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USER MANUAL SCROLL CHILLER

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1. e PCO of unit 2 IP 02 Adr Priv Shared ITrmi 26 Pr ITrm2 32 Sh Trm3 None Ok No l u 08 00 01 01 00 IN 12 0C OUT 12 50C OFF by Keyboard 10 2 2 Electrical Connection Type of Connection serial line Connection Cable two wires shield AWG22 24 sw Chiller Scroll 1 01 73 Scroll Manual 1 14 Connector pCO J11 Rx Tx Rx Tx GND pCO XS J6 Rx Tx Rx Tx GND PGD Address 25 PGD Address 28 pCO1 Address 1 pCO1 Address 4 10 2 3 Configuration of LAN Application e Enable the LAN function select yes for the parameter shown in the following mask of the User menu LAN and Supervision J3 in all units NB this parameter can be changed only when the chiller is OFF t_user_lan_3 LAN LOGIC J3 Enable no e Configure the LAN function User menu LAN and Supervision J3 in the Master unit unit with address 1 by setting o Control Logic t_user_lan_3 LAN LOGIC J3 Enable no Switch ON Logic o Rotation time LAN LOGIC J4 LAN Units rotation gt standard IRotat time 0000 h sw Chiller Scroll 1 01 74 Scroll Manual 1 14 o Management of non simultaneous compressor start ups t_user_lan_5 L oO Pp w ke where the Delay represents the time that elapses between compressor starts enabled by the Master unit in r
2. OFF by keyboard Switch On unit gt cooling RG Confirm SC Cancel e ifthe chiller is a Heat Pump model you can move the cursor to the operating mode by pressing and using the arrows select between cooling and heating e Press PFG to confirm unit ON in the selected mode or ESC to cancel the operation Once you have made the selection the display will return to the main screen sw Chiller Scroll 1 01 34 Scroll Manual 1 14 4 3 SWITCHING OFF OF THE UNIT The steps necessary for switching off the unit are the following e press SC to go to the main screen UL 08 00 01 01 00 IN 12 090 OUT 12 5 C e keep the key pressed down for at least 3 seconds The following screen will appear off_unit Switch Off unit RG Confirm SC Cancel Press Prg to confirm unit OFF or ESC to cancel the operation Once you have made the selection the display will return to the main screen 4 4 GENERAL DESCRIPTION OF MENUS The ESC key can be used as needed to exit submenus and also permits the user to view the main information concerning chiller operation From the main screen UL 08 00 01 01 00 IN 12 0C OUT 12 50C press Prg to view the menu using the arrow keys select the submenu concerned and press to enter it Below is a list of the items included in the main menu and the type of parameters contained in each Chiller Status This menu provid
3. ipo Indirizzo Descrizione richiesta invio messaggio con parametri via GSM 4 YOU Can send a message to switch on the unit via the supervisor in the heating mode and request a message to be sent reporting the unit s status PCO1 0000 D 002 000001 D 001 000001 A 001 000001 D 050 000001 8 E Descrizione selezione unita per recupero informazioni Tipo Indirizzo Descrizione richiesta invio messaggio stato unita selezionata 5 You can send a message to switch off the unit and receive a message reporting the unit s status PCO1 0000 D 001 000000 A 001 000001 D 050 0000018 Tipo Indirizzo Descrizione D 1 On Off da Supervisione Tipo Indirizzo Descrizione selezione unit per recupero informazioni Tipo Indirizzo Descrizione D 50 T tichiesta invio messaggio stato unit selezionata NB both ON OFF switching and the configuration of setpoints and differentials are operations that can be performed only on the unit in which the modem kit is installed In the case of LAN systems this will have to be the Master unit and therefore these settings will not be propagated to the other units as well However as it is the Master unit which controls the entire system the slave units will also be impacted by the new setting with the exception of On Off switching 9 4 5 Software configuration The configuration of the GSM protocol and of the modem are given in th
4. This logic provides for an increase in the control differential in low load situations often tied to a configuration without storage reservoir considered such when a single compressor is running and is switched off before a certain time threshold has elapsed Once active this reference threshold for maintaining the condition will be recomputed as follows threshold set by user e low load differential threshold standard differential The causes leading this logic to be deactivated are o the single compressor remains on beyond the control threshold threshold o more than one compressor is switched on The Low Load Logic can be configured with the following parameters o enable Low Load logic o select mode you can choose whether to use this low load logic in one or more chiller operating modes o control threshold o differentials with Low Load Logic enabled EX operation in Cooling Mode only Differential 4 Low Load Differential 6 on on off Tin off Tin Set Set 4 Set Set 6 EX Heat Pump operation Differential 4 Low Load Differential 6 sw Chiller Scroll 1 01 76 Scroll Manual 1 14 on on off Tin off Tin Set 4 Set Set 6 Set 11 2 HIGH PRESSURE PREVENTION FUNCTION This function which can be selected in the Manufacturer s menu Alarms gt Ue serves to prevent the circuits from being shut down due to the tripping of a high pressure alarm The parameters a
5. Present with pCO1 controller Active while unit is on Effect stops the compressors of circuit 2 Configuration Manufacturer s menu gt Alarms Uj Enable yes no Delay 0 999s Reset automatic manual Setpoint C Differential C Alarm Status differential setp Tout Evap 1 sw Chiller Scroll 1 01 30 Scroll Manual 1 14 3 1 9 Pump Thermal Alarm Thermal Alarm Pump 1 Input DIN7 pCO1 Present with pCO1 controller Active while unit is on Effect stops pump 1 if only one pump is installed or a second pump is in an alarm status it stops the compressors Thermal Alarm Pump 2 Input DIN8 pCO1 Present with pCO1 controller Active while unit is on Effect stops pump 2 if the first pump is also in an alarm status it stops the compressors Configuration Manufacturer s menu Alarms U6 Enable yes no Delay 0 999s Reset automatic manual 3 1 10 Water Flow Alarm Input DIN2 pCOXS DINY pCO 1 Present always Active while unit is on Effect stops all the compressors the pump will shut down after a set delay time Configuration Manufacturer s menu Alarms U7 Enable yes no Delay o atcompressor start up o while compressors are running Reset automatic manual 3 1 11 Alarm from Digital Input Input DING pCOXS DIN14 pCO 1 Present configuration DING or DIN14 based on the controller installed as alarm signalled
6. AQUIS a a EAE f a EE E E A ata 42 6 5 2 FlISIO ccoo A da A a a a L at ta 42 6 6 MANUFACTURER S MENU cistitis d tag Siena 43 6 6 1 Initialisation and password ann CEREA ARA E FUARAN IRKLAR E EER EAA KERA EELER 43 67 INFO MENU ia tire a tad ta L A a aaa an a na tai 43 7 APPLICATION SETTING PARAMETERS i AM ereenn ereenn 44 fat SETPOINIEMENU i ana tati 44 12 SER MENU iii ne rt da aj aa 44 7 2 1 User Setpoints and Parameters eee eee 44 7 2 2 User LAN and Supervision eee eee eee 45 7 2 3 User Alaris TTT 45 E Use CO o O 45 13 MAINTENANCE MENU ooo A A a aaa Eaa 45 7 3 1 Maintenance Manual Control eee ee eee 45 7 3 2 Maintenance Running eT 45 7 3 3 Maintenance Parameters ssemma n nn nmnn nat 46 7 4 MANUFACTURER S MENU TTT 46 7 4 1 Manufacturer Unit Config sss sese eee eee eee ee eee 46 7 4 2 Manufacturer Parameters iii 47 7 4 3 Manufacturer Alarms ii A A A 48 7 4 4 Manufacturer Carel EVD sss eee eee 49 8 CONTROL SYSTEM ARCHITECTURE Li sees essere ennenen ennenen ennenen nenen 51 8 1 MICROPROCESSOR LAYOUT HT 51 8 1 1 PEO Mit aaa 51 8 L 2 PGOXS si a i 52 8 1 3 Analog Input Configuration sese 52 8 2 DESCRIPTION OF INPUTS OUTPUT S A rn nr 53 8 2 1 O i ia sa A a ett ee Un ee eae 53 8 2 2 7 PRO Si E tea 58 8 3 INPUT OUTPUT OVERRIDE LEAH nc nnn cnn 60 97 SUPERVISION TET 61 94 MAIN PARAMETERS ostias la bb dahal a steven 61 9 2 CONNECTION WITH CAREL MODBUS PROTOCOL sese 6
7. SERIOUS Alarms NON SERIOUS Alarms ALL Alarms Whereas in the latter case the output will be activated upon the occurrence of any alarm whatsoever including those serving solely as warnings the other two options are configurable Based on the level Serious or Non Serious that the user assigns to individual alarms the output will signal the occurrence of any of them Shown below is one of the configuration screens User Alarms K2 K3 in which each alarm is represented by its corresponding code see Table of Alarm Codes and Descriptions t user all 02 ALARMS K2 CONFIGURATION S Serious N Not serious JAO1 A10 NNNNN NNNNN A11 A20 NN NNNNN e NNNNN NNNNN A14 Low Press Alarm A31 A40 NNNNN NNNNN Circuit 2 A41 A50 NNNNN NNNNN Based on this division it can also be decided which alarms the ones defined as serious will disengage the unit from any active LAN logic see section on LAN and bring it back into a stand alone mode 3 2 ALARM HISTORY The system features a history function accessible from Maintenance menu History R1 which keeps track of the alarms occurring in the chiller If a clock card has been installed the time and date will be memorised along with the alarm code and position in the database history_alarms Alarm History Alarm index in list le Alarm Code Alarm Description Tine eS ee Dato A it S A maximum of 100 alarms can be memorised once this limit is re
8. Upper value 30 0 999 9 999 9 bars not present A l rem set corr 1 Configuration of sensor B2 not present outdoor temp sensor S7 NTC sensor 0 1V NTC sensor 0 5V 2 B2 sensor type Sehsor sensor 0 20mA sensor 4 20mA sensor Remote Remote Setp s8 1 Configuration of sensor B3 Setpoint Adjustment Adjustment Outdoor Temp s9 1 Outdoor temperature sensor installed no no yes Sa 1 Heating element installed no no yes i without w o Slew Rate Sb 1 Configuration of analog outputs Y1 Y2 Slew Rate w Slew Rate sw Chiller Scroll 1 01 46 Scroll Manual 1 14 lt FCS or CONVO 2 Configuration of analog outputs Y3 Y4 MCHRTF 10A0 MCHRTF S 1 Config of Y1 Y2 Duty Cycle 1 0 0 5 10 0 Vis 2__ Config of Y1 Y2 Period 1 0 0 5 10 0 V s 1 Config of Y1 Y2 minimum voltage 0 0 0 9 9 V Sd 2 Config of Y1 Y2 maximum voltage 1 10 0 Sd 1 Sd 3 V 3 Config of Y1 Y2 maximum voltage 2 10 0 Sd 2 10 0 V 1 Minimum Config Triac Y3 Y4 35 0 0 0 100 0 Se 2 Maximum Config Triac Y3 Y4 93 0 0 0 100 0 3 Config WD Triac Y3 Y4 2 0 0 0 10 0 ms Sf 1 pCOE expansion installed no no yes Sg 1 Driver EVD400 0 0 2 2 EVD400 Driver Type tLAN pLAN tLAN Sh 1 EVD400 Sen
9. 2 5 3 Minimum OFF time of a compressor Manufacturer s menu Parameters 7 T1 It establishes the minimum time in seconds for which the compressors must remain off The compressors will not be started up again until the set minimum time has elapsed since they were last switched off _ __ _ ______ _ A lt 2 N OFF T 9 demand ene ts er TE O EP C ON Compr ta l Yo eee iksi OFF 1 Figure 4 Minimum compressor OFF time sw Chiller Scroll 1 01 14 Scroll Manual 1 14 2 5 4 Delay time between two start ups of different compressors Manufacturer s menu Parameters T2 It establishes the minimum time that must elapse between two compressor start ups irrespective of the water temperature read and the setpoint ON Compr 1 T ON Compr 2 ON OFF Figure 5 Delay time between two start ups 2 5 5 Delay time between two consecutive start ups of the same compressor Manufacturer s menu Parameters T2 It establishes the minimum time that must elapse between two start ups of the same compressor irrespective of the water temperature read and the setpoint This parameter makes it possible to limit the number of switching operations per hour If for example the maximum allowed number of compressor starts per hour is equal to 10 it will suffice to set a value of 360 seconds to assure compliance with this limit i s8 N ON z oTAL 9 demand J A OFF ON Compr pf a OFF l
10. 20 mA Condensation Pressure Condensation Pressure J2 2 B2 g 0 5V circ 2 circ 2 J2 3 B3 4 20 mA Remote Setpoint Remote Setpoint Remote Setpoint Remote Setpoint adjustment adjustment adjustment adjustment Evaporator inlet water Evaporator inlet water Evaporator inlet water Evaporator inlet water J3 3 B4 NTC temperature temperature temperature temperature Evaporator outlet water Evaporator outlet water Evaporator 1 outlet water Evaporator 1 outlet water J3 1 B5 NTC temperature temperature temperature temperature J3 3 B6 NTC A 4 Evap 2 outlet water temp Evap 2 outlet water temp On Off General fan alarm 2 General fan alarm 2 J6 1 B7 NTC Outdoor air temperature Outdoor air temperature Outdoor air temperature Outdoor air temperature J6 3 B8 NTC Analog output J4 3 VI 0 10V Condensation fan control Condensation fan control eae comio Eina OST J4 4 y2 0 10 V e T B fan control ias fan control J4 5 Y3 PWM Condensation fan control Condensation fan control ea tap cantro iaa fan contro J4 6 VA PWM e 7 Sees fan control bii fan control Digital input High pressure alarm High pressure alarm High pressure alarm High pressure alarm J5 1 ID1 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor circ 1 sensor circ 1 High pressure alarm High pressure alarm J5 2 ID2 24 Vac Vdc triggered by pressure triggered by pressure sensor circ
11. DRV 2 SuperHeat A R 101 101 DRV 1 Superheating time A R 102 102 DRV 2 Superheating time A R 103 103 DRV 1 Evaporation press A R 104 104 DRV 2 Evaporation press A R 105 105 DRV 1 Saturat evap temp A R 106 106 DRV 2 Saturat evap temp A R 107 107 DRV 1 Cond temp A R 108 108 DRV 2 Cond temp A R 109 109 Integer Variables CAREL MODBUS VARIABLE TYPE R W ADDRESS ADDRESS Unit Status R 1 129 Running hours Compressor 1 H R 2 130 Running hours Compressor 1 L R 3 131 Running hours Compressor 2 H R 4 132 Running hours Compressor 2 L R 5 133 Running hours Compressor 3 H R 6 134 Running hours Compressor 3 L R 7 135 Running hours Compressor 4 H R 8 136 Running hours Compressor 4 L R 9 137 Running hours Compressor 5 H R 10 138 Running hours Compressor 5 L R 11 139 Running hours Compressor 6 H R 12 140 Running hours Compressor 6 L R 13 141 Running hours Compressor 7 H R 14 142 Running hours Compressor 7 L R 15 143 Running hours Compressor 8 H R 16 144 Running hours Compressor 8 L R 17 145 Running hours Pump 1 H R 18 146 Running hours Pump 1 L R 19 147 Running hours Pump 2 H R 20 148 Running hours Pump 2 L R 21 149 Analog Output Y1 l R 22 150 Analog Output Y2 l R 23 151 Analog Output Y3 l R 24 152 Analog Output Y4 l R 25 153 DRV 1 Cooling Heating or Defrost mode R 100 228 DRV 2 Cooling Heating or Defrost mode R 101 229 DRV 1 Valve position R 10
12. J8 4 ID14 24 Vac Vde Serious alarm secondary Serious alarm secondary Serious alarm Serious alarm setpoint setpoint secondary setpoint secondary setpoint Digital output J12 2 NO1 NO relay Compr ON OFF 1 Compr ON OFF 1 Compr 1 ON OFF Circ 1 Compr 1 ON OFF Circ 1 J12 3 NO2 NO relay Compr ON OFF 2 Compr 2 ON OFF Circ 2 Compr 2 ON OFF Circ 1 J12 4 NO3 NO relay Compr 3 ON OFF Circ 2 J13 2 NO4 NO relay Compr 4 ON OFF Circ 2 J13 3 NO5 NO relay Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF J13 4 NO6 NO relay Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF Antifreeze heating Antifreeze heating Antifreeze heating Antifreeze heating Jite NO7 NO relay element ON OFF element ON OFF element ON OFF element ON OFF J15 1 NO8 NO relay General alarm General alarm General alarm General alarm J16 2 NO9 NO relay Fans ON OFF Fans ON OFF Fans ON OFF Fans ON OFF z Opening of 3 way valve Opening of 3 way valve Opening of 3 way valve Opening of 3 way valve J16 3 NO10 NO relay FC FC FC FC l Closing of 3 wav valve Closing of 3 way valve Closing of 3 way valve Closing of 3 way valve J16 4 NO11 NO relay FC FC FC FC y Coil capacitv control Coil capacitv control Coil capacitv control Coil capacitv control a t J17 1 NO12 NO relay l A solenoid valve circ 1 and solenoid valve circ 1 and solenoid valve On Off solenoid valve On Off 2 On Off 2 On Off J18 1 NO13
13. Password protected password not provided this menu is divided into e Manual Control enabling of manual override of the microcontroller inputs and outputs managed thereafter from the I O menu e Parameters sensor offset and password change e Running hours run time of the main chiller devices and management of the related alarms e History list of past alarms and erasure of history Manufacturer s Menu Password protected password not provided this menu is divided into e Unit Configuration parameters that define the type of unit and the devices making it up e Parameters setting of essential operating parameters condensation control defrost function e Alarms configuration of alarms e Carel EXV Drivers settings of drivers for the control of electronic valves e initialisation and password restoring of default parameters and password definition Info Menu It contains the version code and date of the software used from here you can also set the display language Password As indicated above the User Maintenance and Manufacturer s menus require entry of a password in order to gain access it was decided to give only the User password in this manual Entry of the password enables access at the level concerned for a certain amount of time so that it will not be necessary to re enter the password until this time elapses the password also provides access to lower level menus according to priority as shown below 1 Manufacturer s Men
14. 0 1 V 0 5 V 0 20 mA 4 20 mA ON OFF and NTC passive analog inputs NTC passive analog inputs Yellow power ON LED and 3 indicator LEDs analog outputs 0 10 V and PWM current outputs 24 Vac Vdc digital inputs 230 Vac or 24 Vac Vdc digital inputs connector with Vref for 5V power supplv to sensors and V Term for power supply to displav terminal connector for all standard display terminals in pCO controller series and for downloading application program pLAN local network connector connector for connection to the programming key digital outputs to relay flap for selecting the type of analog inputs flap for installing serial card optional flap for installing clock card optional sw Chiller Scroll 1 01 a Is als 2282 a G 2 A Li i e s pueg euas L a 88 c a S S 33 2 33 26 ji 393 51 uoyoajes Sojeuy Figure 15 Layout koy Burwwesbosrd o J12 J13 J14 J15 J16 J17 14 J18 Scroll Manual 1 14 8 1 2 pCOXS 1 Connector for 24Vac or 20 60 Vdc power supply IG GO 2 Input 24 Vac for phase controller and NTC analog inputs 0 1 V 0 5 V 0 20 mA 4 20 mA 5Vref for power supply to 5V ratiometric sensors and 24VDC for power supply to active sensors 3 Analog outputs 0 10 V and PWM phase control output 4 Voltage free contact digital inputs 5 Connector for all stand
15. 8 D R 38 38 Circuit 1 running D R 39 39 Circuit 1 running D R 40 40 Pump 1 D R 41 41 Pump 2 D R 42 42 Fans Series 1 D R 43 43 Fans Series 2 D R 44 44 Heating element D R 45 45 4 way valve Circ 1 D R 46 46 4 way valve Circ 2 D R 47 47 FC valve opening D R 48 48 FC valve closing D R 49 49 Configurable Alarm indication D R 50 50 Defrost Circ 1 D R 56 56 Defrost Circ 2 D R 57 57 Summer Winter Mode D R 58 58 Chiller On D R 59 59 High Pressure Prevention Circ 1 D R 60 60 High Pressure Prevention Circ 1 D R 61 61 General alarm D R 62 62 Freecooling Status D R 63 63 Freecooling Valve Status D R 64 64 Freecooling Valve Override D R 65 65 Alarm from Digital Input D R 71 71 Thermal Alarm Pump 1 D R 72 72 Thermal Alarm Pump 2 D R 73 73 Evaporator Water Flow Alarm D R 74 74 Inlet Temp Sensor Alarm D R 75 75 Outlet Water Temp Sensor Alarm Evaporator 1 D R 76 76 Outlet Water Temp Sensor Alarm Evaporator 2 D R 77 77 Press Sensor Alarm Circuit 1 D R 78 78 Press Sensor Alarm Circuit 2 D R 79 79 sw Chiller Scroll 1 01 67 Scroll Manual 1 14 Freecooling Temp Sensor Alarm D R 80 80 Setpoint Adjustment Sensor Alarm D R 81 81 Outdoor Temp Sensor Alarm D R 82 82 Low Pressure Alarm Circuit 1 D R 83 83 Low Pressure Alarm
16. 9 9 5 Offset sensor B5 pCO1 0 0 9 9 9 9 6__ Offset sensor B6 pCO1 0 0 9 9 9 9 7__ Offset sensor B7 pCO1 0 0 9 9 9 9 8 Offset sensor B8 pCO1 0 0 9 9 9 9 1 Offset sensor S1 EVD Circuit 1 0 0 9 9 9 9 N3 2 Offset sensor S2 EVD Circuit 1 0 0 9 9 9 9 3 Offset sensor S3 EVD Circuit 1 0 0 9 9 9 9 1 Offset sensor S1 EVD Circuit 2 0 0 9 9 9 9 N4 2 Offset sensor S2 EVD Circuit 2 0 0 9 9 9 9 3 Offset sensor S3 EVD Circuit 2 0 0 9 9 9 9 N5 1 Maintenance Password XXXX 0 9999 2 Duration of Login w Password 5 0 480 7 4 MANUFACTURER S MENU 7 4 1 Manufacturer Unit Config Screen Par Description Default Range UOM Manufacturer i l water water 1 Unit Tvpe water air Sarap i cooling only heat 2 Configuration cooling only pump s1 R22 R134a R404A R407C R410A R507 3 Gas RAONS R290 R600 R600a R717 R744 1 Number of circuits 1 1 2 s2 2 Compressors Circuit 1 1 1 2 3 4 3 Compressors Circuit 2 1 1 2 3 4 4 Pumps 0 0 1 2 S 1 Evaporator single single separate S4 1 Condenser single single separate S4a 1 Pressure sensor installed yes no yes 1 Type of Condensation Evaporation Control modulating no on off modulating S5 2 Fan series 1 1 2 3 Fan series 1 control output pwm 0 10V pwm 4 Fan series 2 control output pwm 0 10V pwm 1 Pressure sensor configuration irangaucer irang TOMA S6 4 20mA ratiometric 2 Lower value 0 0 999 9 999 9 bars 2
17. A Cooling Only W A Conn Name Analog input Description 1 Circuit 1 Circuit 2 Circuits 2 Circuits 1 Compressor 2 Compressors 2 Compressors 4 Compressors 4 20 mA A Condensation Pressure Condensation Pressure J2 1 B1 0 5V Condensation Pressure Condensation Pressure circ 1 circ J2 2 B2 4 20mA _ R Condensation Pressure Condensation Pressure 0 5V circ 2 circ 2 Remote Setpoint Remote Setpoint Remote Setpoint Remote Setpoint Jas GR mA adjustment adjustment adjustment adjustment Evaporator inlet water Evaporator inlet water Evaporator inlet water Evaporator inlet water J3 3 B4 NTC temperature temperature temperature temperature Evaporator outlet water Evaporator outlet water Evaporator 1 outlet water Evaporator 1 outlet water J3 1 B5 NTC temperature temperature temperature temperature l Ls A Evaporator 2 outlet water Evaporator 2 outlet water ski BO NTC temperature temperature J6 1 B7 NTC Outdoor air temperature Outdoor air temperature Outdoor air temperature Outdoor air temperature J6 3 B8 NTC Analog output J4 3 Y1 0 10V Condensation fan control Condensation fan control A arca e conte J4 4 y2 0 10 V fi el fan control Pane fan control J4 5 Y3 PWM Condensation fan control Condensation fan control ala fancontr l ES SEO J4 6 y4 PWM z l fan control eee fan control Digit
18. Changeover Changeover Changeover Changeover J8 4 ID14 24 Vac Vde Serious alarm secondary Serious alarm secondary Serious alarm l Serious alarm setpoint setpoint secondary setpoint secondary setpoint Digital output J12 2 NO1 NO relay Compr ON OFF 1 Compr ON OFF 1 Compr 1 ON OFF Circ 1 Compr 1 ON OFF Circ 1 J12 3 NO2 NO relay Compr ON OFF 2 Compr 2 ON OFF Circ 2 Compr 2 ON OFF Circ 1 J12 4 NO3 NO relay Compr 3 ON OFF Circ 2 J13 2 NO4 NO relay Compr 4 ON OFF Circ 2 J13 3 NO5 NO relay Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF J13 4 NO6 NO relay Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF 2 Antifreeze heating Antifreeze heating Antifreeze heating Antifreeze heating SIS NOZ NO relay element ON OFF element ON OFF element ON OFF element ON OFF J15 1 NO8 NO relay General alarm General alarm General alarm General alarm J16 2 NO9 NO relay Fans ON OFF Fans ON OFF Fans ON OFF 1 Fans ON OFF 1 J16 3 NO10 NO relay Cycle Reversing Valve Cycle Reversing Valve E Reversing valve G aia Vales J16 4 NO11 NO relay m Cycle Reversing Valve Cycle Reversing Valve circ 2 circ 2 J17 1 NO12 NO relay Fans ON OFF 2 Fans ON OFF 2 J18 1 NO13 NO relay Unit ON OFF Unit ON OFF Unit ON OFF Unit ON OFF Heat Pump W W Heat Pump W W Conn Name Analog input Description 1 Circuit 1 Circuit 2 Circuits 2 Circuits 1 C
19. Circuit 2 D R 84 84 High Pressure Alarm Circuit 1 D R 85 85 High Pressure Alarm Circuit 2 D R 86 86 Low Press Alarm from Sensor Circuit 1 D R 87 87 Low Press Alarm from Sensor Circuit 2 D R 88 88 High Press Alarm from Sensor Circuit 1 D R 89 89 High Press Alarm from Sensor Circuit 2 D R 90 90 Compressor Thermal Alarm Circuit1 D R 91 91 Compressor Thermal Alarm Circuit2 D R 92 92 Fan Thermal Alarm Series 1 D R 93 93 Fan Thermal Alarm Series 2 D R 94 94 Maintenance Threshold Exceeded Pump 1 D R 95 95 Maintenance Threshold Exceeded Pump 2 D R 96 96 Phase Direction Alarm D R 97 97 Antifreeze Alarm Evaporator 1 D R 98 98 Antifreeze Alarm Evaporator 2 D R 99 99 Maintenance Threshold Exceeded Compr 1 D R 100 100 Maintenance Threshold Exceeded Compr 2 D R 101 101 Maintenance Threshold Exceeded Compr 3 D R 102 102 Maintenance Threshold Exceeded Compr 4 D R 103 103 Maintenance Threshold Exceeded Compr 5 D R 104 104 Maintenance Threshold Exceeded Compr 6 D R 105 105 Maintenance Threshold Exceeded Compr 7 D R 106 106 Maintenance Threshold Exceeded Compr 8 D R 107 107 Clock Malfunction D R 108 108 Freecooling Fault D R 109 109 DRV 1 Automatic Manual mode D R 110 110 DRV 2 Automatic Manual mode D R 111 111 DRV 1 Low SH D R 112 112 DRV 2 Low SH D R 113 113 DRV 1 HtCond D R 114 114 DRV 2 HtCond D R 115 115 DRV 1 LOP D R 116 116 DRV 2 LOP D R 117 117 DRV 1 MOP D R 118 118 DRV 2 MOP D R 119 119 Outl
20. NOrelay Unit ON OFF Unit ON OFF Unit ON OFF Unit ON OFF 8 2 2 pCOXS e Cooling Only Cooling Only pcoXS Water Air Water Water ConnaliName Signal 1 Circuit 1 Circuit 1 Circuit 1 Circuit 1 Compressor 2 Compressors 1 Compressor 2 Compressors Analog input J2 2 Rr f Oey Condensation Pressure Condensation Pressure Condensation Gorigensation NTC Temperature Temperature Remote setpoint Remote setpoint Remote setpoint Remote setpoint J2 3 B2 adjustment outdoor adjustment outdoor adjustment outdoor adjustment outdoor temp sensor temp sensor temp sensor temp sensor sw Chiller Scroll 1 01 58 Scroll Manual 1 14 J2 4 B3 NTC Evaporator inlet water Evaporator inlet water Evaporator inlet water Evaporator inlet water temperature temperature temperature temperature J2 5 B4 NTC Evaporator outlet water Evaporator outlet water Evaporator outlet water Evaporator outlet water temperature temperature temperature temperature Analog Output J3 1 Y1 0 10 V Fan control Fan control J3 2 Y2 0 10 V J3 3 Y3 PWM Fan control Fan control Digital Input J4 4 ID1 No voltage f Fa Se 7 contact No voltage P J4 2 ID2 contact Water flow switch alarm Water flow switch alarm Water flow switch alarm Water flow switch alarm No voltage High pressure al
21. l 19 2 8 ELEGTRICALHEATING ELEMENT S TTT 20 29 DEFROSTIFUNGTION ccoo aiii 21 2 9 1 Start Defrost LOGIC vecinita 21 2 9 2 Main Phase suroan iena biet cape p l at o ar 22 293 s Override phaASES i silk sp b b a aa nies 22 2 9 4 Defrost Management ccoo 24 2 9 5 Mantial Defrost Override avs iii ini tai 24 2 10 FREEGOOLIN G ii Taf a a A ra f 24 2 1051 Activation of Free oolinej ssir i A deta eat 25 2 10 2 Fan speed in Freecooling bale 25 2 10 3 Combined operation mechanical cooling freecooling sss na 26 2 10 4 Condensation coil Capacity control see eee eee eee eee eee 26 2 10 5 Capacity reducing override function eee eee eee eee eee 26 2 10 67 iFreecoocliri WIND ss ss i Sees TTT 27 2 10 7 3 way valve maintenance function 00 eee eee sese essere ereenn 27 e SALARMS i E E E E E O T 28 3 1 ALCARMMANAGEMEN H 28 3 1 1 Phase Directi n Alar i iii i A N TA SA N SIT 28 cod ey samme o 28 3 1 3 High Pressure Alarm from Digital Input nn nnnr ran arr nanna 28 3 1 4 Low Pressure Alarm from Digital Input eee eee eee eee 29 3 1 5 High Pressure Alarm triggered by Sensor sese eee eee 29 3 1 6 Compressor Thermal Alarm sees eee eee eee eee eee eee eee 29 3 1 7 Fan Therma Alan ia ia e A as are ahi Saab A A es oe 30 8 1 8 A A a LA a 30 3 1 9 Pump Thermal Alan i TTT TTT 31 UN 31 Sell Alarm from Digital He enla haa niyias Adie iste ae 31 3 1 12 Maintenance Alarms iii cid a EEEN 31 31 13 Clock Gard A
22. manual in section 7 Software version installed Code of the installed software Date of the installed software Language selection Parameter resulting from the combination of the main parameters set in the software application 43 Scroll Manual 1 14 7 APPLICATION SETTING PARAMETERS 7 1 SETPOINT MENU Screen Par Description Default Range UOM Setpoint F2 1 Cooling Setpoint 12 0 H7 1 H7 2 C 2 Heating Setpoint 40 0 H8 1 H8 2 F3 1 Secondary Cooling Setpoint 12 0 H7 1 H7 2 2 Secondary Heating Setpoint 40 0 H8 1 H8 2 F4 1 Setpoint Inside Time zone 12 0 H7 1 H7 2 C 2 Setpoint Outside Time zone 12 0 H7 1 H7 2 F5 1 Setpoint Inside Time zone Cooling 12 0 H7 1 H7 2 2 Setpoint Outside Time zone Cooling 12 0 H7 1 H7 2 F6 1 Setpoint Inside Time zone Heating 40 0 H8 1 H8 2 2 Setpoint Outside Time zone Heating 40 0 H8 1 H8 2 1 Start of time zone hour Monday 7 0 23 h 2 Start of time zone minutes Monday 00 0 59 min F7 3 End of time zone hour Monday 22 0 23 h 4 End of time zone minutes Monday 00 0 59 min the same applies for the other days 1 Enabling of setpoint adjustment via analog input 0 0 1 F9 2 l Adjustment with min value of analog input 5 0 99
23. mounted Remote display Wall mounted max 200m pCO microprocessor Cable 6 wires w RJ11 connectors A N T NOTE l The cable is different from a standard telephone cable because the connectors are reversed o 2 T connectors TCONNG6 with jumpers J14 and J15 in position 1 2 o 3 telephone cables for the connections between pCO1 T connector T connector Local Display T connector Remote Displav o Shielded 3 twisted pair cable to connect the two T connectors 4 5 2 Software configuration In order for the local display terminal and where present the remote display terminal to work correctly the addresses must be set as shown in the table List of Addresses pCO address Display Address Unit 1 25 Remote Display 32 For the configuration procedure see section 10 2 5 ADDRESS SETTINGS 5 1 SETTING THE DISPLAY ADDRESS To set the address of the display terminal carry out the following steps e Press the Up Enter and Down keys together until the following screen appears sw Chiller Scroll 1 01 37 Scroll Manual 1 14 IDisplav address Isetting 00 e Press UP or DOWN to set the address e Press ENTER to save and exit the procedure 5 2 SETTING THE PCO ADDRESS PCOXS OR PCO7 To set the address of the pCO controller carry out the following steps To the pCO1 connect a display terminal with an address configured as 0 e Switch on the pCO
24. proportional control function based on the currently active setpoint Setpoint menu and differential User menu Setpoints and parameters H9 will define a proportional band Within this band the positions of the device control steps will be computed based on the number of compressors 2 1 3 PROPORTIONAL INTEGRAL Control The proportional integral control system uses the same parameters as the simple proportional control computing the device switch on steps based on the setpoint differential and set integration time User menu Setpoints and parameters H3 2 2 SETPOINT Active Setpoint Setpoint menu F1 The first screen displayed in the SETPOINT menu indicates the setpoint value used in the chiller control logic This is the overall value resulting from automatic adjustments corrections and limitations Main setpoint Setpoint menu gt F2 From the SETPOINT menu you can establish the main setpoint for the summertime and wintertime operating modes t_setpoint_2 SETPOINT F2 SETTING ICool 00 0 C IHeat 00 0 C Secondary setpoint Setpoint menu F3 From the SETPOINT menu you can establish the secondary summertime and wintertime setpoints controlled by the digital input ID14 or ID6 with pCOXS When the digital input is open the main setpoint will be used under the control logic when the digital input is closed the secondary setpoint will be used sw Chiller Scroll 1 01 9 Scroll Manu
25. start of Freecooling 120 30 999 S Tn 1 Outlet water T limit in Freecooling mode 7 0 99 9 C 2 Differential for reactivation of Freecooling 1 0 0 0 5 0 To 1 Freecooling valve run time 180 0 500 S sw Chiller Scroll 1 01 47 Scroll Manual 1 14 2 Enable Freecooling valve rotation yes no yes 3 Freecooling valve rotation threshold 168 0 720 hours Tp 1 Freecooling valve override time 50 0 180 S 2 Adjust Freecooling valve counter 3600 0 4000 S T 1 Enable coil capacitv control solenoid valve ves no yes q l z 2 Capacity control solenoid valve logic n o n o n c Tr 1 HP prevention Capacity reduction inhibition setpoint 23 0 20 0 25 0 bars 2 HP prevention Capacity reduction inhibition differential 5 0 1 0 10 0 bars Ts 1 LP prevention Capacity reduction setpoint 11 0 5 0 20 0 bars 2 LP prevention Capacity reduction differential 5 0 1 0 10 0 bars Tt 1 Enable capacity control solenoid valve override yes no yes Tu 1 Compr OFF time with valve open due to override 120 0 999 min 2 Duration of valve override for compr OFF 10 0 999 min Tv 1 Compr ON time in FC mode with valve open due to override 60 0 999 min 2 Duration of valve overri
26. the stop defrost threshold has been exceeded or due to a timeout will stop and wait either to carry out any override phases together with the other circuit or resume heat pump operation 2 9 4 2 Separate defrosting With this logic each cooling circuit will go into a defrost cycle separately the first circuit to carry out a defrost cycle will prevent the other circuit from doing so until it switches back into the heat pump mode at this point the second circuit will be able to go into the defrost mode if the conditions thus require 2 9 5 Manual Defrost Override From the Maintenance menu Manual Control M2 it is possible to start a defrost cycle via the override function this override bypasses the minimum time set between two consecutive defrost cycles set from Manufacturer s menu gt Parameters Td and resets the time counter NB the override will follow either the Simultaneous or Separate logic as configured for normal operation and will be utilisable only on the active circuit 2 10 FREECOOLING The freecooling function a feature only of specific units makes it possible to economise on the costs of cooling water supplied to users thanks to an outdoor air cooled water heat exchanger its advantages include production of chilled water at no cost in wintertime lower operating costs during in between seasons lower maintenance costs and less wear on the compressors sw Chiller Scroll 1 01 24 Scroll Manu
27. via digital input User menu Setpoint and Parameters H1 H2 Active while unit is on Effect stops the unit the pump will shut down after a set delay time Configuration User menu Setpoints and parameters U1 H2 Enable yes no Delay 0 999s Reset automatic manual 3 1 12 Maintenance Alarms A time counter keeps track of the running hours of the devices installed in the chiller namely Pumps Maintenance menu Running hours Pd Pe Compressors Maintenance menu gt Running hours P3 P10 If the maintenance alarms are enabled Maintenance menu Running hours P1 Pb it will be necessary to configure operating thresholds above which the alarm concerned will be triggered This time counter can then be reset in order to deactivate the corresponding alarm Maintenance menu Running hours P3 P10 Pd Pe sw Chiller Scroll 1 01 31 Scroll Manual 1 14 3 1 13 Clock Card Alarm Manufacturer s menu Alarms U5 The alarm generated by the clock card inhibits unit On Off switching and setpoint adjustments based on time zones 3 1 14 Digital Alarm Output From the User menu Alarms K1 it is possible to configure the digital output dedicated to the signalling of alarms NO5 pCOXS NO8 pCO1 based on the use logic N O normally open N G normally closed and the type of alarms present Specifically it is possible to choose whether to be alerted of the occurrence of
28. 0 S 4 Freecooling fault alarm differential 0 2 0 0 2 0 C 1 Threshold value of Tin Tfc beyond which in the absence of freecooling a 1 0 0 0 3 0 c Un fault will be signalled SR 2 Threshold value of Tfc Tin below which if the freecooling function is on a 0 5 0 0 2 0 C fault will be signalled l i Uo 1 Minimum fan operating capacitv for enabling freecooling fault alarm 20 0 0 0 100 0 7 4 4 Manufacturer Carel EVD Screen Par Description Default Range UOM Manufacturer 1 Minimum steps Custom Valve 0 0 8100 vi 2 Maximum steps Custom Valve 0 0 8100 2 Closing steps Custom Valve 0 0 8100 v2 1 Extra Opening Custom Valve no no yes 2 Extra Closing Custom Valve no no yes 1 Mov current 0 0 1000 mA V3 2 Stat current 0 0 1000 mA 3 Frequency 32 32 501 Hz 4 Duty cycle 0 0 100 v4 1 EEV position with 0 capacity demanded 30 V5 il Minimum value of EVD sensor S1 1 0 9 9 99 9 barg 2 Maximum value of EVD sensor S1 9 3 0 0 99 9 barg 1 Low superheat alarm delay 120 0 3600 S 2 High superheat alarm delay 20 0 500 min V6 3 LOP alarm delay 120 0 3600 S 4 MOP alarm delay 0 0 3600 S 5 Sensor error alarm delay 10 0 999 S 1 Percentage of EEV opening Chiller Mode 0 0 100 v8 2__ Proportional constant Chiller Mode 0 0 0 0 99 9 3 Integration time Chiller Mode 0 0 999 S v9 1 Superheati setpoint Chiller Mode Driver 1 0 0 0 0 50 0 C 2__ Low superheat Chiller Mod
29. 1 9 3 CONNECTION WITH LONWORKS PROTOCOL nanna tran ann nn 62 914 GSM PROTOCOL vasa iii tet e a a a A da 62 9 4 1 Alarm Message eot aea nd a od da 62 9 4 2 Unit Status Lee Te L a 63 9 4 3 Main Parameters Message is isib ni ile ean eee eaten eae 63 9 4 4 Parameter Configuration Message eee eee eee 63 9 4 5 Software Configurar ian en oda Licentiate iia ate 65 9 4 6 Modem Gontigurationizi tak ia ea a A ee A da 66 9 4 7 Modem statuS intra dia dde 66 95 OTHER SUPERVISION PROTOGOL Sitio doi 66 9 6 LIST OF VARIABLES UNDER SUPERVISION sese eee eee 67 10 AN a 70 10 1 LAN LOGIC USER MENU gt LAN AND SUPERVISION sese eee eee eee 70 TOA So GontrolliOg iO ia A a a a a a ai 70 Example 70 10 12 Rotation Logie ia a A EE TAANA een ea eee 71 10 13 SLANSCYMAMMIGS ota i olor 72 sw Chiller Scroll 1 01 4 Scroll Manual 1 14 10 27 SYSTEM CONFIGURATION uniti cae ent a ie i i 72 10 21 Address SeTlINGS ei a r a a a io 73 10 2 2 Electrical Connection a renna e a liado didas 73 10 23 Configuration of LAN Application aeania i a a a a eaaa r ai Eia 74 10 24 CLEAN Status cnt tae darla 75 10 2 5 Switching on Units acres da 75 102 6 Shared Display Terminal iaa rs tas 76 11 ADVANCED OPTIONS i ii i i a a nd dentada 76 11 1 COW LOAD LOGIC ti ius ib ases 76 11 2 HIGH PRESSURE PREVENTION FUNCTION sese ee eee 77 11 3 ELECTRONIC VALVE i sbie sir e e Dade TSTS Ue abba a a a eta 77 11 3 1 EVD 400 th AN HH
30. 1 High pressure alarm High pressure alarm J5 2 ID2 24 Vac Vdc Kw triggered by pressure triggered by pressure sensor circ 2 sensor circ 2 Low pressure alarm Low pressure alarm High pressure alarm High pressure alarm J5 3 ID3 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor circ 1 sensor circ 1 High pressure alarm High pressure alarm J5 4 ID4 24 Vac Vdc triggered by pressure triggered by pressure sensor circ 2 sensor circ 2 J5 5 ID5 24 Vac Vde Compressor thermal Compressor thermal Compressor thermal Compressor thermal alarm alarm alarm circ 1 alarm circ 1 J5 6 ID6 24 Vac Vde B Compressor thermal Compressor thermal alarm circ 2 alarm circ 2 J5 7 ID7 24 Vac Vdc Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 J5 8 ID8 24 Vac Vdc Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 J7 1 ID9 124 Vac Vdc Water flow switch alarm Water flow switch alarm Water flow switch alarm Water flow switch alarm J7 2 ID10 24 Vac Vdc General fan alarm General fan alarm General fan alarm 1 General fan alarm 1 J7 3 ID11 24 Vac Vdc Phase direction alarm Phase direction alarm Phase direction alarm Phase direction alarm J7 4 ID12 24 Vac Vdc Remote On Off Remote On Off Remote On Off Remote On Off J8 2 ID13 24 Vac Vdc General fan alarm 2 General fan alarm 2
31. 1 controller simultaneously pressing the ALARM and UP keys on the terminal until the e following screen appears IpLan address o UP increase DOWN decrease ENTER save amp exit e Press UP or DOWN to set the address according to the table above e Press ENTER to save and exit the procedure 5 3 MICROPROCESSOR DISPLA Y CONFIGURATION Once the display and pCO addresses have been set values indicated in the tables providea if the display does not show anything it means that the pCO controller needs to be set so that it can communicate with the display terminal Follow the procedure indicated below Press UP ENTER DOWN together for 5 seconds the following screen will appear IDisplav address ESTA 2 25 Press ENTER to move to the field at the bottom and use the arrows to select the address of the pCO controller connected to the display Press ENTER to confirm the following screen will appear Terminal config Press ENTER to continue Press ENTER the following screen will appear Trm3 None Pr Private Sh Shared Display addresses Change from No to Yes to confirm changes From this screen you must set the address and operating mode of the display terminal connected to the microprocessor Note that up to 3 displays terminals Tmr1 2 3 can be connected to a pCO Press ENTER to move the cursor into the fields and UP and DOWN to change the value of the terminals concer
32. 1 selection of unit for information retrieval A 31 setpoint cooling x10 A 32 setpoint heating Cx10 A 33 setpoint differential cooling Cx10 A 34 setpoint differential heating Cx10 A 35 secondary setpoint cooling Cx10 A 36 secondary setpoint heating Cx10 sw Chiller Scroll 1 01 63 Scroll Manual 1 14 The configuration message must be formatted as follows lt header gt lt password gt lt type 1 gt lt address 1 gt lt value 1 gt lt type N gt lt address N gt lt value N gt amp where header type of microcontroller e g pCO1 password modem password modem configuration parameter set from User menu gt LAN and Supervision It must be composed of 4 characters I type type of the i variable to be set A if analog I if integer D if digital I address address of the i variable to be set It must be composed of 3 characters I value value to be assigned to the i variable It must be composed of 6 characters in the case of negative values the symbol must be used in place of the first character for digital variables the accepted values are 000000 or 000001 amp message closing character Important e the maximum number of parameters that can be set with a single message is 11 There must be no spaces present in the message the message must start off with a Each field must be separated by a The message must end with the charact
33. 2 230 DRV 2 Valve position R 103 231 DRV 1 Capacity required l R 104 232 DRV 2 Capacity required R 105 233 sw Chiller Scroll 1 01 69 Scroll Manual 1 14 10 LAN 10 1 LAN LOGIC USER MENU gt LAN AND SUPERVISION User menu gt LAN and Supervision J3 10 1 1 Control Logic Connecting a number of chillers in a LAN up to a maximum of 4 of the same type makes it possible to adopt a logic whereby thermal demands are distributed in a more efficient manner than when each chiller simply works on its own with its own temperature measurements and setpoints The two different control strategies of the control logic are e Step Control e Cascade Based on the number of units present in the LAN and the total number of compressors the Master unit computes the control steps within the temperature range defined by the programmed setpoint and differential Specifically in the Step Control mode the logic used will switch on the compressors based on the growing demand for resources as it interrogates the units from time to time in the Cascade mode on the other hand another chiller will be called into action only when running the compressors of all the units already active is not sufficient For greater clarity below we illustrate the control logics by means of an example Example 2 units connected 2 compressors per unit Total cooling steps 4 MASTER Setpoint unit 1 120 MASTER different
34. 2 sensor circ 2 Low pressure alarm Low pressure alarm High pressure alarm High pressure alarm J5 3 ID3 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor circ 1 sensor circ 1 High pressure alarm High pressure alarm J5 4 ID4 24 Vac Vdc triggered by pressure triggered by pressure sensor circ 2 sensor circ 2 J5 5 ID5 24 Vac Vde Compressor thermal Compressor thermal Compressor thermal Compressor thermal alarm alarm alarm circ 1 alarm circ 1 J5 6 ID6 24 Vac Vde Compressor thermal Compressor thermal alarm circ 2 alarm circ 2 J5 7 ID7 24 Vac Vdc Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 J5 8 ID8 24 Vac Vdc Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 sw Chiller Scroll 1 01 55 Scroll Manual 1 14 J7 ID9 24 Vac Vdc Water flow switch alarm Water flow switch alarm Water flow switch alarm Water flow switch alarm J7 2 ID10 24 Vac Vdc General fan alarm General fan alarm General fan alarm 1 General fan alarm 1 J7 3 ID11 24 Vac Vdc Phase direction alarm Phase direction alarm Phase direction alarm Phase direction alarm J7 4 ID12 24 Vac Vdc Remote On Off Remote On Off Remote On Off Remote On Off Summer Winter Summer Winter Summer Winter Summer Winter wee D13 ee aC Oe
35. 4 Vac Vde S alarm secondary Si alarm secondary Soi alarm secondary li alarm secondary Digital output J12 2 NO1 NO relay Compr ON OFF 1 Compr ON OFF 1 Compr 1 ON OFF Circ 1 Compr 1 ON OFF Circ 1 J12 3 NO2 NO relay Compr ON OFF 2 Compr 2 ON OFF Circ 2 Compr 2 ON OFF Circ 1 J12 4 NO3 NO relay Compr 3 ON OFF Circ 2 J13 2 NO4 NO relay Compr 4 ON OFF Circ 2 J13 3 NO5 NO relay Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF J13 4 NO6 NO relay Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF ii NG Nolsey A J15 1 NO8 NO relay General alarm General alarm General alarm General alarm J16 2 NO9 NO relay J16 3 NO10 NOrelay Cycle Reversing Valve Cycle Reversing Valve ee Reversing valve ae Reversing valve J16 4 NO11 NO relay L C D Reversing Valve ee Reversing Valve J17 1 NO12 NOrelay a J18 1 NO13 NOrelay Unit ON OFF Unit ON OFF Unit ON OFF Unit ON OFF e Freecooling Freecooling pCO1 Conn Name Description 1 Circuit 1 Circuit 2 Circuits 2 Circuits 1 Compressor 2 Compressors 2 Compressors 4 Compressors Analog input J2 1 B1 20 mA Condensation Pressure Condensation Pressure Pondensatida Pressure Condensation Pressure 0 5V circ 1 circ 1 4 20 mA Condensation Pressure Condensation Pressure J2 2 B2 0 5V circ 2 circ 2 i Remote Setpoint Remote Setpoint Remote Setpoint
36. 9 99 9 3 Adjustment with max value of analog input 5 0 99 9 99 9 C 1_ Compensation Setpoint Cooling 30 0 99 9 99 9 C Fa 2 Compensation Differential Cooling 3 0 10 0 10 0 C 2 Maximum Compensation Cooling 2 0 10 0 10 0 1 Compensation Setpoint Heating 0 99 9 99 9 C FD 2 Compensation Differential Heating 3 0 10 0 10 0 3 Maximum Compensation Heating 0 10 0 10 0 7 2 USER MENU 7 2 1 User Setpoints and Parameters Screen Par Description Default Range UOM User not present serious H1 1 DIN 14 Configuration not present mit a series 2 Reset serious alarm from Din auto auto man not present serious H2 1 DIN 6 Configuration not present alarm secondary setpoint 2 Reset serious alarm from Din auto auto man ti 1 Tvpe of control proportional es L 2__ Integral Time 600 0 9999 S 2 Percentage of Hysteresis 100 0 100 none by time H4 1 Automatic Setpoint Adjustment none zones via digital input H5 1 Setpoint compensation in cooling mode no no yes 2__ Setpoint compensation in heating mode no no yes H6 1 Enable dehumidification setpoint no no yes H7 1 Cooling setpoint lower limit 8 99 9 99 9 C 2 Cooling setpoint upper limit 16 99 9 99 9 C H8 1 Heating setpoint lower limit 30 99 9 99 9 C 2 Heating setpoint upper limit 50 99 9 99 9 C H9 1 Setpoint Differential in cooling mode 4 0 0 10 0 C 2 Setpoint Differential in heating mode 4 0 0 10 0 C 1 Pum
37. CO1 Present with pCO1 controller Active while circuit 1 is operating Effect stops the compressors of circuit 1 sw Chiller Scroll 1 01 29 Scroll Manual 1 14 Thermal Alarm Circuit 2 Input DING pCO1 Present with pCO1 controller Active while circuit 2 is operating Effect stops the compressors of circuit 2 Configuration Manufacturer s menu Alarms Uh Enable yes no Reset automatic manual Delay o at compressor start up o while the compressors are running 3 1 7 Fan Thermal Alarm Fan Thermal Alarm 1 Input DIN10 pCO1 Present with pCO1 controller Active when the fan digital output is active Effect stops the compressors of circuit 1 and circuit 2 if a single series of fans is present stops the fans Fan Thermal Alarm 2 Input DIN14 pCO1 Present with pCO1 controller and configuration DIN14 for the alarm concerned User menu Setpoints and Parameters gt H1 Active when the fan digital output is active Effect stops the compressors of circuit 2 stops the fans Configuration Manufacturer s menu Alarms Ui Enable Reset automatic manual Delay 0 999 s 3 1 8 Antifreeze Alarm Antifreeze Alarm Evaporator 1 Input B4 pcoXS B5 pco1 Present always Active while unit is on Effect stops the compressors of circuit 1 stops the compressors of circuit 2 only if a single evaporator is present Antifreeze Alarm Evaporator 2 Input B6 pco1
38. D13 24 Vac Vdc J8 4 ID14 24 Vac Vde Serious alarm secondary Serious alarm secondary Serious alarm secondary Serious alarm secondary setpoint setpoint setpoint setpoint Scroll Manual 1 14 Conn Name Analog input Digital output J12 2 NO1 NO relay Compr ON OFF 1 Compr ON OFF 1 Compr 1 ON OFF Circ 1 Compr 1 ON OFF Circ 1 J12 3 NO2 NO relay Compr ON OFF 2 Compr 2 ON OFF Circ 2 Compr 2 ON OFF Circ 1 J12 4 NO3 NO relay Compr 3 ON OFF Circ 2 J13 2 NO4 NO relay Compr 4 ON OFF Circ 2 J13 3 NO5 NO relay Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF J13 4 NO6 NO relay Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF is Nor S EE jer aceon f J15 1 NO8 NO relay General alarm General alarm General alarm General alarm J16 2 NO9 NO relay J16 3 NO10 NO relay J16 4 NO11 NO relay J17 1 NO12 NOrelay eo Ss J18 1 NO13 NO relay Unit ON OFF Unit ON OFF Unit ON OFF Unit ON OFF e Heat Pump W A Heat Pump W A Description 1 Circuit 1 Circuit 2 Circuits 2 Circuits 1 Compressor 2 Compressors 2 Compressors 4 Compressors J24 BI 4 20 mA Condensation Pressure Condensation Pressure Condensation Pressure Condensation Pressure 0 5V circ 1 circ 1 4
39. Drv2 N1 AL 063 LAN disconnected Drv1 NT AL 064 LAN disconnected Drv2 N1 AL 065 Autosetup Procedure not completed Drv1 N1 AL 066 Autosetup Procedure not completed Drv2 N1 AL 067 Outlet Water Temp Sensor Alarm Condenser 1 G AL 068 Outlet Water Temp Sensor Alarm Condenser 2 G sw Chiller Scroll 1 01 33 Scroll Manual 1 14 4 USER INTERFACE The user interface adopted PGD1 comprises an LCD display 8 rows x 22 columns and 6 keys From here the user can carry out all program related operations view the status of the unit at all times and edit parameters 4 1 DESCRIPTION OF KEYBOARD The 6 keys and their respective functions are described in the table below Key Description A ALARM Press the ALARM kev to reset alarms When there is an alarm it will light up iv Prg PROGRAM Press PRG to access the main menu Esc ESC Press ESC to move up to a higher level in the menu 4 UP Press UP to go to the next screen or increase the value of a parameter e ENTER Press ENTER to go into the fields of parameters to be edited and to confirm changes B DOWN Press DOWN to go to the previous screen or decrease the value of a parameter 4 2 SWITCHING ON THE UNIT AND SELECTING THE OPERATING MODE The steps necessary for switching on the unit and selecting the mode are the following e press ESC to go to the main screen ul 08 00 01 01 00 IN 12 0C OUT 12 5 C
40. N Capacity reduction w o verride p Setp iad Diff l In the case of a dual circuit the higher of the pressures is considered 2 10 6 Freecooling warning Manufacturer s menu Alarms Um Un The Freecooling warning function has been implemented to enable identification of a malfunctioning of the freecooling valve and is based on the reading of the temperature sensor and the freecooling logical status An alarm is signalled if anv of the following conditions occur 1 If FC ON a freecooling fault will be signalled if Tfc Tin lt FaultDeltaON If the freecooling mode is enabled and the absolute value of the difference between Tin and Tfc is very small the freecooling valve could be incorrectly blocked in the closed position and thus prevent the freecooling function from working 2 If FC OFF a freecooling fault will be signalled if Tin Tfc gt FaultDeltaOFF If the freecooling mode is disabled and the difference between Tin and Tfc is greater than FaultDeltaOFF the freecooling valve could be incorrectly blocked in the open position and cause an increase in the temperature Tin NB The freecooling warning will be disabled if the fan speed is lower than the minimum set for enabling the function itself Manufacturer s menu Alarms bo 2 10 7 3 way valve maintenance function The valve used to divert water into the freecooling coil is a sector type valve and in order to ensure that it performs effici
41. Phase direction alarm Phase direction alarm Phase direction alarm J7 4 ID12 24 Vac Vdc Remote On Off Remote On Off Remote On Off Remote On Off J8 2 ID13 24 Vac Vdc General fan alarm 2 General fan alarm 2 J8 4 ID14 24 Vac Vde Serious alarm secondary Serious alarm secondary Serious alarm secondary Serious alarm secondary setpoint setpoint setpoint setpoint Digital output J12 2 NO1 NO relay Compr ON OFF 1 Compr ON OFF 1 Compr 1 ON OFF Circ 1 Compr 1 ON OFF Circ 1 J12 3 NO2 NO relay Compr ON OFF 2 Compr 2 ON OFF Circ 2 Compr 2 ON OFF Circ 1 J12 4 NO3 NO relay Compr 3 ON OFF Circ 2 J13 2 NO4 NO relay Compr 4 ON OFF Circ 2 sw Chiller Scroll 1 01 53 Scroll Manual 1 14 J13 3 NO5 NO relay Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF Pump 1 ON OFF J13 4 NO6 NO relay Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF Pump 2 ON OFF sive nar E F EE J15 1 NO8 NO relay General alarm General alarm General alarm General alarm J16 2 NO9 NO relay Fans ON OFF Fans ON OFF Fans ON OFF 1 Fans ON OFF 1 J16 3 NO10 NOrelay J16 4 NO11 NO relay Es SS J17 1 NO12 NO relay Fans ON OFF 2 Fans ON OFF 2 J18 1 NO13 NOrelay Unit ON OFF Unit ON OFF Unit ON OFF Unit ON OFF e Cooling Only W W Cooling Only W W Description Conn Name 1 Circuit 1 Circuit 2 Circuits 2 Circuits 1 Compress
42. Remote Setpoint KE B3 ASEO adjustment adjustment adjustment adjustment Evaporator inlet water Evaporator inlet water Evaporator inlet water Evaporator inlet water J3 3 B4 NTC temperature temperature temperature temperature J3 1 B5 NTC Evaporator outlet water Evaporator outlet water Evaporator 1 outlet water Evaporator 1 outlet water temperature temperature temperature temperature J3 3 B6 NTC i S Evaporator 2 outlet water Evaporator 2 outlet water temperature temperature J6 1 B7 NTC Outdoor air temperature Outdoor air temperature Outdoor air temperature Outdoor air temperature J6 3 B8 NTC Freecooling Temperature Freecooling Temperature Freecooling Temperature Freecooling Temperature Analog output J4 3 Y1 0 10V Condensation fan control Condensation fan control ne rencontre Gnani ai J4 4 y2 0 10 V e Raas fan control eee fan control sw Chiller Scroll 1 01 57 Scroll Manual 1 14 J4 5 Y3 PWM Condensation fan control Condensation fan control eee ale bi tra aa tan conitrol J4 6 y4 PWM s S Rag fan control Gina fan control Digital input High pressure alarm High pressure alarm High pressure alarm High pressure alarm J5 1 ID1 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor circ 1 sensor circ
43. T 78 11 3 2 EVD 400 PLAN ca i Ad a i A at fa i a tl 79 11 3 3 Software Management nc cnc cc 79 sw Chiller Scroll 1 01 5 Scroll Manual 1 14 sw Chiller Scroll 1 01 6 Scroll Manual 1 14 1 GENERAL DESCRIPTION OF THE APPLICATION The software application to which this manual relates has been designed to manage all Cooling Only Heat Pump and Freecooling Chillers equipped with scroll compressors For this purpose we have implemented the option of using either a pCOXS or pCO1 electronic controller based on the type of chiller Given the differences in the inputs outputs some logics refer only to the more complete control system 2 CONTROL LOGIC 2 1 CONTROL OF INLET TEMPERATURE Inputs used e Evaporator inlet water temperature Parameters used e Control setpoint Setpoint menu e Proportional band for inlet temperature control User menu Setpoints and parameters H9 e Type of control User menu Setpoints and parameters H3 e Integration time if Proportional Integral control is enabled User menu Setpoints and parameters H3 e Hysteresis percentage for single compressor User menu Setpoints and parameters H3 Outputs used e Compressors On Off EX Diagram showing control logic with 4 compressors and 100 hysteresis 4 4compressors ON 4 1 1 compressor ON 3 0 4compress OFF A Differential no of 2 compressors SetP SetP A SetP 2A SetP Diff inlet water T Figure 1 Control wi
44. Temperature Remote setpoint Remote setpoint Remote setpoint Remote setpoint J2 3 B2 adjustment outdoor adjustment outdoor adjustment outdoor adjustment outdoor temp sensor temp sensor temp sensor temp sensor Evaporator inlet water Evaporator inlet water Evaporator inlet water Evaporator inlet water J2 4 B3 NTC temperature temperature temperature temperature J2 5 B4 NTC Evaporator outlet water Evaporator outlet water Evaporator outlet water Evaporator outlet water temperature temperature temperature temperature Analog Output J3 1 Y1 0 10 V Fan control Fan control oe J3 2 Y2 0 10 V J3 3 Y3 PWM Fan control Fan control Digital Input JA IDA No voltage Summer Winter Summer Winter Summer Winter Summer Winter contact Changeover Changeover Changeover Changeover J4 2 ID2 patie Water flow switch alarm Water flow switch alarm Water flow switch alarm Water flow switch alarm No voltage High pressure alarm High pressure alarm High pressure alarm High pressure alarm J4 3 ID3 E triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor sensor No voltage Low pressure alarm Low pressure alarm Low pressure alarm Low pressure alarm J4 4 ID4 S triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor sensor No voltage J4 5 ID5 contact Remote On Off Remote On Off Remote On Off Remote On Off J4 6 IDG No volta
45. USER MANUAL SCROLL CHILLER LENNOX gt sw Chiller Scroll 1 01 2 Scroll Manual 1 14 TABLE OF CONTENTS 1 GENERAL DESCRIPTION OF THE APPLICATION esse esse sees eee ee eves ereer enrere nre 7 2 CONTROL LOGIC i a p dda 7 2 11 CONTROL OF INLET TEMPERATURE o piia sss get 3752 at 2953255762 s 7095292522202332 2 cerrara crac 7 2 1 1 O eo E St f TIT RT i TA A TFUE 8 2 1 2 PROPORTIONAL cOntTOl coccion ra A Er p pea 9 2 1 3 PROPORTIONAL INTEGRAL Control ss sese ee ee 9 2 2 SETPOINT 0 a TA 9 2 3 ON OFF ENABEING waves see A tie arate Rye 11 2 3 1 On Off by TIME ZONES ini secs eee iiin eae dada ee a iia age tana dvs a 12 2 3 2 Inhibition of compressor operation based on outdoor temperature 12 2 4 OPERATING MODE TTT 13 2 5 COMPRESSORS i i enn eee Nea ea aie annie ire 14 2 5 1 Compressor rotation siani eisin kd ii AA eee 14 2 5 2 Minimum ON time of a Compressor LL sees eee eee eee eee eee 14 2 5 3 Minimum OFF time of a COMPIeSSO cccceeeceeeeeceeeeeeeaeeeeaeeceeeeeseaeeeeaaeseeeeeseaeeesaeeseaaeeeeeeeeaas 14 25 4 Delay time between two start ups of different Compressors ss eee eee eee eee 15 2 5 5 Delay time between two consecutive start ups of the same COMpressor seen 15 2 5 67 ircuit Rotati ti aps isa e ia ad asista 15 2 6 FANS tt tada as 16 2 6 1 Condensation COMO litros ra 16 2 6 2 Evaporation Cont merci 18 2 7 WATER RE CIRGULATION PUMPS cc cocinan a A p g a d 19 2 7 1 Rotation OIE ide SEZ b
46. Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor circ 1 sensor circ 1 High pressure alarm High pressure alarm J5 2 ID2 24 Vac Vdc triggered by pressure triggered by pressure sensor circ 2 sensor circ 2 Low pressure alarm Low pressure alarm High pressure alarm High pressure alarm J5 3 ID3 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor circ 1 sensor circ 1 High pressure alarm High pressure alarm J5 4 ID4 24 Vac Vdc triggered by pressure triggered by pressure sensor circ 2 sensor circ 2 J5 5 ID5 24 Vac Vde Compressor thermal Compressor thermal Compressor thermal Compressor thermal alarm alarm alarm circ 1 alarm circ 1 J5 6 ID6 24 Vac Vde Compressor thermal Compressor thermal alarm circ 2 alarm circ 2 J5 7 ID7 24 Vac Vdc Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 J5 8 ID8 24 Vac Vdc Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 J7 ID9 24 Vac Vdc Water flow switch alarm Water flow switch alarm Water flow switch alarm Water flow switch alarm J7 2 ID10 24 Vac Vdc J7 3 ID11 24 Vac Vdc Phase direction alarm Phase direction alarm Phase direction alarm Phase direction alarm J7 4 ID12 24 Vac Vdc Remote On Off Remote On Off Remote On Off Remote On Off J8 2 I
47. ached the alarms of oldest date will be progressively erased Erasure is always possible from Maintenance menu History gt R2 Table of Alarm Codes and Descriptions ALARM CODE DESCRIPTION DEFAULT AL 001 Alarm from Digital Input G AL 002 Thermal Alarm Pump 1 G AL 003 Thermal Alarm Pump 2 G AL 004 Evaporator Water Flow Alarm G AL 005 Inlet Temp Sensor Alarm G AL 006 Outlet Water Temp Sensor Alarm Evaporator 1 G AL 007 Outlet Water Temp Sensor Alarm Evaporator 2 G AL 008 Press Sensor Alarm Circuit 1 G sw Chiller Scroll 1 01 32 Scroll Manual 1 14 AL 009 Press Sensor Alarm Circuit 2 G AL 010 Freecooling Temp Sensor Alarm G AL 011 Setpoint Adjustment Sensor Alarm N AL 012 Outdoor Temp Sensor Alarm N1 AL 013 Low Pressure Alarm Circuit 1 G AL 014 Low Pressure Alarm Circuit 2 G AL 015 High Pressure Alarm Circuit 1 G AL 016 High Pressure Alarm Circuit 2 G AL 017 Low Press Alarm from Sensor Circuit 1 G AL 018 Low Press Alarm from Sensor Circuit 2 G AL 019 High Press Alarm from Sensor Circuit 1 G AL 020 High Press Alarm from Sensor Circuit 2 G AL 021 Compressor Thermal Alarm Circuit1 G AL 022 Compressor Thermal Alarm Circuit2 G AL 023 Fan Thermal Ala
48. al 1 14 Return from EVAPORATOR Figure 25 General Layout of a Freecooling Unit 2 10 1 Activation of Freecooling Once the freecooling function has been enabled Manufacturer s menu Parameters Tk the logic will be activated when the chiller is operating if the following conditions hold true 1 Test on outdoor air User menu Setpoints and parameters He TG Text gt Delta FC OK Delta FC m FC Diff je Figure 26 2 Test on outlet water Manufacturer s menu Parameters Tn NO MIE 4 Tout Tmin iad React Diff p l Figure 27 3 None of the following alarms are active Thermal alarm condensation 1 Thermal alarm condensation 2 Flow alarm Antifreeze alarm evaporator 1 Antifreeze alarm evaporator 2 Pump thermal alarm Phase direction alarm DO DD DD D NB Activating the Freecooling function will cause the compressors to shut down momentarily for a period of time set from Manufacturer s menu Parameters gt Tm 2 10 2 Fan speed in Freecooling mode User menu gt Setpoints and parameters Hf Hg If the chiller is working exclusively in the freecooling mode fan operation will be controlled according to the following logic sw Chiller Scroll 1 01 25 Scroll Manual 1 14 0 Tout Setp min Setp max Figure 28 Fan Ctrl Freecooling where o Setp represents the active setpoint o min the sum of this parameter and the setpoint indicates determines the starting poi
49. al 1 14 t_setpoint_3 SECONDARY SETPOINT F3 SETTING zj ICool 00 0 C Heat 00 0 C Condition o configuration of digital input ID14 or ID6 with pCOXS as gt secondary setpoint User menu Setpoints and parameters H1 or H2 o selection of automatic setpoint adjustment by digital input User menu Setpoints and parameters H4 Setpoints for programmed time zones From the SETPOINT menu you can set time zones for every day of the week Setpoint menu F7 t_setpoint_7 SETPOINT TIME Z F7 IMon 00 00 00 00 ITue 00 00 00 00 IWed 00 00 00 00 Thu 00 00 Fri 00 00 Satz 00 00 00 00 ISun 00 00 00 00 At the same time you must set the summer and winter setpoints to be used during or outside the time zones Setpoint menu gt F4 F6 t_setpoint_4 TIME ZONES SETPOINT F4 SETTING IN time zone 00 0 C OUT time zone 00 0 C Conditions o clock card present o selection of automatic setpoint adjustment by time zones User menu Setpoints and parameters H4 Remote setpoint adjustment Setpoint menu F9 From the SETPOINT menu vou can enable the function for remotelv correcting the setpoint via an analog input The signal will be converted between the minimum and maximum values set from the menu The value thus obtained in degrees will then be added to the value derived from the main secondarv or t
50. al input High pressure alarm High pressure alarm High pressure alarm High pressure alarm J5 1 ID1 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure switch switch switch circ 1 switch circ 1 High pressure alarm High pressure alarm J5 2 ID2 24 Vac Vdc triggered by pressure triggered by pressure switch circ 2 switch circ 2 Low pressure alarm Low pressure alarm High pressure alarm High pressure alarm J5 3 ID3 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure switch switch switch circ 1 switch circ 1 High pressure alarm High pressure alarm J5 4 ID4 24 Vac Vdc K triggered by pressure triggered by pressure switch circ 2 switch circ 2 Compressor thermal Compressor thermal Compressor thermal Compressor thermal 792 DS HEDE alarm alarm alarm circ 1 alarm circ 1 Compressor thermal Compressor thermal aia ID na Ts ii alarm circ 2 alarm circ 2 J5 7 ID7 24 Vac Vdc Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 J5 8 ID8 24 Vac Vdc Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 J7 ID9 24 Vac Vdc Water flow switch alarm Water flow switch alarm Water flow switch alarm Water flow switch alarm J7 2 ID10 24 Vac Vdc General fan alarm General fan alarm General fan alarm 1 General fan alarm 1 J7 3 ID11 24 Vac Vdc Phase direction alarm
51. alent temperature dewpoint d main_2b l Tea ga U O i Main readings relative to circuit 1 in the case of water water units Inlet water temperature ee ee poe Outlet water temperature jCond temp 00 0 C Condenser Temperature AO main_3 a ee SSeS i A CIRCUIT 2 Main readings relative to circuit 2 Water IN 00 0 C Water OUT 00 0 C Cond press 00 0 bar Cond temp 00 0 C S main_4 pass ee Sa a l A DEFROST in the case of Heat Pump units PAETE Indication of whether the circuit is undergoing a defrost cycle Circuit 2 no AO main_5 the Se A eae oS s FREECOOLING in the case of Freecooling units IExt Temp 00 0 C Outdoor Temperature Status KORE b ICoil partial no Freecooling Status 13 ways valve closed Coil capacity control 3 way valve 6 2 CHILLER STATUS 6 2 1 Chiller Status Devices sw Chiller Scroll 1 01 39 Scroll Manual 1 14 t_sm_disp_01 COMPRESSORS Al CIti Essar ES je offt Care GL C3 off CB Prev HP on circl Prev HP on circ2 Heater off IFans 1 off 000 0 Fans 2 off 000 0 4 WAYS VALVE A5 Valve C1 gt Not Excited Valve C2 gt Not Excited 3 WAYS VALVE A6 gt closed COIL PARTIAL A7 SOLENOID gt not active EXTERN MODEM A8 Status Modem on stand by Dialled Number 0 sw Chille
52. always Active while circuit 1 is operating Not Active in heat pump mode optional and during a defrost cycle Effect stops the compressors of circuit 1 Low Pressure Alarm circuit 2 Input DIN4 pCO1 Present with pCO1 controller Active while circuit 2 is operating Not Active in heat pump mode optional and during a defrost cycle Effect stops the compressors of circuit 2 Configuration Manufacturer s menu Alarms Ua Enable yes no Reset automatic manual Delay o at compressor start up o while compressors are running As regards the low pressure alarm if the automatic reset function is enabled you can select an option that switches the reset to manual if a second low pressure alarm occurs within a certain interval of time after the first one Manufacturer s menu Alarms Uc 3 1 5 High Pressure Alarm triggered by Sensor High Pressure Alarm circuit 1 Input B1 Present always Active while unit is on Effect it stops the compressors of circuit 1 High Pressure Alarm circuit 2 Input B2 pCO1 Present with pCO1 controller Active while unit is on Effect it stops the compressors of circuit 2 Configuration Manufacturer s menu Alarms Ud Enable yes no Reset automatic manual Delay 1 999 s Setpoint bars Differential bars Alarm Status l differential setp Pressure 3 1 6 Compressor Thermal Alarm Thermal Alarm Circuit 1 Input DINS p
53. ameters The defrost logic defines the chiller s operation when the device statuses are as follows compressors ON Tans OFF 4 way valve reversed from the heat pump position This logic can be broken down into 3 phases Initial Override Main Phase Final Override A Initial Override Main Phase x Final i Override Figure 17 Defrost Phases Though not in the main phase where the chiller operates with the above described defrost logic in the other two phases it is possible to enable the override logics which alter the defined configuration 2 9 1 Start Defrost Logic Manufacturer s menu Parameters Td There exist two different logics for activating a defrost cycle namely 2 9 1 1 Pressure Threshold Logic Manufacturer s menu Parameters Te Defrosting will begin if the evaporation pressure remains beneath the start defrost threshold for a cumulative amount of time t1 t2 t3 equal to the defrost delay time and if at least one of the compressors of the circuit concerned is running The relevant parameters are Defrost start setpoint Time pressure remains below threshold Pressure Defrost starts Start setp ti t2 t3 Time Figure 18 Threshold Logic 2 9 1 2 Temperature Change Based Logic Manufacturer s menu Parameters gt Tf Tf2 Defrosting will begin if the saturated evaporation temperature falls beyond a certain set limit below the maximum detected during normal operat
54. analog input not overridden MAN analog input overridden with the value on the right If the override function has not been enabled from the Maintenance menu Manual Control M1 this screen will be displayed Active setpoint used by the control logic and any setpoint adjustment logics that may be active 6 5 MAINTENANCE MENU 6 5 1 Running hours m mant oref 3 Running hours P3 Compressor 1 Hours 000000 Reset no m_mant_oref_13 Running hours Pd Pump 1 Hours 000000 h Reset no 6 5 2 History m mant sto 01 Press ALARM to view the Alarm History sw Chiller Scroll 1 01 Running hours of compressor 1 may be reset Running hours of pump 1 may be reset From this screen pressing the ALARM key will call up the alarm history while pressing the arrow will take you to the next screen of this menu 42 Scroll Manual 1 14 m_mant_sto_02 Erase history database no 6 6 MANUFACTURER S MENU 6 6 1 initialisation and password m cost iniz 01 Reset all the parameters to the default values no 6 7 INFO MENU t info 1 IV ChillerScroll 1 00 JC 000001 ID 05 2007 Language German t_info_2 Ho X2 CONFIGURATION WORD 00000 00000 sw Chiller Scroll 1 01 Screen for restoring the default parameters indicated in this
55. ard pCO series terminals and for downloading application program 6 pLAN local network connector 7 tLAN terminal connector 8 LAN or MP Bus network connector 9 Digital relay outputs with 1 common 10 Digital relay output 11 Alarm digital relay output with changeover contact SSR 12 Yellow power ON LED and 3 LEDs for indicating the pCOXS status 13 Flap for installing serial card optional 14 Flap for installing clock card optional 15 Built In Terminal non provided 8 1 3 Analog Input Configuration Given the presence of analog inputs designed to accept different sensors the inputs themselves must be configured from the screens of the Manufacturer s menu gt Parameters S6 S8 In the case of the pCO1 controller it is also necessary to configure the respective dipswitches as shown in the figure below Bi B2 B3 B4 B5 B6 da pias COONAN MARTAN ov 123456 DONE 10T me 456 123456 HI 0 20mA Input B4 B2 B3 B4 m 123456 DUONAN MERDAN 0y 123456 123456 Input ON digital input Esempio Example OFF NTC gt z nN w D n D cu ma E En gt rm w A a a B1 B2 B3 BA B5 B6 0 il LI N OFF OFF ony NTC 0 20mA 05V NTC digital input digital NTC input sw Chiller Scroll 1 01 52 Scroll Manual 1 14 8 2 DESCRIPTION OF INPUTS OUTPUTS pCO1 8 2 1 e Cooling Only W
56. arm High pressure alarm High pressure alarm High pressure alarm J4 3 ID3 S triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor sensor No voltage Low pressure alarm Low pressure alarm Low pressure alarm Low pressure alarm J4 4 ID4 E triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor sensor No voltage J4 5 ID5 contact Remote On Off Remote On Off Remote On Off Remote On Off J4 6 IDG No voltage Serious alarm Serious alarm Serious alarm Serious alarm contact Secondary Setpoint Secondary Setpoint Secondary Setpoint Secondary Setpoint Digital Output J9 2 NO1 NO relay Compressor 1 Compressor 1 Compressor 1 Compressor 1 J9 3 NO2 NO relay Electric heating element Compressor 2 Electric heating element Compressor 2 J9 4 NO3 NO relay Pump ON OFF Pump ON OFF Pump ON OFF Pump ON OFF J10 2 NO4 NO relay J11 1 NOS NO rela Global alarm Serious Global alarm Serious Global alarm Serious Global alarm Serious y alarm Non serious alarm alarm Non serious alarm alarm Non serious alarm alarm Non serious alarm e Heat pump Heat Pump pcoXS Water Air Water Water Conn Name Signal 1 Circuit 1 Circuit 1 Circuit 1 Circuit 1 Compressor 2 Compressors 1 Compressor 2 Compressors Analog input 4 20mA 0 5V x Condensation Condensation J2 2 B1 INTC Condensation Pressure Condensation Pressure Temperature
57. as during normal heat pump operation until halfway through the interval sw Chiller Scroll 1 01 22 Scroll Manual 1 14 Compressors OFF phase main phase Y m interval Figure 21 Devices controlled by override in the case of Compressors OFF when Defrosting Begins NB In the absence of an override the fans and valve maintain the status determined by the defrost logic 2 9 3 2 Final Override Compressors OFF when defrosting ends Manufacturer s menu Parameters Th This logic defines an interval of time in which the compressors are shut down via the override function The 4 way valve is switched into the same status as during heat pump operation in the second half of this interval main phase Compressors OFF phase Ye interval Figure 22 Devices controlled by override in the case of Compressors OFF when Defrosting Ends NB In the absence of an override the fans and valve maintain the status determined by the defrost logic 2 9 3 3 Final Override Post Ventilation Manufacturer s menu Parameters Ti This logic defines an interval of time following the main phase in which fan operation and fan speed are controlled via the override function main phase Post Ventilation Se gt Figure 23 Devices controlled by override in the case of Post Ventilation when Defrosting Ends NB In the absence of an override the compressors will remain on maintaining the status determined by the defrost logic A
58. ascade Control F a none standard JA 1 Unit Rotation Logic in LAN standard with standby 2 Unit rotation time in LAN 24 0 9999 h J5 1 Delay in next start up of compressors 2 0 999 S feet 1200 2400 4800 1 Communication speed 19200 9600 19200 bps J6 Identification number 1 1 200 nae Carel Modbus Communication protocol Carel Lon Rs232 GSM 7 2 3 User Alarms Screen Par Description Default Range UOM User all serious not K1 1 Type of alarm digital output all serious 2 alarm digital output logic n o n o n c K2 alarm configuration Serious Not Serious Go i Serious Not Serious K3 alarm configuration Serious Not Serious E Fri Serious Not Serious 7 2 4 User Clock Screen Par Description Default Range UOM User 1 Start of first interval of TIME ZONE 1 hour 8 0 23 h 2 Start of first interval of TIME ZONE 1 minutes 0 0 59 min 3 End of first interval of TIME ZONE 1 hour 12 0 23 h 4 End of first interval of TIME ZONE 1 minutes 0 0 59 min 5 Start of second interval of TIME ZONE 1 hour 13 0 23 h L2 6 Start of second interval of TIME ZONE 1 minutes 0 0 59 min 7 End of second interval of TIME ZONE 1 hour 20 0 23 h 8 End of second interval of TIME ZONE 1 minutes 0 0 59 min 9 Start of TIME ZONE 2 hour 8 0 23 h 10 Start of TIME ZONE 2 minutes 0 0 59 min 11 End of TIME ZONE 2 hour 18 0 23 h 12 End of TIME ZONE 2 minutes 0 0 59 min 7 3 1 Maintenance Manual Control Scree
59. cases the value of the outputs will depend on the control logic sw Chiller Scroll 1 01 60 Scroll Manual 1 14 9 SUPERVISION 9 1 MAIN PARAMETERS The configuration of the supervision logic can be set from the User menu LAN and Supervision J6 and involves defining e communication protocol e communication speed e serial address of the unit You can select from among the following Communication Protocols Carel RS485 Local Supervisor Protocol for communication with Carel supervision systems Modbus LonWorks RS 232 analog modem GSM GSM modem Communication Speed baud rate 1200 baud 2400 baud 4800 baud only speed possible with LonWorks network 9600 baud 19200 baud Address of peripheral unit in the network e 1 200 9 2 CONNECTION WITH CAREL MODBUS PROTOCOL The connection for supervision with the Carel or Modbus protocol is achieved via an RS485 Figure 30 serial card available on request in the pCO controller Figure 30 RS485 Serial Card In order to make a connection to the supervisor terminal the unit must be connected to an RS485 RS232 converter or similar device using a suitable cable 2 wires shield AWG22 24 and then from the converter to the computer itself 1 unit under supervision 2 or more units under supervision sw Chiller Scroll 1 01 61 Scroll Manual 1 14 9 3 CONNECTION WITH LONWORKS PROTOCOL A connection can be made to the LonWorks network using the connector with ex
60. ctive for LAN Cooling Indication of which units are physically connected to pLAN OnLine connected Off Line disconnected Indication of enabled LAN logic where applicable Stand Alone LAN logic not active Master LAN logic active in unit 1 Slave LAN logic active in a unit other than number 1 Inlet water temperature used by the Master unit for the purpose of the control logic If the Master unit pump is off this value will be the average of the other units connected If the Master unit is off it indicates the active operating mode in which the slave units will start up 6 3 INPUTS OUTPUTS MENU 6 3 1 Inputs Outputs Menu I O Status sw Chiller Scroll 1 01 41 Scroll Manual 1 14 t_io_stato_01 ANALOG INPUTS D1 Bl 00 0bar BZ 70070586 IB3 00 0 C IBA 00 0 C l A t io forz 01 l A ANALOG INPUTS El Override Bl AUTO 00 0bar B2 AUTO 00 0 C B3 AUTO 00 0 C IBA AUTO 00 0 C 4 t_io_forz_99 HO Override Not Enabled Active Fl Setpoint 00 0 C secondary ETA l time zones remote adjust compensation bounded It displavs the status of the analog inputs value resulting from an override where present Inputs Outputs Menu I O Override Indication of the value assigned to the analog input and the value applied in the case of an override AUTO
61. cular low temperature conditions the chiller could end up outside its operating range being forced to evaporate at too low a temperature Compr inhibited Compr not inhibited Outdoor T Setp Setp Diff 2 4 OPERATING MODE For heat pump models the operating mode can be selected using different solutions some of which can be enabled from User menu LAN and Supervision J2 Unlike in the case of On Off logics here the logic will be determined according to priority The possible methods for selecting the unit s operating mode cooling heating are shown below in order of priority 1 via Digital input 2 from the Kevboard or via the Supervisor When the chiller is switched on the control logic will check the operating mode and show this information on the main screen the correspondence between the svmbol used on the displav and the mode can be configured from the User menu Setpoints and parameters Hh ul 08 00 01 01 00 IN 12 06 OUT 12 5 C BB Don sw Chiller Scroll 1 01 13 Scroll Manual 1 14 NB If the units are controlled via a LAN based system the operating mode can be selected only on the Master unit This will activate the same mode for the Slave units as well overriding the other methods of mode selection 2 5 COMPRESSORS The controller permits the management of hermetic scroll compressors The number of compressors and circuits is set from the screens of t
62. de for compr ON in FC mode 5 0 999 min 1 Enable low load logic no no yes Chiller Heat Pump Tw 2 Low load logic application mode Chiller Chiller Heat Pump 3 Max compr On for low load definition 120 T1 2 999 S Tx 1 Differential in low load Chiller 5 0 0 0 10 0 2 Differential in low load Heat Pump 5 0 0 0 10 0 Ty 1 Duration of ON enabling by Master unit 5 0 999 S 1 Enable compr inhibition on Text Heat Pump no no yes Tz 2 Set compr inhibition on Text Heat Pump 10 0 99 9 99 0 3 Compr inhibition differential on Text Heat Pump 1 0 0 0 9 9 C 7 4 3 Manufacturer Alarms Screen Par Description Default Range UOM Manufacturer U1 1 Enable sensor fault alarm yes no yes 2__ Sensor fault alarm delay 10 0 9999 S 1 Enable sensor B1 fault alarm pCOXS yes no yes U2 2 Enable sensor B2 fault alarm pCOXS yes no yes 3 Enable sensor B3 fault alarm pCOXS yes no yes 4 Enable sensor B4 fault alarm pCOXS yes no yes 1 Enable sensor B1 fault alarm pCO1 yes no yes 2 Enable sensor B2 fault alarm pCO1 yes no yes 2 Enable sensor B3 fault alarm pCO1 no no yes U3 4 Enable sensor B4 fault alarm pCO1 yes no yes 5 Enable sensor B5 fault alarm pCO1 yes no yes 6 Enable sensor B6 fault alarm pCO1 no no yes 7 Enable sensor B7 fault alarm pCO1 no no yes 8 Enable sensor B8 fault alarm pCO1 no no yes U5 1 Enable clock alarm no
63. e Driver 1 0 0 4 0 21 0 Va 1 Superheat setpoint Chiller Mode Driver 2 0 0 0 0 50 0 2 Low superheat Chiller Mode Driver 2 0 0 4 0 21 0 1 Percentage of EEV opening Heat Pump Mode 0 0 100 Vb 2__ Proportional constant Heat Pump Mode 0 0 0 0 99 9 3 Integration time Heat Pump Mode 0 0 999 S Ve 1 Superheat setpoint Heat Pump Mode Driver 1 0 0 0 0 50 0 C 2 Low superheat Heat Pump Mode Driver 1 0 0 4 0 21 0 Vd 1 Superheat setpoint Heat Pump Mode Driver 2 0 0 0 0 50 0 C 2 Low superheat Heat Pump Mode Driver 2 0 0 4 0 21 0 C 1__ Percentage of EEV opening Defrost Mode 0 0 100 Ve 2__ Proportional constant Defrost mode 0 0 0 0 99 9 3 Integration time Defrost mode 0 0 999 S Vi 1 Superheat setpoint Defrost Mode Driver 1 0 0 0 0 50 0 2 Low superheat Defrost Mode Driver 1 0 0 4 0 21 0 Vg 1 Superheat setpoint Defrost Mode Driver 2 0 0 0 0 50 0 2 Low superheat Defrost Mode Driver 2 0 0 4 0 21 0 1_ Dead band Superheating 0 0 0 0 9 9 C Vh 2 Derivative time Superheating 0 0 0 0 99 9 S 3 Integral time low superheat 0 0 0 0 30 0 S 4 Integral time LOP 0 0 0 0 25 5 S Vi 1 Integral time MOP 0 0 0 0 25 5 S 2 MOP start up delay 0 0 500 S Vj 1 Dynamic proportional control no no yes 2 EEV block control 0 0 999 S Vk 1 High condensation temp alarm 0 0 0 99 9 c 2 I
64. e User menu LAN and Supervision J6 J7 It is first necessary to set the type of protocol to be used e Communication protocol GSM e Communication speed bps Then the modem options e Number of rings e Number of the mobile phone to which SMS messages will be sent e Password for blocking incoming messages sw Chiller Scroll 1 01 65 Scroll Manual 1 14 9 4 6 Modem Configuration The chiller that will be installed with the modem kit must be configured with the address pLAN 1 therefore in the case of a LAN system this unit will have to be the Master rs H CE The SIM used in the GSM Modem requires the following steps to be carried out Enable the data transfer function Disable the prompt to enter the PIN Delete all messages present Insert the SIM card in the modem using the holder provided SIM card e As N V N a le lt a S SIM card holder TEE N N Yellow button to eject the holder with a sharp element This kit requires the installation of an RS232 card in the pCO controller in order to make the connection with the kit itself The card will have to be inserted in the only seat provided for a Serial Card l m mii r m v 9 4 7 Modem status In the Chiller Status menu Devices A8 vou can find an indication as to the modem status 9 5 OTHER SUPERVISION PROTOCOLS Configuring the microcontroller with the Carel protocol allows the chiller to be interfaced with o
65. e derived from the conversion of the pressure value DRIVER 1 B3 PROTECTION Tripping of low superheat LowSH No HtCond No gt Tripping of high condensation temperature protection rotection LOP No MOP No p m an Tripping of high condensation Tripping of LOP protection temperature protection DRIVERS B7I IDrvi Version 000 000 Hardware version Software version sw Chiller Scroll 1 01 80 Scroll Manual 1 14 It is also possible to manually override valve settings from the screens of Maintenance menu Manual Control d manual di HZ MANUAL CONTROL MA DRIVER 1 EEV Mode AUTO gt By selecting MAN you can set the required ea A TE IRequested steps 0000 valve steps IEEV Position 0000 1 f A Valve steps requested in manual operation Number of opening steps the valve must reach read only value Any valve faults will be indicated in the next screen along with the options for managing them d_gohead_dl DRIVER 1 STATUS M5 No Warnings sw Chiller Scroll 1 01 81 Scroll Manual 1 14 sw Chiller Scroll 1 01 82 Scroll Manual 1 14 sw Chiller Scroll 1 01 83 Scroll Manual 1 14 LENNOX gt sw Chiller Scroll 1 01 84 Scroll Manual 1 14
66. e the evaporation control function by configuring a setpoint and differential Manufacturer s menu Parameters T8 and overrides Manufacturer s menu Parameters T9 Ta Below we illustrate how the above described logics work in controlling condensation e On Off Control Fan 100 differential 0 Pressure setp seto diff Figure 11 Evaporation On Off Ctrl sw Chiller Scroll 1 01 18 Scroll Manual 1 14 e Modulating Control Fan output Max 2 100 Max 1 Min 0 IN Pressure setp setp diff Figure 12 Modulating Ctrl with 0 10V output 2 7 WATER RE CIRCULATION PUMPS The number of pumps that can be managed by the control software depends on the type of microcontroller used 2 pumps can be used only with a pCO1 controller 2 7 1 Rotation logic User menu Setpoints and Parameters If 2 pumps are installed it will be possible to choose between e Manual Rotation e Automatic Rotation 2 7 1 1 Manual Rotation This type of logic entails choosing which pump will be used during normal chiller operation The second pump will be switched on only if the first pump goes into an alarm status If an alarm occurs in the second pump as well the unit will be stopped 2 7 1 2 Automatic Rotation If the automatic rotation option is selected it will also be necessary to set the pump changeover or rotation time The events that can interact with normal pump rotation are e switching off of the u
67. ecifying in the event that the chiller is OFF the condition that imposes this status U1 08 00 01 01 00 IN 12 0 C OUT 12 5 C The indication shown may be e ON chiller on all On Off logics of the unit enable operation OFF Alarm chiller off because an alarm has occurred Irrespective of the status of the enabled On Off logics some alarms will cause the unit to shut down OFF Superv chiller switched off by Supervisor OFF Time Z chiller off according to scheduled time zones OFF Remote chiller switched off by remote digital contact OFF Keyboard chiller switched off from the keyboard If this option is disabled it will no longer be possible to change the unit s status from the keyboard NB If the chiller has been switched off from the keyboard and then this control mode is disabled it will no longer be possible to switch on the unit e Standby chiller switched off by the Master unit This status of the unit depends on the use of LAN logic and the setting of a specific type of rotation mode on the Master unit 2 3 1 On Off by Time Zones If the optional clock card is installed it will be possible to schedule the unit On Off times according to time zones Enabling requirements o Clock card installed o The On Off by time zones option must be enabled User menu LAN and Supervision J1 t user lan 1 UNIT ON OFF J1 Enable On Off by time zones yes Setting On Off Time Z
68. ently over time it must be put through an open and close cycle after a certain interval of time has elapsed without any switching operations This time can be set from Manufacturer s menu Parameters To Tp Note During the override rotation phase the freecooling fault alarm is inhibited sw Chiller Scroll 1 01 27 Scroll Manual 1 14 3 ALARMS 3 1 ALARM MANAGEMENT 3 1 1 Phase Direction Alarm Input DIN 11 Present with pCO1 controller Active always Effect it stops the unit the pump will shut down after a set delay time Configuration Manufacturer s menu Alarms Uk Enable yes no Delay time not provided Reset automatic manual 3 1 2 Sensor Alarms Sensor alarms are triggered when the sensor reading is outside the range of values typical of normal operating conditions The sensors and the effects that will ensue in the event of an alarm are Inlet water temperature sensor disables operation of all compressors Outlet water temperature sensor evaporator 1 disables the heating element as well as the compressors of circuit 1 and circuit 2 if a single evaporator is present Outlet water temperature sensor evaporator 2 disables the heating element and the compressors of circuit 2 Pressure sensor circuit 1 causes the fans to switch on it will not disable compressor operation but will terminate any defrost cycle underway Pressure sensor circuit 2 causes the fans to switch on it will not disable c
69. er amp but it must not be preceded by a dot Let s see some examples 1 To receive information on the status of unit 1 it is necessary to send a message in which the analog variable selection of unit for information retrieval is set as 1 and the digital variable request sending of message on status of selected unit is likewise set as 1 Assuming that the modem password has not been set the message must be configured as follows PCO1 0000 A 001 000001 D 050 0000018 Tipo Indirizzo Descrizione selezione unita per recupero informazioni Tipo Indirizzo Descrizione D 50 tichiesta invio messaggio stato unit selezionata the reply message will be sent only to the phone number specified in the modem settings 2 To receive a message containing the values of the control parameters editable via GSM it is necessary to send an SMS message configured as follows PCO1 0000 D 051 0000018 Tipo Indirizzo Descrizione D 51 jrichiestainvio messaggio con parametri via GSM 3 You can send a message to set some control parameters heating setpoint on 10 88 and cooling differenti al on 1 58 and request another message to be sent repor ting the values of these parameters previous example sw Chiller Scroll 1 01 64 Scroll Manual 1 14 PCO1 0000 A 033 000015 A 032 000108 D 051 0000018 Descrizione setpoint riscaldamento Cx10 differenziale setpoint raffreddamento Cx 10
70. erride function Periodic Override Where enabled Manufacturer s menu Parameters Tt there are two override logics that periodically determine a reduction in coil capacity The purpose of these logics is to restore the balance of oil within the cooling circuit o Logic A Manufacturer s menu Parameters Tu if the compressors remain idle for a period longer than the set Comp off T when they start up again the solenoid valve will be kept open for a time equal to Override T o Logic B Manufacturer s menu Parameters gt Tv if the compressors continue to run while the freecooling logic is also enabled for a period longer than Comp FC on T the solenoid valve will be kept open for a time equal to Override T High pressure prevention function Manufacturer s menu Parameters Tr To prevent the triggering of a high pressure alarm the capacity control function is deactivated when the condensation pressure reaches the setpoint value sw Chiller Scroll 1 01 26 Scroll Manual 1 14 Capacity reducing override OFF Bacity reduction w o dverride ca L Set Diff R E Figure 29 Low pressure prevention function Manufacturer s menu Parameters Ts To prevent the triggering of a low pressure alarm in the event that the freecooling mode is not active the capacity control function is activated when the condensation pressure reaches the setpoint value Capacity red override O
71. es general information regarding the status of the unit and its main components It is in turn divided into 3 submenu items e Devices status of compressors heating element fans pumps e Electronic valve status of the electronic valves and reading of sensors e LAN indication of any units connected to the LAN Inputs Outputs Menu From this menu it is possible to view and if necessary override the status of all controller inputs and outputs The submenu items are s 1 O status the statuses of the analog and digital inputs and analog and digital outputs are displayed in order e 1 0 override if enabled from the maintenance menu all inputs and outputs read and governed by the pCO can be manually controlled Setpoint Menu Management of fixed setpoint and variable setpoint User Menu From this menu password protected 700 it is possible to configure the main chiller control logics This menu is in turn divided into e Setpoints and Parameters control logic setpoint management compressor rotation and any configurable digital inputs sw Chiller Scroll 1 01 35 Scroll Manual 1 14 e LAN and Supervision enabling of On Off logics and summer winter changeovers LAN logic and selection of parameters for serial communication e Alarms configuration of the digital alarm output and definition of serious alarms e Clock clock setting and programming of unit ON OFF time zones only where a clock card is installed Maintenance Menu
72. esponse to simultaneous requests 10 2 4 LAN Status An immediate indication of the LAN status of the chiller can be found at the top of the main screen HL ooo l u 08 00 01 01 00 IN 14 0C OUT 12 5 C This indication will be present in the Master unit once the LAN has been enabled see 10 2 3 in the Slave units it will be present only if the presence of the Master unit is detected NB We Shall again note that a unit can function as Master if o its address is pLAN 1 o ithas enabled the LAN logic More detailed indications can be found in the Chiller Status menu LAN C1 where it is possible to view the LAN status t sm lan 01 Unit 1 0ff Line Unit 2 Off Line Unit 3 0ff Line Unit 4 0ff Line The possible indications for each unit making up the system are o Unit k Off Line the unit with the kth address is not present in the system or is not connected to the chiller you are working on o Unit k On Line Alone the unit with the kth address is connected via the LAN to the chiller you are working on but is operating in the Stand Alone mode o Unit k On Line Master Slave the unit with the kth address is connected via the LAN to the chiller you are working on and has the function of Master or Slave 10 2 5 Switching on Units Unlike in the case of Stand Alone operation where units are connected in a LAN it will only be possible to choose the operating mode Cooli
73. et Water Temp Sensor Alarm Condenser 1 D R 120 120 Outlet Water Temp Sensor Alarm Condenser 2 D R 121 121 Analog Variables CAREL MODBUS VARIABLE TYPE R W ADDRESS ADDRESS Condensation Pressure Circ 1 A R 1 1 Condensation Pressure Circ 2 A R 2 2 Inlet Water Temperature A R 3 3 Outlet Water Temperature Evaporator 1 A R 4 4 Outlet Water Temperature Evaporator 2 A R 5 5 Outdoor Temperature A R 6 6 Freecooling Temperature A R 7 7 Active Setpoint A R 8 8 Condensation Ctrl Setp A R 9 9 Condensation Ctrl Diff A R 10 10 Evaporation Ctrl Setp A R 11 11 Evaporation Ctrl Diff A R 12 12 Min setpoint Cooling A R 13 13 Max setpoint Cooling A R 14 14 sw Chiller Scroll 1 01 68 Scroll Manual 1 14 Min setpoint Heating A R 15 15 Max setpoint Heating A R 16 16 Setpoint Adjustment A R 17 17 Setpoint Cooling A R W 31 31 Setpoint Heating A R W 32 32 Control Band Cooling A R W 33 33 Control Band Heating A R W 34 34 Secondary Setpoint Cooling A R W 35 35 Secondary Setpoint Heating A RAW 36 36 Setpoint in time zone Cooling A RAW 37 37 Setpoint outside time zone Cooling A RAW 38 38 Setpoint in time zone Heating A R W 39 39 Setpoint outside time zone Heating A R W 40 40 DRV 1 SuperHeat A R 100 100
74. ge Serious alarm Serious alarm Serious alarm Serious alarm contact Secondary Setpoint Secondary Setpoint Secondary Setpoint Secondary Setpoint Digital Output J9 2 NO1 NO relay Compressor 1 Compressor 1 Compressor 1 Compressor 1 sw Chiller Scroll 1 01 59 Scroll Manual 1 14 J9 3 NO2 NO relay Electric heating element Compressor 2 Electric heating element Compressor 2 J9 4 NO3 NO relay Pump ON OFF Pump ON OFF Pump ON OFF Pump ON OFF J10 2 NO4 NO relay 4 way valve 4 way valve 4 way valve 4 way valve Jit 1 NOS NO relay Global alarm Serious Global alarm Serious Global alarm Serious Global alarm Serious alarm Non serious alarm alarm Non serious alarm alarm Non serious alarm alarm Non serious alarm 8 3 INPUT OUTPUT OVERRIDE Once the function for overriding the inputs outputs of the electronic controller have been enabled Maintenance menu Manual Control M1 they can be manually set from the Inputs Outputs menu I O Override Below is an example of how digital inputs are overridden t io forz 14 IDIGITAL OUTPUTS Ee Override INOI AUTO a INO2 AUTO a INO3 AUTO os INO4 MAN a NO5 MAN The Override column shows the logical value that will be used for the respective digital output In this example only NO4 and NOS are actually overridden since the MAN manual option has been selected In the other
75. he Manufacturer s menu gt Unit Config S2 The majority of the interventions effected by the pCO controller are subject to delay times programmable from the manufacturer s menu These delays are designed to assure correct operation of the compressors and increase the stability and lifespan of the system 2 5 1 Compressor rotation User menu gt Setpoints and Parameters Compressors are switched on in turns so that the number of running hours and starts stops of different compressors are equally divided The method of rotation can follow two different logics e FIFO the first compressor to start will be the first one to stop e LIFO the last compressor to start will be the first to stop The unit s operation may initially result in large differences in the running times of the various compressors but under normal working conditions they will eventually become very similar EX FIFO rotation with four compressors e ON sequence C1 C2 C3 C4 e OFF sequence C1 C2 C3 C4 EX LIFO rotation with four compressors e ON sequence C1 C2 C3 C4 e OFF sequence C4 C3 C2 C1 2 5 2 Minimum ON time of a compressor Manufacturer s menu Parameters T1 It establishes the minimum time in seconds for which the compressors must remain on therefore once thev start up thev must keep running for a period at least equal to the set time ON demand eee IN OEE E l ON Compr OFF Figure 3 Minimum compressor ON time
76. he chiller to keep working with both compressors on This causes the outlet water temperature to cool by a further 5 thus bringing it to 8 The effect of this hysteresis step is to produce colder water in a less critical phase one in which theoretically speaking such a large thermal differential would not be necessary Where we have the option of modifying the dimension of the hysteresis window we can thus reduce this undercooling effect Below we give two examples with reduced hysteresis 1 Hysteresis 50 Tout 13 12 11 10 12 13 14 15 Tin sw Chiller Scroll 1 01 8 Scroll Manual 1 14 2 Hysteresis 30 Tout 13 12 Pude eta 11 10 ca E 12 13 14 15 Tin We may note that narrowing the hysteresis window has the effect of shifting the reference temperatures at which the number of active capacity control steps will be reduced consequently the compressors will switch off earlier The output water will thus be less cold on average Referring to the critical point highlighted in the example with 100 hysteresis we can see that we will go from a temperature of 8 with 100 hysteresis to a value jus t below 9 C with 30 hysteresis It is important to bear in mind that an excessive reduction in this parameter may lead to a condition of instability and a larger number of compressor ON OFF switching operations 2 1 2 PROPORTIONAL control When selected from the User menu Setpoints and parameters H3 the
77. ial band unit 1 40 MASTER hysteresis unit 1 100 Unit 1 Master Unit 2 Slave ki Local Area Network e STEP CONTROL System cooling Unit I Wir L 100 75 50 25 0 12 13 14 15 16 Inlet T MASTER Setpoint Setpoint differential In the overall operation of the system the passage from 0 to 100 will see the switching on in sequence of N compressor of unit I 1 of unit II 2 nd of unit I 2 of unit I I sw Chiller Scroll 1 01 70 Scroll Manual 1 14 e CASCADE System cooling capacity 93 ii i Unit I 100 75 50 25 0 12 13 14 15 16 Inlet T MASTER Setpoint Setpoint differential In the overall operation of the system the passage from 0 to 100 will see the switching on in sequence of 1 and 2 compressors of unit I 1 and 2 compressors of unit I I 10 1 2 Rotation Logic In addition to the two logics adopted to divide the duty loads between units you can also select which type of rotation to adopt When the rotation function is active the unit identified as T in the previous examples will not necessarily be the chiller having the LAN address 1 but will rather be the first unit in the list of priorities as defined on each occasion by the rotation logic The 3 rotation options are User menu LAN and Supervision J4 e No Rotation MASTER e Standard Rotation MASTER pLAN 1 Unit III sw Chiller Scroll 1 01 71 Scroll Ma
78. ime zone setpoint t setpoint 9 ISETPOINT REMOTE F9 ADJUST Enable no Min 00 0 C IMax 00 0 C Condition o pCO1 use of analog input B3 o pCOXS with analog input B2 configured for remote setpoint adjustment Manufacturer s menu Unit Config S7 Setpoint Compensation Setpoint menu Fa Fb The compensation function corrects the control setpoint based on the outdoor temperature For both the heating and cooling modes it is possible to select a compensation setpoint differential and max adjustment sw Chiller Scroll 1 01 10 Scroll Manual 1 14 The logic works as follows Corrected setp Differential lt 0 Corrected setp Differential gt 0 Max Comp gt 0 Max Comp gt 0 Max Comp Max Comp Setpoint Setpoin Text l I 1 l l l U l l l 4 l 1 l l l Comp Setp Diff Corrected setp Differential lt 0 Corrected setp Differential gt 0 Max Comp lt 0 Max Comp lt 0 Setpoint Setpoint Max Comp Max Comp Text Text l l l l U l l l 1 l l l U l Diff Comp Setp Compi Setp Diff EX Let us assume we have set the following parameters for the cooling mode e Cooling setpoint 12 C e Compensation setpoint 30 e Differential 10 e Max compensation 4 C When the outdoor temperature is less than 30 the control setpoint assuming that no other setpoint adjustment logics are active will be 120 When the outdoor temperature is bet
79. int Setpoint differential Figure 8 Unbalanced Rotation 2 6 FANS 2 6 1 Condensation control Manufacturer s menu gt Unit Config Condensation control entails first of all configuring the number of series of fans 0 2 and the type of control output o PWM output o 0 10V output The output used must be configured according to the type of speed regulator and fan used in order to define the operating range 0 10V output o Min V minimum fan operating voltage o Max V 1 maximum voltage for the fan pulse width modulation ramp where present o Max V 2 maximum fan operating voltage sw Chiller Scroll 1 01 16 Scroll Manual 1 14 PWM output o Min Triac minimum phase difference o Max Triac maximum phase difference o WdTriac duration of triac pulse As regards the condensation control logic besides the option of disabling it in which case there will not be any enabling of the fans there are two control modes to select from Manufacturer s menu gt Unit Config S5 o On Off Control o Modulating Control Both logics work on the basis of the condensation pressure the respective parameters and functions are illustrated below 2 6 1 1 On Off Control Manufacturer s menu Parameters TB Configuration Parameters o setpoint o differential Based on the condensation pressure within the circuit the fans will be made to operate at 0 or 100 of their capacity If the fans are controlled by means of a 0 10V
80. iod 000 hours Sequence cup T OFF delay time Another pump configuration parameter is the delay with which it will switch off after the compressors have stopped This time which can be set from the Manufacturer s menu Parameters Tb is also used to set the time by which the pump will start up in advance when the unit is switched on 2 8 ELECTRICAL HEATING ELEMENTS Inputs used e Evaporator 1 outlet water temperature sensor B4 pCO XS B5 pCO1 e Evaporator 2 outlet water temperature sensor B6 pCO 1 Outputs used e NO7 pCO1 controller e NO2 pCO XS controller NB in the case of a pCOXS controller the heating element must be enabled from the manufacturer s menu Manufacturer s menu Unit Config Sa Control parameters Manufacturer s menu Parameters T3 Enabling Setpoint Differential differential OFF Tout setp Figure 16 Heating Element Logic sw Chiller Scroll 1 01 20 Scroll Manual 1 14 Operating logic The temperature used in the heating element control logic in the case of a unit with a single evaporator is the one read by the sensor on the outlet side in the case of two evaporators the lower of the two outlet water temperatures will be taken If an error occurs in one of the two sensors the incorrect reading will be ignored if no reliable reading is available the heating element will be disabled 2 9 DEFROST FUNCTION Manufacturer s menu Par
81. ion sw Chiller Scroll 1 01 21 Scroll Manual 1 14 The relevant parameters are Change in relation to the maximum saturation temperature detected such as to trigger the beginning of a defrost cycle Delay time for memorisation of the maximum saturation temperature following compressor start up Saturation temp e Defrost starts Time Figure 19 Change Based Logic 2 9 2 Main Phase During this phase the unit is controlled according to the normal defrost logic described above Main Phase Y gt Figure 20 Defrosting Main Phase The causes that may bring this phase to an end are exceeding of the threshold the pressure rises above the stop defrost threshold defined in the start defrost logic timeout the main phase has lasted beyond the maximum time set Manufacturer s menu Parameters gt Ta Whichever condition occurs first will cause the main defrosting phase to be terminated 2 9 3 Override phases Manufacturer s menu Parameters The following override phases which can be enabled separately allow the user to configure custom settings for chiller operation at the beginning and end of the defrost logic 2 9 3 1 Initial Override Compressors OFF when defrosting begins Manufacturer s menu Parameters Tg This logic defines an interval of time that precedes the main phase and in which the compressors are shut down via the override function The 4 way valve is switched into the same status
82. larMiinci a 32 3 1 14 Digital Alarm e e iscsi eed id a f ada 32 3 2 ALARM HISTORY iet i i fein erie done igi E het nieve ete 32 4 USER INTERFACE ii cd 34 4 1 DESCRIPTION OF KEYBOARD ll A EA EA HA AAAAAAAAHAMIMHAMEENEAEANZAMEMzEZEEEEE 34 4 2 SWITCHING ON THE UNIT AND SELECTING THE OPERATING MODE sxs sese ee eee eee ee eee 34 43 SWITCHING OFF OF THE UNIT ae ar ep aa e tad 35 4 4 GENERAL DESCRIPTION OF MENUS sse eee eee 35 4 5 USER INTERFACE CONNECTION reeet aneian AME M KEEA AKRA ahaaa aasa aa aaa eaaa Naaa ta 36 4 5 1 Physical connectlon a oeii ie f A en 36 4 5 2 Software configuration titi f b l 37 sw Chiller Scroll 1 01 3 Scroll Manual 1 14 5 ADDRESS SETTINGS ii i e Eana Na anaana aana aa iradad a Danada aan iNES 37 51 SETTING THE DISPLAY ADDRESS r r ien eb pr ua ee rabt e ir Swan 37 5 2 SETTING THE PCO ADDRESS PCOXS OR PCO1 nanna nanna 38 5 3 MICROPROCESSOR DISPLAY CONFIGURATION sese 38 6 SCREENS iii i d cinismo 39 Gili MAIN pices atada ii died 39 6 22 CHILLER STATUS in inier b e ba etta 39 6 2 1 Ghiller Status R le miis 39 6 2 2 Chiller Status Val criada idilio 41 6 2 3 Ghiller Status LAN kihate a erani ue arae a Pre debi 41 6 3 INPUTS OUTPUTS MENU iii iones aida ta fm 41 6 3 1 Inputs Outputs Menu L O Status 20 2 nanna anna 41 6 3 2 Inputs Outputs Menu I O Override nn nanna 42 6 4 SETPOINT MENU cionado A ta da Tata 42 6 55 MAINTENANCE MENU a ia ata pe A Ba lat 42 6 5 1 Rurnin
83. ling sw Chiller Scroll 1 01 79 Scroll Manual 1 14 Configuration of Valve Parameters From the Manufacturer s menu Carel EXV Drivers it is necessary to configure e Main Parameters o Steps in Stand by o Sensor working range o Alarm Delay Times e Autosetup Parameters o percentage of opening at start up o type of compressors and capacity control o type of evaporator o saturation temperature thresholds o alarm thresholds Advanced parameters are also present for custom configuration of driver functions in the 3 possible operating modes o Chiller o Pump o Defrost Valve Management The valve operating status can be viewed in the Chiller Status menu Elect Valve d inoutl di do o DRIVER 1 B1 l i l l ina IGas R407c gt Type of refrigerant used in the unit Current operating mode of cooling circuit ego cool EEV AUTO Type of control of the EVDriver A rren 0000 automatic PID control Number of opening steps the valve must reach Power request 000 E manual circhi cooling capacity 4 DRIVER 1 B2 ISuperHeat 000 0 C Current superheat value Reading of superheat temperature Suction T 000 0 C sensor Evap temp 000 0 C Evaporation saturation temperature calculated Evaporation pressure lt Evap press 00 0 bargl from the evaporation pressure Cond temp 000 0 C i 4 Condensation temperatur
84. n Par Description Default Range UOM Maintenance 1 Enable D IN from keyboard no no yes M1 2__ Enable A IN from keyboard no no yes 3 Enable D OUT from keyboard no no yes 4 Enable A OUT from keyboard no no yes M4 1 EEV mode circuit 1 auto auto man 2 Steps demanded of EEV circuit 1 250 0 M6 1 EEV mode circuit 2 auto auto man 2 Steps demanded of EEV circuit 2 250 0 7 3 2 Maintenance Running hours Screen Par Description Default Range UOM Maintenance P1 1 Enable alarm to signal when compressors exceed run time threshold yes no yes sw Chiller Scroll 1 01 45 Scroll Manual 1 14 2 Compressor run time threshold 10 000 1000 999 000 h Pb 1 Enable alarm to signal when pumps exceed run time threshold yes no yes 2 Pump run time threshold 10 000 1000 999 000 h 7 3 3 Maintenance Parameters Screen Par Description Default Range UOM Maintenance 1 Offset sensor B1 pCOXS 0 0 9 9 9 9 N1 2 Offset sensor B2 pCOXS 0 0 9 9 9 9 3 Offset sensor B3 pCOXS 0 0 9 9 9 9 4 Offset sensor B4 pCOXS 0 0 9 9 9 9 1 Offset sensor B1 pCO1 0 0 9 9 9 9 2__ Offset sensor B2 pCO1 0 0 9 9 9 9 3 Offset sensor B3 pCO1 0 0 9 9 9 9 N2 4 Offset sensor B4 pCO1 0 0 9 9
85. ned so that they match those of the connected displays The display mode can be o Private if the display terminal is defined as private it can communicate with only one microprocessor o Shared if the display terminal is shared in the case of units connected in a LAN it can communicate with a number of microprocessors in this case you can switch from one to another by keeping the ESC key pressed and repeatedly pressing the DOWN key e To confirm the changes change the parameter near Ok to YES sw Chiller Scroll 1 01 38 Scroll Manual 1 14 6 SCREENS The main information screens of the application divided into the different menus are shown below Appearing in the top right hand corner is a code identifying the individual screen except the Main menu screens 6 1 MAIN main TA Main screen that shows the inlet water temperature outlet water temperature average in units with 2 evaporators unit status and an IN 12 0 C p a poran y active components indicated by means of icons OUT 12 5 C A pump 1 B pump 2 compressors with an indication of how many are running TE heating elements main_2 A eer a ree A i i it 4 Za A Main readings relative to circuit 1 Inlet water temperature IWater IN 00 0 C l Outlet water temperature Water OUT 00 0 C i c ICond press 00 0 bar Condensation Pressure or Evaporation in heat pump models ICond temp 00 0 C Equiv
86. ng Heating for the Master unit For the other units the operating mode will be displayed but it will not be possible to change it since all units will work according to the mode set on the Master unit If the Master unit is turned on at a later time and in the meanwhile has been switched to a different mode than that applied up to that time across the system this will automatically cause the other units to go into a temporary standby status after which they will be switched on again with the new operating mode selected An indication of the mode transmitted by the Master unit to the Slave units can be found in the Chiller Status menu LAN G3 sw Chiller Scroll 1 01 75 Scroll Manual 1 14 t_sm_lan_03 Running mode active for LAN 10 2 6 Shared Display Terminal In addition to correctly configuring the pLAN address in order to assure correct use of the shared display terminal it is necessary to set the latter as Shared in each chiller making up the LAN see 5 3 The physical connection can be made as when connecting a simple remote terminal to one of the chillers in the network From the shared terminal you can access the different chillers by keeping the ESC key pressed down and repeatedly pressing the do key If a chiller goes into an alarm status the shared terminal will automatically display the parameters of that specific unit 11 ADVANCED OPTIONS 11 1 LOW LOAD LOGIC Manufacturer s menu Parameters Tw Tx
87. nit e pump in alarm status Unit switched off If the unit is switched off the time count will also be interrupted Rotation ______ time Uni On mm KN M nit Off On A Pumpl non Off L A 4 ieee eee aa 1 Pump2 on Off i l Figure 13 Pump Rotation with Unit Off sw Chiller Scroll 1 01 19 Scroll Manual 1 14 Pump alarm In the event that the currently active pump goes into an alarm status the second pump will be automatically switched on until the first one is fixed Once the alarm has been cleared the pump that had not completed its turn will start up again and repeat the entire cycle Rotation Pumpi _ ii es time Override Pump2 e e e Figure 14 Pump Rotation with Alarm 1 In cases where it is instead the non active pump that gives an alarm signal the first pump will keep running until the alarm is cleared Once normal operating conditions have been restored rotation will proceed normally Rotation Pump1 OA a id e ia time Override Pump2 Alarm Pump Figure 15 Pump Rotation with Alarm 2 If the chiller switches off due to both pumps being in an alarm status once normal operating conditions are restored the pump that will start up first will be the one determined by the Sequence parameter User menu Setpoints and Parameters Ha which in the case of manual rotation defines the pump to be used t_user_set_10 PUMPS Ha Rotation man Per
88. no yes 1 Enable pump thermal alarm yes no yes U6 2 Pump thermal alarm reset man auto man 2 Pump thermal alarm delay 0 0 999 S 1__ Enable flow alarm yes no yes U7 2 Flow alarm reset man auto man 2 Flow alarm delay at start up 20 0 999 S 4 Flow alarm delay during operation 5 0 999 S 1 Enable high pressure alarm by pressure switch yes no yes U9 2 High pressure alarm reset man auto man 3 High pressure alarm delay 0 0 999 S 1 Enable low pressure alarm by pressure switch yes no yes Ua 2 Low pressure alarm reset man auto man 3 Low pressure alarm delay at start up 120 0 999 S 4 Low pressure alarm delay during operation 120 0 999 S UD 1 Disable low pressure alarm in heat pump mode no no yes Uc 1 Delay time of a second manually reset low pressure alarm 60 0 540 min 2 Enable second manually reset low pressure alarm no no yes 1 Enable high pressure alarm triggered by sensor yes no yes 2 Sensor triggered high pressure alarm reset man auto man Ud 2 Sensor triggered high pressure alarm setpoint 27 5 0 0 99 9 bars 4 Sensor triggered high pressure alarm differential 2 0 0 0 99 9 bars 5 Sensor triggered high pressure alarm delay 1 1 999 s 1 High pressure alarm prevention yes no yes Ue 2 High pressure alarm prevention setpoint 26 5 0 0 99 9 bars 3 High pressure alarm prevention diff 5 0 0 0 99 9 bars 4 High pressure alarm prevention delay 0 0 999 S Uf 1 Attempts to prevent high pressure alarm with
89. nt of the fan modulation ramp o max the sum of this parameter and the setpoint indicates determines the end point of the fan modulation ramp o min and max can be defined as negative values to control a modulation ramp that operates below the setpoint the default values are in fact min 5 max 39 o fan control expressed as a percentage refers to the actual operating range which will depend on the characteristics of the motor 2 10 3 Combined operation mechanical cooling freecooling If the freecooling function does not suffice on its own to achieve the desired water temperatures the unit will go into a combined operating mode where the mechanical cooling system will step in Compressors will be switched on based on the inlet water temperature using proportional or proportional integral control In units with two or more steps per circuit during combined operation the steps will be disabled and the system will only operate at full capacity In dual circuit units the balanced start up mode will also be disabled During combined operation the fan speed will again be controlled by the condensation logic 2 10 4 Condensation coil capacity control Manufacturer s menu Parameters Tq In conditions of combined operation in order to maintain the condensation temperature at a sufficient level Tcond 40 the heat exchange area is reduced by reduc ing the capacity of the condensation coils 2 10 5 Capacity reducing ov
90. ntegral time condensation temp 0 0 25 5 S Vn 1 Percentage of opening at start up 60 0 100 sw Chiller Scroll 1 01 49 Scroll Manual 1 14 Vo Compressors SCREW Not Selected RECIPROCATING SCREW SCROLL CABINET FLOODED CABINET Capacity control NO STEPS Not selected NO STEPS SLOW CONTINUOUS FAST CONTINUOUS Vp Evaporator in cooling mode PLATES Not Selected PLATES TUBE BUNDLE FINS FAST FINS SLOW Evaporator in heating mode FINS FAST Not Selected PLATES TUBE BUNDLE FINS FAST FINS SLOW Vq Min saturation temp in cooling mode 2 0 70 0 50 0 Min saturation temp in heating mode 18 0 70 0 50 0 Min saturation temp in defrost mode 30 0 70 0 50 0 Vr Max saturation temp in cooling mode 12 0 50 0 90 0 Max saturation temp in heating mode 12 0 50 0 90 0 Max saturation temp in defrost mode 15 0 50 0 90 0 Vs W N wN High superheat alarm threshold 0 0 1000 3 C3 C3 C3 C3 C3 3 sw Chiller Scroll 1 01 50 Scroll Manual 1 14 8 CONTROL SYSTEM ARCHITECTURE 8 1 MICROPROCESSOR LAYOUT 8 1 1 pCO1 Description of connectors 1 2 3 a 11 12 13 14 15 16 17 power supply connection G GO 2A slow blow fuse 250 Vac T2 A NTC universal analog inputs
91. nual 1 14 e Rotation with Stand by MASTER pLAN 1 Unlike the standard rotation mode rotation with standby provides for one of the chillers controlled by the LAN logic to be placed on standby by the Master This status implies that both compressors and pump will be switched off If the Master unit is the one on standby the inlet water temperature used to govern the system will be computed as the average value of the other units 10 1 3 LAN dynamics The Master constantly monitors the LAN to adapt the control functions to changes in the number of available units If a chiller is disconnected from the LAN due to e an interruption in the serial connection e switching off of the unit by means of the keys e disabling of the LAN logic e a serious alarm the Master will re compute the number of compressors to be switched on based on the control band and the number of compressors available If a serious alarm has caused the unit to be cut off from the LAN and placed back in a stand alone status the Master will disable the rotation with stand by logic if this option was selected and switch to a standard rotation logic The Master unit continues to perform its control function for the entire system unless it is physically disconnected or the LAN logic is disabled In such cases the other units will likewise resume operation on a stand alone basis o d MASTER Ra a MASTER 10 25 YSTEM CONFIGURATION The steps to be carried
92. ompressor 2 Compressors 2 Compressors 4 Compressors triggered by pressure sw Chiller Scroll 1 01 triggered by pressure 56 J2 1 B1 ON Condensation Pressure Condensation Pressure Gongensation Pressure Condensation Pressure 0 5V circ 1 circ 1 4 20 mA Condensation Pressure Condensation Pressure J2 2 B2 S 4 0 5V circ 2 circ 2 4 20 mA Remote setpoint Remote setpoint Remote setpoint Remote setpoint J2 3 B3 E NTC adjustment Outdoor air adjustment Outdoor air adjustment Outdoor air adjustment Outdoor air temperature temperature temperature temperature Evaporator inlet water Evaporator inlet water Evaporator inlet water Evaporator inlet water J3 3 B4 NTC temperature temperature temperature temperature Evaporator outlet water Evaporator outlet water Evaporator 1 outlet water Evaporator 1 outlet water J3 1 B5 NTC temperature temperature temperature temperature J3 3 B6 NTC fa T Evaporator 2 outlet water Evaporator 2 outlet water temperature temperature Condenser water Condenser water Condenser water Condenser water J6 1 B7 NTC temperature temperature temperature temperature J6 3 B8 NTC Ez T Condenser water Condenser water temperature temperature Analog output J4 3 Y1 0 10 V J4 4 Y2 0 10 V J4 5 Y3 PWM J4 6 Y4 PWM Digital input High pressure alarm High pressure alarm High pressure alarm High pressu
93. ompressor operation but will terminate any defrost cycle underway Outdoor Temperature Sensor disables Freecooling setpoint compensation and compressor inhibition based on outdoor temperature Freecooling Temperature Sensor disables the Freecooling mode Setpoint Adjustment Sensor disables setpoint adjustment via analog input Water Temperature Sensor Condenser 1 W W units if there is only one condenser or if the other sensor has also signalled an alarm it will inhibit operation of the heating element Water Temperature Sensor Condenser 2 W W units if the sensor of the first condenser has likewise signalled an alarm it will inhibit operation of the heating element From Manufacturer s menu Alarms gt U1 U3 it is possible to enable the alarms of individual sensors and define a trip delay time 3 1 3 High Pressure Alarm from Digital Input High Pressure Alarm circuit 1 Input DIN3 pCO XS DIN1 pCO1 Present always Active while unit is on Effect stops the compressors of circuit 1 High Pressure Alarm circuit 2 Input DIN2 pCO1 Present with pCO1 controller Active while unit is on Effect stops the compressors of circuit 2 Configuration Manufacturer s menu Alarms U9 Enable yes no Reset automatic manual Delay 0 999 s sw Chiller Scroll 1 01 28 Scroll Manual 1 14 3 1 4 Low Pressure Alarm from Digital Input Low Pressure Alarm circuit 1 Input DIN4 pCO XS DIN3 pCO1 Present
94. on Options In addition to the condensation logics described above it is possible to switch on the fans via an override function 2 6 1 4 Override function for activating Fans when Compressors are switched On Manufacturer s menu Parameters T6 At compressor start up it is possible to choose between o No override the fans will be controlled by the selected condensation logic o Speed UP irrespective of the pressure the fans will be switched on at compressor start up The parameters that may be set under this logic are e Duration time of fan operation e Fan speed level of fan operation with On Off control this value will be equal to 100 o In advance irrespective of the pressure the fans will be switched on preceding and momentarily inhibiting the start up of the compressors The parameters that may be set under this logic are e Duration time of fan operation e Fan speed level of fan operation with On Off control this value will be equal to 100 2 6 1 5 Override function for activating Fans when an Alarm occurs Manufacturer s menu Parameters 7 T7 Only in the case of modulating condensation control will it be possible to choose the level of operation of the fans in the event of alarms generated by failure of the pressure sensor t_costr_par_7 CONDENSATION T7 CONTROL Condensation fans loverride level jon alarm 000 0 2 6 2 Evaporation Control In the case of Heat Pumps it is also possible to customis
95. ones Four different time zones are present User menu Clock L2 two are configurable and can be used to define the logic of the different days of the week o Time zone 1 F1 it defines 2 unit on off intervals over a 24 hour period m_clock_2 ON OFF TIME ZONES L2 Time Zone 1 ON 00 00 OFF 00 00 ON 00 00 OFF 00 00 o Time zone 2 F2 it defines one unit on off interval over a 24 hour period sw Chiller Scroll 1 01 12 Scroll Manual 1 14 m_clock_2 Time Zone 2 ON 00 00 OFF 00 00 o Time zone 3 F3 unit always on o Time zone 4 F4 unit always off Weekly programming Once the On Off time zones have been defined they must be used to define the logic to be adopted on different days of the week User menu Clock L3 Time Zones L3 Selection Mon Fl Tue F1 Wed Fl Thu Fl Fri Fl Sat Fl Sun F1 NB The On Off by time zones option is only a means of enabling or disabling operation this means that the unit will switch on only if all the active On Off options User menu LAN and Supervision similarly enable operation 2 3 2 Inhibition of compressor operation based on outdoor temperature Manufacturer s menu Parameters Tz When a temperature sensor is installed it is possible to enable a function for monitoring outdoor temperature so as to prevent compressor start up during operation in the heat pump mode In parti
96. or each cooling circuit AN nm 1111 a tL III 1 Two different types of drivers can be used based on the connection with the electronic controller each involves a specific hardware configuration A detailed description of the two solutions is provided below sw Chiller Scroll 1 01 77 Scroll Manual 1 14 11 3 1 EVD 400 tLAN 11 3 1 1 Address setting The drivers must be configured with a specific tLAN address Driver Address Driver for circuit 1 1 Driver for circuit 2 2 the address can be configured using the EDV4 Ul address application after connecting the PC to the driver The connection is made by means of a suitable converter OVSTDUTTLO convertitore Alternatively the driver can be configured using a programming key NB since the tLAN connection is independent of the pLAN connection even in the case of chillers linked together in a network the driver addresses of individual chillers will always be the same this does not apply in the case of EVD in pLAN 11 3 1 2 Phvsical Connection Figure 32Connection between EVD400 and pCO1 Whereas a tLAN connector J8 is alreadv present for pCOXS controllers M pCO built in terminal in the case of pCO1 controllers it is necessary to install a specific tLAN serial card to be used for the connection to the EVD400 sw Chiller Scroll 1 01 78 Scroll Manual 1 14 NS 11 3 2 EVD 400 pLAN 11 3 2 1 Address set
97. or 2 Compressors 2 Compressors 4 Compressors Analog input sw Chiller Scroll 1 01 54 J2 1 B1 miedo Condensation Pressure Condensation Pressure Condens allan a E Sua 0 5V circ 1 circ 1 4 20 mA Condensation Pressure Condensation Pressure J2 2 B2 f 0 5V circ 2 circ 2 4 20 mA Remote setpoint Remote setpoint Remote setpoint Remote setpoint J2 3 B3 NTC adjustment Outdoor air adjustment Outdoor air adjustment Outdoor air adjustment Outdoor air temperature temperature temperature temperature Evaporator inlet water Evaporator inlet water Evaporator inlet water Evaporator inlet water J3 3 B4 NTC temperature temperature temperature temperature Evaporator outlet water Evaporator outlet water Evaporator 1 outlet water Evaporator 1 outlet water J3 1 B5 NTC temperature temperature temperature temperature J3 3 B6 NTC a Evaporator 2 outlet water Evaporator 2 outlet water temperature temperature Condenser water Condenser water Condenser water Condenser water J6 1 B7 NTC temperature temperature temperature temperature J6 3 B8 NTC ha b Condenser water Condenser water temperature temperature Analog output J4 3 Y1 0 10 V J4 4 Y2 0 10 V J4 5 Y3 PWM J4 6 Y4 PWM Digital input High pressure alarm High pressure alarm High pressure alarm High pressure alarm J5 1 ID1 24 Vac
98. out to set up the system correctly according to the LAN logic are as follows 1 Setthe addresses of the various units connected to the LAN 2 Physically connect the units together 3 Enable and configure the LAN logic in the various units 4 Switch on the units concerned Each individual step will be analysed in depth here below sw Chiller Scroll 1 01 72 Scroll Manual 1 14 10 2 1 Address Settings In order to define a LAN network you must set the addresses of the elements making it up The maximum logic is defined as the case of 4 interconnected units plus a shared remote display terminal below we provide a table of reference for assigning the respective addresses List of Addresses pCO address Display Terminal Address Unit 1 1 25 Unit 2 2 26 Unit 3 3 27 Unit 4 4 28 Shared displav 32 Table 1 LAN addresses Example1 Description 2 units with 2 private displays e pCO of unit 1 P 01 Adr Priv Shared Trml 25 Pr ITrm2 None Trm3 None Ok No e pCO of unit 2 IP 02 Adr Priv Shared Trml 26 Pr Trm2 None Trm3 None Ok No Example 2 Description 2 units with 1 private display each and a shared display terminal e pCO of unit 1 IP 01 Adr Priv Shared Trml 25 Pr ITrm2 32 Sh Trm3 None Ok No
99. p Rotation auto man auto Ha 2 Rotation Period 6 0 999 h9 3 Pump Sequence pump 1 pump 1 pump 2 Hb 1 Compressor Rotation FIFO LIFO FIFO 2 Circuit Rotation balanced non bal balanced He 1 Freecooling Enabling Delta 3 2 0 9 9 C 2 Freecooling Enabling Differential 2 1 0 3 0 C Hf 1 Type of fan control in FC proportional saclay T 2 Integral Time 600 0 9999 S Hg 1 Deviation from setpoint for min fan speed in FC 5 8 0 Hg 2 C 2 Deviation from setpoint for max fan speed in FC 3 Hg 1 2 0 C sw Chiller Scroll 1 01 44 Scroll Manual 1 14 Hh 1 Cooling icon configuration snowflake snowflake sun Hi 1 User Password 100 0 9999 2 Duration of Login w Password 5 0 480 7 2 2 User LAN and Supervision Screen Par Description Default Range UOM User 1 Enable On Off from keyboard yes no yes y 2 Enable On Off by remote contact yes no yes 2 Enable On Off via supervisor no no yes 4 Enable On Off by time zones no no yes J2 1 Enable summer winter changeover via remote contact yes no yes 2 Enable summer winter changeover via supervisor no no yes 1 Enable LAN logic no no yes J3 ee Cascade Step 2 Unit On Off logic in LAN C
100. r Scroll 1 01 Compressor status Indication of whether high pressure prevention function is active in the circuit Pump status Antifreeze heating element output status Fan status and percentage of operating capacity used where applicable in the case of Heat Pump units 4 way valve status NB 4 way valve logic config in Manufacturer s menu Parameters Tc in the case of Freecooling units 3 way valve status in the case of Freecooling units Status of capacity control solenoid valve in the case of GSM supervision protocol Modem status 40 Scroll Manual 1 14 6 2 2 Chiller Status Valve DRIVER 1 Bl Gas L 17 Mode Cool EEV AUTO Valve position 0000 Power request 000 4 d inout2 di DRIVER 1 B2 ISuperHeat 000 0 C Suction T 000 0 C Evap temp 000 0 C Evap press 00 0barg Cond temp 000 0 C 4 d inoutd di Saa ee ee DRIVER 1 B31 PROTECTION LowSH No HtCond No ILOP No MOP No A a DRIVERS B7 Drvl Version 000 000 Drv2 Version 000 000 Electronic Valve Status Electronic valve driver versions 6 2 3 Chiller Status LAN t_sm_lan_01 PLAN C1 IUnit 1 0n Line Alone Unit 2 0ff Line Unit 3 0ff Line Unit 4 0ff Line Ho Reference T IN for control logic 00 0 C Running mode la
101. re e setpoint bars e differential bars e delay time s The function consists in inhibiting the operation of one compressor in the circuit concerned in order to prevent the unit from running at full capacity The compressor inhibited changes each time the prevention function is activated When the condensation pressure exceeds the activation value setpoint this logic is used until the pressure falls below the deactivation value setpoint differential Prevention of High Pressure Alarm Active Not Active Pressure setp diff set A delay time is set to prevent the logic from being activated in cases where the pressure falls below the deactivation threshold before the set time has elapsed In the case of a single compressor circuit it is also necessary to configure the number of prevention attempts that must be made before the function itself is disabled Manufacturer s menu Alarms Uf This is because inhibiting the operation of the sole compressor will have the effect of switching off and on the entire circuit though the fans will continue to run according to their control logic for conditions under pressure The number of attempts will be reset as soon as the compressor is switched off under normal chiller control conditions indicating that correct operation has resumed 11 3 ELECTRONIC VALVE To each unit it is possible to connect internally up to 2 EVD400 drivers for controlling the electronic valves one f
102. re alarm J5 1 ID1 24 Vac Vdc triggered by pressure triggered by pressure triggered by pressure triggered by pressure sensor sensor sensor circ 1 sensor circ 1 High pressure alarm High pressure alarm J5 2 ID2 24 Vac Vdc triggered by pressure triggered by pressure sensor circ 2 sensor circ 2 J5 3 ID3 24 Vac Vde Low pressure alarm Low pressure alarm High pressure alarm High pressure alarm triggered by pressure triggered by pressure Scroll Manual 1 14 sensor sensor sensor Circ 1 sensor circ 1 High pressure alarm High pressure alarm J5 4 ID4 24 Vac Vdc gt triggered by pressure triggered by pressure sensor circ 2 sensor Circ 2 J5 5 ID5 24 Vac Vde EE a thermal i thermal Cie OS J5 6 ID6 24 Vac Vde E spa le GN O J5 7 ID7 24 Vac Vdc Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 Thermal alarm pump 1 J5 8 ID8 24 Vac Vdc Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 Thermal alarm pump 2 J7 1 ID9 124 Vac Vdc Water flow switch alarm Water flow switch alarm Water flow switch alarm Water flow switch alarm J7 2 ID10 24 Vac Vde J7 3 ID11 24 Vac Vdc Phase direction alarm Phase direction alarm Phase direction alarm Phase direction alarm J7 4 ID12 24 Vac Vde Remote On Off Remote On Off Remote On Off Remote On Off es bei ee ee ee J8 4 ID14 2
103. rm Series 1 G AL 024 Fan Thermal Alarm Series 2 G AL 025 Maintenance Threshold Exceeded Pump 1 Ni AL 026 Maintenance Threshold Exceeded Pump 2 Ni AL 027 Phase Direction Alarm G AL 028 Antifreeze Alarm Evaporator 1 G AL 029 Antifreeze Alarm Evaporator 2 G AL 030 Maintenance Threshold Exceeded Compr 1 Ni AL 031 Maintenance Threshold Exceeded Compr 2 N1 AL 032 Maintenance Threshold Exceeded Compr 3 N1 AL 033 Maintenance Threshold Exceeded Compr 4 N1 AL 034 Maintenance Threshold Exceeded Compr 5 N1 AL 035 Maintenance Threshold Exceeded Compr 6 N1 AL 036 Maintenance Threshold Exceeded Compr 7 NT AL 037 Maintenance Threshold Exceeded Compr 8 N1 AL 038 Clock Malfunction NT AL 039 Freecooling Fault N1 AL 040 i AL 041 EPROM Error Drvi G AL 042 EPROM Error Drv2 G AL 043 Motor Error EEV1 G AL 044 Motor Error EEV2 G AL 045 Timeout MOP Drv1 N1 AL 046 Timeout MOP Drv2 NT AL 047 Timeout LOP Drv1 N1 AL 048 Timeout LOP Drv2 NT AL 049 Low SuperHeat Drv1 N1 AL 050 Low SuperHeat Drv2 N1 AL 051 Valve not closed during power OFF Drv1 NT AL 052 Valve not closed during power OFF Drv2 N1 AL 053 High SuperHeat Drv1 N1 AL 054 High SuperHeat Drv2 N1 AL 055 Error sensor S1 Drv1 G AL 056 Error sensor S1 Drv2 G AL 057 Error sensor S2 Drv1 G AL 058 Error sensor S2 Drv2 G AL 059 Error sensor S3 Drv1 G AL 060 Error sensor S3 Drv2 G AL 061 GoAhead Required Drv1 N1 AL 062 GoAhead Required
104. s noted previously these logics can be activated independently of each other In the event that both the Post Ventilation and Compressors OFF options are selected for the Final Override phase they will be activated simultaneously once the main phase has terminated It is important not to set a longer Post Ventilation than Compressors OFF time otherwise when the Compressors OFF time has elapsed the reversing valve override will cease to have effect and the valve will go back into the standard defrost status during the remaining time while the fans are running sw Chiller Scroll 1 01 23 Scroll Manual 1 14 Compressors OFF phase main phase Figure 24 Logic resulting after overrides WRONG config Compressor restart times A complete defrost cycle may entail several compressor restart phases especially when the override controls are enabled which cannot be managed according to normal compressor times For this reason the possibility of defining a specific compressor start up delay time has been introduced Manufacturer s menu Parameters Tj 2 9 4 Defrost Management Manufacturer s menu Parameters gt Td In the case of a dual circuit unit it is possible to use two different types of defrost cycles 2 9 4 1 Simultaneous defrosting It is sufficient for only one of the circuits to require defrosting both will automatically start a defrost cycle the first circuit to complete the main phase either because
105. signal their activation at 100 capacity will bring the respective output to the maximum operating voltage Fan 100 differential 0 Pressure setp setp rdiff Figure 9 Condensation Ctrl On Off In the case of the pCO1 microprocessor the logic also manages a digital signal for enabling each series of fans NO9 NO12 this output will be active every time the fan is switched to 100 2 6 1 2 Modulating Control Manufacturer s menu Parameters T5 Configuration Parameters o setpoint o differential Fan output Max2 o a 100 Max 1 Min _ 0 Pressure setp setp diff Figure 10 Modulation with 0 10V output Based on the condensation pressure the fan will be controlled via a modulating signal as soon as an operating Capacity above 0 is demanded in this case it will be made to operate at the minimum of its operating range In cases where the fans are controlled via a 0 10V output if Max1 and Max2 take on a different value when the setpoint differential values are reached there will be a step in the control value equal to the difference between the two parameters see ex Figure 10 sw Chiller Scroll 1 01 17 Scroll Manual 1 14 With the pCO1 microprocessor the logic that manages the additional digital enabling signal NO9 NO12 will activate this output in the following cases o modulating control active with compressors running o fans switched on via override 2 6 1 3 Condensati
106. single compressor circuit 3 1 99 Ug 1 Enable low pressure alarm triggered by sensor no no yes 2 Sensor triggered low pressure alarm reset man auto man 2 Sensor triggered low pressure alarm setpoint 1 0 0 0 99 9 bars 4 Sensor triggered low pressure alarm differential 2 0 0 0 99 9 bars 5 Low pressure alarm delay at start up 60 0 999 S sw Chiller Scroll 1 01 48 Scroll Manual 1 14 6 Low pressure alarm delay during operation 0 0 999 S 1 Enable compressor thermal alarm yes no yes Uh 2 Compressor thermal alarm reset man auto man 3 Compressor thermal alarm delay at start up 10 0 999 S 4 Compressor thermal alarm delay during operation 10 0 999 S 1 Enable fan thermal alarm yes no yes Ui 2 Fan thermal alarm reset man auto man 3 Fan thermal alarm delay 0 0 999 S 1 Enable antifreeze alarm yes no yes 2__ Antifreeze alarm reset man auto man Uj 3 Antifreeze alarm setpoint 4 0 99 9 99 9 C 4 Antifreeze alarm differential 1 0 0 0 99 9 C 5__ Antifreeze alarm delay 0 0 999 S Uk 1 Enable phase direction alarm yes no yes 1 Enable Freecooling fault alarm no no yes Um 2 Freecooling fault alarm reset auto auto man 3 Freecooling fault alarm delay 300 240 60
107. sor Type NTC P rat ia 2 PID Control direct direct reverse Yes 1 Valve Type eh L 2 Coil Enabled no no yes 7 4 2 Manufacturer Parameters Screen Par Description Default Range UOM Manufacturer TI 1 Minimum compressor off time 360 0 9999 S 2 Minimum compressor on time 60 0 9999 S T2 1 Time lapse between start up of different compressors 120 0 9999 S 2 Time lapse between two start ups of same compressor 450 0 9999 S 1 Enable antifreeze heating element no no yes T3 2__ Antifreeze heating element control setpoint 6 0 99 9 99 9 3 Antifreeze heating element control differential 1 0 99 9 99 9 T4 1 Enable D In filter no no yes 2 Filter delay time 5 0 9 S T5 1 Condensation Control Setpoint 11 0 0 0 30 0 bars 2 Condensation Control Differential 10 0 0 0 20 0 bars 1 Condensation Fans On Override none none in advance T6 l speed up 2 Condensation Duration of Override 10 0 999 S 2 1 Condensation Override Speed 80 0 0 0 100 0 T7 1 Condensation Speed Alarm 100 0 0 0 100 0 18 1 Evaporation Control Setpoint 9 0 0 0 45 0 bars 2 Evaporation Control Differential 4 0 0 0 45 0 bars 1 Evaporation Fans On Override none none MN Advance T9 speed up 2 Evaporation Duration of Override 10 0 999 S 2 Evaporation Override Speed 80 0 0 0 100 0 Ta 1 Evaporation Speed Alarm 100 0 0 0 100 0 Tb 1 Advance delay in pump on off switching 20 0 999 S i energised 1 C
108. t Active setpoint 10 C Inlet water temperature 9 2 C Evaporator 1 outlet temperature 7 5 C Evaporator 2 not present Circuit 1 pressure 15 2bars Circuit 2 pressure 14 7bars 9 4 3 Main Parameters Message By sending a specific message to the unit installed with a modem it is possible to receive information about the parameters set on the Master unit and which can be edited via GSM The information given in this message is ES o Setpoints o Differentials Text of SMS message Cool Setp 01 5 C Heat Setp 40 0 C Cool Diff 04 0 C Heat Diff 03 0 C 2ndCool Setp 15 0 C 2ndHeat Setp 30 0 C Meaning Cooling Setpoint 1 50 Heating Setpoint 40 Heat Pumps only Cooling Differential 4 C Heating Differential 3C Heat Pumps only Secondary Cooling Setpoint 15 Secondary Heating Setpoint 30 Heat Pumps only 9 4 4 Parameter Configuration Message By sending correctly formatted SMS messages to the unit installed with a modem the formatting procedure will be illustrated below it is possible to set several chiller control parameters or activate the transmission of information The table below shows the variables concerned along with the type and address Type Address Description D 1 On Off via Supervisor D 2 Summer Winter changeover via Supervisor D 50 request sending of message on status of selected unit D 51 request sending of message with parameters via GSM A
109. t gt Figure 6 Delay time between two consecutive start ups 2 5 6 Circuit Rotation User menu Setpoints and Parameters In addition to the logic whereby compressors are operated in turn it is also possible in the case of two circuits to select how start up demands will be distributed The possible logics are s Balanced Rotation compressor ON commands will be transmitted in turn to one circuit and then the other e Unbalanced Rotation the required compressor capacity will be drawn first using all the resources of one circuit before switching over to the other EX Balanced rotation with 2 circuits comprising 2 compressors each The ON sequence of the 4 compressors will be 1 Compr 1 circuit 1 2 Compr 1 circuit 2 3 Compr 2 circuit 1 4 Compr 2 circuit 2 sw Chiller Scroll 1 01 15 Scroll Manual 1 14 Circuit 1 Cooling capacity L L C C 190 A gt 75 7 Circuit 2 O MA HKH O Jo y C 25 AAA ltd A PA be ees 0 12 13 14 15 16 Inlet T Setpoint Setpoint differential Figure 7 Balanced Rotation EX Unbalanced Rotation with 2 circuits comprising 2 compressors each The ON sequence of the 4 compressors will be 1 Compr 1 circuit 1 2 Compr 2 circuit 1 3 Compr 1 circuit 2 4 Compr 2 circuit 2 Circuit 1 Cooling capacity BCC 109 TT a as S 75 Circuit 2 vi 50 25 0 12 13 14 15 16 Inlet T Setpo
110. th 4 compressors 100 hysteresis EX Diagram showing control logic with 4 compressors and 70 hysteresis 4 4compressors ON 4 1 1 compressor ON 3 0 4compress OFF A Differential no of 2 compressors 1 0 gt SetP SetP A SetP 2A SetP Diff inlet water T Figure 2 Control with 4 compressors 70 hysteresis sw Chiller Scroll 1 01 7 Scroll Manual 1 14 2 1 1 Hysteresis User menu Setpoints and parameters H3 The typical system with hysteresis of the capacity control steps provokes an often undesired undercooling effect during the thermal load reduction phase and at the points of variation in the capacity control steps Let us consider the following example e Unit with 2 compressors let us assume the cooling capacity of a single compressor to be equal to 2 5 C e Setpoint 12T e Differential 20 e Hysteresis 100 j Temperature of water output with progressive increases in the temp of returning water ta PRA Temperature of water output with progressive decreases in the temp of returning water ji G e Ea Capacitv control steps 12 13 14 15 Tin As mav be seen from the above diagram in the phase characterised bv increases in the thermal load and hence increases in the inlet water temperature the unit s entire capacity will be utilised at 14 with an output of water at 9C In the opposite situation i e a reduction in the thermal load at a temperature barely above 13 the hysteresis will cause t
111. ther tvpes of networks using suitable serial cards Below is a list of the possible cards and the corresponding protocols supported e BACnet on RS485 mi pCO Net e BACnet and SNTP on Ethernet network Gee pCO Web Sa e Trend ant sw Chiller Scroll 1 01 66 Scroll Manual 1 14 9 6 LIST OF VARIABLES UNDER SUPERVISION Digital Variables CAREL MODBUS DIGITAL VARIABLES TYPE R W ADDRESS ADDRESS On Off via Supervisor D R W 1 1 Sel Summer Winter changeover via Supervisor D R W 2 2 DIN High pressure from pressure switch Circ 1 D R 11 11 DIN High pressure from pressure switch Circ 2 D R 12 12 DIN Low pressure from pressure switch Circ 1 D R 13 13 DIN Low pressure from pressure switch Circ 2 D R 14 14 DIN Compressor thermal alarm Circ 1 D R 15 15 DIN Compressor thermal alarm Circ 2 D R 16 16 DIN Thermal alarm pump 1 D R 17 17 DIN Thermal alarm pump 2 D R 18 18 DIN Water flow switch alarm D R 19 19 DIN Fan alarm series 1 D R 20 20 DIN Phase direction alarm D R 21 21 On_Off via Digital Input D R 22 22 Summer Winter changeover via Input D R 23 23 DIN Configurable input D R 24 24 Compressor 1 D R 31 31 Compressor 2 D R 32 32 Compressor 3 D R 33 33 Compressor 4 D R 34 34 Compressor 5 D R 35 35 Compressor 6 D R 36 36 Compressor 7 D R 37 37 Compressor
112. ting 1 GND IL Where the pLAN connection is used both to connect the drivers to the controller and to connect anv units to be controlled via a LAN logic the EVD 400 address will depend on the address of the pCO to which the drivers are connected A reference table is provided below Addresses Address Address Address Address pCO Driver EVD1 Driver EVD2 10 Display Config via Config via Config via Fy este displa y PC fu kev PC aie y Config via display Unit 1 1 5 6 25 Unit 2 2 7 8 26 Unit 3 3 9 10 27 Unit 4 4 11 12 28 The configuration must be made using the EDV4 UI address application as for the t LAN version 11 3 2 2 Physical Connection Display LAN network cable LAN network cable cable Br s MA mmnm A A o o pCO1 Address 1 Driver 1 Driver 2 Address 5 Address 6 11 3 3 Software Management Once the driver addresses have been configured and the drivers connected to the pCO controller from the display it will be possible to configure and completely monitor the operation of the electronic valves Unit Valve Configuration From the Manufacturer s menu Unit Config Sg Si it is necessary to set e Number of Drivers installed 0 2 e Type of connection used tLAN pLAN e Type of Sensors used for control purposes s PID Control Direction Direct Reverse e Valve Type Carel Sporlan e Battery enab
113. tractable terminals provided on request on the circuit board Figure 31 as an alternative to the one used for the Carel and Modbus protocols Figure 31 LON card connector for connection to pCO terminals for connection to LonWorks GND A B service pin Green service LED Red fault warning LED NAON To activate the service pin it is sufficient to short circuit the two pins for an instant using the tip of a screwdriver or similar means Activation will be signalled by the lighting up of the service LED The service LED e signals the status of the node as per the LonWorks protocol e remains lit during activation of the service pin e remains lit for one second on receiving a WINK command from the network The fault warning LED signals the impossibility of connecting on the pCO side If the red fault warning LED lights up check whether the baud rate of the serial communication with the pCO is set on 4800 The physical connection to the LonWorks network must be made as per LonWorks instructions and specifications 9 4 GSM PROTOCOL Selecting the GSM protocol will enable the user to send and receive SMS messages to and from GSM phones thanks to the aid of aGSM Modem The following will thus be managed Alarm messages info messages concerning the unit s status info messages concerning the parameters that can be set via GSM parameter setting messages 9 4 1 Alarm Message If an alarm occurs in the Master unit or any
114. u 2 Maintenance Menu 3 User Menu The passwords can subsequently be changed respectively from 1 Manufacturer s menu Initialisation and Password W2 2 Maintenance menu Parameters N5 3 User menu Setpoints and parameters Hi The duration of access is a single parameter which for the sake of convenience has been included in all three of the screens indicated above If this value is changed from one screen the change will automaticallv be shown in the others as well 4 5 USER INTERFACE CONNECTION 4 5 1 Physical connection Local display Local display Panel mounted telephone cable pCO microprocessor o atelephone cable for the connection between pCO and Local Display sw Chiller Scroll 1 01 36 Scroll Manual 1 14 4 5 1 1 Local and remote display within 50m Local display Remote display cable Panel mounted telephone cable l IDI TCONN connector a necessary only if both a Remote displav ej local and remote display Wall mounted are present pCO microprocessor ee 5 7 pCO me o 1 T connector TCONN6 with jumpers J14 and J15 in position 1 2 o 8 telephone cables for the connections between pCO1 T connector T connector Local Display T connector Remote Displav 4 5 1 2 Local and remote remote display over 50m Remote display cable _ telephone cable i Local display Panel
115. unit connected to the LAN a message will be sent to the configured phone number The message will contain the following information e Unit in alarm status U1 U4 e Software application installed in the chiller e Inlet and outlet water temperatures or where 2 evaporators are present the average temperature as shown on the main screen e Circuit pressures e Alarm description e Alarm date and time EX Text of SMS message received V CS 1 00 D 05 07 IN 09 7C OUT 07 6C Press1 15 2bars Press2 14 9bars Alarm Unit 01 Al from Dig Input 18 36 08 03 07 Meaning Unit 1 Alarm present Alarm from Digital Input Inlet water temperature 9 7 Evaporator 1 outlet temperature 7 68 sw Chiller Scroll 1 01 62 Scroll Manual 1 14 Circuit 1 pressure 15 2bars Circuit 2 pressure 14 9bars Software version installed CS 1 00 Software date May 07 9 4 2 Unit Status Message By sending a specific message to the unit installed with a modem it is possible to receive information about a chiller connected to the LAN The information given in this message is Number of the unit queried Operating status Alarm info Active setpoint Inlet and outlet water temperatures Circuit pressures EX Text of SMS message Unit 1 Status OFF Sup No Alarm SETPOINT 10 0 C IN 09 3 C OUT1 07 5 C OUT2 C Pres 1 15 2bars Pres 2 14 7bars Meaning Information regarding unit 1 Status Off determined by supervisor No alarm presen
116. ween 30C and 40 the control setpoint is adjusted by an amount of compensation calculated on the basis of the adjustment ramp defined by the parameters themselves e g Text 328 gt compens 0 80 active setpoint 12 0 8 12 8 C With temperatures above 40 the amount of compensation will be 4 resulting in a setpoint of 12 4 16 Conditions o pCO1 outdoor temperature sensor enabled Manufacturer s menu Unit Config S9 o pCOXS analog input B2 configured as outdoor temp sensor Manufacturer s menu Unit Config S7 o summer and or winter compensation enabled User menu gt Setpoints and parameters H5 NB the setpoint obtained based on the various logics enabled will be limited according to criteria set by the user User menu Setpoints and parameters H7 H8 If this is necessary the item Bounded will be checked on the screen of the active setpoint 2 3 ON OFF ENABLING From the User menu LAN and Supervision J1 it is possible to define how the on off switching of the chiller will be controlled The options are e by means of the keyboard local or remote independently e by time zones e by remote contact e by supervisor sw Chiller Scroll 1 01 11 Scroll Manual 1 14 Since these are means for enabling operation if more than one of the options is selected all will need to be in the ON status in order for the chiller to work The main screen shows the unit s status sp
117. ycle reversing valve in heat pump energised non energised 2 ON delay in valve rotation 10 0 99 S 2 Enable ON delay no no yes 1 Defrost Logic Press Pressure threshold threshold Temp change simultane simultaneous Td 2 Defrost Mode o s separate 3 Max duration of defrost cycle 300 0 9999 S 4 Minimum time lapse between two defrost cycles 30 0 500 min 1 Pressure threshold for starting defrost cycle 2 5 99 9 99 9 bars Te 2 Pressure threshold for stopping defrost cycle 19 0 Te 1 99 9 bars 3 Defrost start delay time 120 0 9999 S Tf 1 Temperature change for starting defrost cycle 5 0 0 99 9 C 2 Pressure threshold for stopping defrost cycle 19 0 99 9 99 9 bars Tf 1 Max evap temp for starting defrost cycle 0 0 99 9 99 9 C TT 1 Delay for memorisation of max evaporation temp 180 0 999 S Tg 1 Enable compres stop when defrosting begins no no yes 2 Duration of compres stop at beginning of defrost cycle 30 2 999 S Th 1 Enable compres stop when defrosting ends no no yes 2 1 Duration of compres stop at end of defrost cycle 30 2 999 S 1 Enable fans ON at end of defrost cycle no no yes Ti 2 Fan speed at end of defrost cycle 100 0 0 0 100 0 3 Max fan run time at end of defrost cycle 30 2 999 S 4 Max pressure while fans running at end of defrost cycle 21 5 Te 2 or Tf 2 99 9 bars Tj 1 Delay compres start up during defrost cycle 5 1 999 S Tk 1__ Enable Freecooling no no yes Tm 1 Compr off time at

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