Heat recovery units Aermec UR CF with refrigeration circuit
Contents
1. CE AERMEC COMPANY QUALITY SYSTEM ICIM ISO 9001 Cert n 0128 3 AERMEC S P A SELECTION AND INSTALLATION MANUAL Heat recovery units with refrigeration circuit IURCFPV 0709 6783480_03 Replace 0512 6783480_01 Index Declaration of conformity Remarks Description of the units Description of components Accessories Technical data Operational limits Sound data Performance variations cooling and heating Fans available static pressure Fresh air temperature variations on the change of the expelled air temperature Thermal efficiency Pressure drop air side accessories MBC SUF Dimensions Accessories Dimensions Installation and use of the unit Positioning of the supporting brackets Connection of ducts Hydraulic connections of the condensate drain FCE free cooling accessory Electrical connections Maintenance of the unit Filters Condensate drain pan Heat recovery Motor ventilating assembly Heat exchanger coil Waste disposal Diagnosis and troubleshooting FAST Aermec S p A 35044 VEE PD Italia Via Luppia Alberi 170 Tel 39 0429 806311 Telefax 39 0429 806340 www Aermecaer com Aermecaer Aermecaer com TRATTAMENTO DELL ARIA DECLARATION OF CONFORMITY We declare under our own responsability that the above equipment described as follows 1 We declare under our own responsability that the above equipment described as follows Harmonized standards2. Before starting the unit make sure that the fan vents have been ducted or include safety meshes e The unit is not designed for external installation external installations require particular technical characteristics and devices which these units cannot guarantee e During installation maintenance and cleaning wear suitable Individual Protection Devices IPD 14 1 1 General safety requirements The units are fitted with e an adhesive label fig 075a which indicates the model the gross weight and the customer an adhesive label fig 075b which indicates the main technical data such as the model nominal air volume efficiency of the heat recovery unit Installation and use of the unit Sr IG r 1W1W hl DZD ifiii io MW electrical data and performance of the coils e Each URCF unit is identified by means of a serial number on the plate N B The serial number must be indicated for future reference when contacting Aermec S p A Transport and handling CAUTION During the handling phase wear proper individual protection devices IPD Before installation and use you are recommended to fully unpack the base unit and the all the components that come with it The units are supplied packed with polythene film and as a standard on wooden pallets For transport reasons some accessories travel separately from the standard unit and are to be reassembled by the installer following the i
3. EN 378 Refrigerating system and heat pumps Safety and environmental requirements EN 12735 Copper and copper alloys Seamless round copper tubes for air conditioning and refrigeration 2 designed manufactured and commercialized in compliance with the following EEC Directive PED safety 97 23 CE Machinery safety 98 37 CE Low voltage equipment 73 23 CEE and successive modifi cations Electromagnetic compatibility EMC 89 3206 CEE and successive modifications Montagnana 04 075 2005 Managing director Paolo Gasparini Pes O This manual is an integral part of the documentation enclosed with the unit It must be kept for future reference and must accompany the machine throughout its life The manual defines the purpose for which the machine has been built and establishes its correc installation and the limits of its use e This manual describes all the use installation and maintenance instructions of the subject unit and the main accident prevention standards Carefully and thoroughly read all the information eferred to in this manual Pay particular attention to the norms accompanied by the indication DANGER or ATTENTION since f not observed may cause damage to the uni or to people If any malfunctions are found out whciha are not included in this manual please contact the local After Sales Service immediately Aermec S p A decl
4. y l E PESOS gN 85 E iO I 0 IAN OR XX 94 116 i Lu 8 H 3100 4100 460 i Circular flanges FGC accessory 380 mm Unit accessibility 20 General safety requirements VVARNINGI The URCF series units are destined for civil and tertiary use for all other applications in highly corrosive environments in potentially explosive atmospheres etc its use is not permitted e Make sure that the unit has not been damaged during transportation before installation The use of the damaged machine might be dangerous Installation and extraordinary maintenance must be performed by qualified people in accordance with the present standards e The unit must not be used to recover equipment spare parts Any use other than those indicated in this manual may generate hazards and is therefore prohibited Before performing maintenance or cleaning operations make sure that the unit is disconnected and ensure that it is not reconnected without informing the person who is presently working on the unit e During maintenance and cleaning pay attention to possible burning of the heating coils Before starting the unit make sure that the electrical parts have been connected to the earth system of the building
5. 975 WINTER MODE Room air temperature 18 C 50 RH gt corrective coefficient 0 980 Room air temperature 20 C 50 RH gt corrective coefficient 1 Room air temperature 22 C 50 RH gt corrective coefficient 1 020 Room air temperature 24 C 50 RH gt corrective coefficient 1 040 The variations of the static pressure used by the fans to change the air flow which can be set by means of the electronic regulators during the setting phase in relation to the nominal values present in the technical data table are represented in the graph of fig 5 The curve is valid for all sizes of the RFC series Keep the feed to the fans at the maximum value As an example a unit of the RFC 150 series is considered The following performances are taken from the technical data table nominal delivery flow rate 15000 m h nominal recovery flow rate 15000 m h available delivery static head 223 Pa available recovery static head 206 Pa It is supposed that the pressure drops of the air distribution system on the supply side are equal to 21000 Pa while the pressure drops of the air distribution system on the exhaust side are equal to 180 Pa Fans available static pressure M I V SNMNm 5hijn A The Effective useful pressure Nominal useful pressure reports are 21000 223 0 94 and 180 206 0 87 respectively The coefficients that can be taken from the graph are 1 08 and 1 18 Therefore the e
6. MBX MBX0 5 MBX100 MBX150 MBX210 MBX320 G4F G4F075 G4F100 G4F150 G4F210 G4F320 SUF SUFO75 SUF100 SUF150 SUF210 SUF320 FGC FGC075 FGC100 FGC150 FGC210 E FCE FCE075 FCE100 FCE150 FCE210 FCE320 MBC FGC fig 02 MODEL URCF External air nominal flow rate Recovery air nominal flow rate Minimum airflow rate Available static pressure in supply Available static pressure in exhaust Sound pressure level at 1 m Recovered heating capacity Recovered refrigerating capacity Compressor heating capacity Compressor refrigerating capacity Total heating capacity rec compr Total refrigerating capacity rec compr Total power input during heating Total power input during cooling Electric supply Heat recovery Efficiency Fans Number of fans Fans total nominal input power Fans maximum total input power Fan speed Protection class Filters Classification according to the EN779 Quantitative efficiency Refrigerating circuit compressor Winter mode compressor input power 3 Summer mode compressor input power 2 Compressor maximum power input D en eee E RD Co NS WIN WIN wo LL Pr LS CS ACCESSORIES MBC Water heating coil Rows Front surfaces Air side pressure drop at nominal flow rate Pa Heating capacity 4 Heating capacity 5 Air outlet temperature 4 Air outlet temperature 5 MBX ELECTRIC HEATING COIL Alimentation Heating capacity Air side pressure drop
7. been completed the regulators no longer need to be touched 1 Fan power supply 230 V nominal airflow rate without accessories 2 Operating conditions return air 26 C 50 external air 34 C 50 3 Operating conditions return air 20 C 50 external air 5 C 80 4 inlet outlet water temperature 70 60 C in condition 3 with compressor running 5 inlet outlet water temperature 45 40 C in condition 3 with compressor running 6 Ata free field distance of 1 m with ports canalized 7 In condition 3 with compressor running Operation limits In their standard set up the equipment is not suitable for installation in a saline environment The maximum and minimum limits of the airflow rate to the exchanger are indicated by the curve of the pressure drops diagram Refer to fig text C 043 for the operating limits Summer mode Winter mode heat pump 46 N B Please contact Aermec technical sales office in the event it is necessary to operate the machine outside the limits indicated in the diagram tint C o o o a 3 n ET o a o Y 0 18 30 tint C 7 16 30 fig 03 DI 100150 ZIO 820 Max external temperature during cooling C 46 46 46 46 46 Min external temperature during cooling C 100 100 100 100 100 Max internal temperature during cooling C 30 30 30 30 30 Min internal temperature during cooling TG PB ie 18 18 18 Min external temp with heat pump oper
8. condensate drain pan of the heat recovery unit e remove all bottom panels e disassemble the cross bar e disconnect the pan from the condensate drain pipes e disassemble the pan supporting brackets e clean the pan e replace all parts in reverse order In order to access the condensate drain pan on the coil module detach the module from the unit and disassemble it Heat recovery The heat recovery unit can be cleaned with a jet of compressed air or cold water To disassemble the heat recovery unit e remove the condensate drain pan e remove the heat recovery unit supporting brackets e clean the heat recovery unit e replace all parts in reverse order At the end of their operating life the URCF units must be disposed of according to the present laws The main components including the unit of the URFC series are made from e Galvanised sheet steel panels condensate drain pan fans Motor ventilating assembly The motor ventilating assembly needs to be checked to see how clean the rotor is whether there is corrosion or damage and whether there are abnormal noises If necessary disassemble the motor fan assembly as follows e remove all inspection panels e disconnect the power supply cable e unscrew the four screws that hold each of the motor fan assemblies to the frame e check the motor fan assemblies and replace them if necessary e replace all parts in reverse order
9. high pressure switch ePressure switch out or order e Excessive refrigerant e Presence of incondensable gas in the refrigerating circuit e The condensate coil is not sufficiently covered in air e Blocked refrigerant filter 28 e Check and replace e Discharge excess gas e Refill the circuit after having discharged and placed in vacuum e See point 1 e Check and replace 100 The compressor does not start due to the intervention of the low pressure switch e Pressure switch out of order e Machine completely empty e Poor air flow e Blocked refrigerant filter eThe thermal expansion valve does not function correctly e Check and replace e See point 11 e Check the air duct and the state of the filters e Check and replace e Check clean or if necessary replace it e Check the refrigerating circuit with a leak detector 13 The refrigerating circuit functions correctly but with insufficient proficiency e Lack of refrigerant e Presence of humidity or incondensable in the refrigerating circuit e See point 11 e Replace the filter and if necessary drain and refill the circuit 14 Compressor suction tube frosted Thermal expansion valve e Poor air flow e Lack of refrigerant Blocked liquid filter e Check the valve and if it is not working correctly replace it Check filters fans and ducts e See point 11 e Clean or replace e Vibrations in the pipes e Noisy compressor e Noisy therm
10. pump refrigerating circuit allows in most applications and in the most common external air temperature conditions in addition to the neutralisation of the heating load of the external air to supply an adequate heating and cooling capacity to compensate the internal heating loads Fig 4 illustrates the graph from which it is possible to take the coefficients to be multiplied by the nominal values which are present in the technical data table so as to be able to determine the total refrigerating and heating performance based on the outside conditions Heating capacity Refrigerating capacity 0 9 Multiplicational coefficient 0 8 0 7 10 5 0 5 10 Internal air temperature Summer operation 26 C 50 RH Outdoor air temperature C 15 20 25 30 35 40 Internal air temperature Winter functioning 20 C 50 RH fig 04 Corrective coefficient for the cooling capacity according to the variation of the room temperature in summer and winter mode SUMMER MODE Room air temperature 22 C 50 RH gt corrective coefficient 1 050 Room air temperature 24 C 50 RH gt corrective coefficient 1 025 Room air temperature 26 C 50 RH gt corrective coefficient 1 Room air temperature 28 C 50 RH gt corrective coefficient 0
11. to the nominal airflow Pa Stages Electric heating element power input Air outlet temperature 7 MANIFOLD DIAMETERS Condensate drain pan discharge diameter LL EL Technical data 075 100 150 210 320 m h 750 10000 15000 210000 32000 m h 750 10000 15000 210000 32000 m h 640 850 1275 1785 2800 Pa 256 2101 223 146 267 Pa 244 203 206 134 246 dB A 53 55 57 59 62 kW 3 2 4 7 6 6 9 8 14 9 kW 0 9 1 3 2 2 9 44 kW 5 3 6 7 9 5 14 1 16 6 kW 46 6 4 8 3 14 150 3 kW 8 5 11 4 16 1 23 9 31 5 kW 55 i 100 3 16 9 19 7 kW 1 8 23 3 7 4 5 5 kW 3 3 6 5 6 7 8 ph V Hz 1 230 50 1 230 50 3 N 400 50 3 N 400 50 3 N 400 50 51 56 4 52 8 55 6 53 9 n 2 2 2 2 2 kW 0 75 0 75 1 2 1 2 2 1 A 5 5 8 6 8 6 13 2 settable settable settable settable settable settable IP 55 55 55 55 55 G3 G3 G3 G3 G3 80 80 80 80 80 kW 1 2 1 7 2 6 3 4 3 8 kW 2 4 3 4 5 6 5 8 A 100 9 14 6 7 9 7 11 1 075 100 150 210 320 no 2 2 2 2 2 m 0 13 0 13 0 24 0 24 0 29 11 19 17 25 41 kW 4 5 55 8 4 11 150 6 kW 1 4 1 7 2 7 Sb 5 C 46 45 45 44 42 SG 34 320 320 320 32 075 100 150 210 320 3 400V 50 Hz kW 3 4 5 6 9 12 100 100 100 100 100 no 1 i 1 1 1 A 46 6 9 1 12 19 7 C 47 45 45 45 41 MANIFOLD DIAMETERS 1 a 1 chi 3 4 3 4 3 4 3 4 3 4 Water coil manifold diameter Caution the electronic regulators that are incorporated in the machine allow to regulate the air flow in the limits indicated in the previous table in order to set the system Once setting has
12. Heat exchanger coil To maintain an efficient heat exchange the coils must be cleaned with a jet of compressed air and the circuit water coil must be free from air To access the heat exchanger coil of the MBC accessory disconnect the module from the unit and disassemble it Filters Heat exchanger coil Condensate pan Heat recovery unit Check their cleanliness twice a week Check integrity of pack each year Check cleanliness each year Check integrity of the deck each year The table indicates the maintenance operations concerning each component indicating the type of check to perform and when it should be performed The frequency is approximate and varies depending on the working and environmental conditions in which the heat recovery unit operates Waste disposal rT _ r dr E S OI e the cooling gas is recuperated by specialised personnel and forwarded to the disposal centre e aluminium sheet metal coil fins dampers electrical motor casing e copper coil tubes electric motor winding e the compressor lubrication oil is also recuperated and forwarded for disposal e polyurethane foam insulation of the sandwich panels e rock wool silencers 27 1 Insufficient air flovv rate 2 Excessive air flow rate 6 The compressor does not start 7 The compressor does not start Diagnosis and trouble shooting ame ESE Fans rotation speed too low Pressure drop of the distrib
13. ain The unit and the coil and silencer module are equipped with L supporting brackets for horizontal installation N B You are recommended to place rubber dampers between the brackets Rubber snack absorbers not supplied and the walls to decrease the vibrations Glue generated by the unit not LP supplied f Check the dimensional layout in this ds manual for the correct positioning of 2 the brackets e drill the wall in correspondence with the points indicated in fig 09 point 1 disassemble the brackets from the unit or from the coil or silencer module by unscrewing the screws in correspondence with the holes point 2 screw the brackets to the wall screws not supplied in correspondence with the holes point 3 in correspondence with the holes point 4 partially tighten one screw for each bracket to the unit or to the coil or silencer module 22 Connection of ducts CAUTION never start up the unit when the fan ports are not ducted or covered by protective mesh See fig 100 for the installation of the ducts e use adequate brackets to sustain the ducts in order to avoid that the recovery unit is overloaded by their weight connect the supply and exhaust ports to the ducts using vibration damping joints olona cloth The vibration damping joint must be screwed to the panel with self tapping screws positioning the screws inside the border highlighted in the following
14. and regulation section including the three way valve for the additional hot water coil and related servomotor aimed at guaranteeing the management of all refrigerating circuit functions Also present NTC temperature probe on the internal air recovery external air temperature probe air damper and related servomotor in the free cooling version pressure probe on the recovery filter A remote control terminal is also supplied for the automatic management of the unit remotable up to 1500 meter cable not supplied The unit is equipped for the management of a luminous sign 230V which switches on in case of generic alarm or unit OFF in conformity with the norms in force for rooms for smokers The following operations can be performed on the microprocessor switching on and off of the unit summer winter changeover setting of set point parameters reading of room temperature N B For further information refer to the User manual MBC Hot water coil module This is an external module that can be installed downstream from the motor fan assembly on the fresh air flow fitted with Two row water heating coil with copper pipes and aluminium fins with P2519 geometry The manifold collectors are equipped with a 4 G UNI 3208 threaded connector for the water inlet and outlet The three way valves and related ON OFF actuator are also included MBX Module with electric heating battery This is an outside module that
15. arefully follow the indications in the sections below when installing the equipment The sections are in chronological order in order to make each phase of the installation easier The necessary technical space must be verified before installation fig 08 e for the arrangement of the supply and exhaust ducts as well as those for the free cooling e for the dampers with free cooling function e for the passage of the power supply BAST 227222 CE MONTAGNANA PADOMA ITALY RCFmmaaxxxxX Med RCFXXXX cono PACKAGE MONOBLOCCO PESO LORDO GROSS MOT rows sur snurromenme KG XXX CLIENTE fig 075 a Y FAST immens CE Matr RCP mmaa XXXXX e for the components three way valves condensate drainage traps etc a without which the correct functioning Key of the unit can not be guaranteed Z Les A 800 mm e for the correct cleaning and a maintenance operations D 200 mm In particular e a space of at least 200 mm must be available for the trap in correspondence with the condensate drain fig 11 fig 08 Positioning of the supporting brackets The unit must be positioned on a flat surface to avoid e the drainage of the motor fan assemblies caused by weight imbalance e the incorrect functioning of the condensate dr
16. ating eC 100 100 100 100 100 Max external temp with heat pump operating 1 25 DB di dE 25 Max internal temp with heat pump operating C 30 30 30 30 30 Min internal temp with heat pump operating C 16 16 16 16 16 Sound data e Data outside the panel the data are calculated at the following conditions 1 m distance from the unit ducted supply vent and in free field 075 56 55 51 50 49 44 40 320 60 53 64 100 59 60 54 52 50 45 41 35 64 55 66 150 62 65 57 54 51 47 42 36 68 57 68 210 64 69 60 55 52 48 43 38 71 59 70 320 67 74 63 57 53 49 44 39 5 62 73 e Sound data on the supply fan vent Sound pressure measured at 3m distance from the free vent of the supply fan 075 65 57 54 57 54 50 53 48 67 0 60 100 66 58 56 60 57 57 57 52 68 8 64 150 67 59 58 62 60 61 63 57 71 1 68 210 66 61 58 67 62 65 68 63 73 8 72 9 320 69 61 59 64 71 71 63 58 76 1 15 5 Sound power level from the supply vent 075 57 64 59 61 62 58 51 44 68 7 65 3 100 59 69 63 66 66 63 57 50 73 3 70 150 57 68 63 65 66 64 59 52 72 9 70 3 210 53 65 60 66 66 65 61 54 72 3 70 8 320 61 71 68 71 71 71 68 62 78 2 76 6 SUF 9 0 2 5 5 9 14 11 Performance variations cooling and heating rr i e iff 5 ff J J i The URCF series heat recovery unit with refrigerating circuit allow the renewal of the internal air giving the necessary hourly change in order to obtain the ideal comfort conditions The use of a high efficiency cross flow heat recovery unit and a heat
17. blown out the electrical connections have been made correctly the line voltage is within the permitted allowance 100 of the rated value Unit start up For detailed information regarding the operating parameter settings and all other machine or control card operations consults the user manual CAUTION Make sure that all the instructions have been complied with before carrying out the Electrical connections Fe Oll O OMU O aU ai currently in force Every electrical user must be connected to the system s earthing system Use the connectors with the earth symbol to connect the earthing of the unit and possible accessories to the earthing of the building Respect the installation power supply and environment conditions Keep the panel and wiring away from electric and magnetic fields that could disturb such as inverters high voltage power supply lines etc CAUTION Once the connections have been made check that all the cables have been correctly connected and that there are no short circuits between terminals and the terminals and ground the electrical terminals both within the electrical panel as well as in the terminal board of the compressor are secured and that the mobile and fixed contacts of the remote control switches do not show signs of wear Do not block the air intake of the panel TAB 3 Operating voltage Frequency Operating room umidity Altitude up to 10000 m a s
18. can be installed downstream from the motor fan assembly on the fresh air flow fitted with Electric heating element with armoured finned elements equipped with double safety thermostat with automatic and manual reset Accessories G4F G4 efficiency filters The units can be fitted with two cell type filters with corrugated septum in class G4 according to the UNI EN 779 classification weighted efficiency of 90 which can be placed as a replacement of the G3 filters The filtrating cell is 48 mm thick SUF Module with silencers The accessory is made up of two modules that are equipped with silencer baffles positioned on the supply and exhaust They are made of rockwool panels with the surfaces in contact with the air and protected by a polyester film held between two galvanised and micro perforated laths FGC circular flanges The accessory is supplied as a single unit The accessory is made up of flanges which connect to the rectangular port of the unit so as to allovv the use of circular ducts The accessory is not available for size 320 N B for further information see the tables in this manual and the various accessories hits see fig 02 below regarding compatibility FCE Free coolin The free cooling kit includes 2 dampers with related ON OFF 230V servomotors For further information refer to the Use manual MBX SUF Available accessories MBC MBC075 MBC100 MBC150 MBC210 MBC320
19. e mono bdamper solution to the needs of systems normally used in bars restaurants offices meeting rooms The URCF units which are divided into five sizes with a rated airflow from 750 to 32000 m h have been designed to guarantee a healthy thermo humidity condition allowing a suitable change of air in order to reduce the build up of gas and unwanted particles present in the environment to be treated cigarette smoke unpleasant odours sweat dust is he RFC unit in addition to the ventilation filtration and recovery of Description of the unit el heat also includes in a mono bdamper unit a heat pump refrigerating circuit This allows to obtain a complete machine which operates independently in all seasons and which is capable of combining the necessary renewal of air with an efficient recovery of heat The accurate design of the machine combines the extremely compact size which makes installation on suspended ceilings easier with easy accessibility for the maintenance of all internal parts This gives the opportunity also thanks to the management and installation simplicity to satisfy many system requirements Available versions The RFC units are available in 5 sizes Each model can be configured in such a manner to satisfy the system requirements by suitable combining the available options The table in fig 01 shows the procedure of the commercial acronym in the 5 fields from which it is made which repr
20. er side of the MBC accessory coil Q o MBC 33 A o N o N B The pressure drops illustrated in the diagram also include those of the three way valve Pressure drop water side 100 600 1100 1600 2100 2600 fig 08 Water flow rate I h 13 Dimensions URCF 075 100 g Expulsion of exhaust air or inspection of By pass for refrigerating circuit Externalair Exhaust Supply External air free cooling suction fan fan suction Lo D o o 2 SE pot ot ae ot 2 NY n Dn 450 285 224 i S ii 2 Expulsion of exhaust air or inspection of Electric refrigerating panel circuit 60 450 eights and centres of mass kg Gx Gy URCF 075 21050 700 650 URCF 100 220 700 650 14 URCF 150 210 Exhaust Supply External air nates fan fan suction 9 s i En 2 si sb o w o Si o7 iS 2 L a N n Bd 550 gi E Ta Le B ed 7 11570 680 0 1800 Expulsion of exhaust air or inspection of refrigerating circuit Electric 60 550 panel Weights and centres of mass kg Gx Gy URCF 150 305 800 750 URCF 210 320 760 750 Expulsion of exhaust air or inspection of refrigerating circuit External air suction s
21. esent the options present Exhaust air expulsion or inspection refrigerating cil External air intake Field 1 2 3 URCF Field 4 5 075 100 150 210 320 Exhaust air expulsion or inspection refrigerating circuit External air By pass for intake free cooling fig 01 Internal air supply Internal air recovery Panels and structure the structure is made up of 20 mm thich galvanised self supporting sandwich panels with injected polyurethane insulation density of 40 kg m The construction of the casing simplifies installation and maintenance Fans double intake centrifugal fans with forward curved blades and with directly connected motor The 230V 50 Hz single phase motor has one speed The airflow is controlled by an electronic regulator at phase cut The two regulators are set in the factory so as to sup ply the nominal performance the air volume may be varied by 150 to the nominal airflow not to endanger the correct opera tion of the unit Refrigerating circuit this is a highly efficient and silent heat pump with scroll compressor four way valve for cycle inversion evaporating coil condensing coil liquid receiver liquid separator double thermostatic valve liquid indicator for the 1500 21000 3200 versions only and filter drier high low pressure switch Condensate drain pan made of peraluman easily detachable Evaporating condensating coil w
22. ffective flow rate on the supply side is 15000 x 1 08 1620 mc h the effective flow rate on the exhaust side is 15000 x 1 18 1770 mc h 1 30 1 20 Ei El a Q o el o 4 O o Q 6 Effective useful head Nominal useful head 00 el o al el 0 40 0 80 0 85 0 90 0 95 1 00 Effective flow rate nominal flow rate 1 05 1 10 1 15 1 20 1 25 fig 05 11 Fresh air temperature variations on the change of the external air temperature Summer use The following charts allow to determine the variation of the temperature within 4 the room on the variation of the external 3 ITA aa conditions The variability of the air flow 2 E NOMINAT RA 4 0 is that allovved to guarantee that the refrigerating circuit operates correctly To the nominal air flow 150 o N B The following diagrams are typical for all sizes but without accessories At the nominal air flow 150 Variation of the inlet air temperature C do 39 38 3 36 35 34 33 32 31 30 29 28 27 26 25 External air temperature C Conditions exhaust air 26 50 R H Winter_use t the nom
23. fill with refrigerant but empty the unit completely and refill it with the foreseen amount In the event of replacement of one of the refrigerating circuit parts do not leave the circuit open for more than 150 minutes In particular in the event of replacing the compressor complete the installation within the above mentioned time after the rubber plugs have been removed When empty do not switch on the compressor do not compress the air within the compressor When using R4075C gas bottles it is recommended to take care of the maximum number of drawings permitted in order to guarantee the correct ratio of components of the R4075C gas Maintenance of the unit ae a a The RFC series recovery units have been designed to require very little maintenance and to make every operation easy Some simple pieces of advice follow for the proper maintenance of the unit Filters Filter cleaning is imperative to maintain high air quality in the room The synthetic filters installed in the URCF unit can be regenerated with compressed air or can be washed with cold water To disassemble the filters 26 e remove the inspection panel with knobs e remove the filters e clean the filters e replace all parts in reverse order Condensate drain pan Dirt can hoard up in the condensate drain pan You are therefore recommended to clean the pan regularly and check that the discharge pipe is not clogged To remove the
24. inal flow rate 150 20 gt 5 8 45 E At the nominal flow rate s 10 D is 9 t the nominal flow rate 150 2 0 oO gt 5 7 5 3 11 3 5 7 9 11 13 14 17 19 21 External air temperature C Conditions exhaust air 20 50 R H 12 Thermal efficiency Pressure drop air side for accessories MBC SUF The diagram in fig 06 allows to determine the coil thermal efficiency of the MBC accessory for each model based on the Td of the inlet water and Td of the inlet water air The corrective factor to multiply for the nominal capa city value are present in the technical data table Corrective factor External air temperature C fig 06 60 Pa 50 40 SUF 33 301 MBC 15 21 Fig 075 illustrates the pressure drops Pa on the air side based on the flovv rate for the MBC and SUF accessories 20 Pressure drop air side SUF 07 10 0 500 1000 1500 2000 2500 3000 3500 4000 8075 Air flow rate m3 h kPa de MBC 15 21 Fig 08 illustrates the pressure drops H mec 07 10 kPa wat
25. ines all liability for any damage caused by the improper use of the machine or the partial or superficial reading of the information contained in this manual DD Installation and maintenance must be performed by qualified and experienced personnel having the requirements that are foreseen by law 46 90 and or the DL 380 2001 for the electrical electronic and air conditioning installation with consequent registration at the local CHAMBER OF COMMERCE if this is not so Aermec S p A declines all responsibility regarding the safety of the product THE MANUFACTURER DECLINES ALL LIABILITY FOR DAMAGE TO THINGS OR INJURY TO PERSONS AND ANIMALS CAUSED BY THE FAILURE TO OBSERVE THE INSTRUCTIONS AND STANDARDS IN THIS MANUAL Although suitable risk analysis have been performed during the design of the URCF unit PAY ATTENTION to the pictograms on the machine which help understand Remarks the manual better rapidly catching the attention of the reader concerning the risks which can not be avoided or sufficiently limited through the use of technical protection means and measures GENERAL HAZARD SIGNAL Carefully adhere to all the indications next to the icon Failure to comply with the instructions may generate hazardous situations with possible damage to the health of the operator and user in general DANGEROUS ELECTRICAL VOLTAGE SIGNAL Carefully adhere to all the indications next to the icon The signal indicates component
26. ith Cu grooved tube and high efficiency AI fins Filters these are cell type with an corrugated septum positioned before the recovery unit on airflow supply and return The standard filters are class G3 type in accordance with classification UNI EN 779 with weighted efficiency of 80 They are 48 mm thick and are easily withdrawn for cleaning and replacement Dirty filters pressure switch a differential pressure switch is present pla ced close to the electronic controllers for the detection of the choking of the supply filter It is possible to set the intervention value Thre pressure switch includes clean contacts NA NC to remote the alarm Heat recovery unit this is static with crossflow made of aluminium sheets During winter operation the average efficiency is above 50 ensuring first class energy recovery from the air expelled from the room Description of the components URCF Compressor Electric panel Centrifugal fan G3 filter Heat recuperator Heat exchanger Condensate drain Electronic regulators ON OU RW SO Support brackets allow the unit to be rapidly and securely fixed to the false ceiling Accessibility The unit may be inspected from below The heat recovery unit filters condensate drain pan and fans can be easily removed from below by removing the lower two panels Control system The unit is equipped with an electrical panel with power
27. l EN60204 Operating room temperature 100 of the rated voltage EN60204 1 of the continuous frequency 2 for short periods from 30 to 95 without condensate or the formation of ice EN60204 from 5 C to 40 C commissioning checks Before the first start up of the heat recovery unit check the following points e the exact positioning of the panels in correspondence with the motor ventilating assembly that require opening by means of a screw driver e the fixing of the unit to the wall e the earthing of the unit to the buildings earth system e the connection to the ducts e the condensate drain connection to the trap e the insulation of the tubes to the coils e the ground wires of the electrical components e the absence of air in the water coils In particular check that e the electrical connection has been performed correctly and that all terminals have been sufficiently tightened e the voltage on the terminals is 230 V 25 5 for units with single phase power or 400 V 5 for units with three phase power If the voltage is subject to frequent change contact our Technical department in order to select the necessary protection e there are no leaks of refrigerant through the use of a leak detector CAUTION Before start up check that all the panels of the unit are in place and secured with the screws Checks during operation Check the rotation of the compressor
28. layout avoiding that the olona cloth joints are over stretched point 1 connect a earth wire to the vibration damping joint to act as a jumper to guarantee the unipotentiality between the ducts and the recovery unit place the supply duct with a straight section of at least one meter before the bends branches etc and make sure that the ductling does not have inclinations of the divergent sections greater than 7 Hydraulic connections of the condensate drain The condensate drain pan is provided with a 1 diameter threaded discharge pipe G UNI 3208 The drainage system should feature an adequately sized trap to e freely discharge the condensate e prevent the undesired entry of air into the vacuum systems e prevent the undesired exit of air from the pressure systems e prevent the infiltration of odours or insects In the lower part of the syphon must have a bleed cap or must anyway permit Aermec dismantling for its cleaning Rules to follow for the scaling and production of the syphon are given below max divergence 7 H1 2P H2 H1 2 Pa where P is the pressure expressed in mm of the water column 1 mm c a 9 81 fig 11 23 The assembly of the free cooling kit accessory must be performed by qualified personnel in accordance with the present standards and must be made following the indications in the electrical layout supplied with the unit The compressor i
29. nstructions in this manual Transport Refer to the weight indications on the plate on each unit in order to transport the unit safely In any case the following precautions must be taken when transporting the unit e The unit and its accessories if any must not be subject to intense knocks which could compromise the integrity of the structure and internal parts e The unit and possible accessories must be suitably secured to the platform of the transportation by means of cables or similar in order to prevent its movement e the unit and accessories must be protected in order to prevent protruding parts such as the coil connections condensate drain electrical components etc from being knocked during transport e the items must be protected against bad weather during transport Checks at material receipt 21 When the unit is received it is necessary to carry out an initial inspection to make sure that e all parts are present e the unit and accessories are not damaged If there are signs of damage it is necessary to specify it on the carriage note The controls are the following e integrity of the finned coil manifolds and condensate trays e water connections that these are protected with the rubber plugs If they are not provide suitable closure devices e integrity of the panels e integrity of the electrical panel and electrical electronic parts Installation You are recommended to c
30. o 15 URCF 320 Exhaust fan Supply Pesi e baricentri kg Gx URCF 320 400 850 qe Expulsion of exhaust air or inspection of External air By pass for refrigerating suction free cooling circuit tenal alr suction Ay 2 e I ol ott 600 80 600 i Gy 800 LLA i 7 i I L a 115 70 680 70 680 10115 1800 Expulsion of exhaust air or inspection of refrigerating circuit Electrical 60 600 ganel 16 Accessories Dimensions Inspection panel set Lower panel bdampering profile Upper fixing bracket Silencer Baffles fixing bracket Duct accessories connection flange cl a gt DE Mod mm URCF 075 100 URCF 150 210 URCF320 A 600 600 600 B 835 835 835 C 400 500 550 D 30 30 30 E 31 5 31 5 31 5 F 537 537 537 G 3207 437 487 H 490 490 490 I 50 50 50 L 632 632 632 M 1008 1008 1008 MBC Water coil modules MBX Electrical coil modules MBC MBX A 600 600 600 B 435 435 435 C 400 500 550 D 30 30 30 E 31 5 31 5 31 5 F 537 537 537 G 3207 437 487 H 250 250 250 l 50 50 50 L 632 632 632 M 28 28 28 N 40 40 40 O 85 85 85 P 278 278 278 Q 127 127 127 i Dampers and actuators included in the free cooling kit c Fori 8 mm C g J 8 a fo ko um O 85
31. ostatic valve e Secure the pipes e Check electrical phases connection e Check and add refrigerant 16 Evaporator coil e Lack of refrigerant in the circuit before bubbles visible in the indicator e Thermostatic expansion valve over closed suction pipe too hot e Thermostatic expansion valve over closed expansion valve bulb partially blocked or pressure intake pipe blocked e Filter drier blocked bubbles in the flow indicator and liquid pipe colder at the filter drier outlet e The manifold feed pipes are blocked or oil has accumulated in the coil not all of the evaporator circuits are working e Check for leaks and eliminate them topping up with refrigerant e Reduce the overheating of the thermostatic expansion valve turn the valve stem and check the suction pressure e Change the valve or free the control pipe e Change the filter drier e Remove the obstruction clean or change the evaporator e Thermostatic expansion valve over closed excessive overheating of the evaporator discharge gas e Reduce the overheating of the thermostatic valve 18 Compressor to cold and noisy e Expansion valve over open the system works with the overheating to low return of liquid to the compressor e Thermostatic valve out of order the stem or the seat of the expansion valve is corroded Pressure inlet pipe blocked e Foreign objects between the stem and the seat of the thermostatic valve abnormal func
32. ry CAUTION Before assembling the free cooling kit make sure that the power is not connected to the unit Damper A EXTERNAL INTERNAL Y gt A fig 12 MES O MA Exhaust damper Se actuator tasca EAST A 2 EXTERNAL Room temperature probe already present Qutside air MESF temperature Free cooling epee Damper actuator present P fig 13 24 The unit is completely vvired in the factory and requires the power supply intercepted with inline protections indicated on the unit specification plate in order to be started The installer should define the power supply line based on the length the type of cable the absorption of the unit and the displacement TAB 3 AII electrical connections must be in accordance with the present standard at the moment of installation CAUTION Refer to the electrical layout supplied with the equipment for installation needs Check that all power cables are correctly secured to the terminals when switched on for the first time and after 30 days of use Afterwards check the connection of the power cables every six months Slack terminals could cause the cables and components to overheat The electrical wiring and connections must be done persons qualified to do so in accordance with regulations Before start up Before start up check that the system has been charged and the air has been
33. s which are energised by a 3 phase system if the suction pressure does not decrease and the supply pressure does not increase to the normal values switch off the power and invert two phases of the three core input cable and turn the power back on to check that this was not incorrectly connected never modify the internal wiring connections otherwise the warranty will no longer be valid The air flow rate values must not be lower than 150 of the nominal values indicated in the technical specifications table If an electrical resistance is present check the cut in by measuring its electrical absorption CAUTION During the maintenance phase wear proper individual protection devices IPD Before performing maintenance and or cleaning operations on the unit make sure the unit is disconnected from the power supply and that it can not be turned back on without the knowledge of the person performing maintenance and that the heat exchanger coils are not working e During maintenance the weight of the inspection panelling could hinder the work Requirements of gas R4075C The circuit chillers that work on R4075C cooling gas require particular attention during assembly and maintenance to prevent operating faults Therefore it is necessary to Avoid refilling with oil different from the one specified and already used in the compressor If there are gas leaks causing the unit to be even partially empty do not re
34. s of the unit or in this manual specifies actions that could generate electrically related risks GENERAL PROHIBITION SIGNAL Carefully adhere to all the indications next to the icon that limit actions in order to guarantee better operator safety MAIN WARRANTY CONDITIONS e The warranty does not cover payment for damages cause by the incorrect installation of the unit by the installer e The warranty does not cover payment for damages cause by the improper use of the unit by the user e The manufacturer is not responsible for accidents to the installer or user that are due to the improper use and incorrect installation of the unit The warranty is not valid when e the maintenance and repairs have been performed by unauthorised persons or companies e the unit has been previously repaired or modified with spare parts that are not original e the unit has not undergone suitable maintenance e the instructions described in the present manual have not been followed correctly e unauthorised modifications have been made N B The Manufacturer 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 which have already been delivered or are being built The warranty conditions are any subject to the general sales conditions at the moment the contract is finalised The URCF series is th
35. s off during the functioning of the unit in the free cooling mode The temperature settings are pre set at fixed values on request these values can be changed by contacting the After Sales office See the indications in fig 12 for the installation of the free cooling kit Operation The free cooling function foresees that the air expelled from the room does not affect the heat recovery unit passing directly to the outside through a duct connected to the damper B Thus the fresh air flow passes through the filter and the heat recovery unit without being touched by the heat recuperator In order to use the free cooling function a duct is required to connect to damper A and another to connect to damper B The two dampers A and B have an opposing function When the outside temperature is close to the ideal temperature of the room damper A is closed while damper B is open Damper A can be positioned on the side as indicated in the line diagram The compressor is off when the unit is operating in free cooling Assembly of the accessory For the assembly of the free cooling accessory please refer to fig 13 and 14 e place the two dampers with servomotors MES and MESF as in the previous diagram e make sure that the damper with the MES servomotor is closed during the free cooling function while the damper with the MEFS servomotor is open opposing functions e connect the damper servomotors FCE free cooling accesso
36. tion of the thermostatic valve 29 e Measure and reset the overheating by closing the valve e Replace the valve or free the pressure inlet pipe e Clean the stem and the holes of the thermostatic valve NOTE NOTE AERMEC S p A 37040 Bevilacqua VR Italien Via Roma 44 Tel 39 0442 633111 Telefax 39 0442 93730 39 0442 93566 WWW aermec com carta riciclata 1509001 Cer 01203 recycled paper papier recycl recycled Papier SIONet CE Technical data shown in this booklet are not binding Aermec S p A shall have the right to introduce at any time whatever modifications deemed necessary to the improvement of the product AERMEC SPA
37. ution system underestimated Blocked filters Blocked intake grating Coil incrustation Fans rotation speed too high Pressure drop of the distribution system overestimated Filters not fitted Power supply off Electric motor burnt out Excessive flow rate Bearings worn or defective Foreign objects on the fan blades Trap Blocked No trap or incorrectly carried out Defective connection or contacts open Thermostat does not respond Safety device does not respond Defective compressor Compressor burnt out or seized Compressor remote control switch de energised Power circuit open e Clean the components increase the fan speed e reduce the fan speed e Fit filters e Make sure power supply is available e Replace the electric motor e Reduce flow rate e Replace bearings e Clean blades e Clean trap e Use an adequate trap e Check the voltage and close the contact e System at temperature no request check the setting and the functioning e See point 9 and 100 e Replace compressor e Replace compressor e Check the voltage across the operating time of the protection automatic compressor shutdown e Check why the protection cut in compressor automatic shutdown 8 The compressor starts and then stops e Defective compressor remote control switch e Defective compressor e Check and if necessary replace it e Check and if necessary replace it 9 The compressor does not start due to the intervention of the
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