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CLOSE CONTROL AIR CONDITIONERS

1. CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 1 1 2 U UNDER DOWNFLOW DISCHARGE Page 10 of 72 1 2 OPERATING LIMITS SERIES C AIR CONDITIONING UNIT UNIT TYPE DIRECT EXPANSION CHILLED WATER L H CHARACTERISTICS OC UC OC UC OC UC MAXIMUM INTERNAL j TEMPERATURE 30 30 30 C 30 C 30 C 30 C MINIMUM INTERNAL B TEMPERATURE 21 C 21 19 19 18 18 60 50 60 50 60 50 30 30 30 30 30 30 STORAGE Temperature from 20 C to 50 C Humidity 10 Ur to 90 Ur non condensing Store in a room that is CONDITIONS closed and protected from external atmospheric agents CONDENSERS AND DRY COOLER UNIT TYPE AIR WATER CHARACTERISTICS WITH VARIATOR AND WITHOUT VARIATOR WITH PRESSURE WITHOUT PRESSURE ELECT PANEL AND ELECT PANEL CONTROLLED VALVE CONTROLLED VALVE Up to 30 C AT 17 C MAXIMUM EXTERNAL Up to 35 C 15 C 45 C TEMPERATURE Up to 40 13 Water Up to 46 10 P MINIMUM EXTERNAL 4 T 5 TEMPERATURE 25 C 40 10 25 WATER 5 INTERNAL WATER COOLED TYPE CHILLED WATER HOT WATER HUMIDIFIER CONDENSER MAXIMUM PRESSURE 16 bar 1 6 Mbar 16 bar 1 6 Mbar 8 bar 0 8 Mbar 16 bar 1 6 Mbar MINIMUM PRESSURE 1 0 1 Mbar 1 0 1 Mbar MAXIMUM AP
2. 10 2 DIRECT EXPANSION AIR CONDITIONERS REFRIGERATION CIRCUIT PROBLEMS LOW PRESSURE NO BLOCK COMPRESSION DISCHARGED i DEFECTIVE OWAIRFLOW LOW MECHANICAL VALVE REFRIGERATI i MES LEVEL IN THE CONDENSATION BREAKDOWN BREAKDOWN ON CIRCUIT P EVAPORATOR 2 SEARCH FOR REPLACE CHECK THE DISCONNECT THE LEAK THE CONDENSATION COMPRESSOR AND THEN BELLOW CONTOL SYSTEM AND REPLACE RESTORE CHECK AIR VERIFY FAN CIRCUIT AND SETTINGS CLEAN THE RESTORE AIR FILTERS ORIGINAL CONDITIONS Page 61 of 72 le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE HIGH PRESSURE LEVEL BLOCK AIR FLOW LEVEL IS i AIR INFEED MISSINGFAN REFRIGERATION TOO LOW AT THE TEMPERATURE 1 U OPERATION i CIRCUIT IS TOO CONDENSER TOO HIGH CHARGED CHECK FOR MEASURE AIR ELIMINATE CHECK THE CHECK THERMAL CHECK AND POSSIBLE TEMPERATURE POSSIBLE EFFICIENCY OF BRING BACK OBSTRUCTIONS RECIRCULATION THE PROTECTIONS AND WITHIN LIMITS ON THE COIL OF EJECTED AIR CONDENSATION POWER CONSUMPTION CONTROL SYSTEM CLEAN CONDENSER COIL NO WATER DEFECTIVE REFRIGERATION DIRTY i WATER INFEED Poi PRESSURE Poi CIRCUIT IS TOO TEMPERATURE IS CONTROLLED CHARGED CONDENSER TOO HIGH VALVE oj CHECK HYDRAULIC CHECK OPERATION CHECK AND CHECK AND CIRCUIT PUMPS AND CALIBRATION BRING BACK RESTORE AND SHUT OFF ORIGINAL COCKS CONDITIONS
3. FILLING eesosososossseveceeesesesteocceooocssecosceccecese NO VOLTAGE IN 2 FILLING VALVE 2 WATER IS LOAD SOLENOID SOLENOID FAULT WATER i 2 TOO x CONDUCTIVE osseooeo PLAN FOR SOFTNER BASED ON VERIFY DISCONNECT ELECTRICAL AND REPLACE BOARD OF THE THE HUMIDIFIER SOLENOID ALLOWED VALUES VERIFY CONTACTOR CONSENT eee PRESENCE OF POLYPHOSPH ATES osoooooooo CHECK CLEAN THE CLEAN THE PRESSURE FILTER OF OER r REDUCER THE WATER FILLING ELIMINATE DISPENSERS Page 67 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE CONTINUOU S WATER DISCHARGE NO BOILING nq p sl S 5 TOOFUEL 62 00 ME INTERVENTION CYLINDER s 9s lon xr aeeece l e e e DISCHARGE MANUALLY ADD SALT
4. Periodically verify the oil level of the compressor MAX 30 METRES For lines beyond 60 m install an oversize liquid receiver Installation with condenser at bottom Maximum recommended length The equivalent of 10 m 5 m 5 m THERMAL 1 100 Cooling capacity decrease for lines that beyond INSULATION 10 47 About 296 for each equivalent 10 m Plan for the gradient as shown in figure 5 METRES Plan for refrigerant undercooling gt by 6 C Periodically verify the oil level of the compressor For lines beyond 20 m install an oversize liquid receiver Page 28 of 72 4 2 3 NON RETURN VALVES DISCHARGE AND RETURN PIPES IMPORTANT WARNING In installations with refrigeration circuit pipes longer than 10 m featuring vertical pipe runs and the condenser located higher than the machine it will be necessary to install a non return valve on the refrigerant discharge pipe as near as possible to the compressor outlet This will prevent the refrigerant in the event of compressor shutdown from flowing back down the discharge pipe to the compressor and damaging it at the next start up and or preventing normal operation by causing a high pressure blockage Naturally the valve must be installed vertically and the right way round in accordance with the refrigerant flow direction In the case of pipe sections more than 20 m long and where minimum temperatures below 10 C may be
5. CLOSE CONTROL AIR CONDITIONERS INSTALLATION AND MAINTENANCE ROUTINE AND MAJOR TECHNICAL MANUAL Manual cod 75807207B 0610 ORIGINAL VERSION CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE Page 2 of 72 CONTENTS 1 DESCRIPTION OF THE UNIT 8 1 1 UNIT CODE 8 1 2 OPERATING LIMITS 11 2 TRANSPORT POSITIONING AND INSTALLATION PROCEDURES 12 2 1 TRANSPORTATION AND RECEIVING THE MACHINES ON SITE 12 2 2 POSITIONING THE UNIT AND INSTALLATION CLEARANCES FOR ORDINARY MAINTENANCE 14 2 3 PLENUMS AND PLINTHS ACCESSORY 15 2 4 EXTERNAL FILTERED AIR INTAKE ACCESSORY 17 2 5 CEA AIR COOLED CONDENSERS 18 3 WATER CONNECTIONS 20 3 1 CONDENSATE DRAIN AND SIPHONS 20 3 2 WATER COILS 22 3 3 WATER COOLED CONDENSERS ACCESSORY 23 3 4 HYDRAULIC CONNECTIONS FOR FREE COOLING AND TWO SOURCES UNITS 24 3 5 INTERNAL IMMERSED ELECTRODE HUMIDIFIER CONNECTIONS ACCESSORY 25 4 REFRIGERATION CIRCUIT CONNECTIONS 26 4 1 TYPES OF PIPING TO BE USED 26 4 2 DIMENSION VALUES OF THE REFRIGERANT PIPES AND ADDITIONAL COMPONENTS OF THE CIRCUIT 27 4 3 REFRIGERANT EMPTYING AND LOADING OPERATIONS 32 5 ELECTRICAL CONNECTIONS 39 5 1 INSTALLATION OF THE REMOTE CONTROL INTERFACE ACCESSORY 40 5 2 INSTALLATION OF THE TEMPERATURE AND HUMIDITY SENSOR SUPPLIED ACCESSORY 41 5 3 INSTALLATION OF THE DIFFERENTIAL PRESSURE SWITCH ACCESSORY 41 5 4 INSTALLATION OF THE WATER DECTECTION PROBE ACCESSORY 42 59 CONNECTION OF THE LOC
6. Page 62 of 72 10 3 CHILLED WATER AIR CONDITIONERS REFRIGERATION CIRCUIT PROBLEMS NO COOLING AIR PRESENT WATER THREE WAY IN THE TEMPERATURE i VALVE DID NOT CIRCUIT J TOOHIGHEXITING OBEN THE EVAPORATOR VERIFY AND CHECK CHILLER AND BRING REMOVE ANY AIR TEMPERATURE BACK TO IN THE CIRCUIT DESIGNED CONDITIONS CHECK THE CHECK OPERATION CHECK THAT THERE ELECTRONIC BOARD OF THE ARE NO MECHANICAL SERVOMOTOR BLOCKS IN THE OPENING SYSTEM Page 63 of 72 Tec Lore CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 10 4 HEATING SECTION PROBLEMS CIRCUIT BREAKER INTERVENTION SHORT CIRCUITED RESISTANCE CADTLIEN DISCONNECT AND REPLACE CLEAN THE AIR FILTERS Page 64 of 72 SAFETY THERMOSTAT INTERVENTION HIGH TEMPERATURE FOR REDUCED AIR FLOW CHECK AND BRING BACK TO DESIGN CONDITIONS NO HEATING NO HEATING WATER TEMPERATURE IS TOO LOW CHECK AND BRING BACK TO DESIGN CONDITIONS VERIFY FAN CONNECTIONS AND OPERATION VALVE DID NOT OPEN woseooos CHECK OPERATION OF THE SERVOMOTOR HOT GAS POST NO POST HEATING NO SERVO CONTROL OPERATION CHECK POWER SUPPLY AND MUDULATING SIGNAL CHECK SERVO CONTROL OPERATION CHECK THAT THERE ARE NO ME
7. 4 3 4 VERIFICATION OF REFRIGERANT CHARGE Correct system equilibrium depends on the choice of fundamental components and measuring the refrigerant charge It can be demonstrated by measuring overheating in refrigerant exiting the evaporator and the undercooling upon exiting the condenser A correct overheating value between 4 and 6 K demonstrates that the coolant supplied to the evaporator is completely evaporated and there is no liquid in the suction line This also proves that the system has been charged with the correct amount of refrigerant Limited overheating shows that refrigerant fluid in the evaporator is not completely evaporated resulting in liquid that returns to the compressor and it may be caused by an excessive refrigerant charge from the thermostatic valve that is open too much or excessively large but even simply by the valve bulb not being fasten to the suction pipe well or influenced by an air flow It is also important to verify the undercooling value An undercooling value that is excessively limited means that condensation of refrigerant fluid in the condenser is incomplete this results in a shortness of liquid refrigerant to the thermostatic valve A correct Undercooling value is between 2 and 10 K OVERHEATING MEASUREMENT UNDERCOOLING MEASUREMENT 4 3 5 ADDING OIL TO THE REFRIGERATION CIRCUIT If at the end of the operations included in the previous chapters and after a few hours of operation it were to be v
8. Air conditioners with internal water cooled condensers are supplied FULLY CHARGED with refrigerant 4 3 1 VACUUM OPERATIONS After all connections and seal test operations included in the previous chapters have been completed for the refrigerant circuit it is necessary to empty the refrigerant circuit Emptying operations are necessary to remove any residue of the technical gasses used for soldering and seal tests atmospheric air and the water vapour that is part of it In order to complete such operations it is necessary to use vacuum pumps The very low residual pressures obtained with good vacuum pumps make it possible to remove gas and also boil any small quantities of water both evaporation and removal A correct vacuum level that be reached in the installation area is equal to 300 350 0 39 0 46 mBar The procedure for carrying out vacuum in the circuit is the following 1 Remove pressurisation nitrogen from the circuit 2 Connect pressure gauges as shown in the diagram see the next chapters 3 Connect the vacuum pump and the tank of refrigerant to the pressure gauges 4 Power the machine but not the compressors to heat the possible crankcase oil heater 5 Verify that all circuit cocks open 6 Bring the pressure gauges in position for operation in vacuum phase Start the vacuum pump 8 Check that vacuum is achieved through the specific pump pressure gauge 9 Once vacuum has been reached leave th
9. Defective components will be replaced at the Uboldo manufacturing plant and all transportation and replacement costs shall be borne by the Purchaser The duration of the warranty is 2 two years from the date of consignment The warranty shall be rendered void automatically if the equipment is repaired or modified or in any way completed such as for example in the case of non supply of an electrical panel or similar or in the case of the installation of non original parts parts not supplied by TECNAIR LV The above warranty conditions apply provided that the Purchaser has fulfilled all contractual obligations and in particular those regarding payment Page 5 of 72 7 le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 1 SYMBOLS USED WARNING DANGERI This symbol is used to indicate situations or procedures which are potentially hazardous or which require particular care to be taken by the operator NOTE This symbol is used to indicate tips and suggestions which may be useful to the operator ELECTROCUTION HAZARD This symbol is used to indicate situations or procedures which may present a potential electrocution hazard for the operator HAZARDOUS MOVEMENT This symbol is used to indicate situations or procedures which may present a potential crushing hazard for the operator HEAVY LOADS This symbol is used to indicate situations or procedures involving the use of heavy equ
10. the telephone connectors into one of the terminals of the TCON6 board and the other into the terminal connector as shown in the wiring diagram For safe connection use the toroid supplied with the user terminal to avoid interference on the line which could damage the memory or components on the board itself If the terminal is disconnected from the board while the unit is powered on we recommend waiting at least 5 seconds before reconnecting it r 26 2 Connection of the remote terminal Page 40 of 72 5 2 INSTALLATION OF THE TEMPERATURE AND HUMIDITY SENSOR SUPPLIED ACCESSORY Two types of sensor are supplied accessories 1 Temperature or temperature and humidity sensor for duct installation Duct installed temperature sensor for supply monitoring this should be installed inside the supply duct for the room nearest to the inlets The humidity sensor will be installed on the machine in the return compartment Duct installed temperature and humidity sensor for return monitoring this should be installed inside the return duct for the room nearest to the return inlets 2 Temperature or temperature and humidity sensor for wall installation this should be installed in the room you wish to monitor at a height of approximately 1 7 m The connection cable is sot supplied by TECNAIR LV 5 3 ROOM INSTALLATION THE DIFFERENTIAL PRESSURE SWITCH ACCESSORY The
11. unless explicit permission is granted by TECNAIR LV If this condition cannot be met it will be necessary to connect suppressors R C in parallel with the coils of the relays of any such loads The signal control cables must be kept separate from high current cables power cables and any cables that are potential sources of electromagnetic interference To avoid potential damage to electrical and electronic equipment caused by voltage surges in the electricity supply line TECNAIR LV recommends evaluating the necessity of installing SPDs Surge Protection Devices appropriately rated for the type of installation and the frequency of direct lightning strikes on the electricity supply line Page 39 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE eee 5 1 INSTALLATION OF THE REMOTE CONTROL INTERFACE ACCESSORY If the complete terminal or reduced version is to be panel or recess mounted the maximum thickness of the panel must be 6 mm if the terminal is to be recess mounted in a wall a masonry box with internal dimensions sufficient to accommodate the terminal and the connection cables must be provided The dimensions and drilling templates are as follows Recess mounted installation Wall installation 138 mm 110 mm 0 5 76 mm 0 5 DIMA Di FORATURA The user terminal is connected to the main board via a 6 wire telephone cable To make the connection simply plug one of
12. 51 5 15 5 4 71 6 5 22 5 4 81 7 5 24 7 3 101 10 30 10 0 131 12 40 12 5 151 15 46 13 5 Table of maximum compatible refrigerant amounts circuit without installation of solenoid valve liquid pipe If the calculated charge is greater than the maximum compatible amount it will be necessary to install a solenoid valve on the liquid pipe which by closing when the compressor is shut down will prevent the refrigerant from flowing back towards the compressor through the liquid pipe Obviously it is also necessary to prevent refrigerant from flowing back to the compressor through the discharge pipe This is achieved by installation of the non return valve on the refrigeration discharge lines The latter valve unlike the solenoid valve is not offered by TECNAIR LV as an optional accessory as it must be installed when the refrigeration circuit external to the machine is installed while the solenoid valve is installed inside the machine itself Page 29 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 4 2 5 OPERATION WITH VERY LOW EXTERNAL TEMPERATURES Tecnair LV direct expansion air conditioners as an accessory come with an air condensation pressure control via reduction of the air flow rate in accordance with the reduction in the condensation pressure This system is very efficient up to external temperatures of approximately 25 C also thanks to the delay of 180 seconds impl
13. 0 8 xYx C 0 8 xYx C Clearances for horizontal installation m ir Clearances for vertical installation FL LI LU L LI LU Lg Lg ul y 0 5 xY L q Ama ASIT LAT TTT TEREE m m m PT TTT EAT gt BAS SS SSSSSSESESESE EOS lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 3 WATER CONNECTIONS WARNING TECNAIR LV tests water components with dried compressed air at 24 bar This ensures that no water is present in the water circuits thereby preventing the possibility of freezing during storage prior to installation However during the positioning and installation procedures it is essential to take extra care not to fill the water circuits even accidentally before all the necessary antifreeze measures stipulated in the design specifications have been implemented e g insulation addition of glycol etc 3 1 CONDENSATE DRAIN AND SIPHONS All air conditioners whether direct expansion or water chilled coils require a condensate drain connection and the humidifier drain of the building waste drainage system The siphon essential for draining condensate as the bowl is located in a point of negative pressure is supplied already installed on the unit and should be connected when the unit is placed in position by the installer Th
14. 26 0 80 2 20 2 00 0 14 16 0 55 0 27 0 85 2 40 2 10 16 18 0 60 0 30 0 95 2 70 2 40 20 22 0 70 0 35 1 10 3 20 2 80 26 28 0 80 0 45 1 30 4 00 3 30 Calculation of circuit component equivalent metres Diameters mm Inches mm Inches mm Inches 10 12 3 8 14 16 5 8 20 22 7 8 12 14 1 2 16 18 3 4 26 28 1 1 4 Page 27 of 72 D leu CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 4 2 2 ROUTING OF THE REFRIGERATION CIRCUIT PIPES The table below includes the most common installation examples indicating the recommended length of the line Installation with condenser at top Maximum recommended length The equivalent of 30 m 15m 15m HAWE Aat Cooling capacity decrease for lines that go beyond 30 m About 2 for each equivalent 10 m Plan for oil traps and a gradient as shown in figure 15 METRES MAX 5 METRES 5 METRES Periodically verify the oil level of the compressor For lines beyond 60 m install an oil separator For lines beyond 30 m install oversize liquid receiver Installation with condenser on a level Maximum recommended length The equivalent of 60 m 30 m 30 m THERMAL Cooling capacity decrease for lines that beyond NSULATION T a 60 m About 296 for each equivalent 10 m Plan for the gradient as shown in figure
15. 3 m and are not too tight so as to allow expansion of the pipe 8 Check that liquid pipe diameter conforms with the indications in the installation manual Page 56 of 72 Checks that support brackets are installed on the discharge pipe every 3 and 9 not too tight so as to allow expansion of the pipe 10 Check that the refrigeration circuit valves are open including the valve on the hot gas injection pipe 11 Check the electrical connections to the condenser disconnect switch 12 Check that the disconnect switch is in the closed position condenser powered on 13 Check that refrigeration circuit pipe connections of the condenser with the evaporator are opposite the flow direction of the air flow 14 Check that the condenser is positioned correctly to prevent air recirculation that would otherwise impair performance 15 Check the seal of the refrigeration circuit 16 Check the vacuum level of the refrigeration circuit 17 Check the refrigerant charge level in the refrigeration circuit 18 Check the evaporation pressure 19 Check the condensation pressure 20 Check the superheating of the refrigerant aspirated by the compressor 21 Check the sub cooling of the liquid refrigerant 22 Check that the liquid line filter is not clogged 23 Check the power consumption of the compressor 24 Check operation of the hi
16. AT 1 100 kPa 1 bar 100 kPa VALVE MAXIMUM TEMPERATURE 85 C 40 C MINIMUM TEMPERATURE 9c i PE For different work conditions contact TECNAIR LV offices Page 11 of 72 D leu CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 2 TRANSPORT POSITIONING AND INSTALLATION PROCEDURES WARNING ALWAYS USE SUITABLE EQUIPMENT TO MOVE THE UNIT 2 1 TRANSPORTATION AND RECEIVING THE MACHINES ON SITE During transportation the machines must not be laid on their sides or overturned but must remain upright at all times otherwise their internal components could be damaged As the Carrier is always responsible for damage sustained by the goods during transport before signing the delivery note to accept the supply make sure the packaging is intact and that there are no visible signs of damage to the air conditioner or oil refrigerant leakage In the event of evident damage to the unit or if there is the slightest doubt as to whether the conditioner has been damaged during transport it is necessary to express your reservations in writing to the Carrier whilst also informing the TECNAIR LV Sales Department Unless otherwise agreed with the Customer TECNAIR LV shall supply their machines ex works with standard packaging consisting of wooden pallet 1 protective polystyrene packing 2 3 and polythene sheet 4 Page 12 of 72 When unloa
17. M S V 1 ADJUSTMENT SCREW 2 SET POINT INDICATOR adjustabie WEE w sssss SETPOINT SCREW Ww el vache i OUTPUT TO MOTOR pa SETPOINT 71 Cut off made FSC type regulator External Regulator CEA C 1 SET POINT 2 CUT OFF 37 72 CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 4 3 7 EXAMPLE OF REFRIGERATION CIRCUIT The following image represents the refrigeration circuit in series C units BATTERIA ESPANSIONE Dx COIL VALVOLA TERMOSTATICA TERMOSTATIC VALVE Erd e ji VALVOLA SOLENOIDE ACCESSORID SOLENOID VALVE ACCESSORY VALV BY PASS ACCESSORY SP CONTR IACCESSORY CONDENSATORE ARIA ICEA AIR CONDENSER CEA _ 4 T COMPRESSORE COMPRESSOR REFRIGERANTE REFRIGERANT MANOMETRI gt MANOMETERS VUOTO VACUUM PUMP Page 38 of 72 ELECTRICAL CONNECTIONS WARNING BEFORE CARRYING OUT ANY PROCEDURES ON THE UNIT SET THE MAIN SWITCH TO POSITION O The external electrical connections of the air conditioner must satisfy the following prescriptions They must be suitably dimensioned to withstand the maximum load in Amperes indicated on the electrical wiring diagram and on the data plate located inside the electrical compartment of the unit itself The electrical wiring diagram su
18. differential pressure switch to be installed in the controlled environment is of fundamental importance as it transmits a continuous environmental pressure reading to the microprocessor It therefore allows the microprocessor to take the most suitable action in order to maintain the correct overpressure or negative pressure level for the controlled room The pressure switch used has two air inlets and an electrical terminal board which should be connected to the electrical panel terminal board using a shielded 3x0 35 cable AWG22 as illustrated in the electrical wiring diagram The connection cable is sot supplied by TECNAIR LV The difference in pressure between the controlled room and the reference environment is measured using two small flexible and transparent hoses with a 4 7 diameter Page 41 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 5 4 INSTALLATION OF THE WATER DECTECTION PROBE ACCESSORY The accessory for detecting water provides an alarm if the pinpoint probe supplied with the device is even partially covered with water The pinpoint probe is made of an anti corrosive metal container through which it is possible to access the two terminals for connecting the line and the closing resistance supplied along with the probe It is possible to connect multiple probes in series to control a wider area The probe must be positioned in the area being checked and connected as shown i
19. expected it will be necessary to install another non return valve at the outlet of the air cooled condenser and as close to it as possible the valve should be installed vertically to prevent the refrigerant from flowing back to the condenser when the system is off and the external temperature is very cold and thereby preventing efficient condensation of the refrigerant the next time the compressor is started 4 2 4 SOLENOID VALVE ON THE LIQUID PIPE ACCESSORY The scroll compressors installed on TECNAIR LV air conditioners will not be damaged by the presence of any liquid refrigerant in the crankcase However when the refrigeration circuit is shut down in the summer season i e when the external temperature is just a few degrees higher than the internal temperature the liquid refrigerant flows towards the compressor the coldest point of the circuit and depending on the amount of refrigerant in the system floods it partially or completely In this case the high pressure switch may trip at the next start up It is therefore necessary to compare the refrigerant charge in the circuit calculated as the sum of the contents of the various components of the circuit with the maximum amount compatible with correct operation without the solenoid valve on the liquid pipe as indicated in the table below Size aa Maximum amount of refrigerant kg Rated power Hp Rated power kW 21 2 6 2 8 31 3 10 3 6 41 3 5 11 5 4
20. has to operate in winter with temperatures below zero The refrigeration circuit inlet and outlet unions on the air cooled condenser can be identified by their adhesive labels In any case note that the exchange of heat between the air and the refrigerant should occur in the opposite direction to flow This means that the condenser inlet union for the gaseous refrigerant is the union furthest from the air inlet into the coil i e the union nearest the fans Conversely the condenser outlet union for the liquid refrigerant is the union furthest away from the fans ingresso refrigerante uscita x refrigerant inlet water outlet lata refrigerante acqua refrigerant side water side Mee eye gt LN uscita refrigerante Z ingresso acqua refrigerant outlet water inlet Refrigerant connections opposite to flow direction Page 26 of 72 4 2 DIMENSION VALUES OF THE REFRIGERANT PIPES AND ADDITIONAL COMPONENTS OF THE CIRCUIT Correct routing of the refrigeration circuit pipes is essential to the successful operation of the air conditioner It is necessary to take special care in the selection and positioning of the compressor discharge and suction pipes above all when these lines are relatively long The total equivalent length of the pipes discharge return affects the cooling capacity of the units in a more or less significant manner The following pages will define the leaks based
21. mg l Fe 0 0 2 Chlorides ppm C1 0 30 Silica Mg l SiOz 0 20 Residual chlorine mg l C1 0 0 2 Calcium sulphate CaSO 0 100 Metallic impurities mg l 0 0 Solvents thinners soaps lubricants mg l 0 0 1 Values dependent on specific conductivity generally TDS 0 93 620 R180 0 65 6520 2 not lower than 20096 of the chloride content in mg l of CI 3 not lower than 300 of the chloride content in mg l of Cl IMPORTANT WARNING THERE IS NO NEED TO USE WATER SOFTENERS THERE IS NO RELIABLE RELATION BETWEEN WATER HARDNESS AND CONDUCTIVITY Page 25 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 1 4 REFRIGERATION CIRCUIT CONNECTIONS 4 1 TYPES OF PIPING TO BE USED The piping must be Gelidus type copper therefore suitable for direct expansion refrigerant circuits The copper must be soft annealed for pipes with diameters of up to 26 28 and hard drawn for larger diameter pipes To prevent copper dust or swarf from getting into the system the pipes should be cut using a pipe cutter rather than a hacksaw It is then necessary to carefully clean the pipe endings using the specific pipe reamer If the ends are to be soldered they should be cleaned with grade 00 glasspaper to eliminate all oxidisation and dirt After this the pipe should be inserted in the joint and heated evenly to the melting point of the solder so that it flows easily
22. parts pay particular attention to cooling fans and heat sinks 6 2 5 MAINTENANCE OF THREE WAY VALVES The three way control valves do not require any specific maintenance procedures It is however wise to familiarise yourself with the actuator removal and manual opening procedures Remove the valve actuator Do not use tools Use the special screw on hood to open or close the valve Page 50 of 72 6 2 6 MAINTENANCE OF CEA AIR COOLED CONDENSERS Air cooled condensers require regular inspection of the evaporator coils which should be cleaned if the cooling fins become clogged with dirt It is also necessary to check the fan power draw while listening for abnormal fan noise and checking the condition of the speed control The coils should be cleaned in accordance with the following indications P y LAVAGGIO CLEANING NETTOYAGE LAVADO Etichetta di identificazione Menlificatian label Plaque d identification Typenschild Etiqueta de denticackin dal modelo sI YES QUI JA SI n n ji NO NO NON NEIN NO 115 20 SI YES OUI NO NO NON JA SI NEIN NO NOTE PER UN CORRETTO NOTES FOR CORRECT INSTRUCTIONS A SUIVRE ANWEISUNGEN F R KOR NOTAS PARA UN LAVADO LAVAGGIO CLEANING POUR UN NETTOYAGE REKTE REINIGUNG ID NE CORRECT getto a ventaglio lama flat fan spray Facher Strahl Flach presi n agua 80 100 piatta water pressure P mise 25
23. with the order confirmation Preparing flexible tubing for simplifying filter replacement procedures and panel removal in case of routine or major maintenance is recommended VISTA LATO DX RIGHT VIEW DB Units with filtered external air intake Filtered air intake Installation dimensions Unit Positioning mm Dimensions mm Height Depth Height Depth D OCA 21 H 31 H 41 51 OCU 20 556 104 21 H 31 H 41 51 L UCU 20 655 94 OCA 51 H 71 L 81 L OCU 30 556 104 51 H 71 81 L UCU 30 655 94 71 H 81 101 L 72 H 102 L OCU 50 566 114 71 H 81H 101 L 72 H 102 L UCU 50 846 164 101 H 131 L 151 L 102 H 142L 162 L 1600 100 UCA 101 H 131L 151 L 102 H 142 L 162 L 1096 87 OCA 131 H 151 H 142 H 162 H 202 L 262 L T qud 207 124 OCU 80 110 UCA 131 H 151 H 142 H 162 H 202 L 262 L UCU 80 110 bd 202 H 262 302 L 1600 100 UCA 202 H 262 H 302 L 1096 87 OCA 302 H OCU 160 566 114 UCA 302 UCU 160 846 164 OCA 220 566 114 UCA 220 846 164 For these models the external air intake is located inside of the technical compartment Page 17 of 72 CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 2 5 CEA AIR COOLED CONDENSERS CEA air cooled co
24. 0 2 x 0 5 2x2 2x2 2 3 2 3 2 0 7 102 2 5 30 2 0 5 2 25 2 3 2 3 2x3 2x 0 7 142 L 2 x 6 5 42 2 x 0 8 2x3 2 x 3 5 2 3 5 2 3 5 2 1 2 142 2 6 5 42 2 0 8 2 2 5 2 3 2 3 5 2 3 5 2 1 2 162 L 2 x 7 5 45 2 x 1 0 2x3 2 x 3 5 2x5 2x5 2 1 2 162 H 2 x 7 5 45 2x 1 0 2x3 2x3 5 2 5 2 5 2 1 2 202 L 2x10 64 2x12 2x4 2x4 5 2x6 5 2x6 5 2x1 8 202 H 2x10 64 2x12 2 4 5 2 4 5 2 6 5 2 x 6 5 2 1 8 262 L 2 12 75 2 1 6 2x4 2 x 4 5 2 x 6 5 2 x 6 5 2 x 2 4 262 H 2 12 75 2 1 6 2x4 2 x 4 5 2 x 6 5 2 x 6 5 2 x 2 4 302 L 2 15 90 2x19 2x4 2x4 5 2x6 5 2 6 5 2 2 4 302 2 15 90 2 1 9 2 7 2 7 2 6 5 2 6 5 2 2 4 Refrigerant content of the unit Page 33 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE Weight of refrigerant in the discharge and liquid pipes Weight of refrigerant in kg per metre of pipe R407C Diameters 10 12 12 14 14 16 16 18 20 22 26 28 Liquid pipe 0 08 0 11 0 15 0 20 0 31 0 53 Discharge pipe 0 02 0 03 0 05 0 06 0 09 0 16 Air cooled condensers with CEA CEA LT axial fans Model Circuit refrigerant content kg Model circuit o content CEA 21 H V 0 66 CEA 91 H V 3 8 CEA 21 LN H V 1 0 CEA 101 H V 5 2 CEA 31 H V 1 32 CEA 101 LN H V 4 0 CEA 31 LN H V 2 0 CEA 111 H V 5 3 CEA 41 H V 1 32 CEA 111 LN H V 6 0 CEA 41 LN 1 9 CEA 121 H V 4 0 CEA 51c H V 1 95 CEA 121 LN H
25. 50 mechanical filter on the supply line 7 Use a water glycol solution where necessary Page 22 of 72 3 3 WATER COOLED CONDENSERS ACCESSORY For machines with integral water cooled condensers it will be necessary to install the supply and discharge lines to the condenser The diameters of the pipes and the inlet and the outlet unions are indicated in the order confirmation condensatore a piastre water cooled condenser ingresso refrigerante uscita acqua refrigerant inlet water outlet lato refrigerante lato acqua refrigerant side water side ingressa acqua uscita refrigerante water inlet refrigerant outlet ingresso arqua water inlet valvola pressostatica laccessorio pressoastatic valve laccessory 3 3 1 PRESSURE CONTROLLED VALVE ACCESSORY The pressure controlled valve accessory is essential when the water is supplied from a well river or aqueduct however it is not necessary when the water is supplied from a water tower In practical terms the valve is necessary if there is a chance that the water temperature may fall so low during winter e g below 15 degrees that the machine s condensation temperature is consequently reduced too much The valve is factory installed on the condenser water inlet If the water supply is obtained from a well or river two filters of suitable characteristics for the type of water must be installed in parallel one as backup for the othe
26. 990 202 H 262 302 L 2300 871 19990 UCA 202 H 262 H 302 L 2300 871 19990 OCA 302 H OCU 160 2640 871 1990 UCA 302 H UCU 160 2640 871 1990 OCA 220 3496 871 1990 UCA 220 3496 871 1990 Page 14 of 72 2 3 PLENUMS AND PLINTHS ACCESSORY Various types of air distribution plenum and plinth are available as accessories for both the Under U and Over O versions of the unit The various options are listed in the table below Type Front view Right Left Side View Plenum with opaque panels Drilling is responsibility of the client Plenum with front grille Plenum with front and side grilles Soundproofed duct section Front view E Adjustable plinth with and without baffle H 8 N Antivibranti regolabili x Dimensions mm Type sss Length Depth Height H Plenum A 550 Soundproofed Section B 550 Plinth A Variable The dimensions are the same as those of the unit see table in previous chapter Agreed upon during the order phase se order confirmation Adjustable 15 mm Page 15 of 72 CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 2 3 1 INSTALLATION OF PLENUMS AND DUCT SECTIONS The plenums and duct sections at the top of the unit are installed using the four brackets supplied which are to be fitted to the upp
27. AIR CONDITIONER ACCESSORY BATTERIA ESPANSIONE DX COIL VALVOLA TERMOSTATICA TERMOSTATIC VALVE VALVOLA SOLENOIDE ACCESSORIO gi ATTACCO SOLENOID VALVE ACCESSORY I KIT LT CONNECTIONS RICEVITORE LIQUIDO CAPACITA EXTRA i LIQUID RECEIVER Ln EXTRA CAPACITY ATTACCO CONNECTIONS VALVOLA NON RITORNO NON RETURN VALVE COMPRESSORE COMPRESSOR LT KIT FOR CEA CONDENSER CEA LT VERSION KIT LT A ATTACCO CONNECTIONS VALVOLA NON RITORNO NON RETURN VALVE ATTACCO CONNECTIONS VALVOLA BY PASS FORNITA A CORREDO BY PASS VALVE LOOSE SUPPLIED OUT CONDENSATORE ARIA CEA AIR CONDENS CONDENSER CEA Page 30 of 72 4 2 6 REFRIGERATION CIRCUIT INSTALLATION Here below explanatory images are included for the most important operations for installing the refrigerant circuit Not following one or more of the following recommendations may compromise proper system operation Using pipe cutters with rotating blade guarantee a cut that is perfectly perpendicular to pipe axis and do not produce metal fillings that may clog the slotted plates of the refrigerant circuit A correct internal and external trimming of the copper pipe simplify the soldering phases and reduce possible load losses due to pipe diameter reduction Correct curving of the pipes reduces load loss caused by a curve radius that is too tight or possible crushing of the pipes A correct capillary brazing decreas
28. AL NETWORK ACCESSORY 43 5 6 MODBUS SERIAL CIRCUIT BOARD RS485 ACCESSORY 44 6 ROUTINE AND MAJOR MAINTENANCE 46 6 1 ROUTINE MAINTENANCE 47 6 2 MAJOR MAINTENANCE 50 DEACTIVATION DISASSEMBLY AND SCRAPPING 52 APPENDIX 1 CLEARANCE NEEDED FOR ROUTINE MAINTENANCE 53 APPENDIX 2 PRELIMINARY AND PERIODICAL CHECKS AT FIRST START UP 56 10 APPENDIX 3 FAULT DIAGNOSIS 59 10 1 VENTILATION PROBLEMS 60 10 2 DIRECT EXPANSION AIR CONDITIONERS REFRIGERATION CIRCUIT PROBLEMS 61 10 3 CHILLED WATER AIR CONDITIONERS REFRIGERATION CIRCUIT PROBLEMS 63 10 4 HEATING SECTION PROBLEMS 64 10 5 DEHUMIDIFICATION PROBLEMS 65 10 6 HUMIDIFICATION PROBLEMS 67 11 GLOSSARY 69 12 NOTES 70 Page 3 of 72 7 le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE LIST OF REVISIONS Revision Date Author Chapters Description A 09 2009 AF All First version B 04 2010 AF Al The layout of the manual has been modified The parameter list for software version 1 10 has been modified Page 4 of 72 IMPORTANT WARNINGS The equipment described in this manual has been constructed to operate without risk for the intended purposes provided that e Appliance installation connection operation and maintenance are carried out by qualified personnel in accordance with the instructions contained in these manuals e All the conditions stipulated in the user manual of the unit microprocessor are observed Any other use or mod
29. CHANICAL BLOCKS ON THE OPENING SYSTEM CHECK POWER SUPPLY AND MUDULATING SIGNAL 10 5 DEHUMIDIFICATION PROBLEMS DEHUMIDIFICATION DIRECT EXPANS M COMPRESSOR j HIGHAIR HIGH VALVEDID Y FLOW WATER 1 u LEVEL TEMPERATU RELEVEL CHECK BRING BACK CONSENTS ON TO DESIGN ELECTRONIC CONDITIONS BOARD BRING BACK CHECK CHECK TO DESIGN ELECTRONIC OPERATION OF CONDITIONS BOARD THE POWER SERVOMOTOR REMOVE POSSIBLE MECHANICAL BLOCKS OF THE CLOSING SYSTEM Page 65 of 72 CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE CHECK EXCESSIVE DEHUMIDIFICATION AIR FLOW LEVEL IS TOO LOW DIRECT EXPANSION 895 Per re rrr rrr rer rrr rere errs EVAPORATION WATER TEMPERATURE TEMPERATUR IS TOO LOW E IS TOO LOW CHECK CHECK FAN INTERVENED ELECTRICAL CLEAN FAN CIRCUIT CONNECTION BREAKER FILTERS CHECK BLOCKED FAN CHECK AIR CIRCUIT CHECK IF CHECK THAT BRING BACK OPERATION OF REFRIGERATIO CONDENSATION TO DESIGN THERMOSTATIC N CIRCUIT IS PRESSURE IS CONDITIONS VALVE DRAINED NOT LOW Page 66 of 72 10 6 HUMIDIFICATION PROBLEMS CYLINDER IS SHORT CIRCUITED 1
30. DIMENSIONS FOR INSTALLATION AND CLEARANCES The figure below shows the dimensions to be taken into account during installation For the exact values of the dimensions indicated in the figure refer to the following table and in every case to the drawings supplied with the order confirmation The unit must be positioned differently based on the type of unit and always following the design and manufacturing requirements of the unit During installation observe the clearances required for routine maintenance and if needed for major indicated in the drawing enclosed with the order confirmation and in the appendix chapters of this manual Installation dimensions Unit Dimensions mm Clearances mm Length A Depth B Height External Air Edging D OCA21H 31H 41H 51 L OCU 20 750 621 1965 UCA 21 H 31 H 41 H 51 L UCU 20 750 621 1965 OCA 51 H 71 L 81 L OCU 30 750 771 1965 UCA51H 71L 81 L UCU 30 750 771 1965 71 H 81 H 101 L 72 102 L OCU 50 860 871 1990 71 H 81 H 101 L 72 H 102 L UCU 50 860 871 1990 101 H 131 L 151 L 102 H 142 L 162 L 1410 871 1990 101 H 131 L 151 L 102 H 142 L 162 L 1410 871 1990 OCA 131 H 151 H 142 H 162 H 202 L 262 L 1750 871 1990 50 30 OCU 80 110 UCA 131 H 151 H 142 H 162 H 202 L 262 L reer 1750 871 1
31. INTENANCE c C 3 2 WATER COILS It will be necessary to install inlet and outlet pipes on both machines with chilled water coils and those with hot water coils The diameters of the pipes and the inlet and the outlet unions are indicated in the order confirmation The water inlet and outlet unions are indicated in the figure below The unions can also be identified by their adhesive labels The maximum pressure of the water supply to the coils is 16 bar 1 6 MPa The maximum pressure difference between the water inlet pipe and the outlet pipe is 1 bar 100 kPa as at pressure differences greater than this value the return spring would not be able to shut off the water flow In the event of greater pressure differences it will be necessary to install a pressure reducing valve upstream of the 3 way valve valvala 3 vie threway valve uscita acqua e water outlet ingressa acqua a water inlet 4r attacco femmina Ipallice gas female connection gas To ensure that circuit pipes are installed correctly we recommend that the following indications are observed Use pipes made of copper or steel Support pipes with suitable brackets 1 Insulate both pipes with Armaflex type insulation 2 Install shut off valves to facilitate maintenance 3 Install a Thermometer 4 and Pressure gauge 5 on the inlet and outlet Install a drain outlet at the lowest part of the circuit 6 Install a
32. NG DEVICE FOR COPPER TUBING PIPE CUTTER FOR COPPER TUBING REVERSABLE RATCHET WRENCH DIGITAL TESTER WITH AMPEROMETRIC CLAMP PIPE REAMER FOR COPPER TUBING EXPANDER FOR COPPER TUBING OXY GEN PROPANE SOLDERING KIT NITROGEN TANK FOR VERIFYING THE CIRCUIT HIGH PERFORMANCE VACUUM PUMP MANOMETRIC UNIT WITH FLEXIBLE PIPING REFRIGERANT THAT IS SUITABLE FOR THE UNIT R407C R410A ELECTRONIC SCALES ELECTRONIC LEAK DETECTOR Page 7 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 1 DESCRIPTION OF THE UNIT The machine in question is an air conditioner with direct expansion or chilled water coil designed for use in computer centres The cabinet consists of hot galvanised sheet panels in a frame constructed of painted aluminium section the panels are made from hot galvanised sheet steel covered in a PVC film secured by quick thread screws that can be unscrewed using a special safety wrench The structure incorporates a thermal and acoustic insulation system using self extinguishing materials polyurethane foam protected by plastic film 1 1 The machine comprises the following sections Ventilation section consisting of one or more plug fans Filter section self extinguishing non regenerable filters the machine includes provision for the use of a differential pressure switch to allow display of the clogged filter warning signal
33. R OPERATION MANUAL accompanying the IT media supplied Page 48 of 72 6 1 5 MAINTENANCE OF INTERNAL HUMIDIFIER WARNING THE CYLINDER MAY BE HOT LEAVE TO COOL BEFORE HANDLING OR USE PROTECTIVE GLOVES The lifetime of the humidifier cylinder depends on various factors including correct sizing and operation water supply within nominal values hours of operation and correct maintenance After a variable period of time the cylinder will inevitably need to be replaced To meet the above requirements follow the instructions below The humidifier requires periodic checks to ensure correct operation and extended cylinder lifetime These checks should be performed as follows Within and not exceeding the first 300 hours of operation check operation make sure there are no significant leaks of water and check the general condition of the housing Make sure that no sparks or arcs between electrodes are generated during operation Quarterly and not exceeding 1000 hours of operation check operation make sure there are no significant leaks of water and replace the cylinder if necessary Yearly and not exceeding 2500 hours of operation proceed with cylinder replacement After prolonged use and above all in the event of water with a high salt content solid deposits may cover the electrodes completely and adhere to the side walls In some cases the heat produced may deform the cylinder and in more serious cases may create ho
34. Refrigeration circuit comprising an expansion coil with copper pipes and aluminium cooling fins a scroll compressor fixed to the machine frame on rubber mountings thermostatic expansion valve receiver drier plate type condenser accessory low pressure switch automatic reset and high pressure switch manual reset pressurisation nitrogen charge antifreeze lubrication oil charge Hydraulic circuit with cooling expansion coil featuring copper pipes in aluminium cooling fins 3 way motorised valve with manual emergency control water circuit with anti condensation thermal insulation Electrical power and control panel UNIT CODE The code contains the following information E Upflow air discharge Air discharge type U Downflow air discharge Series for technology rooms f A Direct expansion coil with remote water cooled condenser A Cooling type U Chiled water with remote cooling 24105 Nominal size nominal cooling capacity in TONS 5 1 Number of cooling circuits or number of rows on chilled water coil 6 a Series modification index H High air flow rate 7 Air flow rate cooling capacity ratio L Low air flow rate 8 FREE COOLING unit type TS TWO SOURCES unit type UN R407C Refrigerant type Page 8 of 72 1 1 1 O OVER UPFLOW DISCHARGE Page 9 of 72
35. TO CLEAN THE MANUALLY AND DISCHARGE DISCHARGE DISCONNECT THE FILLING SOLENOID AND RESTORE THE CYLINDER MANUALLY AND AND REPLACE TANK THE FILLING RESTORE THE CYLINDER TANK DISCHARGE WATER i VALVE CUT OFF IS OPEN CHECK WATER CLEAN FILTER CLEAN COCKS AND WATER SOLENOID FILLING AND VALVE DISCHARGE WATER IS NOT DISCHARGIN CYLINDER IS WATER TOO FULL OVERFLOWS FROM THE TANK DISCHARGE NOVOLTAGE FUSE LOW DISCHARGE PIPINGIS i i DISCHARGE VALVE IN INTERVENED CONDUCTIVIT i CODREDANDUASA PIPING IS SOLENOIDIS DISCHARGE YWATER VERY SMALL DEFECTIVE SOLENOID ME E DISCONNECT CHECK DISCHARGE VERIFY WATER CLEAN AND REMOVE DISCONNECT THE ELECTRONIC MANUALLY AND SUPPLY VALUES COUNTERSLOPE AND REPLACE SOLENOID BOARD OF THE RESTORE PIPING AND REPLACE HUMIDIFIER Page 68 of 72 11 GLOSSARY Proportional band defines a temperature range of just a few degrees starting from the setpoint within which the system operates the control devices Default this term is used to describe the values e g setpoint and proportional band values that will be automatically applied by the system if the operator fails to set them Free Cooling introduction of external air into the environment by opening a damper or using cold water thereby cooling the environment while saving energy Step defines an area of the proportional band of tempe
36. V 7 9 CEA 51 LN 2 9 CEA 131 H V 4 0 CEA 61 H V 2 58 CEA 131 LN H V 8 0 CEA 71 H V 1 89 CEA 151 H V 6 0 CEA 71 LN H V 3 6 CEA 181 H V 8 0 CEA 81 H V 2 88 CEA 181 LN H V 8 0 CEA 81 LN H V 4 0 CEA 201 H V 10 5 Refrigerant content of the condenser circuit For condensers not included in the CEA table the refrigerant content will be 0 3 times the internal volume of the condenser indicated in the technical specifications supplied with the order confirmation The sum of the refrigerant content air conditioner liquid pipe discharge pipe condenser gives the total refrigerant charge required by the system Refrigerant content of air conditioner OCA 71H 3 3 Content of the CEA 61c H condenser 2 6 10 metres of 16 18 diameter discharge pipe 0 06 kg m x 10 m 0 6 10 metres of 10 12 diameter liquid pipe 0 08 kg m x 10 0 8 Total refrigerant content 7 3 WARNING THE WEIGHTS INCLUDED IN THE PREVIOUS TABLES ARE THEORETICAL AND MAY CHANGE WHEN THERE ARE ACCESSORIES AND SPECIAL IMPLEMENTATIONS Page 34 of 72 4 3 3 CHARGING THE CIRCUIT WITH REFRIGERANT WARNING Refrigerant circuit charging operations must be carried out with the unit in operation Make sure that electrical connections are correct Refrigerant must always be charged in liquid phase Make sure that piping connections to the tank are completed correctly Refrigerant charging operations must be completed while the unit is i
37. around the joint It is important to remember that the pipes should be as short as possible with bends kept to a minimum as the cooling capacity of the circuit can be reduced exponentially see the following chapters 4 1 1 DISCHARGE OR HOT GAS LINE This is the refrigerant line that connects the compressor outlet to the air cooled condenser inlet To facilitate connection inside the air conditioner there is a section of pipe approximately 200 mm long of which one end is connected to the compressor outlet with its cock while the other end is crimped and soldered shut During air conditioner operation the discharge pipe reaches a temperature of 70 80 C It is not necessary to thermally insulate this pipe as heat dispersal along this line facilitates correct operation of the refrigeration cycle The pipes should only be insulated for safety reasons in cases where there is a possibility of someone coming into accidental contact with the discharge pipe 4 1 2 LIQUID OR RETURN LINE This is the pipe that connects the condenser outlet to the air conditioner inlet valve To facilitate connection inside the air conditioner there is a section of pipe approximately 200 mm long of which one end is connected to the liquid receiver inlet with its cock while the other end is crimped and soldered shut The operating temperature of this pipe is about 40 C it does not need to be thermally insulated except in cases where the air conditioning system also
38. connections and the condensate drain lines from the air conditioner e scrapping of air conditioners is subject to the prevailing legal requirements in the country of installation TECNAIR LV recommends that you contact an authorised waste disposal contractor for this purpose Air conditioners are made primarily from raw materials such as aluminium copper and steel Page 52 of 72 8 APPENDIX 1 CLEARANCE NEEDED FOR ROUTINE WARNING THE NEEDED CLERANCE INCLUDED IN THE FOLLOWING ARE RELATING TO ROUTINE MAINTENANCE OF THE UNIT COMPLETE WITH ALL OF ITS ACCESSORIES UNITS IN STANDARD IMPLEMENTATION DO NOT REQUIRE SIDE CLERANCE MODELS UCA U 21 H 31H 41H 51 L 20 OCA U 21 H 31H 41H 51 L 20 53 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 9 APPENDIX 2 PRELIMINARY AND PERIODICAL CHECKS AT FIRST START UP WARNING BEFORE CARRYING OUT ANY PROCEDURES ON THE UNIT SET THE MAIN SWITCH TO POSITION O Before the Manufacturer s personnel proceed with machine testing and start up the checks listed on the following form must be carried out DATE PLACE SIGNATURE CUSTOMER S SIGNATURE PERIODICAL OR PRELIMINARY CHECKS AT FIRST START UP Start up or verification of machines wit
39. cteristics SERIAL COMMUNICATION PROTOCOL CHARACTERISTICS Protocol Modbus Slave RTU mode Communication Sid ee in terms of the Baud Rate Varies between 1200 and 38400 Baud Word Length 8 Parity None Stop Bits 1 Page 44 of 72 5 6 1 SERIAL CIRCUIT BOARD CONNECTION To create a RS485 network simply connect the SURVEY circuit boards via the connectors with extractable terminals on the serial board using a cable with the following characteristics Cable cross section Closing resistance Max length Belden 3106A 3107A AWG20 22 cross sect min 0 2 mm2 max 2 5 1200 0 25W 1 000 m mm2 2 5 mm2 Restistenza di chiusura f End line resistance RS485 network connection example WARNING DO NOT CREATE BRANCHES DO NOT LAY WITH POWER CABLES 10 15 T Pm Page 45 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 6 ROUTINE AND MAJOR MAINTENANCE WARNING BEFORE CARRYING OUT ANY PROCEDURES ON THE UNIT SET THE MAIN SWITCH TO POSITION O CHECK EVERY COMPONENTS Check general condition corrosion mountings cleanliness Check motor noise FANS Check the rotor vibration imbalance Check power consumption Clean the rotor and the motor Check the condition of the filters Mountings signs of damage AIR FILTERS Check filters are not clogged Check operation and calibration of differentia
40. ctions please see chapter 3 1 1 For refrigeration connections for units with direct expansion circulations refer to chapter 4 and the following ones To ensure that circuit pipes are installed correctly we recommend that the following indications are observed Use pipes made of copper or steel Support pipes with suitable brackets 1 Insulate both pipes with Armaflex type insulation 2 Install shut off valves to facilitate maintenance 3 Install a Thermometer 4 and Pressure gauge 5 on the inlet and outlet Install a drain outlet at the lowest part of the circuit 6 Install a 50 mechanical filter on the supply line 7 Use a water glycol solution WARNING WATER CIRCUITS OF FREE COOLING AND TWO SOURCES UNITS WITH DIRECT EXPANSION CIRCUITS NEED TO BE LOADED WITH A WATER GLYCOL SOLUTION TO AVOID FROST PROBLEMS DURING WINTER OPERATION AND IN CASE THE DIRECT EXPANSION CIRCUIT MALFUNCTIONS Page 24 of 72 3 5 INTERNAL IMMERSED ELECTRODE HUMIDIFIER CONNECTIONS ACCESSORY During installation of the unit it is necessary to connect a supply pipe as shown in the figure with the system characteristics indicated below The drainage pipe is supplied already installed by TECNAIR LV it must be connected as shown in the previous chapters The drainage water of the humidifier may reach temperatures of 100 C uscita steam supply umidificatore humidifie Once installation is comp
41. ctly ROUTINE MAINTENANCE to be performed by the user 1 3 MONTHS CONTROL MICROPROCESSOR TU DIL 6 MONTHS EEE EL pem INTERNAL HUMIDIFIER ELECTRICAL PANEL WATER CIRCUITS REFRIGERATION CIRCUITS MAJOR MAINTENANCE ud E by the maintenance service or assistance Page 46 of 72 6 1 ROUTINE MAINTENANCE 6 1 1 MAINTENANCE OF THE AIR FILTERS In TECNAIR LV air conditioners all air filters are equipped with differential pressure switches in order to monitor pressure loss caused by clogging The microprocessor signals when the measured pressure difference exceeds the set value To change the trip setting of a differential pressure switch simply unscrew the cover and turn the setting dial to the desired pressure differential value FILTER TYPE POSITION VALUE Pa GA F7 filter Suction 250 Note G4 filters can be partially regenerated by washing in hot water and neutral detergents F7 filters CANNOT be regenerated To guarantee the efficiency of the G4 F7 filters it is necessary to install the 15x3 mm seal supplied with replacement filters 6 1 2 AIR FILTER REPLACEMENT To replace the air filters the following instructions must be observed as well as full compliance with safety obligations regarding use of the equipment Set the main switch to 0 Open the front panels via the relevant safety locks Remove the filter support b
42. ding the units please observe the procedures indicated the illustrations reproduced below which are also affixed to the original packaging of the unit If the unit is not to be installed immediately after its arrival on site it should be stored in its original packaging in a dry enclosed area preferably heated to a temperature of 15 C during the winter months To avoid any problems and damage to the air conditioners during transportation we recommend that the units should only be removed from their packaging when they have reached their final destination It also essential to ensure that the floor on which the air conditioner is to be installed is capable of supporting its weight The weight of the unit can be found in the commercial documentation or read directly from the data plate located inside the unit NO NO NON NEN SI YES QUI JA NO NO NON NEIN 2 1 1 FRONT PANEL KEYS Keys for the front panels are supplied with the unit These keys are inserted in duplicate copy for each lock and a safety backup copy is also left inside of the electrical panel This type of key is numbered meaning it is always possible to purchase a duplicate by visiting a specialised hardware store and quoting the number stamped on the lock 5333 Page 13 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 2 2 POSITIONING THE UNIT AND INSTALLATION CLEARANCES FOR ORDINARY MAINTENANCE 2 2 1
43. e drain pipe used is 19x25 Retiflex with 1 2 fittings The drainage water of the humidifier may reach temperatures of 100 C The humidifier drain which does not require a siphon is supplied ready connected to the termination of the condensate drain HUMIDIFIER OPTIONAL n I WARNING THE CONDENSATE DRAIN IS SUPPLIED ALREADY SIPHONED IN ORDER TO AVOID DRAINAGE PROBLEMS DO ADD SIPHONS TO THE DRAINAGE LIINE AND PLAN ON A FUNNEL TYPE FITTING Page 20 of 72 3 1 1 CONDENSATE DRAIN PUMP ACCESSORY Both direct expansion and chilled water conditioners can be supplied with a condensation pumping trap accessory The condensation pumping trap is supplied mounted and installed and the drain pipe is connected to the building drainage system during the unit positioning phase The drainage pipe is flexible and transparent with a 6 mm diameter The humidifier drain that cannot be connected to such pump is separately supplied with a Retiflex 19x25 pipe with a 7 fitting The drainage water of the humidifier may reach temperatures of 100 C Condensation pumping trap HUMIDIFIER OPTIONAL WARNING THE CONDENSATE DRAIN IS SUPPLIED ALREADY SIPHONED IN ORDER TO AVOID DRAINAGE PROBLEMS DO NOT ADD SIPHONS TO THE DRAINAGE LIINE AND PLAN ON A FUNNEL TYPE FITTING Page 21 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MA
44. e pump in operation for a few hours min 2 hours 10 Switch of the pump and after a few minutes check the vacuum level 11 Disconnect the pump and move on to refrigerant charging operations COMPRESSDRE CDHPRESSDR REFRIGERAN TE REFRIGERANT MANDHE TERS VUOTO PUMP 32 of 72 4 3 2 CALCULATION CIRCUIT REFRIGERANT CHARGE To charge the refrigeration circuit s of a machine it is necessary to consider the total amount of refrigerant required which for a direct expansion unit equipped with remote condenser is determined by adding the refrigerant content of each individual component in the circuit The refrigerant content of the individual components are given in the following table Compressor Circuit content condenser Size Type Rated Rated Refrigerant Refrigerant kg Refrigerant kg Hp kW kg OC UC UC LT 21 H 2 6 2 5 3 3 0 2 31 H 3 10 2 5 0 4 41 H 3 5 11 2 5 0 6 51 L 0 7 51 H 0 7 71 L 1 2 71 H 1 2 81 L 1 2 81 H 7 5 25 1 0 2 5 3 5 5 5 1 2 101 L 10 30 1 2 2 5 3 5 6 5 6 5 1 8 101 H 10 30 1 2 3 7 4 5 6 5 6 5 1 8 131 L 12 36 1 6 3 7 4 5 6 5 6 5 2 4 131 H 12 36 1 6 4 5 6 6 5 6 5 2 4 151 L 15 45 1 9 3 7 4 5 6 5 6 5 2 4 151 H 15 45 1 9 4 5 6 6 5 6 5 2 4 72 H 2x35 25 2x0 5 2x2 2x2 2x3 2 3 2 x 0 6 102 L 2 x 5 3
45. electrical panel is as indicated in the electrical wiring diagram and the installation manual 35 Check connection of LAN cable as indicated in the electrical wiring diagram and the installation manual 36 Check wiring of the LAN opening and terminating resistance 37 Check that wiring of the RS485 board follows the electrical diagram and the installation manual 38 Check wiring of the terminating resistance of the RS485 network CIRCUIT REFRIGERANT CHARGE 39 DESCRIPTION TYPE KG Charging refrigerant during the testing start up phase 40 Possible field integration NOTES ON ANOMALIES ENCOUNTERED DURING CHECKS Page 58 of 72 10 APPENDIX 3 FAULT DIAGNOSIS WARNING BEFORE CARRYING OUT ANY PROCEDURES ON THE UNIT SET THE MAIN SWITCH TO POSITION O This chapter contains information to assist the operator in tracing any faults that may arise with the machine Starting with a description of the nature of the problem we provide indications on the probable causes and possible solutions The causes described are generic and therefore also apply to the most complete versions of the machine it is the task of the operator to determine which part of the information provided applies to the machine in question All servicing and repair of the machine must be carried out by qualified personnel only We strongly recommend that you do not atte
46. emented by the low pressure sensor when the compressor is activated At external temperatures below this level and above all in the event of lengthy periods of non use of the refrigeration circuit the temperature of the liquid refrigerant can become so low that in spite of the abovementioned delay the low pressure sensor trips on compressor start up thus making starting impossible In order to overcome this inconvenience a condenser flooding valve is installed on the refrigeration connections of the air cooled condenser as well as an oversize liquid receiver and a non return valve on the discharge pipe When the condensation temperature falls below 40 C the valve closes the condenser outlet flooding it and reducing the heat exchange proportionally The refrigerant that bypasses the condenser is gaseous and at high temperature it mixes with the liquid refrigerant at very low temperature at the condenser outlet so that the resulting temperature is high enough to permit successful system start up The volume of refrigerant present in the circuit must therefore be sufficient to be able to almost completely flood the condenser coil During summer operation however the condenser coil must be almost completely free of liquid refrigerant in order to perform correctly An oversize receiver is therefore installed in order to accommodate in summer the extra amount of refrigerant that is required in winter to flood the condenser LT KIT FOR OCA UCA
47. er frame members of the unit Fixing bracket To install the brackets proceed as follows 1 Fix the brackets to the aluminium frame of the unit using self tapping screws 2 brackets should be positioned centrally on each side of the unit and fixed with two self tapping screws 3 Position the seal supplied along the edges of the plenum plinth 4 Position the plenum duct section making sure that the aluminium sections are properly aligned 2 3 2 INSTALLATION OF THE ADJUSTABLE PLINTHS The plinths are installed as follows 1 Position the plinth on the finished floor surface 2 Adjust the vibration damping feet to ensure that the plinth is flush with the finished floor surface and perfectly level 3 Position the unit on the plinth making sure that the aluminium sections are properly aligned with each other Raised floor Falso Pavimento Sr Mounting frame Sottobase j HL u Plinth positioning Page 16 of 72 2 4 EXTERNAL FILTERED AIR ACCESSORY The external filtered air intake accessory makes it possible to connect a duct for feeding external air to the unit The external filtered air intake is arranged on the right side panel or inside of the technical service compartment for the units where it is foreseen For the exact values of the dimensions indicated in the figure refer to the following table and in every case to the drawings supplied
48. erified that the quantity of oil in the compressor sight glass is not at a proper level that is able to guarantee good operation it may be necessary to integrate a small quantity of lubricant oil If that were to happen it is necessary to integrate a type of lubricant oil that has the following characteristics TYPICAL CHARACTERISTICS Viscosity 40 cSt 68 Viscosity 100 cSt 8 7 Viscosity Index 100 Ignition Point C 260 Freezing Point C 39 Page 36 of 72 4 3 6 PRESSURE REGULATOR CEA CONDENSERS ACCESSORY TECNAIR LV installs speed regulators for CEA remote condenser fans inside the actual unit Except for CEA C implementation Therefore after installation of the refrigeration circuit for the units the unit and the external condenser need to be connected electrically The regulators are supplied calibrated for a condensation pressure of 19 bar Adjust the condensation pressure using the relevant screw so that the condensation temperature as read on the gauges stabilises around the desired pressure value Speed adjustment of the fans and consequently the condensation pressure takes place in accordance with the model installed as listed in the table XGE type regulator aifectres voltage RHS VI ores 360 a 1 turn KAGE amp approx approx 16 bar type regulator 12 bar Fresmere karl nek e Min speed Min speed Effective Voltage R
49. es the danger of possible refrigerant leaks that would compromise the correct operation of the system 4 2 7 SEAL TEST OF THE REFRIGERANT CIRCUIT WITH NITROGEN PRESSURISATION Once the refrigerant circuit is completed a verification of soldered joints and union fittings by way of nitrogen pressurisation is recommended A reminder that units are tested with nitrogen pressure at 3 MPa and shipped with 0 3 MPa nitrogen pressurisation It will therefore only be necessary to verify pressure during installation CEA air condensers are tested with 3 MPa nitrogen pressurisation and shipped discharged for standard implementations and must therefore be pressurised along with the circuit that was made during installation pressurised with 0 3 MPa nitrogen and therefore only the pressure only needs to be verified during installation The test pressure for systems is shown on the specific pressure gauge of the kit and is the following From 4 0 to 4 2 for R410A systems e From 2 8 to 3 2 MPa for R22 and R407C systems Page 31 of 72 CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 4 3 REFRIGERANT EMPTYING AND LOADING OPERATIONS WARNING Remote condenser air conditioners are shipped pressurised with a nitrogen charge 0 3 MPa Air cooled condensers are shipped non pressurised The air condensers are for LT implementations and shipped pressurised with nitrogen 0 3 MPa
50. ggests dimension values for the electricity line and the corresponding protective devices The power supply must be within the following limits in order to avoid possible malfunction of the installed components according to EN 60654 2 amp EN 61000 4 11 standards o Voltage tolerance limits 15 o Frequency tolerance limits 2 The power supply line from the external differential thermal magnetic circuit breaker to the machine must be direct without any interruptions or junctions The thermal magnetic circuit breaker whose installation is responsibility of the Customer is necessary to protect against over currents the power supply line Article 7 2 1 and 7 2 6 of the CEI EN 60204 1 Standard it must be located as close as possible to the machine The thermal magnetic circuit breaker must be equipped with a residual current device RCD with a trip setting of 30 300 mA to provide personal protection against both indirect and direct contact in addition to thermal and magnetic overload protection The RCD serves also to protect the air conditioner against insulation failure The earth connection must be made with a conductor with a minimum cross section as indicated in the electrical wiring diagram To prevent operating problems with the microprocessor controls it is necessary that no other loads pumps condensers etc even those that are part of the same system are connected downstream of the main switch for the air conditioner
51. gh pressure control switch 25 Check operation of the low pressure control switch 26 Check the compressor operating temperature WATER CIRCUIT CHECKS DESCRIPTION POSITIVE NEGATIVE 27 Check that the inlet and outlet of the hot and cold water supplies conform with the arrows marked on the fittings 28 Check that all liquid supply pipes have manual shut off taps just outside the machine and that these taps are open 29 Check that the condensate drain outlet does not have taps or sections with upward gradients 30 Check that the humidifier supply fitting is connected to the mains drinking water supply and that it is provided with a manual shut off valve just outside the machine 31 Check that the hardness of the supplied water is between 10 and 40 French degrees Page 57 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE ELECTRICAL POWER SUPPLY CHECKS 32 DESCRIPTION POSITIVE NEGATIVE Check the connection of the three phases neutral and earth 33 Check that the power supply voltage and frequency tolerance limits are within the range of 15 and 2 respectively VERIFY CONNECTIONS TO ROOM PROBE REMOTE TERMINALS LAN AND RS485 SERIAL BOARD 33 IF PRESENT DESCRIPTION POSITIVE NEGATIVE Check positioning of the room probes as described in the installation manual 34 Check that electrical connection between the sensors and the
52. h refrigeration circuit require that the units are powered on for at least two hours prior to the arrival of the technician in order to allow the compressor s crankcase oil heater to reach working temperature and allow evaporation of any refrigerant deposited in the compressor so as to ensure that the compressors function correctly The crankcase heaters switch on automatically when the machine is powered on REFRIGERATION CIRCUIT CHECKS DESCRIPTION POSITIVE NEGATIVE 1 Check the discharge pipe diameter conforms with the indications in the installation manual 2 Check horizontal sections of the discharge and return pipes have a gradient of at least 1 in the direction of refrigerant flow Check that siphons are installed at the lowest point of each rising pipe and every 3 m 3 along rising pipe sections well as a counter siphon at the highest point of the rising pipe 4 Check the non return valve is installed as near as possible to the compressor with the aperture in the direction of refrigerant flow pipes longer than 5 m 5 Check the non return valve is installed as near as possible to the compressor with the aperture in the direction of refrigerant flow pipes longer than 10 m 6 Check that the discharge pipe is insulated in the sections where accidental operator contact is possible pipe temperature in operation approx 70 80 C 7 Checks that support brackets are installed on the discharge pipe every
53. ification of the equipment unless expressly authorised by the manufacturer is deemed improper Any injuries or damage sustained as a result of improper use shall be the sole responsibility of the user THE INSTRUCTIONS IN THIS MANUAL ENABLE ADEQUATE MANAGEMENT BY THE USER AND GUARANTEE EFFICIENT UNIT OPERATION FOR MORE DETAILED INSTRUCTIONS REFER TO THE TECHNICAL MANUALS PROVIDED IN THE I T MEDIA SUPPLIED WITH THE UNIT LEGGI E CONSERVA gt QUESTE ISTRUZIONI 4 READ AND SAVE THESE INSTRUCTIONS WARRANTY TECNAIR LV air conditioners are subject to the following warranty conditions which are automatically deemed to have been understood and accepted by the customer at the time of placing the order TECNAIR LV guarantees that the products supplied are well made and of good quality It undertakes during the period of warranty specified herein to repair or to replace with new at its own discretion in the shortest time possible any parts found to present recognised defects in materials construction or workmanship that render them unfit for the intended use provided that these faults are not the result of negligence on the part of the purchaser neglect or inexperience of the user normal wear and tear damage caused by third parties acts of God or other causes not arising from manufacturing defects TECNAIR LV however shall not be liable to compensation for direct or indirect damage of any nature incurred for any reason
54. ipment SECURITY STANDARDS This equipment is exclusively meant for professionally prepared operators that know the fundamentals of cooling cooling systems cooling gasses and the possible damages that pressured equipment may cause Carefully read this manual carefully observing the procedures shows is an essential condition for operator safety integrity of the equipment and the consistency of declared performance The compressor must exclusively operate with refrigerants indicated by the manufacturer Oxygen must never be allowed to enter the inside of the compressor Do not start up the compressor when there are significant vacuum conditions inside of it During the various operations refrigerant must never be dispersed into the environment such precautions besides being required by international environmental protection standards is absolutely necessary in order to avoid that the presence of refrigerant in the room may render finding possible leaks very difficult Avoid inhaling refrigerant fumes Do not tamper with or modify the calibration of safety and control systems Wearing suitable protections such as safety glasses and gloves is recommended some unit components may cause physical damage to the operator Page 6 of 72 RECOMMENDED EQUIPMENT AMERICAN TYPE HEAVY DUTY PIPE WRENCH Minimum nominal size 2 2 ADJUSTABLE WRENCH SLOTTED SCREWDRIVER PHILLIPS SCREWDRIVER TORX SCREWDRIVER PIPE BENDI
55. l pressure switches Check the system operates correctly Check the display LEDs and the alarm status Check the mother board connections Check the control and display boards Check that the unit s sensor readings are correct Check the condition of the cylinder Carry out the automatic cylinder washing procedure Check the condition of the filling and drain valves Carry out manual washing with limescale preventer Inspect the gaskets seals Replace if necessary Check the unit is receiving power correctly Check the electrical connections Check the power consumption of electrical components Test safety devices Replace protection fuses Check circuits for leaks Bleed air from circuits Check circuit temperatures and pressures Check operation of the 3 way valve Check the amount of glycol in the circuit Check the water circulates correctly Check the operating temperatures and pressures Check the condition of the compressor Check the condition of the liquid sight glass filter Check operation of the safety devices Check the calibration and operation of the control valves Check the refrigerant charge level and for circuit leaks Check the lubricating oil level Check the condition of the remote condenser Check the calibration of the remote condenser regulator CONDENSERS Check that the remote condenser is receiving power correctly Check the pressure controlled valve of the water cooled condenser Check the condenser water circulates corre
56. les with resulting leaks of water into the tray To prevent this problem increase the frequency of checks halving the intervals between maintenance procedures 6 1 6 CYLINDER REPLACEMENT To replace the humidifier cylinder the following instructions must be observed as well as full compliance with safety obligations regarding use of the equipment Drain all water from the cylinder using the relative function Set the main switch to O Open the front panels via the relevant safety locks Slide out the cylinder steam tube Detach the electrical connections from the top of the cylinder Release the cylinder from its fixture and lift to remove Connect the new cylinder and secure to the support Close the front panels and return the main switch to I ep OD Ae I B No Description 1 QLoadbeanngstructue 3 solenoid 4 90 positionable drain coupling as 5 Filling tank conductivity meter Page 49 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 6 2 MAJOR MAINTENANCE 6 2 1 MAINTENANCE OF THE FANS Fan maintenance procedures must be carried out in conditions of maximum safety and always with the unit switched off During maintenance check the following e Periodically check that the fan blades are clean and remove all dirt and encrusted deposits that co
57. lete bleed the air from the supply pipe for approximately 30 minutes channelling the water directly to the drain pipe without letting it enter the humidifier This will eliminate any waste or entrata acqua tubo 9 interno 6mm linstallatore rubble which could block the filling valve and or create water inlet connection to be made by the installer foam during boiling with a tube internal 6mm uscita acqua water discarge 3 5 1 CHARACTERISTICS OF THE WATER CIRCUIT AND THE SUPPLY WATER The humidifier must be supplied with aqueduct water The water connection should satisfy the following conditions shut off cock 1 previous Figure must be installed on the water supply pipe e A50y mechanical filter 2 previous Figure must be installed on the supply line Pressure between 0 1 and 0 8 MPa 1 8 bar 14 5 116 PSI Temperature between 1 and 40 C Instantaneous flow rate no lower than the nominal flow rate of the supply solenoid valve 0 6 1 2 LIMIT VALUES FOR SUPPLY WATER WITH CONDUCTIVITY VALUES FOR LIMITS AN IMMERSED ELECTRODE DEHUMIDIFIER IN THE MID HIGH RANGE Min Max Hydrogen ion activity pH 7 8 5 Specific conductivity at 20 C oR 20 C 5 300 1250 Total dissolved solids TDS 1 1 Fixed residue at 180 C mg l 1 7 Total hardness TH CaCO 100 2 400 Temporary hardness CaCO 60 3 300
58. mpt any procedures on the machine unless you have a good understanding of its operating principles Key to the fault diagnosis diagram GUASTO INTERVENUTO FUNZIONE CAUSA RIMEDIO Page 59 of 72 D le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 10 1 VENTILATION PROBLEMS NO AIR FLOW INTERVENTION OF THERMAL PROTECTION DUE TO HIGH LEVELS OF POWER CONSUMPTION WATER FLOW SWITCH BLOCK eeosososscssosoccecseceesceoseedesceescecceesceseocscescessooceo sees OPERATION WITH DIRTY PANELS FILTERS MECHANICAL NOARR BREAKDOWN feeossessceocceccececeeoqeeveceeeecceoocseeose ovosoovceccececeeccccemqeoocececeoscecceceee CLOSE THE CLEAN PANNELS FILTERS MEUM CHECK CALIBRATION AND AERAULIC OPERATION CIRCUIT AND DIRECTION OF FAN ROTATION LOW POWER HIGH AIR HIGH AIR SUPPLY FLOW LEVEL U TEMPERATU VOLTAGE U RE LEVEL REPLACE IT 9 00 0On 0 0 eesssessevsssvseeveeeece eceecececcceccecccccec REDUCE THE CREATE AIR FLOW RATE MEASURE IF SPEED MODIFYING ADDITIONAL IS TOO LOW THE ELECTRICAL LOAD LOSSES 2 IN THE AIR CIRCUIT Page 60 of 72
59. n operation therefore the user must ensure that all installation procedures are completed correctly It is recommended that such operations are carried out with a minimum room temperature tat is equal to the one included in the operational limits table A lower temperature may compromise the actual circuit charge In order to charge completely proceed as follows keeping in mind that the coolant must always be charged in liquid phase 1 Make sure that circuit cocks are completely opened 2 Connect pressure gauges as shown in the example diagram 3 Verify that the refrigerant tank is compatible with what the unit requires R407C R410A 4 Position the refrigerant tank on the calibrated scales 5 Connect the refrigerant tank to the pressure gauge unit 6 Position the pressure gauge unit to complete the charge 7 Open the filling valve until the gauge reaches a pressure of 6 7 Bar 8 Turn on the unit fans and compressors 9 Open the filling valve to insert refrigerant until it approximately reaches the calculated quantity 10 Verify overheating and operational parameters in order to evaluate the charge 11 Open and close the filling valve in order to integrate small quantities of refrigerant COMPRESSORE COMPRESSOR REFRIGERANTE REFRIGERANT MANOMETRI MANOMETERS POMPA VUOTO VACUUM Page 35 of 72 le CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE
60. n the following figure paying attention that the detection portion is positioned correctly qaan Flood detector Probe dimensions TECNAIR LV UNIT SONDAJPROBE SONDA PROBE Probe connection Page 42 of 72 5 5 CONNECTION OF THE LOCAL NETWORK ACCESSORY To create a local network simply connect the SURVEY circuit boards via the connectors with extractable terminals on the mother board using a cable with the following characteristics see electrical wiring diagram for further information Cable cross section Resistance Max length Twisted pair cable with GND AWG20 22 cross sect min 0 2 mm2 max 1200 0 25W 1 000 m 2 5 mm2 2 5 mm2 he 1 amp Fa k 2 ki a e 75 m Da collegare sulla prima ed ultima unit della rete to be connected on the first and last unit of the network Local network connection example WARNING DO NOT CREATE BRANCHES DO NOT LAY WITH POWER CABLES Ca Min 10 15 cm N Z m Page 43 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 5 6 MODBUS SERIAL CIRCUIT BOARD RS485 ACCESSORY SURVEY microprocessors may be fitted as part of a supervisory and or remote assistance network adopting the Modbus RS485 standard through a serial circuit board optional The serial communication protocol used has the following chara
61. ndensers must be installed in accordance with the following instructions HORIZONTAL INSTALLATION SINGLE ROW Remove the condenser from the packaging Fit the fixing brackets 2 to the condenser 1 Position the condenser horizontally 4 on support 3 Fix the feet 5 using the screws provided 6 1 Remove the fixing screws 2 from the packaging 1 and remove the condenser 3 2 Position the condenser horizontally on a support 4 3 Remove the fixing brackets by undoing the D Ub relevant screws 5 m i f 4 Fix the feet 6 using the screws provided 5 VERTICAL INSTALLATION SINGLE ROW 1 Remove the condenser from the packaging 2 Position the condenser 1 3 Fix the brackets using the screws provided 2 Remove the fixing screws 2 from the packaging 1 and remove the condenser 3 Position the condenser 4 Fix using the screws provided 5 Non adattare la posizione per il trasporto Posizionedi Installazione dei collettori alla linea ipping position Installation position le transport Position pour l installation Do not adapt headers position P Installationsposition to the suction line Ne pas adapter la position du collecteurs la ligne Sammlerposition nicht an Leitung anpassen SI YES OUI JA Page 18 of 72 U 4 922 Tess Z SS N m ie i ib Pt tT TT TTA ILE ETT 3 An
62. on the type of positioning 4 2 1 DIAMETERS OF REFRIGERATION CIRCUIT CONNECTION PIPES Use the following table to determine the recommended diameters for the supply and return pipes in accordance with the machine size given by the numerical sequence in the product code Compressor Pipes up to 15 m long Pipes beyond 15 m long Size 0 Liquid mm 0 Liquid mm 21 2 6 12 14 3 10 12 14 16 10 12 31 3 10 14 16 10 12 16 18 10 12 41 3 5 11 14 16 10 12 16 18 10 12 51 5 15 16 18 10 12 20 22 3 14 16 71 6 5 22 16 18 10 12 20 22 14 16 81 7 5 24 20 22 14 16 26 28 14 16 101 10 30 20 22 14 16 26 28 16 18 131 12 40 26 28 16 18 26 28 16 18 151 15 45 26 28 16 18 26 28 20 22 72 2 x 3 5 25 2 x 14 16 2 x 10 12 2 x 16 18 2 x 10 12 102 2 5 30 2 x 16 18 2 x 10 12 2 x 20 22 2 x 14 16 142 2 x 6 5 42 2 x 16 18 2 x 10 12 2 x 20 22 2 x 14 16 162 2 x 7 5 45 2 x 20 22 2 x 14 16 2 x 26 28 2 x 14 16 202 2 x 10 64 2 x 20 22 2 x 14 16 2 x 26 28 2 x 16 18 262 2 12 75 2 x 26 28 2 x 16 18 2 x 26 28 2 x 16 18 302 2 15 90 2 x 26 28 2 x 16 18 2 x 26 28 2 x 20 22 Innerlouter diameters of refrigerant pipes 90 45 180 90 Diameters Equivalent metres m 10 12 0 50 0 25 0 75 2 10 1 90 12 14 0 53 0
63. r to prevent the condenser from becoming clogged by impurities in the water To ensure that circuit pipes are installed correctly we recommend that the following indications are observed Use pipes made of copper or steel Support pipes with suitable brackets 1 Insulate both pipes with Armaflex type insulation 2 Install shut off valves to facilitate maintenance 3 Install a Thermometer 4 and Pressure gauge 5 on the inlet and outlet Install a drain outlet at the lowest part of the circuit 6 Install a 50 mechanical filter on the supply line 7 Use a water glycol solution where necessary Page 23 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 3 4 HYDRAULIC CONNECTIONS FOR FREE COOLING AND TWO SOURCES UNITS 3 4 1 FREE COOLING UNITS The water circuits of Free Cooling type units are provided made by TECNAIR it will be necessary to complete the water connection to and from the external Dry Cooler with the related circulator or circulation pump and expansion chamber The water inlet and outlet unions are highlighted with self adhesive labels applied on the actual unions 3 4 2 TWO SOURCES UNITS The water circuits of Two Sources type units are identical to what is included in the previous chapters Based on the type of primary and secondary source it will be possible to have one or two water connections with modulating valves or ON OFF type ones To complete those conne
64. rature or humidity within which a device is switched on and at the same time defines the values at which the device is switched on and off Supply the air delivered to the room by the air conditioner Screen the screen appearing on the display Ramp the operating range of a variable valve from 0 to 100 Range range of values that may be assumed by a parameter Return Suction air from the controlled environment returned to the air conditioner Setpoint defines the temperature or humidity value to which the system is set the system activates the heating or cooling devices until the temperature or humidity in the controlled environment matches the setpoint value 3 point valve modulating valve the 3 point valve is a commonly used valve that is operated by 2 relays one to control the opening and one to control the timed closing of the valve the modulating valve is controlled by a signal with voltage varying from 0 to 10 V Dead band neutral band define a very narrow temperature range between the setpoint and the proportional band within which the control devices are not operated Page 69 of 72 CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 12 NOTES Page 70 of 72 Klimatimport www tpiab com info tpiab com TECNAIR LV CLOSE CONTROL AIR CONDITIONING Eos Cat z73
65. uld affect the balance of the rotor and thus damage the bearings e Check that the cooling fins of the fan motors are clean If the fans produce any unusual noises during operation switch off the machine and identify and rectify the problem replacing the fan or the motor if necessary 6 2 2 REFFRIGERATION CIRCUIT MAINTENANCE The refrigeration circuit does not require any maintenance other than the periodic checks indicated in the chapter Start up The first of these checks is to look for leaks as indicated by the presence of small bubbles visible in the liquid viewed through the sight glass The cooling coil must be inspected and if necessary cleaned with hot soapy water using a brush with long soft bristles Compressed air may also be used provided that it is free of oil 6 2 3 MAINTENANCE OF THE ELECTRIC HEATER It is sufficient to check that the battery is clean and that the power consumption in Amps is as specified by the technical data sheet If the machine is equipped with a modulating electric heater it is advisable to also check occasionally that the modulator is functioning correctly To do this it is sufficient to check that the machine behaves correctly during heating operation with the corresponding screen showing a voltage of 0 10 V for the microprocessor output to the modulator See User manual 6 2 4 MAINTENANCE OF THE ELECTRICAL PANEL Clean using a compressed air jet at a minimum distance of 30 cm to avoid damaging plastic
66. x jet d eau en ventail klinge mantener a choro do agua pressione acqua F magier keep the water spray at pression d eau P masier Wasserdruck P mice 2 perpendicular al borde da la mantenere il getto d acqua right angles to the fin edge of projetter l eau perpendicu Den Sprohsirahl beide aleta del paquete aletaado perpendicelare al filo aletta del tha both vertically and hori lairormont aux allettos dans Richtungen senkrecht zur en ambos sontkdos alettato dua sans zontally las deux sens Lamallanreiha das Warmnetau scherblocks halten Page 51 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 7 DEACTIVATION DISASSEMBLY AND SCRAPPING WARNING BEFORE CARRYING OUT ANY PROCEDURES ON THE UNIT SET THE MAIN SWITCH TO POSITION O TECNAIR LV air conditioners must only be dismantled by specialised technical personnel In any case the following points must be observed e Switch off the air conditioner first using the microprocessor e Open the machine s main door lock switch Open the external thermal magnetic circuit breaker to isolate the air conditioner from the electrical power supply The refrigerant contained in the air conditioner should be disposed of in accordance with the waste disposal and safety regulations applicable in the country of installation Disconnect where applicable the refrigerant lines the water
67. y adjusting the fixing screws Replace clogged filters with clean or regenerated versions Position the support and secure using the fixing screws Close the front panels and return the main switch to I D prd UCA UCU OCA OCU Air filter position Page 47 of 72 lev CLOSE CONTROL AIR CONDITIONERS INSTALLATION USE AND MAINTENANCE 6 1 3 REPLACING THE EXTERNAL AIR INTAKE FILTERS To replace the air filters the following instructions must be observed as well as full compliance with safety obligations regarding use of the equipment Set the main switch to 0 Remove the external air duct from the specific brackets Remove the brackets using the specific screws Replace clogged filters with clean or regenerated versions Position the supports and secure them using the fixing screws Reconnect the external air duct and bring the main switch to the 1 position m m Units with filtered external air intake External air Filter Duct supports External Air Filter 6 1 4 CONTROL MICROPROCESSOR MAINTENANCE The microprocessor requires periodical controls to verify operational statuses and the presence of possible alarms in components that may compromise proper unit operation This control must take place according to what is contained in the user manual of the installed microprocessor For more detailed and specific information on control procedures please refer to the unit MICROPROCESSO

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