond Setpts C6 Outputs C7 PAK Outputs C8 Float Outs General Value HT1 PACK Long Name Refr Type Pressure Un
54. he plug in output mod ule Each switch corresponds to an output on the board switch 1 output 1 etc Table 4 5 and Table 4 6 show how the fail safe switch and Form C contacts should be con figured based on how you want the output to perform during both normal operation and dur ing network power loss Note There are not many cases where you would want a relay to be OPEN when called to be ON For most applications you will want to set the fail safe switch to UP so that an ON com mand from the controller will close the relay 026 1722 Rev 4 03 JUN 2010 State of Normally Closed N C Contacts on MultiFlex Relay Points Fail safe Bess or Loss of Communi Switch Power cation Table 4 5 Output Board Fail Safe and Switch Settings when Contact is Wired Normally Closed N C State of Normally Open N O Contacts on MultiFlex Relay Points Fail safe Eos oF Loss of j Communi Switch Power cation Table 4 6 Output Board Fail Safe and Switch Settings when Contact is Wired Normally Closed N O 4 2 5 Relay Output Ratings and Fuse Protection Each relay output on the MultiFlex Combi nation I O boards is rated for up to 240 VAC with a maximum current of 2 amps Each relay is fused with a 2A fast blow 5mm x 20mm fuse Bussman GMA 2 or equivalent The Relay Outputs 1 O Board Input and Output Setup 13 4 3 The Analog and Digital Outputs 4 3 1 Digital Analog Output Types Supported by the MultiFlex PAK
55. hown here num bered 1 through 8 will be when the fan group output is active and 0 when the fan group out put is inactive Unused outputs will also be shown as 0 8 3 6 Status Screen 6 Cond Temp 74 1 DB SP 4 4 8 3 VSD 0 0 En OFF 0 0V Fault OFF Cond Temp The Cond Temp is the condenser discharge temperature calculated by converting the discharge pressure input value to a tempera ture DB SP The number to the left of the slash is the programmed deadband value around the cur rent condensing temperature setpoint The num ber to the right of the slash is the condensing temp setpoint which is calculated by adding the programmed condenser TD setpoint to the ambi ent temp used for control VSD The current operating speed of the VSD represented as a percentage of its maximum speed En The current state of the VSD Enable relay which is ON when the VS Fan is called to be ON and OFF when the VS Fan is called to be OFF V The voltage value shown directly below the VSD field is the current output voltage of the PAK analog output controlling the VS Fan Fault The current state of the VSD Fault input 026 1722 Rev 4 03 JUN 2010 8 3 7 Status Screen 7 Suct Temp Comp Amps Cond Amps Liq Level Suct Temp The current value of the suction temperature input value or OPEN if unused Comp Amps The value of the current trans ducer measuring amperage used by the compres sor pack If unused
56. ignals in the range of 0V to 7VDC and dry contact no out side voltage digital sensors and switches The Inputs The specific types of input devices that must be used with MultiFlex is largely dependent on the site controller MultiFlex is connected to refer to the site controller s user s manual for a full list of compatible sensors and specific sen sor wiring instructions The Inputs 4 1 1 Input Types Supported by the MultiFlex PAK Suct Xdcr Pressure transducer measuring suction pressure Disch Xdcr Pressure transducer measuring discharge pressure Amb Temp 1 Temperature sensor measuring outdoor air temperature Amb Temp 2 Optional second ambient air temperature sensor Will be combined with Amb Temp 1 to determine the ambient air temp DischTemp 1 8 Compressor discharge temper ature sensors for compressors 1 through 8 Liq Level Liquid level transducer Comp Amps Current transducer measuring current on the compressor pack Cond Amps Current transducer measuring current on the condenser Suct Temp Suction return air gas tempera ture External digital fault detection device CLOSED when the pack is failed Dig Fault Alarm Reset Input used for switch or push button to reset alarms active on the PAK Connected to the fault output from the VS Fan inverter noti fies the PAK of an inverter fail ure Dry contact liquid level sensor Table 4 1 MultiFlex PAK Input Types VSD Fault
57. iled e Disch Trip The discharge pressure has exceeded the discharge trip setpoint causing the compressor group to shut down e OutDB Delay Due to the Suction Outer Deadband feature the PAK has skipped a compressor stage change because it deter mined the suction pressure was returning to within the Suction Deadband Cond The Condenser Mode field explains the current state of the condenser fan control algo rithm in the MultiFlex PAK There are seven messages that may appear here OFF All condenser fans are OFF and the discharge pressure temperature is low enough to not require any fans to be acti vated e OFF Delay The PAK is calling for fan stages to deactivate and PAK is waiting for the OFF Delay time period to elapse before deactivating the next fan stage ON Delay The PAK is calling for fan stages to activate and PAK is waiting for the ON Delay time period to elapse before activating the next fan stage e DeadBand The TD is within the setpoint deadband and therefore the PAK is neither activating nor deactivating any fan stages e Max Cap All condenser fans are ON but the TD is still above set point In other words PAK would activate more fan stages if more were available but it is operating at maximum capacity 36 MultiFlex I O Board Operator s Guide e Quiet Max Same as Max Cap see above except Quiet Mode is currently active and the PAK is operating the VS fan at the maxi mum speed al
58. its Temp Units 8 Cond Type Fan Seq Num of Cond Fan 6 Enable SP Float Yes Connected Read Setpoints Yes 3 N N0 Whether this unit has been hooked up yet F3 EDIT F 4 STATUS F5 CANCEL 6 Press to save changes and return to the Status Screen The E2 will attempt to establish connection with the PAK If the Read Setpoints field was set to Yes the E2 will read the setpoints from the PAK and write them to the PAK application s configuration If Read Setpoints is set to No the E2 will write the PAK application s setpoints to the PAK upon initial connection 7 2 1 Verifying Online Status If you have properly set up the MultiFlex PAK board on this E2 s I O Network after set ting the Connected parameter you can go view the status of the I O Network press D HE online Status If E2 and the PAK boards are communicating this screen will show the PAK board as Online If not it will be shown as Offline MultiFlex PAK E2 Interface 25 All PAK boards whose associated E2 appli cations have their Connected parameters set to No will be shown in this screen as status Unknown 7 3 Viewing the PAK Status Screen Once you have added a PAK to the E2 you will be able to see the status of the PAK board s from the front panel 5 Configured Applications 2 Select item 187 MultiFlex PAK If multiple PAKs are associated with this E2 a list will appear prompting you to select a sin
59. lic Cond StagedFans Control Strategy Comp This field determines the strategy the PAK will follow when activating and deactivating compressor groups Refer to Section 6 1 4 Compressor Control Strategies for more information Control Strategy Cond This field determines the strategy the PAK will follow when activating and deactivating condenser fan groups Refer to Section 6 2 1 Condenser Control Strategies for more information Screen 3 Num of Steps 6 Num of Comps 10 Num of Cond Fans 4 Num of Steps If using a Fixed Steps compres sor control strategy enter the total number of steps in this field Num of Comps Enter the total number of indi vidual compressors not compressor groups in this field Num of Fans Enter the total number of single speed fan stages not fan groups in this field Screen 4 PresUnits TempUnits PSI Deg C R404A RefrType SpecialCode O PresUnits Choose the engineering unit you wish to use for all displayed pressure values on the HHT in the PresUnits field PSI or KPA for kilopascals TempUnits Choose the engineering unit you wish to use for all displayed temperature values on the HHT in the TempUnits field Deg F or Deg C MultiFlex PAK Hand Held Terminal Interface 37 RefrType Choose the refrigerant type used in the refrigeration system in this field SpecialCode This field is used by ECT person nel for service purposes Screen 5 Cond and
60. lowed by the Quiet Mode setpoint e Cond Spray The condenser spray output is currently ON Suct Float If the PAK is currently enabling suc tion float to occur the display will show ON in this field Otherwise if suction float is not active the display will show OFF 8 4 PAK Configuration Screens Some but not all of the configuration of the MultiFlex PAK may be changed using the HHT HHT users may change setpoints redefine input and output type assignments and override relays or analog digital outputs HHT Changes When PAK is Connected to E2 All changes to setpoints made by the HHT are temporary if the PAK is connected to a par ent E2 Changes made in the HHT do not change the configuration stored in the E2 When the HHT is unplugged from the PAK all changes made by the HHT are overwritten by the E2 including output overrides If you wish to make permanent changes to the MultiFlex PAK s con figuration you must make them through the E2 or through a remote communication program connected to the E2 such as UltraSite32 HHT Changes When PAK is Stand Alone If the MultiFlex PAK is operating stand alone with no connection to an E2 the HHT is the only method that may be used to change con figuration When the HHT is unplugged from the PAK all changes to configuration will be saved Overrides made with the HHT however will be cancelled when the HHT is unplugged 026 1722 Rev 4 03 JUN 2010 8 4
61. m VS fan speed Fan Min ON Volts The Fan Min ON Volts is the voltage of the analog output that corresponds to the minimum fan speed when the VS fan is ON Fan Min ON Pct The VS Min ON Pct is the minimum percentage at which the VS fan will operate when ON When switched ON the VS fan will begin operating at this percentage Screen 7 VSD Fan Setup Volts MinuteRate 10 0 10 0 Volts Minute Increase The VS Increase Volts per Minute Rate is the rate in volts per minute that the analog output controlling the VS fan will increase when a higher fan speed is being called for Increase Decrease Volts Minute Decrease The VS Decrease Volts per Minute Rate is the rate in volts per minute that the analog output controlling the VS fan will decrease when a lower fan speed is being called for 42 MultiFlex I O Board Operator s Guide Screen 8 VSD Fault Input ActiveLevel OFF VSD Max Output QuietMode 100 VSD Fault Active Level The VSD Fault Active Level is the input state on the VSD Fault input that indicates a VS fault Typically a VS fault causes an OPEN input state If the VS inverter closes the fault input on failure change the value of this field to ON VSD Max Output Quiet Mode This setpoint sets the maximum VS fan speed when the PAK is operating in Quiet Mode Screen 9 Fan Seq Setup Step Volts Led ALL Off 0 Volts 1st On 2 0 Volts Screen 9 sets the operating parameters for the Fan
62. n or building equipment man ufacturer Therefore the installer need only make the necessary connections between the boards and the site controller s In some instances an installer may be required to mount an I O board There are no restrictions on the location of these boards how ever for ease of network configuration it is rec ommended that the boards be located adjacent to the E2 I O boards may be mounted without an enclosure but they should be mounted in a loca tion that is not easily accessible to avoid tamper ing or damage 2 MultiFlex I O Board Operator s Guide 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 1875 mounting slots Figure 2 1 shows this installation procedure 1 REMOVE THE BOARD AND THE INSULATOR FROM THE SNAP TRACK 2 MOUNT THE SNAP TRACK USING THE 1875 SLOTS PROVIDED tm OPERATION OF THE BOARD THSIRSULATOR MUST TEMPORARILY REMOVE BENSERTEDBETWEN THS INSULATOR WHILE seda ak TESWACKHO HUTAGSUPsRugy OOS WARRANTY AND VERO TOPE MAY CAUSE SERIOUS DAMAGE TO THE BOARD 3 REINSTALL THE INSULATOR IN THE SNAP TRACK 4 REINSTALL THE BOARD IN THE SLOTS IN THE SNAP TRACK 26501040 Fig
63. net work 5 3 Code A and Code B LEDs The MultiFlex PAK has two LEDs labeled Code A and Code B These LEDs indicate fail ure conditions When these LEDs are OFF there are no failures active When one or both of these LEDs are blinking there are failure conditions The rate of blinking indicates the type of failure Code A Failure Conditions Blinking fast 4 times second There is a problem with the flash memory or hardware clock on this board This generally means the board is bad and must be replaced Blinking slow 1 time second The board is not re ceiving any messages addressed to it This means ei ther the I O network is down or it has not yet been Board Status LEDs 15 commissioned in the E2 or REFLECS Network Configuration screen Code B Failure Conditions Blinking 2 times second This indicates the board has lost its configuration If Code B blinks at this rate on an operational board it means the board must be reprogrammed This light does not blink if the board is new or is us ing the unmodified default configuration 5 4 Relay Output LEDs Each relay output point on a MultiFlex has an indicator LED that shows the status of the output This LED is lit to show the output is ON and unlit to show the output is OFF The definition of ON and OFF in this case is determined by the position of the fail safe dip switch see Table 4 5 and Table 4 6 16 MultiFlex I O Board Operator s Guid
64. ntage of its maximum speed When the TD is above the setpoint the PAK will close the VSEnable output and set the VSDAnalog output voltage to the user defined minimum fan speed percentage The VS fan will increase RPM from the minimum fan speed up to the maximum fan speed as long as the TD is above setpoint When the TD falls below the set point the fan speed is reduced until the mini mum fan speed is reached at which point the fan will be deactivated after a user defined delay time 6 2 1 3 Fan Sequencer Because the MultiFlex PAK board has only twelve outputs to conserve the number of out puts required the PAK supports control of con denser fan stages through the use of a single PAK Software Overview 21 analog output called Fan Sequencer which then can be used as an input to a third party device that translates this voltage to a series of relay activations The control method for Fan Sequencer is similar to the method used for Staged Fans see Section 6 2 1 1 except each fan stage is repre sented by an analog voltage on the Fan Sequencer input When the TD is above setpoint the PAK starts from all fans OFF 0V and begins activating fan stages by increasing the voltage in a series of steps with each step corre sponding to a fan stage The user must program two setpoints the voltage that will activate the first fan stage and the step voltage amount that will be added to the current voltage every time a ne
65. o an Earth ground Do not connect the center tap of the trans former to the OV terminal Rule 2 Do not power an old style MultiFlex non center tapped board with a transformer that is also powering a center tapped device Mounting and Powering 5 This means you cannot connect an old style MultiFlex non center tapped board to a trans former that is powering a MultiFlex 16 16AI 8RO 4AO 8DO a Gateway board or any pre vious generation CPC board that uses center tapped power Doing so will destroy the Multi Flex board Rule 3 The secondary of the transformer must not be grounded on any side 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 In addition the old style MultiFlex combina tion boards can be powered by one of the SOVA or 75VA non center tapped transformers listed in Table 2 1 on page 3 Figure 2 6 shows how to wire the transformers to the MultiFlex boards 2 3 3 Wire Types and Maximum Distances For powering I O boards use only the listed wire types from Table 2 3 Three conductor non shielded cables are the recommended wire for connecting between the center tapped trans former and the I O boards Shielded cable should not be used for power wiring The center tap should be wired with the third conductor to earth ground at the transformer Each MultiFlex board should
66. own Fixed Step This field shows the number of the currently active fixed step 7 3 3 Compressor Status Because compressor group stages may con tain more than one compressor the center box shows the status of each individual compressor in the PAK along with the compressor group number assignment 7 3 4 Condenser Fans The right side of the PAK Status Screen shows the current status of the condenser fans Fan Stages 1 through 4 If the condenser is using single speed fan stages either by using Staged Fans strategy to control the fan stage relays OR by using Fan Sequencer to control the fan stages through an analog sequencer the status of each fan stage from through 4 will be shown in a box on the right side of the screen VS Fan Status If the condenser is using variable speed fans the VS and the state of the VSD Enable relay will be shown on the right side of the screen A VS Fault status will also be shown which will display ON if the inverter has failed Cond Mode The Condenser Mode field explains the cur rent state of the condenser fan control algorithm in the MultiFlex PAK There are seven messages that may appear here e OFF All condenser fans are OFF and the discharge pressure temperature is low enough to not require any fans to be acti vated e OFF Delay The PAK is calling for fan stages to deactivate and PAK is waiting for the OFF Delay time period to elapse before deactivating the
67. parameter on Screen 1 is set to Yes Programming the PAK using E2 The Float Case input definitions are where you must define each circuit s case temp value As long as the source of the case temp value is a Danfoss EKC514 DFMC Woodley case con troller EC2 case controller or E2 Standard Cir cuit application the E2 will automatically read the controller or application s case state refrig eration defrost etc and consider the case state when determining whether or not to exclude the case s temperature from the suction float tem perature combination 7 4 5 Screen 5 PAK Inputs RX 366 Unit 1 SETUP C5 PAK Inputs a omp Setp ond Setp C Outputs C7 PAK Outputs C8 C9 Safet 0 MOR ex PAK PAKOS Liq Level Min Liq Level Max Liq Level Min U Liq Level Max U SuctPres Offset DiscPres Offset Amb1Temp Offset Input Typet Suction Press Input Type2 Input Type3 Input Type4 Input Types Input Type Discharge Press Ambient 1 Temp Ambient 2 Temp Suct Rtn Gas Temp Compressor Amps Enter 6 to 166 6 PCT Liquid level minimum out Figure 7 7 PAK Screen 5 PAK Inputs The PAK Inputs screen is where you must assign each of the 16 PAK inputs to an input type Other setpoints on this screen control how certain inputs are read such as liquid level sen sors CTs and the suction transducer MultiFlex PAK E2 Interface 29 7 4 6 Screen 6 Outputs u RX 388 Unit 1
68. pressors asso ciated with the group and a Status field which shows whether the group is currently ON or OFF COMP Mode The Compressor Group Mode field explains the current state of the fixed step control algo rithm in the MultiFlex PAK There are seven messages that may appear here e OFF No compressor groups are ON and none are being called to be ON Off Delay The MultiFlex PAK requires less compressor HP AMPS and is trying to cycle backward through the fixed steps but PAK is currently waiting for the fixed step OFF delay to elapse before moving to the next lower step On Delay The MultiFlex PAK requires more compressor HP AMPS and is trying to cycle forward through the fixed steps but PAK is currently waiting for the fixed step ON delay to elapse before moving to the next higher step e DeadBand The suction pressure is within the set point dead band The PAK will remain on the current fixed step and is not attempting to move up or down to a new step e Max Cap The PAK has cycled through the fixed steps all the way to the last step but the set point is still out of range In other words the PAK would activate more HP AMPS if more were available but it is operating at maximum capacity e XDucer Fail The suction pressure trans ducer input has failed Viewing the PAK Status Screen e Disch Trip The discharge pressure has exceeded the discharge trip setpoint causing the compressor group to shut d
69. reen 8 Fixed Steps RX 366 Unit 1 A 11 23 51 SETUP FULL ALARM CS PAK Inputs CO MORE Scroll using Next Prev keys Output il1 F1 PREU TAB F2 NEXT TAB F3 EDIT F4 LOOK UP F5 CANCEL Figure 7 10 PAK Screen 8 Fixed Steps The number of steps that appear on this screen is determined by the number entered in the Number of Steps field in Screen 1 For each step specify which compressor groups will be active by changing the field in the numbered column representing the group num ber to X Inactive compressor groups must have a in the group number field Use the and amp keys to toggle the field value Refer to Section Example of Fixed steps for more information about setting up fixed steps 026 1722 Rev 4 03 JUN 2010 7 4 9 Screen 9 Safety 08 09 87 RX 366 Unit 1 11 24 26 Use Ctrl X to Select CX Tabs SETUP C1 General C2 Comp Setpts C3 Cond Setpts C4 CS PAK Inputs C6 Outputs PATTEM eee ttt ees co Safet CO MORE MultiFlex PAK PAK661 Safety Disch Trip Stpt Reset Diff Disch Reset Dly Disch Auto Rst L F1 PREU TAB F2 NEXT TAB F3 EDIT Fa STATUS FS CANCEL Figure 7 11 PAK Screen 9 Safety The Safety screen is used to set up various safety shutdown features for the PAK such as discharge trip and suction temperature trip 7 4 10 Screen B Alarms 68 69 67 RX 366 Unit 1 11 24 52 Use Ctrl X to Select CX Tabs SETUP FULL ALARM C1 General C2 Comp Setpts C3 Cond
70. rps 9 9 to 16 12 0 0 0 0 0 0 0 0 Screen 6 is the same as screen 5 except the compressor group assignment fields on this screen are for compressors 9 through 16 Screens 7 26 Fixed Steps CompGrp gt 12345678 00000000 StepH1 HP Amps 0 The remaining screens under the CompSP menu option are for users of the Fixed Step method of compressor group control Each screen determines which compressor groups will be ON or OFF when the fixed step is active The eight characters on the third line of the display signify the states of compressor groups 1 8 Use the RIGHT ARROW and LEFT ARROW keys to point the cursor to the charac ter you wish to set and then use the POINT key or MINUS key to change the character to either 0 signifying OFF or signifying ON The HP Amps field on this screen is read only It shows for reference purposes the total amount of compressor HP or amps that will be ON when this step is active When finished press the DOWN ARROW key to move to the next screen and program the next step Repeat this process for as many fixed steps as you defined in Screen 3 under the Gen eral menu option Leave all unused steps set to all groups OFF 00000000 MultiFlex PAK Hand Held Terminal Interface 39 8 4 1 3 3 Outs Screen 1 and 2 Screens 1 and 2 are used to assign each of the eight relay outputs on the PAK board to an output type Refer to Table 4 3 on page 12 for a list of output
71. sfied When the TD is within the setpoint deadband no fan groups will be activated or deactivated Fan ON Delay and Fan OFF Delay The Fan ON Delay is the amount of time the TD must be above the Setpoint before turning ON a fan group The Fan OFF Delay is the amount of time the TD must be below the Setpoint before turn ing OFF a fan group 8 3 4 4 Screen 2 TD Control Pressure Limits 290 100 Disch Pres Max If the discharge pressure rises above this setpoint the PAK will override TD control and stage fan groups ON to bring down the discharge pressure The Fan ON Delay will be observed as each stage is activated Disch Max Disch Min Disch Pres Min If the discharge pressure falls below this setpoint the PAK will override TD control and stage fan groups OFF to bring up the discharge pressure The Fan OFF Delay will be observed as each stage is deactivated PAK Configuration Screens Screen 3 TD Control Fail Ambient Temp DiscPresSP 220 DeadBand 4 0 Disch Pres SP and Disch Pres DB The Dis charge Pressure Setpoint and the Discharge Pres sure Deadband will be used as the fallback setpoint and deadband if the TD calculation can not be made due to ambient temperature sensor failure Screen 4 TD Min Ambient Temp SP 1 7 DisableInterLock Disch Pres 305 TD Min Amb Temp Min SP The Ambient Temp Minimum Setpoint is the minimum allow able value of the ambient air temperature used in the
72. this feature DB The Deadband is the range of pressure val ues equally above and below the Suction Pres sure Setpoint within which the suction pressure is considered to be acceptable While the suction pressure input value is within this deadband value no compressor groups will be activated or deactivated Step ON Delay and Step OFF Delay The Step ON Delay is the amount of time the PAK will wait after the last compressor group activation before bringing on the next compressor group or advancing to the next fixed step The Step OFF Delay is the amount of time after the last compressor group deactivation before deactivating the next compressor group or moving down one fixed step Screen 2 Suct Pressure Min SP 0 0 Proof ReStarts PH 6 Dly 240 S Suct Pressure Min SP The Suction Pressure Minimum Setpoint is the lowest allowable suc tion pressure for the refrigeration system If the suction pressure falls below this setpoint all compressors will be turned OFF and will remain off until the suction pressure rises above the Suc tion Pressure setpoint Prf Restart Dly and Proof RestartPH Whena compressor proof registers a failure the Proof Restart Delay is the amount of time the PAK will wait in between attempts to reset the compressor proof failure by activating the compressor The PAK will try to reset a compressor for a maxi mum number of times per hour specified in the Proof Restart PH field After the maximum num
73. tions all of which are based on a single universal hardware platform The board design uses flash uploadable firmware and plug in expansion boards to configure the base plat form board and apply it for use as an input board relay output board analog output board or a combination I O board 1 1 MultiFlex PAK The PAK is a distributed pack controller that controls compressors and condenser fans The PAK can control up to 16 compressors con trolled in up to 8 compressor groups The PAK can control up to 4 condenser fan groups containing up to 8 total condenser fans The PAK condenser control strategy is sequen tial TD control with setpoint deadband using ON and OFF delays The PAK supports use of both single speed fan stages and VS fans 1 1 1 Hardware The MultiFlex PAK boards consist of two circuit boards a bottom layer with 16 combina tion digital analog inputs and a plug in top layer which contains a combination of 8 relay outputs and 4 analog DC voltage outputs which can be used as digital or analog outputs The communication interface is RS485 I O using the Standard Extended Address Form for CPC Distributed Controllers Currently the PAK is designed to interface with the CPC E2 RX controller and the previous generation refrigera tion controller the Einstein RX MultiFlex PAK Overview of the MultiFlex Product Line 1 2 Mounting and Power ing The MultiFlex boards are usually installed by the refrigeratio
74. transformer 120 208 240 VAC HOT BLUE NEUTRAL PRIMARY SIDE SECONDARY SIDE Figure 2 5 Wiring Non Center Tapped MultiFlex Boards to Transformers With a Center Tap In addition the MultiFlex combination boards can be powered by one of the 50VA or 75VA non center tapped transformers listed in Table 2 1 on page 3 Figure 2 6 shows how to wire the transformers to the MultiFlex boards Powering the MultiFlex You may also tie one side of the secondary but not BOTH sides or the center tap to an earth ground provided none of the boards pow ered by the same transformer are old style Mul tiFlex boards see Section 2 3 2 2 YELLOW 110 220 VAC CLASS 2 POWER veto 24 VAC P N 640 0041 110VAC Primary 50VA P N 640 0050 110VAC Primary 75VA P N 640 0042 220VAC Primary 50VA P N 640 0045 220VAC Primary 75VA Figure 2 6 Non Center Tapped Transformer Wiring All wire connections to earth ground should be less than six 6 inches long and use a wire gauge of at least 14AWG 2 3 2 2 Old Style MultiFlex Combina tion I O Boards No Isolated Power Supply Like the new style MultiFlex board the old style MultiFlex board can be connected to any of the center tapped transformers mentioned in Table 2 2 provided you follow the following three rules Rule 1 Ground the 0V terminal on the old style MultiFlex board t
75. troller with software version 1 83 or above In order to take advantage of new E2 and PAK features such as Danfoss EKC514 integra tion the E2 must be version 2 60 or above The Einstein RX and E2 versions before 2 60 do not support Danfoss EKC514 or some of the advanced features of suction float Using MultiFlex PAK boards with a central Einstein controller offers several benefits over simple stand alone PAK control including e Reporting of PAK related alarms in the Alarm Advisory Log The ability to log PAK inputs in an E2 log ging group e Remote access to PAK status and program ming from the E2 front panel or remote com munication tools InSite or UltraSite32 Communication between E2 and a PAK takes place over the RS485 I O Network Follow the instructions in Section 3 The I O Network to connect the PAKs to the E2 I O network Then follow the instructions in this chapter to set up the PAKs 7 1 Adding Deleting a PAK 7 1 1 Adding a PAK Before an E2 will communicate with a PAK it must be added as an I O board This task is per 24 MultiFlex I O Board Operator s Guide formed in the Controller Setup screen To access this screen Log in to the E2 amp Press lt Hi to access the System Configuration Menu Press MA Network Status Setup Press B Connected I O Boards amp Controllers Enter the number of PAK boards that will be networked with this E2 in the PAK Controllers
76. types and their functions Note that though the VSDAnalog and Fan Seq are selectable output types these functions cannot be performed by relay outputs Do not assign these two output types to any of the relay outputs Screen 3 and 4 AOut1 FanStaget ActiveLevel OFF AOut2 FanStage2 ActiveLevel OFF FanStage3 OFF AOut4 FanStage4 ActiveLevel OFF Screens 3 and 4 are used to assign each of the four analog digital outputs on the PAK board to an output type Refer to Table 4 7 on page 14 for a list of analog digital output types and their functions AOut3 ActiveLevel If you are assigning a digital output type i e any output type except VSDAnalog or Fan Seq you must also specify which state ON or OFF corresponds to active When the ActiveLevel is set to ON the output will be OVDC when inactive and 8VDC when active When the ActiveLevel is OFF the output will be 8VDC when inactive and 0VDC when active 40 MultiFlex I O Board Operator s Guide Screen 5 and 6 Output R7 NOR A1 NOR A3 NOR Screens 5 and 6 are used to override the relay outputs and analog digital outputs The R1 through R8 fields override relays 1 through 8 and the Al through A4 fields override analog digital outputs 1 through 4 To override an output highlight it with the cursor and use the POINT and MINUS keys to toggle the field value to either ON or OFF To cancel an override set the field value to NOR
77. ure 2 1 MultiFlex Snap Track Mounting Figure 2 2 provides mounting dimensions for the MultiFlex board 10 00 4 75 E pop 16AI 8RO 8DO AND MULTIFLEX BOARDS TOP VIEW 26501055 Figure 2 2 MultiFlex Board Dimensions 026 1722 Rev 4 03 JUN 2010 2 2 The Plug In Output Board Figure 2 3 Exploded View MultiFlex Combination I O Board All MultiFlex boards except the MultiFlex 16 have output sub boards that plug in to the top of the base board These boards are shipped with the output board pre installed on the board using stand offs so no additional hardware setup should be necessary The additional board makes the MultiFlex combination boards considerably taller than the MultiFlex 16 and all previous generation 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 base board and the panel door 2 3 Powering the MultiFlex All models of MultiFlex require a 24VAC Class 2 input power source The MultiFlex PAK requires the power source to be center tapped CPC supplies a wide variety of 24VAC trans formers with varying sizes and either with or without center taps Table 2 1 shows the trans former sizes and whether they are center tapped or non center tapped Xformer P N VA Rating Primary Voltage Center Tap 640 0041 50 VA 110 VAC No 640 0042 50 VA 220 VAC No 640 0056 56 VA Multi tap 120
78. us screen will show the status of both the compressor groups and the condenser fans as Disch Trip The pack remains shut down for a minimum user defined reset delay When this delay has passed the PAK will automatically reset the dis charge trip and resume operation if and only if the discharge pressure has fallen to an acceptable level determined by a user defined reset pres sure differential The PAK will only automatically reset a dis charge trip a user defined number of times in a one hour period default is five After the dis charge trip occurs this number of times the pack will be shut down and will remain shut down for the remainder of the one hour period After the one hour period the PAK will repeat the cycle of automatic retries until auto reset is successful or the alarm is manually reset in E2 6 2 8 Alarms The Multiflex PAK will communicate the following alarm conditions e High Discharge Pressure Trip e Ifa defined physical analog input sensor reading is OPEN or SHORT e Ifthe Multiflex PAK controller has a digital output as an Alarm Output then the relay will close when High Discharge Pressure Trip is active Ifset to Yes the Reset Alarm function will reset all alarms and restart the PAK PAK Software Overview 23 7 MultiFlex PAK E2 In terface The MultiFlex PAK is capable of communi cating with an E2 RX refrigeration controller version 2 10 and above or an Einstein RX refrigeration con
79. volts and in percentage Override relay outputs to a fixed ON or OFF state or override analog outputs to a fixed percentage Make temporary or permanent changes to set points Plugging In the Hand Held Terminal The Hand Held Terminal plugs into the RJ11 jack on the MultiFlex base board located on the bottom left side of the board as shown in Figure 8 1 Press the Hand Held Terminal connector into the jack until it snaps into place When the connector is correctly seated the screen to the Hand Held Terminal will display the message CPC Handheld Terminal and then the first screen of the MultiFlex interface Figure 8 1 MultiFlex HHT Jack Location 8 1 The HHT Interface 8 1 1 Navigation The Hand Held Terminal interface consists of a simple series of screens and menus Scrolling Through The Hand Held Screens The UP ARROW and DOWN ARROW keys are used to scroll through the screens Some of these screens are read only meaning there are no editable fields others are either menus that require you to enter a selection or are configura tion screens that have one or more changeable fields 32 MultiFlex I O Board Operator s Guide Shortcut Keys F1 and F2 At any time you may press the F1 key on the Hand Held Terminal to return to the Configura tion Menu or F2 to view the status screens 026 1722 Rev 4 03 JUN 2010 8 2 PAK Start Screens MULTIFLEX PAK 810 3082 VER 2 50F01 PRESS y
80. w stage is to be activated When the TD falls below the setpoint the Fan Sequencer output steps down the voltage in the reverse order of its increase until the voltage reaches OV all fans OFF Example a sequencing device is set up to control four stages of fans with the first sequence to be activated at an input voltage of 2 0VDC and the remaining three to be activated with a step voltage of 1 5VDC The Fan Sequencer voltage at each fan stage are Voltage Table 6 2 Example of Fan Sequencer Voltage and Fan Stage Mapping As the PAK brings on fan stages to lower the TD it will start with 2V then step up to 3 5V 5V and finally 6 5V to bring on fan stages When the TD setpoint is satisfied the PAK will sequence backwards from 6 5V to 5V then 3 5V 2V and finally OV to turn off all stages 22 MultiFlex I O Board Operator s Guide 6 2 2 Minimum Pressure Set Point To prevent overcooling the MultiFlex PAK features a minimum pressure set point If the value of the discharge condensing pressure falls below this set point regardless of the TD strat egy fans will be staged OFF one at a time observing the Fan OFF Delay after each deacti vation 6 2 3 Discharge Pressure Max The Discharge Pressure Maximum feature adds a second line of defense to TD control If the value of the discharge condensing pressure rises above the Disch Pres Max set point fans will be cycled ON one stage at a time observing the F
81. y period In the next Step ON delay period the pres sure measured at the first 15 seconds is 47 2PSI and the pressure measured at the end of the Step ON delay period is 47 3PSI In this case the pressure is both above the top edge of the Suc tion Deadband and increasing rather than mov ing toward the setpoint In this case the PAK will activate the next stage bringing on more compressors 6 1 4 Compressor Control Strate gies 6 1 4 1 Cyclic activates and deactivates compres sor groups using a First ON First OFF strategy Cyclic 18 MultiFlex I O Board Operator s Guide When the PAK must add one compressor group the group it selects will be the one that has been OFF for the longest amount of time Likewise when the PAK must deactivate a com pressor group it will deactivate the group that has been ON for the longest amount of time The advantage to the Cyclic strategy is over time the runtime of all compressor groups will be evenly distributed also ensuring no compres sors go inactive for long periods of time thus preventing compressor failure due to lack of use The drawback is Cyclic strategy assumes all compressor groups are the same size in terms of HP or amp ratings If the compressor groups are differing sizes performance is likely to suf fer when using the Cyclic strategy 6 1 4 2 The Fixed Step strategy sequences through a series of programmed compressor group ON OFF combinations as the P

026-1722 MultiFlex PAK User`s Guide

Contents

Download Pdf Manuals

Related Search

Related Contents