Gas Fired Absorption Chillers and Chiller-Heaters

Transcription

1 GA High Efficiency Gas Fired Absorption Chillers and Chiller-Heaters Heating and cooling Process applications Refrigeration Air-conditioning in tropical areas CERTIFIED VISION 2000 maggio 2001 QUALITY SYSTEM

2 Models Heating and air conditioning unit AYF model. Outdoor unit of kw for air conditioning and 32.5 kw for heating. Available models with 2 and 4 pipes. RTYF /2 model. Outdoor unit of kw for air conditioning and 65 kw for heating, completely pre-assembled. The RTYF units are available in various combinations. Air conditioning unit ACF model. Outdoor unit of kw for air conditioning. Completely safe and reliable: efficiency today and in the future. Environmentally friendly. RTCF model Outdoor unit of kw for air conditioning completely pre-assembled. The RTCF units are available from to kw. 2

3 Robur Series GA Gas Fired Absorption Chillers and Chiller-Heaters Cooling in Summer Heating in Winter The Robur appliances are single effect gas fired High Efficiency Water Chillers incorporating an air cooled condenser for outdoor installation. Based on the absorption refrigeration cycle, with the natural solution of water and ammonia, for the production of chilled water down to 3 C. Produced in 16 models with capacities between and kw for cooling and from 32.5 kw to 130 kw for heating. Low noise version available. Robur GA series are also available in TK version for heavy duty applications, HT version for tropical zones and LB version for refrigeration. More than 12,000 users in Italy have already chosen gas absorption appliances (water-ammonia). In the whole world more than 360,000 units have been istalled. Following you can find the reasons of choice. 3

4 The complete answer to every demand For domestic use. Complete service. Heating, air conditioning and hot water for sanitary uses, all with the same appliance and with the same installation. The High Efficiency Robur units can be supplied as air conditioning units only. The entire gas installation is external to the building. For banks and insurance companies. Guarantee of continuity. The Robur units do not use a compressor for air conditioning and have only 3 (Condenser Fan Motor, Burner Gas Fan Motor, Hydraulic Pump Motor) mechanical parts in motion. So, that what does not exist, can not be broken or incur wear. For hotels and restaurants. Reduced running costs. Reduced running costs for both cooling and winter seasons due to less expensive gas comsumption. For museums and public service. The Robur units respect the environment, because they use only natural substances such as water, ammonia and not synthetic fluids like HCFC or HFC. For the shopping malls. Less electrical energy consumption. The Robur units reduce 88% of the electrical energy consumption compared to traditional electric systems. Does not require an additional energy supply, therefore it is not necessary to build an electrical substation. For industry. Minimised operational costs. The Robur units use gas for air conditioning. They require only 2.51 m 3 /h of the Natural gas and 0.82 kw/h of the electric energy (single phase), to produce kw of cooling output. 4

5 For tourist centres. Complete flexibility. Modular for capacity control. With the Robur units it is possible to install a modular system, for both heating and cooling, only for the areas which require it, using the capacity required to suit the various seasonal and ambient thermal conditions. For hospitals and clinics. Integration into existing chilled water system, increasing existing installation capacity without increasing overall electrical site demand. The Robur Units can regenerate the reduced cooling capacity of old traditional chiller systems in existing installations. They offer the facility to expand capacity due to changes in both climatic conditions and increased demand. The modular gas system eliminates the risk of total system breakdown and loss of chilled water service when compared to an electric central chilling plant. For exhibition areas. Use all technical areas. The Robur units do not require any specific plant room, because they are installed outdoor. This permits more rational use of the internal building areas. With Robur you can heat and cool domestic residences, hotels, tourist villages, shops and trading centers, industrial plants and offices, schools, clinics and museums. 5

6 The flame that cools The High Efficiency Robur chillers use the absorption cycle (water - ammonia) gas fired, in a completely sealed circuit. REFRIGERANT HEAT EXCHANGER RESTRICTOR EVAPORATOR CONDENSER/ ABSORBER RECTIFIER RESTRICTOR RESTRICTOR B U R N E R PRE-ABSORBER GENERATOR SOLUTION PUMP WEAK SOLUTION STRONG SOLUTION VAPOR REFRIGERANT LIQUID REFRIGERANT CHILLED WATER The flame, water and ammonia: the natural motor of the Robur GA. The flame that cools. This apparent paradox has a precise scientific explanation. In synthesis: thermal energy instead of mechanical energy as the air conditioning drive. In the Robur GA the ammonia water solution is heated by the gas burner in the generator; the ammonia evaporates and separates from the water. Then it is piped to the heat exchanger, where cooled by the temperature of the external air flow it condenses to a liquid. The resulting liquid of ammonia expands in the further heat exchanger (evaporator) where it cools the water from the external circuit by absorbing its heat and then evaporates again. The ammonia is then piped into the absorber where it meets the water which remained after the separation in the generator. Here occurs the absorption, the process which named the cycle of operation of the appliance: the ammonia vapor is absorbed by the water to the initial liquid solution in the generator for the cycle to restart again. 6

7 Absolute Reliability Total safety. Efficiency and reliability today. Efficiency guaranteed for its operational life. Respect of the Environment. The reliability of the High Efficiency Robur absorption units is due to precise technological advantages, based on safety and simplicity. Powered by the heat of the gas combustion (Natural Gas or LPG) for its operation they use water and ammonia in a completely sealed circuit. With Robur There is no compressor, consequently the performance is constant during the life span because there is no mechanical wear. There is no leakage of the refrigerant fluid as it is a mechanically sealed circuit. Only three mechanical parts in motion, therefore minimal possibility of mechanical failure. 7

8 Safety and Efficiency Technical Innovation. Is the basis of the High Efficiency Robur units. Natural Gas or LPG, the clean source of energy for heating and air conditioning. Water and ammonia, natural elements for cooling production. Modular installation, guarantee for operation with increased reliability. High Efficiency. The High Efficiency Robur units require the minimum of heat input (as the simple boiler) to produce chilled water. This result is obtained by using the regeneration of thermal energy inside the operational cycle of the chiller and particularly by increasing the level of the temperature of ammonia absorption cycle. It allows to minimize the operational costs of the installation. Water and ammonia. 2/3 of water and 1/3 of ammonia. The water is the absorption fluid and ammonia the refrigerant. Ammonia diluted into the water is absolutely safe and in comparison with other refrigerants has the following advantages: is not the subject of any international limit regarding the protection of the ozone layer does not provoke the green-house effect it is used in thousands of refrigeration appliances its thermodynamic performances are among the best compared to the other fluids, both natural and synthetic. Operation with extreme external temperatures. 50 The characteristics of the High Efficiency Robur units guarantee the stable operation in extreme external ambient temperatures, for the chiller and for the heater module, therefore it is suitable for most worldwide climates. External temperature Cooling Heating Guaranteed long life Efficiency. The High Efficiency Robur units maintain constant performances over time and do not require any replacement of the refrigerant fluid due to loss during servicing. Various tests done by the European Research Institutes demonstrated how much the efficiency of cooling units is influenced by the leakage of the refrigerants. With High Efficiency Robur units you can avoid all these problems. It's not necessary to over-size the refrigerant capacity because there is no efficiency loss during the operating lifespan. Wide application solutions and easy installing. Thanks to the closed circuit evaporator it is possible to adopt various application solutions. The installation requires only simple connections to the external hydraulic piping, to the gas supply line and to the electric supply 230 V line. 8

9 Quiet Efficiency. A key factor in the design of the High Efficiency units is the hydraulic pump which guaranteed to give optimum performance under any circumstances, at all times. This hydraulic pump is of the piston type and is noted for its reliability and silent operation. The transmission system of double synchronous belts and plastic pulleys with automatic rotation control guarantees the efficient operation without any servicing requirements. Containment of the noise level. Is guaranteed by the absence of a compressor and by an electronically controlled condenser fan, the rotation of which reduces as the function of the external ambient temperature (under 33 C). This further reduces the electric supply consumption. Simplified Ordinary Servicing. Low NOx Emission: only 31 ppm. Thanks to the premixed multigas burner, the NOx emissions are reduced to only 31 ppm. The servicing of the High Efficiency Robur appliances is minimized thanks to the absence of a compressor and to the reduced number of mechanical parts in motion. To further simplify servicing, Robur can supply on request a filtration system for the condenser/absorber coil, which protects the coil of the unit against the dirt. The reliability of the High Efficiency Robur absorption unit, is due to precise technological advances, based on safety and simplicity. 9

10 Our references Wiengas, Vienna Austria Gas company kw 140 (cooling capacity) n 2 RTCF Jihomoravská Plinárenská a.s., Brno Czech Republic Gas company kw 210 (cooling capacity) n 3 RTCF CINECITY, Troyes France Multi cinema kw 280 (cooling capacity) n 16 ACF kw 464 (heating capacity) n 16 AY 119 The Robur s Quality System is certified ISO 9001 from April

11 Grace Church, New York U.S.A. Church kw 262,5 (cooling capacity) n 3 RTCF Holy monastery of Dionysiou, Mount Athos Greece Monastery kw 70 (cooling capacity) n 4 ACF LB version for refrigeration The Grange Oxshott, Surrey England Mansions Houses kw 35 (cooling capacity) Touristic village, S. Pedro de Alcantara Spain Touristic village kw 1365 (cooling capacity) n 78 ACF (LPG) Some of the Robur clients: Alpha office building (Korea), A.R.G.B. (Belgium), Buckingamshire County Council (UK), B.B.C. Gas (Canada), Boys Town (U.S.A.), Brighton City Council (Australia), Brunei Shell Petroleum (Brunei), Canadian embassy (Haiti, Barbados, Santo Domingo), Cantine Marchesi Antinori (Italy), CEGAS (Spain), Clinique Nogent Le Phaye (France), Colnago (Italy), Comit (Italy), COOP (Italy), Ferrovie dello Stato (Italy), Forest Hill Hotel (France), Gas de Caribe (Colombia), Gemco (Spain), Holiday Inn (France), Inca Burger (Spain), India Compressor (India), Yankee Gas Serv. Co. (U.S.A.), Liverpool University (UK), Mac Donald s (Italy), Mercure Hotel (France), Metrogas (Argentina), Oak Hall School (U.S.A.), Operational Area El Cuji (Venezuela), Pala Fenice (Italy), Pauker Nyomda (Hungary), Piberplast (Italy), Poste Italiane (Italy), Probanka (Slovenia), River Drive Appartments (U.S.A.), Royal Shakespeare Theatre (UK), Safilo (Italy), Sarawak Shell Behrard (Malaysia), Sparkasse (Germany), Stadsdrukkerrij (Holland), St. Agathas Church (U.S.A.), University of Connecticut (U.S.A.), VIMAR (Italy), JABAO Gas Equipment Co. (China), Jacuzzi Europe (Italy). 11

12 Elements at the service of High Technology A system controlled by a microprocessor: This operates as a selfdiagnostic device of the unit, it is a printed resin electronic circuit. It displays the chilled water temperature and the numerical error codes, 16 different conditions of operation, including: dirty condenser battery and the loss of relative fan airflow ventilation flow control reduction of the chilled water flow exceeding water temperature setting point exceeding the generator's limit temperature. Electronic digital display control (DDC): MAN VEN. 12:53:36 CK CONDIZIONAMENTO ON IN O C OUT +7.0 O C SET O C T +5.0 O C A single device (already standard on RTCF and RTYF units) to fully manage and control the Robur climate control system. Among the functions: Can control up to 16 machines (single or preassembled) when connected to common chilled water circuit. Programmable timing of cooling and/or heating. Monitors inlet and outlet water temperatures. Sequence control of unites, to ensure equal running hours. Audable and visual alarm for each single unit. Possibility of control on the basis of the outside temperature. Constant display of the system operating parameters. Logs and displays alarm history. Remote alarm signalling and burner lockout. The digital display control unit for the units AYF /4 will control only the cooling module. For the units AYF /2 the extension kit must be provided for managing the heating module. Constructive Characteristics Air conditioning unit. Model ACF 60-00: Air cooled single effect water chiller for outdoor installation. Absorption refrigerant cycle with ammonia-water natural solution, fired by Natural Gas or LPG. The unit is completed with: Refrigerant circuit made of mild steel externally coated with epoxy polyester paint. Pre-mixed gas burner; multiple gas type; stainless steel construction; with ignition and flame sensor device controlled by electronic flame box. Condenser axial fan with electronically controlled speed as the function of the external ambient temperature. Panels are made of galvanized sheet metal, with powder epoxy coating, thermally treated. Safety and control devices comprising: Water flow switch. Safety valve at the refrigerant circuit. Safety by-pass valve at refrigerant circuit, between high and low pressure side. Generator high temperature limit switch with manual reset. Antifreeze thermostat. Differential flue pressure switch on the combustion circuit for the control of the correct evacuation of the combustion products. Double shutter electric gas valve. Electronic control device with self-diagnostic unit. Flue temperature limit switch with an automatic reset: it protects generator from overheating. Constructive Characteristics Air conditioning units. Models RTCF 120, RTCF 180, RTCF 240, RTCF 300: The RTCF units comprise 2, 3, 4 or 5 chillers ACF 60-00, mounted on the steel support frame, already assembled, hydraulically piped and electrically wired. The RTCF units are complete with an electric control box and supplied with a DDC device. The constructive characteristics, and the control safety devices of each module are the same as the basic chiller models. 12

13 GA series Technical Characteristics: Constructive Characteristics of the Heating and Cooling Appliances. Models AYF /2 and /4. AYF model. Models with heating and cooling; the chiller module has the same performance characteristics as the base model. The absorption units complete with the heating module are available in a four pipe version for the simultaneous production of hot and chilled water or in a two pipe version (alternative production). Boiler module: airtight combustion chamber thermally insulated for outdoor installation; high thermal efficiency: 92,9%; pre-mixed multiple-gas burner made of stainless steel with low NOx and CO emissions; vertically positioned; high voltage ignition transformer. Safety and control devices: electronic flame control box for burner ignition control and ionization; double shutter electric gas valve; high limit temperature switch of the generator; 3 bar safety valve for hydronic circuit; hydraulic pressure switch for the water flow rate control; automatic thermal switch with adjustment range of 87± 3 C; antifreeze thermostat; automatic air breathing device. MODEL AYF Module /2/4 AY 119 Chiller Thermal input (burner) kw Cooling capacity (1) kw Chilled water flow rate nominal l/h 2735 Gas consumption natural gas (G20) (2) m 3 /h 2.51 (15 C 1013 mbar) LPG (G30) (3) kg/h 1.86 (4) (5) Sound pressure level - standard version maximum db (A) 57 minimum db (A) 47 - low noise version maximum db (A) 54 minimum. db (A) 47 Heater Thermal input (burner) kw Heating output kw Hot water flow rate nominal l/h Gas consumption natural gas (2) m 3 /h (15 C 1013 mbar) LPG (3) kg/h Electrical Data Voltage 230V - 50 Hz single phase Nominal Chiller W 820 Wattage (6) Heater W Physical Data Weight (when operating) kg Dimensions Lenght mm Width mm Height mm Heating Module AY 119: Outdoor installation without any protection requirements, saving space. Control and safety devices for temperatures down to - 20 C. High thermal efficiency: 92,9%. Very Low NOx emission: only 31 ppm. Vertical flue outlet Ø 130 mm complete with terminal and draught diverter. 13

14 GA series Technical Characteristics: MODEL ACF RTCF RTCF RTCF RTCF Chiller Thermal input (burner) kw Cooling capacity (1) kw Chilled water flow rate nominal l/h Gas consumption natural gas (2) m 3 /h (15 C 1013 mbar) LPG (3) kg/h (4) (5) Sound pressure level - standard version maximum db (A) minimum db (A) low noise version maximum db (A) minimum db (A) Electrical Data Voltage 230V-50 Hz 400V / 230V - 50 Hz Nominal Wattage (6) W Physical Data Weight (when operating) kg Inlet/Outlet water lines F 1 1 / gas line F 3/4 1 1 / / / / 4 Dimensions Length mm Width mm Height mm (1) Specifications to rated conditions: air temperature 35 C outlet water temperature 7.2 C inlet water temperature 12.7 C (2) Low Heat Value MJ/m 3 (9.45 kwh/m 3 ) referred to a 15 C temperature 1013 mbar. (3) Low Heat Value MJ/kg (12.87 kwh/kg) referred to a 15 C temperature 1013 mbar. (4) When the air temperature is less than 33 C there is a reduction of the air fan capacity. (5) Recorded 5 meters far from the unit in a typical installation. (6) ±10% as function of the voltage of electric supply and of absorption tolerance of electric motors. Technical characteristics of the heating module Values Nominal heating output kw 32.5 Thermal efficiency when nominal power used % 92.9 Thermal efficiency when 30% of nominal power used % 92.4 Thermal losses on the flue when burner is on % 6.5 Thermal losses on the flue when burner is off % 0.4 Thermal losses of the generator case % 0.6 Note: All the models are supplied without chilled water circulation pump which must be provided in the installation It is necessary to add to the water the appropriate antifreeze substances in the amount compatible with the lowest external ambient temperatures. Accessories. Robur supplies the following accessories to allow easier application of the High Efficiency units: Anti-vibration damping pads for RTCF and RTYF Regulation thermostats 2/4 stages temperature display Water circulation pump* Filter for the condenser/absorber Fittings for pressure test point with cock Anti vibration flexible hoses for hot and chilled water Water filter DDC device (standard for RTYF and optional for AYF) Expansion vessel kit close type with membrane with 7,5 l capacity. * only for ACF and AYF. 14

15 GA series MODEL Chiller RTYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF / / / / / / / / /2 Thermal input (burner) kw Cooling capacity (1) kw Chilled water flow rate l/h Gas natural gas (2) m 3 /h consumption LPG (3) kg/h Heater Thermal input (burner) kw Heating output kw Hot water flow rate l/h Gas natural gas (2) m 3 /h consumption LPG (3) kg/h Electrical Data Voltage 400V - 50 Hz three phase or 230V - 50 Hz single phase Nominal wattage (6) for chiller W Nominal wattage (6) for heater W Piping and Physical Data Weight (when operating) kg Inlet/Outlet water lines F gas line F 1 1 / / / / / / / / / 2 Dimensions Lenght mm Width mm Height mm Features The GA series chillers models AYF and RTYF have been designed to satisfy the requirement to produce heating energy (hot water) and cooling energy (cold water) with a single pre-assembled unit. The RTYF unit, in particular, comprises ACF and AYF modules assembled on a single steel base frame; electrical and hydraulic connections are made in the factory; this modular system for both heating and cooling uses the capacity required to suit the various seasonal and ambient thermal conditions. Important energy savings for both winter heating and summer cooling. The AYF and RTYF modules do not require any specific plant room, because they are outdoor installed. This permits a more rational use of the internal building areas. The RTYF modules are supplied with a standard Electronic Digital Display Control (DDC), while the module AYF/2 pipes, on request, can be fitted for connection to the optional DDC (this control unit is not suitable for heating module of model AYF/4 pipes). The DDC regulates and controls each single heating and air-conditioning unit and constantly supervises the operating parameters of the modules, and eventual alarms. It is possible, moreover, to set the operating mode (heating or cooling) and timer control of the installation. The DDC controls the start of each single unit and ensures that each module runs the same amount of time. Due to continuous product innovation and development, Robur reserves the right to change product specification without prior notice. 15

16 GA High Efficiency GA Series - TK Version PROCESS APPLICATIONS L I N E PROCESS APPLICATION The GA series TK version water refrigerators are natural gas or LPG absorption units built for specific operation, in heavy duty applications including process chilling, whether for production process directly or continuous space temperature control. The TK units have been designed and built for use in an extremely wide range of operating conditions: - Operational range: ambient air 12 C / +45 C - Minimum outlet water T: +3 C 16 cooling models available from to kw and heating models from 32,5 to 130 kw 4 available versions: basic TK low noise TK-S stainless steel TK-I low noise and stainless steel TK-S-I Coolant load optimized for all-year-round operation. Refrigerant concentrator for greater average efficiency. Hydraulic pump group enlarged to guarantee maximum reliability. Specific microprocessor control parameters. The RTCF and RTYF models are supplied with a DDC-device as standard. (See Accessories page 27). 16

17 GA series-tk version Typical applications: Process applications: where it is necessary to cool moulds, machines, tools and equipment Plastic packaging and small item production Small metal item production Yarn production Local controlled temperature climate control throughout the year, e.g. for constant temperature rooms, computer rooms and laboratories. Constant temperature rooms High technology electronics production Experimental laboratories Air conditioning for areas with high thermal charge, that also need cooling in cold seasons. Some references: In Italy: Piberplast, Voghera (plastic packs) - Steab, Rufina (small plastic items) - Scame Mastaf, Suisio (plastic switches) - Polo Tecnologico, Dalmine (research and development) - Termoplast, Gargallo (plastic materials) - M.P. Stampi, Rovereto (plastic materials production) - Nuova Unicol, Fontanelle (solid glue for furniture). Correction factor: INSTRUCTION FOR USE Amb. temp. Outlet H2O C 3 C 5 C 7 C 9 C TK unit refrigerating correction factor. Amb. temp. Outlet H2O C 3 C 5 C 7 C 9 C The TK units produce cold water down to + 3 C, requiring the addition of a suitable antifreeze will be necessary in these conditions of use, to prevent the water from freezing in case of a reduction of the thermal charge (exclusion of one or more zones, bypass valve cut-in, etc.). The TK unit s refrigeration yield is sensitive to outside temperature, so it is advisable to check the unit s yield in the planned conditions of use to prevent the systems from being over specified. 17

18 GA series-tk version Technical Characteristics: MODEL ACF RTCF RTCF RTCF RTCF TK TK TK TK TK Chiller Thermal input (burner) kw Nominal cooling capacity (1) kw Chilled water flow nominal l/h maximum l/h minimum l/h Internal pressure drop mws bar Gas consumption naturalgas (2) m 3 /h LPG (3) kg/h Sound pressure max. db (A) level (4) (5) min. db (A) version TK-S max. db (A) min. db (A) Electrical Data Voltage 230V-50 Hz 400 V -50 Hz 3 ph. or 230 V - 50 Hz single phase Nominal Wattage (6) kw Piping Data Inlet/Outlet water lines F 1 1/ Gas line F 3/4 1 1/4 1 1/4 1 1/4 1 1/4 Physical Data Weight (when operating) kg Operational range C from -12 to +45 Inlet water temperature regulation C from +3 to +13 Minimum outlet temperature C +3 Antifreeze limit temperature C +2 Dimensions Length mm Width mm Height (7) mm (1) Specifications to rated conditions: air temperature 35 C outlet water temperature 7.2 C inlet water temperature 12.7 C. For conditions other than the rated ones refer to the table Correction factor on page 17. (2) Low Heat Value MJ/m 3 (9,45 kwh/m 3 ) referred a 15 C temperature 1013 mbar. (3) Low Heat Value MJ/kg (12,87 kwh/kg) referred a 15 C temperature 1013 mbar. (4) When the air temperature is less than 33 C there is a reduction of the air fan capacity. This further reduces the electric supply consumption. (5) Recorded 5 metres away from the unit in a typical installation. (6) ±10% as function of the voltage of electric supply and of absorption tolerance of electric motors. (7) The height of the LOW NOISE version of the RTYF unit complete with fan nozzle is 1540 mm. Due to continuos product innovation and development, Robur reserves the right to change product specification without prior notice. 18

19 GA series-tk version MODEL AYF AYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF / / / / / / / / / / /2 TK TK TK TK TK TK TK TK TK TK TK Chiller Thermal input (burner) kw Nominal cooling capacity (1) kw Chilled water nominal l/h flow maximum l/h minimum l/h Internal pressure drop mws cool bar hot Gas natural gas (2) m 3 /h consumption LPG (3) kg/h Sound pressure max. db (A) level (4) (5) min. db (A) version TK-S max. db (A) min. db (A) Heater Thermal input (burner) kw Heating output kw Hot water nominal l/h flow rate minimum l/h Gas natural gas (2) m 3 /h consumption LPG (3) kg/h Electrical Data Voltage 400V - 50 Hz three phase or 230V - 50 Hz single phase Nominal Wattage for chiller (6) kw Nominal Wattage for heater (6) kw Piping Data Inlet/Outlet water lines F 1 1/4 1 1/4 cool hot Gas line F 3/4 3/4 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 Physical data Weight (when operating) kg Dimensions Length mm Width mm Height (7) mm

20 GA High Efficiency GA Series - HT Version TOPICAL ZONE L I N E TROPICAL ZONE The GA series HT version water refrigerators are natural gas or LPG absorption units derived from the standard version and built for specific operation at high ambient air temperatures, i.e. for air conditioning in geographical areas with outside air temperature up to 50 C. The HT units have been designed and built, taking into consideration the specific operating conditions, of their field of use: - Operational range: ambient air 0 C / +50 C - Minimum outlet water T: +5 C 16 cooling models available from 16.9 to 84.5 kw and heating models from 32.5 to 130 kw 2 available versions: basic HT stainless steel HT-I Coolant load optimized for high ambient air temperatures. Refrigerant concentrator for greater average efficiency with high temperatures. Condenser/absorber coil with special fins for increased heat transfer. Hydraulic pump group enlarged to guarantee maximum functionality. Specific microprocessor control parametres. The RTCF and RTYF models are supplied with a DDC-device as standard. (See Accessories page 27). 20

21 GA series-ht version Typical applications: Air conditioning of civil commercial and industrial environments in tropical geographics zone. Service industry Civil Industrial Some references: Sonelgaz, Algiers (Algeria) - Yecta Arvard ind., Teheran (Iran) - Gasco, Cairo (Egypt) - Electro International, Karachi (Pakistan) - Alpha Office Building, Seoul (Korea) - Residential House, Sungnam (Korea) - Sarawak Shell, Berhad Miri Sarawak (Malaysia) - Operational Area Barquisimeto, Estado Lara (Venezuela) - Operational Area Maracaibo, Estado Zulia (Venezuela) - Doral Beach, Puerto la Cruz (Venezuela) - Operational Area Charallave, Dtto. Federal (Venezuela) - Operational Area El Quji, Caracas Dtto. Federal (Venezuela) - Gas del Caribe, Baranquilla (Colombia) Correction factor: INSTRUCTION FOR USE Amb. temp. C Outlet H2O 5 C 7 C 10 C 12,5 C 14 C , , , , HT unit refrigerating correction factor. Amb. temp. C Outlet H2O 5 C 7 C 10 C 12,5 C 14 C , , , , The HT units can produce cold water down to 5 C. However depending on the outside operating temperature, it is recommended to set the adjustment of the delivery temperature in such a way as to ensure that here is not an excessive thermal head between the water in the system and the ambient air. In fact, with outside temperatures above 42 C, heavy dehumidification is not normally necessary, and thus the use of refrigerated water at temperatures below 9 or 7 C. The use of low temperatures, in fact, would compromise the unit s yield without noticeable comfort benefits. 21

22 GA series-ht version Technical Characteristics: MODEL ACF RTCF RTCF RTCF RTCF HT HT HT HT HT Chiller Thermal input (burner) kw Nominal cooling capacity (1) kw Chilled water flow nominal l/h maximum l/h minimum l/h Internal pressure drop mws bar Gas consumption natural gas (2) m 3 /h LPG (3) kg/h Sound pressure max. db (A) level (4) (5) min. db (A) Electrical Data Voltage 230V-50 Hz 400 V -50 Hz 3 ph. or 230 V - 50 Hz single phase Nominal Wattage (6) kw Piping Data Inlet/Outlet water lines F 1 1/ Gas line F 3/4 1 1/4 1 1/4 1 1/4 1 1/4 Physical Data Weight (when operating) kg Operational range C from 0 to + 50 Inlet water temperature regulation C from +5 to +15 Minimum outlet temperature C +5 Antifreeze limit temperature C +2 Dimensions Length mm Width mm Height (7) mm (1) Specifications to rated conditions: air temperature 35 C outlet water temperature 7.2 C inlet water temperature 12.7 C. For conditions other than the rated ones refer to the table Correction factor on page 21. (2) Low Heath Value MJ/m 3 (9,45 kwh/m 3 ) referred a 15 C temperature 1013 mbar (3) Low Heath Value MJ/kg (12,87 kwh/kg) referred a 15 C temperature 1013 mbar (4) When the air temperature is less than 33 C there is a reduction of the air fan capacity. This further reduces the electric supply consumption. (5) Recorded 5 metres away from the unit in a typical installation (semi-reflecting plane). (6) ±10% as function of the voltage of electric supply and of absorption tolerance of electric motors. (7) The height of the LOW NOISE version of the RTYF unit complete with fan nozzle is 1540 mm. Due to continuos product innovation and development, Robur reserves the right to change product specification without prior notice. 22

23 GA series-ht version MODEL AYF AYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF RTYF / / / / / / / / / / /2 HT HT HT HT HT HT HT HT HT HT HT Chiller Thermal input burner kw Nominal cooling capacity (1) kw Chilled water nominal l/h flow maximum l/h minimum l/h Internal pressure drop mws cool bar hot Gas natural gas (2) m 3 /h consumption LPG (3) kg/h Sound pressure max. db (A) level (4) (5) min. db (A) Heater Thermal input (burner) kw Heating output kw Hot water nominal l/h flow rate minimum l/h Gas natural gas (2) m 3 /h consumption LPG (3) kg/h Electrical Data Voltage 400V - 50 Hz three phase or 230V - 50 Hz single phase Nominal wattage for chillers (6) kw Nominal wattage for heater (6)) kw Piping Data Inlet/Outlet water lines F 1 1/4 1 1/4 cold m hot Gas line F 3/4 3/4 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 Physical data Weight (when operating) kg Dimensions Length mm Width mm Height (7) mm

24 GA High Efficiency GA Series - LB Version REFRIGERATION L I N E REFRIGERATION The GA series LB version water refrigerators are natural gas or LPG absorption units built for specific refrigeration applications, i.e. for the production of low temperature fluid suitable for foodstuff conservation plants, cooling foodstuff laboratories and refrigerator cells for processing foodstuffs, for which very low space temperatures are required. Their operation is therefore likely for 12 months a year. The units LB have been designed and built, taking into consideration the specific operating conditions of their field of use: - Operational range: ambient air -12 C / +45 C - Minimum outlet water T: -10 C - Nominal single power 12.8 kw, outlet fluid T - 5 C 5 cooling models available from 12.8 to 64 kw 4 available versions: basic LB low noise LB-S stainless steel LB-I low noise and in stainless steel LB-S-I Coolant load optimized. Refrigerant concentrator for greater average efficiency. Hydraulic pump group enlarged to guarantee maximum functionality. Specific microprocessor control parameters. The RTCF models are supplied with a DDC-device as standard. (See Accessories page 27). 24

25 GA series-lb version Typical applications: Chilling low-temperature environments for foodstuff processing: where inside temperatures complying with hygienic-sanitary regulations must be maintained. Meat processing Dairies Mushroom production Chilling foodstuff conservation cells and supermarket conservation counters. Cooling of processes that require below zero liquid temperatures. Cheese seasoning Storing medicines Processing and conserving fruit and vegetable Ice storage systems, for accumulating energy in periods of low thermal charge. Wine production Scent production Spaghetti and biscuit production Some references: Caseificio Reginella d Abruzzo, Sulmona (Italy) - Gerini Carne e Salumi, Pontassieve (Italy)- L Italiana Aromi, Carate Brianza (Italy) - Foodstuff conservation cells of the St. Dionysiou Monastery, Mount Athos (Greece). Correction factor: INSTRUCTION FOR USE Amb. Outlet H2O temp. C -10 C -7 C -5 C -2 C LB unit refrigerating correction factor. Amb. Outlet H2O temp. C -10 C -7 C -5 C -2 C , , The LB units can produce iced fluid down to -10 C, so it is essential to use suitable antifreeze fluid in the circuit, to prevent the water from freezing. Should the refrigerated fluid in the system be able to come into contact with foodstuffs, even accidentally, a non-toxic antifreeze fluid(e.g. propyl glycol) must be used. The unit s refrigeration LB yield refers to an exchange fluid with antifreeze already added (40%), and thus takes account of the refrigertion yield exchange losses at the unit s evaporator. This yield correction must also be made for calculating the terminal units (AHU and fan-coils). Units LB are sensitive outside temperature, so it advisable to check the unit s yield in the planned conditions of use, to prevent the systems from being overspecified. 25

26 GA series-lb version Technical Characteristics. MODEL ACF RTCF RTCF RTCF RTCF LB LB LB LB LB Chiller Thermal input (burner) kw Nominal cooling capacity (1) kw Chilled water flow nominal l/h maximum l/h minimum l/h Internal pressure drop mws 5, bar Gas consumption naturalgas (2) m 3 /h L.P.G. (3) kg/h Sound pressure max. db (A) level (4) (5) min. db (A) version LB-S max. db (A) min. db (A) Electrical data Voltage 230V-50 Hz 400 V -50 Hz 3 ph. or 230 V - 50 Hz single phase Nominal Wattge (6) kw Piping data Inlet/Outlet water lines F 1 1/ Gas line F 3/4 1 1/4 1 1/4 1 1/4 1 1/4 Physical data Weight (when operating) kg Operational range C from -12 to + 45 Inlet water temperature regulation C from - 10 to 0 Minimum delivery temperature C - 10 Antifreeze limit temperature C - 12 Dimensions Lenght mm Width mm Height (7) mm (1) Specifications to rated conditions: air temperatur 35 C - inlet water temperature -5 C with 40% glycol - outlet water temperature 0 C For conditions other than the rated ones refer to the table Correction factor on page 25. (2) Low Heat Value MJ/m 3 (9,45 kwh/m 3 ) referred a 15 C temperature 1013 mbar (3) Low Heat Value MJ/kg (12,87 kwh/kg) referred a 15 C temperature 1013 mbar (4) When the air temperature is less than 33 C there is a reduction of the air fan capacity. This further reduces the electric supply consumption. (5) Recorded 5 metres away from the unit in a typical installation. (6) ±10% as function of the voltage of electric supply and of absorption tolerance of electric motors. Due to continuos product innovation and development, Robur reserves the right to change product specification without prior notice. 26

27 MAN VEN. 12:53:36 CK CONDIZIONAMENTO ON IN O C OUT +7.0 O C SET O C T +5.0 O C MAN VEN. 12:53:36 CK CONDIZIONAMENTO ON IN O C OUT +7.0 O C SET O C T +5.0 O C MAN VEN. 12:53:36 CK CONDIZIONAMENTO ON IN O C OUT +7.0 O C SET O C T +5.0 O C Accessories. Electronic Digital Display Control (DDC) A single device (already standard on RTCF and RTYF units) to fully control and monitor Robur air conditioning systems. MAN VEN. 12:53:36 CK CONDIZIONAMENTO ON IN O C OUT +7.0 O C SET O C T +5.0 O C FEATURES: Can control up to 16 machines (single or preassembled) when connected to common chilled water circuit Programmable timing of cooling and/or heating. Monitors inlet and outlet water temperatures. The Digital Display Control device for the units AYF /4 will only control the cooling module. The extension kit must also be provided for the units AYF /2 for managing the heating module. Sequence control of machines to ensure equal running hours. Suitable for connection with BMS to allow chiller enable interface. Visual and audible alarm of each single unit. Possibility of control on the basis of the outside temperature. Constant display of the system operating parameterst. Logs and displays alarm history. Remote alarm signalling and burner lockout. Wiring diagrams RTCF RTYF AYF /2 ACF (system extensions) RTCF ACF Electric water pump for system Couplings with pressure socket Antivibration joints (hoses) Impurities filter trap for water Adjustment thermostats with 2 and 4 steps Coil filter kit Anti-vibration damping pads 27

28 ROBUR PRODUCES: M I S S I O N Split system for cooling in summer and heating in winter. Ideal for industrial and commercial factory. Gas fired unit heaters to heat commerial and industrial areas. Robur is dedicated to dynamic progression in research, development and promotion of safe, environmentally-friendly, and energy-efficient products, through the commitment and caring of our employees and partners. Combi gas heating system. This two-piece heater provides rapid solutions to countless heating requirements. Forced draught gas-fired unit heaters perfect for small rooms. Air barriers to decreases heat loss due to frequent opening of the industrial doors. Distributor: Dealer: ROBUR spa Via Parigi 4/ Verdellino/Zingonia (Bergamo), Italy Tel Fax robur@robur.it CERTIFIED VISION 2000 maggio 2001 QUALITY SYSTEM ENVIRONMENT-FRIENDLY AWARENESS Codice: XDPL140-10/2002