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Carel Application program for pCO3 AREA CONTROLLER FOR E

1. 8 SELECTING THE LANGUAGE 8 LIST OF INPUTS OUTPUTS 2 22 22 Er tad eer D e PIDEN MM D TM LC M T EM DENIM DU ae TEM 9 5 1 A ee A A OR 9 5 2 E OO 9 5 3 Digital Outpuls is 9 5 4 Analogue QUIDUIS rt c A O in EA E ete oe ves En dpa 9 LIST OF jac 10 TC NS ii R ER RREEen 18 7 1 Password 4 44 52 oca AAA AAA tie 18 SYSTEM CONFIGURATION ii dida 19 8 1 DICES iaa 19 8 2 Gohfiguring th Ms dl 20 8 3 Configuring A ii E EID RR R ERE RE TOU N 20 SYSTEM MANAGEMENT me 21 9 1 Water EE 21 92 eundum 22 9 3 Terminal Units AAA 22 9 4 Trend of significant values pGD3 user interface co nicnicinicnicnininnnmn tentent tentent tette ttn tentent tetto tento tte tentes tte teint 24 SETTING THE CLOCK AND THE v c R 24 10 1 IDAVIIGHESAVINGs sh aetates ta rn nist anni e Gn une anh nS an aL A LETS aan ia ena ented 24 SCHEDULER senec Ne MEN M M MD ME ME M D DAE E M NM DM LEE 25 RR 25 CHILLER OR BOILER SETPOINT COMPENSATION eren rc 28 12 1 Compensation based on the outside temperature ee e a IEE 28 12 2 Compensation based on the level of comfort essent tn
2. e Confirm by selecting YES 2 2 3 Setting the address on the PGD3 terminal To set the address on the pGD3 terminal proceed as follows e Power up the terminal e Press the Up Down ENTER buttons until the display configuration screen is displayed e Go to the Network configuration menu and enter the pLAN address in the terminal address field e f setting the address to 0 the procedure is now concluded If on the other hand the address of the terminal is being set for normal operation address 31 select the setup menu and press Enter e Set the parameters according to the following screen FOI IRR III IORI RII IRR RII II RK IK P 01 Adr Priv Shared Trmd 32 Sh Trm2 31 Sh Trm3 None OK No J FI IRR II IIR RII IIR RR I IIR RIK e Once having set the correct values confirm by selecting YES Code 030221521 Rel 1 1 of 03 09 09 6 2 3 pGD1 terminal ALARM UP PRG ENTER ESC DOWN Button Description ALARM displays the alarms mutes the buzzer and deletes the active alarms UP if the cursor is in the home position top left corner scrolls up the screens in the same group if the cursor is in a setting field increases the value DOWN if the cursor is in the home position top left corner scrolls down the screens in the same group if the cursor is
3. NO no NO NO NO Outlet 3 probe broken or disconnected Chiller hour counter alarm NO Manual Settable Boiler hour counter alarm NO No NO NO Manual Settable 17 2 Alarm log The LOG menu provides the user the log of alarm events including the type of alarm and event date To display the menu proceed as follows e press the PRG button the LED on the PRG button will come on and select the LOG menu 5 e usethe UP and DOWN buttons to scroll the list of events To delete the alarm log proceed as follows press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu enter the correct password select the RESET LOG menu 6 f d press ENTER to select the RESET LOG field and set YES press ENTER to confirm Code 030221521 Rel 1 1 of 03 09 09 37 100C90 v1 O L 181 LZSLZZOEO PPO Agency CAREL
4. ELLA DS Remote ono R 42 Remoieonof LL mune O TO B1 Out temp o 82 8olertemp C R 49 Bserememus 76 E B30uler1 0 R 49 melodetemeaus 6 E BiOuezsC A 49 line Zoulettemperatre feo E Analogue inpus G8 R 404 tine Soulettemperaue je E Code 030221521 Rel 1 1 of 03 09 09 12 B5 Outlet 3 C B6 Humidity 1 rH B7 Humidity 2 rH B8 Humidity 3 rH Digital outputs 1 4 4d4 Line 1 humidity rH 44 rH IA E A E Ep 0002 Pump 2 A EEN 5008 Pump a5 m DO04 Chiller R 4d5 Chiller Digital outputs 5 8 Boiler DO05 Boiler D006 CooingHeaing R a Congre Cd por repes posmam a m S EEE DO09 Detumid i Don Denumany R y pam EL poum Emm lE mL C CT SR ES NNNM Y1 Valve 1 96 MWez a we Wen A EEE EEE Yevanes JA vane EL Yachiersep V A e span Y 1 __ _ 5 Log MENU button for 6 button an Logged alarms no Sequence of alarms Description of alarms AL o R 5 Aamin o o 6 Service MENU button for 6 button terminal a Change language Use UP amp DOWN to select the fields in the menu and b Information then press ENTER to access the selected menu c Cooling Heating d Op hours e Config BMS f Service Par LII 6 a Change language Current
5. R 6a Press enter to change the language Disable language on initial Disable the language on the initial screen i RN RB screen Change dplay to RAW 6a2_ Change display between pGDi ara poba Yeo m Information Ver R84 Buwaewsm I A E p gt SWIOEKED R 9 Juno Bes R8 Bosw O Ban R9 Bomwsm LLL Type ofpCO R 9 TypectpCOandypectboad S 1 Todes KB R 9 rose oras A LE Ram KE A SecA BO Type bal n R 9 Typecfbuitininstaled O ELLE iuc el mi 5 5 5 5 Mel E H9 Cycle s gt ms Cycle time ms c Cooling Heating Sass R Tire sens Curmsemoy m amp ummsexm OT Set season MW Sets season ely CoomgMeaiing Cei E mu Code 030221521 Rel 1 1 of 03 09 09 13 d Op hours Pmpt n 8 9 Fercmepmi Rp o Pumz m R amp owrcomter pump A LL Paez n 8 foromo A LL Oe n A 8 Hour counter chier iure e Boe n R oe Hourcountr tole pigra iri en e Config BMS Enter maintenance R W Enter maintenance password 0 to 9999 password Pronk R We ARE Badae a CC pasare 99 o EEE AA ESA EAN f Service settings Enter maintenance R W Enter maintenance password 0 to 9999 password a Op hours 6f Use UP amp DOWN to select the fields in the menu and b Calibrati
6. Compensation in heating In heating operating mode the compensation algorithm queries all the terminal units that are operating correctly at regular intervals records the local temperature T and set point SP and then calculates the deviation for each unit S SP T Note that in heating mode the air conditioning system has the task of raising the temperature in the room and therefore can only contrast positive deviations therefore only positive deviations are considered to calculate the average value which by definition corresponds to the level of comfort LoC If the level of comfort remains above the set satisfaction threshold X the comfort conditions are not considered to be satisfying on average and consequently the output of the heating System needs to be increased The heat pump or boiler set point must therefore be increased by a certain offset Corrected set point PC Set point set t Average deviation C Example Assuming the following variables have been set Boiler outlet set point 45 C Satisfaction threshold X 2 C Offset 5 C Calculation interval 60 min Corrected set point PC 45 LoC C The area controller will query the terminal units and record the local temperature T and set point SP Assuming the situation found is as follows fan alarm SP T S T SP coil 1 19 16 3 2 19 17 2 3 19 15 4 4 A01 1
7. DOWN buttons to select the page corresponding to changeover based on the calendar IMPORTANT the page can only be displayed if the AUTO MODE changeover option has been selected 6 f c 9 press ENTER to select the desired field e usethe UP and DOWN buttons to select the desired value e press ENTER to confirm 14 Management of the dehumidification function The dehumidification algorithm distinguishes between cooling and heating operation 14 1 Dehumidification in cooling mode If the system is operating in cooling mode a set point can be defined for the relative humidity in the rooms The area controller compares this set point against the value measured by the connected humidity probes One humidity probe can be connected for each water line If the relative humidity in the rooms managed by a water line is greater than the set point all the devices connected to the line are switched to DRY mode this means the chiller set point is forced to the minimum value and the mixing valve in the water line is fully opened The controllers on the terminal units in DRY mode operate the fan at minimum value Each water line is managed independently all the devices belonging to one water line behave in the same way To set the parameters relating to the management of the dehumidification function proceed as follows press the PRG button the LED on the PRG button will come on and select the SET POINT menu use the UP and DOWN buttons to select the page
8. and then press ENTER to access the selected menu and then view the details of the selected fan coils then press ENTER to access the selected menu and then view the details of the selected fan coils 4a3 Use UP amp DOWN to select the fields in the menu and then press ENTER to access the selected menu and then view the details of the selected fan coils Um 4a4 The selected line The selected zone Adr 4a4 Zone name Rw The correct sequence of fan coils From 0 to the total The total number of fan coils number of fan coils in the The address set for the fan coils zone Wem C R 4a Temperatura oftetancon A O Pumdisu BE 4 PumdyoWeRnwi CCC Setpoint C R 424 epotoWeRnci 6 Fanmode R Operating mode ofthe fancoiandihefan i Ov R4 jew CO AU b Chiller Twedcie TAT m mese 1 S Bau PA Wess LL Wam R e jWersam BEE LLL c Boiler Borsas R e pess o LL C A do Boleroutettemperte A O Wam R e eesm 1 LLL d Area Controller Wu UT mum Tp p ID1 Pump 1 overload D2 Pump 2 overload R 4H Pump2thermaloveroad S S OS Pump 3overcad R 4a PumpSthemaloveroas CT Cd D4 CooingHeaing R 4H CooingHeaing LL Masc cp O O E 1D5 chiller aom Doteerdam R a Beam L Drapes R 4 Hupesue
9. combinations of signs that lead to different control logic as described below Compensation in cooling differential on the outside temperature AT gt 0 the algorithm increases positive compensation or reduces negative compensation the chiller set point when the outside climatic conditions exceed certain conditions Corrected set point C Max comp gt 0 Set point set Set T out C Compensation in heating differential on the outside temperature AT lt 0 the algorithm increases positive compensation or reduces negative compensation the boiler or heat pump set point when the outside climatic conditions fall below certain conditions Corrected set point C Max comp gt 0 Set point set Max comp lt 0 Set T out C Code 030221521 Rel 1 1 of 03 09 09 28 As already described to define the compensation logic proceed as follows press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password select the TEMP CONTROL menu use UP amp DOWN to select the page relating to the compensation function 6 f c 5 press ENTER to select the desired field use the UP and DOWN buttons to choose the compensation logic based on the outside temperature press ENTER to select the field relating to the offset to be applied press ENTER to confirm use the UP and DOWN buttons to select the page corresponding to the outside temperatur
10. corresponding to the relative humidity set point setting 2 d press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm 14 2 Dehumidification in heating mode If the system is operating in heating mode the dehumidification function is only allowed when the installation is fitted with an independent dehumidifier The dehumidification function must be managed manually by the user via the terminal unit user interface by selecting the DRY function This request is processed by the area controller which enables a dedicated digital output to switch the dehumidifier on or off 15 Manual management of the outputs The MANUAL menu password protected allows the user or manually control the main outputs press PRG the LED on the PRG button will come on and select the SERVICE menu select the MANUAL menu and enter the password press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm It is strongly recommended to only use this option to check the correct operation of a connected device Code 030221521 Rel 1 1 of 03 09 09 34 16 Supervisor The area controller can interface with a local or remote supervisory telemaintenance system The pCO board accessories include various optional serial communication boards for the installation of the optional serial communication boards see the pCO board installation m
11. in a setting field decreases the value ENTER used to move the cursor from the home position top left corner to the setting fields in the setting fields confirms the set value and moves to the next parameter PRG accesses the menu for selecting the group of parameters to be displayed modified access to the parameters is confirmed by pressing the Enter button ESC returns to the immediately previous menu 2 4 pGD3 terminal UP ENTER DOWN ON OFF ALARM PRG ESC Button Description ON OFF pressing for at least 3s switches the area controller on off ALARM displays the alarms mutes the buzzer and deletes the active alarms UP if the cursor is in the home position top left corner scrolls up the screens in the same group if the cursor is in a setting field increases the value DOWN if the cursor is in the home position top left corner scrolls down the screens in the same group if the cursor is in a setting field decreases the value ENTER used to move the cursor from the home position top left corner to the setting fields in the setting fields confirms the set value and moves to the next parameter PRG accesses the menu for selecting the group of parameters to be displayed modified access to the parameters is confirmed by pressing the Enter button ESC returns to the immediately previous menu 2 5 Changing the di
12. on in cooling T set point in cooling line 1 Ba ze 0 to 999 m EE une le Drez RN 287 Dehumaiy set pein cooing Tne 2 Wess 9 Ines AM ehunidfysei pointin cooing ine pose m 3 Clock Scheduler main screen for 6 button terminal Set date and time RW 3a Setthe hours and minutes 0 to 23 0 to 59 RW 3a Setthe day month year 1 to 31 1 to 12 0 to 99 Dar R rows day of he week 55 RE ae ERT EEN saving EE change to daylight saving EUA o mm o Sus RW 3b an from LAST FIRST THE LAST to FOURTH SUNDAY MONDAY to RW 3b Date and time JANUARY to iiu a 1 to 12 RW 3b Ending on DAT HAST LAST to FOURTH An MONDAY to RW 3b Date and time JANUARY to ee DEON REA 1 to 12 Scheduler num RW 3c Select the type of scheduler Fon 1 to the total number of schedulers set by the user in the MANUFACTURER menu RW 3c Select the day of the week MONDAY to SUNDAY select day ea peers EE t 8 B LE peseme oY RW 3c Zone 4 start times PreCom Eco Auto Copy to R 3c Correct copy RW Select the day ofthe week MONDAY R W to SUNDAY Yes No Code 030221521 Rel 1 1 of 03 09 09 11 4 Inputs Outputs MENU button for 6 button terminal Use UP amp DOWN to select the fields in the menu and then press ENTER to access the selected menu Use UP amp DOWN to select the fields in the menu
13. represents the fundamental brick in the development of an integrated hydronic system whose strong points involve communication between the devices and the optimisation of the resources in an HVAC system with intermediate carrier fluid The solution proposed by Carel for the control of hydronic systems can in fact maximise its features when integrating terminal units chillers and heat pumps boilers and supervisors into the same system All the devices are therefore connected in a network called the e drobus which exploits the flexibility of the pCO family programmable controllers to share and process the information available In particular the main role of the area controller is to coordinate and optimise the operation of a group of terminal units and the water circuit that supplies these as well as to process the data available and share it with the other controllers in the system and the supervisor where available The result is an installation such as the one shown in the figure on the side The flexibility of the programmable controllers and the possibility to share a large amount of data across the network allows many different system configurations to be implemented focussing on the various different aspects of the capacity available This software has been designed from the viewpoint of distributed intelligence the area controller supervises the management of independent areas and optimises its own operating parameters using algorit
14. selected changeover is managed by the supervisory system The changeover control signal is transmitted via serial communication using the variable with address 30 as follows 1 gt heating operation 0 gt cooling operation 13 4 Programmed changeover based on the calendar The area controller allows the date to be defined for changing the operating mode To do this proceed as follows e press PRG the LED on the PRG button will come on and select the SERVICE menu e select the SERVICE PAR menu and enter the password e select the TEMP CONTROL menu e usethe UP and DOWN buttons to select the page corresponding to changeover based on the calendar IMPORTANT the page can only be displayed if the AUTO MODE changeover option has been selected 6 f c 9 press ENTER to select the desired field e usethe UP and DOWN buttons to select the desired value e press ENTER to confirm Code 030221521 Rel 1 1 of 03 09 09 33 13 5 Automatic changeover The area controller allows the previous changeover mode to be integrated with the reading of the outside temperature probe therefore the changeover from one operating mode to the other will take place when after a set date the outside climate conditions are suitable The setting procedure is described below press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password select the TEMP CONTROL menu use the UP and
15. the UP and DOWN buttons to scroll the pages until reaching the screen for selecting the unit 7 c 1 press ENTER to select the desired fields use the UP and DOWN buttons to select the desired value press ENTER to confirm As in addition many parameters may take different values depending on the operating mode for example water temperature set point room set points type of compensation the season changeover automatically updates the table of parameters The changeover can be managed manually by the user or automatically by the area controller when the conditions are suitable in addition changeover can also be managed at a supervisor level The various strategies are described in a specific chapter The area controller manages the ON OFF status of the associated device based on the requests from the terminal units each terminal unit in fact based on the difference between the local temperature and its own set point and the operating mode cooling or heating sends a request for cold or hot water If there are no requests from the terminal units the circulating pumps in the water lines and the chiller or the boiler are switched off a number minimum of local requests can be set to activate the system to the procedure described in the previous chapter 9 1 In practice a minimum number of requests from the terminal units can be defined in order to activate a water line if at least one water line is active the area controller sends the signa
16. time 09 00 and OFF mode press ENTER to select field F3 set the starting time 16 00 and PRECOMF mode press ENTER to select field F4 set the starting time 18 00 and COMF mode press ENTER to select the COPY TO field and set Tuesday press ENTER to select the number of the scheduler in question and set 1 press ENTER to enable the scheduler and set YES press ENTER to select the day of the week and set Monday press ENTER repeatedly until selecting the COPY TO field and set Wednesday repeat the steps from 3 10 to 3 14 until Friday press ENTER to select the number of the scheduler in question and set 1 press ENTER to enable the scheduler and set YES press ENTER to select the day of the week and set Saturday press ENTER to select field F1 set the starting time 00 00 and ECO mode press ENTER to select field F2 set the starting time 10 00 and COMF mode press ENTER to select field F3 and set the starting time and the mode to press ENTER to select field F4 and set the starting time and the mode to press ENTER to select the COPY TO field and set Sunday press ENTER to confirm 2 for the night zone press ENTER to select the number of the scheduler in question and set 2 press ENTER to enable the scheduler and set YES press ENTER to select the day of the week and set Monday press ENTER to select field F1 set the starting time 03 00 and the PRECOMF mode press ENTER to select field F2 set the starting time 09 00 and the OFF mod
17. up the network an address must be assigned to each terminal unit connected this operation can be performed manually from the acqua user terminal or alternatively using the dipswitches on the CANbus board in the first case the dipswitches on the serial board must be set a zero The addresses must be between 21 120 inclusive Once the configuration has been completed it can be checked from a computer connected to the network via the special converter running the CANspy software For further information on these procedures see the corresponding technical documents Each terminal unit belongs to a zone which in turn is physically supplied by a water line this consideration is the basis for the logic used to assign the terminal units in this application and that therefore identifies each fan coil based on the line zone unit An example of this logic is shown in the following diagram Canbus Fanco zone 1 Fancoil zone 2 Fancoil zone 3 Fancoil zone 1 Fancoil zone 2 Ex Fancoil zone 1 EE nn Fancoil zone 3 The area controller can manage up to 3 water lines 6 zones can be defined for each water line and each zone can coordinate a maximum of 15 terminal units In total the area controller can manage up to a maximum of 100 terminal units 64 of the which can be set as master units N B Some basic concepts of master slave control logic between terminal units need to be recalled In general considering a uniform
18. 00 0 to 1000 0 to 1000 0 to 1000 0 to 1000 0 to 1000 0 to 999 0 to 999 0 to 999 Type of control Outlet 1 6fc04 Outlet line 1 control type and delay PROP PROP Outlet 2 6fc04 Outlet line 2 control type and delay UD 0 p o 6fc04 Outlet line 3 control type and delay Set point offset sent to the 6fc05 Set point sent to the chiller chiller C ill of compensation Compensation 6fc06 Maximum compensation offset Type selected FROM CHILLER FROM CHILLER FROM A C OUT TEMP FROM A C F C SLIDING oe 999 to 999 25 999 to 999 0 differential for cooling heating 0 to 999 10 F C sliding threshold C average Type of season selection DIGITAL IN KEYPAD KEYPAD B M S KEYPAD BMS AUTO MODE Select season from CTO Current season pore pa Sel season A EL Autor day AN La AE NE RARE R W 1 to 12 5 A E Peron E TC R W 1 to 12 9 RW 6f c Cooling threshold C R W Cooling changeover threshold C 999 to 999 250 Heating threshold C R W 6fc10 Heating changeover threshold 999 to 999 100 Change delay R W Changeover delay time 0 to 999 0 f differential in cooling 0 to 999 100 line 2 0 to 999 100 Dehumidify dead zone and differential in cooling for 0 to 999 Ei line 3 0 to 999 100 W O Max compens loffset C Compensation from A C Outside 3 e o O Compensation from A C on Ou
19. 4 alarm delay s 0t99 Probe alarm delay R W 7b6 Outlet line 3 probe B5 alarm delay S ies to 999 B4 Outlet 3 s 6 Humid 1 s Humidity probe 1 alarm delay En 0 to 999 7 Humid 2 s Humidity probe 2 alarm delay s 0 to 999 A 8 Humid 3 s Humidity probe 3 alarm delay 0 to 999 a f Code 030221521 Rel 1 1 of 03 09 09 16 N c Carel settings a gej 9 o 9 Oo gt m ER of chiller 7c2 High boiler temperature threshold High boiler temperature differential EB 7c2 Boiler alarm from digital input Line 1 valve present or not Line 2 valve present Line 3 valve present 4 R Valve 1 opening delay from area controller S 0 to 999 Valve 2 opening delay from area controller S 7c4 Valve 1 opening delay from area controller S 7c5 Area Controller minimum cooling set point C 999 to 999 c 999099 7c5 Area Controller maximum cooling set point 5 999 to 999 Area Controller minimum heating set point C 999 to 999 CHILLER CHILLER CHILLER HEAT PUMP 0 to 999 0 to 300 0 to 999 NOT PRESENT PRESENT UJ oiler temp threshold C ifferential C Line 1 ine 2 ine 3 ZIEIEEZEZIS Bun Y x 8 z lt gt o Olio fo TD 2 9 ol pp ze D jo D so e S3 o gt 2D oe zo o 2 o 2 So 3 lt 8 3 lt 3 En S 3 Valve 1 s alve 2 s alve 3 s Area Controller cooling set pointlow C igh C Area controller Temperature heating s
20. 6 1 List of analogue variables Type Address Description RW t Outside temperature R 2 Boller temperature R s oWetempraueini 4 R a 4 Owetememweie2 A fs Joulettemperature mes OOO A 6 Hmdyiei mL 8 Hmdyie3 s Ho hi m Fee Pump line 1 1 1 Pump line 3 Pump line 2 R i i i Ro i R A ES Ro Ro Ro Chiller setpoint RT EE m o e d Virtual probe fancoi R Probe value ST2ofcontrol fancol TR Probe value ST3ofcontolfancol DD O R Probe humidity SCH TH fancoil R Temperature probe value SCH_TH fancoil R i Ro i R i Ro i R R i i i R i Aa T room fan coil 1 Set point fan coil 2 T room fan coil 2 A _ E Set point fan coil 100 T room fan coil 100 Set point fan coil 1 Code 030221521 Rel 1 1 of 03 09 09 35 List of integer variables Type Address Description 0 0 RW I Fan_Coil Selection 1 100 DEED A IDEE EN ee a 50 Working mode freddo caldo caldo res vent off fancoil 51 Number active local alarm 0 no alarm If at the same time will be show the PP Iris lam Camsmmasetesew
21. 722 nu the line and the zone 1 to 3 i to 6 Zone name 722 Setthe name ofthe zone T to z 0 to 9 E ANF iR Set the address for the fan coil in the zone 20 to 121 20 DISAB Tipe of eho Sethe shel rhe ae ee ie BEE EN a Protocol settings R W 7a3 Carel Master protocol baud rate 1200 2400 19200 4800 9600 19200 beers EN peer m nn 59 IS Rennes Wir Ta Ral i ES i tom Number of attempts 0to9 7 b IN OUT Probe configuration 701 Humidity line 1 probe configuration rH 0 to 1000 Humidity line 1 RW rH 0 to 1000 mn c oco So min value orH max value 9orH min value rH RW rH Cor d max value rH Humidity line 3 R W 7b2 Humidity line 3 probe configuration rH oe es max value rH B1 Out temp O NTC ENAS Booer AW 788 Enable probe Ba tor outetprobe mer WTC ENAB DISAB NICEMB Browea RV es Enable probe B for outlet probe inez NICENIB DISHB NIGENAB BE Oues AW 764 Enable probe BS Tor ouiet probe med WTC ENABDISAB NIGENAB Be Humid RW 7i Enable probe Be forhumidiy probe er NTCENABIDISAB AS e eee INTCIPTI000 OAV 0 1V 0 10V 4 20mA B8 ad 3 gt probe B8 for humidity probe line 3 On Offlo 5V a Probe alarm delay RW 7b5 Probe alarm delay 0 to 999 B1 Out temp S Bear robe Bam Gly To 3 Outlet 1 s Outlet line 1 probe B3 alarm delay 0 to 999 4 Outlet 2 s Outlet line 2 probe B
22. 9 16 5 19 16 3 6 19 17 2 7 19 15 4 8 A02 19 15 9 19 16 3 10 19 16 3 Typically this may be the situation in an office when the system is started again after the weekend Terminal units 4 and 8 are ignored as they have active alarms The level of comfort is therefore equal to LoC 3 2 4 3 2 4 3 3 8 3 Consequently LoC gt X If for 60 minutes the level of comfort does not fall below the threshold the boiler or the heat pump set point is increased by 5 C to 50 C Whenever the level of comfort passes increasing or decreasing the set threshold the timer is set to zero Code 030221521 Rel 1 1 of 03 09 09 32 13 Summer Winter changeover This application can manage the changeover of system operation from cooling to heating and vice versa Specifically e Cooling operation enable the activation of the chiller in cooling mode and with corresponding compensation of the outlet temperature send the cooling mode signal to the terminal units e Heating operation enable the activation of the boiler or the chiller in heating mode heat pump and with corresponding compensation of the outlet temperature send the heating mode signal to the terminal units The operating mode can be switched as follows 1 manually from the user interface from a digital input from the supervisory system from the user interface or from the supervisory system programmed changeover based on the calendar 6 automa
23. AREA aran FOR E DRONIC NETWORKS CAREL Application program for pCO I i mtt bi d L f 5 i p d ns n6 L N E NYY ee Ta MM 2o Lio serv d pGD wer interface C fh geo GG S Cola S C D c 120 A N ia an E E cial n field card Med User manual Manual version 1 1 of 09 03 09 Program code FLSTDMAC1E LEGGI E CONSERVA Jr ISTRUZIONI c READ AND SAVE THESE INSTRUCTIONS Technology amp Evolution Contents 1 10 11 12 13 14 15 16 17 APPLICATIONS AND FUNCTIONS PERFORMED BY THE SOFTWARE coccion crec 5 1 1 Introduction cnn 5 1 2 Main Characteristics ON 5 1 3 System Safety Devices A EEEE 5 1 4 Sas P 5 1 5 A NN 5 1 6 Comp tible fiardWale roe t eta ni o ta gea tbe cn oci tbe tet e A 5 17 ec 5 THE USER TERMINAL s cssssssssssssssesssestssteesteestsseessseatsenteeeeaneensees 2 1 Type and operation 2 2 How to assign the pLAN addresses on the pCO3 and the terminals essent tette tenente tentent nentes 6 23 EIFE C M est 7 24 pGD39 terrritial icr recenter c RD D A ROT A TNNT TE ERA TUR VEU TEUER TREE TREE C uod 7 2 5 Changing the display nni ene eo eo eO RU DOO OR HR ERE Ra inp id E itr ire 7 INSTALLING THE DEFAULT VALUES G
24. FORT 25 C 18 C ECONOMY 27 C 16 C During weekdays the rooms in the day zone are essentially used in the late afternoon when returning home from work and in the evening vice versa on weekends the day zone is used much more The following program can thus be set Mon Tue Wed Thu Fri Sat Sun ECO ECO 9 00 l 10 00 ids COMF s D PRECOMF 18 00 COMF 24 00 24 00 Night zone COOLING HEATING COMFORT 25 C 19 C PRECOMFORT 26 C 18 C ECONOMY 27 C 16 C Code 030221521 Rel 1 1 of 03 09 09 25 Typically the requirements of the night zone are different from the day zone as are the times that the rooms are occupied The following program can thus be set Mon Tue Wed Thu Fri Sat Sun COMF 3 00 PRECOMF 9 00 OFF 18 00 To correctly program the area controller proceed as follows 1 enable one water line two zones and two schedulers 2 define a group of general set points for each scheduler 3 program the sequence of general set points 4 activate the corresponding scheduler in each zone In detail 2 to enable the water line the zone and the schedulers press PRG the LED on the PRG button will come on and select the MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the CONFIGURATION menu to access the screen for configuring the system press ENTER to select t
25. N buttons to reach the page for setting the water line proportional bands 6 f c 3 press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm In the same menu a minimum and maximum opening can be set for each mixing valve in each water line defined as a percentage of the total opening travel In summary the control diagram is shown in the following graphs Summer mode Valve opening diff gt Winter mode Valve opening diff All the terminal units are independent in the management of the local climate and generate a water temperature request signal when started as the local conditions deviate from the set point From the viewpoint of energy saving a minimum number of local requests per water line can be set to send the enabling signal upon activation of the line pump line and the chiller or boiler press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password select the TEMP CONTROL menu press the UP and DOWN buttons to reach the page for setting the minimum number of requests per line 6 f c 1 press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm Code 030221521 Rel 1 1 of 03 09 09 21 Finally it may be useful to set a delay between system start up and the opening of the mixing valves in the wa
26. aamns 2 Fancoil master or slave in single node configuration I 58 Activation function SLEEP ECONOMY po ps Offset setpoint if COMFORT functionisactive TR po ps QONOFFsteofcotrol 1 RW po pss QDigtalnpustae RT A Regulation setpoint A pss Operation setpoint RT bo A A SEE I 10 ON OFF fancoil 1 IREE I 102 ON OFF fancoil 2 Ro es OOOO s fa ON OFF fancoil 100 A 16 2 List of digital variables Type Address Description 0 0 OR p pt Pump tthermaloverload RT p pa jgPump2thrmalovelad RR pp 3 Pump Sthermaloverload RT p 4 COOUNG HEATINGchangovr TR D 15 Genrcchllraam RT p le QGemrcbolraarm RR p 7 i High water circuit pressure RR p 8 TI CU CA C ee D f O CU p 21 gPumpim2 RT p 2 Pumping CU p 29 mol RT p 24 X On Off Boller CU p 25 Cooling Heating RR D 26 a Sei A AA je p 3 Cooling eating selection rom BMS T el eee ee sn p 5 State digital input request 6 R p fsa Sttedg slinutrequstod 5 RO 52 state digital imput busy O oOo R Ee s CI Wamoawli A Alarm on tan R Alarm on tan oa AR DU pu ee SA NamonanciWo a Code 030221521 Rel 1 1 of 03 09 09 36 17 Alarms The area controller collects the info
27. ail This application allows the user to define up to six time schedulers each of which can be assigned to a any of the zones Belting a scheduler means establishing a certain sequence of the operating status of the terminal units during the day as follows OFF set point economy ON set point comfort ON set point pre comfort ON Up to four switching cycles i e four time bands can be defined over a day Each day of the week can be programmed independently from the others nonetheless for faster programming within the week the settings defined for one day can be copied to another To create a new scheduler it first needs to be enabled as described in 8 2 in addition the set points need to be defined for comfort pre comfort and economy mode as described in 9 3 3 Only then can a programmed sequence be established according to the following procedure e press PRG the LED on the PRG button will come on and select the DATE TIME menu press the UP and DOWN buttons to reach the screen for defining the scheduler 3 c press ENTER to select the desired fields use the UP and DOWN buttons to select the desired value press ENTER to confirm 11 1 Example An example can be used to clarify the overall procedure the example involves programming an area controller installed in a domestic installation with one water line and divided into two zones Day zone COOLING HEATING COMFORT 24 C 20 C PRECOM
28. anual RS485 for communication with Modbus Carel protocols pCOWeb for communication via Ethernet with BACnet Ethernet and IP SNMP XML HTML e mail pCOnet for communication with BACnet MS TP protocol LonWorks Trend RS232 for communication via GSM or analogue modem KNX This application can communicate with a supervisory system with the Modbus protocol via an RS485 interface the Carel software supervisory systems PlantVisor PRO features a dedicated page for communication with this application To set the communication parameters proceed as follows e press PRG the LED on the PRG button will come on and select the SERVICE menu select the BMS CONFIGURATION menu 6 c press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm If the settings are correct serial address and communication speed the parameters shown in the following table will be sent by the unit Setting the serial identification number to 0 disables serial communication with the supervisory system The number of variables is limited so it is necessary use a variable like switch and read the data regarding each single fancoil The adress of this variable is E Fan Coil Selection 1 100 The variables that can be swithched will be indicated in bold carachter in the follows table Below is the list of the variables shared with the supervisory system 1
29. e press ENTER to select field F3 set the starting time 18 00 and the ECO mode press ENTER to select field F4 set the starting time 20 00 and the COMF mode press ENTER to select the COPY TO field and set Tuesday press ENTER to select the number of the scheduler in question and set 1 press ENTER to enable the scheduler and set YES press ENTER to select the day of the week and set Monday press ENTER repeatedly until selecting the COPY TO field and set Wednesday repeat the steps from 3 10 to 3 14 until Sunday press ENTER to confirm 2 to activate the scheduler press the PRG button the LED on the PRG button will come on and select the ON OFF menu select the ZONE menu press ENTER to select the water line and set 1 press ENTER to select zone 1 DAY and set AUTO press ENTER to select zone 2 NIGHT and set AUTO press ENTER to confirm Code 030221521 Rel 1 1 of 03 09 09 27 12 Chiller or boiler setpoint compensation In general most modern chillers and boilers are fitted with an electronic controller that manages the water temperature set point using control logic based on the outside temperature The area controller can be connected to a temperature probe that measures the outside climatic conditions and can therefore manage the compensation algorithm In addition the area controller has been implemented with a new compensation algorithm that is based on the evaluation of the requirements and the level of comfort in each env
30. e conditions to be set 6 f c 6 press ENTER to select the desired field use the UP and DOWN buttons to define the temperature thresholds press ENTER to confirm Example 1 Consider a residential air conditioning system in cooling operation typically climate compensation will be used to avoid excessive temperature differences between the air conditioned rooms and the outside Settings chiller set point 7 C maximum compensation 3 C Outside temperature set point 28 C Outside temperature differential 4 C The following graph shows the result Corrected set point C 28 C Therefore when the outside temperature rises above 28 C the chiller set point is increased proportionally until reaching the maximum value of 10 C for temperatures above 32 C Code 030221521 Rel 1 1 of 03 09 09 29 Example 2 Consider an installation that needs to maintain stable environmental conditions for example inside a certified test laboratory typically the cooling capacity will need to be increased as the outside temperature increases Settings chiller set point 8 C maximum compensation 3 C Outside temperature set point 28 C Outside temperature differential 4 C The following graph shows the result Corrected set point C 28 p C Therefore when the outside temperature rises above 28 C the chiller set point is proportionally reduced until reaching the minimum value of 5 C for
31. e their behaviour but the user can at any time change the local settings and override the area controller Typical examples are local ON OFF changing the set point or switching of the mode to DRY in summer The last control always has priority on the existing operating status for example assuming the area controller manages the activation and deactivation of all the terminal units at certain times and that a certain terminal unit that is on is then switched off by the user At the set time the area controller will send an OFF command to switch all the units off including the unit in question When the next system ON time arrives all the terminal units will receive the ON command from the area controller and will all start operating without exception Moreover it is clear that any local settings that are in contrast with the operating mode set by the area controller cannot produce results For example in the standard situation of two pipe system operating in heating mode the water circuit thus sends the terminal units hot water a zone can be locally switched to cooling mode however this has no practical effect as the system does not produce cold water and the cool enable function envisaged in the terminal units does not allow the fans to start as the minimum coil temperature conditions are not featured Important to fully exploit the performance of the system IT IS STRONGLY RECOMMENDED not to manually change the local settings of the terminal u
32. ect the pre comfort set point in HEATING mode and set 18 2 8 press ENTER to select the economy set point in COOLING mode and set 27 2 9 press ENTER to select the economy set point in HEATING mode and set 16 2 10 press ENTER to confirm Code 030221521 Rel 1 1 of 03 09 09 26 2 11 2 12 2 13 2 14 2 15 2 16 2 17 2 18 2 for the night zone press ENTER to select the field relating to the number of the scheduler associated with the set point and set 2 press ENTER to select the comfort set point in COOLING mode and set 25 press ENTER to select the comfort set point in HEATING mode and set 19 press ENTER to select the pre comfort set point in COOLING mode and set 26 press ENTER to select the pre comfort set point in HEATING mode and set 18 press ENTER to select the economy set point in COOLING mode and set 27 press ENTER to select the economy set point in HEATING mode and set 16 press ENTER to confirm gt to program the daily sequences press PRG the LED on the PRG button will come on and select the DATE TIME menu press the UP and DOWN buttons to reach the screen for defining the scheduler gt for the day zone press ENTER to select the number of the scheduler in question and set 1 press ENTER to enable the scheduler and set YES press ENTER to select the day of the week and set Monday press ENTER to select field F1 set the starting time 00 00 and ECO mode press ENTER to select field F2 set the starting
33. er outlet set point can be increased by a certain offset with a consequent increase in the COP of the chiller and a reduction in energy consumption ensuring overall optimisation of the resources Corrected set point C Set point set X LoC C Example Assuming the following variables have been set Chiller outlet set point 7 C Satisfaction threshold X 2 C Offset 3 C Calculation interval 60 min Corrected set point C LoC C The area controller will query the terminal units and record the local temperature T and set point SP Assuming the situation found is as follows fan alarm SP T S T SP 1 24 25 1 2 24 26 2 3 24 24 0 4 A01 22 20 5 22 24 2 6 23 23 0 7 25 23 2 8 A02 24 23 9 25 25 0 10 22 24 2 Terminal units 4 and 8 are ignored as they have active alarms in the same way unit 7 has a negative deviation and therefore does not require further cooling and therefore is also ignored The level of comfort is therefore equal to LoC 1 2 0 2 0 0 2 7 1 Consequently LoC lt X If for 60 minutes the level of comfort does not rise above the threshold the chiller set point is increased by 3 C to 10 C Whenever the level of comfort passes increasing or decreasing the set threshold the timer is set to zero Code 030221521 Rel 1 1 of 03 09 09 31 12 2 2
34. erating mode fan speed ON OFF To display the information proceed as follows e press the PRG button the LED on the PRG button will come on and select the In Out menu e select the FAN COIL menu e select the desired terminal unit the units are classified by line zone and progressive number If the terminal unit selected is a MASTER some of the parameters listed above can be set specifically set point operating mode fan speed ON OFF Code 030221521 Rel 1 1 of 03 09 09 22 The complete procedure for setting the parameters on a master terminal unit is described as follows e press the PRG button the LED on the PRG button will come on and select the In Out menu select the FAN COIL menu select the required terminal unit the units are classified by line zone and progressive number press ENTER to select the desired field use the UP and DOWN buttons to select the desired value e press ENTER to confirm The operating parameters on the terminal units classified as SLAVES cannot be set individually as by definition they follow the settings on the master they are logically connected to 9 3 2 Using the user interface on the terminal units The terminal units can be fitted with a user interface where necessary dedicated to a zone following master slave logic The local user interface has full control over the operation of the terminal units this means that the system sends the terminal units all the data required to defin
35. et point Y Q o Scheduler cooling temperature limit low C ing high C Minimum value Bid 7 a Maximum value point value point value 7d1 Load the default values Wait for default values nitialise scheduler 7d2 lnitialise scheduler lease wait Wait for initial scheduling values new manufacturer R W 7d3 Enter new manufacturer password password e Test IN OUT O o 2 a gt a o j DC T D 2 3 a o 180 40 500 40 7c6 Area Controller maximum heating set point C 999 to 999 500 150 350 150 50 ing high C T D 5 ea a gt N d Initialisation efault values WAIT 0 to 9999 gt 1 il D D IELELE N Code 030221521 Rel 1 1 of 03 09 09 17 7 List of screens The area controller user interface is used to access all the functional information on the installation this information is organised according to the structure shown below The general structure of the screens is independent of the user interface connected Some screens may have a different appearance depending on the terminal used while the path to access the parameters remains the same 7 1 Password Access to some of the menus is protected by a four number password specifically the list shown in the previous paragraph describes the screens with protected access in addition two different passwords PW1 and PW2 can be defined to limit access to groups o
36. f different screens respectively PW1 for some of the screens in group 6 PW2 for the screens in group 7 The default password identical for PW1 and PW2 is 1234 and can be changed by the user at any time To change the password to access some screens in the SERVICE menu PW1 proceed as follows e press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password using the UP and DOWN buttons and press ENTER select the CHANGE PSW menu 6 f e press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm To change the password to access the MANUFACTURER menu PW2 proceed as follows press PRG the LED on the PRG button will come on and select the MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the INITIALISE menu to access the change password screen 7 d 1 press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm If the password is lost or forgotten the access code set by Carel non modifiable by the user is always valid For this application the code is 1315 Code 030221521 Rel 1 1 of 03 09 09 18 8 System configuration 8 1 Devices controlled This application is designed for a two pipe system fitted with a chiller and a b
37. group of terminal units for example all the fan coils in a room it is often useful to assign one of the units to a higher hierarchical level master This allows the user to control via a special interface just one device which in turn shares the appropriate information with the connected devices these devices slaves operate in a coordinated manner to support the master in the thermodynamic action set on the latter The quantity type and direction of the data that sent and received depend on the physical network support the communication protocol and the setting of specific parameters for further information see to the corresponding technical documents Code 030221521 Rel 1 1 of 03 09 09 19 8 2 Configuring the system The program only shows the user the data corresponding to the devices that are enabled Consequently the number of water lines the number of zones in each line and the number of schedulers need to be set The procedure described below is used to enable the water lines the number of zones associated with each water line and the number of schedulers that can be defined e press PRG the LED on the PRG button will come on and select the MANUFACTURER menu e enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch e select the CONFIGURATION menu to access the screen for configuring the system 7 a 1 e press ENTER to select the desired row nu
38. h the Carel e drofan electronic controller complete with serial communication board and user interface where necessary acqua terminal e droset or remote control 1 7 Types of installation This software is designed for the control of a two pipe hydronic system supplied by a water chiller and a boiler or by a chiller heat pump Code 030221521 Rel 1 1 of 03 09 09 5 to the U L 0 pco3 CANbus d i to the BMS to the fan coils 2 The user terminal 2 1 Type and operation This application is designed for operation on two types of user terminal that is 1 PGD 1 LCD user terminal 2 PGDSG touch screen user terminal The user terminal can be used to perform all the operations allowed by the application program installed It also displays the operating conditions of the unit The user terminal can be used to set all the operating parameters of the unit in real time The correct operation of the unit does not require the user terminal to be connected Important note for the correct operation of the terminal when loading the software onto the pCO programmable controller all the binary files iup corresponding to the languages and the types of terminal must also be transferred the software automatically recognises the terminal connected If more than one terminal is connected the software gives priority to the pGD3 terminal however the terminal used can be set in the SERVICE PAR menu 2 2 How to ass
39. he number of water lines and set 1 water line press ENTER to select the number of zones for water line no 1 and set 2 zones press ENTER to select the number of schedulers and set 2 schedulers press ENTER to confirm NOOO RON BETIS eLR gt to name the zones 1 8 press the UP and DOWN buttons to display the page corresponding to the zone configuration 1 9 press ENTER to select the LINE field and set 1 1 10 press ENTER to select the ZONE field and set 1 1 11 press ENTER to select the NAME field and set DAY 1 12 set the network addresses of the terminal units 1 13 press ENTER to select the LINE field and set 1 1 14 press ENTER to select the ZONE field and set 2 1 15 press ENTER to select the NAME field and set NIGHT 1 16 set the network addresses of the terminal units 1 17 press ENTER to confirm 2 to define the general set points 2 1 press the PRG button the LED on the PRG button will come on and select the SET POINT menu 2 2 press the UP and DOWN buttons to reach the page for setting the general set points gt for the day zone 2 3 press ENTER to select the field relating to the number of the scheduler associated with the set point and set 1 2 4 press ENTER to select the comfort set point in COOLING mode and set 24 2 5 press ENTER to select the comfort set point in HEATING mode and set 20 2 6 press ENTER to select the pre comfort set point in COOLING mode and set 25 2 7 press ENTER to sel
40. hms of varying sophistication resident in the controller itself In the event where the installation consists of a series of sub systems of this type the supervisor network connects all the area controllers 1 2 Main characteristics This application manages up to 100 terminal units including 64 master units up to 3 water lines up to 6 zones for each water line up to 6 schedulers with one scheduler allocated to each zone the algorithm for compensating the water temperature set point the dehumidification function for the water line the mixing valves in the supply loop one for each water line 1 3 System safety devices Chiller alarm input Boiler alarm input Pump thermal overload input for each water line High pressure alarm input in the water circuit Remote ON OFF input 1 4 Other functions Centralised control of the installation Alarm logging Multi language management 1 5 Unit of measure This application uses the metric unit of measure International system 1 6 Compatible hardware This software can be loaded on pCO Medium and Large controllers Communication with the terminal units fan coils cassette units occurs over a CANbus network while the information is shared with the supervisory system where available via the Modbus protocol consequently a CANbus serial board needs to be installed on the field bus port plus a RS485 serial board The terminal units need to be fitted wit
41. ically the pumps are controlled with ON OFF logic and the valves with a 0 10 V signal The possibility to manage up to three water lines makes the area controller extremely flexible and open to any expansions of the installation The system only shows the user the information relating to the water lines that are enabled 8 1 2 Chiller The area controller can directly control the activation and deactivation of a chiller via a dedicated relay In addition it provides a 0 10 V signal proportional to the offset applied to the chiller temperature set point calculated by the area controller based on the compensation algorithm A digital input is reserved for any chiller alarms 8 1 3 Boiler The area controller can control directly the activation and deactivation of a boiler via a dedicated In addition it provides a 0 10 V signal proportional to the offset applied to the temperature set point calculated by the area controller based on the compensation algorithm A digital input is reserved for any boiler alarms 8 1 4 Terminal units The area controller manages the terminal units via a CANbus serial connection The terminal units must be fitted with the e drofan electronic controller connected to a CANbus network using the special serial board Each terminal unit can be fitted with accessories such as user interface ambient temperature probe and humidity probe See the technical documents on the devices listed for further information When setting
42. ign the pLAN addresses on the pCO3 and the terminals The user terminal must be connected to the area controller according to the following diagram The pLAN addresses must be unique and follow the diagram shown above 2 2 1 Setting the address on the pCO controller To set the pLAN address on the pCO board proceed as follows e Power down the pCO3 board and connect a PGD1 or pGD3 terminal with pLAN address 0 e Power up the pCO3 board by holding the Alarm Up buttons until the pLAN Address screen appears e Enter the pLAN address 1 with the Up and Down buttons and then confirm by pressing Enter e Power down the pCO3 board 2 2 2 Setting the address on the pGD1 terminal To set the address on the pGD1 terminal proceed as follows e Power up the terminal e Press the Up Down ENTER buttons until the display address setting screen is displayed e Enter the pLAN address with the Up and Down buttons and then confirm by pressing Enter e If setting the address to 0 the procedure is now concluded If on the other hand the address of the terminal is being set for normal operation address 32 the No link screen is displayed for a few seconds If the NO Link screen remains press Up Down ENTER again e Press Enter e Set the parameters according to the following screen EEE P 01 Adr Priv Shared li Trmd 32 Sh Trm2 31 Sh Trm3 None OK No FEI IIIT RR RIT RR I II RR FA
43. ill come on and select the SERVICE menu select the SERVICE PAR menu and enter the password select the TEMP CONTROL menu use UP amp DOWN to select the page relating to the compensation function 6 f c 5 press ENTER to select the desired field use the UP and DOWN buttons to choose the compensation logic based on the level of comfort press ENTER to select the field relating to the offset to be applied press ENTER to confirm use the UP and DOWN buttons to select the page corresponding to the comfort conditions to be set 6 f c 7 press ENTER to select the desired fields use the UP and DOWN buttons to define the desired values press ENTER to confirm Code 030221521 Rel 1 1 of 03 09 09 30 12 2 1 Compensation in cooling In cooling operating mode the compensation algorithm queries all the terminal units that are operating correctly at regular intervals records the local temperature T and set point SP and then calculates the deviation for each unit S T SP Note that in cooling mode the air conditioning system has the task of lowering the temperature in the room and therefore can only contrast positive deviations therefore only positive deviations are considered to calculate the average value which by definition corresponds to the level of comfort LoC If the level of comfort remains below the set satisfaction threshold X the comfort conditions are considered to be satisfying on average and consequently the chill
44. inal mss TAT mses I I I 1 Season RT Season Jl Main screen for 6 button terminal On Off Use UP amp DOWN to select the fields in the menu and Set point then press ENTER to access the selected menu Clock Sched In Out Log Service Manufacturer 1 On Off main screen for 6 button terminal Use UP amp DOWN to select the fields in the menu and then press ENTER to access the selected menu UL OMEN A o es o AAA L then press ENTER to access the selected menu i JA Tal Une Tzone Toperalngmode 1 pa RW tat_ Line zone operating mode o EE pa Rw tat_ Line zone 3 operating mode o B4 RW tal net zone 4 operatingmode T ow f t5 Rw tat_ Linet zone S operating mode Ear pe 16 RW tar fons zone 6 operating mode o gt 1 a 2 Line 2 Bn AW i Une2zoneToperaingmode 95 hz aw 122 line 2 zone 2operatingmode O Com of Bs Pw 122 une zone Soperaingmode Precom of pi RW ie line 220ne 4 operating mode Fo 25 RW red fine zone 5 operating mode i 28 RW ia ine 2 zone opera mode EE a ei Kae gt 1 a 3 Line 3 Bi a Tope Ian 32 RW a8 line zone Z pera noi gt gm or 53 RW Tas inesse operan mod a e A 30 RW a8 lie zore ean noi i ur Ba 35 RW a le zone operan mo m HEC RN DN ae A s ine Sore opera nod BER Fr 1 b Chi
45. ironment this ensures very efficient management of the energy resources and guarantees ideal comfort The user can therefore choose whether to have the set point compensation function managed by the area controller or by an external controller to do this proceed as follows press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password select the TEMP CONTROL menu use UP amp DOWN to select the page relating to the compensation function 6 f c 5 press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm If choosing to use the resident compensation algorithm access is provided the related parameters 12 1 Compensation based on the outside temperature The first option for set point compensation is based on the outside temperature measured by the dedicated temperature probe To define the thresholds and the operating conditions of the algorithm the following need to be defined once the outlet temperature set point has been set 1 the maximum deviation that can be applied to the set point temperature 2 the temperature threshold which determines the outside climatic conditions in which compensation is operational 3 a temperature differential inside which the deviation from the set point is partial The deviation and the temperature differential must be considered with the sign there are possible four
46. l to start the chiller or the boiler Note that the area controller only controls the requests that are coherent with the set season that is in cooling operation only the requests to activate the chiller are counted and in heating operation only the requests to activate the boiler or the heat pump are counted In addition set point compensation algorithms can be set for the chiller or the boiler these algorithms are described in detail in a specific chapter The result of the compensation algorithm is converted into a 0 10 V analogue signal Finally two digital inputs can be assigned on the area controller one for the chiller and one for the boiler used to receive the signal relating to the alarm status of the controlled devices In the event of alarms the red LED is activated on the alarm button on the area controller user terminal pressing the button accesses the screen for displaying the alarms 9 3 Terminal units The management of all the terminal units fan coil cassette units is centralised onto just one device that is the area controller Communication between the terminal units and the area controller occurs via a CANbus serial interface The set point of a terminal unit can be managed in different modes 9 3 1 Local setting The main operating parameters can be displayed for each individual fan coil that is temperature measured by the local probe if fitted humidity measured by the local probe if fitted set point op
47. ller cuentas A amp Pasame AS gt gt press ENTER lt lt R 1b Tells the user to switch the chiller on off i ieee ae O OS 1 c Boiler Cure A te aras utem press ENTER lt lt R 1c Tells the user to switch the boiler on off Hu 1 d Area Controller Current status R 1d Status of the area controller system TET d 45 press ENTER lt lt uid Tells the user to switch the area controller on off MI 1j Code 030221521 Rel 1 1 of 03 09 09 10 2 Set point main screen for 6 button Sum mm merum os Dom C70 Am 2a Comotsetpontin cog O oa 2 Comin ere AM 2a Comton set pontin heating 76 sms 85 Precom C70 Mm 2a _ PreGonsetpontin coi 9559s 0 gt gt Precom 7076 Am a _ PreConfsetpontin eng 6 sms ao Economy Am 2a Economy setpontin cooing 5595 om Economy 676 AM 2a Economy setpantin eng 76 9505s 9 Duett C RW 2s fouietinetsetpontin cooing wom w gt gt Out re AM 20 Outet ine T setpontin heating 76 soso 0 CEREC PAW 2e outer me 2setpomtm coig 6 Bono of Ouez ce RT 20 uietinezsepeninTexn C 50686 LEAN ee a enr omes COMI Mc Ous 070 Mm 20 Outet ine Ssetpontin hean 7 0885 aa set
48. manages the information read by eight probes these may be different types as follows Outside temperature probe Boiler outlet temperature probe Outlet temperature probe in each water line downstream of the mixing valve Centralised humidity probe connected to each water line All the probes can be enabled or disabled while for the humidity probes the type of probe and the measurement limits can be defined To do this e press PRG the LED on the PRG button will come on and select the MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the In Out menu to access the screen for configuring the probes 7 b 1 use the UP and DOWN buttons to scroll the pages to access the various probes press ENTER to select the desired row use the UP and DOWN buttons to select the desired value press ENTER to confirm A corrective factor can be set for all the probes defined as the deviation to be added to or subtracted from the value read press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password using the UP and DOWN buttons and press ENTER select the CALIBRATION menu to access the screen for setting the probe offset 6 f b 1 use the UP and DOWN buttons to scroll the pages to access the various probes press ENTER to select the desired field use the UP and DOWN buttons to selec
49. mber of water lines number of zones for water line no 1 zones for water line no 2 zones for water line no 3 number of schedulers e usethe UP and DOWN buttons to select the desired value e press ENTER to confirm In the same menu once the water lines the zones and the schedulers have been enabled a name can be assigned up to 11 characters available for each zone and then the terminal units can be allocated to the zones based on their serial addresses variable from 21 to 120 press PRG the LED on the PRG button will come on and select the MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the CONFIGURATION menu to access the screen for configuring the system 7 a 2 press the UP and DOWN buttons to display the page corresponding to the zone configuration press ENTER to select the required fields use the UP and DOWN buttons to select the desired value press ENTER to confirm Important note a network address must be assigned to each terminal unit before connecting the network according to the specific procedure for each individual unit the serial addresses of the terminal units cannot be set from the area controller The procedure described above simply associates a certain number of terminal units identified by the corresponding addresses with a certain zone 8 3 Configuring the probes The area controller directly
50. nd DOWN buttons to select the desired value press ENTER to confirm The communication parameters should only be set by specialist personnel 9 4 Trend of significant values pGD3 user interface When using the pGD3 graphic terminal the user can display a graph of the trend over time of some significant values with the time and the sampling frequency defined by the program 10 Setting the clock and the date To set the current time and date proceed as follows e press PRG the LED on the PRG button will come on and select the DATE TIME menu the main screen is used to set the current time and date 3 a press ENTER to select the desired field time date use the UP and DOWN buttons to select the desired value press ENTER to confirm 10 1 Daylight saving The area controller can manage the automatic changeover to from daylight saving time To enable or disable the function proceed as follows e press PRG the LED on the PRG button will come on and select the DATE TIME menu press the UP and DOWN buttons to reach the page for enabling the algorithm 3 b press ENTER to select the desired row use the UP and DOWN buttons to select the desired value press ENTER to confirm The procedure described above can also be used to modify the changeover criteria date and deviation Code 030221521 Rel 1 1 of 03 09 09 24 11 Scheduler Chapter 9 3 3 introduced the concept of the scheduler which is now described in more det
51. nd economy mode in both cooling operation and heating operation e use the UP and DOWN buttons to select the desired value e press ENTER to confirm Then as mentioned the group defined is made available to all the zones assigned to the associated scheduler To define the effective zone set point proceed as follows e press the PRG button the LED on the PRG button will come on and select the ON OFF menu select the ZONE menu select the desired water line select the desired zone press ENTER to select the desired field use the UP and DOWN buttons to select the desired value between OFF COMFORT PRECOMF ECO and AUTO e press ENTER to confirm The latter procedure allows the user to assign one of the general set points to all the zones or alternatively choose AUTO mode to activate the sequence defined by the scheduler Code 030221521 Rel 1 1 of 03 09 09 23 9 3 4 Communication protocol with the terminal units The default settings of the parameters for serial communication with the terminal units may need to be modified To do this proceed as follows e press PRG the LED on the PRG button will come on and select the MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the CONFIGURATION menu and then the page corresponding to the terminal unit communication parameters press ENTER to select the desired field use the UP a
52. nits managed by the area controller 9 3 3 Zone set points From the viewpoint of centralised management this application allows the possibility to define three general zone set points called comfort pre comfort and economy These set points can be assigned to one or more zones or managed based on a preset sequence using a scheduler up to six schedulers can be defined and different groups of general set points can be assigned to different schedulers In essence each zone can be assigned a scheduler from the six available for each scheduler enabled a group of general set points can be defined comfort pre comfort and economy and these are then automatically associated with the zones assigned to the scheduler that these are defined for The concept is represented in the following figure Cooling Heating xxx C Comfort scheduler 1 6 Each zone can be set to operate with a general fixed set point or following a sequence of set points defined by a scheduler The schedulers are described in detail in a specific chapter To define a group of general set points proceed as follows e press the PRG button the LED on the PRG button will come on and select the SET POINT menu e press the UP and DOWN buttons to reach the page for setting the general set points e press ENTER to select the desired fields that is the number of the scheduler associated with the set points the set point in comfort pre comfort a
53. oiler that produce cold and hot water respectively The chiller must be fitted with its own controller and the terminal units fan coils must be fitted with special electronic controllers and serial interfaces connected to a CANbus network The mixing valves in the water lines that supply the fan coils are controlled by an electrical actuator A supervisory system is also envisaged for serial communication An example of the system is shown in the figure on the side The area controller which is connected to the user interface via pLAN communicates with the various components in the system in three distinct modes wired logic hardware inputs and outputs serial CANbus and B Modbus serial communication or alternatively Carel 0 me 5 In particular wired logic is used to control the actuators in the poo water circuit mixing valves pumps and the units for the 1 production of cold and hot water chiller and boiler serial a to the BMS to communication via the CANbus network is used to control the terminal units fan coils Finally the Modbus or Carel protocol is used to share the information available with an optional supervisory system the latter point is described separately in this manual Chap 16 CANbus to the fan coils 8 1 1 Water circuit The area controller can control the circulating pump and the mixing valve in three water lines and monitor the temperature downstream of the mixing valve Typ
54. on then press ENTER to access the selected menu c Temperature control d Reset log e Change PSw gt 6 f a Hour counters Alain threshold counts R W 6fat Pump 1 hour counter alarm 0 to 99 hours 0 to 999 Smp T dt h il wir er foie sims 7 eset hour counter pump 1 RAW 6la2 Reset pump Thourcouneraam Yeo Pumz PW fad Reset pump 2hourcounteralam Pumps RW S2 Resetpump 3 hour counteralarm _ rites RW fad Reset chilerhourcounteralam Boer PW ad Reset bolerhourcouneralam gt 6 f b Probe calibration BiOwez7C RW bi Oulettemperatureprobeine2 fo 969 gt 0 Bomas c aw 652 Oulet temperature poene e 989 9 BoHumdyisuH AW 662 Humdypmbeiei E oe 9 BrHumdiyz uH RW 662 Humdypubeiez E on 9 B Humdiy3TaH RW S52 Rumidty probe ines JH om 9 gt 6 f c Temperature control Minimum number of requests for cooling L1 L2 L3 For heating 6fc01 Minimum number of fan coils that require heating 0 to 50 L1 L2 L3 b to 50 0 to 50 Min valve opening 6fc02 Minimum valve opening Minimum number of fan coils that require cooling et 1 et 2 et 3 et 1 et 2 et 3 i 6fc02 Maximum valve opening R W R W R W et line temperature band 6fc03 Control band for the outlet lines et 1 C et 2 C let 3 C Code 030221521 Rel 1 1 of 03 09 09 14 0 to 10
55. rmation relating to the alarms on all the connected devices and signals these to the user In general when an alarm is activated the red LED is activated on the area controller user terminal and an OFF command is sent to the device in question pressing the ALARM button on the area controller user terminal displays the available information relating to the alarm in progress 17 1 Table of alarms NEG E XEB oF Moa BELIEBTER or disconnected NO NO NO NO Manual Settable disconnected disconnected PR oll Rol RE ool ered Hail ll Io eol oed iei Settable Outlet 2 probe broken or disconnected NO Foro NN eg broken or disconnected esee SN poem or disconnected E E Arlt or disconnected A EAS al lo or disconnected Pump 1 overload OFF OFF OFF NO NO Manual Settable Pump 2 overload OFF OFF OFF NO NO Manual Settable Pump 3 overload OFF OFF OFF NO NO Manual Settable Chiller alarm YES NO ON ON Orr Manual Settable 15 Boileralam_____ No YES ON ON OFF Manual Settable YES Bau alarm 17 High temperature alarm NO YES YES YES ON Manual Settable pct bs DA ia address alarm 19 Fancoilofine NO NO NO NO NO Manual Settable 20 Fancoillocalaam NO Manual Settable NO NO NO NO ME osa MEME MEA CN ee ERE eed usu alarm NN Aon ME ee EM ee gh ee Bd pee alarm En EEE e alarm
56. splay During the system maintenance operations it may be necessary to modify the priority that is automatically assigned to the user terminals To change the display from the pGD3 terminal address 31 in the pLAN network to a pGD1 terminal address 32 in the pLAN network access menu 6 a 2 change language and set the item in the Change display field to pGD1 Code 030221521 Rel 1 1 of 03 09 09 7 3 Installing the default values When the controller is booted up for the first time the software automatically the assigns default values selected by CAREL to all the system configuration parameters Always check the connections between the various boards and terminals before powering up the pCO board boards This section describes the procedure for restoring the default values useful when needing to reset the system This operation does not need to be performed when first starting the system WARNING this procedure irreversibly deletes any settings made by the user Proceed as follows press PRG the LED on the PRG button will come on and select tte MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the INITIALISE menu to access to default installation screen 7 d 1 press ENTER to select the option YES or NO select the option YES the system loads the default values and prompts to wait until the operation is completed re
57. start the controller as required by the message displayed on the terminal 4 Selecting the language When the unit is switched on by default a screen is displayed for selecting the language Italian English This screen is displayed for 30 seconds after which the application automatically opens the main menu The language can be selected at any time as follows e Press PRG the LED on the PRG button will come on and select the SERVICE menu e Select the LANGUAGE sub menu 6 a 1 e press ENTER and select the desired language e press ENTER to confirm The initial language selection screen can then be disabled e Press PRG the LED on the PRG button will come on and select the SERVICE menu e Select the LANGUAGE sub menu e Scroll the menu to the page for enabling the initial screen 6 a 2 e press ENTER to enable or disable the screen Code 030221521 Rel 1 1 of 03 09 09 8 5 List of inputs outputs 5 1 DIGITAL INPUTS N pCO3 MEDIUM and LARGE D Pump 1 thermal overload D Pump 2 thermal overload D3 Pump 3 thermal overload D4 Cooling Heating changeover D5 Generic chiller alarm D6 Generic boiler alarm D7 High water circuit pressure D8 Remote On Off 5 2 ANALOGUE INPUTS N pCO3 MEDIUM and LARGE B1 Outside temperature B2 Boiler temperature B3 Outlet temperature line 1 B4 Outlet temperature line 2 B5 Outle
58. t temperature line 3 B6 Humidity line 1 B7 Humidity line 2 B8 Humidity line 3 B9 B10 5 3 DIGITAL OUTPUTS N pCO3 MEDIUM and LARGE No 1 Pump line 1 No Pump line 2 No 3 Pump line 3 No4 Chiller On Off No 5 Boiler On Off No 6 Cooling Heating No7 No 8 Alarm No 9 Dehumidification line 1 No10 Dehumidification line 2 No 11 Dehumidification line 3 5 4 ANALOGUE OUTPUTS N pCO3 MEDIUM and LARGE Y1 Valve line 1 Y Valve line 2 Y3 Valve line 3 Y4 Chiller set point offset Code 030221521 Rel 1 1 of 03 09 09 6 List of parameters This application allows the user to customise the configuration of the system and adjust the control logic without having to modify the software This flexibility is made possible by the use of numerous parameters that can be set in the field the following table provides an overview of the parameters used by the software describing the default value range of values and unit of measure for each For the meaning of the individual parameters see the following chapters that describe in detail the algorithms implemented and the setup procedures The table also describes the ID code of the screen used to access the individual parameters the ID code is also shown in the descriptions of the procedures and the algorithms Main screen for 6 button term
59. t the desired value press ENTER to confirm Code 030221521 Rel 1 1 of 03 09 09 20 9 System management One of the most significant features of the area controller is the possibility to manage all the devices in the system connected to the same controller from one single interface The following paragraphs provide an overview of the main functions available 9 1 Water circuit The area controller can manage the actuators in three water lines via three digital ON OFF signals and three 0 10 V signals The default control mode features for each water line a 3 way modulating mixing valve and a circulating pump controlled with ON OFF logic The control of the mixing valve is based on the temperature set point for the water line while the circulating pump is activated based on the requests from the terminal units To set the temperature set point for a water line proceed as follows press the PRG button the LED on the PRG button will come on and select the SET POINT menu press the UP and DOWN buttons to reach the page for setting the water line temperature set points 2 c press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm Note that a proportional control band can also be set press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password select the TEMP CONTROL menu press the UP and DOW
60. temperatures above 32 C 12 2 Compensation based on the level of comfort The area controller provides the user an alternative algorithm for compensating the outlet temperature based on the concept of level of comfort The level of comfort is defined as the average deviation between the set point on the individual terminal units and the local temperature measured by the same unit Only the terminal units that are correctly operating that is on and without any active alarms contribute to the calculation of the level of comfort In addition only the deviations that can be contrasted by the current operating mode are considered The calculated level of comfort is updated regularly and compared against a satisfaction threshold If the level of comfort is lower than the established threshold it means that on average the comfort conditions are considered satisfying if this situation is maintained for the time set by the user the algorithm gives priority to an energy saving strategy In the opposite case that is if the level of comfort remains above the established threshold for a certain time priority is given to reaching the comfort conditions through higher system capacity A delay time is set to avoid continuous variations in the set point the counter is set to zero whenever the trend in the level of comfort crosses the set threshold in both directions To define this compensation logic proceed as follows press PRG the LED on the PRG button w
61. ter lines to ensure starting conditions with a reduced thermal load e press PRG the LED on the PRG button will come on and select the MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the MANUFACTURER PARAM menu use the UP and DOWN buttons to scroll the pages until reaching the screen for setting the delays 7 c 4 press ENTER to select the desired fields use the UP and DOWN buttons to select the desired value e press ENTER to confirm 9 2 Chiller and boiler The area controller can interact with the chiller and the boiler in a normal two pipe system First of all the area controller manages the changeover in the system operating conditions from cooling to heating and vice versa specifically this means that if a reverse cycle unit is used the area controller manages the changeover from chiller to heat pump and vice versa otherwise if a chiller and a boiler are used the device coherent with the current operating mode will be activated the chiller in cooling operation the boiler in heating operation To set the type of unit used in the installation proceed as follows e press PRG the LED on the PRG button will come on and select the MANUFACTURER menu enter the password using the UP and DOWN buttons and then press ENTER this will access the manufacturer configuration branch select the MANUFACTURER PARAM menu use
62. ter tenete tette a netten enis 30 SUMMER WINTER CHANGEOVER e 33 13 1 Manual selection from user interface keypad sese tnter terere treten tentent tenen tentnnis 33 13 2 Manual changeover from digital input ID4 ssssssseeeee tnter teret tette tereti tentent tenens 33 13 35 Changeover from Supervisory SySIelTi 5 ce on e a o a e dU E NR Mni mid 33 13 4 Programmed changeover based on the calendar sse tente ttete tette tentat teen te tnt tetti tente toten tette ttn tate ttn ta tennis 33 13 55 Aut malicich ngeover 2 2 2 2 rn im a eim n uim i uim nid pd ud COR cias 34 MANAGEMENT OF THE DEHUMIDIFICATION FUNCTION coccion rr 34 141 Dehumidification ini cooling mode eee ttt tei an ee LR Le Hd e eH eH etes 34 14 2 Beh miditicationn heating mode cita e E RE Ee e e e E a RC e RUE te RUE RU te RU OR HERE UL Euntes 34 MANUAL MANAGEMENT OF an idend c erre 34 SUPERVISOR mc M n 35 16 15 Eistoft analogue Variables 3 9 51 B ei Da UE gina el ean a t a o eR eee ad 35 162 Listo nteger Variables rra me E D e EU UM a iaa ea 36 16 3 Uso aa cete re tenet aei eere ne nee Rech aee Hee Rer Here Hcet 36 AA In AA 37 17 41 A ON 37 17 2 O A NAS 37 1 Applications and functions performed by the software 1 1 Introduction The area controller
63. tic changeover IPN The changeover logic can be selected as follows press PRG the LED on the PRG button will come on and select the SERVICE menu select the SERVICE PAR menu and enter the password select the TEMP CONTROL menu use the UP and DOWN buttons to select the page corresponding to the selection of the operating mode season 6 f c 8 press ENTER to select the desired field use the UP and DOWN buttons to select the desired value press ENTER to confirm The main page on the user interface always displays the active operating mode whatever changeover mode has been selected 13 1 Manual selection from user interface keypad The operating mode can be selected from the user interface as follows e press PRG the LED on the PRG button will come on and select the SERVICE menu select the COOLING HEATING menu 6 6 press ENTER to select the desired field use the UP and DOWN buttons to select the desired operating mode press ENTER to confirm Alternatively from the main page e hold the ENTER button for at least 3 seconds until the operating mode changes 13 2 Manual changeover from digital input IDA In changeover from digital input is selected the corresponding electromechanical circuit needs to be wired When closing opening the contact the system changes the operating mode contact open heating operation contact closed gt cooling operation 13 3 Changeover from supervisory system If this logic is
64. tside temperature Set point for cooling heating pas D D es JD D D CEE 60 A Q e gt 6 f d Data logger reset Dies RW ER paraa Yo Me wa a o aoee S BEE EEE gt 6 f e Change password Enter new maintenance R W Enter new maintenance password 0 to 9999 password 6 9 Manual control password personnel er mmm LIH yy Pump 1 Pmp 1 RW 69 Fwemm2 LL Pup3 RW 9 wemm3 S y Wam W amp feam hec RW 9 Fewedle A LL Boe w e mete LL Deumdtyi RW e Fore dehumidiyinet O Dewidyz RW 69 Foroe defumidiyne2 Cid SC Deumiiy3 RT eo Foros dehumidiy ne Vi RW ewheiet 7 LLL Wt o RW 69 mewwie2 LL Mi RW jpeewiwies 1 LL Code 030221521 Rel 1 1 of 03 09 09 15 7 MANUFACTURER MENU button for 6 button terminal Enter maintenance EL Enter maintenance password Ri 0 to 9999 Ew p password 7 Use UP amp DOWN to select the fields in the menu and then press ENTER to access the selected menu a Configuration NoWaterines RW Tat foars T 353 L3 L Nozonesimet Am Tat_NunberctzoneineT gt Rozonesine RW Tat NumerozweWez 958 o Rozonesine RW et NumerotzmeWe3 958 9L uem mE ar n ps o I zone RW

Carel Application program for pCO3 AREA CONTROLLER FOR E

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