Purestream CWM User and Maintenance Manual
Contents
1. 8 2 3 8 2A CONGENSALIOY CON Ol cies hist al ene eee hier ine ee Bee ee 8 2 5 Control ot the Water temperature clade dla 8 2 6 Protecting the integrity of the mathie isrann A A E 8 2 7 CWM units identification Of the MAIN 9 2 7 1 CWIMOO2 Mesa cet ae ieee ae ee 9 2 7 2 CWIMO003 00G laa oe 10 2 7 3 CWMO08 0 li eased avers 11 3 0 12 SE PANS OUU 12 3 2 12 3 3 Place 12 2221 13 3 4 14 3 4 1 Recommended water system for 002 006 15 3 4 2 Recommended water system for 008 014 0 2 6 666 15 3 4 3 Use of ethylene glycol as a winter anti freeze 17 3 4 4 Charging the water Circuit 002 006 172. 46 15 0 5 47 4 User Manual July 2013 1 0 Safety rules 1 1 Definitions of the symbols used Read this use and maintenance manual carefully before performing any repairs on the chiller Warnings of a general character risk of danger or possibility of damaging the machine pay particular attention to the phrase following this symbol Risk of electrical danger the phrase highlights conditions that could be fatal Follow the instructions provided meticulously Risk of danger component system under pressure Risk of danger component or system that reach high temperatures during operation Risk of danger it is absolutely forbidden to use water to extinguish fires near or on the chiller fe xO Risk of danger it is absolutely forbidden to operate the machine with the panel open 5 Service that be performed by the 5 operator if qualified 1 Water input connection point Water output connection point Dispose of each type of material in accordance with the requirements of the country of use NOTE Phrases to be emphasized that do not contain safety rules This chiller has been carefully designed and constructed to be environmentally friendly L Refrigerants without CFC
3. BY FRIULAIR USER AND MAINTENANCE MANUAL Air cooled liquid chillers Cooling capacity 0 4 3 7 Tons scroll rotary and reciprocating compressors User Manual July 2013 Dear Customer Thank you for the trust you have placed in us Please read this manual carefully to obtain the best performance from our product In order to avoid incorrect operating conditions and danger for the operators it is essential that you follow the directions meticulously as well as the current accident prevention laws in the country of use Each CWM chiller is rigorously tested before being packed This verifies that there are no manufacturing defects and that the machine performs correctly the functions for which it was designed This manual must be kept for future reference and is an integral part of the chiller you have purchased Due to continuous technical development we reserve the right to make the necessary modifications without any obligation to give advance notice Do not hesitate to contact us if you have any problems or need more information The product identification plate located on the side of the chiller contains all essential information about the machine During installation fill in the table below copying the data on the identification plate You will have to give this data to the manufacturer or reseller whenever you request information replacement parts etc during the warranty period Removing or tamperin
4. Upper differential 1 C 1 8 F Dead zone 1 C 1 8 F Lower differential 1 C 1 8 F point Below this value In this interval the In this interval In this interval All the the compressors compressors are the compressors the compressors compressors are forced off to progressively that are on are are progressively on avoid the turned off as the kept on and turned on as the formation of ice temperature of the those that are off temperature of water decreases are kept off the water increases Numeric examples From 6 C 42 8 F to From 7 C 44 6 F to From 8 C 46 4 F to 7 C 44 6 F 8 C 46 4 F 9 C 48 2 F Above 9 C 48 2 F 3 C 37 4 F From 9 C 48 2 F to From 10 C 50 F to From 11 C 51 8 F to 10 C 50 F 11 51 8 12 C 53 6 F Above 12 53 6 3 C 37 4 F The set point of the water can be changed the other parameters differentials and dead zone remain constant and follow the set point value moving on the temperature scale see the numeric examples in the table above 27 User Manual July 2013 5 2 4 Changing the set point 003 014 WARNING if it was not specified during the proposal phase that the unit is required to produce water at temperatures near to 0 C 329 or below contact the company See section 7 3 Low water temperatures To change the set point of the exiting water proceed as
5. Accesses the menu Goes to the next menu level Goes to the mode for editing the selected parameter Confirms value entered for a parameter X ESC Accesses the list of active alarms When navigating the menus returns to the previous menu level pressed once When navigating the menus returns to the main page pressed several times Exits from parameter edit mode without saving the changes made When pressed for at least 5 seconds turns the unit on and off During menu navigation scrolls up through the menu items Increases the value of the parameter being modified Scrolls up through the alarm list 1 During menu navigation scrolls down through the menu items Decreases the value of the parameter being modified east down through the alarm list During the machine s operation shows the temperature of the water exiting the evaporator During navigation of the menu indicates the directory above the one where you are During changing of parameter indicates the value to be changed flashing COOLING icon Indicates that the machine is ON even when the compressors are stopped ALARMicon icon Indicates the presence of one or more active alarms Off compressor OFF On compressor ON Slow flashing compressor about to turn on Fast flashing compressor about to turn off PUMP icon Indicates the state of the pump more precisely Off pump OFF On pump ON Fast flashing pump about to turn off FAN icon Indica
6. 1 4 30 5 2 12 Table of alarm codes 003 014 30 6 0 SP Me 31 6 1 Calibration of the safety devices type 31 6 2 Rearming the high pressure pressure 46 4 60 0000 32 7 0 OPERATING HMI wade 33 TA Operating css 33 7 3 LOW Water temperature S nunn 36 7 3 1 Changing the setting of the anti freeze thermostat 003 014 36 7 3 2 Recommended glycol percentages for operating with low water temperatures 36 8 0 MAINTENANCE AND INSPECTIONS AND PERIODIC 5 0 2 444 74 4 37 9 0 TROUBLESHOOTING 38 DISMANTLING THE CHILLER 43 120 WATER CIRCUIT DIAGRAM S 44 13 0 REFRIGERANT CIRCUIT 5 200 200 1110000 45 14 0 DIMENSIONAL 5
7. be equipped with pumps with an oversized delivery head P5 2 3 Fan The fan forces air through the condenser fins to remove the coolant gas condensation heat therefore limiting the pressure inside the condenser CWM chillers are equipped with axial fans and have internal heat protection for the motor windings excluding model CWMO02 2 4 Condensation control When the ambient air temperature decreases air flow cooling capacity increases slightly causing a reduction in pressure inside the condenser to limit this decrease in condensation pressure from falling below acceptable limits for good cooling circuit operation the fan stops temporarily 2 5 Control of the water temperature The purpose of the chiller is to maintain the temperature of the water produced within a desired interval as the load on the system varies this is handled by an electronic controller and a temperature probe that turn the compressors on and off appropriately see also sections 5 1 3 and 5 2 3 2 6 Protecting the integrity of the machine In addition to controlling the temperature the electronic controller uses pressure gauges thermostats and timers to prevent and handle situations that could compromise the integrity of the machine also see Chapter 6 0 Safety Devices User Manual July 2013 2 7 CWM units identification of the main components 2 7 1 002 Filling inlet Level sensor optional Evaporator Fan control pressure gauge Power
8. LIExpanded foam insulation without CFC LlEnergy saving techniques L Reduced noise chiller and its packing materials are recyclable In order not to hinder our efforts the user is required to obey the simple ecological warnings indicated by this symbol 1 These are persons with the experience technical preparation and knowledge of standards and regulations who are qualified to perform the necessary actions and able to recognise and avoid possible dangers while handling installing using and maintaining the machine Sore User Manual July 2013 1 2 Warnings Only qualified persons may use and maintain electrically powered equipment Before commencing maintenance operations ensure no parts of the machine are live and it cannot be re connected to the electrical power supply The CWM chillers contain R134a CWM002 and R407C 003 014 refrigerant Operations on the cooling circuit must only be performed by specialist personnel with suitable equipment Any modifications to the machine or related operating parameters not previously verified and authorised by the Manufacturer may be hazardous and will invalidate the guarantee Do not use water to extinguish fires near or on the chiller 1 3 Proper use of the chiller CWM units are monobloc water chillers with air condensation They are intended for use in industrial process or air conditioning systems requiring chilled water Any other use is considered
9. the user must fit safety pressure relief devices User Manual July 2013 2 0 OPERATION AND MAIN COMPONENTS 2 1 Chilling circuit CWM chillers use a vapour compression cycle in a chilling circuit that essentially consists of the following components evaporator compressor condenser lamination device thermostatic expansion valve or capillary tube Evaporator heat exchanger co axial or braze welded to enable heat exchange between the water and the coolant liquid without them coming into contact with each other The water is cooled when it passes through the evaporator Compressor compresses the steam from the evaporator to send it to the condenser at a higher pressure Condenser finned pipe exchanger to enable heat exchange between the coolant and the air it creates coolant gas condensation which flows inside the pipes transferring the gas coolant condensation heat to the air which flows externally high pressure coolant liquid is thus produced Lamination device reduces the pressure of the liquid coolant coming from the condenser which is then sent to the evaporator In particular the thermostatic valve can modulate coolant flow such as to maintain continuous heating of the gas exiting the evaporator during various operating conditions and therefore guaranteeing gas flow without liquid parts inside the compressor Thanks to these components the vapour compression cycle works as follows the refrigerant liquid evaporate
10. ACQUA WATER OUTLET SERBATOIO ATMOSFERICO PRESSOSTATO DI BASSA PRESSIONE ATMOSPHERIC STORAGE TANK LOW PRESSURE SWITCH PRESSOSTATO DI ALTA PRESSIONE HIGH PRESSURE SWITCH FR RESA DI PRESSIONE OUTLET PRESSURE ET MANOMETRO GAUGE VALVOLA DI ESPANSIONE TERMOSTATICA THERMOSTATIC EXPANSION VALVE FILTRO DEIDRATATORE FILTER DRYER OPZIONALE SU CWM 002 CAPILLARE SU STANDARD OPTION ON CWM 002 CAPILLARY TUBE AS STANDARD NON DISPONOBILE SU CWM 002 NOT AVAILABLE ON CWM 002 OPZIONALE OPTION 008 014 HPS INGRESSO ACQUA WATER INLET CONDENSATORE CONDENSER USCITA WATER MER i G PRESSOSTATO DI BASSA PRESSIONE LOW PRESSURE SWITCH PRESSOSTATO DI ALTA PRESSIONE HIGH PRESSURE SWITC PRESA DI PRESSIONE OUTLET PRESSURE ESPANSIONE TERMOSTATICA THERMOSTATIC EXPANSION VALVE SIGAP CLASS O RHES TATORE 45 User Manual July 2013 DIMENSIONAL DRAWINGS mm 14 0 002 006 CWM003 14 lt Mit Ah Ah Aa Mr 8 6 014 CWM008 AA AA A 4214 46 July 2013 User Manual 15 0 DIMENSIONAL DRAWINGS inch CWMO002 CHARGE 4 843 7 933 DMS0528 CWM003 CWMO006 CHARGE a
11. as incorrect The manufacturer is not liable for damage resulting from inappropriate use in all cases the user is liable for any resulting hazards Proper use requires conforming to the installation conditions and limits of operation See sections 3 5 and 7 0 in particular e power voltage and frequency e pressure temperature of incoming water e water flow rate e surrounding temperature The chiller has been tested and completely assembled The user must only make the connections to other systems as described in the chapters that follow 1 4 Instructions for using equipment under pressure conforming to PED Directive 97 23 EC The proper use of equipment under pressure Is an essential prerequisite for ensuring safety To this end the user must proceed as follows 1 Use the equipment properly within the temperature limits shown in the operating limits stated on the manufacturer s name data plate 2 Do not solder on the exchangers or refrigerant fluid pipes 3 Do not install the equipment in insufficiently ventilated rooms areas exposed to sources of heat or near inflammable substances 4 During operation the equipment must not be subjected to vibrations that could cause fatigue failures 5 Keep the documentation attached to the equipment user manual declaration of conformity etc for future reference 6 The maximum working pressure stated on the manufacturer s data plate must be exceeded Prior to use
12. come as standard with a tank at atmospheric pressure pump and bypass it is advisable to also provide the water circuit with A mechanical filter for water in the machine inlet pipes with mesh no greater than 1mm Machine inlet and outlet taps Discharge tap at the lowest point of the system Inlet and outlet pressure gauges and thermometers for water from the machine to control its operation Diagram of recommended water circuit for CWM002 006 models DGT0019 3 4 2 Tap Mechanical filter System unit discharge Pressure gauge Cd Recommended water system for 008 014 CWM008 0014 units come as standard with a tank at atmospheric pressure pump expansion tank safety valve and automatic bleeder valve it is however advisable to also provide the water circuit with User Manual A mechanical filter for water in the machine inlet pipes with mesh no greater than 1mm Machine inlet and outlet taps a mechanical filter and a backflow valve on the filling line upstream of the feed tap an air bleeder at the highest point of the system a discharge tap at the lowest point of the system Inlet and outlet pressure gauges and thermometers for water from the machine to control its operation anti vibration pipe joints to prevent vibrations from being transmitted to the system In the case of water circuits of considerable capacity it is advisable to check if it is necessary to combine the existing expansion ta
13. is displayed press ENTER the text AIS is displayed with the current setting of the anti freeze thermostat alongside the factory setting is 3 0 Press ENTER again and the set value will begin to flash select the recommended value using the UP f and DOWN buttons see table in paragraph 7 3 2 Recommended glycol percentages for operating with low temperatures After selecting the value confirm it by pressing ENTER Exit by pressing X ESC several times until you return to the main screen 7 3 2 Recommended glycol percentages for operating with low water temperatures The table below shows the percentage of glycol required and the setting of the anti freeze alarm for each temperature of water produced Temperature of the water produced set point C 10 7 5s 3 o 2 5 Anti freeze alarm setting C aS ee ee ee ae Temperature of the water produced set point F Anti freeze alarm setting F ee i Percentage of ethylene glycol 30 30 30 2 20 5 5 0 AN CWM units can operate with water and ethylene glycol mixtures up to a concentration of 30 36 User Manual July 2013 8 0 MAINTENANCE AND INSPECTIONS AND PERIODIC CHECKS To keep the machine running properly and providing the guaranteed performance required it is necessary to make some periodic checks Operation Check that the temperature of the water produced is in the required Daily interval Check tank wat
14. the first week 3 It is not necessary to do this if the system has been charged with an anti freeze solution water and a suitable percentage of glycol see paragraph 3 4 2 Use of ethylene glycol as a winter anti freeze Attention Before carrying out any maintenance on the unit or accessing internal parts make sure you have cut off the electricity Attention The upper part of the compressor housing and the output pipe are hot Be especially careful when working near them 37 User Manual July 2013 9 0 TROUBLESHOOTING Possible alarm signal on the Possible cause electronic controller or other symptom A The unit does Contacts of the main Electronic Close the contacts not start differential switch are open controller off User switch is open controller off User switch in the or Electronic Move the switch to User REM position only controller on CW M008 014 No consent from the water Check the functioning User differential switch only of the pump bleed the CWM008 014 system Compressor timer active The compressor Wait 5 mins at the icon on the most display of the electronic controller is flashing No consent from the service System water at Apply a thermal load to thermostat temperature see the machine or lower display A the set point Symptom gt User User No consent from the AE1 Reset a temperature of User antifreeze thermostat the water set point compatible wit
15. 1 Connecting a remote on off switch A remote ON OFF switch can be installed using the terminal clamps on the switchboard terminal board as shown in the following table 2 Models 002 003 006 008 014 Not available X2 7 X2 8 X2 11 X2 12 Voltage Not available Consult the electrical diagram NB for 008 014 models any remote switch installed will be activated by putting the I O REM switch on the switchboard cabinet door in the REM position 3 5 2 Connection of a remote alert warning indicator A remote alert warning indicator can be installed using the terminal clamps in the switchboard cabinet as shown in the following table Models 002 CWMO003 006 CWMO008 014 Not available X2 9 X2 10 X2 14 X2 15 X2 16 Voltage Not available No Voltage Consult the electrical diagram 4 0 PRELIMINARY CHECKS AND START UP 4 1 Preliminary checks and preparation for the first start up Before starting up the unit it is a good idea to do the following 1 Check that the water shut off valves are open 2 Verify the regular water level in the tank for open water systems CW M002 006 3 Check the pressure shown on the gauge with the pumps stopped is approximately 1 bar for closed water systems 008 014 4 Check that the surrounding temperature is in the range for the machine to function see Chapter 7 0 Operating Limits 5 Check the disconnecting switch on the machi
16. 3 4 3 Charging the water Circuit 008 014 17 3 5 18 3 5 1 CONNECTING a remote ON OFF 20 3 5 2 Connection of a remote alert warning 20 4 0 PRELIMINARY CHECKS AND START UP 20 4 1 Preliminary checks preparation for the first 2 20 4 2 21 4 2 1 EWMOO 21 4 2 2 00 930065 na kd eee 21 4 2 3 22 4 3 23 5 0 24 5 1 24 5 1 1 Main functions of the CWMO02 electronic control 24 5 1 2 Turning the 0 2 ON 24 5 1 3 Controlling wa
17. R is displayed press ENTER the number indicating the parameter set version is displayed To exit press X ESC to return to the main menu 29 User Manual July 2013 5 2 10 Alarms CWM003 CWM014 An alarm condition is signalled by the Alarm icon 8 some alarms must be rearmed manually while for others the rearm is automatic or semi automatic Manual rearm these alarms must be reset which can only be done when the alarm condition no longer exists only then can the machine resume operation Automatic rearm the alarm is automatically deactivated as soon as the alarm condition ceases and the machine restarts by itself However the signal Alarm icon 8 remains on the display until the alarm code is displayed Semi automatic rearm semi automatic alarms behave like automatic alarms but if the same semiautomatic alarm occurs 5 times in 90 minutes that alarm becomes a manual alarm therefore to restart the machine you will have to remove the cause of the alarm and reset it 5 2 11 Displaying and resetting alarms CWM003 CWM014 The Alarm icon 8 turns on to indicate an alarm To display the code of the alarm that intervened press the X ESC button use the and DOWN buttons to display the codes of any other alarms that intervened at the same time To reset an alarm the condition that caused it must no longer exist For example if the low pressure gauge has intervened the alarm can only be reset when the press
18. User Manual July 2013 009 012 60Hz Tw out C 80 90 100 Tw out F CWM014 60Hz Tw out C 80 90 100 Tw out F 35 User Manual July 2013 7 3 Low water temperatures If it was not anticipated that the chiller unit offered was to produce water at temperatures close to 0 C 32 F or below you should contact our company To achieve temperatures that are negative or near zero it is necessary to use anti freeze ethylene glycol in percentages that depend on the desired temperature it is also necessary to change the calibration of the anti freeze thermostat NOTE The anti freeze thermostat can only be set at a high programming level for the electronic control unit contact the company 7 3 1 Changing the setting of the anti freeze thermostat CWM003 CWM014 Please ask our company for the password to change the parameters From the main screen press ENTER the word LOG is displayed press ENTER lt the text 0 is displayed enter the first of the four digits of the password using the and DOWN buttons then press ENTER do the same for the other three digits the word LOG is displayed Use the DOWN button to scroll the menu until the text PAr is displayed press ENTER the text GEN is displayed Use the DOWN button to scroll the menu until the text ALA is displayed press ENTER the text CFG is displayed Use the DOWN button to scroll the menu until the text ALA ICE
19. a hn Mir Aa Mr Mr 4 84 7 933 N jen OUT 57 638 47 User Manual July 2013 PURESTREAM CWM CHILLERS BY FRIULAIR CAG Purification Inc 3770B Laird Road Unit 2 Mississauga Ontario L5L 0A7 Phone 1 800 951 0777 Fax 905 820 3490 info chillers cagpurification com web www cagpurification com User Manual July 2013
20. an the set value the compressor will start up Turn off the unit by holding the T 3 key on the electronic control unit for more than 5 seconds the electronic control unit will first switch off the compressor then shortly after the pump WARNING it is important not to turn off the unit using the main power switch or disconnecting switch on the machine switchboard as this could cause a delayed switch off of the pump with respect to the compressor which could damage the evaporator 21 User Manual July 2013 4 2 3 008 014 Startup On closing the disconnecting switch the electronic control unit will display OFF To proceed with startup 1 Put the On Off Remote 1 0 Rem switch on the switchboard cabinet door in position 1 2 Turn on the unit by pressing 3 on the electronic control unit for more than 5 seconds The icon 7 will light up on the display 8 5 9 3 1011 4 003 014 electronic control unit 3 Check the alert symbol 8 does not appear on the electronic control unit if it does appear press the X ESC 2 key to see which type of alert has been flagged WARNING on first starting up an alert could occur in relation to an error sequence in the R S T phases shown by the code ACO on pressing the X ESC 2 key This safety system safeguards the compressor from the possibility of turning in the wrong direction Should this occur open the main power switch upstream of the machine and inver
21. ble e Use wires of the section shown on the electrical diagram and in the following table CWM003 CWMO06 switchboard 01 02 03 Pepe TT 7 7777777 TIAA aac 55999555 MEAS 7 20 rrr eee csse eos HENE u eor gt ee v P 1 ESP0536 N Description Disconnecting switch Relay switch KHP KCC KCP Condenser of the compressor Terminal boards A1 A2 18 User Manual July 2013 Electrical panel 008 014 02 03 04 01 05 i 06 07 08 ESP0534 Description Cut off switch 2 Compressor and pump protections Relays Transformer Phase sequence control relay RPP Compressor and pump remote switches KC1 KP1 Terminal strip A1 A2 Attention Never change the internal electrical connections as the warranty will be immediately voided Important Screw the wires solidly to the terminal strip of the cut off switch and lock the wire with a cable gland Important Make the cable entering the machine enters the cable gland from below this prevents rain from dripping inside the machine Important The earth connection is obligatory connect the earth wire to the terminal provided in the electrical panel The ground wire must be longer than the other wires so that it will be the last one to be pulled if the device holding the cable loosens 19 User Manual July 2013 3 5
22. board for our technicians are excluded The warranty excludes any liability for direct or indirect damage to persons animals and or property that are caused by incorrect use or inadequate maintenance and is exclusively limited to manufacturing defects The right to service under the warranty is secondary to your faultless observance of the installation use and maintenance instructions in this manual The warranty will be voided immediately if the chiller is modified or tampered with even slightly When requesting warranty service you must provide the data on the product s identification plate User Manual July 2013 Summary 142 NCS hate artnet eck celia 5 5 1 2 WAENDE 6 1 3 Proper ive dae 6 1 4 Instructions for using equipment under pressure conforming to PED Directive 97 23 EC 6 2 0 OPERATION AND MAIN 5 1 7 ee ee ee ee 7 2 2 WAST CUCU ati siete cite tics etter tence
23. ck the chiller circuit with a leak detector Repair any ruptures and recharge the circuit Reduce the flow capacity of the water by closing the output tap of the pump a little bit Rearm the thermomagnetic protection of pump QP 1 Look for a short circuit in the winding of the pump motor Check for possible over absorption of current due to too low voltage check the power supply voltage Check water flow rate see section 7 2 Open the system tap fully If possible reduce system feed leaks If possible add a pump in series with suitable head Specialized personnel Specialized personnel Specialized personnel July 2013 10 0 DISMANTLING THE CHILLER If the chiller is being dismantled you must separate it into parts of homogeneous material The following table lists the main materials of the various components of the machine Refrigerant fluid R134a CWMO002 R407C Oil Panelling and supports Carbon steel epoxy paint Chiller compressor Steel Copper Aluminium Oil Steel Copper o O Plate exchanger evaporator 008 014 Steel Copper Coaxial exchanger evaporator CWM002 006 Copper Aluminium Carbon Steel Pipes Rame Fan Aluminium Copper Steel Valves Steel Bronze Polyurethane Pump Tank Electrical wires Copper PVC Electrical parts PVC Copper Bronze We recommend that you follow current safety norms for the disposal of each single material The refrigerant contains
24. ducer High pressure fitting Level sensor optional Compressor ESP0533 Coolant pressure gauges Water inlet Water pressure gauge Plate evaporator Thermostatic expansion valve Water bypass Tank Water output Water discharge Fan Pump Coolant glass warning light Coolant filter Condenser Switchboard 4 25 5 0532 11 User Manual July 2013 3 0 INSTALLATION 3 1 Transport The units are supplied packed in a cardboard box on a wooden pallet After checking that the packing is undamaged position the unit near the installation site and unpack it Always keep the chiller vertical turning it upside down can irreparably damage several parts of the unit Handle with care Violent falls can cause irreparable damage The centre of the machine is approximately its centre of gravity In any case when handling the machine with a forklift truck or pallet jack always check its stability before lifting 3 2 Storage Protect the machine from bad weather even if packed Always keep the chiller vertical even when in storage Turning it upside down can irreparably damage several parts of the unit If not used the chiller can be stored packed in an enclosed place free of dust with a maximum temperature of 50 C 122 F and specific humidity of no higher than 90 wes 3 3 Place of installation The packing material is recyclable Dispose of each type of material in accordance w
25. e high pressure pressure switch is the only case in which in addition to manually rearming the electronic controller it is also necessary to reset the pressure switch itself The high pressure pressure switch is located in the compressor compartment on the uninsulated copper pipe that goes from the compressors to the condensation batteries there is a manual reset button on top of it This can only be rearmed when the pressure in the circuit has fallen below the reset value see table Calibration of the safety devices and type of in paragraph 6 1 Warning The upper part of the compressor casing and discharge pipe are at a high temperature Be especially careful when working in their vicinity For this reason when dealing with an intervention of the high pressure switch it is necessary to A identify the cause of the rise in pressure fans not working condensation batteries dirty or obstructed obstacles to the flow of exiting air operating temperature outside operating limits etc also see Chapter 9 0 Trouble shooting and remove the cause if possible B wait until the high pressure manometer falls below the reset value see the table Calibration of the safety devices and type of in paragraph 6 1 C rearm the pressure switch by pressing the red button if you do not hear a click it is not rearmed D then rearm the electronic controller press X ESC once alarm code AH1 or 2 is display
26. e machine until the water reaches the required level near the transparent level indicator see diagram When the pump starts check the level again and top up if necessary e Check for any leaks by examining the circuit LGT0046 3 4 3 Charging the water circuit CWM008 014 Check that the drain taps are turned off Open all the system s bleed valves Turn the system s shut off devices e Start filling by slowly turning on the system s water charging tap e When water starts coming out of the bleed valves close them and continue charging until the manometer shows at least 1 bar 15 psi e Check for any leaks by looking at the manometer and inspecting the circuit 17 User Manual July 2013 3 5 Electrical connections The machine must be connected to the electricity following the electrical diagram and conforming to the current laws and regulations in the place of installation e The voltage frequency and number of phases must conform to the data shown on the machine s identification plate The power supply voltage must not vary by more than 10 from its nominal value L The frequency must not vary by more than 1 from its nominal value 2 for brief periods e The imbalance between power phases must be lt 2 e Upstream from the electrical panel install a differential gauge IDn 0 03A main power switch and slow blow fuses with the specifications shown on the electrical diagram and in the following ta
27. ed Then press it again and hold it down for at least 5 seconds LGT0045 High pressure switch Attention the high pressure gauge stops the compressors while it keeps the condenser fans running to lower the pressure in the condensers 32 User Manual July 2013 7 0 OPERATING LIMITS 7 1 Operating temperatures The various units in the CWM line guarantee several operating limits depending on the model and accessories provided The graphs show the limits for continuous operation of the CWM units in relation to the temperature of the water exiting the machine Tw and the temperature of the external air Ta mixtures and the setting of suitable electronic control unit parameters Contact the company see WARNING produced water temperatures less than 5 C 41 F require the use of glycolate section 7 3 condensation control and continuous fan speed control optional only with 008 014 WARNING external air temperatures lower than 0 C 32 F can only be achieved with Key Operation with glycolate water contact the company Operation with condensation control only CWM008 014 CWM002 50Hz CWMO002 60Hz 30 40 50 60 70 80 90 100 Tw out Tw out F 33 User Manual July 2013 003 006 50Hz 003 006 60Hz 80 90 100 Tw out F 90 100 Tw out C Tw out F Tw out C 80 100 90 Tw out F 34
28. er and confirms with ENTER lt To return to the main screen press X ESC four times 5 2 6 Changing the serial address MODBUS and CAN CWM003 CWM014 If you are installing serial network with several devices it may be necessary to change the serial address of the electronic controller which is set to 1 at the factory From main screen press ENTER lt Using the DOWN button go the PAR menu Press ENTER lt In the PAR GEN menu press ENTER lt Use the DOWN arrow to scroll to the GEN SER menu and press ENTER the current serial address is displayed From the SER menu press ENTER the current value will flash Use the UPT and DOWN arrows to set the desired value To return to the main screen press X ESC four times 28 User Manual July 2013 5 2 7 Display of inputs and outputs CWM003 CWM014 It is possible to display the analogue and digital outputs to check the operation of the machine and its main components From the main screen press ENTER lt Use the DOWN button to move the I O menu From here press ENTER to access the I O Od menu Press ENTER using the and DOWN buttons you display all the values of the analogue and digital inputs and outputs Press X ESC again until you return to the main screen The following values can be displayed Al 1 analogue input Temperature at the entrance of the machine Al 2 analogue input YY Temperature at t
29. er level using level indicator see section 3 4 2 Daily only units with open water circuit Check for the presence of any alarm signals Check the functioning of the fans Monthly Check the pressure of the water circuit with the pump stopped Monthly verify that it is about 1 bar 15 psi Check that the temperature of the air is compatible with the Monthly operating limits of the machine Clean the air filters only 008 014 Monthly Clean the condensation batteries with a jet of compressed air Clean the water filter Monthly Check that the refrigerant liquid peep hole is clear or at most with Every 6 months a few bubbles check with the compressor running only 008 014 Check that the subcooling and superheating values Every 6 months 2 respectively between 3 5K 5 4 9 and 5 7K 9 12 6 F Check for traces of oil on the pipes of the chilling circuit symptom ee ae of refrigerant leaks electrical panel on the terminal strips of the compressors deterioration replace them values on the identification plate If the unit will not be used for a long time drain the water from the Extraordinary pipes and the machine to avoid the formation of ice during the winter 1 It may be necessary to carry this out more frequently in the case of particularly dirty environments 2 We recommend an extraordinary cleaning of the filter after the machine has been operating for
30. follows from the main screen press use the DOWN Jbutton to go to the PAR menu Press ENTER and use the DOWN Jbutton to go to the REG menu Press ENTER lt In the REG SET menu press ENTER and the set point will be displayed To change it press ENTER and the value will flash Use the UP DOWN J buttons to set the desired value To confirm it press ENTER To exit without saving it press X ESC Press X ESC again until you return to the main screen 5 2 5 Changing the type of restart after a power failure CWM003 CWM014 In the case of a power failure the chiller can behave in three different ways when power is restored e stay off e start e return to the same condition it was in when the power failed To select one of these options proceed as follows From the main screen press ENTER Use the DOWN 1 to go to the PAR menu Press ENTER Go to the GEN menu Press ENTER to dSP menu Use the DOWN 110 go to the STU menu press ENTER In the YO2 menu the type of restart currently set will be displayed which be of the following e EQUA when the power returns the machine will work in the same way as before the power failed e ON when the power returns the machine will start e OFF when the power returns the machine will stay off To change the type of restart press ENTER the parameter begins to flash Use the DOWN buttons to select the desired paramet
31. g with the identification plate will void the warranty Example FRIULAIR 222 Chillers UDINE ITALY Model CWT7 Serial No 110002800 Code CWT007CQ1R000 Nominal Capacity 5 KW Refrigerant circuit DN 20 R410A 1 0kg PS HP42 LP29bar TS 10 120 C Water Circuit V 85 0 liter PS 3bar TS 10 30 C Electric 3 400V 10 0 50Hz 25A 2KWI3 4A 2 IP 44 Diagram 547800003 00 Complete unit PED S7 23 EC Art 3 3 Fluid Group 0 Ambient temperature 15 1 50 C Hermetically Sealed Contains fluorinated gases covered by the Kyoto Protocol Manufactured FEB 2011 Ewo Fill in this identification plate FRIULAIR 7 2 Chiller E 3 5525 Nominal Capacity kW Refrigerant circuit 1 5 Water Circuit V liter PS an bar TS ESA Electric Waa HZ KW 25 Complete unit PED 97 23 Fluid Group Ambient temperature 15 Hermetically Sealed Contains fluorinated greenhouse gases covered by the Kyoto Protocol 6 Warranty conditions For 12 months from the commissioning date and no more than 14 months from the shipping date any parts that were originally defective will be repaired or replaced at no charge Expenses for transport and travel room and
32. h the calibration of the antifreeze thermostat see table in paragraph 7 1 2 Service and anti freeze probe A7b Check contacts and Specialized defective replace if necessary personnel 5 Entering water temperature A7A Check contacts and Specialized probe defective replace if necessary personnel G Intervention of the main Electronic Look for current Specialized differential switch controller off leakage inside the personnel machine G 38 User Manual July 2013 B The Compressor doesn t start C Intervention of the high pressure pressure switch User Manual Possible cause Intervention of the thermal protection inside the compressor Magnetothermic protection of the compressor open QC1 only CWM008 01 4 Intervention of the phase sequence relay only CWMO008 014 Contactor of the compressor off only CW M003 01 4 Condenser obstructed or insufficient air flow capacity The unit has operated outside its operating limits such as air or water too hot Possible alarm signal on the electronic controller or other symptom The contactor of the compressor is on but the compressor is stopped The compressor icon is on but the compressor is stopped AHO only CWM003 014 AHO only CWM003 014 39 Wait for cooling check that the compressor is working under normal conditions Check for insufficient refrigerant in the circuit see point Look for
33. he exit of the machine DI 1 digital input 1 oy ae Chiller on off from run stop switch 1 0 gt O ont of 1 O ont of 0 0k DI 2 digital input 2 High pressure pressure gauge 1 pressure gauge 0k DI 3 digital input 3 Low pressure pressure switch circuit 1 pressure gauge Water differential pressure gauge CWM008 01 4 O ok DI 4 digital input 4 Water level protection 003 014 opz 1 device intervention O ok DI 5 digital input 5 Compressor and or phase sequence protection protection intervention O ok DI 6 digital input 6 Water level and or pump and or fan protection protection intervention DO 1 digital output 1 v Alarm present 2 1 alarm O off DO 2 digital output 2 v v Compressor Eo 0 oi DO 6 digital output 6 n O o Key n u not used Opt optional 5 2 8 Displaying the software release version of the electronic controller CWM003 CWM014 From the main screen press ENTER lt Use the DOWN button to go to the SER menu Press ENTER From the SER INF menu press ENTER and here you can display the version of the software release installed in your controller Press X ESC again until you return to the main screen 5 2 9 Displaying the parameter set version CWM003 CWM014 From the main menu press Enter using the Down 4 key go to menu PAr press ENTER in the GEN menu press ENTER dSP is displayed press ENTER PA
34. int Set Point Temp acqua Differenziale 24 User Manual July 2013 5 1 4 Changing the set point CMW002 Press key 1 for at least half a second to display the setpoint value Keeping key 1 pressed use keys 2 and 3 LA to set the required value On releasing key 1 the new setpoint value will be stored 5 2 CWM003 CWM014 electronic control unit 10 11 4 003 014 electronic control unit The electronic control unit has a 7 segment display and a series of icons and manages e compressor operation to ensure temperature control of the water produced e pump operation fan speed control only CWM008 CWM014 displays unit status icon 7 compressor status compressor icon 9 fan status fan icon 11 pump status pump icon 10 temperature of water produced 5 all digital analogue inputs outputs parameter navigation via the display displays the following alerts water differential pressure gauge only 008 014 high pressure gauge low pressure gauge optional 003 006 antifreeze compressor protection wrong R S T phase sequence only 008 014 pump and fan protection only 008 014 insufficient water level in tank optional pressure and temperature probe fault 25 User Manual July 2013 5 2 1 Main functions of the electronic controller buttons and meanings of the icons CWM003 CWM014
35. ith the requirements in the country of use Warning The CWM002 model is intended for indoor installation only All other CWM units can be installed indoors or outdoors To determine the best place to install the unit it is important to consider the following aspects e the dimensions and source of the water pipes e the location of the electricity the solidity of the support surface e avoid any obstacles to the flow of the fan which could cause the recirculation of air to the condenser avoid the possible reflection of sound waves do not install in narrow or tight spaces provide access for maintenance or repair see paragraph 3 3 1 Installation spaces e Average air temperature in the chosen installation area see Section 7 0 Operating limits Attention if the machine is installed outside it could find itself at a temperature lower than 0 C 32 F when stopped the formation of ice could damage the evaporator If you do not intend to drain the machine during the winter you must add anti freeze to the water circuit see paragraph 3 4 2 Use of ethylene glycol as a winter anti freeze 12 User Manual July 2013 3 3 1 Installation spaces To ensure the good functioning of the unit and access for maintenance you must respect the minimum installation space shown in the figure in this paragraph The exit of air from the fans must not be obstructed In any case avoid all situations in which hot air can ci
36. ne switchboard is open 6 Check that the run stop switch 1 the electrical panel is in the 0 position only for CWM008 014 models 7 Check that the mains voltage matches the voltage on the machine s identification plate with a tolerance of 10 8 Close the main power supply switch 9 Close the cut off switch on the machine s electrical panel 20 User Manual July 2013 4 2 Startup 4 2 1 CWMO002 Startup On closing the switch the pump will start up and the electronic control unit will display OFF to start the refrigerator hold key 4 down for more than 5 seconds The controller will display the temperature of the water inside the tank if it is higher than the set value the compressor will start up B00 1 2 3 4 002 electronic control To turn off the compressor hold key 4 down for more than 5 seconds the pump will continue operating To stop the pump as well use the switch at the side of the electronic control unit 4 2 2 CWMO003 006 Startup On closing the disconnecting switch the electronic control unit will display OFF To proceed with startup 1 Turn on the unit by pressing UP 3 on the electronic control unit for more than 5 seconds The icon 7 will light up on the display 8 5 10114 003 014 electronic control 2 Check pump startup icon 10 lit up on the display 3 The display will show the temperature of the water inside the tank if it is higher th
37. ng the refrigerator Enables the required temperature of the water produced to be set set point Enables compressor activation and deactivation standby Controls on off compressor operation depending on the temperature of the water measured with the set point and upper differential 3 C 3K 5 4 F e Guarantees minimum compressor on off times to maintain its integrity e Signals any faults in the temperature probe with the code OR simultaneously turning off the compressor 5 1 1 Main functions of the CWM002 electronic control keys Displays the set point value Setpoint key Enables setting of the set point used along with keys 2 and 3 Enables the decrease of the set point value used along with key 1 Down a Enables the increase of the set point value used along with key 1 Up key Activates deactivates the compressor when held for more than 3 seconds 5 1 2 Turning the 002 on and off To enable compressor operation hold the 4 key down for more than 3 seconds to disable it repeat the same action the fan and pump operate independently from the electronic control unit and can be stopped via the main switch 5 1 3 Controlling water temperature CWM002 00275 electronic control unit regulates the temperature on the basis of a set point value and upper differential of 3 C 5 4 F according to the following diagram Compressore ON Compressore OFF Set Po
38. nk on the unit with an additional tank The capacity of the expansion tank provided with the CWM008 014 models is 5 1 32 gallons 15 July 2013 Diagram of the recommended waiter circuit for the CWM008 014 models ey Tap 16 Thermometer Anti vibration joints __8 02 11 Pressure gauge 11 Expansion tank if required Important During winter downtime empty the system or just the refrigerator to prevent damage from the cold Any residual water inside the pump 008 014 must be discharged using the relevant screws on the upper part of the archimedean pump screw see diagram Archimedean pump screw 570044 16 User Manual July 2013 3 4 3 Use of ethylene glycol as a winter anti freeze Instead of emptying the system in the winter you can charge the system with a mixture of water and a Suitable percentage of ethylene glycol chosen as a function of the lowest expected temperature of the outside air Percentages of ethylene glycol recommended as a function of the expected temperature of the outside air Outside air temperature C _0 5 10 12 15 Outside air temperature F 10 2 Percentage of ethylene glycol AN Attention Maximum concentration of ethylene glycol allowed 30 3 4 4 Charging the water circuit CWM002 006 e Check that the drain taps are turned off e Open the system interception devices e Feed the water from the filling inlet above th
39. nnel only 008 014 with regulator and replace optional condensation if necessary control Intervention of the thermal AP1 Check that the working protection inside the fan only 008 conditions of the only 003 014 014 machine outside air temperature are compatible with the operating limits Wait for the fan motor to cool Electrical connections of the Fan icon on and Check and tighten Specialized fan loose fan stopped only personnel CW M008 014 41 User Manual July 2013 Symptom G The unit is working without ever stopping High overheating low undercooling H Compressor intake pipe covered with frost 1 The pump doesn t start Magnetothermic protection of the pump open J The unit stops and starts repeatedly water temperature changes suddenly User Manual Possible cause Excessive thermal load No refrigerant Excessive water flow capacity the pump is absorbing too much current Short circuit or overcurrent Insufficient water flow rate Possible alarm signal on the electronic controller or other symptom and high output temperature of the compressor Traces of oil on the chilling circuit 1 only 008 014 1 only 008 014 42 Reduce the thermal load Reduce the temperature of the incoming water and or the flow capacity of the exit tap of the unit little See point H Che
40. ontroller 4 start ups Key n a not available Opt optional When they reach their calibration value most of the security devices trigger an alarm managed by the electronic controller 6 1 Calibration of the safety devices and type of rearm Intervention of 2 Safety device valde Reset value 2 30 20 barg 23 14 barg Manual High pressure gauge 435 290 psi 333 203 psi Manual 1 7 barg 25 psi 2 7 barg 39 psi n a Water differential pressure gauge 18 mbar 0 25 psi 25 mbar 0 36 psi n a Anti freeze thermostat 3 C 37 4 6 42 8 For some safety devices once the cause of the alarm times out the machine resumes operation automatically as soon as the reset value is reached Others must be manually reset to restart the machine also see paragraph 5 2 10 The following paragraph lists the characteristics of each safety device gt O CWM 008 014 Water safety valve 6 barg 87 psi os emiautom 5 gt l3 O lt lt lt Water level sensor Opt po Anti circulation timer pe e 002 values e This is a function of the electronic controller that prevents the same compressor from stopping and starting too frequently at least minutes must elapse between one compressor s power up and the next 31 User Manual July 2013 6 2 Rearming the high pressure pressure switch The intervention of th
41. particles of lubrication oil from the chiller compressor Dispose of refrigerant properly Remove it from the chiller with suitable tools and deliver it to authorized collection centres that will treat it and make it reusable 43 User Manual July 2013 12 0 WATER CIRCUIT DIAGRAMS CWM002 CWMO006 INGRESSO ACQUA WATER INLET USCITA ACQUA WATER OUTLET SCARICO SERBATOIO STORAGE TANK DRAIN CWM008 CWM014 INGRESSO ACQUA WATER INLET USCITA ACQUA WATER OUTLET SCARICO SERBATOIO STORAGE TANK DRAIN User Manual SERBATOIO STORAGE TANK INGRESSO REFRIGERANTE REFRIGERANT INLET USCITA REFRIGERANTE 7 REFRIGERANT OUTLET SERBATOIO ATMOSFERICO ATMOSPHERIC STORAGE TANK VASO DI ESPANSIONE EXPANSION VESSEL OMETRO AUGE VALVOLA DI RITEGNO CHECK VALVE VALV DI SICUREZZA SAFETY VALVE 44 SENSORE DI LIVELLO AAA NALE LEVEL SENSOR OPTI SONDA DI TEMPERATURA TEMPERATURE PROBE 7 USCITA py REFRIGERANT O INGRESSO REFRIGERANTE REFRIGERANT INLET SENSORE DI LIVELLO for LEVEL SENSOR OPTIONAL SONDA DI TEMPERATURA TEMPERATURE PROBE PRE TATO DIFFERENZIALE DI NTIAL PRESSURE SWITCH POMPA PUMP VALVOLA DI SFIATO RELIEF VALVE July 2013 13 0 REFRIGERANT CIRCUIT DIAGRAMS 002 006 EVAPORATOR COMPRESSORE VENTILATORE INGRESSO ACQUA WATER INLET CONDENSATORE CONDENSER USCITA
42. rculate between the output of the fans and the intake of the machine Contact our office to verify feasibility in all cases where one of the preceding conditions cannot be met LGTO042 0 8 m 31 5 inches 13 User Manual July 2013 3 4 Water connections Connect the machine to the water pipes following the instructions located near its water fittings see figures The installation of outlet and inlet taps on the machine is recommended which will enable machine maintenance without emptying the entire system and emptying of the machine only during winter downtime Important Install the mechanical water filter provided with the machine on its input scum and impurities can seriously damage the evaporator We recommend an extraordinary cleaning of the mechanical water filter after the machine has been running for the first week also see Chapter 8 0 Maintenance and periodic inspections Water input to the machine Il Water exit from the machine LGT0043 Warning No naked flames should be used during water connection operations in the vicinity of or inside the unit NOTE It is a good rule that the diameters of the arriving and departing pipes be not less than the water fittings Diameters of the water fittings CWM models 002 006 008 014 Diameter of the in out water fittings 1 2 FM 14 User Manual July 2013 3 4 1 Recommended water system for 002 006 CWM002 006 units
43. s in the evaporator chilling the water the refrigerant vapours are then aspirated from the compressor which compresses them and sends them to the condenser under high pressure here thanks to a flow of forced air from the fans the high pressure refrigerant gas is cooled making it condensed and undercooled The flow of refrigerant liquid then passes through the lamination valve thermostatic expansion valve which drastically reduces its pressure the refrigerant liquid returns to the evaporator at a reduced pressure where it again evaporates taking heat from the water The chilling circuit also includes a water pump which ensures the flow of water to be chilled by evaporation and the fan which ensures the condenser is cooled User Manual July 2013 2 2 Water circuit The water circuit mainly consists of a pump evaporator tank bypass calibrated between the pump discharge and the system backflow pressure gauge on the pump discharge and level sensor optional The water flows into the evaporator first where it is cooled then into the tank and is then suctioned by the pump which sends it to the system see water diagrams section 12 0 CWM002 006 models have an open circuit with a tank at atmospheric pressure CWM008 014 models have closed circuit with a pressurised tank these models are also equipped with a differential pressure gauge to protect the evaporator automatic air bleeder valve safety valve and expansion tank Units
44. short circuits in the motor windings of the compressors Check for possible over absorption of current due to too low voltage combined with operating conditions near the limits check the power supply voltage and operating conditions Reverse the two phases upstream from the cut off switch of the unit s electrical panel see paragraph 4 2 3 Check the voltage at the coil of the remote switch of the compressor and the continuity of the coil itself Remove dirt from the condenser and any obstacles to the flow of air Wait for the pressure to drop below the reset value then rearm the high pressure pressure switch by pressing the button on top of it see figure in paragraph 6 2 If possible restore conditions that are compatible with the operating limits Reset the high pressure switch paragraph 6 2 Specialized personnel 96 Specialized personnel 96 Specialized personnel Specialized personnel User July 2013 Continued C Intervention of the high pressure pressure gauge D Intervention of the water differential pressure switch User Manual Possible cause Fan not working Excessive refrigerant charge Presence of air or incondensable gas in the refrigerant circuit Refrigerant filter clogged or thermostatic valve stuck Water circulation pump blocked or defective only CWMO008 014 Circulation pump stopped Possible alarm signal on the electronic controller or o
45. supply cable Low pressure fitting High pressure fitting High pressure fitting Water bypass Switch Electronic control unit am a an a a a eno ee cr ESP0529 Water inlet Tank Water level indicator Water outlet Coolant pressure gauges optional Water discharge Pump Water pressure gauge Fan Coolant filter Condenser Compressor Low pressure fitting TSS 959 CIS ae FH FF ESP0528 User Manual July 2013 2 7 2 003 006 Filling inlet Thermostatic expansion valve High pressure gauge Level sensor optional Evaporator Low pressure gauge optional Fan control pressure gauge Low pressure fitting High pressure fitting Water bypass Electronic control unit Disconnecting switch Switchboard Water inlet Coolant pressure gauges opt Water level indicator Tank Water pressure gauge Water outlet Electrical power inlet Water discharge Pump Coolant filter Fan Condenser Compressor ESP0530 10 User Manual July 2013 2 7 3 CWM008 014 Disconnecting switch Electronic control unit On Off remote switch Expansion tank Differential water pressure gauge Water safety valve Electrical power inlet Low pressure gauge Low pressure fitting High pressure gauge Pressure trans
46. t two phases between them immediately downstream of the main switch itself WARNING do not interfere with cabling downstream of the unit switchboard disconnecting switch at any time as doing so could compromise the correct sequence of other devices such as the pump or fans Repeat operations from point 1 4 Check the pump has started pump icon 10 lit up on display possibly by checking the pressure of the water upstream and downstream of the machine on the previously installed pressure gauges 5 Wait for the electronic control unit to verify continuity of water flow via the signal of the differential pressure gauge if the differential pressure gauge intervenes alert code A03 on pressing the X ESC 2 key bleed the system check the interception taps are open and pump operation then reset the alert flag by pressing the X ESC 2 key for 5 seconds 6 The display will show the temperature of the water inside the tank if it is higher than the set value the compressor will start up 22 User Manual July 2013 Turn off the unit by holding the T 3 key on the electronic control unit for more than 5 seconds the electronic control unit will first switch off the compressor then shortly after the pump Alternatively once the machine has been switched on via the electronic control unit it can be switched on off using the ON OFF switch 1 on the switchboard cabinet door WARNING it is important not to
47. ter temperature 002 1 24 5 1 4 Changing th set point CMWOO2 25 5 2 003 014 electronic control 0 0000 1 25 5 2 1 Main functions of the electronic controller buttons and meanings of the icons 003 014 26 5 2 2 Turning and Off 1 27 5 2 3 Controlling water temperature 003 014 27 5 2 4 Changing the set point 003 014 2 28 5 2 5 Changing the type of restart after a power failure 003 014 28 5 2 6 Changing the serial address MODBUS CAN 1 4 28 3 User Manual July 2013 5 2 7 Display of inputs and outputs 003 014 0000 0 0000 0 29 5 2 8 Displaying the software release version of the electronic controller CWMO003 CWM014 29 5 2 9 Displaying the parameter set version 1 4 29 5 2 10 CUMO03 CWM014 sccsscssccssonssssccuconssssceuconsessceucouseusesscoussssesscoussssesscoussssensonucs 30 5 2 11 Displaying and resetting alarms
48. tes the state of the fans On fans ON Off fans OFF COMPRESSOR icon They indicate the state of the compressor and more precisely 26 User Manual July 2013 5 2 2 Turning and off CWM003 CWM014 To turn the unit on hold down the UP button 3 for more than five seconds To turn the unit off hold down the button 3 for more than five seconds Optionally once the machine has been turned on using the electronic controller it can be turned on and off from the run stop switch 1 on the door of the electrical panel 5 2 3 Controlling water temperature CWM003 CWM014 The machines have a temperature probe at the exit from the evaporator based on this temperature the electronic controller starts and stops the compressors to keep this temperature as close as possible to the temperature set point The electronic controller regulates the exit temperature of the evaporator using a dead zone system this system is based on three temperature intervals lower differential dead zone upper differential and two temperature values the set point and anti freeze All these values are distributed on the temperature scale as shown in the figure Attention the run stop switch has precedence over the UP button 3 after turning the machine office from the run stop switch it will not be possible to restart it with the f UP button 3 on the electronic controller
49. ther symptom AHO only 003 014 High subcooling greater than 10K 18 F Presence of bubbles on the flow peep hole also with subcooling values greater than 5 K OF Pipe downstream from the component covered with frost A03 only CWM008 014 AO3 only CW M008 01 4 Pump icon lit 40 Drain excess gas Drain the circuit create vacuum and recharge Check and replace Unlock or replace the pump Check the voltage at the coil of the contactor of the pump and the continuity of the coil itself Specialized personnel Specialized personnel Specialized personnel Specialized personnel Specialized personnel July 2013 Possible alarm signal on the Symptom Possible cause electronic controller or other symptom E Intervention of Coolant filter clogged or Pipe downstream Check and replace Specialized the low pressure thermostatic valve stuck from the personnel switch component covered with frost ALO only 008 014 optional with 003 Insufficient refrigerant charge ALO See point H only 008 014 optional with 003 006 F Fan doesn t start Very low outside air Fan icon off The machine can temperatures and Condensation working anyway consequent intervention of pressure normal the condensation control No voltage output from the Fan icon on and Check the voltage Specialized fan speed regulator fans stopped output from the perso
50. turn off the unit using the main power switch or disconnecting switch on the machine switchboard as this could cause a delayed switch off of the pump with respect to the compressor which could damage the evaporator WARNING the 1 0 REM operating switch has precedence over the UP 3 by turning off the machine using the 1 0 REM operating switch it will not be possible to start it again using the UP T 3 key on the electronic control unit 4 3 Start up under critical conditions lf the air and water temperatures are especially high and outside operating limits the refrigerator may have been required to operate in unfavourable conditions Startup under critical conditions could result in the high pressure gauge intervening to reset the high pressure gauge see Section 6 2 Resetting the high pressure gauge To resolve this issue reduce the heat load of the machine by partially intercepting the users or if this is not possible by reducing the rate of water flowing in the evaporator to this end partially close the outlet tap from the refrigerator and restart the machine Let the refrigerator operate under these conditions until the water temperature falls within stipulated operating values then the tap can be opened fully 23 User Manual July 2013 5 0 ELECTRONIC CONTROL UNIT 5 1 002 electronic control unit 1 2 3 4 002 electronic control unit e Displays the temperature of the water exiti
51. ure has risen beyond the reset value See paragraph 6 1 Calibrating security devices and type of rearm Then after displaying the alarm wait for normal conditions to be restored press X ESC again hold it down for 5 seconds and the alarm will be reset 5 2 12 Table of alarm codes CWM003 CWM014 Alarm description CWM CWM Type of reset 003 006 008 014 Evaporator differential pressure switch _ Water level insufficient AP1 Pump magnetothermic circuit breaker water level Manual insufficient and or ventilator thermal protection AHO AHO High refrigerant pressure ALO ALO Low refrigerant pressure ACO Magnetothermic compressor circuit breaker and or Manual 30 User Manual July 2013 6 0 SAFETY DEVICES CWM chillers have a series of safety devices that limit the machine s temperature and pressure values to ensure that it operates within the anticipated limits and to avoid dangerous situations Here is a list of dangerous situations including the relative safety device and its location Dangerous situation Safety device High condensation High pressure switch Compressor output pressure pipe Low evaporation Compressor intake Low pressure switch pressure pipe Low water flow Water differential Plate evaporator Capacity pressure switch temperature evaporator High water pressure Safety valve Accumulation tank Frequent compressor Anti circulation timer Electronic c
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