CPC MultiFlex PAK User Manual Download

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026-1712 Rev 3 03-JAN-2008

MultiFlex PAK Compressor/

Condenser Control Board

User’s Guide

Summary of Contents for MultiFlex PAK

Page 1: ...026 1712 Rev 3 03 JAN 2008 MultiFlex PAK Compressor Condenser Control Board User s Guide...

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Page 3: ...he 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 a...

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Page 5: ...PUT SETUP 9 4 1 THE INPUTS 9 4 1 1 Input Types Supported by the MultiFlex PAK 9 4 1 2 The PAK Default Input Assignments 10 4 1 3 Connecting Sensors to Input Boards 10 4 1 3 1 Wiring 10 4 1 3 2 Sensor...

Page 6: ...Interlock 22 6 2 6 Quiet Mode 23 6 2 6 1 Exiting or Cancelling Quiet Mode 23 6 2 7 Safety Features 23 6 2 7 1 Discharge Trip 23 6 2 8 Alarms 23 7 MULTIFLEX PAK E2 INTERFACE 24 7 1 ADDING DELETING A PA...

Page 7: ...Screen 4 34 8 3 5 Status Screen 5 34 8 3 6 Status Screen 6 34 8 3 7 Status Screen 7 35 8 3 8 Status Screen 8 35 8 3 9 Status Screen 9 35 8 3 10 Status Screen 10 35 8 3 11 Status Screen 11 35 8 4 PAK...

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Page 9: ...on 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 setpo...

Page 10: ...ded 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...

Page 11: ...earance 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...

Page 12: ...new style MultiFlex PAK board has a green power LED located next to the 24VAC connection terminal in the upper right corner of the circuit board see Figure 2 4 for reference If there is a power LED ne...

Page 13: ...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 2 3 2 2 Old Style MultiFlex Combina tion I O Board...

Page 14: ...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 ta...

Page 15: ...r 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 li...

Page 16: ...baud set switch 6 DOWN and 7 UP Refer to Figure 3 2 for a visual look at how the switches must be set 3 2 3 Setting the Terminating Re sistance Jumpers All MultiFlex boards and other RS485 devices ha...

Page 17: ...ducer 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 temp...

Page 18: ...C 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...

Page 19: ...e 4 2 for the location of these points 4 1 4 1 Current Ratings for On Board Power Sources The maximum current that may be drawn from the 12VDC terminal is 100 milliamps The maximum current that can be...

Page 20: ...ight corner the 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 f...

Page 21: ...ex Relay Points Fail safe Switch Light is ON Light is OFF Loss of Communi cation Loss of Power Up ON Closed Open Closed Closed Down OFF Open Closed Closed Closed Table 4 5 Output Board Fail Safe and S...

Page 22: ...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 Output Type Description Comp Grp1 8 Compressor Group output...

Page 23: ...age 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 net work 5...

Page 24: ...ational 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...

Page 25: ...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 acti...

Page 26: ...oups using a First ON First OFF strategy 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 dea...

Page 27: ...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 ran...

Page 28: ...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 i...

Page 29: ...activated or deactivated to attempt to keep the control value at or near the TD set point 6 2 1 Condenser Control Strate gies 6 2 1 1 Staged Fans In the Staged Fans strategy when the TD value is above...

Page 30: ...t 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 b...

Page 31: ...l resume Quiet Mode 6 2 7 Safety Features 6 2 7 1 Discharge Trip Discharge trip is a safety feature that will shut down all compressor groups if the discharge pressure rises above a critical user defi...

Page 32: ...he 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...

Page 33: ...s E2 a list will appear prompting you to select a single PAK Use the arrow keys to highlight the PAK you wish to view and press 3 Press E SETUP 4 Use the arrow keys to highlight the Con nected field P...

Page 34: ...essure 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 temp...

Page 35: ...e more HP AMPS if more were available but it is operating at maximum capacity XDucer Fail The suction pressure trans ducer input has failed Disch Trip The discharge pressure has exceeded the discharge...

Page 36: ...t 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...

Page 37: ...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 Sta...

Page 38: ...outputs and four analog digital outputs on the MultiFlex PAK 7 4 8 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...

Page 39: ...creen B Alarms This screen is under the MORE tab at the top of the screen and is accessible by pressing 4 and then selecting Alarms This screen is where you specify what type of advisories you want th...

Page 40: ...1 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...

Page 41: ...atus Screen 1 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 St...

Page 42: ...es on this screen 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 p...

Page 43: ...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 associat...

Page 44: ...neither activating nor deactivating any fan stages 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...

Page 45: ...d press the DOWN ARROW key Flash This read only field shows the number of times the flash memory has been rewritten Screen 2 Control Strategy Comp This field determines the strategy the PAK will follo...

Page 46: ...tion of 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...

Page 47: ...een 6 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 The remaining screens under the CompSP menu option are...

Page 48: ...ride 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...

Page 49: ...The Fan OFF Delay will be observed as each stage is deactivated Screen 3 Disch Pres SP and Disch Pres DB The Dis charge Pressure Setpoint and the Discharge Pres sure Deadband will be used as the fall...

Page 50: ...at the analog output controlling the VS fan will decrease when a lower fan speed is being called for Screen 8 VSD Fault Active Level The VSD Fault Active Level is the input state on the VSD Fault inpu...

Page 51: ...mp 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 ren...

Page 52: ...ntrol In other words if 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 An automatic reset...

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