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Guardian Controls International
1
RCC20X (C5L2)
Controller for Reciprocating Compressors.
Operation and Set-up Manual
General
Guardian Rcc20X (C5L2) Controller is a self-contained unit requiring a single electrical
supply to control and monitor up to 5 reciprocating compressors, each with motor and 2
loading valves. It provides inputs for pressures, temperatures and plant faults, and mains
outputs for compressor motor and capacity control. Local digital temperature and alarm
display is provided by the Guardian SKD9 key-switch display unit, which also gives access to
all control and configuration parameters. Full RS-485 communications enables the controller
to be integrated into a Guardian Consultant network to provide data logging and alarming.
GUARDIAN Rcc20X ( C5L2)
issue v1.0b 14/08/06
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Table of Contents
Related Manuals for Guardian Controls International RCC20 Series
Summary of Contents for Guardian Controls International RCC20 Series
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Page 1: General
Guardian Controls International RCC20X (C5L2) Controller for Reciprocating Compressors. Operation and Set-up Manual General Guardian Rcc20X (C5L2) Controller is a self-contained unit requiring a single electrical supply to control and monitor up to 5 reciprocating compressors, each with motor and 2 loading valves. -
Page 2: Table Of Contents
Guardian Controls International CONTENTS General ..........................1 Termination and Layout ..................... 3 RCC-20X ‘C5L2’ Input/Output Signals ................3 RCC-20X C5L2 Termination Wiring.................. 5 Compressor control......................6 Condenser control......................7 Getting Started........................8 Hardware configuration checks..................8 SKD.9 Display unit operation................... 9 Configure unit address. -
Page 3: Termination And Layout
Guardian Controls International Termination and Layout RCC-20X ‘C5L2’ Input/Output Signals C5L2 Main Unit Analogue Inputs Terminal P1 LP 23-/24+ Suction Pressure -1 to 24 bar P2 HP 25-/26+ Discharge Pressure -1 to 24 bar P3 SATP 27-/28+ Satellite Pressure -1 to 24 bar... - Page 4 Guardian Controls International C5L2 Extention Unit 1 Digital Inputs Terminal Common Neutral C1 Running /Trip Compressor 1 input 230vac C2 Running /Trip Compressor 2 input 230vac C3 Running/ Trip Compressor 3 input 230vac Not Used 230vac Oil Level Pack oil level alarm/trip...
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Page 5: Rcc-20X C5L2 Termination Wiring
Guardian Controls International Guardian Controls International RCC-20X C5L2 Termination Wiring. KWH PULSE C5L2 4-20mA P3 SATP SATELITE PRESSURE -1 to 24 bar SELECT CPOS FOR LOADING 4-20mA SELECT CNEG FOR UNLOADING P2 H.P DISCHARGE PRESSURE SELECT SON FOR CAPACITY ON DURING START UP... -
Page 6: Compressor Control
Guardian Controls International Controller function. This description is for the C5L2, which controls compressors and condenser fans. Compressor control. Compressors are staged on and off in response to changes in the measured suction pressure. Which compressor is started or stopped depends on the following :- Compressor Start 1. -
Page 7: Condenser Control
Guardian Controls International Condenser control. This is description is for ‘Linear’ fan control. ans Start 1. Discharge pres sure is above control set-point plus dead band. (See Page 28). 2. Stage delay ha s elapsed. (See Page 28). 3. Fan is started in numerical order. -
Page 8: Getting Started
Guardian Controls International Getting Started uardi an Controllers provide refrigeration engineers with • ULTIMATE FLEXIBILITY • ASSURED MONITORING • RELIABLE ALARMS This m anual provides refrigeratio n designers, installers, service mechanics and supermarket personnel with the necessary information to achieve the above objectives. -
Page 9: Skd.9 Display Unit Operation
Guardian Controls International SKD.9 Display unit operation. GUARDIAN controllers require a SKD.9 Keyswitch Di splay unit to be plugged into the lephone jack socket in the controller before any settings can be changed. The SKD.9 is connected to the GUARDIAN controller via a 6-core telephone cable. -
Page 10: Configure Unit Address
Guardian Controls International Configure unit address. Enter Passcode PP05 for normal changes Before any permanent change of controller settings are made then the correct entry of the appropriate passcode is necessary. Most normal system settings require entry of passcode PP05... -
Page 11: Operation
Guardian Controls International OPERATION The SKD.9 Keyswitch display provides a display at the compressors of pack pressures, number of compressors running or tripped etc. Display of other measured values by pressing ’next’ button, the values displayed depend on the unit model selected. - Page 12 Guardian Controls International triP ==11 Motor trip status LEuI ==35 Liquid level % if fitted =St= =-36 Suctio n tem rature if ‘STSH’ =Et= =-38 Equivalent Suction temperature if ‘STSH’ =SH= ===4 Suction superheat temperature if ‘STSH’ LOOP ==74 Compressor VSD Loop output speed 0-100% if...
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Page 13: Trips And Alarms
Guardian Controls International Default Displays The default suction pres sure display Suct =2.3 Suction pressure (-1 to 24barG) is during AUTO or restart sometimes r eplaced by 8888 During restart C5L2 Unit model configuration selected u1.0A (Software version) If unit selected OFF... -
Page 14: Alarms
Guardian Controls International Digital Trips Individual compressor trips:- C-1 SFtY Compressor one tripped. This is a result of the run signal no t being present after the compressor has been started.. C-2 SFtY A similar display is used for all other compressors on the controller with just the compressor number changing. -
Page 15: Mode Change Compressors
Guardian Controls International PC-FAIL ALARM the RCC20 unit is in 'Auto' mode and a valid status request has not been received for 60 seconds via the RS485 highw ay then a Watchdog timer 'PC/FAIL' message is displayed. his alarm is reset if 485 communications are restored or the AGT/SYS5/Locl/nonE is set to 'LocL' or 'nonE' in unit s ettings. -
Page 16: Condenser Fan Display
Guardian Controls International CONDENSER FAN DISPLAY The following displays are available by repeatedly pressing the 'next' button:- diSc 14.5 Discharge pressure FAnS ===3 Number of fans running (No. of fans running changed by raise/lower buttons if HANd selected) dELY ==13... -
Page 17: Mode Change Condensers
Guardian Controls International MODE CHANGE CONDENSERS Pressing 'next' until the condenser mode selections are on display and then pressing 'enter' hanges the condenser mode to the new selection displayed. Auto Auto AUTO control mode with compressor control on di scharge pressure... -
Page 18: Useful Button Sequences
Guardian Controls International USEFUL BUTTON SEQUENCES he following button sequences should prove useful during normal service operation Reset ALARM or TRI triP = .4b RESET Change suction control setpoint and differential SEt= PP00 PP05 cprs c2.0b c2.5b c2.5b cd01 cd02... -
Page 19: Setup Operation
Guardian Controls International SETUP OPERATION Setup operation lasts for a maximum of 5 minutes after being activated by pressing, with CSEt or FSEt on the d isplay panel. On entry t Setup pass de PP0 0 is displayed. To change any settings passcode PP05, PP0 9 or PP11 must be first selected using pushbuttons. -
Page 20: Setup Functions (Normal) Passcode 05
Guardian Controls International Setup Functions (Normal) passcode 05 P05 Menu Press to sequence through the follow ing PP05 Menu selections:- Press to select the displayed menu Compressors Unit Unit Unit model setup RCC-20 Page 21 CPrS CPRS Compressor pressure control setup... -
Page 21: Control Parameter Definitions
Guardian Controls International CONTROL PARAMETER DEFINITIONS. The followi ng list of parameters may be accessed using the Sd9 display unit. Parameters are gro uped under menu headings and may only be changed under pass-code ontrol,(see page 19 for a guide to using the Sd9 to access and navigate the menus). -
Page 22: Compressor Control
Guardian Controls International Comms protocol in use. Guardian Consultant protocol. Sys5 Third Party protocol. Not supported. Locl No communications.(Prevents PC/Fail message on SKd-9) nonE Oil level action.(digital input terminal 6 on extension unit) OiLA Alarm only. OiLt Trip all compressors on the pack. Control will be... - Page 23 Guardian Controls International Cau5 Compressor Algorithm Up. Applied to stage up timer when suction pressure is above con trol setpoint plus the Fast band. The larger this numb er then the greater the stage up delay will be reduced, (a minimum of 6 seconds).
- Page 24 Guardian Controls International MENU: delays (P P05 Pass de level) Controller delays. The se determine when the compressors are started, stopped and how long it has to be off for when stopped. It also includes any other timers used by the controller (dELy as displayed on Sd9).
- Page 25 Guardian Controls International MENU: Suction Pressure Alarms (PP05 Pass code level) Suction pressure alarm limits. (Suct as displayed on Sd9). Menu enu item description item Display L 0. 3 Suction pressure Low alarm, (bar). If the suction pressure falls below this limit all compressors are stopped until the pressure rises above the control setpoint again.
- Page 26 Guardian Controls International MENU: Pack Trip action (PP05 Pass code level) rip as displayed on Sd9). Menu Menu item description item Display Digital trip fail input level definition If compressor digital input is set to run then the compressor will trip if after a time if the signal is n ot present (ie running input signal).
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Page 27: Test Control Outputs
Guardian Controls International Test control outputs? MENU: Test relay outputs (PP05 Pass code level) (tEst as displayed on Sd9). Menu Menu item description item isplay Change relay 1 state. By pressing the ‘Enter’ key on the Sd9 the relay state can be changed. - Page 28 Guardian Controls International MENU: Fans (PP05 Pass code level) Discharge pressure control settings. These determine what pressure the condenser fans are started and stopped at. (FAns as displayed on Sd9). Menu Menu item description item isplay F12.0 Discharge Pressure control setpoint. (Bar gauge).
- Page 29 Guardian Controls International MENU: Discharge Pressure Alarms (PP05 Pass code level) Discharge pressure alarm limits. Anp as displayed on Sd9). Menu Menu item description item Display H15. 0 Discharge pressure High alarm, (bar). If the Discharge pressure rises above this limit a discharge ‘Hi’ alarm is displayed on the Sd9.
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Page 30: Pressure Transducer Scaling
Guardian Controls International Pressure transducer scaling? For the correct compressor control is it important that the connected transducers, P1 P4 on the main unit, are scaled correctly. The scaling data is normally found on the body of the transducer, (Pressures), or from the manufacturers data sheet. -
Page 31: Communications
Guardian Controls International COMMUNICATIONS Communication facilities are available for interrogation of temperatures, status and modification / display of setpoints, limits and timeclock settings. All communication is via a multi-drop RS485 link which connects all GUARDIAN controller units in series. GUARDIAN Rcc20X ( C5L2) -
Page 32: Setup / Commissioning Parameters
Guardian Controls International Setup / commissioning Parameters PP05 Normal Menu Compressor Settings unit ACTUAL Default Min. Max. setting setting setting settings Unit Model for RCC-20 C5L2 C5L2 C5L2 C5L2 Not used this model Std. Std. r485 A3 settings dLEv dLEv... - Page 33 Guardian Controls International dELY Starts per hour SH12 SH02 SH25 Stage up delay mins Su0.2 Su0.2 Su9.9 Stage down delay mins Sd0.2 Sd0.2 Sd9.9 Capacity control delay mins dL0.2 dL0.0 dL5.0 After Stop delay mins dA1.0 dA0.1 dA9.9 Start Period...
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Page 34: Pp05 Normal Menu Condenser Settings
Guardian Controls International PP05 Norm al Menu Cond enser Settings Fan control selection Number of fans Fn00 Fn00 Fn05 Trip input polarity tPoS tnEg tPoS FAnS Fan control setpoint F0.5 F 0.0 F23.0 Control deadband db0.1 db0.1 db5.0 Fast response deadband Fb0.1... -
Page 35: Pp11 Menu - Settings Level 2
Guardian Controls International PP11 Menu - Settings Level 2 Compressors Real time hours rh00 rh00 rh23 Real time minutes mins rt00 rt00 rt59 SCAL Pressure Transducer 1 4ma bar gauge L-01 Pressure Transducer 1 20ma bar gauge Pressure Transducer 2 4ma bar gauge... -
Page 36: Index
Guardian Controls International Index nalogue Alarms ........14 OPERATION ..........11 Analogue ips ........13 PACK AND COMPRESSOR SAFETY BUTTON ERATION SHOR THAND..9 ..........eck Unit M odel ........18 Pack Capacity Manual ......MMUNICATIONS ......31 PC-FAIL ALARM ........15 ompressor Displays ......11... - Page 37 Guardian Controls International Factory Setup for CSA Riyadh PP05 Normal Menu Compressor Settin unit ACTUAL Default Min. Max. setting setting setting settings Unit Model for RCC-20 C5L2 C5L2 C5L2 C5L2 Not used this model Std. Std. r485 A3 settings dLEv...
- Page 38 Guardian Controls International dELY Starts per hour SH12 SH02 SH25 SH06 Stage up delay mins Su0.2 Su0.2 Su9.9 Su0.5 Stage down delay mins Sd0.2 Sd0.2 Sd9.9 Sd0.5 Capacity control delay mins dL0.2 dL0.0 dL5.0 DL0.2 After Stop delay mins dA1.0 dA0.1...
- Page 39 Guardian Controls International PP05 Norm al Menu Cond enser Settings Fan control selection Number of fans Fn01 Fn00 Fn05 Fn01 Trip input polarity tPoS tPoS tnEg tPoS FAnS Fan control setpoint F0.5 F0.5 F 0.0 F23.0 Control deadband db0.1 db0.1 db0.1...
- Page 40 Guardian Controls International PP11 Menu - Settings Level 2 Compressors Real time hours rh00 rh00 rh23 Real time minutes mins rt00 rt00 rt59 SCAL Pressure Transducer 1 4ma bar gauge L-01 L-01 Pressure Transducer 1 20ma bar gauge H 08...
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