Aermec NRL A E HA HE 0750-1800 Installation Manual
Contents
1. D 210 o iral D Ti L ah o CE 8 Papa ro 9 Fa 1361 lt Wa 1500 qe a ON o o o o D osi lo INJ3 o X i ej 1 i 1 t our3 VESTI La PLUMBING CONNECTIONS FOR HYDRONIC UNIT e lt 4 PLUMBING CONNECTIONS FOR PUMP UNIT gt e UM meet 4 Le PE 2 y 2 E Mer ol ARE A IN Lie Z H gt SERRE 3 5 DUE Li l ss e bg N a 3 SC z O SCA aq e SL gt 3 Zd Y HT A DUT ej ERE m d 1563 349 1361 Yu rd 1500 3000 OE SES gt O Ey g a a x Z e 9 A jo X d A CMT b LER POSITION OF LIFTING POINTS LIFTING POINT 2 LIFTING POINT 1 100 wo le da ic AR LIFTING POINT 3 100 2800 100 LIFTING POINT 4 3400 oa 31 32 19 3 NRL 1250 1400 1500 HIGH EFFICIENCY POSITION OF VIBRATION DAMPERS o 100 1825 1825 p al o nl HI 1825 200 PLUMBING CONNECTIONS FOR HYDRONIC UNIT2. 37 38 EMPTY OPERATING WEIGHT kg CENTRE OF GRAVITY TOTAL WEIGHT CENTRE OF GRAVITY PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS WITH MACHINE OPERATING Yg kg Water Xg Yg 3 4 5 6 20 2 PERCENTAGE WEIGHT DISTRIBUTION ON THE SUPPORTS VERSION HA HE EMPTY OPERATING WEIGHT kg CENTRE OF GRAVITY TOTAL WEIGHT CENTRE OF GRAVITY PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS WITH MACHINE OPERATING Gy kg Water Gy Gx 3 4 5 6 FirjejejejejejejEe EMPTV OPERATING WEIGHT kg CENTRE OF GRAVITV TOTAL WEIGHT CENTRE OF GRAVITV PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS WITH MACHINE OPERATING Gy kg Water Gy Gx 3 4 5 6 39 40 EMPTY
3. 70 000 20 000 30 000 40 000 50 000 60 000 70 000 80 000 90 000 100 000 Water flow rate I h USEFUL HEADS HIGH HEAD VERSIONS HA HE 900 800 I 750 1000 10 000 20 000 30 000 40 000 50 000 60 000 70 000 80 000 90 000 100 000 Water flow rate I h 23 24 131 MAXIMUM MINIMUM WATER CONTENT IN THE SYSTEM 1311 Maximum water content rec ommended Table 13 2 indicates the maximum water content in litres of the hydraulic system compatible with the capacity of the expan sion tank The values shown in the table refer to three conditions of maximum and minimum water temperature If the effective water content of the hydraulic system including the accumulation tank if present is greater than that shown in the operational conditions table an other additional expansion tank must be installed measured using the common criteria with reference to the additional volume of water From tables 13 3 it is possible to obtain the values of maximum system content also for other operational conditions wi
4. 300 1400 250 750 900 S 200 1250 1000 z 800 1500 1650 1800 mi I a p 150 TD v c 2 f 100 c a 50 0 o 10 000 20 000 30 000 40 000 50 000 60 000 70 000 80 000 90 000 100 000 110 000 120 000 130 000 140 000 150 000 Water flow rate h Average water temperature 5 10 15 20 30 40 50 Multiplicational coefficient 1 02 1 0 985 0 97 0 95 0 93 0 91 21 12 USEFUL HEADS USEFUL HEADS LOW HEAD VERSIONS A E 70 000 20 000 30 000 40 000 50 000 60 000 70 000 80 000 90 000 100 000 Water flow rate I h USEFUL HEADS HIGH HEAD VERSIONS A E 750 900 10 000 20 000 30 000 40 000 50 000 60 000 70 000 80 000 90 000 100 000 Water flow rate I h USEFUL HEADS LOW HEAD VERSIONS HA HE 1800 1650 4500 750
5. VERSION 00 me gt HOLE FOR POWER SUPPLY et e ela c7 7 ju ki Os 92 aq L m z f N Loa U ca O IU Lao 3 D S jo m 4 OUT 1564 358 3850 7 9 POSITION OF LIFTING POINTS i 100 3650 100 LIFTING POINT 1 LIFTING POINT 2 al o a a o FR Lra POINT 3 LIFTING POINT 4 4250 19 4 NRL 1650 1800 HIGH EFFICIENCY POSITION OF VIBRATION DAMPERS VERSION L 00 5750 8 900 HOLE FOR POWER SUPPLY x 8 Jo o T 9 ET E cc o estlkt urine 5 CE 18 3 2675 1825 900 1825 ao 8 400 UL ji PLUMBING CONNEGTIONS FOR PUMP UNIT PLUMBING CONNECTIONS FOR HYDRONIC UNIT A T T E Cw pela pem pecu T
6. IB 2190 2450 A En O g M DE Fie I 140 E 7 u F JON qe r 2 vers D X T X q ce ET CE o A Our RI 1112 I 2676 5350 e IIT EEE arri L 11 I Oi L dl Lo of I IOO i rr PS E POSITION OF LIFTING POINTS 274 ACH 500 146 384 ACH 500 134 442 ACH 500 4146 492 ACH 500 134 LIFTING POINT 4 LIFTING POINT 2 LIFTING POINT 1 LIFTING POINT 3 550 1100 1 2050 ANT sl 1100 LS 2050 i 1100 ssa 2200 LIFTING POINT 7 LIFTING POINT 8 LIFTING POINT 5 LIFTING POINT 6 33 34 19 5 NRL 0750 DESUPERHEATER HIGH EFFICIENCY munns 19 6 NRL 0800 0900 1000 1250 1400 1500 1650 1800 DESUPERHEATER HIGH EFFICIENCY et et
7. AERMEC TECHNICAL MANUAL FOR INSTALLATION AND MAINTENANCE Chillers heat pumps with scroll compressors A HIGH EFFICIENCY E HIGH EFFICIENCY LOW NOISE OPERATION HA HIGH EFFICIENCY HEAT PUMP HE HIGH EFFICIENCY LOW NOISE HEAT PUMP C EUROVENT CERTIFIED PERFORMANCE AERMEC COMPANY QUALITY SYSTEM ICIM SK 195kW 469kW 712 165 kW 472 kW ISO 9001 2000 Cert n 0128 5 AERMEC S P A INHLPY O110 4086806 03 Dear customer thank you for choosing an AERMEC product lt is the fruit of many years of experience and special design studies and has been made of the highest grade materials and with cutting edge technology In addition all our products bear the EC mark indicating that they meet the requirements of the European Machine Directive regarding safety The quality level is being constantly monitored so AERMEC products are synonymous with Safety Quality and Reliability The data may undergo modifications considered necessary for the improvement of the product at any time and without the obligation for any notice thereof Thank you once again AERMEC S p A AERMEC S p A reserves the right at all times to make any modification for the improvement of its product and is not obliged to add these modification to machines of previous manufacture that have already been delivered or are being built CONTENTS 44 4 2 4 3 51 5 2 5 3 5 4 5 5 5 6 5 8 5 9 74 72 81
8. Disposal Disconnecting the unit Dismantling and disposa mproper use mportant safety information Refrigerant gas R410a i e 51 To install the unit please observe the safety warnings included in these instructions QU Danger moving parts Danger high temperature A Danger power supply Danger cut off power supply General danger gt Useful information and warnings AERMEC S p A 37040 Bevilacqua VR Italy Via Roma 996 Tel 39 0442 633111 Telefax 0442 93730 39 0442 93566 air conditioning www aermec com info aermec com SERIAL NUMBER CONFORMITY DECLARATION We the undersigned declare on our own exclusive responsibility that the object in question so defined NAME NRL TYPE AIR WATER CHILLER HEAT PUMP MODEL and to which this declaration refers complies with the following standardised regulations CEI EN 60335 2 40 Safety regulation regarding electric heat pumps air conditioners and dehumidifiers CEI EN 61000 6 1 CEI EN 61000 6 3 CEI EN 61000 6 2 CEI EN 61000 6 4 Electromagnetic immunity and emission in residential environment Electromagnetic immunity and emission in industrial environment EN378 Refrigerating system and heat pumps Safety and environmental requirements UNI EN 12735 Round welding free copper pipes for air conditioning and cooling UNI EN 14276 Pressure equipment for refrigerating systems
9. Correctly connect the power sup ply and the earthing Check the hydraulic connections Check the water pump works properly Clean the water filters Check that the condenser coils are not dirty or clogged Check the correct rotation of the fan unit 29 REFRIGERANT GAS R410A CHEMICAL NAME CONCENTRATION 96 Difluoromethane R32 5096 Pentafluoromethane R125 5096 PHVSICAL AND CHEMICAL PROPERTIES Physical form Liquefied gas Colour Colourless Odour Ethereal PH neutral at 25 C Boiling point interval 52 8 C 63 F Flash point not inflammable Vapour pressure 11 740 hPa at 25 C Vapour pressure 21 860 hPa at 50 C Relative density 1 08g cm3 Solubility Water 015g 100ml DANGER IDENTIFICATION if the skin comes into contact with the quickly evaporating liquid this may cause the tissues to freeze High vapour concentrations can provoke headaches dizziness sleepiness nausea and also lead to lipothymia irregular heartbeat arrhythmia FIRST AID MEASURES General information If the person is unconscious place him on his side in a stable position and call a doctor Do not give anything to eat or drink to persons who have fainted If the breathing is irregular or has stopped practise artificial respiration If the disturbances persist contact a doctor Inhalation In the event of inhalation
10. Sa Kd 3 4 L 4 d DI LA L 1 Li U U 1 L 1 U 1 U 1 I 1 1 1 M LI x 1 k t U ms x Po 4 Sen s 4 y a gt Y 2 3o g b Cd a n est 8 304 250 1230 234 2 20 WEIGHT DISTRIBUTION AND CENTRES OF GRAVITY Gx 201 PERCENTAGE WEIGHT DISTRIBUTION ON THE SUPPORTS VERSION A E EMBTY OPERATING PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS CENTRE OF CENTRE OF WITH MACHINE OPERATING WEIGHT Gravity TOTAL WEIGHT GRAVITY a kg Gy kg Water Gy Gx 3 4 5 6 36 EMPTY OPERATING CENTRE OF GRAVITY TOTAL WEIGHT CENTRE OF GRAVITY PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS WITH MACHINE OPERATING Yg kg Water Xg 3 4 5 6 EMPTY OPERATING WEIGHT kg CENTRE OF GRAVITY TOTAL WEIGHT CENTRE OF GRAVITY PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS WITH MACHINE OPERATING Xg Yg kg Water Xg Yg 3 4 5 6
11. OPERATING WEIGHT kg CENTRE OF GRAVITY TOTAL WEIGHT CENTRE OF GRAVITY PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS WITH MACHINE OPERATING Xg Yg kg Water Xg Yg 3 4 5 6 gt gt ERI gt gt gt gt gt EMPTY OPERATING WEIGHT kg CENTRE OF GRAVITY TOTAL WEIGHT CENTRE OF GRAVITY PERCENTAGE WEIGHT DISTRIBUTION ON SUPPORTS WITH MACHINE OPERATING 95 Xg kg Water Xg Yg 4 5 6 41 42 21 SAFETY WARNINGS AND REGULATIONS Safety warnings The unit must be installed by an au thorised and qualified technician in compliance with the national legisla tion in force in the country of desti nation MD 328 2004 We shall not be held responsible for any damage whatsoever resulting from the non compliance with these instructions e Before starting any kind of work it is necessary TO READ CAREFULLY THE INSTRUCTIONS AND TO PER FORM THE SAFETY CHE
12. cal wires and their insulators Check the functioning of the evapo rator heater and the compressor casing N Mechanical checks Check the screws on the fan grilles and the fans themselves are firmly tightened as well as the compressors and the electric box and the outer pan elling of the unit If they are poorly tight ened they produce abnormal noise and vibrations Check the structure conditions If necessary treat oxidised parts with paints suitable for eliminating or reduc ing oxidation N Hydraulic checks Clean the water filter Eliminate the air from the circuit Check the water flow rate to the evaporator is always constant Check the state of the hydraulic pip ing thermal insulation Check the glycol percentage when present 27 2 DISMANTLING AND DIS POSAL In the dismantling phase the fan the motor and the coil if operating could be taken from the specialised centres for possible reuse NB For lo dismantling disposal all the materials must be sent to the authorised centres in compliance with the national regulations in force For further information on dis charge contact the head office The device is designed and built to en sure the maximum safety in its immedi ate vicinity IP24 as well as to resist atmospheric agents The fans have protection grilles to prevent the unwanted intrusion of foreign bodies The accidental opening of the electric panel with the
13. 62A 40A 40A 51A 51A 62A 62A 62A 40A 40A 51A 51A 62A 62A 62A 62A 62A HIGH PRESSURE SWITCH WITH MANUAL RESET PA bar 40 40 40 40 40 40 40 40 40 High pressure transducer TAP bar 39 39 39 39 39 39 39 39 39 LOW PRESSURE TRANSDUCER TBP bar CHILLER CIRCUIT SAFETY VALVE AP bar 45 45 45 45 45 45 45 45 45 BP bar only in heat pump 30 30 30 30 30 30 30 30 30 No of fans A No of fans E No of fans HA No of fans HE 28 78 DIMENSIONS 181 NRL 0750 0800 0900 1000 1250 1400 1500 1650 1800 MOD VERSIONS A mm B mm C mm 0750 AEHAHE 1500 4350 1975 0800 AEHAHE 2200 3400 2450 0900 AEHAHE 2200 3400 2450 1000 AEHAHE 2200 3400 2450 1250 AEHAHE 2200 4250 2450 1400 AEHAHE 2200 4250 2450 1500 AEHAMHE 2200 4250 2450 1650 AEHAHE 2200 5750 2450 AS 1800 AEHA HE 2200 5750 2450 ie The drawings shown here only represent an example of the machine 18 2 MINIMUM TECHNICAL CLEARANCES ma 7 4 md Y l pw h 4 29 194 NRL 750 HIGH EFFICIENCY 19 POSITION OF PLUMBING CONNECTIONS POS
14. 4 24 5 25 2541 25 2 25 3 26 27 271 272 28 281 29 Safety and check parameter setting 28 Dimensions NRL 0750 080 Minimum technical clearances Position of plumbing connections position of vibration dampers 30 NrI 750 high efficiency 30 NrI 800 900 1000 hig y Nri 1250 1400 1500 high efficiency Nrl 1650 1800 high efficiency Nr 0750 desuperheater high efficiency Nrl 0800 0900 1000 1250 1400 1500 1650 1800 desuperheater high efficiency 34 Weight distribution and centres of gravity 35 Percentage weight distribution on the supports version A E 35 Percentage weight distribution on the supports version HA HE 38 Safety warnings and regulations ccoo 42 Receiving the product 42 Transport and handling 42 Positioning Handling example Hydraulic circuits nternal hydraulic ci nternal hydraulic circuit nrl P1 P2 P3 PA nternal hydraulic circuit nrl 01 02 03 04 05 06 07 08 44 nternal hydraulic circuit nri 09 10 44 Filter maintenance Filter cleaning procedure Lines and electric data for the unit Electrical data GRA control board Connection to the electrical power supply 48 Start up Preliminarv operations 49 Start up s 49 Loading and draining the system sss 49 Maint n nge ide nn nantes iia 50
15. 5 after 28d pidas Policy OCDE 107 Degradation by OH radicals t life 1472d In the air Ozone destruction potential ODP R 11 O Greenhouse effect potential of the halogenated hydrocarbons HGWP R 11 1 013 Bio accumulation Practically non biaccumulable log Pow 0 21 Policy OCDE 107 REGULATIONS INFORMATION EEC Directive Safety cards D 91 155 EEC modified by D 93 112 EEC and D 2001 58 EC Dangerous substances and preparations Dangerous preparations D199 45 EC modified by D 2001 60 EC Not classified as dangerous DISPOSAL Disposal methods Dispose of excess products and those that cannot be recycled via an authorised waste disposal firm Refer to the information provided by the manufacturer supplier with regard to recovery recycling PERSONAL PROTECTION Professional exposure limit Difluoromethane R38 LTEL UK ppm 1000 SYMBOLS 52 z _ _ _ _ _ _ _ _ __ _ gt gt gt _ ______ _ _ _ _ _ GB Contains fluorinated greenhouse gases covered by the Kyoto Protocol R410A Global warming potential 1980 ES Contiene gases fluorados de efecto invernadero regulados por el Protocolo de Kioto R410A Potencial de calentamiento atmosf rico 1980 DE Enth lt vom Kyoto Protokoll erfasste fluorierte Treibhausgase R410A Treibhauspotenzial 1980 FR Contient des gaz effet de
16. 50m For longer lengths the DESIGN ER must size the power supply line and the earthing connection accordingly on the length the type of cable unit absorption its physical position and the room temperature the basis of 24 3 ELECTRICAL DATA Earth NB SECT A SECT B IL MODEL VERSION mme mme Section PER A Check that all power cables are cor en sae ET Eg DE rectly secured to the terminals when 0800 Jen EHE BOE 200A switched on for the first time and after 0900 95mm 5mm 50mm 250A 30 days of use Afterwards check the 1000 a 95mm 5mm 50mm 250A connection of the power cables every 1250 al 120mm 5mm 70mm 315A six months 2 2 2 oo nr pulus omm m Slack terminals could cause the cables 1650 a 2x185mm 5mm 150mm 400A and components to overheat 1800 a 2x185mm 5mm 150mm 400A Key Sect A Power supply Sect B Remote panel Earth Earth to bring to the machine xISeet A Power supply 400V 3N 50Hz only for size 750 IL Main switch Power supply 400V 3 50Hz from size 800 to size 1800 Electrical panel GR3 24 4 GR3 CONTROL BOARD Qo m Our Digital inputs M4 UNA dre r E ni i e m TE i O Rein _ ho i not used M2 z n COE T i merci Display M3 rOr r IB i F ae 1 r3 E
17. 85 2 0 809 3 20 40 6 0 434 1 20 60 6 0 604 2 20 85 6 0 729 3 35 40 6 0 393 1 3596 80 6 0 555 2 35 85 6 0 677 3 Working reference conditions 1 Cooling Max water temp 40 C Min water temp 4 C 8 Heating heat pump Max water temp 60 C Min water temp 4 C 3 Heating boiler Max water temp 85 C Min water temp 4 C H max 1 55 m e a T u a N rI A H 8 a HH H 12 25 m E B EA a H Il 8 H 0m l i S a G be a n e m cs Il S Hmin KEY 1 Check that the highest user does not 8 Check that the lowest user can sustain exceed a level difference of 55 metres the global pressure acting at that point Minimum water content in the case of process applications or operation with low outside temperatures and low load Adjusting the outlet water temperature project At less than 5 C 14 CAPACITY CONTROL 5 Cooling Levels of power capacity Versions 1 2 3 4 5 6 NRL 750 27 53 77 100 z E NRL 800 27 53 77 100 3 NRL 900 27 53 77 100 NRL 1000 27 53 77 100 S NRL 1250 27 53 77 100 NRL 1400 23 44 63 82 100 NRL 1500 19 37 o5 71 86 100 NRL 1650 19 37 99 71 86 100 NRL 1800 19 37 55 71 86 100 Inp
18. BY QUALIFIED PERSONNEL IN ACCORDANCE WITH THE CORRESPONDING REGULATIONS trained and informed about the risks related to such op erations The characteristics of electric lines and related components must be es tablished by PERSONNEL AUTHORISED TO DESIGN ELECTRIC INSTALLATIONS following international regu lations and the national regulations of the country in which the unit is installed in compliance with the legisla tive regulations in force at the moment of installation For installation require ments the wiring lay out supplied with the unit must be compul sory referred to The wiring layout together with the manuals must be kept in good conditions and readily ACCESSIBLE FOR FU TURE OPERATIONS ON THE UNIT It is compulsory to check the machine sealing before con necting the electrical wiring The machine should only be powered once the hydraulic and electric operations are completed The units are fully wired in the factory and therefore only need to be connected to the mains supply You are advised to check the characteristics of the mains supply to ensure it is suitable for the levels indicated in the electric data table also taking into consideration any other equipment that may be operating at the same time 24 2 LINES AND ELECTRIC DATA FOR THE UNIT NB Connection cables are not supplied The cable sections shown in tab 24 2 are recommended for a maximum length of
19. C 46 C 4 2 o 2 4 6 Processed water C 8 10 16 CORRECTION COEFFICIENTS OF THE INPUT POWER IN COOLING MODE Ca cooling mode 14 46 45 C 40 35 C 30 C 25 C 20 C 4 2 0 2 4 6 Processed water C 8 10 9 2 HEATING CAPACITY AND INPUT POWER HEAT PUMP VERSIONS The heating capacity yielded and the input electrical capacity in conditions other than rated conditions are ob tained by multiplying the rated values Pt Pa by the respective correction coefficients Ct Ca The diagram allows you to obtain the correction coefficients in line with each curve you will see the hot processed water temperature to which it refers assuming a difference of temperature between the condenser inlet and outlet water equal to 5 C The outputs are intended as net of the defrosting cycles KEY Ca Correction coefficient of the input power Ct correction coefficient of the heating capacity 9 3 FOR At DIFFERENT FROM THE RATED VALUE The performance levels indicated in the technical data are obtained with At 5 C To obtain the correction factors for a cooling capacity and input power differ ent from At 5 C use table 9 31 9 4
20. FOULING FACTORS The performance levels indicated in the technical data refer to conditions with clean tubes with a fouling factor 1 For other fouling factor values multiply the data of performance table 9 41 by the coefficients given CORRECTION COEFFICIENTS OF THE HEATING CAPACITY 43 5 External air temperature C CORRECTION COEFFICIENTS OF THE INPUT POWER IN HEATING MODE o u o E o G o E o External air temperature C 9 31 At different from the rated value 3 5 8 10 Cooling capacity correction factors 0 99 1 1 02 1 03 Cooling capacity correction factors 0 99 1 1 01 1 02 9 41 Fouling factors Ik m i iwl 0 00005 0 0001 0 0002 Cooling capacity correction factors 1 0 98 0 94 Cooling capacity correction factors 1 0 98 0 95 19 20 The cooling capacity and input power correction factors make allowance for the presence of glycol and the dif ferent evaporation temperature The pressure drop correction fac tor already takes account of the dif ferent flow rate deriving from the application of the water flow rate correction factor The correction factor of the wa ter flow rate is calculated so as to maintain the same At that would be used in the absence of glycols NB To make it easier to read the following graph an example is given By using the diagram below it possible to establish the perce
21. and heat pumps thus meeting the essential requisites of the following directives LV Directive 2006 95 EC Electromagnetic Compatibility Directive 2004 108 EC Machine Directive 2006 42 EC PED Directive relating to pressure equipment 97 23 EC In compliance with Directive 97 23 EC the product meets the Full quality assurance procedure module H with certificate no 06 270 QT3664 Rev 3 issued by the notified body no 1131 CEC via Pisacane 46 Legnano MI Italy Bevilacqua 28 12 2009 Marketing Director Signature qa 1 WARNINGS ON THE DOCUMENTATION 11 INTENDED USE AERMEC devices are built according to the recognised technical standards and safety regulations These units have been designed and built for heat ing and cooling and the production of hot domestic water they must be used for these purposes in accordance with their performance characteristics There may still arise risks for the safety of the user or third parties or even damage to the units and other objects in case of improper use Any use not specifically indicated in this manual is forbidden and AERMEC cannot therefore be held responsible for any Remember that the use of products employing electricity and water re quires the observance of some es sential safety rules The use of this unit is not intended for people including children with any physical or mental disability or any sensory impairment nor for people lacking
22. dedicated software in the regula tion card manages the heater Refrigerating circuit safety valve This intervenes by releasing overpressure in the event of abnormal working pressure levels Calibrated at 45 bar on the HP branch Calibrated at 30 bar on the BP branch only for heat pumps 5 9 ELECTRICAL COMPONENTS Electrical panel Contains the power section and the manage ment of the controls and safety devices In accordance with standards CEI EN 61000 6 1 CEI EN 61000 6 3 immunity and electromag netic emissions for the residential sector CEI EN 61000 6 2 CEI EN 61000 6 4 immunity and electromag netic emissions for the industrial sector and Directives EMC 89 336 EEC and 92 31 EEC concerning electromagnetic compatibility Low Voltage Directive LVD 2006 95 EC Door block disconnecting switch IT is possible to access the electrical panel by disconnecting the voltage then using the opening lever of the panel itself This lever can be blocked with one or more padlocks during maintenance in order to prevent the machine being powered up accidentally Control keypad Provides full control functions For a detailed description of the keypad refer to the user manual Remote control panel This allows the chiller command operations to be given from a distance compressor protection thermomagnetic switch fan protection thermomagnetic switch auxiliary protection thermomagnetic switch discharge gas temperatu
23. experience and knowledge unless they are supervised or in structed on the use of the unit by a person responsible for their safety Children should be supervised in or der to make sure that they do not play with the unit damage whatsoever resulting from the failure to observe these instructions 1 2 CONSERVING THE DOCU MENTATION Deliver the following installation instruc tions with all the complementary docu mentation to the user of the unit who shall be responsible for keeping the in structions so that they are always avail able when needed READ THIS DOCUMENT CAREFULLY The unit must be installed by quali fied skilled personnel in compliance with the national legislation in force in the country of destination M D 329 2004 The unit must be installed in such a way as to make all maintenance and or re pair operations possible The warranty of the device does not in any case cover costs incurred as a result of motorised ladders scaffolding or any other lifting systems made necessary to carry out the operations under warranty The warranty shall not be valid if the indications mentioned above are not observed 2 ESSENTIAL SAFETY RULES It is forbidden to carry out any tech nical or maintenance operation be fore disconnecting the unit from the mains by positioning the system and control panel main switches at off Itis forbidden to modify safety or reg ulation devices without the manufac
24. nor ar M23 Eque enya L ie ror ie 5 1 SW1 i DIP SWITCH C Mo CD ues EON E i Analogue inputs swe I ror pS ome _r RG i LLL E IL o TE _r e 1 hela EE Pl mar DCP analogue outputs lt lt M4 LL ELLE K E _r Fo me OE E ME i not used M5 M20 i i Oi M19 24V ca power supply M6 DI Remote panel M7 M18 24V ca power supply ___ RO 6 i M8 Digital inputs M9 e M17 Alarms summary E clean contact M10 x M16 M15 ee t 230V digital outputs M11 Digital inputs M14 M12 230V power supplv Missas Digital outputs C ESP1 O 1 vat 1 N 1 1 1 N N 1 H 230 1 1 60 1 VB2 N i N Vay i 1 Digital outputs ve VA2 i i N Ve i ti 40 vsL2 1 Digital outputs 1 1 LI 230 i N N i 1 RS 1 i VAI 1 1 Ni 1 VB1 q VSLI H 1 oS 48 24 5 CONNECTION TO THE ELECTRICAL POWER SUPPLY Check there is no voltage on the elec tric line you want to use To access the electric box 1 Make a turn of the screw anticlockwise 2 Turn the handle of the door block dis connecting switch to OFF then lock it and affix the warning notice The figures below show the various par
25. op erate in closed circuit so that there is no gas leak in the environment The glycol must not be thrown away in such a manner that affects the envi ronment when it is removed It must be placed in suitable containers 26 MAINTENANCE properly and facilitate troubleshooting In the booklet write down date type of operation carried out routine mainte nance inspection or repair descrip tion of the operation measures taken e Annual checks Chiller circuit Check the chiller circuit seal and make sure that the pipes in it have not suffered damage Perform the acidity test on the oil of the chiller circuit Check the functioning of the high and low pressure switches in the event of poor functioning replace them Check for any scaling on the filter drier and replace it if necessary 27 DISPOSAL NB The disposal of refrigerant gas any glycol water and any other material or substance must be carried out by qualified personnel and in compliance with the legislation in force in order to avoid damage to things or people or pollution of the surrounding area When the unit is pending disposal it can also be stored in the open as expo sure to the elements and temperature changes do not cause harmful effects for the environment as long as the unit electrical cooling and hydraulic circuits are closed and in good conditions e Electrical checks Check the conditions of the electri
26. serre fluor s relevant du protocole de Kyoto R410A Potentiel de r chauffement plan taire 1980 IT Contiene gas fluorurati ad effetto serra disciplinati dal protocollo di Kyoto R410A Potenziale di riscaldamento globale 1980 PT Cont m gases fluorados com efeito de estufa abrangidos pelo Protocolo de Quioto R410A Potencial de aquecimento global 1980 GR Nept xet Boplovxa a pia Beppoknriou KAXUNTOJIEVA ATO TO MPWTOKOAAO rou Koro R410A AuvapiK O ppavonc tou mAavm 1980 PL Zawiera fluorowane gazy cieplarniane objete Protokolem z Kioto R410A Wsp tczynnik ocieplenia globalnego 1980 SE Inneh ller s dana fluorerade v xthusgaser som omfattas av Kyotoprotokollet R410A Faktor f r global uppv rmningspotential 1980 53 AERMEC S p A 37040 Bevilacqua VH Italy Via Roma 996 Tel 39 0442 633111 Telefax 0442 93730 39 0442 93566 air conditioning www aermec com info aermec com The technical data in the following documentation are not binding Aermec reserves the right to make all the modifications considered necessary for improving the product at any time carta reciclata recycled paper papier recycl recycled papier QY AS CE AERMEC COMPANY QUALITY SYSTEM y Ge da b aw ISO 9001 2000 Cert n 0128 5 sale AERMEC SPA
27. sound power value on the basis of measurements taken in accordance with standard 9614 2 in compliance with the Eurovent certification 2 SOUND PRESSURE Sound pressure in an unrestricted range on a reflec tive plane directional fact Q 2 10m away from the unit external surface complying with ISO 3744 3690 3810 The devices in their standard configura tions are not suitable for installation in salty environments The maximum and minimum limits for the water flow rate to the exchanger are indicated by the curves of the pressure drop diagrams For the operating limits refer to the diagrams below valid for At 5 C NB The unit can be activated with external air at 46 C and inlet water at 35 C in the summer function The unit can be activated with external air at 15 C and inlet water at 20 C in the winter function Under these conditions the unit func tion is possible only for a short time in order to bring the system up to right temperature To reduce the time of this operation a three way valve allowing to by pass the water from the supply to the system should be fitted until the conditions enabling the unit to operate within the permitted operating limits are reached KEY Z Operation with glycol Operation with glycol with DCPX accessory Standard operation 77 eo 77 4 Standard operation with 020 DCPX accessory co OPERATING LIMITS 841 Outside air temperatur
28. the graph reaches outside air temperatures of 40 C it is necessary to maintain the machine s operating limits as reference axis and once you have intersected the curve trace a vertical line which in turn will intercept all the other curves the points obtained from the upper curves represent the coefficients for the cooling capacity and input power for the flow rates and the pressure drops remember that these coefficients must anyway be multiplied by the nominal value of the sizes examined the lower axis advises the percentage of glycol necessary to produce water at the required temperature Hemember that the initial sizes OUTSIDE AIR TEMPERATURE and PROCESSED WATER TEM PERATURE are not directly linked to each other so it is not possible to enter the curve of one of these sizes and obtain the corresponding point on the other curve 111 TOTAL PRESSURE DROPS Standard NAL cooling only unit A E 11 PRESSURE DROPS NB The pressure drops and useful heads are cal culated in cooling mode with water at 10 C TOTAL PRESSURE DROPS A E
29. the unit is kept under tension Air side heat exchanger High efficiency device made of copper pipes and aluminium blades locked into place via mechanical pipe expansion Water side heat exchanger Of the plate type AISI 316 externally insu lated with closed cell material to reduce ther mal dispersion Fitted as standard with anti freeze heater Liquid separator only for heat pump Located on the suction point of the compressor to protect against any flowback of liquid refriger ant flooded start ups operation in the presence of liquid Liquid accumulation only for heat pumps and total recovery To compensate the difference in volume be tween the finned coil and the plate heat ex changer holding back excess liquid Filter drier Of the mechanical type with cartridges made of ceramics and hygroscopic material able to trap impurities and any traces of humidity in the chiller circuit Sight glass For checking the refrigerating gas load and any humidity in the refrigerating circuit Thermostatic valve The mechanical type valve with outside equal iser on the evaporator outlet modulates the gas flow to the evaporator on the basis of the thermal load in such a way as to ensure the proper degree of overheating of the intake gas Electronic valve optional Liquid and discharge taps cooling only versions They allow the refrigerant to be cut off during extraordinary maintenance Solenoid valve The
30. turer s authorisation and indications It is forbidden to pull disconnect or twist the electrical cables of the unit even if it has been disconnected from the mains Itis forbidden to leave containers and flammable substances near the unit t is forbidden to touch the unit with wet parts of the body and bare feet It is forbidden to open the access doors to the unit internal parts with out having first turned off the system main switch It is forbidden to spread leave or keep the packaging material within the reach of children as it may be a possible source of danger 3 PRODUCT IDENTIFICATION NRL is identifiable by the packaging label the technical label located on the electronic box side sill NB showing the product identification data If the identification plate is tampered with or removed this prevents the certain identification of the product making all installation and maintenance operations more difficult PACKAGING LABEL TECHNICAL LABEL 41 The devices of the NRL range are units used to produce cold water for technological systems the heat pump models also allow you to produce hot water for heating They consist of two chiller circuits using R410A and a single hydraulic circuit which may or may not be fit ted with a water accumulator and or a pumping unit The presence of m
31. valve versions with water accumulator or pump Calibrated to 6 bar and with ductable dis charge it releases overpressure in the event of abnormal working pressure levels 58 SAFETY AND CONTROL COMPO NENTS Low pressure switch BP Cooling only A E Of fixed calibration located on the low pres sure side of the refrigerating circuit it stops the operation of the compressor in the event of anomalous work pressures High pressure switch AP Cooling only A E Heat pump HA HE With fixed calibration placed on the high pres sure side of the chiller circuit it shuts down compressor operation in the case of abnor mal operating pressure Low pressure transducers TP2 Cooling only A E accessory Heat pump HA HE standard Placed on the high pressure side of the chiller circuit it communicates to the control card the operating pressure sending a pre alarm in case of abnormal pressure High pressure transducer TP3 Cooling only A E standard Heat pump HA HE standard Placed on the high pressure side of the chiller circuit it communicates to the control card the operating pressure sending a pre alarm in case of abnormal pressure Anti freeze heater installed as standard Its operation is commanded by the anti freeze probe located in the plate evaporator lt is ac tivated when the water temperature is 3 C and deactivated when the water temperature is 5 C The
32. 00 1500 1650 1800 Heat capacity recovered kW 69 0 74 3 84 8 95 4 110 9 126 7 142 6 1551 167 7 Desuperheater water flow rate I h 11870 12790 14590 16400 19070 21800 24520 26680 28840 Desuperheater pressure drops kPa 21 9 0 9 6 12 5 15 5 16 5 22 5 24 3 30 9 DESUPERHEATER CORRECTION COEFFICIENTS 3 00 2 50 42 c g 2 00 5 Q o c 1 50 Q o 2 c 1 00 Q O 45 C 3 40 C 0 50 35 C 30 C 20 C 25 C 0 00 35 40 45 50 55 60 65 Processed water temperature at the desuperheater At 5 C DESUPERHEATER PRESSURE DROPS 100 1500 1800 90 80 SA 1400 1650 70 Q A 60 Q ol 9 50 o g 40 D QD 30 900 1000 o ce a 20 10 0 0 10 000 20 000 30 000 40 000 50 000 60 000 Water flow rate I h 15 1 2 Average water temperature 30 40 50 60 70 Multiplicational coefficient 1 04 1 02 1 0 98 0 96 Sound power Aermec determines the sound power value on the basis of measurements taken in accordance with standard 9614 2 in compliance with the Eurov ent certification Sound pressure Sound pressure in free field on a re flecting plane directional factor Q 2 in accordance with standard ISO 3744 NB The data refer to the version with standard fans 76 SOUND DATA Total sound levels Octave band Hz 250 500 1000 2000 4000 Pressure 125 Pow ES NRL 0750 A Sound power by central band frequency d NRL 0750 E NR
33. 0V 3N 50Hz with thermomagnetic switches 1 230V 3 50Hz with thermomagnetic switches e 500V 3 50Hz with thermomagnetic switches 15 16 Accumulation 00 Without hydronic water accumulator 01 Low head water accumulator and single pump 02 Low head water accumulator and reserve pump 03 High head water accumulator and single pump 04 High head water accumulator and reserve pump 05 Water accumulator with holes for supplementary electric heater low head and single pump 06 Water accumulator with holes for supplementary electric heater low head and reserve pump 07 Water accumulator with holes for supplementary electric heater high head and single pump 08 Water accumulator with holes for supplementary electric heater high head and reserve pump 09 Double hydraulic ring 10 Double hydraulic ring with supplementary electric heater P1 Without water accumulator with low head pump Pe Without water accumulator with low head pump and reserve pump P3 Without water accumulator with high head pump P4 Without water accumulator with high head pump and reserve pump WARNING With size 075 it is not possible to configure a 230V or 500V power supply With sizes 080 090 100 125 140 150 165 180 it is not possible to configure a 230V power supply NB For the heat pump versions M fans are not available only and J 5 1 5 DESCRIPTION OF COMPONENTS NRL 0750 1250 HIGH EFFICIENCY NB The drawings shown here only represent an example of the mac
34. 8 2 91 9 2 9 3 9 4 01 Warnings on the documentation Intended use Conserving the documentation Essential safety rules 3 Product identifiGablali idas eta 3 Description of the unit Available models Available versions Configurator Description of components Nrl 0750 1250 high efficiency Nrl 1400 1800 high efficiency Chiller circuits hydraulic A E Chiller circuits hydraulic HA HE Chiller circuit Frame and fans Hydraulic components e Safety and control components 10 Electrical components ACCeSSOFPIBS sodas nta nei ad fio dic alia dia 11 Technical data 3 Technical data versions A E 13 Technical data versions HA HE 15 Operating limits 7 Cooling mode Heating mode Correction factors Cooling capacity and input power Heating capacity and input power For At different from the rated value Fouling factors Ethylene glycol solution How to read the glycol curves Pressure drops Total pressure drops Useful aea cm P 22 Accumulation Maximum minimum water content in the system Minimum water content recommended Capacity CONTO qud de sia 25 Desuperheater Pressure drops Sound BO eese ve a dvd RUND EQUI RR Va asian 27 21 22 221 22 2 22 3 23 231 232 233 934 24 241 24 2 24 3 24
35. 85 and MODBUS type protocol Sprung anti vibration supports Select the model using the compatibility table Sprung anti vibration supports Select the model using the compatibility table Sprung 10 x3 Protect the external coils from accidental knocks 10 x3 0750 0800 0900 1000 1250 1400 1500 1650 1800 Card to be inserted in the electronic card of the unit Allows you to programme two time bands per day two switch on off cycles and to have differentiated programming for each day of the week AERWEBSO the AERWEB device allows the remote control of a chiller from a common PC using a serial connection Using additional modules the device allows the chiller to be controlled via the telephone line using the AERMODEM acces sory or via the GSM network using the AERMODEM GSM accessory AERWEB can pilot up to 9 chillers but each of these must be equipped with accessory AER485 or AER485P2 It makes it possible to show the value of the compressor s intake pressure one per circuit on the microprocessor card display Placed on the low pressure side of the refrigerating circuit it shuts down compressor operation in the case of abnormal operating pressure xe standard Current rephaser Parallel connection with the motor makes the reduction of input current possible It can only be installed
36. 94 107 122 140 158 168 182 HA 30270 36290 41110 44890 54180 60370 66740 75160 81180 Water flow rate as HE 28380 33370 36640 39730 48850 54870 61060 68460 73270 Total pressure drops kPa FIR 74 55 56 53 61 48 49 54 53 P P HE 65 47 45 43 51 40 41 45 44 HEATING Heating capacitv kW 201 233 263 293 344 388 433 484 523 HA kw HE 65 2 74 83 93 110 124 139 153 163 HA Total input power 34570 40080 45240 50400 58170 68740 74480 83250 89960 Water flow rate Total pressure drops 96 68 69 69 76 58 60 66 66 l h HE HA KP HE ENERGY INDICES ELECTRICAL DATA HA 400V Fuel feed A 3N 50Hz 400V 3 50Hz HE HA Input current A HE 113 138 157 177 197 231 265 282 293 HA Maximum current A HE 144 177 199 221 274 303 332 373 406 HA Peak current A HE 320 352 408 430 542 512 541 641 674 COMPRESSORS SCROLL Number Circuit FANS AXIAL Quantity i 6 6 6 8 8 126000 124200 122400 168000 165600 88200 90000 91800 117600 115920 Air flow rate Input power i 5 10 2 10 2 10 2 13 6 13 6 Input current j y 21 6 21 6 21 6 28 8 28 8 EVAPORATORS PLATES HA HE HA Plumbing connections IN CUT HE HYDRAULIC CIRCUIT Guantity no Accumulation capacity Accumulation anti freeze heater Plumbing connections IN OUT hydronic pum
37. CKS TO RE DUCE ANY RISK TO A MINIMUM All the personnel in charge must know the operations and possible risks that may arise when all the unit in stallation operations begin Danger The refrigerant circuit is under steam High temperatures are also possible The unit may only be opened by a SAT service technician or by an authorised and quali fied technician The operations in the cool ing circuit can only be performed by a qualified refrigeration technician GAS R410A The unit is delivered with the necessary amount of refrigerant R410A for its operation It is a refrigerant without chlorine that is not harmful for the ozone layer R410A is not flammable However all maintenance operations must only be carried out by a specialised technician with the suitable protection equipment Risk of electric discharge Before opening the unit it is necessary to disconnect the device completely from the mains 221 HANDLING Before installing the unit decide with the customer the position in which it will be placed pay attention to the fol lowing points The support surface must be able to withstand the weight of the unit The selected place must be large enough for laying the necessary pipes Take into account that when the chiller is working vibrations may be generated it is therefore advisable to install anti vi bration supports VT AVX accessories fitting them to the holes in the b
38. ION PUMP ONLY The drawings are only approximate and merely represent the components in the various versions 43 44 23 3 INTERNAL HYDRAULIC CIRCUIT NRL 01 02 03 04 05 06 07 08 Key 1 Pump unit 5 Expansion tanks 2 Water filter 6 Heat exchanger 3 Accumulation 7 Flow switch 4 Drain valve 8 Safety valve 23 4 09 10 INTERNAL HYDRAULIC CIRCUIT NRL The drawings are only approximate and merely represent the compo nents in the various versions WATER DISCHARGE HYDRAULIC CIRCUIT VERSION WITH WATER STORAGE 34 NB The drawings are only approximate and merely represent the components in the various versions Key 1 Expansion vessel 6 Filter 2 Shut off valve 7 Flow switch 3 Vent valve 8 Pump 4 Safety valve 6 bar 9 Storage tank draining 5 Probe 10 Plate heat exchanger NB The presence of the filter should be considered obligatory and ITS REMOV AL WILL MAKE THE GUARANTEE void It must be kept clean so it is necessary to check its clean state after the instal lation of the unit and check it regularly The installation of the shutoff valves is recommended to be able to discon nect the machine from the system or for maintenance operations EXTERNAL HYDRAULIC CIRCUIT RECOMMENDED The choic
39. IRCULATION Pl Input power Input current Useful head m3 h kW A mi gt 49000 72800 71500 70200 106200 104100 102000 125800 122000 m mi gt m 35300 3 75 8 4 50960 al o 51805 e o 52650 c o 74340 75 75420 75 76500 75 91110 10 0 21 6 91500 10 0 21 6 The plumbing connections are all of the Victaulic type 13 A AE ESE EEE TR EEE Input power Input current 11 0 9 7 141 Useful head Sound power 1 Sound pressure 2 Height Pm i Width Depth m Weight when empty m NOMINAL REFERENCE CONDITIONS COOLING MODE 1 SOUND POWER 2 SOUND PRESSURE Inlet water temperature 12 C Aermec determines the sound power value on the Sound pressure in an unrestricted range on a reflec Dutlet water temperature 7 C basis of measurements taken in accordance with tive plane directional fact Q 2 10m away from the Dutside air temperature 35 C standard 9614 2 in compliance with the Eurovent unit external surface complying with ISO 3744 At 5 C certification 7 2 TECHNICAL DATA VERSIONS HA HE COOLING 0750 osoo 0900 1000 1250 1400 1500 1650 1800 HE 165 194 213 231 284 319 355 398 426 HE 77 81
40. ITION OF VIBRATION DAMPERS 1500 1150 1500 o Te 1492 1392 50 HOLE FOR POWER SUPPLY 1705 1975 PLUMBING CONNECTIONS VERSION OO AND PUMPS 100 lt lt d PLUMBING CONNECTIONS WITH ACCUMULATION 100 2650 1500 100 f lt o T o A o o o 100 2650 1500 100 30 19 2 NRL 800 900 1000 HIGH EFFICIENCY POSITION OF VIBRATION DAMPERS o O e 100 1400 2000 1400 VERSION 00 100 D HOLE FOR POWER SUPPLY
41. L 0750 HE NRL 0750 HA NRL 0800 A NRL 0800 E NRL 0800 HA NRL 0800 HE NRL 0900 A NRL 0800 E NRL 0900 HA NRL 0900 HE NRL 1000 A NRL 1000 E NRL 1000 HA NRL 1000 HE NRL 1250 A NRL 1250 E NRL 1250 HA NRL 1250 HE NRL 1400 A NRL 1400 E NRL 1400 HA NRL 1400 HE NRL 1500 A NRL 1500 E NRL 1500 HA NRL 1500 HE NRL 1650 A NRL 1650 E NRL 1650 HA NRL 1650 HE NRL 1800 A NRL 1800 E NRL 1800 HA NRL 1800 HE The values refer to 1 12 C water inlet temperature 7 C processed water temperature outside air temperature 27 17 SAFETY AND CHECK PARAMETER SETTING CHECK PARAMETERS Cold Setting heating Setting Anti freeze intervention Total differential Water inlet temperature in cooling mode Water inlet temperature in heat mode Anti freeze alarm intervention temperature on EV side water output temperature Proportional temperature band within which the compressors are activated and deactivated MIN MAX DEFAULT MIN MAX DEFAULT MIN MAX DEFAULT MIN MAX DEFAULT Autostart auto NRL 0750 0800 0900 1000 1250 1400 1500 1650 1800 COMPRESSOR THERMOMAGNETIC SWITCHES 400V 29A 40A 40A 51A 62A 51A 62A 29A 40A 40A 51A 62A 51A 62A 51A
42. ainer could explode Use vapourised water to keep the fire exposed containers cool This product is not inflammable at room temperature and atmospheric pressure It could become inflammable however if mixed with pressurised air and exposed to strong ignition sources MEASURES TO BE ADOPTED IN THE EVENT OF ACCIDENTAL LEAKAGE Environmental precautions Stop the leak if there is no risk involved Any leaks will quickly evaporate Cleaning methods The mixture evaporates STORAGE AND HANDLING Open carefully to allow any internal pressure to be released gradually Store and use away from heat sparks naked flames or other combustion sources Pressurised Handling container Protect from direct sunlight and do not expose to temperatures above 50 C Do not pierce or burn even after use Ensure adequate ventilation Wash your hands well after touching the product Warnings for safe use Ensure there is a good air flow and or aspiration in the working environment For saving maintenance dismantling and disposal use an autonomous breathing apparatus The vapours are heavier than the air and can provoke suffocation reducing the oxygen available for breathing Protect your hands with heatproof gloves Protect your eyes with safety goggles When handling observe the good practices of industrial hygiene and safety ECOLOGICAL INFORMATION Substance FORANE 32 Not easily biodegradable
43. are working by measuring the rise in the tempera ture in the oil sump The heater s must work for at least 24 hours before the compressor start up and in any case the temperature of the oil sump must be 10 15 C higher than the room tem perature WARNING At least 24 hours before starting up the unit or at the end of each period of prolonged inactivitv the unit must be powered up to allow the heaters of the compressor carter to evaporate any refrigerant that may be present in the oil If this precaution is not performed the compressor could be seriously damaged and the guarantee would no longer be valid 25 1 2 Hydraulic circuit controls Check that all the hydraulic connec tions are correctly made and that the indications on the plates are observed Check that the hydraulic system is full and under pressure and check also that there is no air if there is air bleed it 25 START UP Check that any interception valves on the system are correctly opened Check that the circulation pump s are working and that the water flow rate is sufficient to close the flow switch contact Check the correct working of the flow Switch closing the shutoff valve at the heat exchanger outlet the lockout alarm must appear on the display Final ly reopen the valve and rest the lockout 25 2 START UP WARNING Bear in mind that a free start up service is offered by the AERMEC After Sales Service for the uni
44. ase ac cording to the assembly diagram It is compulsory to provide the nec 22 3 HANDLING EXAMPLE ee RECEIVING THE PRODUCT essary technical clearances to allow ROUTINE AND EXTRAORDINARY MAINTENANCE INTERVENTIONS 22 2 POSITIONING Before moving the unit check the lifting capacity of the machines used Once the packaging has been removed the unit must be handled by qualified personnel using the appropriate equipment To handle the machine IN THE EVENT OF LIFTING hook the lifting cables to the special eyebolts as indicated in the figure In order to avoid damaging the unit with the cables insert protection elements between them and the machine Is it absolutely forbidden to stand beneath the unit NB The warranty of the device does not in any case cover costs owing to ladder trucks lifts or other lifting systems that may be required in order to carry out the interventions under guarantee 231 HYDRAULIC CIRCUIT INTERNAL NRL OO Key 1 Heat exchanger 2 Water filter e3 HYDRAULIC CIRCUITS WATER DISCHARGE HYDRAULIC CIRCUIT 750 ONLY 23 2 INTERNAL HYDRAULIC CIR CUIT NRL P1 P2 P3 P4 Key Expansion tanks Plate heat exchanger Drain valve Pump unit Water filter DJO A 0 MM gt Flow switch WATER DISCHARGE HYDRAULIC CIRCUIT VERS
45. breathe in fresh air If the person has trouble breathing give him oxygen If breathing has stopped practise artificial respiration Contact a doctor Contact with the skin if the skin comes into contact with the quickly evaporating liquid this may cause the tissues to freeze In the event of contact with the liquid heat the frozen tissues with water and call a doctor Remove contaminated clothes and footwear Wash the clothes before using them again Contact with the eyes Rinse the eyes immediately with running water for at least 15 minutes keeping the eyelids open If the irritation persists contact a doctor Note for the doctor Do not give adrenaline or similar substances 51 Toxicological information Inhalation irregular heartbeat arrhvthmia Ingestion no specific risk Contact with the skin if the skin comes into contact with the quickly evaporating liquid this may cause the tissues to freeze Slightly irritating for the skin Contact with the eyes slightly irritating for the eyes FIRE FIGHTING MEASURES Extinction means Not inflammable ASTM D 56 82 ASTM E 681 In the event of a fire use vapourised water foam dry chemical products or CO2 Particular risks from exposure Possibility of dangerous reactions being generated during a fire due to the presence of F and or Cl groups In the event of a fire or overheating there is an increase in pressure and the cont
46. e and installation of compo nents aside of the NRL is the responsi bility of the installer who must 241 FILTER CLEANING PROCE DURE type of filter only assembled in the version with water accumula tor and pump Stop the machine Turn on the filter discharge tap Loosen the hexagonal nut on the filter head remove the metal ring nut and clean it Replace the ring nut in the filter housing and retighten the hexago nal nut use good working practices and ob serve the standards in force in the des tination country M D 329 2004 You are advised to install the charging unit air vent antivibration joints a8 pump if it is not supplied with the machine an expansion tank if it is not sup plied with the machine shutoff taps a flow switch a safety valve if it is not supplied with the machine pressure gauges Drain tap chiller in the tube outgoing evaporator for standard ver sions except size 750 NB The hydraulic piping for connection to the machine must be properly scaled for the actual water flow rate re quired by the plant when working The water flow rate to the heat exchanger must always be constant 24 FILTER MAINTENANCE Key Drain valve Hexagonal nut Filter discharge tap SO mij Metal ring nut housing 45 46 All electrical operations must be carried out
47. e d b C 15 COOLING MODE 5 o 5 10 Processed water temperature C 15 18 8 2 HEATING MODE Processed water temperature C Outside air temperature d b C For buffer tanks 09 10 double water ring the temperature of the plant is the temperature produced by the unit 3 C higher in cooling mode 3 C lower in heating mode 17 18 91 COOLING CAPACITY AND INPUT POWER HIGH EFFICIENCY VERSIONS The refrigerating capacity yielded and the input electrical capacity in condi tions other than rated conditions are obtained by multiplying the rated values Pf Pa by the respective correction co efficients Cf Ca The following diagrams allow you to ob tain the correction coefficients to be used for the various versions of the de vices in cold mode next to each curve you can see the outside air tempera ture to which it refers KEY Cf correction coefficient of the cooling capacity Ca correction coefficient of the input power FOR At DIFFERENT FROM 5 C For the evaporator refer to Tab 9 31 to obtain the cooling capacity and input power correction factors To take into account the exchanger soiling apply the relative fouling factors Tab 9 4 1 9 CORRECTION FACTORS CORRECTION COEFFICIENTS OF THE COOLING CAPACITY Cf 1 6 0 9 0 8 0 7 0 6 0 5 0 4 20 C 25 C 30 C 35 C 40
48. hine KEY 1 Plate heat exchanger 11 Compressors 2 Accumulation 12 Accumulation discharge 3 Expansion tank 13 Desuperheater 4 Pumps 14 Filter assembled 5 Charging unit 15 Reverse cycle valve 6 Safety valve 16 Liquid accumulation 7 Drain valve 17 Thermostatic valves 8 Battery 18 Filter drier 9 Fans 19 Liquid separator 1O Electrical panel 20 Electric heater NRL 1400 1800 HIGH EFFICIENCY 5 2 NB The drawings shown here only represent an example of the machine KEY o D a tion discharge mul 2 2 olojo 5 2 gt 3 a j nol 12 Acc 2 Accumulation 4 Pumps 6 Safety valve 8 Battery 10 Electrical panel 5 3 CHILLER CIRCUITS HYDRAULIC A E VSIC 4 amp 1 RU IX RU X loading AP pp D TGP O NOTES In all sizes except for 750 size se lected with the additional heater the water flow goes in the opposite direction compared to the standard version Consequently the tank is positioned underneath the heat exchanger SK 5 a ET X y di 5 x Y additional heater thermostatic valve Rind T BVT Temperature valve bulb RU Tap em BP Low pressure switch SIW Water inlet temperature sensor SC Heat exchanger AP High pressure
49. lastic caps with the special TRX1 FACTORY ASSEMBLED ACCESSORY Pressure switch with manual reset using a tool elec the high pressure switch on the compressor delivery pipe FACTORY ASSEMBLED ACCESSORY Pressure switch with manual r the high pressure switch on the compressor delivery pipe 7 TECHNICAL DATA 71 TECHNICAL DATA VERSIONS L A E cooing amp 750 800 900 1000 1250 1400 1500 1650 1800 Cooling capacity Total input power Water flow rate Total pressure drops kw kW 195 218 242 271 322 357 399 437 469 mi gt 180 62 203 69 224 81 250 93 298 106 329 124 367 142 409 154 436 167 m 68 76 88 101 115 134 154 165 179 p m gt m ENERGY INDICES ELECTRICAL DATA Fuel feed Input current Maximum current Peak current mi gt 400V 3 50Hz 196 235 m m m 211 267 535 251 296 905 COMPRESSORS SCROLL no no A 4 2 4 2 4 2 4 2 4 2 5 2 6 2 6 2 6 2 Number Circuit FANS AXIAL Quantity no 3 4 4 4 6 6 6 8 8 Air flow rate Input power Input current ENLARGED FANS AXIAL Quantit Input power Input current Useful head EVAPORATORS PLATES Plumbing connections IN OUT Expansion tank LOW HEAD C
50. machine in operation is pre vented by the door lock sectioning device Do not rest tools or heavy objects di rectly on the side heat exchanger coils so as not to ruin the fins NB Do not introduce objects or allow them to fall through the grilles of the fan motors Do not rest cutting surfaces against the thermal exchange coils 28 IMPROPER USE 281 IMPORTANT SAFETY INFOR MATION The machine must not exceed the pres sure and temperature limits indicated in the table given in the Operating limits paragraph of the technical manual Correct functioning is not guaranteed after a fire before starting up the ma chine again contact an authorised As sistance Centre The machine is equipped with safety valves which in the event of excessive pressure can discharge the high tem perature gases into the atmosphere Wind earthquakes and other natural phenomena of exceptional intensity have not been taken into account If the unit is used in an aggressive at mosphere or with aggressive water consult the company head office WARNING Following extraordinary maintenance interventions on the refrigerating circuit with the replacement of components before restarting the machine it is neces sary to carry out the following operations Pay the closest attention when restoring the refrigerant load indi cated on the machine s rating plate inside the electrical panel Open all the taps in the chiller circuit
51. me the pressure drops in the system There is also the possibility to have a reserve pump The reserve pump is managed by the electronic card Flow switch assembled in versions with wa ter accumulator or pump Water filter assembled in the version with water accumulator or pump supplied with the other versions Allows you to block and eliminate any impuri ties in the hydraulic circuits Inside it has a filtering mesh with holes not greater than one millimetre lt is essential in order to avoid seri ous damage to the plate heat exchanger Accumulation tank In stainless steel with a 700 litre capacity In order to reduce the thermal dispersion and eliminate the phenomenon of the formation of condensation it is insulated with polyurethane material of a suitable thickness Two antifreeze electric heaters of 300W down to 20 C outside temperature and tank water temperature 5 C assembled as stand ard and commanded from the card via an anti freeze sensor inserted in the tank Drain valve versions with water accumulator or pump Of the automatic type assembled on the upper part of the hydraulic system it releases any air bubbles that may be present in the system Charging unit versions with water accumulator or pump This has a pressure gauge showing the pres sure in the system Expansion tank versions with water accumulator or pump Ofthe membrane type with nitrogen pre charge Hydraulic circuit safety
52. ntage of glycol necessary this percentage can be cal culated taking into account one of the following factors On the basis of the fluid considered wa ter or air it will be necessary to enter the graph from the right or left side from the intersection of the outside air temperature or processed water tem perature straight lines and the relative Curves a point is obtained through which the vertical line that will identify both the percentage of glycol and the relative cor rection coefficients will have to pass 104 HOW TO READ THE GLYCOL CURVES The curves shown in the figure sum marise a notable quantity of data each of which is represented by a specific curve In order to use these curves correctly it is necessary to make some initial considerations f you want to calculate the per centage of glycol on the basis of the outside air temperature you must enter from the left hand axis and once you have intersected the curve trace a vertical line which in turn will intercept all the other curves the points obtained from the upper curves represent the co efficients for the correction of the cooling capacity and input powen for the flow rates and the pressure drops remember that these coef ficients must anyway be multiplied by the nominal value of the sizes examined the lower axis advises the percentage of glycol necessary on the basis of the outside air tem perature considered If you want t
53. o calculate the percent age of glycol on the basis of the tem perature of the processed water you must enter from the right hand 70 ETHYLENE GLYCOL SOLUTION 2 20 FcGDpF a 210 FCGDpF b 2 00 FcGDpF c 90 86 FCGDpF d 70 0 FcGDpF e 50 M 30 DO FcGGF 20 Nam FcGG PdC 110 00 TES FcGPf PdC 0 99 0 990 0 98 TA FcGPa 0 97 0 96 0 95 EP FcGPf 5 Li 5 o E a o 6 o 10 E E i 2 B 2 B 2 3 Y B E G o L m L E B 15 20 30 35 40 45 50 55 m x Glycol f B 0 o el i 9 KEY FcGPf Correction factor of the cooling capacity FcGPa Correction factor of the input power FcGDpF a Correction factor of the pressure drops evaporator average temp 3 5 C FcGDpF b Correction factor of the pressure drops average temp 0 5 C FcGDpF c Correction factor of the pressure drops average temp 5 5 C FcGDpF d Correction factor of the pressure drops average temp 9 5 C FcGDpF e Correction factor of the pressure drops average temp 47 5 C FcGGF Correction factor of the outputs evaporator average temp 9 5 C FcGQC Correction factor of the outputs condenser average temp 475 C NB Although
54. ore than one scroll type compres sor allows the NRL chillers various capacity controls of the cooling capacity By means of a microproc esson the electronic regulation controls and manages all the com ponents and working parameters of the unit an internal memory reg isters the working conditions in the moment when an alarm condition arises in order to visualise it on the display The units have a protection class of IP 24 AVAILABLE MODELS COOLING ONLY A E maximum outside temperature al lowed 46 C processed water temperature 18 C HEAT PUMP HA HE in cooling mode the operating limits arrive at a maximum external air tem perature of 46 C processed wa ter temperature 18 C in heating mode the operating limits arrive 4 DESCRIPTION OF THE UNIT at a maximum external air tem perature of 42 C processed water temperature 55 C NRLH do not offer the following configurations YH with processed water lower than 4 C HC condensing heat pump VERSIONS AVAILABLE HEAT RECOVERY UNITS with desuperheater inserted as standard D WARNING in the heat pump versions the des uperheater must be intercepted during heat pump operation other wise the guarantee will no longer be considered valid Total heat recovery T With plate heat exchanger inserted in parallel with the coils Both versions D T use 8 hot gas bypass device upstream from the evaporator Water filter before the reco
55. ping unit Expansion tank n 1 2 24 2 24 2 24 2 24 2 24 2 24 2 24 2 24 2 24 LOW HEAD CIRCULATION P UMP HA Input power KW HE 3 0 3 4 3 4 3 4 4 6 4 6 5 9 5 9 5 9 A H 6 2 5 8 5 8 5 8 7 8 78 Input current 10 0 10 0 10 0 HE HA 104 123 114 111 128 128 125 106 95 PEGLI head a HE 110 135 132 131 150 149 141 126 119 The plumbing connections are all of the Victaulic type 16 1 0750 osoo osoo 1000 1250 1400 1500 1650 1800 HA Input power KW HE 55 5 7 5 7 5 7 8 3 8 3 8 3 10 5 10 5 Input current 11 0 141 Useful head SOUND DATA Sound power 1 Sound pressure 2 Height eig E HA Width HE HA Depth gt HE HA Weight when empty HE NOMINAL REFERENCE CONDITIONS COOLING MODE Inlet water temperature 12 C Outlet water temperature 7 6 Outside air temperature 35 C At 5 C 1975 2450 2450 1500 2200 2200 4350 3400 3400 2150 2300 2450 2200 3400 2460 2450 2200 4250 2750 2450 2200 4250 2990 2450 2200 4250 3190 2450 2200 5750 3680 2450 2200 5750 3800 1487 2160 2310 HEATING MODE Inlet water temperature Outlet water temperature Dutside air temperature At 2470 40 C 45 C 7 6 C 5 C 2760 3000 3200 1 SOUND POWER Aermec determines the
56. r temperature 50 C exchangers are oversized in relation to the re K External air temperature 7 CDB 6 CWB spective refrigerant flow rates thereby allowing 25 26 The heating capacity that can be obtained from the desuperheater is obtained by mul tiplying the nominal value Pd shown in table 1511 by a suitable coefficient Cd The diagrams will give you the correction coef ficients to be used for the chillers in the vari ous versions next to each curve you can see the outside air temperature to which it refers In the heat pump versions the desuperheater 75 DESUPERHEATER 151 PRESSURE DROPS All sizes of the NRL models with desuperheat er have 2 desuperheaters arranged parallel to each other NB the characteristics of the desuperheaters and the pressure drop curves are shown below For processed water temperatures different from 50 C the result obtained is multiplied by the correction factor that can be obtained from Table 15 1 2 The nominal value refers to must be intercepted during heat pump opera air temperature 35 C tion otherwise the guarantee will no longer water at the desuperheater 45 50 C be considered valid At 5 C 1511 NRL D 750 800 900 1000 1250 14
57. re control thermostat ELECTRONIC REGULATION Microprocessor card Consisting of a management control card and a visualisation card Functions carried out adjustment of water temperature at evap orator inlet with thermostat control for up to 4 levels and integral proportional fan speed control with DCPX accessory compressor start up delay compressor sequence rotation count of compressor work hours start stop reset permanent alarms memory autostart after voltage drop mult lingual messages operation with local or remote control Machine status display ON OFF compressors alarms summary Alarm management high pressure flow switch 6 ACCESSORIES low pressure antifreeze compressor overload fan overload pump overload Display of the following parameters water inlet temperature accumulation temperature water outlet temperature delta T high pressure low pressure waiting time for restart alarms visualisation Settings a without password cooling set total differential with password anti freeze set low pressure exclusion time display language access code For further information refer to the user manual b 0750 0800 0900 1000 1250 1400 1500 1650 1800 AER485 Through this accessory it is possible to connect the unit with BMS supervision systems with electrical standard RS 4
58. s gives the superheating value Opti mum values are between 4 and 8 C 25 2 3 Under cooling Check the level of under cooling by com paring the temperature indicated with a contact thermostat placed on the tube at the condenser outlet and the temperature shown on the high pressure gauge satura tion temperature corresponding to the con densation pressure The difference between these two tem peratures gives the under cooling value Optimum values are between 4 and 5 C in cooling mode and between 1 C and 3 C in heat mode 25 2 4 Discharge temperature If the values of under cooling and overheat ing are regular the temperature measured in the discharge tube atthe compressor outlet must be 30 40 C higher than the condensation temperature 25 3 SYSTEM LOADING UNLOADING During the winter if the system remains idle the water in the heat exchanger may freeze causing irreparable damage to the heat exchanger itself the complete drain ing of the refrigerating circuits and some times damage to the compressors To avoid the risk of freezing there are three possible solutions the complete draining of the water from the heat exchanger at the end of the season and the refilling at the start of the next season by means of the drain valve located on the accumu lation tank in the versions with accumu lation and or pump Chapter 23 the operation with glycol water with a glycol percentage chosen on the ba
59. sis of the minimum outside temperature envisaged In this case it is necessary to take into consideration the different yields and absorption of the chiller the measurements of the pumps and the output of the terminals the use of heaters in the heat exchanger standard on all devices In this case the heaters must always be powered for the entire winter period machine in standby 49 50 NB All the routine and extraordinary maintenance operations must be car ried out only by qualified personnel Before starting any cleaning or main tenance operation it is advisable to disconnect the unit from the power supply All the units are subject to wear along time Maintenance operations allow you to uphold unit efficiency reduce the speed of wear collect information and data and understand the unit efficiency sta tus to prevent possible failures IT is therefore essential to carry out regular checks N ANNUALLY N SPECIAL CASES It is advisable to keep a machine booklet not supplied but provided by the user in order to keep trace of the operations carried out on the unit In this way it will be easier to organise the operations 271 DISCONNECTING THE UNIT The unit disconnection operations must be carried out by a registered technician Before disconnecting the unit the fol lowing elements must be removed if present The refrigerant gas the gas must be removed with suction devices that
60. switch GE Electrical panel AS Discharge tap __PP_ Pressure test point FL Flowswiteh P Accumulation return valve FM Waterfilter Equaliser 5 4 CHILLER CIRCUITS HYDRAULIC HA HE NOTES In all sizes except for 750 size se lected with the additional heater the water flow goes in the opposite direction compared to the standard version Consequently the tank is positioned underneath the heat exchanger VSA vel SF LI LO GB GR SA loading RE e e SD XRS RU IX O VNRISVNRI Battery Temperatur Liquid separator Filling discharge tap AN e valve bulb Low pressure switch Low pressure transducer i Equaliser Non return valve i Heat exchanger Water outlet temperature sensor QE Electrical panel VE Expansion tank iquid accumulator RE 800W electric heater SD pAntifreeze sensor RS Discharge tap Sla P Accumulation l Non return valve FMI Water filter FL Flow switch 10 5 5 CHILLER CIRCUIT Compressors High efficiency scrolltvpe hermetic compres sors assembled on elastic anti vibration sup ports driven by a 2 pole electric motor with internal thermal protection of the electric heat er casing included as standard The heater is automatically powered when the unit stops provided that
61. th glycol water The values are obtained by multiplying the reference value by the correction coefficient 131 2 Expansion tank calibration The standard pressure value for pre charging the expansion tank is 1 5 ban and the volume is 24 litres maximum value 6 bar The tank must be calibrated according to the maximum difference in height H of the device see figure according to the formula p calibration bar H m 10 2 0 3 For example if the level difference H is 20m the calibration value of the tank will be 2 3 bar If the calibration value obtained from the calculation is lower than 1 5 bar i e for H lt 12 25 maintain the standard calibration 13 4 MINIMUM WATER CONTENT RECOMMENDED Compres NRL eua 1 I KW 2 LKW Minimum water content 13 ACCUMULATION 13 2 Hvdraulic height Hm 30 25 20 15 212 25 Expansion tank calibration bar 3 2 2 8 2 3 18 15 Water content reference value 1 2174 2 646 3118 3590 3852 Water content reference value IE 978 1190 1404 1616 1732 Water content reference value 3 510 622 732 844 904 13 3 leoi Water Water temp C Correction Reference md mum coefficient condition 1096 40 2 0 507 1 10 60 2 0 686 2 10
62. ts of this series at the request of Aermec customers or legitimate owners VALID IN ITALY ONLY Placing machines in operation must be previ ously agreed on the basis of the system cre ation times Before the intervention of the AERMEC After Sales Service department all the works electrical and plumbing connec tions charging and bleeding of the air of the system must have been completed Before performing the checks indicated below make sure that the unit is discon nected from the mains using the suitable instruments 25 2 1 Chiller circuit checks Check for refrigerant gas leaks espe cially near the pressure test points pressure gauges pressure transduc ers and pressure switches vibration during transport may have loosened the connectors After a brief working period check the level of oil in the compressor and the absence of bubbles in the liquid indica tor glass A continuous passage of va pour bubbles in cooling mode may indi cate an insufficient refrigerant charge or that the thermostatic valve is incor rectly set The presence of vapour for brief periods is however possible 25 2 2 Overheating Check the level of overheating by compar ing the temperature indicated with a con tact thermostat placed on the compressor suction and the temperature shown on the low pressure gauge saturation tem perature corresponding to the evaporation pressure The difference between these two temper ature
63. ts to facilitate the various line connections L7 L2 L3 N Neutral Earth PE earth connection Hole for electric cables 254 PRELIMINARY OPERATIONS WARNING Before carrying out the controls indicat ed below ensure that the unit is discon nected from the mains supply Ensure that the main switch is turned to OFF and locked in position and attach a warn ing sign to the switch Before beginning the operations check the absence of voltage by means of a voltmeter or a phase detector 2511 Electrical checks Check the general power supply cables are of a suitable section able to with stand the overall absorption of the unit see electrical data and that the unit has been duly earthed Check all the electrical connections are correctly fixed and all the terminals adequately closed The following opera tions must be carried out when the unit is not powered up Power up the unit by turning the main switch to ON The display will come on a few seconds after the machine is powered up check that the operation status is at OFF OFF BY KEYB at the bottom of the display Using a testen check that the value of the supply voltage to the RST phases is equal to 400V 10 furthermore check that the imbalance between the phases is not more than 396 Check that the connections made by the installer comply with the data given here Check that the electric heater s of the compressor casing
64. ut power Levels of power Versions 1 2 3 4 5 6 NRL 750 23 47 73 100 3 NRL 800 23 47 73 100 gt NRL 900 23 47 73 100 3 NRL 1000 23 47 73 100 NRL 1250 23 47 73 100 S 2 NRL 1400 18 37 56 77 100 NRL 1500 14 29 46 63 81 100 NRL 1650 14 29 46 63 81 100 NRL 1800 14 29 46 63 81 100 Pk Heating Levels of power capacity Versions 1 2 3 4 5 6 NRL 750 27 52 77 100 NRL 800 27 52 77 100 NRL 900 27 52 77 100 NRL 1000 27 52 77 100 NRL 1250 27 52 77 100 NRL 1400 24 43 62 83 100 NRL 1500 18 36 53 69 85 100 NRL 1650 18 36 53 69 85 100 NRL 1800 18 36 53 69 85 100 gt Input power Levels of power Versions 1 2 3 4 5 6 NRL 750 23 47 73 100 NRL 800 23 47 73 100 NRL 900 23 47 73 100 NRL 1000 23 47 73 100 NRL 1250 23 47 73 100 NRL 1400 20 37 56 79 100 NRL 1500 14 29 46 63 81 100 NRL 1650 14 29 46 63 81 100 NRL 1800 14 29 46 63 81 100 KEY WARNING The performance levels refer to the following As can be seen from the table in choke mode the greater energy efficiency For this reason this conditions reduction of the input power is greater than the series of devices is especially suitable for reduc reduction of the output power hence obtaining an ing energy consumption with variable load typi 3 amp Processed water temperature 7 C EER greater than that in full load operation cal of the comfort applications 3 amp Outside air temperature 35 C This is because during capacity control the heat k Processed wate
65. valve closes when the compressor turns off preventing the flow of refrigerant gas to wards the evaporator Bypass solenoid valve only for heat pumps To bypass the thermostat controlled valve during the defrosting cycle Reverse cycle valve only for heat pumps Inverts the flow of refrigerant when operation is switched between summer winter and during defrosting cycles Non return valve Allows the refrigerant to flow in one direction only heat pump or total recovery Desuperheater only upon request Of the plate type AISI 316 externally insulat ed with closed cell material to reduce thermal dispersion Total recovery only upon request Of the plate type AISI 316 externally insulat ed with closed cell material to reduce thermal dispersion 5 6 FRAME AND FANS Fan unit Screw type statically and dynamically balanced The electric fans are protected electrically with thermomagnetic switches and mechanically with metal anti intrusion grilles in accordance with the standard CEI EN 60335 2 40 Enlarged fans M These offer a useful head to overcome the pres sure drops in the aeraulic system Inverter fans J Load bearing structure Made of hot galvanised steel sheet of a suitable thickness varnished with polyester powders able to resist atmospheric agents over time 54 HYDRAULIC COMPONENTS Circulation pump Depending on the characteristics of the pump chosen it offers a useful head to overco
66. very heat exchanger only for 750 size in all versions The units with desuperheater D or total recovery T are not available in the versions YD YT XD only for temperatures lower than 4 C XT only for temperatures lower than 4 C The NRL C condensing units are not avail able in the versions HC condensing heat pump TC condensing units with total recovery DC condensing units with desuperheater Mechanical thermostatic valve Y version Y this is the version that al lows you to produce chilled water below the standard value of 4 C to a minimum of 6 C For lower values contact the company headquarters 4 3 CONFIGURATOR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NRL 075 o K A E E E 00 Field Code 1 2 3 NRL 4 5 6 Size 075 080 090 100 125 140 150 165 180 7 Compressor 0 Standard compressor 8 Thermostatic valve j Standard mechanical thermostatic valve to 4 C Y Low water temperature mechanical thermostatic valve to 6 C X Electronic thermostatic valve also for low water temperature to 6 C 9 Model R Cooling only C Condensing system H Heat pump 10 Heat recovery gt Without recovery units D Desuperheater T Total recovery 11 Version A High efficiency E High efficiency low noise operation 12 Coils S Made of aluminium R Made of copper S Tinned copper V Varnished 13 Fans Standard M Enlarged J Inverter 14 Power supply 40
67. when the machine is being made and must therefore be specified when the order is placed It permits the reduction of the starting current needed by the machine in the start up phase This accessory can only be applied in the factory This accessory allows correct operation with outside temperatures below 10 C and down to 10 C It is made up of an electronic regulation card that varies the fan rpm on the basis of the condensation pressure read by the high pressure transducer to keep it sufficiently high for the proper functioning of the unit It also allows correct heating operation with outside temperatures greater than 30 C and up to 42 C 87 standard 68 standard DCPX M DCPX only for configurations with enlarged fans M A 65 66 66 66 68 68 68 68 68 E standard Simplified control system to switch on and off and command two chillers using Aermec GR3 command in a single system as DUALCHILLER if they were a single unit Control system to switch the individual chillers on and off and command them in a system in which several units are installed in parallel always ensuring a constant delivery to the evaporators The water accumulators with holes and supplementary electric heaters leave the factory with plastic protection caps Before loading the system if the installation of an electric heater is not envisaged it is compulsory to replace the p
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