Opus Refrigeration Control System User Guide

Transcription

1 Opus Refrigeratin Library Opus Refrigeratin Cntrl System User Guide Table f Cntents Table f Cntents...1 Overview and General Cncepts...2 Interactive Screens...3 Autmatic Creatin f Data Lgs and Alarms...3 Viewing Data Lgs...3 Navigating within Screens...3 Glssary f Terms...4 Preparatins...5 Opening Screen fr Refrigeratin Cntrl...7 Cnfiguring a Rack...7 Rack I/O Pints...7 Circuit Cntrl...8 Circuit Overview...10 Circuit Cnfiguratin...12 Temperature Cntrl Settings...15 Defrst Cntrl Settings...21 Glbal Defrst Schedule Overview...26 Circuit and Defrst Default Operatins...26 DX Case Cntrl...27 Secndary Lp Case Cntrl...31 Defrst Ntificatin...34 I/O Overview...34 Data Lgs...34 Cmpressr Cntrl...35 Thery and Descriptin f Algrithms...35 Cmpressr Cnfiguratin...36 Cmpressr Overview...37 Suctin Flat Cnfiguratin...38 Cmpressr Staging...40 Circuit Shutdwn Grups...42 Cmpressr I/O Setup...42 Cndenser Cntrl...43 Thery and Descriptin f Algrithms...43 Cndenser Cnfiguratin...53 Defining Cndenser I/O Pints...57 Cndenser Default Operatins...59 Cndensing Units...60 Miscellaneus Equipment...61 Histries...65 Alarms...66 Cnfiguring LCD Screens...66 Appendix 1: RCC-1081 Mdes f Operatin.. 69 USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

2 Overview and General Cncepts The Opus Refrigeratin Library has been created t facilitate the develpment and maintenance f a Nvar cmmercial refrigeratin cntrl system. This guide will step yu thrugh the cnfiguratin prcess and explain each cntrl setting chice that is ffered. It is written fr a user with refrigeratin cntrl systems experience. Therefre, basic refrigeratin cncepts are nt reviewed, and cmmnly accepted refrigeratin cmpnent terminlgy is used. It als assumes prir experience with Opus/Niagara. Opus certificatin is advised fr anyne that is initially cnfiguring a system. A brief glssary f refrigeratin terms is prvided. Figure 1. Refrigeratin Graphics USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

3 Interactive Screens Autmatic Creatin f Data Lgs and Alarms Viewing Data Lgs Navigating within Screens As selectins are made, screens will autmatically display relevant parameters and hide unused parameters. Fr example, if a circuit is set fr Dual Temp cntrl, additinal dual temperature cntrl parameters are displayed. Otherwise, these chices are hidden. This cncept hlds true fr many ther selectins. Therefre, sme f the screens displayed in this Guide may nt exactly match what yu see as yu develp a system. As input and utput pints are defined, typical histry and alarm pints are created autmatically, but they must be enabled befre they will functin. Glbal verview screens that list all alarms r histry pints prvide a cnvenient methd fr enabling all desired alarms and histries. Further refinement f the alarm and lg parameters may be needed in certain applicatins. After a system is cnfigured and is up and running, the simplest way t view data lgs fr a pint is t psitin the muse ver the pint s value then click the muse. Fr example, psitin the muse ver the display f suctin r discharge pressure and press the right muse buttn. This will advance yu t its data lg. Setpints that are within pp-up windws may be navigated mre quickly by using the Tab buttn instead f the muse. This is especially useful when yu are defining the temperature and defrst parameters f a circuit. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

4 Glssary f Terms Table 1. Glssary f Terms Term Dual Temp EEPR EPR EXV and/r EEV LLSV LT MT rcc.521 rcc.1081 Secndary System TXV Definitin A refrigeratin circuit that has the capability f perating t either Medium Temp r Lw Temp setpints, selected via the flip f a switch. Electrnic Evapratr Pressure Regulatr Evapratr Pressure Regulatr (mechanical) Electrnic Expansin Valve Liquid Line Slenid Valve Lw Temp Refrigeratin Medium Temp Refrigeratin A Nvar prduct that cntrls refrigerated circuit and case cmpnents. Fr mre infrmatin, visit the Nvar web site - dcumentatin repsitry. A Nvar prduct that cntrls refrigerated circuit and case cmpnents. A newer, upgraded versin f the rcc.521. Fr mre infrmatin, visit the Nvar website - dcumentatin repsitry. A secndary refrigeratin system is where a traditinal refrigerant is used t cl a fluid via a heat exchanger. The chilled fluid (like glycl) is then pumped t the refrigeratin circuits t prvide the cling. A secndary system uses much less refrigerant than a DX system. Thermstatic Expansin Valve (mechanical) USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

5 Preparatins Figure 2. Refrigeratin Cntrl Opus Prperty Sheet The Refrigeratin Cntrl Opus Prperty Sheet cntains prperties that can be used t custmize the Refrigeratin Cntrl screens. This prperty sheet wuld usually nly be used when initially setting up the refrigeratin cntrl system. The mst cmmnly used fields fr system setup: Hide Cndensing Unit Tab The default value is true. Set t false if yur system cntains cndensing units. Hide Misc Equipment Tab The default value is false. Set t true if yur system des nt cntain miscellaneus utput pints that need t be cntrlled. Enable Offnrmal Alarm Offsets - The default value is true. Set t false t turn ff the feature f using alarm ffset. Allw Defrsts Per Day Sched Edit - The default value is true. Set t false t disable the ability t manually edit the defrst schedule times. Table 2. Preparatin Prcedure Step Prcedure 1 Gather up all the prper infrmatin Rack Legends and Circuit and Case Cntrl Parameters. 2 Create an Opus statin either frm a template r by creating a new statin. This will nt be cvered in further detail in this dcument. 3 Create the cmmunicatin drivers fr the system: Spectrum, Nvarnet, BACnet, etc 4 Define the hardware cmpnents under each driver, define the cntrllers that will be used. Fr example, Spectrum cntrllers like the Cmpressr Output Mdule (COM), Cndenser Cntrl Mdule (CCM), Rack Input Mdules (RIM), etc. shuld be defined. This can be dne by dragging and drpping them frm a palette, r thrugh the replicatin f an existing cntrller. See Appendix 1 fr mre inf. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

6 Step Prcedure 5 Mst I/O pint names can remain at their defaults at this time. The nly exceptin may be fr the input sensrs f a Rack Input Mdule. Yu may want t define thse when yu create the RIM. Other I/O pint names can be re-defined later as they are assigned t cntrl strategies. 6 Open the palette called Opus Refrigeratin Library. 7 Drag and Drp frm the library nt Cnfig f the statin. 8 Un-hiding the Cndensing Units tab: If yu are ging t cntrl stand-alne cndensing units (as ppsed t refrigeratin racks) then n the Nav Tree right-click n Refrigeratin Cntrl and view the Opus prperties. The first prperty is Hide Cndensing Unit Tab. Set this prperty t False t make it viewable. 9 Hiding the Misc. Equipment tab: If yur system des nt cntain miscellaneus utput pints that need t be cntrlled, then n the Nav Tree right-click n Refrigeratin Cntrl and view the Opus prperties. The secnd prperty is Hide Misc Equipment Tab. Set this prperty t True t hide it. 10 On the navigatin tree Duble-click n. This will reveal the pening screen f the Opus Refrigeratin User Interface. Frm this pint frward, users shuld be able t cnfigure the cntrl system with the Opus user interface screens. In ther wrds, the navigatin tree shuld nt be needed t further define the refrigeratin cntrl system. It will nly be needed fr ther services. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

7 Opening Screen fr Refrigeratin Cntrl Figure 3. Refrigeratin Cntrl Tabs The Opening Screen cntains 5 default tabs: Racks, Misc Equipment, Miscellaneus I/O Pints, Histries and Alarms. As yu click n each f these tabs, the screens displayed underneath will change t display infrmatin in the selected categry. Fr example, if yu create a rack and click n the Racks tab anther set f screens will be revealed that pertain t a Rack such as circuits, cmpressrs, cndensers, rack I/O pints and Rack Track. Cnfiguring a Rack Rack I/O Pints T create a Rack, right-click n the buttn next t Refrigeratin Cntrl (circled abve in Figure 3) and select Add Rack. Give it a name like MT r LT (shrt names are suggested). Mre than ne rack can be created per XCM, limited nly by the memry and micrprcessr capacity f the XCM. All memry is dynamically allcated as needed, i.e., there is nt a fixed amunt f memry allcated t cntrl, histry pints, alarms, etc. Therefre it is difficult t define the maximum capacity f an XCM. Hwever, fr safety and reliability f refrigeratin equipment it is recmmended that there be nly ne XCM per rack. This is nly a general recmmendatin because sme racks are very large and cntrl a great number f circuits, while thers are very small with limited capacity. Once yu have created a rack, a new screen appears that cntains 4 tabs. The last tab, called I/O Setup is fr a few cntrl pints f glbal significance fr the entire rack. It appears as: Figure 4. I/O Setup USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

8 Table 3. Steps fr Cnfiguring Inputs Circuit Cntrl Step Prcedure 1 Phase Lss Click n the flder t define the path t the main phase lss sensr fr the rack. 2 Outside Air Temp define the path t the utside air temperature sensr. This is typically n the Cndenser Cntrl Mdule (CCM). 3 Heat Reclaim Input if heat reclaim is used, define a digital (Blean) input that indicates when heat reclaim is active. When this pint is clsed (indicating heat reclaim is active) the minimum cndenser pressure setpint may be elevated t accmmdate the heat reclaim. A digital input is used s that this functin will wrk whether the reclaim is cntrlled by Opus r a thermstat that is external t Opus. 4 Ht Gas Output if there is a Master Ht Gas Valve n the Rack, define it here. 5 Ht Gas Valve Delay define a time delay fr the Master Ht Gas Valve. The first Racks tab is called Circuit Grups : Figure 5. Add Circuit Grups Nte the highlighted tl bx buttn abve. Clicking n this buttn reveals a menu that allws yu t begin creating circuits. A tl bx buttn like this exists n many screens, and is used t create and cnfigure numerus refrigeratin cmpnents. Click n this buttn and select Add Circuit Grup. Give it a simple name such as MT Circuits. This will expand the right side f the screen, where yu can add individual circuits t the grup. The upper right crner f the circuit verview screen has a tl bx buttn that is used t manage the circuit verview screen. This is shwn belw: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

9 Figure 6. Add Circuit(s) Frm the pp-up menu, select Add Circuit. This launches a menu that appears as fllws: Figure 7. Add Circuit pp-up This dialg allws yu t create up t 32 circuits at ne time. If yu d this, yu must accept the default circuit names and then change them later. If defining nly ne circuit at a time, yu can either name the circuit nw r accept the default name. There are 3 types f circuits available: Standard Applicable t DX circuits where an RCC mdule is NOT used t cntrl the EEPR valve. DX System EEPR Applicable t DX circuits when an rcc.521 r rcc.1081 circuit cntrller and/r DX cases are being used t cntrl the EEPR valve. Secndary Lp Applicable when rcc.1081 secndary lp cases are being used. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

10 Circuit Overview Figure 8. Circuit Overview Page Table 4. Circuit Overview Page Cntrl Actins Step Prcedure 1 Right-click n any Circuit Name t change the name f the circuit r t delete the circuit. 2 Right-click n Def Override f any circuit t frce r terminate defrst cycles. The menu cntains N Actin, Frce Defrst, Terminate Defrst, and Emergency Defrst selectins. 3 Right-click n Sync Defrst T t link the defrst cntrl f ne circuit t anther circuit. If yu d this, the circuit becmes a slave circuit. This means the defrst parameters can nly be adjusted via the master circuit, nt thrugh a slave circuit (defrst is nw synchrnized with anther circuit). 4 Right-click n any Case Name t change the name f the case r t delete the case. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

11 While viewing the Circuit Status Overview, duble-clicking n a circuit will prduce a view that allws cnfiguratin f an individual circuit as shwn belw. Figure 9. Circuit Cnfiguratin This screen has five (5) tabs: Cnfiguratin: This tab is used t cnfigure the temperature cntrl and defrst settings fr the circuit and is reviewed in detail Case Cntrllers: This tab is used t cnfigure RCC case cntrllers assciated with the circuit. Defrst Ntificatin: This tab is used t link the defrst peratin f this circuit t any extra cntrllers, CMS, rcc.521, r rcc.1081, that are t respnd t the defrst cycle f the circuit. This will frce the displays f these cntrllers t shw DEF during a defrst cycle. Any rcc.521 r rcc.1081 device that has been assigned t this circuit des nt need t be defined n this screen as the defrst cycle f the cntrller will fllw that circuit. I/O Overview: This tab displays the real time status f all I/O pints assciated with the circuit nce defined. Data Lgs: This tab displays the data lg (histry) pints assciated with this circuit. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

12 Circuit Cnfiguratin This screen is divided int three (3) panes t display status, temperature cntrl settings, and defrst cntrl settings. Circuit Status displays real time infrmatin abut the circuit. Mst f this area is nt adjustable it is read nly mnitring infrmatin. Figure 10. Circuit Status A muse-ver actin n sme f the mnitring values will highlight the field. When this ccurs, clicking n the field will prduce a pp-up that prvides access t the histry and/r alarm infrmatin assciated with the pint. Sme highlighted mnitring values may have a right-click actin menu assciated with the pint. Different menus are brught up accrding t the prperties f the pint. Fr example, a pint may have an Add Alarm and/r an Add Histry actin assciated with it. Once the histry and alarm have been added t the pint a right-click n that pint will be ignred. See the Refrigerant Leak Detectr r Maintenance Switch Input fr example right-click menus. The fields displayed are the fllwing: Cntrl Temp This is the temperature that the circuit is attempting t maintain at setpint. If there is nly ne temperature sensr, it will be displayed. If there are multiple temperature sensrs, it will display the minimum, maximum, r average temperature, depending n hw the circuit is prgrammed. Active Setpint (Current DAT Setpint n the DX Circuit) - This is the currently active setpint. If it is a dual temperature circuit, it will display the setpint that is currently in use. Op Mde (Current Cycle n rcc.521 DX System EEPR Circuit) - This is the current perating mde f the circuit. The reprted states fr a Standard r Secndary Lp Circuit are as fllws: Idle On Off Delay t Defrst USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

13 Defrsting Draining Shutdwn Standby The reprted states fr a DX System EEPR Circuit are as fllws: Off Cycle Cling Pump-Dwn Defrsting Draining Shutdwn Standby The circuit may g int Shutdwn mde due t the fllwing: Phase Lss, the detectin f a leak via a Refrigerant Leak sensr, r a Cmpressr Lckut cnditin. The Standby mde displays if there is a Maintenance Switch reprting a true value r if the circuit is in Maintenance Shutdwn. Mde Time This displays hw lng the current perating mde has been in effect. Each time the mde changes, this timer resets t zer. Last Defrst Duratin This is the time duratin f the last defrst cycle. Defrst Term Temp Displays the temperature reading that is used fr qualifying the terminatin f a defrst cycle. The Def Term Type field in the Defrst Cntrl Settings selects the inputs and the calculatin methd t be used t arrive at the temperature reading. Defrst Pending If a defrst cycle is due, but is being held ff frm running fr a reasn such as the maximum number f cncurrent defrsts allwed, then this will display Yes. It will cntinue t display Yes until the defrst cycle begins. Next Scheduled Defrst Time This is the date and time f the next scheduled defrst time. Refrigerant Leak Detectr This is the status f the refrigerant leak detectr input. A right-click menu allws verriding the input pint. This mnitring value will nly be displayed nce the input has been cnfigured. Fr Standard and Secndary Lp Circuits use the I/O Setup buttn lcated in the Defrst Settings sectin. Fr DX System EEPR circuits use the RCC Setup buttn lcated in the Temperature Cntrls Settings sectin. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

14 Figure 11. Right-click menu fr Refrigerant Leak Detectr Maintenance Switch Input This is the status f the maintenance input switch. A right-click n this value allws verriding, adding a histry pint and adding an alarm t the input pint. Cnfiguring this input pint can be dne by clicking n the value in this sectin r selecting the I/O Setup buttn lcated in the Temperature Cntrl Settings sectin f the page. Figure 12. Right-click menu fr Maintenance Switch Input Dr Switch In This is the status f a dr switch, if there is ne prgrammed. Cnfiguring this input can be dne by selecting the I/O Setup buttn lcated in the Temperature Cntrl Settings sectin f the page. Defrst Output This is the status f the defrst utput. The defrst type must be cnfigured as Electric r Ht Gas t mnitr this value. Evap Fan Output This is the status f the evapratr fan utput. LLSV Output (Supply Slenid if rcc.521 DX System EEPR Circuit) This is the status f the LLSV utputs(s). EEPR Output (Standard/Secndary Lp Circuits Only) This is the status f the EEPR utput. This value is nly displayed when the Valve Mde is cnfigured as EEPR. EEPR Valve Ps This displays the percentage f valve pening. This is applicable fr DX System EEPR Circuits and Standard/Secndary Lp Circuits with a Valve Mde cnfigured as EEPR. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

15 Dual Temp Switch This displays which case is currently being cntrlled, MT (Medium Temperature) r LT(Lw Temperature), when Dual Temp Switch is enabled. Dual Temp Output If the circuit is prgrammed fr dual temp peratin, and if a unique utput is energized when the circuit is in LT vs. MT peratin, this field indicates the status f that utput. This is smetimes used t bypass an EPR valve during LT peratin. Case Temperature Sensrs(s) are displayed belw the black hrizntal line. A right-click n any f the input values allws the user t verride the value. A single-click n the values will display histry and/r alarm infrmatin. Defrst Terminatin Sensr(s) will als be displayed here if the Defrst Term Temp setting fund in the Defrst Settings sectin has been cnfigured as Defrst Temp Sensrs. The same singleclick and right-click actins are available n these values. Temperature Cntrl Settings Figure 13. Right-click menu fr Inputs Figure 14. Temperature Cntrl Settings Dual Temp Switch: This appears when dual temp is enabled, and ffers the user a secnd set f setpints fr the fllwing: MT Setpint - the Medium Temperature Setpint; the default setpint is fr Lw Temp. MT Deadband - Medium Temperature Deadband. Setpint (if Dual Temp Switch is Disabled; LT Setpint if Dual Temp Switch is Enabled) This allws the user t enter the desired circuit setpint. All cases n a circuit will cntrl t the USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

16 same cntrl setpint. If multiple setpints are required n each case, then define each ne as a separate circuit. Deadband (if Dual Temp Switch is Disabled, LT Deadband if Dual Temp Switch is Enabled) This allws the user t enter the deadband used fr temperature cntrl. The deadband is split half abve and half belw the setpint. Alarm Offsets If yu want the alarm setpints t be based n an ffset frm the temperature cntrl setpint, this allws yu t define the high and lw ffsets fr these alarms. It defaults t +12/-12. Yu can mdify these values if needed. T change default alarms ffset values, g int the Opus Prperty Sheet f the Circuit Grup and adjust them. T cmpletely turn ff the feature f using alarm ffsets, g int the Opus Prperty Sheet f Refrigeratin Cntrl and set Enable Offnrmal Alarm Offsets t false. Case Cntrl Methd This appears when there are multiple temperature sensrs in a circuit, define whether t use the Minimum (cldest), Maximum (warmest), r Average temperature fr cntrl. Valve Mde (Standard Circuit/Secndary Lp nly) - This allws the user t chse ne f the fllwing: Temperature In this mde, the circuit is cntrlled by cycling the liquid line slenid valve (LLSV) n and ff. The LLSV will als clse during defrst cycles. EEPR In this mde, temperature cntrl will be achieved by mdulating the EEPR valve, and the LLSV will remain n all the time except during defrst cycles. EPR In this mde, a mechanical EPR cntrls the temperature. The LLSV will remain n all the time except during defrst cycles. Valve Type (rcc.1081 DX System EEPR Circuit nly) This allws the user t select the stepper valve type. The EEV stepper mtr type is preset based n the valve type. If a Custm valve is selected the Uniplar/Biplar setting is cnfigurable. KE2 Therm HSV Sprlan SIE/SER 0.5 t 20 SER B-L SEI-30 CDS 9 t 17 SFV, CDS 4, 7 ETS12-50 ETS100 Carel Mechanical Custm Valve Type (DX System EEPR Circuit nly) This allws the user t select the stepper valve type: Uniplar Biplar USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

17 Dr Switch Mnitr: If set t - N the circuit will nt shut dwn based n a dr switch. Yes when the dr is pen, the LLSV and evapratr fan will shut dwn. When the dr clses, they resume peratin immediately. NOTE! If yu want t display a dr switch but take n cntrl actin based n its psitin, leave this parameter set t N, but define the switch in the I/O Setup f this circuit. LLSV On Delay (Standard/Secndary Lp Circuit nly) This specifies the time duratin that the temperature must be abve setpint/deadband befre energizing the LLSV. The Valve Mde parameter must be set t Temperature t access this setting. LLSV Off Delay (Standard/Secndary Lp Circuit nly) - This specifies the time duratin that the temperature must be belw the setpint/deadband befre de-energizing the LLSV. The Valve Mde parameter must be set t Temperature t access this setting. Maintenance Shutdwn If this is set t Yes, the circuit will turn ff and defrsts will nt take place. Blended Air Temp Rati (Secndary Lp Circuit) This specifies the rati f discharge air temperature t return air temperature fr the blended air temperature calculatin. Edit EEPR PID buttn (Standard/Secndary Lp Circuit) - This buttn is used t cnfigure the EEPR PID Parameters. The Valve Mde parameter must be set t EEPR in rder t have access t these parameters. Selecting this buttn will pen a windw as fllws: Figure 15. EEPR PID Parameters (Standard/Secndary) USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

18 Cntrl Directin This can be set t either Direct r Reverse. Unless it is a very special applicatin, this is always set fr Direct. Direct means that the EEPR will pen upn a temperature rise. Respnse Time This is the perid f time that the PID utput will pause after changing psitin. Output at 0% and Output at 100% - These fields can be used t define the range and directin f the vltage used t psitin the EEPR valve. If yu want the valve t fail pen, then it is usually set up s that 100% is at zer vlts and 0% is at 10 vlts. Anther example is if yu have a valve that cntrls with 1-5 vlts, then set 0% at 1 vlt and 100% at 5 vlts (r 5 and 1 if yu want it t fail pen). EEPR PID buttn (DX System EEPR Circuit) This buttn is used t cnfigure the EEPR PID and Valve Parameters. Selecting this buttn will pen a windw as fllws. Figure 15-b. EEPR PID Parameters (EEPR) Minimum Output This value sets the lw end f the PID utput percentage range. Maximum Output This value sets the high end f the PID utput percentage rate. Override Duratin This value sets a time limit n an verride f the PID utput. Output Override Value This value sets the percentage t verride the PID utput t. Number f Steps This value can nly be mdified if the circuit is cnfigured as an rcc.521 circuit r if the circuit is USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

19 cnfigured as an rcc.1081 circuit and the Valve Mde is cnfigured as Custm. Step Rate This value can nly be mdified if the circuit is cnfigured as an rcc.521 circuit r if the circuit is cnfigured as an rcc.1081 circuit and Valve Mde is cnfigured as Custm. RCC Setup buttn (DX Circuit nly) This buttn is used t pen a windw that cntains the selectr fr the rcc.521 r rcc.1081 used fr cntrl f this circuit s EEPR valve. Yu can als set the Discharge Air Temperature and Refrigerant Leak Sensrs t be Lcal r System, defined as: Lcal DAT and leak sensrs that are wired directly t this rcc.521 r rcc.1081 circuit cntrller will be used as the surce. System - Sensr(s) that are wired elsewhere in the system (nt n this rcc.521/rcc.1081) will be used as the surce. If lcal and additinal system sensrs are t be used, then set it t System and define all the sensrs t be used, including the lcal sensr. I/O Setup buttn Selecting this buttn pens a windw that cntains selectrs that are used t define the required hardware pints fr temperature cntrl f the circuit. It is nt required t fill them all in nly the nes that are required fr the functinality f this circuit. When cnfiguring a Standard r Secndary Lp Circuit if the Valve Mde parameter is set t EEPR, the Temp Cntrl I/O Setup windw will cntain a sectin fr cnfiguring EEPR Valve(s). USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

20 Figure 16. Temperature Cntrl I/O Setup Nte n Grup Editing f Alarm and Histry Pints each sectin f this windw cntains a tlbar buttn in the upper right crner. If yu click n the tlbar buttn the drp-dwn menu that appears cntains a chice t Enable Grup Edit. If this is selected, then all the I/O pints in that sectin will share cmmn alarm and histry parameters, making it faster t set up and manage. Hwever, if yu want unique alarm and/r histry set-ups fr each sensr, then uncheck Enable Grup Edit. If it is selected, then click n the buttn prvided t edit the grup Alarm/Histry Inf. If it is nt selected, then duble-click n each individual pint t edit its alarm r histry set-up. T add I/O pints in the apprpriate sectins, use the tlbar buttn in the upper right crner. Case Temperature sensrs add/delete the sensr(s) that will be used fr temperature cntrl f the circuit. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

21 Dual Temp Switch Input(s) add/delete the input(s) that will be used fr dual temperature setpint selectin. Defrst Cntrl Settings Figure 17. Defrst Cntrl Settings Explanatin f Optinal Autmatic Defrst Scheduling Opus can perfrm defrst scheduling in 2 ways, either thrugh manual scheduling (called Fixed Schedule ) r thrugh autmatic scheduling (called Defrsts per Day ). Defrsts Per Day: In this methd, users define the number f desired defrst cycles per day, the start time fr the first defrst, and the maximum defrst time. It will create the desired defrst cycles, staggering them thrughut the day and crdinating them with ther defrst cycles. Yu can manually change the defrst times, but if yu adjust the number f defrsts per day r the duratin, yur manual changes may get verwritten. NOTE! T disable the ability t manually edit the defrst schedule times, g t the Opus Prperties f the Refrigeratin Cntrl cmpnent. Fixed Schedule: This methd is used t manually enter all f the defrst times fr a circuit. See Defrst Sched Type fr mre infrmatin. The Circuit Overview Screen has 2 glbal defrst parameters and 1 buttn at the tp f the screen: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

22 Figure 18. Glbal Circuit Parameters Maximum Number f Cncurrent Defrsts: Each circuit has a defrst parameter called Observe Cncurrency, which gives the circuit the ability t participate in defrst cncurrency with ther circuits. The parameter set here defines the number f defrsts that can be active at any ne time fr the circuits that bserve cncurrency (the circuit s Observe Cncurrency parameter has been set t Yes ). Once the maximum limit is reached the system will delay additinal defrst requests, fr the cncurrent circuits, until ne (1) r mre f the active defrsts terminate. If a user frces a circuit int Emergency Defrst, then it will ignre the cncurrency limit and g int defrst immediately. An Emergency Defrst will als ignre the temperature terminatin setpint, and defrst fr the maximum time duratin. CMS Display Delay After Defrst: When a circuit is using the Nvar CMS mdule, during a defrst it s temperature reading will be suppressed and the display will shw DEF. This parameter defines hw lng after a defrst cycle it will cntinue t suppress the temperature display. This delay will apply t all CMS mdules cnfigured in the CMS Mdule Pints sectin f the Defrst Ntificatin tab f each circuit within the circuit grup. Defrst Schedules buttn: This will advance yu t a glbal verview f all defrst schedules. The varius clrs used n this verview are adjustable by clicking n them at the bttm f the screen. Duble-click n any f the defrst schedules n this screen t prceed t its detailed schedule times. The additinal defrst parameters fr each circuit are as fllws: Sync Defrst T - If this circuit is t defrst at the same time as anther circuit, use this field t define which circuit t fllw. In ther wrds, if tw (2) r mre circuits share a defrst cntactr, then yu can synchrnize their defrst cycles by selecting ne as the master and ne r mre as the slave defrsts. If this defrst is a slave, then its parameters are readnly and can nly be adjusted via the master defrst t which it is synchrnized. Defrst Type This allws the user t select the type f defrst required by the circuit. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

23 Max Defrst Time This specifies the maximum time a defrst cycle can run if an early terminatin (n temperature) is nt accmplished. This als specifies the time an emergency defrst cycle will run. If this is a dual temp circuit, a secnd max time is ffered fr when the circuit is perating in the MT mde. Min Defrst Time This specifies that the defrst cycle will nt be allwed t terminate until this minimum amunt f time has expired. Terminatin Setpt This is used fr the temperature terminatin f the defrst cycle. Define the terminatin setpint. If it is a Dual Temp circuit, a secnd terminatin setpint is ffered fr terminating the circuit when it is set in the Medium Temp psitin. Def Term Type This defines which sensrs are t be used t terminate the defrst cycle. If there is mre than ne (1) sensr, then chse whether t terminate n the minimum (all abve terminatin setpint), maximum (any abve terminatin setpint), r average temperature. Defrst Sched Type This allws the user t chse either Fixed Schedule (user defined defrst schedule) r Defrsts Per Day (autmatic scheduling). If Fixed Schedule is selected, then a nneditable field appears t display Events per Day. If Defrsts Per Day is selected, then a field appears fr the user t define hw many defrsts per day are t be perfrmed (tw fields are displayed if Dual Temp Switch is enabled). A Start Time field will als appear t enter the start time f the first defrst f the day. It will autmatically spread the remaining defrsts evenly thrughut the day. Evap Fan During Def If yu are cntrlling an evapratr fan n this circuit, define the state that yu want the fan t be in during the defrst cycle. If yu are nt cntrlling the fan, this setting is irrelevant. EEPR during Defrst (Standard, Secndary Lp r rcc.1081 DX System EEPR Circuit nly) If the user is cntrlling an EEPR with this circuit, define whether t keep it pen r clsed during a defrst cycle. Defrst Override This is the same functin as the verride that is ffered n the circuit verview screen. Yu can chse t Frce a Defrst, Terminate a Defrst, r perfrm an Emergency Defrst. An Emergency Defrst will ignre the maximum number f cncurrent defrsts and g int defrst immediately. It will als ignre the temperature terminatin setpint and remain in defrst fr the full time duratin specified by the Max Defrst Time. Drain Delay Time - When the defrst heater turns ff, define a time delay befre the liquid line slenid can turn n. This parameter is nly available when the Defrst Type is set t Electric r Ht Gas. Pump Out Delay This defines a time delay between when the LLSV turns ff and the defrst heater turns n. This is als referred USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

24 t as the Pump-dwn delay. This parameter is nly available when the Defrst Type is set t Electric r Ht Gas. Evap. Fan Delay Time This defines a time delay fr the fan. This delay begins when the LLSV turns n (when the drain time has expired). This parameter is nly available when the Defrst Type is set t Electric r Ht Gas. Observe Cncurrency As mentined earlier, this sets whether this circuit will bserve the maximum number f cncurrent defrsts. If left at N it will g int defrst regardless f hw many ther defrsts are currently active. Case Settings These parameters are nly present if a Case Cntrller has been added t the circuit. This is dne in the Case Cntrllers tab. Defrst Interval This sets the time interval fr the defrst cycle in the event that the cntrller ges int cmmunicatin lss and cannt receive its defrst cmmand frm the circuit. Evap Fan Delay Temp This defines the temperature that the case must drp belw fr the evapratr fan t turn n after a defrst cycle. This prvides a drip time t prevent water drplets frm blwing nt fd prducts at the end f a defrst cycle. Defrst n Term Sensr When set t Yes allws the case cntrller t terminate its defrst cycle based n its lcal defrst terminatin temperature sensr reading. When set t N the case cntrller will fllw the circuit s defrst cycle fr terminatin. I/O Setup buttn This allws yu t set up input and utput pints that can be used fr defrsting. These pints include Defrst Terminatin Sensr(s), Defrst Digital Terminatin Input(s), Evapratr Fan Output(s) and Defrst utput(s). It is nt required t fill them all in nly the nes that are required fr the functinality f this circuit. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

25 Defrst Schedule If yu have chsen t use Fixed Schedule fr defrst scheduling, clicking n the buttn fr Defrst Schedule will advance yu t the screen that allws yu t set the defrst schedule fr a 24 hur perid. It appears as fllws: Figure 19. Defrst Schedule Yu can click and drag an area n the schedule t add r mdify the defrst start times. Yu can enter as many start times per day as yu desire. If yu wish t delete ne f the green bars, right-click n it and select Delete Event. One methd f verifying yur desired defrst times is t select the Summary tab. It will display the start and stp times fr a 24 hur perid, but nly the start times are USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

26 relevant. The defrst stp time is determined by either temperature terminatin r the Maximum Defrst Time that has been defined. Glbal Defrst Schedule Overview At the tp and t the right f the circuit verview screen is a buttn labeled Defrst Schedules. Clicking n this buttn reveals the fllwing view: Figure 20. Glbal Defrst Schedule Overview Circuit and Defrst Default Operatins This prvides a cnvenient way t determine if the defrst schedules are crrectly set up fr the entire rack. The clr cdes fr varius cnditins are selectable by clicking n ne f the clr indexes at the bttm f the screen. Yu can access any individual schedule frm this screen by duble-clicking n its rw. Failure f Case Temperature Sensrs If multiple case temperature sensrs are used, any failed sensrs (utside f the fault limits) will be ignred, and the remaining gd sensr readings will be used. If all the case temperature sensrs fail, the cntrl temp will default t 90 degrees, which will cause the circuit t remain n cntinuusly except fr when it ges int defrst. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

27 Failure f Defrst Terminatin Temperature Sensrs If multiple defrst terminatin temperature sensrs are used, any failed sensrs (utside f the fault limits) will be ignred, and the remaining gd sensr readings will be used. If all the defrst terminatin temp sensrs fail, then a default value f -40 degrees will be used, which will cause each circuit t defrst fr the full time duratin (n temperature terminatin). DX Case Cntrl The secnd tab f the circuit detail screen, Case Cntrllers, is used t display infrmatin frm all the assciated rcc.521/rcc.1081 DX Case Cntrllers. The DX Case Cntrllers are usually applied in cnjunctin with the DX System EEPR Circuits, but they culd als be applied t Standard Circuits. The DX Case Cntrller is fr cntrl f the electrnic expansin valve, defrst, and ther case functins. DX Cases are added t the circuit by selecting the tl bx buttn in the upper right crner f the Case Cntrller Status table. After case cntrllers are assigned t a circuit, the screen will appear similar t the fllwing: Figure 21. DX Case Cntrllers Tab Detail USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

28 The tp half f the screen displays a summary f each cntrller that has been added t the circuit. The bttm half f the screen displays the Status and Settings fr an individual case. Selecting the Case name in the heading f the table will update the bttm half f the screen with the status and settings fr the selected case. Right-click n a Case Name t change the name f the case r t delete the case. RCC DX Case Click n the flder t the right f this setting t define the path t the hardware mdule (rcc.521 r rcc.1081 DX Case Cntrller). RCC DX Case Cntrl Status The infrmatin in this area is fr mnitring purpses nly. Muse ver the pint value and select t view the histry and/r alarm infrmatin fr the pint. Fr sme pints, Super Heat Reading, Defrst Status, Evap Fan Status, and Valve Psitin, there is a right-click ptin t add an alarm; muse ver the pint s value and then rightclick t see Add Alarm. Once the alarm has been added the right-click ptin is ignred. Maintenance Switch Input T cnfigure the Maintenance Switch Input fr the case, muse ver the value and select. A pp-up windw will be displayed allwing cnfiguratin f the pint. Muse ver and rightclick n the value t verride the input, add a histry r add an alarm t the pint. RCC DX Case Temperature Cntrl Settings: Suctin Pressure Offset This is used t calibrate a suctin pressure sensr. Superheat Setpint This is used t enter the amunt f superheat fr the EEV t maintain. Valve Type This is the valve type f the EEV. Fr rcc.1081 DX Cases the EEV stepper mtr type is preset based n the valve type. If a Custm valve is selected the Uniplar/Biplar setting is cnfigurable. Refrigerant Type This is selected frm the available list. If yur refrigerant is nt n the list, select ne that has a similar pressure-temperature relatinship in the temperature range f the evapratr cil. Aut Pressure Transducer This allws manual selectin f a pressure transducer if the aut pressure transducer selectin pint is placed ut f service. If the aut pressure transducer selectin pint is nt ut f service, the cntrller assumes the type f PT cnnected t the cntrller based n the refrigerant type selected. Fr example, if the refrigerant type is R410A then a 300 PSI transducer is assumed, etc. The aut pressure transducer selectin pint is a BACnet pint n the rcc.521 that carries an ut-f-service flag. Thermstat Mde Cntrl This cntrls whether r nt USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

29 thermstat mde is enabled. If enabled, the EEV is allwed t cntrl discharge air temperature based n the thermstat mde cut-in and cut-ut temperatures. If disabled, the RCC will cntrl the valve slely based n superheat. Hwever, if there has been n cmmunicatins with the xcm.20 fr mre than 2 minutes, the EEV will autmatically attempt t cntrl the discharge air temperature. Therefre, it is a gd idea t enter Cut-in and Cut-ut values that it will use at least during cmmunicatin lss. Thermstat Mde Cut-in This sets an upper limit temperature fr the case while thermstat mde is in effect. Thermstat Mde Cut-ut This sets the lw-limit shutdwn temperature pint fr the case while the thermstat mde is in effect. Blended Air Temp Rati (rcc.1081 nly) This specifies the rati f discharge air temperature t return air temperature fr the blended air temperature calculatin. Apply Settings t ALL 521 Cases This buttn appears when mdifying the temperature cntrls settings f an rcc.521 case and multiple cases exist within the circuit. This gives the user the ability t mdify the Temperature Cntrl Settings f ne rcc.521 case and apply the values t all f the rcc.521 case cntrllers cnfigured in the circuit. Apply Settings t ALL 1081 Cases This buttn appears when mdifying the temperature cntrl settings f an rcc.1081 case and multiple cases exist within the circuit. This gives the user the ability t mdify the Temperature Cntrl Settings f ne rcc.1081 case and apply the values t all f the rcc.1081 case cntrllers cnfigured in the circuit. EEV PID This buttn allws the user t enter the P, I, and D cnstants. Their explanatin ges beynd the scpe f this dcument. Yu can als enter the minimum and maximum valve psitins, as well as the step rate and number f steps fr the stepper mtr that is n the EEV. Selecting this buttn will pen a windw as fllws: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

30 Figure 21-b. EEV PID Parameters RCC DX Case Defrst Cntrl Settings Defrst Operatin when using the rcc.521 r rcc when there is ne RCC circuit cntrller and multiple RCC case cntrllers n a circuit, they must all wrk tgether t accmplish defrst. The circuit (using the RCC circuit cntrller) is the master defrst cntrller, and the RCC case cntrllers are the slave defrst cntrllers. The circuit starts the cycle, and the cases fllw. Hwever, if a case reaches its defrst temperature terminatin setpint befre the circuit ends the cycle, the case cntrller will turn ff its defrst utput. Hwever, it will nt resume cling until all the ther case cntrllers have cmpleted the defrst cycle and the circuit cmmands them int the drain cycle and subsequent cling cycle. NOTE! The case cntrller defrst settings are inherited frm the circuit. They are shwn n the case cntrller screen nly fr reference. If yu wish t adjust them yu must d s at the circuit level. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

31 Secndary Lp Case Cntrl The secnd tab f the circuit detail screen, Case Cntrllers, can als display infrmatin frm all the assciated rcc.1081 Secndary Lp Cntrllers. The rcc.1081 Secndary Lp Cases can nly be added t a Secndary Lp Circuit. RCC-1081 s can be created in 2 ways: ne way is with a LLSV (digital) utput fr n/ff cntrl, and the ther way is with a SFV (secndary fluid valve) fr analg cntrl f a mdulating fluid valve. After case cntrllers are assigned t a circuit, the screen will appear similar t the fllwing: Figure 21-b: Secndary Lp Cases Tab Detail with Secndary Fluid Valve Cntrl Settings The tp half f the screen displays a summary f each secndary lp case cntrller that has been added t the circuit. The bttm half f the screen displays the Status and Settings fr an individual case. Selecting the Case name in the heading f the table will update the bttm half f the screen with the status and settings fr the selected case. Right-click n a Case Name t change the name f the case r t delete the case. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

32 RCC Secndary Lp Case Click n the flder t the right f this setting t define the path t the hardware mdule (rcc.1081 Secndary Lp Cntrller). RCC Secndary Lp Case Cntrl Status The infrmatin in this area is fr mnitring purpses nly. Muse ver the pint value and select t view the histry and/r alarm infrmatin fr the pint. Fr sme pints, Defrst Status, Evap Fan Status, and Valve Psitin, there is a right-click ptin t add an alarm; muse ver the pint s value and then right-click t see Add Alarm. Once the alarm has been added the right-click actins is ignred. Maintenance Switch Input T cnfigure the Maintenance Switch Input fr the case, muse ver the value and select. A pp-up windw will be displayed allwing cnfiguratin f the pint. Muse ver and rightclick n the value t verride the input, add a histry r add an alarm t the pint. LLSV Temperature Cntrl Settings (On/Off Fluid Valve): Figure 21-d: LLSV Valve Temperature Cntrl Settings Thermstat Mde Cntrl Always active fr this type f cntrl. Therefre this field is displayed but cannt be adjusted. Thermstat Mde Cut-in The slenid valve will turn n when the temperature rises t this setpint. Thermstat Mde Cut-Out The slenid valve will turn ff when the temperature drps t this setpint. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

33 Figure 21-e: Secndary Valve Temperature Cntrl Settings Thermstat Mde Cntrl This cntrls whether r nt thermstat mde is enabled. This functin can be used as a lw limit safety fr the mdulating SFV. Operating Setpint - The secndary fluid valve will turn n when the temperature rises t this setpint. This setpint is imprted frm the circuit parameters, and is displayed here nly fr reference. Valve Cut-Out - The secndary fluid valve will mdulate t maintain this setpint. This setpint is imprted frm the circuit parameters, and is displayed here nly fr reference. Valve Type Frm the drp-dwn list, select the type f SFV (secndary fluid valve) that is t be used. If the valve yu are using is n the list, the valve number f steps and step rate will be autmatically entered and cannt be changed. If the valve yu are using is nt n the list, select custm and manually enter the number f steps and step rate. P, I, and D Cnstants The PID cnstants are entered as necessary. Higher numbers result in faster valve respnse but may cause hunting. Minimum Output This is the minimum psitin that the SFV is allwed t g when it is clsed. Maximum Output This is the maximum psitin allwed fr the SFV. RCC Secndary Lp Defrst Cntrl Settings Defrst Operatin when using the rcc.521 r rcc when there is ne RCC circuit cntrller and multiple RCC case cntrllers n a circuit, they must all wrk tgether t USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

34 accmplish defrst. The circuit (using the RCC circuit cntrller) is the master defrst cntrller, and the RCC case cntrllers are the slave defrst cntrllers. The circuit starts the cycle, and the cases fllw. Hwever, if a case reaches its defrst temperature terminatin setpint befre the circuit ends the cycle, the case cntrller will turn ff its defrst utput. Hwever, it will nt resume cling until all the ther case cntrllers have cmpleted the defrst cycle and the circuit cmmands them int the drain cycle and subsequent cling cycle. NOTE! The case cntrller defrst settings are inherited frm the circuit. They are shwn n the case cntrller screen nly fr reference. If yu wish t adjust them yu must d s at the circuit level. Defrst Ntificatin I/O Overview Data Lgs The third tab f the circuit details screen is named Defrst Ntificatin. There are three Nvar cntrllers that mnitr case temperature and prvide a digital display f the temperature the CMS (Case Management System), the rcc.521, and the rcc Any RCC s that are already assigned n the Case Cntrllers tab are linked int the circuit. Hwever, if there are additinal CMS r RCC mdules used nly fr their temperature readings, then they must be linked int the circuit s that during a defrst cycle the digital temperature displays will shw DEF rather than an elevated temperature reading. The furth tab f the circuit detail screen (I/O Overview) prvides a summary f all I/O pints that have been assigned t this circuit fr cntrl and mnitring. Yu can duble-click n any pint t view and adjust its alarm and data lg parameters. The last tab f the circuit verview screen (Data Lgs) displays all the critical data lg pints that are assciated with this circuit. Yu can click and drag ver a prtin f the screen (either vertically r hrizntally t expand a prtin f the data lg. Yu can cntinue t expand prtins f the data lg until yu are at a sufficient level f detail fr yur purpses. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

35 Cmpressr Cntrl Thery and Descriptin f Algrithms Cmpressr Staging Fixed and variable speed cmpressrs and unladers can be cmbined in different ways t achieve different lad capacities, r stages. The stages can be defined either manually r autmatically. In Opus, the staging algrithm maintains the suctin pressure r temperature at the setpint by adjusting its stages. Staging f the cmpressrs is driven by an underlying PID lp that ranges frm 0 t 100%, which crrespnds with the ttal capacity f the rack. The utput f the PID is cmbined with autmatic cycle cntrl features t match the rack capacity t the rack lad. Other details f cmpressr staging: Cmpressrs f equal capacity will autmatically equalize their run times. The stepping f stages is nt linear. If the suctin pressure is changing rapidly it may skip stages. Fr example, it may skip frm stage 2 t stage 5 if necessary t match a rapidly changing lad. If a variable speed cmpressr is part f the suctin grup, it will be mdulated autmatically by the main rack PID lp. Stage 0 (zer) is when all cmpressrs (including variable speed) are Off. If there is 1 variable speed cmpressr, it will be n with every stage greater than zer. The variable speed cmpressr is used t trim the rack capacity t match the refrigeratin lad. Opus cmpressr cntrl is fully cmpatible with Cpeland Scrll Digital and Cpland Discus Digital cmpressrs. Cld Start - Recvery after a rack shut-dwn due t phase lss, pwer failure, etc., is a special case where the ramp up time is limited (called the Ramp n Restart Time ). This is t prevent all cmpressrs frm turning n at the same time. It s pssible t define a rack with mre than 1 variable speed cmpressr. In this situatin it will use the largest capacity VS cmpressr first t trim the rack pressure befre attempting t use the next largest VS cmpressr. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

36 Cmpressr Cnfiguratin Figure 22. Cmpressr Grups While n the Cmpressr Grups tab, right-click n the tl bx buttn (highlighted abve) and select Add Cmpressr Grup. Give it a brief name such as MT Cmpressrs and define hw many fixed speed and variable speed cmpressrs are n the rack. This will create a cmpressr verview screen like that shwn abve. This screen is used fr mnitring the system nce it is prgrammed and dwnladed. T prgram the cmpressrs, duble-click n the cmpressr grup name (in this example MT Cmps ). This pens a windw that cntains 5 tabs, as shwn belw: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

37 Figure 23. Cmpressr Overview NOTE! The fllwing descriptin f cntrl settings will be based n a DX rack. Hwever, they can be made t als wrk well n a secndary system. Fr a secndary system, instead f selecting a suctin pressure input as the primary rack cntrl pint, select what yu need like the temperature sensr f the secndary fluid. Then when defining the setpints, enter the temperature setpint instead f a psi setpint. Cmpressr Overview The first tab (Overview) is used t enter the base setpints fr cmpressr cntrl: Setpint enter the base setpint fr suctin pressure cntrl. If this is a secndary rack, enter the temperature setpint fr the secndary fluid. Prf Delay When a cmpressr is cmmanded n, if there is an amperage sensr r digital status pint n the cmpressr, it will use the input t verify that the cmpressr has turned n after the prf delay timer has expired. After the prf delay, if it des nt sense cmpressr amperage (r a cntact clsure), the cmpressr status will change t Fault and the cmpressr will be turned ff. Fault Lckut Time If a cmpressr ges int fault and is turned ff, it will autmatically re-try t start this cmpressr after the fault lckut time has expired and the staging lgic requires it. When it USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

38 attempts t re-start, the Fault message will disappear, and the Prf Delay will begin again. Discharge Lckut (L/O) Setpint define the discharge pressure setpint that will cause all cmpressrs t turn ff fr a specified perid f time. This is a high limit safety. Discharge L/O Timer define the time perid that all cmpressrs will shut dwn fr when the discharge lckut setpint has been exceeded. Suctin Flat Cnfiguratin The secnd tab is fr cnfiguratin f Suctin Flat. This is a functin that raises the suctin pressure setpint in a cntrlled way, as lng as the target circuits maintain their temperature setpints. It is an energy saving feature because the cmpressrs use less energy when the suctin setpint is higher. Suctin Flat can als result in fewer cmpressr cycles, because it helps t match the rack capacity t the refrigeratin lad. Users can select the target circuits/cases and the parameters that enable and disable suctin flat. Figure 24. Suctin Flat Tab Use Suctin Flat? Set t Yes r N. If yu set it t yes, yu must use the tl bx buttn in the lwer sectin (Circuit Delta Pints) upper right crner f the bx t select which circuits will participate in flat. Click n it, and then select Add Circuit Delta Pints. Yu can select all the circuits, r a sub-set such as the nes with the lwest temperature setpints. Hld dwn the Ctrl r Shift keys while using the muse t make multiple selectins at nce. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

39 NOTES! Max Flat Up Setpint define the maximum amunt that yu will allw flat t raise the suctin setpint. Flat Recalc Timer - this is hw ften it will lk at the maximum Delta and re-calculate the suctin setpint. Flat Step Up hw many psi can the setpint be raised each time it recalculates? Fr example, if the Recalc Timer is 2 minutes and the Step Up is 1 psi, then it will be allwed t raise the setpint by 1 psi every 2 minutes. Flat Step Dwn hw many psi can the setpint be lwered each time it recalculates? Flat Up - when Flat Delta is less than (<) specify the maximum deviatin frm setpint that must be held (r less) that will allw the suctin setpint t flat up. Flat Dwn - when Flat Delta is greater than (>) specify the deviatin frm setpint (r mre) that will kill suctin flat and mve the setpint back dwn twards the base suctin setpint. Flat Delta Cntrl Type chse t flat based n the ne circuit that has the maximum deviatin frm setpint, r frm the average deviatin frm setpint. When a circuit is in defrst, and fr a recvery perid after defrst ends, it will nt be included in the evaluatin f whether t flat r nt. Specify the time allwed fr recvery fr each circuit. The default time is 60 minutes, but this can be adjusted via a right muse click n the recvery time clumn. During peratin the flat functin will scan all the selected circuits and determine their deviatin frm setpint (Delta). It will enable r disable setpint flat based n the circuit that has the maximum r average deviatin frm setpint, based n which cntrl methd yu have selected. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

40 Cmpressr Staging Figure 25. Cmpressr Staging T begin cnfiguring cmpressr stages, set the Capacity Units t either HP r MBTU. Then n the right side f the screen define the capacity f each cmpressr and unlader. Unladers are defined as negative numbers because when they are energized the cmpressr capacity is reduced. The Cntrl Settings are as fllws: Staging Mde select whether t define the stages Autmatically r Manually. Even when chsing Manual staging, it is recmmended t start with Autmatic. Allw it t fill in the stages autmatically, and then change it back t manual and fine tune yur adjustments. Max Stage Number (manual staging nly) define hw many stages yu want the grid t display. Make sure that the maximum stage that yu specify is the highest capacity stage (max ttal), r it will nt perate prperly. Minimum Increment (autmatic staging nly) t avid stage changes that prvide little benefit, and/r t avid rapid stage changes, specify the minimum increment that must exist between stages. Increasing the increment will result in fewer stages, and decreasing the minimum increment will result in mre stages. Re-Calculate Staging (aut staging nly) when any parameter is changed that affects the capacity r number f stages, a buttn will appear t re-calculate the stages. Press this buttn when it appears. Staging PID this is fr adjusting the PID driver fr rack staging and the variable speed cmpressr. Clicking n this buttn pens a windw where yu can specify the P, I, and D Cnstants. PID thery ges beynd the intended scpe f this dcument. A few tuning tips are shwn belw. They are: Cntrl Directin Direct = increase n rise in cntrlled sensr. Reverse = increase n drp in cntrlled sensr. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

41 Suctin cntrl is Direct. P,I, and D cnstants these cnstants cntrl the rate f change f the rack staging PID lp. Cmplete PID thery ges beynd the intended scpe f this dcument, but in general increasing the P and I values will cause the staging engine t make bigger changes in the stage number each time it re-calculates (see the respnse time, belw). The derivative cnstant is frequently left at zer. Respnse Time this is a critical setting because it determines hw ften the PID lp will re-calculate and allw the stage number t mve up r dwn. If the rack is respnding t fast, increase the respnse time. If it is respnding t slw, decrease the respnse time. Hysteresis (recmmended leaving this alne). Defines the minimum change required in the PID lp t turn a stage n vs. turning a stage ff. Ramp n Restart Time: n a cld start, this limits hw quickly the rack can g frm minimum t maximum. Output Scaling fr the variable speed cmpressr, this is where yu can define the utput cntrl vltage when the cmpressr is at 100% capacity, and when it is at 0% capacity (between 0 and 10). The vltages can be specified in either directin, i.e., 100% culd be 0 vlts, r 100% can be 10 vlts (r any ther specified value). USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

42 Circuit Shutdwn Grups Cmpressr I/O Setup The last tab n this screen is fr defining which circuits are assciated with this grup f cmpressrs, fr the purpses f shutting dwn during a discharge pressure lck-ut r phase lss. Click n the tl-bx buttn in the upper right crner and select Add Circuit Shutdwn Grups. Yu will then be prmpted t navigate t the affected circuit grup(s). This screen is where the sensrs and utput pints specific t this cmpressr grup (suctin grup) are defined: Figure 26. Cmpressr I/O Setup Define the mdule and pint number fr each. Right-click n the clumn labeled Target t define the path t the physical r generalpurpse input r utput pint. Yu can als right-click n the ther parameters t adjust them, i.e., fr Min n/ff timers and t enable r disable histries fr the pints. Alternatively, yu can duble-click n a rw t pen a windw that allws yu t define the path t the input r utput pint and adjust all alarm and lg parameters. It appears as fllws: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

43 Figure 27. Edit Cmpressr Cntrl frm I/O Setup The COS (change f state) Mnitr cunts the number f cmpressrs starts in a 24 hur perid. Yu can als define alarms based n the number f cmpressr starts within a definable time perid. The Runtime Mnitr is a lg f cmpressr and unlader run times in a 24 hur perid. Cndenser Cntrl Thery and Descriptin f Algrithms Air Cled Cndensers: Fr air cled cndensers, Opus ffers many ptins n cntrl methds. The recmmended methd f cntrl is t use an ptimizatin rutine, r setpint flat. The ptimizatin rutine cntrls the head pressure based n maintaining a differential (Delta) between the saturated cndenser temperature (SCT) and ambient temperature. This saves cndenser fan and cmpressr energy by keeping the head pressure as lw as pssible withut driving n fans unnecessarily. Cndenser setpint flat allws users t specify an acceptable pressure range fr the cndenser t perate within under varius cnditins. T help cnfigure the cndenser prperly, as yu select certain ptins nly relevant setpints will be displayed and irrelevant setpints will be hidden. There is flexibility n when fixed speed fans start and stp vs. the cntrl f a variable speed fan. When there is a VFD, users can select whether t have all fans n befre ramping their speed up, r t bring n a fewer number f fans and let them ramp up t 100% befre bringing n additinal fans. This is achieved by where yu set the Cntrl Setpint fr the VFD versus the stage up and stage dwn setpints that cntrl when fans turn n and ff. Fr example: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

44 Table 5. Example f Cndenser Fan Cntrl Cntrl Setpint Stage Up Stage Dwn Result: Fans start at 100% speed at 210 psi. At 185 psi, any number f fans culd be n and mdulating their speed Fans start at minimum speed at 175 psi. At 185 psi, all fans will be n and mdulating their speed. Fan staging (turning n and ff) can be set up with separate stage up and stage dwn setpints, r with a single setpint with a deadband. If yu chse setpint plus deadband, the VFD cntrl setpint will be used, with a deadband, t determine when t stage the fans up r dwn. The VFD will always cntrl directly t the cntrl setpint, with n deadband. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

45 Cndenser Cntrl Methds (9) Table 6. Cndenser Cntrl Methds VFD Mde Disabled (N VFD) Disabled (N VFD) Disabled (N VFD) Standalne Standalne Setpt Flat N Cntrl Mde Staged Setpints N Setpt + Deadband Yes Setpt + Deadband Yes Setpt + Deadband N Staged Setpints Enabled N Staged Setpints Enabled N Setpint + Deadband Enabled Yes Staged Setpints Descriptin Fans turn n and ff using fixed stage up and stage dwn setpints separated by time delays. Fans turn n and ff using a single fixed setpint with deadband, separated by time delays. Fans will turn n/ff at setpint with deadband, but the setpint will flat between the min and max flat values specified. Fans will turn n/ff at setpint with deadband, but the setpint will flat between the min and max flat values specified. External VFD cntrls the fan speed. Fans turn n and ff using fixed stage up and stage dwn setpints. External VFD cntrls the fan speed. Fans mdulate t a fixed cntrl setpint. Fans turn n and ff at the stage up/dwn setpints separated by time delays. Fans mdulate t a fixed cntrl setpint. Fans turn n and ff using single setpint with deadband, separated by time delays. Fans mdulate t maintain setpint, but the setpint will flat between the min and max flat values specified. Fans turn n and ff at the stage up/dwn setpints separated by time delays Cntrl Methd USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

46 VFD Mde Setpt Flat Cntrl Mde Enabled Yes Setpint + Deadband Descriptin Fans mdulate t maintain setpint, but the setpint will flat between the min and max flat values. Fans turn n and ff using the flating cntrl setpint with deadband, separated by time delays. 9 Cntrl Methd USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

47 Cntrl Methd #1 Fans Stage On Stage Up Setpint Pressure Stage Dwn Setpint Fans Stage Off Figure 28. Cntrl Methd #1 Table 7. Cntrl Methd #1 VFD Mde Setpt Flat? Cntrl Mde Descriptin Disabled (N VFD) N Staged Setpints Fans turn n and ff using fixed stage up and stage dwn setpints separated by time delays. Cntrl Methd #2 Pressure Deadband Fans Stage On Fans Stage Off Setpint Figure 29. Cntrl Methd #2 Table 8. Cntrl Methd #2 VFD Mde Disabled (N VFD) Setpt Flat? Cntrl Mde N Setpt + Deadband Descriptin Fans turn n and ff using a single fixed setpint with deadband, separated by time delays. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

48 Cntrl Methd #3 Pressure Deadband Fans Stage On Fans Stage Off Setpint Setpint Flats Up/Dwn Figure 30. Cntrl Methd #3 Table 9. Cntrl Methd #3 VFD Mde Disabled (N VFD) Setpt Flat? Cntrl Mde Yes Setpt + Deadband Descriptin Fans will turn n/ff at setpint with deadband, but the setpint will flat between the min and max flat values specified. The nly difference between N VFD (abve) and Stand-alne VFD (belw) is that fr a stand-alne VFD, the mnitring screen adds the ability t see the Fan Speed Feedback and a VFD Fault input frm the external VFD. Cntrl Methd #4 Pressure Deadband Fans Stage On Fans Stage Off Setpint Setpint Flats Up/Dwn Figure 31. Cntrl Methd #4 Table 10.Cntrl Methd #4 VFD Mde Standalne Setpt Flat? Cntrl Mde Yes Setpt + Deadband Descriptin Fans will turn n/ff at setpint with deadband, but the setpint will flat between the min and max flat values specified. External VFD cntrls the fan speed. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

49 Pressure Pressure ORL User Guide Cntrl Methd #5 Fans Stage On Stage Up Setpint Cntrl Setpint Stage Dwn Setpint Fans Stage Off Figure 32. Cntrl Methd #5 Table 11. Cntrl Methd #5 VFD Mde Setpt Flat? Cntrl Mde Descriptin Standalne N Staged Setpints Fans turn n and ff using fixed stage up and stage dwn setpints. External VFD cntrls the fan speed. Cntrl Methd #6 Fans Stage On Stage Up Setpint Cntrl Setpint Fan Speed Mdulates at Cntrl Setpint Stage Dwn Setpint Fans Stage Off Figure 33. Cntrl Methd #6 Table 12. Cntrl Methd #6 VFD Mde Setpt Flat? Cntrl Mde Descriptin Enabled N Staged Setpints Fans speed mdulates at the cntrl setpint. Fans turn n and ff at the stage up/dwn setpints separated by time delays. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

50 Cntrl Methd #7 Fans Stage On Pressure Deadband Cntrl Setpint Fan Speed Mdulates at Cntrl Setpint Fans Stage Off Figure 34. Cntrl Methd #7 Table 13. Cntrl Methd #7 VFD Mde Setpt Flat? Cntrl Mde Enabled N Setpint + Deadband Descriptin Fans mdulate t a fixed cntrl setpint. Fans turn n and ff using single setpint with deadband, separated by time delays. Cntrl Methd #8 Fans Stage On Stage Up Setpint Pressure Cntrl Setpint Setpint Flats Up/Dwn Fan Speed Mdulates at Cntrl Setpint Stage Dwn Setpint Fans Stage Off Figure 35. Cntrl Methd #8 Table 14. Cntrl Methd #8 VFD Mde Setpt Flat? Cntrl Mde Descriptin Enabled Yes Staged Setpints Fans mdulate t maintain setpint, but the setpint will flat between the min and max flat values specified. Fans turn n and ff at the stage up/dwn setpints separated by time delays. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

51 Cntrl Methd #9 Pressure Deadband Fans Stage On Cntrl Setpint Fans Stage Off Setpint Flats Up/Dwn Fan Speed Mdulates at Cntrl Setpint Figure 36. Cntrl Methd #9 Table 15. Cntrl Methd #9 VFD Mde Setpt Flat? Cntrl Mde Enabled Yes Setpint + Deadband Descriptin Fans mdulate t maintain setpint, but the setpint will flat between the min and max flat values specified. Fans turn n and ff using the flating cntrl setpint with deadband, separated by time delays. Water Cled Cndensers There are tw different evaprative cntrl mdes fr the fan PID lp and fan staging lgic: based n either wet-bulb temperature r water sump temperature. The wet-bulb mde cntrls the discharge pressure (r drp leg pressure) f the evaprative cndenser t a flating setpint based n the sum f a wet-bulb temperature and the cndenser design delta temperature value cnverted t a pressure. Operatin f the evaprative cndenser in the wet-bulb cntrl mde is similar t the aircled perating mde except that split valve cntrl is nt prvided. The evaprative cndenser cnfigured fr water sump temperature cntrl mde takes the temperature f the water sump and feeds that directly int the fan PID lp and fan staging lgic. The setpint fr the variable speed fan is a fixed temperature. The fan stager will cntrl t the same setpint and a deadband value as in the air-cled cndenser. As the water sump temperature increases the fan speed and staging increase t match the cndenser s capacity t the system lad by maintaining the water sump temperature at the setpint. Flat lgic is nt prvided in this mde. Sensr fault lgic watches the water sump temperature input r inputs and can trigger a cndenser bypass mde similar t that f the air-cled cndenser. There is ne setpint that is unique fr water cled cndensers. It is the Fast Recvery Setpint. Fr it, specify the discharge pressure setpint that will immediately drive the fans t full peratin. This is an emergency verride t prevent a high pressure lck-ut cnditin. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

52 Water Pump Cntrl The water pump cntrl lgic is respnsible fr peridically cycling tw water pump utputs t maintain a run time balance between them. Each water pump utput selectr maintains a run time accumulatr that prvides the run time in hurs and tenths f hurs. The water pump cntrl watches the run time accumulatr f the currently running pump and when it sees that the accumulated run time has exceeded the switchver time setting the cntrl will turn ff that pump utput and turn n the ther. It then watches the ther water pump utput s run time and makes a switch when that run time exceeds the setting and the cycle repeats. The pump that was turned ff will have its run time accumulatr cleared t 0.0 hurs. The cndenser samples the water pump run time nce a minute and is independent f the system clck. If nly ne water pump has been cnfigured the cntrl will attempt t keep it n cntinuusly. Als, n water pump switch ver will ccur if the switchver time setting is set t 0.0 hurs. A phase lss will shut dwn the water pump utputs. As the phase lss is remved the pump utput with the lwest run time will be turned n. A pump lckut prperty disables the run time balancer and turns ff all f the water pumps similar t the phase lss respnse. This prperty is used when cnditins such as utdr air temperature indicate that the pumps shuld be stpped due t freezing r that there is n water left in the sump t pump. A pump verride prperty disables the run time balancer and turns n all water pumps. This prperty is used if a pump failure has been detected such as n flw. The pump lckut prperty has pririty ver the pump verride. The lckut and verride prperties wuld be externally managed by universal cntrls r ther wire sheet lgic. Water pump cntrl lgic is nt executed while the cndenser perating mde is set t air-cled type. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

53 Cndenser Cnfiguratin On the base Refrigeratin Cntrl Screen (the tp level f tabs), click n Cndensers. The left side f the screen will pen a windw that is used t create cndensers. Click n the tl bx buttn in the upper right crner f this bx and select Add Cndenser : Figure 37. Cndenser Cnfiguratin Figure 38. Add Cndenser Cntrl Give it a name and define the number f fans and whether there are any split valves. Yu can als create it as an Evaprative Cndenser, but these instructins nly review the set-up fr an air cled cndenser. The chices fr VFD cntrl are: Enabled cndenser is cntrlled by a VFD that will be cntrlled by Opus Disabled - there is n VFD cntrl n the cndenser Stand-alne select this if there is a VFD, but it is nt under the cntrl f Opus. Opus can be set up t respnd t a VFD Bypass cnditin. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

54 The fllwing cndenser verview is the result f defining a 6 fan 1 split valve, VFD cntrlled cndenser: Figure 39. Cndenser Overview T cnfigure the setpints, duble-click n Cndenser (highlighted abve) n the left side f the screen t pen a pp-up windw: Figure 40. Cndenser Detail Overview The tp sectin is fr mnitring the status f the cndenser while yu adjust the setpint. Many f the setpints nly appear when they are relevant t the type f cnfiguratin specified. Fr example, if there is n VFD, then VFD Parameters disappears. A descriptin f all the setpints is as fllws: Cndenser Cnfiguratin Cndenser Type Select Air Cled, Evaprative Wet USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

55 Bulb, r Evaprative Water Sump. Refrigerant Type select this t match yur system. It is used in setpint flat applicatins t calculate the saturated cndenser temperature using the pressure sensr. Number f Fans define. VFD Fan Cntrl Enabled, Disabled, r Stand-alne. Stand-alne means that there is a VFD, but it is nt cntrlled by Opus. Stand-alne differs frm Disabled in that the mnitring screen will display the VFD fault and Fan Speed Feedback frm the stand-alne VFD. Number f Split Valves define. Setpint Parameters Cntrl Input Type Select Saturated Cndenser Temp, Discharge Pressure, r Drp Leg Pressure. SCT is a dedicated temperature sensr that is n the cil f the cndenser. If Discharge Pressure r Drp Leg Pressure are selected, setpint flat cnverts the selected pressure sensr int the SCT. Use Setpint Flat select Yes r N. Min Setpint when flat is used, define the minimum pressure setpint that the cndenser is allwed t perate at. Max Setpint when flat is used, define the maximum setpint. At and abve this pint, all fans will be n 100%. Cndenser Delta when flat is used, it perates t maintain the saturated cndenser temperature at a temperature abve the utside air temperature, called the Delta. Define the desired delta. Use Ht Gas Defrst Yes r N. If yes, then an alternative minimum pressure setpint can be defined t be used while a ht gas defrst is in effect. Use Heat Reclaim Yes r N. T be able t set it t Yes, there must be a valid heat reclaim input defined n the I/O Setup f the Rack. Fan Parameters Cntrl Mde Define whether yu want t cntrl fan cycling with separate stage up/stage dwn setpints, r a single setpint with a deadband. Refer t the Cndenser Cntrl Methds diagrams fr mre infrmatin n the differences in these chices. Stage Up Setpint abve this pint, the fans will stage up, separated by the stage up time delay. Stage Dwn Setpint belw this pint, the fans will stage dwn, separated by the stage dwn delay. Stage Up Delay if the pressure rises abve the Stage Up setpint and remains there, this is the amunt f time separating the turning n f multiple fans. Stage Dwn Delay if the pressure drps belw the Stage Dwn setpint and remains there, this is the amunt f time separating the turning ff f multiple fans. Cntrl Deadband when cntrlling the cndenser t USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

56 Setpint & Deadband, this deadband will be split half abve, and half belw the setpint. Apprach Lckut Setpint and Apprach Interval t prevent rapid cycling f the cndenser fans, if the cndenser pressure is abve setpint, fan staging can be inhibited (lcked) if the pressure is decreasing twards the setpint. Als if the pressure is belw setpint but rising, staging can be inhibited. Define the amunt that the pressure must fall and the time interval. Fr example, a Lckut Setpint f.5 with a time delay f 10 secnds means that if the pressure is appraching setpint at a rate f.5 psi every 10 secnds, staging will be inhibited. First Fan Lck-On If enabled, the first fan will always be n, except during a phase lss shut-dwn. VFD Parameters Fault Retries and Retry Delay If a VFD Fault signal is received (cntact clsure f the VFD Fault input), define the time delay and the number f re-tries fr the start/stp signal f the variable speed fan, befre it will g int VFD bypass. Bypass Parameters On Abve Define the cndenser setpint abve which the VFD will be bypassed, putting the fans at 100% f their speed. Off Belw if bypass becmes enabled, define the pressure setpint belw which bypass will be disabled. Sensr Fault Delay if the cndenser pressure sensr ges int fault (lss f signal), define the time delay befre the VFD will be put int bypass. Split Valve Parameters Split Cntrl Type chse whether t split the cndenser based n pressure (PSI) r utside air temperature (OAT). Split On Belw / Split On Delay what is the cndenser pressure and time delay belw which the cndenser will split? Split Off Abve / Split Off Delay what is the cndenser pressure and time delay abve which a cndenser split will be terminated? Split n Heat Reclaim? Yes r N. Split Valve XX %Cil when the split valve energizes, what percentage f the cndenser cil becmes dead? If there is mre than ne split valve, yu will have a field value fr each ne. Edit VFD Fan PID Values: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

57 Figure 41. VFD Fan PID Values Cntrl Directin Direct = increase n rise in cntrlled sensr. Reverse = increase n drp in cntrlled sensr. Discharge Pressure cntrl is Direct. P, I, and D Cnstants a full explanatin f these cnstants ges beynd the scpe f this dcument, but larger numbers increase the effect f each f these parameters. Setting the numbers t high can cause hunting, and setting the numbers t lw can cause sluggish respnse. Respnse Time hw ften the PID lp will re-calculate. Output at 0% - specify the cntrl vltage, between 0 and 10, where the cndenser fan speed will be at 0%. Output at 100% - specify the cntrl vltage, between 0 and 10, where the cndenser fan speed will be at 100%. Defining Cndenser I/O Pints On the pp-up windw fr a cndenser, there are 2 tabs fr defining varius cndenser I/O pints; Fans/Split Valves, and I/O Setup : USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

58 Fans/Split Valves Figure 42. Fans/Split Valves Fr the Fan and Split Valve Outputs, there are tw ways that yu can set up the required parameters. Yu can either right-click n each parameter directly n the verview screen, r duble-click n a rw t pen a pp-up windw that allws setting all the parameters fr an individual utput pint. A Split Fan Relay is an additinal utput pint that can be energized whenever a cndenser split ccurs. This typically is used t energize a bleed valve that allws refrigerant t drain ut f the dead side f the cndenser. When a Stand-alne VFD is used t cntrl the fan speed, yu can define and view a feedback signal and fault input frm the external drive. The Speed Output is used when Opus is directly cntrlling the VFD. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

59 Cndenser I/O Setup tab Cndenser Default Operatins Figure 43. Cndenser I/O Setup Use the tl bx buttn in the upper right crner f each sectin t add input pints within the varius categries. Remember that the Saturated Cndenser Temp Input is als knwn as the Drp Leg Temperature. Once sensrs are added t this screen, duble-clicking n a sensr (except the Value clumn) will pen a windw where yu can define its fallback value, alarm setpints, and data lg parameters. If the cndenser pressure sensr(s) fail the cndenser will be cntrlled with the utside air temperature sensr t cycle fans and split valves as fllws: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

60 Abve 60 degrees all fans are n and split valves are deenergized Between 45 and 60 degrees 75% f fans will be n Belw 45 degrees 50% f fans will be n Belw 30 degrees cndenser split valves will be energized Abve 35 degrees cndenser split valves will be de-energized It is recmmended that all fans be wired t nrmally clsed relay cntacts, and all split valves be wired t nrmally pen relay cntacts. Cndensing Units If the tab fr Cndensing Units is expsed (see Preparatins ), click n the tab fr Cndensing Units t create, cntrl, and mnitr grups f stand-alne cndensing units. In place f a refrigeratin rack, sme stres use cndensing units. These cntain a cmpressr, cndenser, and liquid line slenid valve that are dedicated t ne circuit. Click n the Cndensing Units tab frm the main Refrigeratin Cntrl screen. It appears as fllws: Figure 44. Cndensing Units Tab Right-click n the tl bx buttn highlighted abve and Add Cndensing Unit Grup. Give the grup a brief name such as LT Cnd Units r even LTCU s. This grup nw appears n the Cndensing Unit verview screen: Figure 45. Cndensing Units Overview Right-click n the tl bx buttn highlighted abve and Add Cndensing Unit. Repeat this prcess until yu have created all the cndensing units. The Cndensing Unit verview screen and the details f each are the same as the screens described earlier fr circuit and USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

61 defrst cntrl. Therefre, refer t the abve sectin, Circuit Overview, fr details n hw t prgram them. Miscellaneus Equipment On the base Refrigeratin Cntrl screen, the Miscellaneus I/O Pints tab is used t create, mnitr, and mdify cntrl strategies fr miscellaneus equipment. These strategies are called Universal Cntrl Strategies and can be applied t any digital r analg utput pint in the system that has nt been assigned t anther cntrl strategy. The Universal Cntrl strategy cntains 4 ptinal cntrl functins, and it s imprtant t understand the pririties f each. These 4 functins are the primary cntrl input, cntrl verride, cntrl lckut, and sequence lckut. Any r all f these cntrl functins can be used alne r tgether. The pririty f each f these can best be highlighted by this drawing: Functinal Pririties within the Universal Cntrl Strategy Cntrl Input Lckut Sequence Output Override Figure 46 Functinal Pririties This drawing highlights hw the verride will take pririty ver the cntrl input. Hwever, the lckut r sequence functins have a higher pririty and will keep the lad turned ff even if the cntrl input r verride functins are turned n. All f the cntrl functins use a sensr plus a setpint except fr sequence lckut. The sequence functin is when this lad is dependent upn the state f anther utput(s) in the system. Example Applicatin: If yu want t turn n a Heat Reclaim Valve if the ht water temperature is belw 105, but yu want t lck it ut if either the discharge pressure is belw 160 r if the master ht gas valve is n. In this applicatin the utput wuld be the heat reclaim valve, and t cntrl it yu wuld use the fllwing functins f the Universal Cntrl Strategy: Cntrl Input used t turn the utput n when the water temperature is belw setpint. Cntrl Lckut used t turn it ff if the discharge pressure was t lw Sequence Lckut used t turn it ff if the master ht gas defrst valve is turned n. In ther wrds, the heat reclaim valve is sequenced t the master ht gas valve being ff. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

62 As yu can see in the abve diagram, either the lckut r the sequence functins wuld take pririty ver the cntrl input functin. In ther wrds, any f them culd turn the heat reclaim ff. Yu begin creating cntrl strategies fr miscellaneus lads by first creating 1 r mre equipment grups t place the lads within. In the bx n the left side f the screen, use the tl bx buttn t Add Equipment Grup. Once yu have a grup created, n the right half f the screen use the tl bx buttn t Add Universal Cntrl Strategy. Once yu have ne r mre defined, the screen will begin t lk like this: Figure 47. Misc Equipment Overview The rw called Output Cntrlled By reveals which f the cntrl functins is currently in cntrl f the lad. Each f the 4 cntrl functins has a separate sectin t reveal which are used and the status f each functin. Duble-clicking n any f the Universal Lads (UL01, UL02, etc.) will pen up the details f its cntrl settings. Fr example: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

63 Figure 48. Misc Equipment Detail Cnfiguratin f a Universal Lad Strategy is as fllws: Cntrl Output Setup: Define the lcatin f the phase lss sensr that will cause this lad t shut dwn, if any. Output Cntrl Type define whether this strategy will cntrl an analg r digital utput pint. Define the target lcatin f the analg r digital utput pint that is t be cntrlled. Use the tlbar buttn in the upper right crner f the utput windw t Add Output. NOTE! These instructins are written arund a digital utput pint. When cntrlling an analg utput pint, yu are given the additinal ptin f what psitin t put the utput in when it is affected by the varius functins Cntrl Pint Setup - There is a tab fr each f the 4 cntrl functins. Yu must g int each functin that yu want t use and set it up. Cntrl Input: Cntrl Type will yu be cntrlling the utput using an analg r digital sensr? USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

64 Cntrl Setpint and Deadband the deadband is split half abve and half belw the setpint. Cntrl Actin - Whichever methd f setpint cntrl yu select, yu can reverse the cntrl actin by setting it t either direct (n abve setpint) r reverse (n belw setpint). Analg Input(s) use the tlbx buttn in the upper right crner f this sectin t Add Cntrl Input t select the cntrl input(s). Cntrl Override: Cntrl Type Enable r Disable Cntrl Override. If enabled, select whether yu will yu be cntrlling the utput using an analg r digital sensr. Override Setpint and Deadband chse whether t use a single setpint with a deadband, r separate cut-in/cut-ut setpints. Override Cntrl Actin - yu can reverse the verride actin by setting it t either direct (n abve setpint) r reverse (n belw setpint). Analg Input(s) use the tlbx buttn in the upper right crner f this sectin t Add Cntrl Input t select the verride input(s). Cntrl Lckut: Cntrl Type Enable r Disable Cntrl Lckut. If enabled, select whether yu will yu be cntrlling the utput using an analg r digital sensr. Lckut setpint and deadband chse whether t use a single setpint with a deadband, r separate cut-in/cut-ut setpints. Lckut Cntrl Actin - Whichever methd f setpint cntrl yu select, yu can reverse the cntrl actin by setting it t either direct (lckut abve setpint) r reverse (lckut belw setpint). Analg Input(s) use the tlbx buttn in the upper right crner f this sectin t Add Cntrl Input t select the lckut input(s). Sequence Lckut: Sequence Cntrl Enable r Disable the sequence functin. If enabled, yu must define at least ne utput pint r it will nt functin. Cntrl State If set t Off, this lad will be turned ff when the utput it fllws turns Off. If set t On, this lad will be turned ff when the utput it fllws turns On. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

65 Sequence On and Sequence Off time delays the sequence n time delay applies t when this lad is allwed t turn n by the sequence functin. The sequence ff time delay applies t when this lad becmes disabled by the sequence functin. Histries The furth tab n the base Refrigeratin Cntrl screen is fr Histries. This prvides a list f all the refrigeratin data lgs. By default, when histries are created they are disabled. Once a system is dwnladed, this screen is a useful place t enable and disable histry pints. It will lk like the fllwing: Figure 49. Refrigeratin Cntrl The buttns at the bttm f the page can be used t enable r disable all histry lgs. In additin t this, yu can use this screen in the fllwing ways: Duble-click n any rw t view the data lg. Use the shift r cntrl keys t select specific items. When they are highlighted, yu can right-click n the clumns fr Pint Grup Name, Enabled, Interval, r Capacity t adjust these items fr the selected rws. Certain types f lgs cannt be disabled, and certain types f lgs cannt have their intervals adjusted. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

66 Yu can srt the screen in different ways by clicking n the clumn headings. If there is a fault message n any histry pint, yu can view the fault cause n this screen. System Tags can be entered n this screen. Alarms The last tab n the base Refrigeratin Cntrl screen is fr Alarms. This prvides a list f all the refrigeratin alarms. By default, when alarms are created they are disabled. Once a system is dwnladed, this screen is a useful place t enable r disable alarms. It will lk like the fllwing: Figure 50. Alarms Highlighting ne r mre rws (by using the Ctrl r Shift keys) allws yu t adjust the 3 clumns labeled Alarm Enabled, Alarm Type, and Alarm Class by right-clicking n the clumn. The buttns at the bttm f the screen allw yu t enable r disable all alarms at nce. Cnfiguring LCD Screens LCD Screens can be generated autmatically. Befre generating the screens, yu must create a driver in the XCM; select XCM Display Netwrk in the Driver Manager drp dwn list. There must be at least ne XCM-LCD created n the netwrk. Once that is dne, yu can autmatically generate LCD screens by right-clicking n the buttn at the left f Refrigeratin Cntrl. Frm the drp dwn menu select Build xcm.lcd. This launches the LCD cnfiguratin screen, as shwn here: USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

67 Figure 51. xcm.lcd Cnfiguratr xcm.lcd Device: An XCM can have a ttal f 4 LCD displays ne internal plus 3 mre external displays. Even if yu nly are using the internal LCD, yu must use the drp-dwn list t select the ne t cnfigure. Hme Screen Title: Enter sme descriptive title like MT Rack fr the display. Cnfigure Nav Buttns: - chse whether t use clr r gray scale icns. Mst LCD s are clr, but it s pssible t have ne that can nly display in shades f black and white. Match this selectin t the type f display that yu have. PNG File selectrs: Fr the remaining items, yu have the ptin f changing the icn that is used n the Hme Screen. Yu als have the ptin f deleting an icn frm the Hme Screen. This is dne by remving the check mark that is t the left f the item. Once yu have made yur selectins, press the buttn t Build xcm.lcd. USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

68 NOTE 1! The aut build functin nly creates screens fr items that have already been cnfigured in the system. Therefre, it is recmmended that yu build the system first, and then create the LCD screens. If yu add new items t the system (like new circuits r cmpressrs), yu shuld re-build the LCD screens NOTE 2! Yu can run a simulatin f the LCD screens n the Opus Supervisr. T d this, n the Nav Tree (left side f the screen), pen the XCMDisplayNetwrk t reveal the name f the LCD s in the system. Right-click n the LCD name and select Run Emulatr. Use the muse t press the buttn f the LCD t prceed deeper int the LCD simulatin. If running the emulatr n a live system, the emulatr will capture the current status f the sensrs and utput pints and display them in the simulatin. Emulatin f LCD Screens Figure 52. Nvar-XCM-LCD USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit

69 Appendix I: RCC-1081 Mdes The RCC-1081 has 6 mdes (applicatins) built-in. The cntrl algrithms fr these mdes are internal t the RCC-1081, s it is capable f stand-alne cntrl in the event f a cmmunicatin failure. Yu must select the desired applicatin at the time yu create the cntrller in the BACnet Device Manager. A descriptin is as fllws: Figure 53: Selecting RCC-1081 Mdes Mde 1: LLSV this is used when a 2-psitin slenid valve (aka: LLSV) is used t start and stp the flw f a secndary fluid (like glycl r CO2) t maintain the case temperature. Mde 2: SFV (Secndary Fluid Valve) this is used when a stepper mtr is used t mdulate the flw f a secndary fluid (like glycl r CO2) t maintain the case temperature. Mde 3: EEV this applicatin is used in a DX case t mdulate an electrnic expansin valve t maintain superheat in an evapratr cil. The EEV wuld use a stepper mtr fr the mdulatin. Mde 4: EEPR used fr a DX circuit when it s temperature is cntrlled by an Electrnic EPR (EEPR) valve (stepper mtr). USER GUIDE 4/8/ Fr the latest technical dcumentatin, visit