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MultiFlex RCB Rooftop Controller Installation and Operation Manual

1. 13 4 2 3 Relay Output Ratings Fuse 14 4 95 ANALOG OURPUTS 15 4 3 1 Wiring the RCB Analog Output 5 15 5 5 16 Dede TATU SG ED T 0 16 Dee EDS 16 5 35 SHE CODE AC 16 5 45 17 Sie RELAY EDS 17 6 SOFTWARE OVERVIEW si ccscsccicssescscncdssesccvecsivscdsvesetevssdvesedecsvecebesecsebeesuecdss swebasesssbessnterss SSE LS 18 6 1 INTRODUCTION TO ZONE CONTROL iiie t TEEPE E E EEE EREE CETE E R 18 6 2 TEMPERATURE CONTROL A EEEE AE E EEE Ea 19 PA PE A 0 E E E E E 19 Table of Contents MultiFlex RCB Operator s Guide v 6 2 1 1 Staged Heating and Cooling oo ccc cccessssssessesscescesceecesecaecsecsecasesseasesseseesseesceaceacsseesesseceeceacsaeaaeaaeaaecaecae
2. dads Naga Eben ta Hag gD Noe degen Ses eet 6 5 OUTSIDE ATR CONTROL 0 51 COD COMMON 6 522 AOS AAA 6 5 2 1 Operation of Two Position Dampers During Economization 6 5 2 2 Operation of Variable Position Dampers During Economization 6 5 2 3 Economization Enabling Strategy 6 3 3 SMOKE DDE te CLI ON the gaa cde 6 5 4 Priority When Economization CO2 Control and Smoke Detection Are Used 25 REVERSING VALVE CONTROL SE A EEE TES 26 6 7 STAND ALONE OPERATION dbase seutedvestdvavestesessascuvducovevesteucesedisaseceyedtovestesectevesterestgvests feetetedteds 26 6 7 1 Dehumidification and Humidification Stand Alone Operation 100000000000 26 6 7 2 CO2 Control Stand Alone oein nreti eiea i osoni r aen ea SEE ie ari era E 26 6 7 3 Stand Alone Operations en EESE Eao SiE E ree 26 6 7 4 Summer Winter Season Occupied Unoccupied 26 0 7 9 Other Stand Alone Operation serrer e
3. EES E 1 1 3 INDEPENDENT 5 2 1 2 MOUNTING AND POWERING 3 221 3 22 THE PLUG IN OUTPUT BOARD cies 4 2 3 POWERING THE MULTIFLEX RCB 4 2 31 Choosing Transformer SES 5 2 322 Multik lex RCB Power Wiring Wide need ee i 3 2 3 3 Wire Types and Maximum 5 2 4 THE MULTIFLEX RCB BATTERY AND BATTERY ENABLE JUMPER 7 3 THE VO NETWORK sisessscscsiccsssccccsdede stscsssieesascosssvedsssesenssostnessbeveseassessbetesces skis ses doshobsedecessbebeudcesssebovensdevevoveceses sosusatess 8 3 1 WIRING TYPES he aces eee te dl vended cede 8 Chains sc 8 37 92
4. Code 5 Tx Rx LEDs i F Figure 5 1 MultiFlex Status LED Locations 5 1 Status LED The Status LED blinks GREEN once per second to show that the board is powered and operational If this light is dark the board has likely lost power 5 2 Tx and 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 Einstein or REFLECS The Rx LED blinks once when the MultiFlex receives a message 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 16 MultiFlex RCB Operator s Guide STATUS LEDs 5 3 TheCodeALED The Code A LED on the MultiFlex RCB indicates activity on the Hand Held Terminal port When this LED isnot blinking it means no HHT is plugged into the board When it is blink ing rapidly it means an HHT is present The Code A LED will also glow without blinking for 1 2 second every time a screen update occurs on the HHT 5 4 TheCodeBLED The Code B LED is an indicator of the state of the I O network When this LED is flashing once every four seconds the RCB is communi cating properly on the I O network When the LED is flashing once every two
5. 73 1 Table 6 2 PID OFF Percentages for Staged Outputs Stage ON and OFF Delays Heating and cooling stages may be also be set up with on and off delays When a stage is called to be turned ON or OFF if will wait until the ON or OFF delay has passed before turning it ON or OFF Software Overview 19 Each stage follows its own ON and OFF delay separate from all other stages and will observe them regardless of whether or not a stage is activated or deactivated out of the nor mal sequence lowest numbered stages ON first highest numbered stages OFF first 6 2 1 2 Occupied Unoccupied Setpoints and Summer Winter Setpoints The RCB itself may be programmed with different setpoints that are used during occupied and unoccupied building times The RCB has two ways of determining whether to use occupied or unoccupied set points If the RCB 15 asociated with a zone in an Einstein or BCU it will use whatever occupied state the zone says to operate in 1 e the zone controls the schedule If the RCB is not con nected to a zone or if the RCB loses communi cations with its parent controller the RCB uses a fallback schedule that is saved in its own mem ory which may be programmed with up to two start and end times for each of the seven days of the week for occupied and unoccupied building times The RCB board i
6. The value by MinV affects the hand held display and scales the per centage displayed on the HHT When the voltage is at MinV the per centage in this field is displayed in the hand held This increases to 100 as the analog output value increases to MaxV MaxV 10 0 42 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 8 8 Scheduling Road Map from Description RCB Main Menu The seven screens under the SCHED mau option inthe Control Menu are where you set the occupancy scheduling events for RCB when it oper Sunday ates in stand alone mode This schedule will only be followedwhen the occ RCB is in stand alone mode if connected to a Zone application in E2 SP1 0 00 the RCB will always use the occupancy schedule followed by the Zone application 0700 Each day of the week may have upto two OCC UNO event pairs Enter the time occupancy mode will start in the OCC column and the time oc cupancy mode will endin the UNO column Use the DOWN ARROW key to scroll through the screens to program events for different days Sunday Saturday 8 9 Overrides Road Map from Description RCB Main Menu There are four screens under the OVRRD menu option in the Control Menu These screens be used to override any of relay output DigOut1 and analog output points on the RCB board DigOute To override a digital relay output locate the DigOut field whose number DigOut3 corresponds to the numbe
7. 2 RS485 I O NETWORK 10 HAND HELD TERMI NAL JACK 3 RCB INPUTS 1 8 11 RELAY OUTPUT CON NECTORS 4 RCBINPUTS 9 16 12 RELAY OUTPUT FUSES 2A rated 250V slow blow 5 NETWORK D IIPD 13 RELAY STATUS LEDs SWITCHES 53 54 INPUT TYPE DIP 14 OUTPUT FAIL SAFE SWITCHES 51 52 SWITCHES 7 BOARD STATUS LEDs 15 ANALOG OUTPUTS Code A B General Status DC POWER OUTPUTS 3 at 5VDC 1 at 12VDC 16 NETWORK STATUS LEDs The MultiFlex Rooftop Control Board RCB P N 810 3062 is a rooftop HVAC con trol board for use either as a stand alone control ler or in zone control applications using a CPC E2 BX building control system The MultiFlex RCB is capable of controlling heat and cool stages fans humidification and dehumidifica tion devices economizers using on board I O and control algorithms as well as monitor and interact with other building control systems and peripherals such as smoke alarms and CO2 sen sors Table 1 1 MultiFlex RCB Differences Between the MultiFlex RCB and the Multiflex RTU Differences Between the MultiFlex RCB and the Multiflex RTU The RCB is an improved version of the Mul tiFlex RTU The RCB has sixteen fully configu rable analog and digital nput points whereas the RTU has only eight inputs two of which are configurable The RCB has four analog outputs for use in controlling variable speed fans econo mizers or modulating heating and or cooling valves whereas the RTU has on
8. 7 3 6 Other Actions from the RCB Status Screen 7 3 6 1 Detailed Status A more detailed status screen can be dis played for this RCB by pressing the key from anywhere on the RCB Status Screen to call up the Action Menu then selecting 6 Detailed Status Detailed Status shows the current values of all inputs and outputs related to the RCB and the E2 s RCB application 7 3 6 2 To setup the RCB press F5 from the RCB Status Screen 7 3 6 3 The RCB accumulates runtime statistics for its heat and cool stages air fan and condenser fan These runtimes may be viewed from E2 in the Detailed Status screen see Section 7 3 6 1 under the Outputs tab You may also view them with a HHT connected to the RCB Setup Reset Runtimes You may reset one or all of the runtimes from the E2 front panel From the RCB Status Screen 1 Press to call up the Action Menu Viewing the RCB Status Screen 2 Select 10 Runtime Resets from the Action Menu The RCB Runtime Resets screen will appear 300 Unit 13 RESETS IRCB Runtime Resets No No No No F5 CANCEL Figure 7 4 RCB Runtime Resets Screen To reset an individual runtime move the cur sor to highlight which runtme you wish to reset press to change the value to Yes and then press the UP or DOWN arrow key to exe cute the runtime reset When the field changes back t
9. 8 3 1 2 1 Numbering the MultiFlex 9 91 3 SCHING THE Band Bide ou de US ax es La 9 3 1 4 Setting the Terminating Resistance 9 4 002 00 covdveccescsssvecsscsssiueseccdessueiucdessnvetscossdnsoducdedsndvwessscssscvessocsssoncsisossss 10 4 1 EAE MULTIFEEXSR CB INPUTS E EERE O ECNO 10 4 1 1 Wiring Sensors to the MultiFlex 11 delet SWI 4 1 1 2 Sensor Wiring Types 4 1 1 3 Input Dip Switches 4 1 2 On Board Power 12 4 1 2 1 Current Ratings for On Board Power Sources ccscsssesssescesesceseseeeceseseecueeecsecseeecsecsseecaeeaceesseescsaescaenaeacaesaeeecsecaeeeeness 12 4 1 2 2 Powering Sensors Requiring 24VAC the Power 12 4222 THE MULTIFEEX RCB OUTPUTS 12 424 Wiring Outputs 10 Ea i Soa 13 4 2 2 Output Fail Safe Dip E
10. DAMAGE TO THE BOARD 3 REINSTALL THE INSULATOR IN THE SNAP TRACK 4 REINSTALL THE BOARD IN THE SLOTS IN THE SNAP TRACK 26501040 Figure 2 1 MultiFlex Snap Track Mounting Figure 2 2 provides mounting dimensions for the MultiFlex board 4 75 TYP 2 PL 16 1 8 8 AND MULTIFLEX BOARDS TOP VIEW 26501055 Figure 2 2 MultiFlex Board Dimensions Mounting and Powering 3 _ SSS The additional board makes the MultiFlex 2 2 The Plug In Output Board RCB boards considerably taller than the Multi Flex 16 and other CPC IO boards If you will be mounting these boards in anenclosure the board will need at least 2 5 of clearance between the base board and the panel door 2 3 Powering the MultiFlex RCB Board WARNING All models of MultiFlex require a A 24VAC Class 2 input power source The Multi Flex RCB requires the power source to be non center tapped Refer to Section 2 3 1 Choos ing Transformer Sizes for center tap usage 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 Figure 2 3 Exploded View MultiFlex RCB The MultiFlex RCB has an output sub board that plugs to the top ofthe base board Typically these boards are shipped with the output board pre installed on the board using stand offs so no additional h
11. Shows the values of the 16 RCB inputs 3 RUNTM 4 MISC OUTPUT Shows the value of the 8 RCB outputs Select 1 RUNTM Shows the accumulated runtimes of the heat and cool stages the air fan and the condenser fan MISC Shows the current control temp value occupancy state and number of stages available for dehumidification Choosing 1 INPUT from the Status Menu displays a series of four screens that show the definition of each point on the RCB and its cur 5 73 0 rent value The first screen shows the name and value of points 1 SuplTemp 67 6 through 4 Press the DOWN ARROW key to view points 5 8 9 12 and 71 7 13 16 on the next three screens CL1 Prf OFF Status Menu The MultiFlex RCB Hand Held Interface 35 Road Map from Description RCB Main Menu Relay Status Choosing 2 OUTPUT from the Status Mau displays series of screens that show the definition and state ofthe RCB relay outputs and the def inition and current value of the RCB analog outputs The first screen shows the names and values of points 1 through 4 Press the DOWN ARROW key to view points 5 8 and analog points 1 4 on the next three screens Analog Output Status VS Fan 0 00 Out Dmpr 5 00 NDF 0 00 NDF 0 00 Choosing 3 RUNTM from the Status Menu displays a series of screens that show the number of hours the cool and heat stages the air fan and the condenser fan havebeen operating since the last rmt
12. operates the fan at the highest setting 40 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 Road Map from Description RCB Main Menu 2 SP If using outside air dampers to control CO2 levels the CO2 SP is the control setpoint that will be used If the measured CO2 level rises Co2 SP 1000 above this setpoint the air dampers will be opened to lower the CO2 DmprOccMin 5 level UnOccMin 5 DmprOccMin When the RCB is operating in Occupied mode the Dm DigCutIn 25 prOccMin is the minimum percentage the damper will remain open even when economization is not being used If the building you arecon trolling has air quality standards that require the damper be open to a minimum position enter that position in this field DmprUnoccMin When the RCB is operating in Unccupied mode the DmprUnoccMin is the minimum percentage the damper will remain open even when economization is not being used If the building you are controlling has air qudity standards that require the damper be open to a minimum position enter that position in this field DigCutIn Because PID Control is being used to determine economiza tion damper position even if the dampers are not variable position two position or digital dampers are controlled by comparing the PID percentage to a cut in setpoint When the economization PID is above the DigCutIn setpoint the dampers will be OPEN When the econo mization PID is below the DigCutlIn setpoint the d
13. these terminals labeled SIG reads the signal from the sensor while the other labeled 0v is where the sensor s ground and or cable shield wire is connected Wiring MULTIFLEX INPUT POINTS Ov 516 INPUT 1 Figure 4 2 Input Board Points 4 1 1 2 Specific wiring types are required for each type of sensor used with Einstein 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 bewired with shielded 3 conductor 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 1 3 Each MultiFlex input point has an input type dip switch that must be set The input type dip switches for the RCB are on the switch bank labeled S1 Input Type Dip Switches The MultiFlex RCB Inputs RCB Input and Output Setup 11 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
14. 2 RCB Output Types 4 2 1 Wiring Outputs to Points The MultiFlex RCB has Form C relay con tacts Figure 4 6 shows how to wire the three terminal Form C contact The MultiFlex RCB Outputs 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 teminal 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 3 and Table 4 4 on page 14 RELAY IS OPEN ON POWER FAILURE RELAY IS CLOSED ON POWER FAILURE N O Figure 4 6 Form C Contact Wiring 4 2 2 Output Fail Safe Dip Switches 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 the plug in output mod ule Each switch corresponds to an output on the board switch 1 output 1 etc Table 4 3 and Table 4 4 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 oper
15. Diff Dehum When Differential VS Fan Control is being used the Diff Dehum setpoint is the difference between the return and supplyair tem peratures the RCB will try to maintain during dehumidification The VS fan speed will increase or decrease to keep the dehum differential equal to this setpoint Typically you will want to specify a higher dif ferential set point than the Diff CL SP so that the fan speed will be slower during dehumidification Mode This field selects whether the fan will be controlled in Staged or Differential mode Refer to Section 6 3 2 Variable Speed Fan Con trol for a description of these modes Econ When economization is active withno heating orcooling stages ON the VS Fan will operate at the percentage specified in the Econ 100 field BESE Idle 100 Idle When no heating or cooling stagesare butthe fan isoperating VS Fan Staged in Continuous mode the VS Fan will operate at the percentage spec DehumOfset O ified in the Idle field VS Fan Staged Dehum Offset When using Staged fan control the Dehum Offset will be subtracted from the total fan speed when dehumidifica tion is active in the RCB This slows the fan speed down for more ef fective dehumidification The HT1 HT4 and CL1 CL4 parameters in this screen are the VS fan speed setpoints used when using Saged VS fan control The RCB looks at the fan speed settings for all stages that are currently ACTIVE and
16. dehumidifica tion works identically to fan control during cool ing except the RCB will use an alternate differential set point when dehumidification is active Typically this is used to specify a higher differential setpoint to decrease the fan speed preventing overcooling and improving dehumid ification performance Economization VS Fan Speed When economization is enabled during cool ing but no other cooling stages are active the VS fan will operate at the economization fan speed setpoint 22 MultiFlex Operator s Guide Idle VS Fan Speed When using the Differential VS strategy with the Continuous fan mode see Section 6 3 Fan Control the RCB will use the Idle VS Fan Speed setpoint when no cooling or heating is active 6 4 Dehumidification and Hu midification Control Unlike Temperature Control Dehumidifica tion Control and Humidification Control is han dled entirely by zones A zone typically has a single humidity sensor humidistat or dewpoint probe input connected to the central building controller that measures relative humidity or dewpoint for the entire zone If the zone deter mines that dehumidification or humidification is necessary it notifies all RCBs in the zone to begin dehumidification 6 4 1 Dehumidification Control RCBs dehumidify by using cool stages and auxiliary outputs that are configured on the RCB as dehumidification devices When dehumidifi cation is needed the RCB w
17. keep cooler air from entering and open the damper when the mixed air is above set point and requires cooler air from outside 24 MultiFlex RCB Operator s Guide If the RCB calls for cooling to be OFE or the RCB determines outside air conditions are not favorable for economization the RCB will close the damper to a user defined minimum damper position 6 5 2 3 Economization Enabling Strate gy The RCB has a multi level strategy for deter mining whether outside air conditions are favor able for economization Each method of economization checking has a level of priority and the RCB will always use the economization method that is the highest priority of all valid methods If the RCB cannot use a particular method either due to setup or sensor failure it will attempt the next lowest priority method The methods listed in the order of priority from highest to lowest are 1 Enthalpy Switch The highest priority econ omization checking method If an input is set up on the RCB as an Enthalpy Switch the RCB will read the value of this input and enable economization when the switch is CLOSED and disable economization when the switch is OPEN If no enthalpy switch is present on the RCB the RCB will attempt the next lowest priority checking method 2 Outside Dewpoint vs Setpoint If an input is set up on the RCB as a Dewpoint sensor the value of this sensor will be compared to the outdoor air dewpoint setpo
18. 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 Set RIGHT for sensors not requiring voltage Set LEFT for sensors requiring voltage EXCEPT CPC 5v transducers _8 SLANI Figure 4 3 Input Type Dip Switches for RCB Board 4 1 2 On Board 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 4 for the location of these points Figure 4 4 Input Board Power Sources To connect to one of the DC power sources simply connect the sensor s power wire to one of the terminals 12 MultiFlex Operator s Guide 4 1 2 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 drawn from all three 5 VDC terminals COMBINED 15 50 milliamps 4 1 2 2 Powering Sensors Requiring 24VAC Off the Power Transform er Some sensors that require 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 a
19. the E2 will delete board 6 and 7 leaving ciated with boards 1 through 5 Move the cursor to the AHU Zone field you wish to as sociate Press MB Select the nameof the Zone applicationyou wish to use Press to confirm 7 2 Associating an RCB witha Zone Application Refer to Section 6 1 Introduction to Zone Control for list of parameters that are automat AHU ARTC lt ANU Controller Bus Node ANU Application AHU Zone ically connected between the AHU Zone and the RCB when associated 1 SETUP AHU F2 SETUP ZONE F4 LOOK UP F5 CANCEL Figure 7 2 E2 Associations Screen After you have added all the RCBs to the E2 network and verified they are communicating properly the next step is to associate them with an Zone application Associating them with a zone is optional but is the easiest way of group ing multiple RCBs so that they use the same set Associating an RCB with a Zone Application The MultiFlex RCB E2 Interface 29 7 3 Viewing the Status Screen Once you have added an RCB to the E2 you will be able to see the status of the RCB board s from the front panel 1 From the Main Status Screen press the MENU key and select Configured Applications 2 Press to select MultiFlex from the menu If multiple RCBs are associated with this Einstein the RCB Summary Screen will be shown To see a single RCB s status sc
20. to the Zone application parameters in the E2 will automatically be written to all RCBs in the zone 18 MultiFlex RCB Operator s Guide RCB Input Property Zone Ap plication Parameter OCCUPANCY STATE The RCB will follow the zone s occupancy sched ule to determine when to use occupied and unoccu pied set points ZONE TEMP ZONETEMP The Zone combines space OUT temperatures for all other rooftop controllers in its zone and feeds this value back to the RCBs ECONOMIZE ECON OK The Zone will send an OK signal to all RCBs to indicate outside air is favorable for opening out side air dampers DEHUM DEHUM The Zone checks zone hu ACTIVE midity and commands RCBs to activate dehu midification Description OCC HEAT OCC HEAT The Zone application OUT sends the values of all oc cupied and unoccupied Eee EOP JCO COOL heat and set points to OUT 3 all of its rooftop unit con UNOCC UNOC trollers HEAT HEAT OUT UNOCC UNOC COOL COOL OUT SEASON SUM WNTR MODE The Zone application no tifies the RCBs of the sea son mode to act in either Summer or Winter The Zone sends the hu midity set point the RCB should use if communica tion with the controller is lost and the unit must op erate in stand alone mode this assumes the RCB has a humidity sensor connected to the board OCC DEHUM FB HUMID STPT Table 6 1 Zone Provided Parameters for the RCB Zone control is covered in
21. 026 1707 Rev 2 13 APR 10 MultiFlex Rooftop Controller Installation and Operation Manual EMERSON e amp EMERSON 3240 Town Point Drive NW Suite 100 Kennesaw GA 30144 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 RCB rooftop control board Table of Contents 1 OVERVIEW OF THE MULTIFLEX 1 1 1 DIFFERENCES BETWEEN THE MULTIFLEX RCB AND THE MULTIFLEX 1 2 20 2202 000 000000000000 1 15 THE RCB S I O
22. 3 are used to set the baud rate To communicate 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 Wiring Types 3 1 4 Setting the Terminating Resis tance 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 endmust be terminated by placing all three termination jumpers in the OUT toward the left edge of the board position All other devices on the daisy chain must be set to the IN toward the center of the board position Figure 3 3 shows the proper terminating resis tance jumper settings for the Einstein and for all T O boards JUMPERS 3 52 NO TERMINATION TERMINATION Figure 3 3 I O Network Termination Jumper Settings The I O Network 9 4 RCB Input and Output 2 2 Setup Mix Temp Temperature probe mounted in the air flow 4 1 The MultiFlex RCB Inputs where the ret
23. B HAND HELD TERMINAL STATUS SCREENG cccscccscsesesssececesesssesececesssaeeeecessuececcesesceeecesesaaeccecessaaeceeeeessaeseeeeees 33 8 2 RCB OPENING SCREENS cccccsssssecesesssececesessscececeseacececesssseeccecessasecceceesseceecsensaececesesesscesesesesuseeecesesuaesececeasaeeeeceseea 34 bee wean cane ocala Su cote ae clade a ev enna 34 Sib STATUS te 35 8 55 RTS ERE ROE a SE EE 37 8 5 1 Control Menit Setpoint 37 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 8 7 42 8 8 SCHEDULING A ee ea i REE 43 89 OVERRIDES isles hats ad ae 43 8210 5 eee 44 45 8122 MISCELLANEOUS 46 Table of Contents MultiFlex RCB Operator s Guide vii 1 Overview of the Multi Flex RCB 26501126 LEGEND 1 INPUT POWER RS485 I O TERMINA 24VAC TION JUMPERS
24. NALOG OUT ANALOG OUT 2 ANALOG OUT 1 Figure 4 7 MultiFlex RCB Analog Output Locations The MultiFlex RCB analog outputs are 0 10VDC points used for controlling variable position economizers mod heat and cool stages and variable speed fans The maximum output current for each point is 10 milliamps Figure 4 7 shows the location of the analog outputs The function of each of the analog outputs must be configured in the RCB system software Table 4 5 lists the devices that may be assigned to the analog output points Description NDF Not defined Use this if the analog out put will remain unused Inverter controlling a variable speed fan Table 4 5 RCB Output Types Analog Outputs 4 3 1 Wiring the RCB Analog Output Points The analog outputs have no hardware based fail safe settings fail safes are set in the board firmware by setting either fan speed on failure or economizer on failure All that is required to connect a device to an analog point is to connect the terminal to the positive wire on the device and the teminal to the negative or ground wire of the device RCB Input and Output Setup 15 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 CODE A and CODE LEDs
25. WER KW or pulse output PULSE CNT CLI Prf DIG ON Proof checking device CL4 Prf OFF for cool stages 1 2 3 or 4 Prf DIG ON Proof checking device HT4 Prf OFF for heat stages 1 2 3 or 4 DIG ON Sail switch for blower OFF fan proof checking SuplTemp Temperature probe mounted in the supply air flow RtrnTemp Temperature probe mounted in the return air flow Table 4 1 RCB Default Inputs Table 4 1 RCB Default Inputs 10 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 RCB Input eer Cnd Prf DIG ON Sail switch for con OFF denser fan proof check ing Frz Stat DIG ON Thermostat switch OFF checking for freezing temperatures at the cool stage evaporator s Enth Swt DIG ON Enthalpy switch used to OFF enable or disable econ omization BypSwtch DIG ON Push button used for OFF occupancy override Smoke In DIG ON OFF Smoke alarm input for system shutdown dur ing fire Table 4 1 RCB Default Inputs 4 1 1 Wiring Sensors to the Multi Flex RCB Wiring an input 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 5 or 12V power terminals 4 1 1 1 An input point on a MultiFlex board consists of two terminals as shown inFigure 4 2 One of
26. al values RCB Hand Held Terminal Status Screens 8 1 When an HHT is plugged into an RCB users may access a Series of screens that display input and output status information Certain control parameters such as offsets setpoints and dead bands may also be changed in these screens The HHT may also be used to initiate cooling heating fan auxiliary and economizer over rides The UP and DOWN keys on the HHT key pad are used to scroll through the screens The DOWN key scrolls forward through the screens and the UP key scrolls backward Some screens will have fields that may be changed using the HHT To change the value in a field press the RIGHT arrow key A cursor will appear in the screen next to the first changeable field in the display Use the UP and DOWN arrow keys to move the cursor to the desired RCB Hand Held Terminal Status Screens field and enter the desired value using the numeric keypad or select an option using the dash key When finished use the UP and DOWN arrow keys to move the cursor off the screen At any screen the 1 key may be used to call up a brief description ofthe screen s function To exit the help screen press any key on the key pad The following sections show the HHT screens for the RCB The MultiFlex RCB Hand Held Interface 33 8 2 5 5 Description from RCB Main Screen This is the screen that first appears w
27. ampers will be CLOSED DmprOpen and DmprClose If the RCB is controling a variable position damper that uses separate motors for opening and closing the dampers DamperOpen 90 the Dmpr Open and Dmpr Close parameters specify how many seconds Dmpr Close 90 of operation it takes the motor to open or close the damper from 0 to Dmpr Change O 100 open This informs the RCB how many seconds to operate the DmprCalTm 0 0 damper motors when a damper percentage change is called for MinAirDelta The Minimum Air Delta is the minimum percentage the variable position damper will remain OPEN at all times in order to meet outside air requirements for the site The damper will never be closed to a position below the Minimum Air Delta value even when called to be CLOSED DmprCalTm Because the RCB has no way of directly verifying the cor rect damper opening percentage once per day the RCB will calibrate the variable position damper by fully closing the damper and re open ing it to the current position The Damper Calibration Time parameter sets the time of day each day this calibration will occur Enter the de sired time in 24 hour format This screen allows you toset the proof checking delays forheat cool and air fan proofing if used All delays are entered in MM SS format If a proof input reads a failure in a heat cool or fan for an amount of time ReadDly OFF HT 00 30 00 30 longer than the read delay it will attenpt to reset the fa
28. ardware setup should be necessary 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 120 208 240 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 4 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 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 RTU in conjunction with other MultiFlex boards Refer to your sitecontroller s manual for VA ratings of the other I O boards that may be powered by one of these transformers Center MultiFlex 88 168 168 16800 15 24 Table 2 2 Device Power Requirements 2 3 2 MultiFlex RCB Power Wiring The MultiFlex RCB boards can be connected to any of the center tapped transformers men tioned in Table 2 1 provided the terminal of the board is connected to an Earth ground A center tapped transformer may power both center tapped and non center tapped devices at the same time as long as none of the non center tapped MultiFlex boards are old style MultiFlex boards
29. ation 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 RCB Input and Output Setup 13 State of Normally Closed N C Contacts on MultiFlex Relay Points Loss of Fail safe Loss of Switch Table 4 3 Output Board Fail Safe Switch Settings when Contact is Wired Normally Closed N C State of Normally Open N O Contacts on MultiFlex Relay Points Loss of Communi cation Table 4 4 Output Board Fail Safe and Switch Settings when Contact is Wired Normally Closed N O Fail safe Switch Loss of Power 4 2 3 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 2A Each relay is fused with a 2A fast blow 5mm x 20mm fuse Bussman 2 or equivalent 14 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 4 3 Analog Outputs WOR MOAN MSM MOOR W DETAIL Ok aii ANALOG OUT 4 A
30. caecaeeaeeaeeaeeneeneens 19 6 2 1 2 Occupied Unoccupied Setpoints and Summer Winter Setpoints 20 0 2 2 Low Supply Temp se teu aves Biss eh 20 6 9 20 0 3 4 Two Speed Air Fan Strate gy NEN 20 0 3 2 Variable Speed Fan EE RESE EA ES 21 6 3 2 1 Staged VS Control 21 6 3 2 2 Differential VS Fan Control e aereis 21 6 4 DEHUMIDIFICATION AND HUMIDIFICATION 22 6 41 Dehumidific ti n Control 6 4 1 1 Zone 6 4 1 2 Stand Alone Dehumidification 6 4 1 3 Dehumidification Low Temp Lockout 6 4 2
31. ccess RCBs from UltraSite32 or InSite and to back up restore and offline program RCB configuration along with E2 site configuration Communication between E2 and an RCB takes place over the RS485 I O Network Follow the instructions in Section 3 The I O Network to connect the RCBs to the E2 I O Network Then follow the instructions in this chapter to set up the RCBs 7 1 Adding Deleting an RCB 7 1 1 Adding an RCB Before E2 will canmunicate with an RCB it must be added as an IO board This task is per 28 MultiFlex RCB Operator s Guide formed in the Controller Setup screen To access this screen Log in to the E2 Press the MENU lt gt key amp Press to navigate to the System Configuration Menu amp Press to navigate to the Network Status Setup menu Press Connected I O Boards amp Controllers Enter the number of RCB boards that will be networked with this Einstein in the RCB Controllers field 02 15 05 ULI BX 408 Unit 1 CONNECTED 1 0 CAPS 12 05 19 ALARM Unit Number Echelon Subnet gt THIS 1 1 Unit Name Top Controllers lt 100 gt Figure 7 1 Controller Setup Screen If you have properly set up all MultiFlex RCB boards on this E2 s I O Network you can go view the status of the I O Network press F10 or the key to go back tothe menu then press EB Controller Status If E2 and the RCB boards are communicating th
32. centage from PID control is used differently depending on whether the rooftop unit uses staged or modu lated heating and staged or modulated cooling 6 2 1 1 When heating or cooling is staged the PID percentage is used to determine how many stages should be active Multiple stages are always activated in a fixed sequence beginning with stage 1 and continuing on to the next high Staged Heating and Cooling Temperature Control est stage number until all stages are ON Stages are deactivated in reverse order beginning with the highest numbered stage and continuing back wards to stage 1 As the PID percentage climbs from 0 to 100 the RCB activates stages at even intervals determined by the total number of stages For example if the RCB is in heating mode and there are three heating stages as the PID per centage climbs from 0 to 100 it will bring on stage 1 at 33 stage 2 at 67 and stage 3 at 100 When stages are ON they are turned OFF only when the PID percentage falls below the next lowest PID interval In the previous exam ple three heating stages are turned on at 33 67 and 100 When all three stages are ON stage 3 will deactivate when the PID falls below 67 stage 2 will deactivate below 33 and stage 1 will deactivate when the PID falls to 0 Table 6 2 gives a reference of PID ON and OFF percentages based on the number of heat or cool stages PID ON PID OFF 5
33. characterized by no green power LED in theupper right corner of the board If an old style MultiFlex shares the same center tapped transformer as a device that Powering the MultiFlex RCB Board uses the center tap the old style MultiFlex will be damaged Figure 2 4 shows how to wire a non center tapped device to a center tapped transformer 120 208 240 VAC BLUE NEUTRAL PRIMARY SIDE SECONDARY SIDE Figure 2 4 Wiring Non Center Tapped MultiFlex Boards to Transformers With a Center Tap In addition the MultiFlex RCB boards can be powered by one of the 50VA or 75VA non center tapped transformers listed in Table 2 1 on page 4 Figure 2 5 shows how to wire the trans formers to the MultiFlex boards You may also tie one side of the secondary but not BOTH sides to an earth ground pro vided none of the boards powered by the same transformer are old style MultiFlex boards YELLOW e 110 220 VAC CLASS 2 POWER 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 5 Non Center Tapped Transformer Wiring Mounting and Powering 5 2 3 3 Wire Types and Maximum Dis tances For powering I O boards use only the listed wire types from Table 2 3 Three conductor non shielded cables are the recommended wire fo
34. d 6 4 1 3 Stand Alone Dehumidification Dehumidification Low Temp Lockout To prevent overcooling when cool stages are being used for dehumidification the RCB may be programmed with a dehumidification low temperature lockout setpoint If the control tem perature for the RCB falls below this setpoint dehumidification will be shut down and locked out until the control temperature rises five 5 degrees above the setpoint 6 4 2 Humidification Control RCBs humidify by activating and deactivat ing a humidifier output on the RCB Unlike dehumidification an AHU Zone cannot be used to control humidity all humidity control is handled completely by the RCB and requires a humidity sensor to be connected to one of the RCB s inputs The RCB uses cut in and cut out setpoints to control the humidity When the measured humidity is below the cut in set point the RCB will activate the humidification device The device will remain ON until the humidity rises above the cut off set point Outside Air Control 6 5 Outside Air Control The RCB may be programmed to control two position or variable position outside air dampers on a rooftop control unit The position of the dampers may be determined by any or all of the following factors Inside Air CO2 Levels dampers be opened to allow fresh air when high CO2 levels are present e Economization under optimal conditions using outside air during cooling Smo
35. d Curtailment Setpoint Reset and Opti mum Start Stop will not be available 6 8 Sensor Failures In many cases RCBs and AHU Zone appli cations can compensate for sensor failures by substituting other sensor values This allows the RCB systems to continue operating as close to normal as possible until the failed sensors can be fixed or replaced Space Temp Failure If a space temperature sensor on an RCB fails the RCB will substitute the value of the return air temperature sensor as the control value If this fails or is not present and the RCB is connected to a Zone application in an E2 the RCB will use the zone temperature value sent down from the E2 as a replacement value When the space temperature sensor fails a failure alarm will be generated and sent to the Alarm Advisory Log Qutside Air Temp Failure Failure of the outside air temperature sensor affects Economization only if Temperature Comparison is being used as the method of economization enabling In this case the RCB will attempt to find a different means of econo mization checking and if it cannot find a valid one economization will be disabled for stand alone operation Mixed Air Temperature Failure If the RCB has variable position dampers it will use the mixed air temperature sensor as its control input for damper control If the mixed air temperature sensor fails it will substitute the supply air temperature sensor as its control value a
36. de during the sum mer months and in Auto mode during the winter months based on the season passed to the RCB from the E2 controller If desired activation and deactivation delays may be set up for the RCB application for both heating and cooling mode 6 3 1 Two Speed Air Fan Strategy If the RTU controlled by the RCB has a two speed fan the fan speed is determined by a parameter called the switch stage The number specified in the switch stage parameter is the number of the stage that when activated or deac tivated will switch the fan from low speed to high speed or from high speed to low speed If the fan is inactive or active in Continuous mode and no stages are ON the fan will begin by operating at LOW speed until the stage num ber equal to the switch stage parameter value is activated When this stage is activated the fan will switch to HIGH speed and remain at this speed until the switch stage is deactivated Delays may be set for fan activation and for speed changes 026 1707 Rev 2 13 APR 10 6 3 2 Variable Speed Fan Control An RCB may control variable speed fans using one of two different strategies staged which varies the fan speed based on individual fan speed setpoints for each heat and cool stage or differential which varies the fan speed to maintain a constant differential between the return air and supply air temperatures 6 3 2 1 Staged VS Fan Control When the Staged VS fan control strateg
37. e HHT is unplugged CL 75 0 79 0 MinSupI Tmp If desired you may specifya minimum supply temperature MinSuplTmp 0 0 set point If the supply temperature falls below this value cool stages will be deactivated to prevent overcooling This screen shows the minimum ON and OFF times for heat and cool 5 mode activation When heating or cooling mode first begins Min ON OFF Times will wait until the appropriate ON 217 elapses ON OFF fore turning on the first stage If heating or cooling mode is active and HT 03 00 01 00 the RCB determines heating or cooling mode should end it will wait CL 03 00 02 00 for the OFF delay before deactivating all stages NOTE These delays do NOT apply to interstage activations In other words the RCB does not apply the delay to EACH stage activation or deactivation only the beginning and ending of heat or cool mode Control Menu The MultiFlex RCB Hand Held Interface 37 Road Map from Description RCB Main Menu occ UNO Dehum 60 50 Cutoff 50 4 DehumCoolStg 1 occ UNO Hum 30 20 HumCutOff 30 RevVals HtAct Low Supply Temp Enable NO SetPt 59 0 Delay 10 M occ UNO 2 0 2 0 60 0 10 Econ Delta DewPtSP OATDLta 38 MultiFlex RCB Operator s Guide Dehum OCC UNO The dehumidification occupied and unoccupied set points are used in dehumidification control only ifthe RCB is not asso ciated with a Zone application in E2 that controls dehu
38. g 2 CONTROL from the main menu takes you to the Control or press Menu which is used to change input and output definitions change set CONTROL MENU points program or change schedules and other system functions 1 SETPTS 2 INPUT Pressing F2 at any time will cause this screen to appear screen 3 OUTPUT 4 MORE SETPTS Program and change control set points Select 1 INPUT View and or change the assignment of RCB inputs 1 through 16 More Options press 4 OUTPUT View and or change the assignment of RCB relay outputs 5 SCHED 6 OVRRD 1 through 8 and analog outputs 1 through 4 7 RESET 8 PID MORE Select this opion to view the second part of the meny to view 9 MISC or select options 5 through 9 Select 5 SCHED Program ON OFF schedule times in the RCB s stand alone schedule OVRRD Override RCB inputs relays and analog outputs RESET Reset device runtime totals alarms or reset all set points to default PID View and or change heating cooling and other PID constants MISC General functions including changing time and date and other set points F2 from any 8 5 1 Control Menu Setpoints Road Map from Description RCB Main Menu This screen shows the occupied and unoccupied heat and cool setpoints used by the RCB These set points may be changed in this screen but occ UNO if the is associated with a zae the E2 will overwrite the set points HT 71 0 65 0 back to their original values when th
39. greater detail in the E2 controller s user manual P N 026 1610 and in the E2 on line help 026 1707 Rev 2 13 APR 10 6 2 Temperature Control In its most basic form temperature control in an RCB reads a space temperature input value compares it to the active heating or cooling set point and activates or deactivates heating or cooling stages in an effort to satisfy the setpoint The majority of user setup that must be done in Temperature Control involves defining differ ent setpoints in the RCB s parent zone for use in occupied unoccupied summer and winter modes and setting up the operating characteris tics of the heating and cooling stages 6 2 1 Setpoints There are two active setpoints in an RCB a cooling setpoint and a heating setpoint both of which are supplied by the zone from the E2 In general when the input rises above the cooling setpoint cooling mode begins and when the input falls below the heating setpoint heating mode begins RCBs activate stages using PID Control which controls the output asa percentage of total heating or cooling capacity determined by the size of the difference between the space temper ature and the set point as well as the amount of time the temperature has been above set point The primary determiner of the PID percent age is the throttling range parameter for heating and cooling control Throttling range is the num ber of degrees The heating or cooling output per
40. hen the HHT is plugged into the RCB It shows the controller type CPC part number and version number The MULTIFLEX RCB last line of this screen will show any alarm conditions active for the RCB TYPE 810 3075 board If no alarms are active the last line will prompt the user to press VER 1 10 01 the DOWN ARROW key to continue PRESS This screen shows the setting ofthe board s network address and baud rate dip switches You may use this screen to quickly double check the DIP SETTINGS network addresses of all your RCB boards during installation and trouble Address 1 shooting Each RCB should have a unique address number and all boards Baud 9600 should be set to 9600 baud Press the DOWN ARROW key again to go to the Main Menu 8 3 RCB Main Menu Road Map Description from RCB Main Menu The Main Menu has two options To view the status of the RCB inputs out puts and other system functions choose 1 STATUS MENU To pro MAIN MENU gram the RCB or change set points choose 2 CONTROL MENU 1 STATUS MENU 2 CONTROL MENU Select 1 34 MultiFlex Operator s Guide 026 1707 Rev 2 13 APR 10 8 4 Status Menu Road Map from Description RCB Main Menu 1 press 1 from any screen The Status Menu allows you to viewcurrent input and output values run times and other status Pressing F1 on the HHT at any time will cause STATUS MENU this screen to appear 1 2 OUTPUT INPUT
41. i able position analog dampers The RCB controls economization by first determining whether the outside air conditions are favorable for bringing in outside air see Sec tion 6 5 2 3 Economization Enabling Strategy If the air is not favorable for economization the RCB will close the dampers If the air is favor able for economization the RCB will use the dampers like a preliminary stage of cooling opening them first when cooling is first called for and then activating more cool stages only if necessary to maintain the set point 6 5 2 1 Operation of Two Position Dampers During Economization Two position dampers are set to the OPEN position when economization is enabled and the RCB is in cooling mode The damper will remain OPEN until cooling is not required or until the RCB determines the outside air is not favorable for economization at which time the dampers will be set to the CLOSED position 6 5 2 2 Operation of Variable Position Dampers During Economization When economization is enabled and the RCB is in cooling mode the RCB controls the position of the damper using a PID algorithm using a mixed air temperature sensor mounted where the sensor may measure the mixture of outside air and supply air and a mixed air temp setpoint The RCB opens and closes the damper incre mentally to attempt to maintain the mixed air temp setpoint The RCB will close the damper when the mixed air is below the set point to
42. ill generally turn on the dehumidification device first if available and then activate stages of cool up to a user defined maximum number of cool stages to be used for dehumidification The specifics of how an RCB determines when to dehumidify depend on whether the RCB is operating as part of a zone or stand alone 6 4 1 1 Zone Dehumidification Control When the RCB is part of an AHU Zone application in the E2 the Zone will determine if dehumidification is needed and send a digital command to the RCB to tell it to begin dehumid ifcation The RCB will then cycle on its dehu midification device output if available After a programmed delay if dehumidification is still necessary a stage of cool will cycle ON The RCBs will continue cycling cool stages ON in this manner until 100 of the cool stages desig 026 1707 Rev 2 13 APR 10 nated for use dehumidification are active or until the setpoint is met If the setpoint is met in the AHU Zone application the Zone will com mand the RCB to stop dehumidifying and the RCB will switch OFF the dehumidifier output and cycle OFF the cool stages 6 4 1 2 If the RCB is not operating as part of an AHU Zone or if the RCB is part of a zone but you want the RCB to handle dehumidification by itself it must be equipped with a humidity sensor The RCB will follow its own pro grammed dehumidification set points and oper ate dehumidification devices and or cool stages as neede
43. ilure or if three 00 30 00 50 resets have already been attempted and the failure still exists the stage 00 30 00 30 or fan will be disabled Different delays may be set for readingthe ON and OFF states HT Refers to proof inputs for all heat stages Fan CL Refers to proof inputs for all cool stages Fan Refers to the fan proof input Control Menu The MultiFlex RCB Hand Held Interface 41 8 6 Inputs Road Map from Description RCB Main Menu 2 2 The sixteen screens under the Inputs menu selection are where you press UP must specify the functionof the sixteen input points on the RCB board ARROW and Terminal 0 1 Terminal No This read only field showsthe number of the pointreferred DOWN ARROW SpacTemp to in this screen keys to cycle Type TEMP Name The Name field is where you must skect the function of the input through input Offset 0 00 Refer to Table 4 1 on page 10 for a full list of inputs screens 1 16 Type The Type field is largely set automatically by the default sensor type that matches the input type you select in the Name field For ex ample if an input is set as proofinput the Type will automatically be set to DIG ON OFF Most selections in the Name field only have one valid setting for the Type field but there are some exceptions TEMP SENSORS Any temperature sensor SpacTmp Mix Tmp etc defaults to a type value of TEMP indicating the se
44. ime reset Run Cool1 O Hrs 0 00 of Time time stats for heat and cool stages 1 through 4 are shown even if they Cool2 Hrs are not defined or used for the RTU controlled by the RCB Each run 0 00 of Time time shows both the number of total runtime hours since last reset but the percentage of time overall the stage or device has been ON since last reset Use the DOWN ARROW keys to scroll through the runtime screens The order is 1 Cool Stages 1 and 2 2 Cool Stages 3 and 4 3 Heat Stages 1 and 2 4 Heat Stages 3 and 4 5 Air Fan and Condenser Fan Choosing 4 MISC shows three status items Ctrl Temp 73 0 Ctrl Temp The current temperature being used as the control tempera ture This is typicallythe same value as the space tempinput unless the Occupancy YES space temp sensor has failed or is unavailable in which case it may be DehumStages 1 the supply temp or zone temp sent from the associated E2 Zone appli cation Occupancy If YES the RCB is using occupied set points if NO the RCB isusing unoccupied setpoints This is determined by theschedule followed by the Zone to which this RCB is associated or by the RCB s own back up schedule if the RCB is in stand alone DehumStages This field shows the number of cool stages available for dehumidification control 36 MultiFlex Operator s Guide 026 1707 Rev 2 13 APR 10 8 5 Control Menu Road Map from Description RCB Main Menu 2 Selectin
45. ing stage runtimes When this field is set to ON it will activate and deactivate heating andcooling stages based on the number of hours run time the stages have been operating When this field is set to OFF it will sequence the heatingand cooling stages inorder always beginning and ending with stage 1 OccOvrd You may use thisfield to manually override the RCB occupan cy state Select ON to override the state to occupied or OFF to override it to unoccupied If you wishto cancel thisoverride unplug the HHT or manually set this field to NOR PrfWtDly The Proof Wait Delay is theamount of time the RCB will wait after a proof failure before attempting to reset the proof failure by reac tivating the device Enter the desired time in MM SS The Daylight Savings Time screen allows you to customize when you want daylight savings time to begin and end forthis RCB Thedefaults used by the United States the 1st Sunday of April and the last 5th Sunday of October If you wish to choose different start months weeks or days enter them on this screen The MultiFlex RCB Hand Held Interface 47
46. int If the dew point is below the set point economization will be enabled If no dewpoint sensor is present on the RCB or if the sensor has failed it will attempt the next lowest priority checking method 3 Enthalpy Comparison If the RCB has inputs for outdoor humidity indoor humid ity and outdoor air temperature the RCB will calculate the enthalpy of the outdoor and indoor air compare the two values and if the outside air enthalpy is lower economization will be enabled If the RCB cannot calculate 026 1707 Rev 2 13 APR 10 either outdoor or indoor enthalpy due to lack of the necessary inputs orby sensor failure it will attempt the next lowest priority check ing method 4 Dewpoint Failsafe If the RCB has no dew point probe but it does have an input desig nated as an outdoor air temperature OAT sensor it will use the OAT value as a fail safe dewpoint and compare the OAT value to the dewpoint setpoint If the outside air temperature is lower than the dewpoint set point economization will be enabled If the outside air temperature or the dewpoint fail safe set point are not present the RCB will attempt the next lowest priority checking method 5 Comparison If the RCB has input designated as an outdoor air tempera ture OAT and it cannot perform the dew point failsafe comparison it will enable economization based on a straight compari son between the inside air temperature a
47. is screen will show the RCB boards as Online If not they will be shown as Offline 026 1707 Rev 2 13 APR 10 7 1 2 Deleting points occupancy schedules summer winter seasonal schedules etc To associate one or more RCBs with Zone applications you will first need to create Zone applications in the E2 BX if you have not already done so press MENU 6 for we Add Delete Application to add zones 2 Press the MENU lt To remove from the 2 or Einstein amp 3 Press to navigate to the System Configuration Menu Log in to the E2 if not already logged in Press the MENU lt amp 4 Press to navigate to the Network Status Setup menu amp Press to navigate to the System Configuration 5 Press Connected I O Boards amp Controllers Menu 6 Change the number of RCB boards in the RCB Control amp lers field to the correct number of boards Press to navigate to the Network Status Setup Press Associations This screen will list all RCBs RTUs and AHU applica tions in the E2 Figure 7 2 Each of these will have When RCBs are deleted in this way E2 will always delete the highest numbered RCBs first Therefore if you have seven RCBs numbered field under the AHU Zane column where youtiay 1 7 and you change the number of RCBs to choose the Zone application the controller may be asso five
48. ke Fire Alarm shut dampers when smoke alarm occurs Variable Position Damper Methods of Control For variable position outside air dampers the RCB supports two different methods of con trol e Analog 0 10VDC output The position is con trolled from an analog output point set up as Out Dmpr on RCB that varies the voltage from 0 10VDC corresponding to the 0 100 PID output range Damper Open Close motors The damper is con trolled by two separate motors one that opens the damper DmprOpen and another that closes the damper DmprCls Digital outputs activate the mo tors for measured lengths of time to achieve the proper damper position 6 5 1 CO2 Control When a 2 sensor input is present on the RCB control board the outside air damper may be used to bring fresh air into the building to reduce CO2 levels The CO2 sensor s value is compared to the RCB s CO2 setpoint If the reading exceeds the set point e The damper will OPEN and remain open until the CO2 value drops below the set point for two position dampers The damper will open and modulate its posi tion based on a PID comparison of the CO2 sensor reading and the CO2 setpoint for variable position dampers Software Overview 23 6 5 2 Economization Economizer dampers onrooftop HVAC units are used to bring outside air into the building for use in cooling The RCB supports control of two position outside air dampers as well as var
49. ked out until the control temperature rises 5 degrees above this set point AirFan Delays The Air Fan ON OFF delays are the amount of time the RCB will keep the air fan OFF after the first heat or cool stage turns ON or ON after the first heat or cool stage turns OFF This is typically used during heating mode to delay fan activation to prevent blowing cold air and to purge warm air from the plenum after heat stage deacti vation Use this screen to specify what type of heat cool and fan devices will be controlled by this RCB Fan Select 1 Speed 2 Speed Var Speed or No Fans Heat Select Staged if using staged heat or Mod if using modulated heat Cool Select Staged if using staged cool or Mod if using modulated cool Low2Hi HT CL Stg The two speed fan cooland heat switch stageparam eters are used only if a two speed fan is present The numberrepresents the heat or cool stage number that when activated will switch the fan from LOW to HIGH speed and when deactivated will switch the fan from HIGH to LOW speed Youmay choose separate switchstages for both heat and cool modes Mod HT CL The SwMod parameters are used if modulated heating and cooling are used in conjunction with two speed fans This parameter represents the mod at which the fan will transition from LOW to HIGH speed if the PID is increasing or from HIGH to LOW speed if the PID is decreasing SpinDwnDly The Spin Down Delay is the amo
50. l beunaffected by a loss of communication with E2 6 7 3 Economization Stand Alone Operation The RCB will continue economization as normal if it has the necessary inputs enthalpy switch OAT etc Refer to Section 6 5 2 Economization for more information about economization checking methods and priorities 6 7 4 Summer Winter Season and Occupied Unoccupied Sched uling The RCB itself does not recognize summer winter seasonal changes all shifting of set point during the summer and winter seasonal change is handled by the E2 The RCB will continue stand alone operation using the last group of occupied and unoccupied heating and cooling set points sent to it by the E2 until communica tion is restored For occupied unoccupied building time scheduling the RCB uses a separate fallback schedule The fallback schedule is a simple seven day occupancy schedule with up to two usable ON OFF schedule pairs per day This schedule is separate from any time scheduling used by the E2 and must be programmed sepa rately if you wish to use it If the fallback schedule is not programmed and the RCB loses communication with the E2 it will operate in occupied mode 24 hours a day 026 1707 Rev 2 13 APR 10 6 7 5 Other Stand Alone Operation The RCB will continue operating the revers ing valves if present as normal Other control features that rely on communication with zones or other Einstein applications such as Demand Shed an
51. ly two analog outputs for use only with VS fans and economiz ers The RCB also features a more sophisticated HHT interface and updated algorithms for con trolling heating cooling dehumidification and air quality 1 1 1 2 RCB s I O Points The compact size of the RCB allows techni cians to easily field mount the RCB in a rooftop unit or enclosure close to it allowing for easy local connection of sensors and transducers The board has sixteen analog inputs with default configurations pre loaded for quick connection to space temperature sensors supply and return air temperature sensors and fan and compressor proofs Its eight relay outputs rated 2 0 amps max are used for activating and deactivating fans heat and cool stages economizers and other systems or devices Its four analog outputs may be used for air damper modulated heat and cool control and variable speed fan control 1 3 Independent System trol The RCB can control a rooftop unit indepen dently without the need of a central controller such as CPC s E2 BX Building Controller However the RCB is designed to interface with an E2 to allow it to work with other RCBs Overview of the MultiFlex RCB 1 together to control large zones Networking the RCB to a central controller also allows you to view status on E2 amp UltraSite32 status screens report alarms and log point values The RCB s configuration can be pro grammed eithe
52. m for all RCBs in the zone or if the RCBis operating in stand alone mode The indoor humidity input value is compared to the active dehumidification set point to determine the dehumidification PID percentage Cutoff If the RCB has a dehumidification device an output defined as Dehumidifr the Dehum CO parameter determines the PID percent age at which the output will turn ON and OFF If the PID percentage climbs above the Dehum CO the output will turn ON If it falls below the Dehum CO the output will turn OFF DehumCoolStg This parameter defines how many cool stages for the rooftop unit may be activated during dehumidification The RCB al ways uses the lowest numbered stages for dehumidification for exam ple if the RTU has three cool stages and this parameter is set to 2 the RCB will only use cool stages 1 and 2 during dehumidification Hum OCC UNO The humidification occupied and unoccupied set poirts are used in humidity control The indoor humidity input value is com pared to the active humidification set point to determine the humidifi cation PID percentage HumCutOff The Hum CO parameter determines at what PID percentage the humidifier an output defined as Humidifr will turn ONand OFF If the PID percentage climbs above the Hum CO the output will turn ON Ifthe PID percentage falls below the Hum the output will turn OFF RevVals If the RCB is controlling a reversing valve this parameter de termines when
53. n Select Fan and Heat Cool types In screen C1 General choose the type of fan to be controlled in the Air Fan Type feld Select whether your heat and cool will be STAGED or MOD modulated in the Cl Output Type and Ht Output Type fields Enter setpoints Scroll through all parameters in C2 Setpoints and set up your low supply temp set 32 MultiFlex RCB Operator s Guide points stage ON and OFF delays and other desired settings Set humidity dehum control setpoints and heat cool setpoints If the RCB is associated witha zone the C3 Inputs screen will show the zone output connections that provide the RCB its heat cool set points and occupied dehum setpoint If this RCB will not be associated with a zone you will need to enter these here Setup RCB Inputs In C4 RCB Inputs setup each RCB input point that has an input connected to it Refer to the on line help and also Section 4 1 The MultiFlex RCB Inputs for more information Setup RCB outputs In C6 RCB Outputs setup each RCB output point that has a device connected to it Refer to the on line help and also Section 4 2 The MultiFlex RCB Outputs for more information Set PID throttling ranges In C8 PID check the default throttling ranges for all PID controlled RCB systems and verify they are the throttling ranges you wish to use Simply put throttling range is the num ber of engineering units between a PID tput of 0 and a PID output of 100 For exam
54. nd 2 This can only be done with sensors that keep the 24VAC signal isolated from its DC output signal such as CPC s Dewpoint Probe P N 203 1902 If the output signal is not isolated from the 24VAC input you must use a separate trans former 4 2 The MultiFlex RCB Outputs RCB OUTPUTS 1 8 Figure 4 5 MultiFlex RCB Output Locations The MultiFlex RCB has eight relay outputs for connection to all outputs that are typically present for a rooftop unit Figure 4 5 shows the location of the RCB outputs and Table 4 2 026 1707 Rev 2 13 APR 10 describes the devices that can be assigned to these points The relay output type and function for each point must be programmed in the RCB software by the installer Description Heat 1 Heat stages 1 through 4 Heat 4 Cool 1 Cool stages 1 through 4 Cool 4 Condenser fan for cool stages Single speed blower fan 2S Fan Lo Low speed stage of a two speed blower fan 2S Fan Hi High speed stage of a two speed blower fan VsContact Contactor for activating a variable speed blower fan Alarm Dry contact that closes when an RCB alarm occurs Heat Cool Reversing Valve Dehumidifr Dehumidification device desiccant wheel Two position outside air damper Dmpr Open Motor that opens variable position damper DmprClose Motor that closes variable position damper Table 4
55. nd the outside air temperature If the outside air temperature is lower than the inside air tem perature economization will be enabled If there is no outside air temperature sensor or if the sensor has failed the will attempt the next lowest priority checking method 6 E2 Zone Enable If the RCB has none of the necessary inputs to perform economization checking methods 1 through 5 in the list above but the RCB is part of an AHU Zone the RCB will read the value of the ECONO MIZATION output from the AHU Zone and enable economization when the zone says to enable it The Zone must be programmed with its own method of economization checking refer to the E2 user manual and on line help for AHU Zone application setup instructions Note that the AHU Zonesignal to economize is the LOWEST priority economization checking method If an RCB has the capabil ity of performing any of the higher priority methods it will use these methods and ignore the AHU Zone 7 Economization If the RCB cannot per form any of the other six methods of econo mization it will disable economization and leave all dampers in the CLOSED or mini mum position 6 5 3 Smoke Detection The RCB may be programmed with a Smoke Detector input which accepts a dry contact digi tal signal from a smoke alarm or a building con trol network When the smoke detector contact closes to indicate smoke ha been detected all of the RCB s heating cooli
56. nd continue economization If neither the Sensor Failures mixed air temperature or supply air temperature sensors are available economization will be locked OFF and the damper will be closed until the sensor failures can be addressed Humidity Failure Under normal conditions the RCB dehumid ifies when the zone application sends a signal to dehumidify As long as the RCB receives this signal from the zone application any failure of an on board humidity sensor will have no effect since this sensor is not being used as the direct control value When communications with the zone appli cation are lost the only way an RCB may dehu midify without help from the zone application is if a humidity sensor is present on the board itself If no sensor is present or if the sensor has failed dehumidification will not take place Software Overview 27 7 MultiFlex RCB 2 Interface The MultiFlex RCB is capable of communi cating with an E2 version 2 10 or above Using MultiFlex RCB boards with a central E2 offers several benefits over simple stand alone control including Reporting of RCB related alarms in the Alarm Ad visory Log The ability to log RCBinputs in anE2 logging group The ability to share outside air temperature values and control motor room temperature by sharing in put values between the RCB and the E2 Remote access to RCB status and programming from the E2 front panel The ability to remotely a
57. ng and fans will be over ridden OFF and the outside air damper will be closed 6 5 4 Priority When Economization CO2 Control and Smoke De tection Are Used Together When both CO2 and Economization control are used together in the same RCB it will con trol a two position damper using OR logic OPEN if one or both require it to be open CLOSED if both do not require it to be open Variable position dampers will be controlled based on which control calls for the highest per centage In other words if the damper needs to be set to 60 to satisfy CO2 fresh air require ments and 40 to satisfy the mixed air tempera ture setpoint the damper will be opened to 60 In any case if a smoke detector input is pres ent on the RCB notification of a smoke alarm overrides the outside air dampers to the CLOSED position 6 6 Reversing Valve Control The RCB supports the control of a heat and cool reversing valve These valves may be wired to any auxiliary output on an RCB designated as a reversing valve or Rev Valve Reversing Valve Control Software Overview 25 The reversing valve output be config ured to activate during heating mode HtAct or cooling mode ClAct If set for HtAct the relay will energize only when heat is active and is de energized during cool or idle periods Like wise if set for ClAct the relay will energize only when cool is active and de energize during heating mode or idle In o
58. nsor is a CPC temperature sensor However if using LM235 based temp sensors this field may be changed to LM 235 TMP KW INPUT The KW Input input type may be set to either POWER KW analog 0 5 VDC watt transducer PULSE CNT pulse accumulation type KWH input Offset The Offset is added to the raw value of this sensor to correct known errors in the reading 8 7 Outputs Road Map from Description RCB Main Menu 2 3 The six screens under the OUTPUTS menu selection are where the func press UP tions of the eight relays and the four analog outputs on the RCB are ARROW and 1 specified DOWN ARROW 2 Out 1 8 The through Out 8 fields specify the functions of outmits keys to cycle 1 1 through 8 Refer to Table 4 2 on page 13 for a list of output types and through relay out 2 their functions put screens 1 2 Analog Out 1 2 3 and 4 The Analog Out 1 4 screens where and analog output Analog Out 1 the analog output types are chosen and the min max voltage parameters screens 1 4 Name VS Fan are specified Refer to Table 4 5 on page 15 for a list of output types MinV 0 00 0 00 and their functions The MinV and MaxV parameters set the minimum and maximum volt ages for this analog output when the percentage values are 0 and 100 respectively The output scales its voltage based on the values of these two parameters so that it begins on the MinV at 0 and increases linearly to MaxV as it goes to 100
59. o No the reset will be complete Reset All Runtimes when executed will reset all stage and fan runtimes at the same time The MultiFlex RCB E2 Interface 31 7 4 Setup Screens 62 15 05 408 Unit 1 ggg Use rl to Select Tabs SETUP C1 General C2 Setpoints Inputs C4 RCB Inputs 5 Outputs C7 Schedules CO Aux Setup Multiflex RCB G 9 10 9 199090 Single Speed STAGED Ht Output STAGED F3 EDIT 4 STATUS F5 CANCEL Figure 7 5 RCB Status Screen Even when associating the RCB with a Zone application there are many setup tasks that must be performed for each individual RCB using the RCB setup screens To access the RCB Setup Screens navigate to the RCB s Status Screen and press 5 Setup A complete description of each parameter in all of the RCB setup screens may be accessed by highlighting the parameter and pressing the HELP key Use the and keys to scroll through the different screens Technically when setting up an RCB you should go through each screen to check the func tion of each parameter and determine if you will need to change the value to accommodate the way you want the RCB to operate In general here are some things most users will need to do in these screens to set up your RCB Name your application In screen C1 General enter a name in the Name field that describes the RCB s basic function and locatio
60. p the date in synchronization with its own date time information If Time 12 00 00 operating the RCB in stand alone mode you may want to change this OccOvrd 10M date to the current date Enter the desired date in MM DD YY format KWPerPulse 100 Time The current timekept bythe RCB Itis not necessary to set this with the HHT if the RCB is part of an E2 Zone application since the E2 will keep the time in synchronization with its own date time information If operating the RCB in stand alone mode you may want to change this date to the current date Enter the desired time in 24 hour HH MM SS format OccOvrd If the RCB will be using space temperature sensors with built in occupancy override buttons the OccOvrd field is the amount of time a user initiated occupancy override will last Enter the desired amount of time in minutes KWPerPulse If using a pulse accumulator style KW transducer this pa rameter sets the number of KW represented by each pulse your transducer s specifications for the correct value and enter it in this field EngUnit The EngUnit field determines how pressure values are dis z played in the HHT Select English for bars or Metric for pascals EngUnit English empUnit TempUnit field determines how temperature values TempUnit Deg F displayed in the HHT Select Deg F for Fahrenheit or Deg C for Cdsius SpChgRate 0 0 SpChgRate If using potentiometer based
61. ple in heating control if your heating setpoint is 69 F and your throttling range is 3 the proportional mode of PID begins at 0 when the input is equal to the setpoint 69 and gradually climbs to 100 as the input falls to three degrees F below setpoint 66 The Throt tling Range is the primary means of setting up PID control behavior In general larger values of the throttling range result in slower reactions to input changes Define alarm notice preferences Scroll through the parameters in C9 Alarms and set the preferences for alarm notice delays types priorities etc Refer to the on line help for the function of each setting 026 1707 Rev 2 13 APR 10 8 MultiFlex RCB Hand Held Interface The MultiFlex RCB Hand Held Terminal interface allows you to viewstatus of the rooftop HVAC systems and configure setpoints directly on the board If you are using RCBs separate from a central E2 system the Hand Held Termi nal will be the only programming interface you may use IMPORTANT If the RCB boards are con nected to a parent E2 do not use the Hand Held Terminal to make permanent configura tion changes Changes made to an RCB via the Hand Held Terminal are designed to be tempo rary for units connected to an E2 The parent controller does not recognize any configuration changes made by the HHT when the HHT is unplugged from the RCB E2 will change all parameters changed with the HHT back to their origin
62. r 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 Power Wiring Types 14 AWG Belden 9495 18 AWG Belden 9493 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 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 1920 VA 18 AWG Feet 739 VA is the total VA rating of the I O boards For example if you had an 80 VA load 14 AWG 24 ft 18 AWG 9 ft rounded down Table 2 4 Power Wire Lengths Sensors requiring 24VAC can be powered from the same transformer powering the input board as long as the resulting total load of both the input board s and the sensor s connected to the transformer does not exceed the trans former s VA rating and the sensors have an iso 6 MultiFlex Operator s Guide lated power supply If the sensors do not have an isolated power supply they could become dam aged if connected with center tapped or grounded seconda
63. r of the relay you wish to override Press the DigOut4 RIGHT ARROW key and move the arrow to the field then use the keys to select the state you wish to override the relay to ON Override OFF Then use the UP DOWN arrow keys to move the cursor off the Ovr Pct field to begin the override The override will continue until the HHT is 5 unplugged from the board DigOut override field is changed back NOR 0 00 to NOR no override NOR 0 00 To override an analog output locate the AOut field whose number corre sponds to the number of the analog output you wish to override Press the RIGHT ARROW key and use the UP DOWN arrow keys to point the arrow to the field in the Ovr column of the output you wish to over ride Press the key to change the Ovr field to YES then press the RIGHT ARROW key to move the cursor to the Pct column Enter the percentage from 0 100 you wish to override the output to The over ride will continue until the HHT is unplugged from the board or the AOut s Ovr field is changed back to NO Scheduling The MultiFlex RCB Hand Held Interface 43 8 10 Resets Road Map from Description RCB Main Menu The three screens under the RESETS option in the control menu are used to reset runtimes for the cool and heat stages the air fan and the RunTime Reset denser fan and also to reset alarms or return the RCB back to factory CL1 CL2 CL3 CL4 default setpoints To reset any run
64. r with a CPC Hand Held Termi nal HHT or through the E2 front panel 2 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 2 Mounting and Power ing The MultiFlex boards are usually mounted by the refrigeration equipment manufacturer Therefore the installer need only make the nec essary connections between the boards and the site controller s 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 Snap Track Installation 2 1 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 Snap Track Installation 1 REMOVE THE BOARD AND THE INSULATOR FROM THE SNAP TRACK 2 MOUNT THE SNAP TRACK USING THE 1875 SLOTS PROVIDED mp OPERATION OF THE BOARD REMOVE WTHOUT THIS INSULATOR MAY CAUSE SERIOUS
65. rder for the output to control the valve properly heat reversing valves must be wired to the Normally Closed N C contacts and cool reversing valves must be wired to the Normally Open N O contacts This causes the heat valves to activate when heat stages are ON and cool stages to activate when cool stages are ON 6 7 Stand Alone Operation If for some reason an RCB board loses com munications with its parent Einstein unit for lon ger than five minutes the board will go into Stand Alone Mode In Stand Alone Mode the RCB will con tinue Temperature Control as normal using the space temperature as a control input Since an RCB has its own stored fallback setpoints and a fallback occupancy schedule the RCB will con tinue operating using its occupied or unoccupied heating and cooling setpoints Dehumidification and Economization will occur during stand alone mode only if the board is equipped with the right sensors as described below 6 7 1 Dehumidification and Humid ification Stand Alone Opera tion If the RCB board has an auxiliary input defined as a relative humidity sensor dehumidi fication and humidification will continue as nor mal using the RH sensor as a control input 26 MultiFlex Operator s Guide 6 7 2 CO2 Control Stand Alone Op eration The RCB requires the CO2 sensor input to be attached to an RCB board input therefore control of the outside air dampers based on indoor CO2 levels wil
66. rds on the network of the same type This allows the site controller to find it and communicate with it easily Boards of the same type should be numbered in sequence starting with one and continuing with two three and so forth 026 1707 Rev 2 13 APR 10 3 1 2 1 Numbering the MultiFlex RCB The MultiFlex RCB is a unique board type on the RS485 Network by the CPC controllers Each RCB that will be associated with an Ein stein must have a unique number from 1 to 31 which is configured by setting the first five switches on dip switch bank S3 POSITION 1 5 NETWORK ADDRESS 1 31 POSITION 6 7 BAUD RATE 9600 or 19200 BAUD RATE pe 9600 BAUD 19200 Figure 3 2 RCB Baud Rate Switches 3 1 3 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 Einstein controllers On all MultiFlex boards switches 6 and 7 on S
67. reen use the arrow keys to highlight the RCB you wish to view and press The RCB Status Screen for the RCB you se lected will appear Figure 7 3 RCB STATUS Supply Temp NONE Return Temp NONE Figure 7 3 RCB Status Screen The RCB Status Screen shows the current sta tus of all heating cooling fans dampers and other outputs and controlledsystems in the RCB Though there is a large anount of information on an RCB status screen status information is grouped on this screen in several groups of relat ed information in order tomake the screen easier to read These groups are described below 30 MultiFlex RCB Operator s Guide 7 3 1 Temperatures Inputs and System Status The large box on the left side of the RCB Status screen shows the current status of the RCB s most vital control inputs and setpoints In bold at the top of this are the most important of these the CTRL TEMP control temperature and the currently active control setpoint which is displayed in brackets next to the CTRL TEMP value Also in bold at the top of this box are the occupancy state OCC or UNOCC and ZONE TEMP if this RCB is a part of a Zone applica tion Other temperature inputs such as supply air return air and mixed air temperature are also displayed here At the bottom of this box the HHT CON NECTION field shows whether a hand held ter minal is currently plugged into this RCB board The RCB Status shows whether
68. reer ooe ss es sug ea e aerea te 27 6 8 SENSOR FAILURES E AOO EA TA 27 7 THE MULTIFLEX 2 28 Tele ADDING DELETING 28 Tell Addingan A 28 78522 Hp aS pes haps eR any 29 7 2 ASSOCIATING WITH A ZONE 0 0 0 na aE eE EEA EEA EE a EEE Ea Ee 29 7 3 VIEWING THE RCB STATUS SCREEN E riaa REEE EE 30 7 3 1 Temperatures Inputs and System 30 TES Dice KAMOLA 30 7 3 3 Economization Damper 1 30 DONUTS SUALUS tase ous opis EEE 30 7 3 5 Heat and Cool Staged Mod 31 7 3 6 Other Actions from the Status Serel prioriteetti Ees iiei Ee Ea o aae E A pane Ea EES 31 7 3 6 1 Detailed Status 7 3 6 2 7 3 6 3 Reset Runtimes 7 4 RCB SETUP SCREENS 8 THE MULTIFLEX RCB HAND HELD 33 8 1 RC
69. result is the heat differential This differential is compared to the value ofthe heat differential set point Software Overview 21 If the differential is smaller than the setpoint the VS Fan speed will increase This will bring more air into the RTU thus increasing the sup ply air temperature and increasing the value of the heat differential If the differential is larger than the setpoint the VS Fan speed will decrease This will bring less air into the RTU thus decreasing the supply air temperature and decreasing the value of the heat differential Differential Control During Cooling When cooling begins the VS fan begins operating at the minimum VS speed specified by a setpoint in the RCB The RCB subtracts the value of the supply air temperature from the value of the mixed or return air temperature the result is the cool differential This differential is compared to the value of the cool differential setpoint If the differential is smaller than the setpoint the VS Fan speed will increase This will bring more air into the RTU thus decreasing the sup ply air temperature and increasing the value of the cool differential If the differential is larger than the setpoint the VS Fan speed will decrease This will bring less air into the RTU thus increasing the supply air temperature and decreasing the value of the cool differential Differential Control During Dehumidification Differential fan control during
70. rom the final VS fan speed when dehumidification is active For example if the dehumdification offset is 5 and cool stage 1 s VS fan speed setpoint is 50 when dehumidification is active with one cooling stage ON the VS fan speed will be 45 50 5 If a second cool stage with a set point of 100 were to turn ON the VS fan speed would increase to 95 100 5 6 3 2 2 Differential VS Fan Control In Differential fan control the VS fan speed is determined by the difference in temperatures between the air entering RTU mixed air if economization is used or return air if not used and the air leaving the RTU supply air The RTU increases or decreases the fan speed to achieve a constant temperature differential between the supply and mixed or return air Sensors Used in Differential Calculation Differential VS control requires the presence of a supply air temperature sensor On the return side the RCB will use one of the following sen sors listed in order of priority Mixed air temperature sensor Return air temperature sensor Space temperature sensor Bee Zone temperature sent to the RCB from its associated Zone application in E2 Differential Control During Heating When heating begins the VS fan begins operating at the minimum VS speed specified by a setpoint in the RCB The RCB subtracts the value of the mixed or return air temperature from the value of the supply air temperature the
71. ry transformers 026 1707 Rev 2 13 APR 10 2 4 MultiFlex RCB Battery and Battery Enable Jumper The RCB uses battery backed memory The battery for the MultiFlex RCB is located either underneath the output plug in board for old style MultiFlex boards or on the rear side of the input board layer facing the snap track Figure 2 6 OLD STYLE MULTIFLEX BOARD FRONT VIEW NEW STYLE MULTIFLEX BOARD Figure 2 6 MultiFlex Battery Location Battery backed memory is enabled by the ENABLE BATTERY jumper JP5 located at the bottom right corner of the input board layer Figure 2 7 This jumper is shipped from CPC in the DISABLE position The jumper should be set to the ENABLE position UP before instal lation To preserve battery life when storing the MultiFlex RCB the jumper should be set to the DISABLE position ENABLE POSITION Figure 2 7 Enable Battery Jumper on MultiFlex Board The MultiFlex RCB Battery and Battery Enable Jumper Mounting and Powering 7 Thel O Network Although the MultiFlex RCB can operate as a stand alone controller it relies on an E2 unit for advanced features such as remote dial in dial out logging and alarm control All M
72. seconds the board is not properly communicating on the I O network 026 1707 Rev 2 13 APR 10 5 5 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 3 and Table 4 4 Relay Output LEDs Board Status LEDs 17 6 Software Overview Introduction to Zone Con trol 6 1 Though RCBs may be used as stand alone rooftop unit controllers when used with CPC E2 BX building controllers they may be networked together in groups called zones Zones are groups of rooftop boards and applications ARTC RCBs and or AHU air handling units that share the same heating cooling and dehu midification setpoints as well as other control parameters The primary purpose of zone control is to maintain a specific temperature and humid ity level throughout a wide area using multiple rooftop units or air handling unit applications Association between an RCB and a Zone application in the E2 BX is performed in the E2 user interface refer to Section 7 2 Associating an RCB with a Zone Application When an RCB is part of a Zone application the parameters listed in Table 6 1 are downloaded from the Zone application and used in place of the values programmed in the RCB board Changes made
73. set point shift inputs you may choose to limit the rate at which heating and cooling set points will change as a result of changes to the potentiometer Entering a value greater than 0 0 H in this field will cause the setpoints to increase or de crease by a maximum of the SpChgRate each hour until the set point change called for by the input is reached If you do not wish to limit the rate at which the set points will change set this field to 0 0 H 46 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 Miscellaneous Analog KW Setup Volt KW 0 00 0 00 5 00 100 0 Min Max 15M OFF ApproTime RTequalize OccOvrd NOR PrfWtDly 05 00 Daylight Savings APR 1stWeek SUN DLT Savings End OCT 5thWeek SUN Road Map from Description RCB Main Menu Analog KW Setup The fields in this screen set the minimum and maxi mum input voltages coming from the KW transducer s analog input and scales it to the minimum and maximum KW represented by the in put voltages In the Min fields enter the minimum voltage of the KW transducer input and the number of KW that voltage represents usually zero In the fields enter the maximum voltage of the KW transducer input and the number of KW that voltage represents Refer to the trans ducer s user documentation to determine this value ApproTime This feature is not currently implemented RTequalize The RCB has the capability of equalizing heating and cool
74. t affects the amount the integral mode of PID will change the PID output based on the amount of time the input has been higher or lower than the set point Integral mode seeks toincrease or decrease PID output when pro portional mode alone isn t successful in bringing the input equal to the setpoint By default it is only used in heating and cooling control and it is recommended to remain at 0 00 for all other systems that are not related to heating and cooling I Gain should only be changed in small amounts tenths or hundredths to increase or decrease the system s re action time to input changes TR Simply put throttling range is the number of engineering units be tween a PID output of 0 and a PID output of 100 For example in heating control if your heating setpoint is 69 F and your throttling range is 3 the proportional mode of PID begins at 0 when the input is equal to the setpoint 69 and gradually climbs to 100 as the input falls to three degrees F below setpoint 66 The Throttling Range is the primary means of setting up PID control behavior In general larger values ofthe throttling rangeresult in slower reactions to input changes The MultiFlex RCB Hand Held Interface 45 8 12 Miscellaneous Road Map from Description RCB Main Menu Date The current date kept by the RCB Iis not necessary to set this with the HHT if the RCB is part of an E2 Zone application since the E2 will D 01 01 05 kee
75. t systems in the RCB use PID control PID is short for Proportional Integral Derivative a control strategy that takes into account not only the difference between a control input and a control setpoint but the amount of time thetwo have been different and the rate at which itis changing The result isa 0 100 output that is used to con trol an output that is used to bring the input closer to the setpoint There are seven systems that use PID control in the RCB Heating Cool ing Humidification Dehumidification Economization Low Supply Temp and CO2 Each system uses a modified version of PID called P which uses three constants that determine how the RCB will re act to changes in input value The values chosen by default for the PID constants are the recommended settings foruse in HVAC control It is not reommended you alter these values without assistance from CPC P The P field is the PID s proportional gain This is a multiplier that af fects the amount the proportional mode of PID will change the output percentage when reacting toa control input value change Larger values of P Gain result in larger percentage changes in the PID output Note that Throttling Range also affects proportional mode and it is recom mended you change the throttling range if you require a big alteration to the way the PID output works P Gain should only be used for fine tuning I The I field is the PID s integral gain This is a multiplier tha
76. the board is cur rently communicating with the E2 Online or has lost communication Offline 7 3 2 Fan Status The top box in the centercolumn of the RCB Status Screen shows the status of all fans con trolled by the RCB This includes the ON OFF status of a single speed fan the current speed of a two speed blower fan OFF LOW HIGH and the speed percentage of a variable speed blower fan 7 3 3 Economization Damper Sta tus In the top box of the right column in the RCB status screen the economization state is displayed Econ Status shows NOECON if econ omization checking shows the outside air is not favorable for economization or ECON if econo mization is OK 7 3 4 Dehum Status The dehumidification status is shown in the middle box of the right column on the RCB Sta tus screen The Dehum Status is OFF if no dehu midification is active or ON if dehumidification 026 1707 Rev 2 13 APR 10 is active ON in this field will signify the dehumidification device is active if one is pres ent and it may also signify one or more cool stages are currently active to achieve dehumidi fication 7 3 5 Heat and Cool Staged and Mod Status The heating and cooling status for the RCB is shown in the two boxes at the bottom right of the RCB status screen If using staged heating or cooling the current ON OFF status of the stages will be shown If using modulated heating or cooling the mod percentage will be shown
77. the reversing valve output will be active If set to HtAct the RCB will energize the rday when heating mode is active If set to ClAct the RCB will energize the relay when cooling mode is active Low Supply Temp Enable If you wish to enable low supply temperature shutdown set this field to YES SetPt This is the minimum supply temp s point to be used in low supply temperature shutdown If the supply temperature falls below this set point for an amount of time longer than the Delay cool stages will be deactivated Delay The Delay is the amount of time the supply temperature must be below the SetPt before cool stages will be deactivated Econ OCC UNO Delta During economization the mixed air tempera ture set point is determined by the active cooling set point MINUS the value of the Econ Delta parameter For example if the active occupied cooling set point is 72 F and the Econ OCC Delta is 5 4 RCB will control the damper to attempt to maintain a mixed air temp of 66 6 F 72 5 4 DewPtSP The Dewpoint Setpoint is used when the Outside Dewpoint Vs Setpoint strategyof economization checkingis used inwhich case economization will be enabled when the outside dewpoint is lower than this set point OATDelta The OATDelta is used in economization checking only when the Temp Comparison strategy is being used This value is added to the indoor space temperature andcompared to the outdoor air temper ature if the o
78. times alarms or setpoints on these screens press the RIGHT ARROW key and use the arrow keys to highlight the field you wish to reset Press the key to change the field from to Yes HT1 HT2 HT3 The reset will take place as soon as you move the cursor off the field CL1 CL4 These are used to reset the runtime logs for cool stages 1 4 HT4 These used to reset the runtime logs for heat stages 1 4 AirFan This is used to reset the blower fan runtime log CndFan This is used to reset the condenser fan runtime log Reset Alms Reset Alms Resetting this field will reset any alarm condition that cur Reset SPs rently has RCB mnning in a safe mode This includes pwof failures and smoke alarm shutdowns Reset SPs Resetting this field will restore all RCB setpoints back to the original factory defaults All inputs outputs and setpoint configuration done in this RCB will be lost NOTE If this RCB is associated with a Zone the reset will only last as long as the HHT is plugged into the RCB When the HHT is removed the E2 will rewrite its stored config uration tothis RCB Resetting setpoints from the HHTdoes NOT affect this RCB s configuration in the E2 44 MultiFlex RCB Operator s Guide 026 1707 Rev 2 13 APR 10 8 11 PID Road Map from Description RCB Main Menu Heating P 1 00 I TR 3 00 7 screens total PID 0 25 Most of the importan
79. tself may not be pro grammed with separate sets of occupied and unoccupied set points for use during summer and winter However when associated with a Zone application the Zone may be programmed with different summer vs winter setpoints and the Zone can determine the correct seasonal mode and pass the appropriate set points to the RCB when the season changes 6 2 2 Low Supply Temp If desired to guard against the possibility of overcooling you may enable a supply tempera ture minimum setpoint in the RCB If the supply temperature falls below the minimum supply temperature for an amount of time equal to the programmed delay the RCB will deactivate cool stages until the temperature rises above the set point 20 MultiFlex Operator s Guide 6 3 Fan Control The RCB boards support control of one sin gle speed fan stage a low and a high speed fan stage 1 two speed fan control or a variable speed fan The fans may be controlled in one of three ways Continuous The fan is always on even when the AHU Zone application is not in heating cooling or dehumidification mode In two speed or variable speed fan control when heating or cooling is not ac tive the fan will be ON at a fixed user defined de fault speed Auto The fan is only on when the AHU Zone ap plication is in heating cooling or dehumidification mode Summer ON Winter Auto This mode allows the fan to operate in Continuous mo
80. ulti Flex boards and controllers use an RS485 net work connection to communicate with E2 site controllers 3 1 Wiring Types CPC specs Belden 8761 shielded twisted pair cables for use as I O network wiring or Belden 82761 and Belden 88761 for plenum installations If the recommended cable is not available in your area be sure the wiring meets or exceeds the following specs Shielded Conductor Type Twisted Pair Gauge 18 24 AWG Capacitance between 31 pF ft or less signal wires Capacitance between 59 pF ft or less signal and shield Nominal Impedance 1200 500 Table 3 1 RS485 Network Wiring Specifications 3 1 1 Daisy Chains The RS485 Input Output I O network con nects all input and output communication boards together in a single open communications loop This loop or daisy chain connects the E2 to 8 MultiFlex Operator s Guide multiple input and output communication boards and terminates at the last input or output board on the network A dagram of this network arrangement is shown in Figure 3 1 VO NETWORK lt lt input OR OUTPUT BOARD 26513041 Figure 3 1 I O Network Configurations 3 1 2 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 boa
81. unt of time the RCB will wait before switching speeds If the RCB calls for a transition from LOW to HIGH or from HIGH to LOW the RCB willwait for thedelay to pass before switching speeds VS Fan Diff This screen allows you to set the minimum and maximum fan speeds for variable speed fans during differential mode When a VS fan is active during differential it will begin operating at the minimum percentage when heat or cool mode first begins and the VS fan will never operate at a speed below the minimum fan speed The maximum percentage is the high limit for the VS fan speed during differential mode You may specify separate minimum and maximum VS fan speeds for heating and cooling control The MultiFlex RCB Hand Held Interface 39 Road Map from Description RCB Main Menu Diff HT SP When Differential VS Fan Control is being used the Differ ential Heat setpoint is the difference between the supply and return air Diff HT SP 45 0 temperatures the RCB will try to maintain during heating The VS fan Diff CL SP 20 0 speed will increase or decrease to keep the heat differential equal to this Diff Dehum 25 0 setpoint Mode Staged Diff CL SP When Differential VS Fan Control is being used the Differ ential Cool setpoint is the difference between the return and supply air temperatures the RCB will try to maintain during cooling The VS fan speed will increase or decreaseto keep the cool differentialequal to this setpoint
82. urn air is mixed with outside air ods ose ose ES Outside air tempera r i ture sensor StPt Adj POT Slide potentiometer for eS ee adjusting heat and cool Ep EAST set points RCB INPUTS 1 8 RCB INPUTS 9 16 ID Hum HUMID 0 5VDC Humidity Figure 4 1 MultiFlex RCB Input Locations ITY Sensor mounted The MultiFlex RCB has sixteen combination indoors analog digital outputs for connection to all ana OD Hum HUMID 0 5VDC Humidity log and digital sensors transducers switches ITY Sensor mounted out and other input types typically used in a rooftop doors as 5 g DuctPres INW Pressure sensor mea tion for each point must e programmed the suring duct pressure in RCB software by the installer inches of water Figure 4 1 shows where the inputs are BldgPres INW Pressure sensor mea located on the MultiFlex board Table 4 1 suring indoor air pres describes the input types that may be pro sure in inches of grammed in the RCB water Dewpoint DEW CPC Dewpoint Probe POINT CPC P N 203 1902 measuring dew point RCB Input NOT USED Select this option to indicate no sensor is connected to the input point SpacTemp Indoor air temperature sensor in the floor area KW Input Watt hour transducer with 0 SVDC output PO
83. utdoor air temperature is lower than this value econo mization will be enabled 026 1707 Rev 2 13 APR 10 Control Menu AirFan OCC Mode AUTO DHSpdDlta DehumLoSP AirFan Delays ON OFF 01 00 01 00 00 00 00 00 HT CL Control Type 1 Speed Staged Staged Fan Heat Cool Low2Hi HT CL Stg 2 2 Mod 50 50 SpinDwnDly 00 30 VS Minx Max Road Map from Description RCB Main Menu Air Fan Mode OCC UNO The Air Fan Mode Occupied and Unoccupied fields determine the method of fan operation during occupied and un occupied building times AUTO mode activates the fan only when heating or cooling is active CONT mode activates the fan continu ously even when there is no heating or cooling active SOWA means the fan will be continuously ON in the summer season and AUTO mode in the winter season DHSpdDita Dehum Speed Delta is the amount the VS Fan speed must change from its current position before the VS Fan will actually be commanded to operate at a different speed For example if the DH SpdDelta is set at 3 and the current VS Fan Speed is 50 the fanwill remain at 50 until the calculated fan speed exceeds 53 or falls be low 47 This feature will keep the fan from reacting to every small change in the calculated VS Fan percentage DehumLoSP If the control temperature falls below this setpoint dehu midification will be locked out to prevent overcooling Dehumidifica tion will remain loc
84. y is used each heat and cool stage has its own indi vidual VS fan speed setpoint When one or more stages are active the RCB will look at the set points of all active stages and operate the VS fan at the highest setpoint value Example An RCB is controlling two heat stages Heat stage 1 5 VS fan setpoint 15 50 and Heat stage 2 5 VS fan setpoint is 100 When heating mode first begins and the heat stage 1 becomes ACTIVE the fan will increase speed from idle to 50 When heat stage 2 is activated for more heating the RCB looks at both heat stage 1 2 5 setpoints determines that the highest setpoint belongs to stage 2 100 and increases the fan speed to 100 Economization VS Fan Speed Because cooling treats economization as a stage of cooling the economization damper has its own fan speed setpoint When economization is enabled during cooling but no other cooling stages are active the VS fan will operate at the economization fan speed setpoint Idle VS Fan Speed When using the Staged VS strategy with the Continuous fan mode see Section 6 3 Fan Control the RCB will use the Idle VS Fan Speed setpoint when no cooling or heating stages are active Fan Control Dehumidification Offset During dehumidification typically you will want a lower VS fan speed The RCB uses a dehumidification offset parameter to achieve this When an offset greater that 0 is specified in the RCB the offset is subtracted f

MultiFlex RCB Rooftop Controller Installation and Operation Manual

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