Inverter air to water heat pumps

Transcription

1 Product Manual 504 B 07/07 A EN Date: July 2007 Supersedes: none Inverter air to water heat pumps McEnergy HPI Cooling capacity from 249 to 385 kw Heating capacity from 274 to 412 kw Refrigerant: R-134a McQuay is participating in the Eurovent Certification Programme. Product are as listed in the Eurovent Directory of Certified Products and on the web site com

2 McEnergy Inverter air to water heat pump McEnergy is the solution for the most stringent requirements of comfort cooling, heating, ice storage and process applications, in 249kW 385kW range for cooling and 274kW 412kW range for heating. It has been designed for minimising energy cost and maximising capacity. Inverter driven on McQuay Frame3100 single screw compressor allows matching the thermal demand even above the rated values (from 15,5% of nominal load to boost capacity). Rating tables include both nominal and boost capacity values. Lower noise higher flexibility The compressor allows a constant gas flow. This compression process eliminates completely gas pulsations. The extremely low noise compressor performance allows the use of McEnergy HPI for all applications. The quiet operation eliminates noise transmission through the structure and the water piping system. Code requirements The heat pump has been designed and is manufactured in accordance with following European Directives that are equivalent to American Air-Conditioning Industry codes: Chiller rating EN Pressure vessel approval PED Electrical Codes IEC CEI 44-5 Elect. & Safety Codes Machine Safety, Electrical Codes CEI EN Machinery Directive 98 / 37 / EC as modified Electromagnetic Compatibility Directive 89 / 336 / EEC as modified Low-voltage Directive 73 / 23 / EEC as modified Manufacturing Quality Standard ISO 9001:2000 Infinitely variable capacity control Capacity control is infinitely variable. This modulation allows matching exactly the building load. The result is energy cost decrease, mainly at part-load conditions, where the unit runs most of the time. Furthermore, with the infinitely variable capacity control, in some cases the inertial tank could be not requested for the water circuit. 2 versions ST Standard version LN Low noise 80,3 80,0 dba 76,3 73,7 dba ST Condenser fans rotating at 890 rpm. LN Condenser fans rotating at 705 rpm in cooling mode and 890 rpm in heating mode; compressors and evaporator sound proof cabinet. Compressors serviceability Inspection covers allows visual inspection of the main screw and the gate-rotor even on side. Reliability Each unit is pressure tested, evacuated and charged with refrigerant. It is then tested at the factory s test bench. For each safety and operating control is verified the correct setting and operation. General characteristics Cabinet and structure The cabinet is made of galvanized steel sheet and painted to provide a high resistance to corrosion. The base frame has rings for lifting the unit with ropes for an easy installation. The weight is uniformly distributed along the profiles of the base and this facilitates the arrangement of the unit. 504 B 07/05 A EN pag 2/48

3 Screw compressors with integrated oil separator The compressors are semi-hermetic, single-screw type with gate-rotor (made of carbon impregnated engineered composite material). Each compressor has one inverter managed by the unit microprocessor for infinitely modulating the capacity. An integrated high efficiency oil separator maximises the oil separation. Start is inverter type. Ecological HFC 134a refrigerant The compressors have been designed to operate with R-134a, ecological refrigerant with zero ODP (Ozone Depletion Potential) and very low GWP (Global Warming Potential) that means low TEWI (Total Equivalent Warming Impact). Evaporator The evaporator is shell and tubes, direct expansion, with refrigerant inside the tubes and water outside. The evaporator has 2 refrigerant circuits. An electrical heater prevents freezing down to -28 C ambient temperature. 10mm closed cell insulation material covers the evaporator. Vessel approval is according to PED. Condenser coils McEnergy HPI units are manufactured with internally enhanced seamless copper tubes arranged in a staggered row pattern and mechanically expanded into McQuay lanced and rippled aluminium condenser fins with full fin collars. An integral sub-cooler circuit provides sub-cooling to effectively eliminate liquid flashing and increase in cooling capacity without increasing the power input. Condenser coil fans The condenser fans are helical type with wing-profile blades for achieving better performance. Each fan is protected by a guard. The motors are IP54. Fans thermal relays are supplied as standard. Electronic expansion valve McEnergy HPI is equipped with advanced electronic expansion valves for precise control of refrigerant mass flow. McEnergy HPI electronic expansion valve proposes features that makes it unique: short opening and closing time, high resolution, positive shut-off function to eliminate use of additional solenoid valve, highly linear flow capacity, continous modulation of mass flow without stress in the refrigerant circuit and corrosion resistance stainless steel body. Electrical control panel Power and control are located in two sections of the main panel that is manufactured to ensure protection against all weather conditions. The power panel is fitted with an interlocked door main isolator to prevent access while power supply is on. Electrical panel is IP54. The power section includes compressors inverters, fans contactors, fans thermal relays and control circuit transformer. Intelligent Compressor Start Mode Control software includes an intelligent compressor start mode that unloads the first compressor to 75% during the start of the second one, in order to reduce inrush current. Certifications Every unit is designed, manufactured, tested according to CE mark (89/392). Quality management system is in compliance with UNI - EN ISO 9001:2000 standards. Water content in cooling circuits The cooled water distribution circuits should have minimum water content to avoid excessive compressors start and stop. In fact, each time the compressor starts up, an excessive quantity of oil goes from the compressor sump and simultaneously there is a rise in the temperature of the compressor motor s stator due to the inrush current during the start-up. To prevent damage to the compressors, McQuay has envisaged the application of a device to limit frequent stops and restarts. During the span of one hour there will be no more than 6 starts of the compressor. The plant side should therefore ensure that the overall water content allows a more constant functioning of the unit and consequently greater 504 B 07/05 A EN pag 3/48

4 environmental comfort. The minimum water content per unit should be calculated with a certain approximation using this simplified formula: (1) Q = 35,83 X P (kw) T( C) where: Q = minimum water content per unit expressed in litres P = minimum cooling capacity of the unit expressed in kw T = evaporator entering / leaving water temperature difference expressed in C For more accurate determination of quantity of water, it is advisable to contact the designer of the plant. MicroTech II C Plus controller MicroTech II C Plus controller is installed as standard; it can be used to modify unit set-points and check control parameters. A built-in display shows machine's operating status, programmable values, set-points, like temperatures and pressures of water, refrigerant and air. Device controls maximise the chiller energy efficiency and the reliability. A sophisticated software with predictive logic, select the most energy efficient combination of compressors, EEXV and condenser fans to keep stable operating conditions and maximise energy efficiency. The compressors are automatically rotated to ensure equal operating hours. MicroTech II C Plus protects critical components in response to external signals from its system sensors measuring: motor temperatures, refrigerant gas and oil pressures, correct phase sequence and evaporator. Control section - main features Management of the compressor capacity slide and fans modulation. Chillers enabled to work in partial failure condition. Full routine operation at condition of: - high ambient temperature value, - high thermal load, - high evaporator entering water temperature (start-up). Display of evaporator entering/leaving water temperature. Display of condensing-evaporating temperature and pressure, suction and discharge superheat for each circuit. Leaving water cooled temperature regulation. Temperature tolerance = 0,1 C. Compressors and evaporator/condenser pumps hours counter. Display of Status Safety Devices. Start up numbers and compressors working hours equalization. Optimized management of compressors load. Fans management according to condensing pressure. Automatic re-start in case of power supply interruption (adjustable). Soft Load. Start at high evaporator water temperature. Return Reset. AOT Reset (optional). Set point Reset (optional). Safety for each refrigerant circuit High pressure (pressure switch). Low pressure (pressure switch). Condensation fan Magneto-thermal. High Discharge Temperature on the compressor. Phase Monitor. Low pressure ratio. High oil pressure drop. Low oil pressure. 504 B 07/05 A EN pag 4/48

5 System security Phase monitor. Freeze protection. Regulation type Proportional + integral + derivative regulation on the leaving water evaporator output probe. Condensation The condensation can be carried out according to temperature or pressure or pressure ratio. The fans can be managed according to ON/OFF mode or to a 0/10 V modulating signal or both (speedtrol). MicroTech II C Plus terminal MicroTech II C Plus built-in terminal has the following features. 4-lines by 20-character liquid crystal display back lighting. Key-pad consisting of 6 keys. Memory to protect the data. General faults alarm relays. Password access to modify the setting. Service report displaying all running hours and general conditions. Alarm history memory to allow an easy fault analysis. PlantVisor TM : Solution for tele-maintenance and supervisory MicroTech II C Plus can be monitored locally or via modem or GSM by PlantVisor TM supervision program. PlantVisorTM is compatible with Windows NT, 2000, XP. It is based on 16 bit WEB technology. It allows the followings functions. Unit status monitoring. Circuits status monitoring. Set-points modification. Alarms display. MicroTech II C Plus remote control MicroTech II C Plus is able to communicate to BMS (Building Management System) if the protocol is one of the following. CAREL. Modbus. LonWorks. BacNet point to point. Standard accessories (supplied on basic unit) Inverter starter For low inrush current and reduced starting torque. Double set-point Dual leaving water temperature set-points. Ambient outside temperature sensor and set-point reset. Soft Load. Fans thermal overload relays - Safety devices against fan motor overloading in addition to the normal protection envisaged by the electrical windings. Phase monitor The phase monitor controls that phases sequence is correct and controls phase loss. Evaporator electric heater Electric heater controlled by a thermostat to protect the evaporator from freezing down to -28 C ambient temperature, providing the power supply is on. Victaulic evaporator water connection Hydraulic joint with gasket for an easy and quick water connection. 504 B 07/05 A EN pag 5/48

6 Electronic Expansion Valve. Victaulic water connections. General fault relay Contactor for alarm warning. Discharge line shut off valves Installed on the discharge port of the compressor. Suction line shut off valve Suction shut-off valve installed on the suction port of the compressor to facilitate maintenance operation. Hour run meter. Low pressure manometers. Options (on request) Partial heat recovery Produced with plate to plate heat exchangers installed between the compressor discharge and the condenser coil. These allow hot water to be produced up to a maximum temperature of 55 C. Brine version Set-point can go down to -8 C. Fan speed control device This device allows the continuous variation of the fan speed, modifying the air flow according to the external temperature conditions. It allows the unit working with air temperature down to 10 C. Fan Silent Mode - The microprocessor clock switches the fan at low speed according to the client setting (i.e. Night & Day), providing that the ambient temperature/condensing pressure is allowing the speed change. It allows a perfect condensing control down to 10 C. Cu-Cu condensing coils - To give better protection against corrosion by aggressive environments. Cu-Cu-Sn condensing coils - To give better protection against corrosion in aggressive environments and by salty air. Alucoat condensing coils - Fins are protected by a special acrylic paint with a high resistance to corrosion. 20mm insulation on evaporator. Flow switch - Supplied separately to be wired and installed on the evaporator water piping (by the customer). High pressure manometers. Set-point reset and demand limit. Spreader bars - Facilitate the lifting of the units keeping the ropes away from the unit's casing. Under/Over Voltage This device control the voltage value and stop the chiller when this exceeds limits set by customer. Alarm from external device Microprocessor is able to receive an alarm signal from an external device (pump etc ). User can decide if this alarm signal will stop or not the unit. Rubber type antivibration mounts - Supplied separately, these are positioned under the base of the unit during installation. Ideal to reduce the vibrations when the unit is floor mounted. Spring type antivibration mounts - Supplied separately, these are positioned under the base of the unit during installation. Ideal for dampening vibrations for installation on roofs and metallic structures. Witness tests - Every unit is always tested at the test bench prior to the shipment. On request, a second test can be carried out, at customer s presence, in accordance with the procedures indicated on the test form. (Not available for units with glycol mixtures). Kit container. Water circulation pump (low or high lifting) Not available for LN units. Hydronic kit consists of: one centrifugal pump direct driven, expansion tank, water feed circuit with pressure gauge, safety valve. The pump motor is protected by a circuit breaker installed in control panel. The kit is assembled and wired to the control panel. Two water circulation pumps (low or high lifting) Not available for LN units. Hydronic kit consists of: two centrifugal pumps direct driven, expansion tank, water feed circuit with pressure gauge, safety valve. The pumps motors are protected by circuit breakers installed in control panel. The kit is assembled and wired to the control panel. Inertial tank with cabinet ( 500 l or 1000 l ) Piping to unit are not included and electric heater power supply has to be provided from external source. 504 B 07/05 A EN pag 6/48

7 Installation notes Handling Care should be taken to avoid rough handling or shock due to dropping the unit. Do not push or pull the unit from anything other than the base, and block the pushing vehicle away from the unit to prevent damage to the cabinet. Never allow the unit fall during unloading or moving as this may result in serious damage. To lift the unit, rings are provided in the base of the unit. Spreader bar and cables should be arranged to prevent damage to the condenser coil or unit cabinet. Location McEnergy HPI units are produced for outside installation on roofs, floors or below ground level on condition that the area is free from obstacles for the passage of the condenser air. The unit should be positioned on solid foundations and perfectly level; in the case of installation on roofs or floors, it may be advisable to arrange the use of suitable weight distribution beams. When the units are installed on the ground, a concrete base at least 250 mm wider and longer than the unit s footprint should be laid. Furthermore, this base should withstand the unit weight mentioned in the technical data table. Space requirements McEnergy HPI units are air-cooled, hence it is important to observe the minimum distances which guarantee the best ventilation of the condenser coils. Limitations of space reducing the air flow could cause significant reductions in cooling capacity and an increase in electricity consumption. To determinate unit placement, careful consideration must be given to assure a sufficient air flow across the condenser heat transfer surface. Two conditions must be avoided to achieve the best performance: warm air recirculation and coil starvation. Both these conditions cause an increase of condensing pressures that results in reductions in unit efficiency and capacity. McEnergy HPI performance is less affected in poor air flow situations because of its special condensing coil geometry. Moreover McQuay unique microprocessor has the ability to calculate the operating environment of the heat pump and the capacity to optimize its performance staying on-line during abnormal conditions. Each side of the unit must be accessible after installation for periodic service. Fig.1 shows you minimum recommended clearance requirements. Vertical condenser air discharge must be unobstructed because the unit would have its capacity and efficiency significantly reduced. If the units are positioned in places surrounded by walls or obstacles of the same height as the units, the units should be at least 2500 mm from obstacles (fig.2). In the event the obstacles are higher than the units, the units should be at least 3000 mm from the obstacle (fig.4). Units installed closer than the minimum recommended distance to a wall or other vertical riser may experience a combination of coil starvation and warm air recirculation, thus causing reduction in unit capacity and efficiency reductions. Once again, the microprocessor will allow the chiller to stay on line, producing the maximum available capacity, even at less than recommended lateral clearances. When two or more units are positioned side by side it is recommended that the condenser coils are at least 3600 mm distance from one another (fig.3); strong wind could be the cause of air warm recirculation. For other installation solutions, consult McQuay technicians. 504 B 07/05 A EN pag 7/48

8 Acoustic protection When noise level must meet special requirements, it is necessary to pay the maximum attention to ensure the perfect insulation of the unit from the support base by applying appropriate vibration-dampening devices on the unit, on the water pipes and on the electrical connections. Storing The environment conditions have to be in the following limits: Minimum ambient temperature : -20 C Maximum ambient temperature : +57 C Maximum R.H. : 95% not condensing Operating limits McEnergy HPI Max evaporator T C 8 Min evaporator T C 4 Envelope for cooling - McEnergy HPI ST/LN 50 Outside Ambient Temperature ( C) Glycol Fans speed control Leaving water temperature ( C) Envelope for heating - McEnergy HPI ST/LN 25 Outside Ambient Temperature ( C) Leaving water temperature ( C) 504 B 07/05 A EN pag 8/48

9 Table 1 Evaporator fouling factors Fouling factors m 2 C / kw Cooling capacity correction factor Power input correction factor COP correction factor 0,0176 1,000 1,000 1,000 0,0440 0,978 0,986 0,992 0,0880 0,957 0,974 0,983 0,1320 0,938 0,962 0,975 Table 2 Altitude correction factors Elevation above sea level (m) Barometric pressure (mbar) Cooling cap. correction factor 1,000 0,993 0,986 0,979 0,973 0,967 0,960 Power input correction factor 1,000 1,005 1,009 1,015 1,021 1,026 1,031 Table 3 Ethylene glycol and low ambient temperature correction factors Air ambient temperature C % of ethylene glycol by weight Cooling capacity correction factor 0,991 0,982 0,972 0,961 0,946 Power input correction factor 0,996 0,992 0,986 0,976 0,966 Flow rate correction factor 1,013 1,040 1,074 1,121 1,178 Water pressure drops correction factor 1,070 1,129 1,181 1,263 1,308 Table 4 Low temperature operation performance factors Ethylene glycol/water leaving temperature C Cooling capacity correction factor 0,842 0,785 0,725 0,670 0,613 0,562 Power input compressors correction factor 0,95 0,94 0,92 0,89 0,87 0,84 Min. % of ethylene glycol Low temperature operation performance factors must be applied to the nominal performance data to have the adjusted value (12/7 C, design ambient temperature). Nomenclature Air cooled screw chiller McEnergy HPI ST 134 HPI Heat Pump Inverter Unit size 2 N. of compressors ST LN Standard version Low noise version 134 Refrigerant HFC 134a 504 B 07/05 A EN pag 9/48

10 Specifications TECHNICAL SPECIFICATIONS McEnergy HPI ST Capacity Cooling kw Heating kw Capacity control Type Stepless Minimum capacity % 15,5 15,5 15,5 15,5 Unit power input Cooling kw 89,8 99, Heating kw 89,5 99, EER 2,84 2,77 2,76 2,77 COP 3,06 3,09 3,06 2,91 ESEER 4,12 4,08 3,99 3,98 Casing Colour RAL7032 Material Galvanized and painted steel sheet Height mm Dimensions Unit Width mm Depth mm Weight Unit kg Operating Weight kg Type Shell and tube Water volume l Nominal water Cooling l/min Water heat flow rate Heating l/min exchanger Nominal Water Cooling kpa pressure drop Heating kpa Insulation material Closed cell foam elastomer Air heat exchanger Type Louvred fins Grooved tubes Type Axial Drive Direct drive Diameter mm Nominal air flow m³/min Fan Quantity Speed in cooling rpm Model Motor output in cool. W Speed in heating rpm Motor output in heat. W Type Semi-hermet. single screw compr. Compressor Oil charge l Quantity Sound level Sound Power Cooling dba 99,5 99,5 99,5 100,4 Heating dba 99,5 99,5 99,5 100,4 Sound Pressure Cooling dba 80,0 80,0 80,0 80,3 Heating dba 80,0 80,0 80,0 80,3 Refrigerant type R-134a R-134a R-134a R-134a Refrigerant circuit Refrigerant charge kg N. of circuits Piping connections Evaporator water inlet/outlet Safety devices High pressure (pressure switch) Safety devices Low pressure (pressure switch) Safety devices Condensation fan magneto-thermal Safety devices High discharge temperature on the compressor Safety devices Phase monitor Safety devices Low pressure ratio Safety devices High oil pressure drop Safety devices Low oil pressure Cooling capacity, unit power input in cooling and EER are based on the following conditions: Notes evaporator 12 C/7 C; ambient 35 C. Heating capacity, unit power input in heating and COP are based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. 504 B 07/05 A EN pag 10/48

11 ELECTRICAL SPECIFICATIONS McEnergy HPI ST Phase 3~ 3~ 3~ 3~ Frequency Hz Power Supply Voltage V Voltage Tolerance Minimum % -10% -10% -10% -10% Maximum % +10% +10% +10% +10% Maximum starting current A Nominal running current cooling A Unit Nominal running current heating A Maximum running current A Maximum current for wires sizing A Fans Nominal running current in cooling A 19,8 19,8 19,8 26,4 Nominal running current in heating A 19,8 19,8 19,8 26,4 Phase 3~ 3~ 3~ 3~ Voltage V Compressor Voltage Tolerance Minimum % -10% -10% -10% -10% Maximum % +10% +10% +10% +10% Maximum running current A Starting method Inverter Allowed voltage tolerance ± 10%. Voltage unbalance between phases must be within ± 3%. Nominal current in cooling mode is referred to installation with 25kA short circuit current and is based on the following conditions: evaporator 12 C/7 C; ambient 35 C. Notes Nominal current in heating mode is referred to installation with 25kA short circuit current and is based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. Maximum starting current: starting current of biggest compressor + 75% of maximum current of the other compressor + fans current for the circuit at 75%. Maximum current for wires sizing: (compressors full load ampere + fans current) x 1, B 07/05 A EN pag 11/48

12 TECHNICAL SPECIFICATIONS McEnergy HPI ST Capacity Cooling kw Heating kw Capacity control Type Stepless Minimum capacity % 15,5 15,5 15,5 Unit power input Cooling kw Heating kw EER 2,79 2,79 2,71 COP 2,93 3,03 2,96 ESEER 4,00 4,08 3,81 Casing Colour RAL7032 Material Galvaniz. and painted steel sheet Height mm Dimensions Unit Width mm Depth mm Weight Unit kg Operating Weight kg Type Shell and tube Water volume l Nominal water Cooling l/min Water heat flow rate Heating l/min exchanger Nominal Water Cooling kpa pressure drop Heating kpa Insulation material Closed cell foam elastomer Air heat exchanger Type Louvred fins Grooved tubes Type Axial Drive Direct drive Diameter mm Nominal air flow m³/min Fan Quantity Speed in cooling rpm Model Motor output in cool. W Speed in heating rpm Motor output in heat. W Type Semi-hermet. single screw compr. Compressor Oil charge l Quantity Sound level Sound Power Cooling dba 100,4 100,4 100,4 Heating dba 100,4 100,4 100,4 Sound Pressure Cooling dba 80,3 80,3 80,3 Heating dba 80,3 80,3 80,3 Refrigerant type R-134a R-134a R-134a Refrigerant circuit Refrigerant charge kg N. of circuits Piping connections Evaporator water inlet/outlet Safety devices High pressure (pressure switch) Safety devices Low pressure (pressure switch) Safety devices Condensation fan magneto-thermal Safety devices High discharge temperature on the compressor Safety devices Phase monitor Safety devices Low pressure ratio Safety devices High oil pressure drop Safety devices Low oil pressure Cooling capacity, unit power input in cooling and EER are based on the following Notes conditions: evaporator 12 C/7 C; ambient 35 C. Heating capacity, unit power input in heating and COP are based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. 504 B 07/05 A EN pag 12/48

13 ELECTRICAL SPECIFICATIONS McEnergy HPI ST Phase 3~ 3~ 3~ Frequency Hz Power Supply Voltage V Voltage Tolerance Minimum % -10% -10% -10% Maximum % +10% +10% +10% Maximum starting current A Nominal running current cooling A Unit Nominal running current heating A Maximum running current A Maximum current for wires sizing A Fans Nominal running current in cooling A 26,4 26,4 26,4 Nominal running current in heating A 26,4 26,4 26,4 Phase 3~ 3~ 3~ Voltage V Compressor Voltage Tolerance Minimum % -10% -10% -10% Maximum % +10% +10% +10% Maximum running current A Starting method Inverter Allowed voltage tolerance ± 10%. Voltage unbalance between phases must be within ± 3%. Nominal current in cooling mode is referred to installation with 25kA short circuit current and is based on the following conditions: evaporator 12 C/7 C; ambient 35 C. Notes Nominal current in heating mode is referred to installation with 25kA short circuit current and is based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. Maximum starting current: starting current of biggest compressor + 75% of maximum current of the other compressor + fans current for the circuit at 75%. Maximum current for wires sizing: (compressors full load ampere + fans current) x 1, B 07/05 A EN pag 13/48

14 TECHNICAL SPECIFICATIONS McEnergy HPI LN Capacity Cooling kw Heating kw Capacity control Type Stepless Minimum capacity % 15,5 15,5 15,5 15,5 Unit power input Cooling kw 88,6 99, Heating kw 89,5 99, EER 2,81 2,69 2,60 2,72 COP 3,06 3,09 3,06 2,91 ESEER 4,06 4,05 3,99 3,93 Casing Colour RAL7032 Material Galvanized and painted steel sheet Height mm Dimensions Unit Width mm Depth mm Weight Unit kg Operating Weight kg Type Shell and tube Water volume l Nominal water Cooling l/min Water heat flow rate Heating l/min exchanger Nominal Water Cooling kpa pressure drop Heating kpa Insulation material Closed cell foam elastomer Air heat exchanger Type Louvred fins Grooved tubes Type Axial Drive Direct drive Diameter mm Nominal air flow m³/min Fan Quantity Speed in cooling rpm Model Motor output in cool. W Speed in heating rpm Motor output in heat. W Type Semi-hermet. single screw compr. Compressor Oil charge l Quantity Sound level Sound Power Cooling dba 93,2 93,2 93,2 94,2 Heating dba 95,6 95,6 95,6 96,4 Sound Pressure Cooling dba 73,7 73,7 73,7 74,1 Heating dba 76,1 76,1 76,1 76,3 Refrigerant type R-134a R-134a R-134a R-134a Refrigerant circuit Refrigerant charge kg N. of circuits Piping connections Evaporator water inlet/outlet Safety devices High pressure (pressure switch) Safety devices Low pressure (pressure switch) Safety devices Condensation fan magneto-thermal Safety devices High discharge temperature on the compressor Safety devices Phase monitor Safety devices Low pressure ratio Safety devices High oil pressure drop Safety devices Low oil pressure Cooling capacity, unit power input in cooling and EER are based on the following conditions: Notes evaporator 12 C/7 C; ambient 35 C. Heating capacity, unit power input in heating and COP are based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. 504 B 07/05 A EN pag 14/48

15 ELECTRICAL SPECIFICATIONS McEnergy HPI LN Phase 3~ 3~ 3~ 3~ Frequency Hz Power Supply Voltage V Voltage Tolerance Minimum % -10% -10% -10% -10% Maximum % +10% +10% +10% +10% Maximum starting current A Nominal running current cooling A Unit Nominal running current heating A Maximum running current A Maximum current for wires sizing A Fans Nominal running current in cooling A 16,2 16,2 16,2 21,6 Nominal running current in heating A 19,8 19,8 19,8 26,4 Phase 3~ 3~ 3~ 3~ Voltage V Compressor Voltage Tolerance Minimum % -10% -10% -10% -10% Maximum % +10% +10% +10% +10% Maximum running current A Starting method Inverter Allowed voltage tolerance ± 10%. Voltage unbalance between phases must be within ± 3%. Nominal current in cooling mode is referred to installation with 25kA short circuit current and is based on the following conditions: evaporator 12 C/7 C; ambient 35 C. Notes Nominal current in heating mode is referred to installation with 25kA short circuit current and is based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. Maximum starting current: starting current of biggest compressor + 75% of maximum current of the other compressor + fans current for the circuit at 75%. Maximum current for wires sizing: (compressors full load ampere + fans current) x 1, B 07/05 A EN pag 15/48

16 TECHNICAL SPECIFICATIONS McEnergy HPI LN Capacity Cooling kw Heating kw Capacity control Type Stepless Minimum capacity % 15,5 15,5 15,5 Unit power input Cooling kw Heating kw EER 2,74 2,68 2,61 COP 2,93 3,03 2,96 ESEER 3,96 4,06 3,78 Casing Colour RAL7032 Material Galvaniz. and painted steel sheet Height mm Dimensions Unit Width mm Depth mm Weight Unit kg Operating Weight kg Type Shell and tube Water volume l Nominal water Cooling l/min Water heat flow rate Heating l/min exchanger Nominal Water Cooling kpa pressure drop Heating kpa Insulation material Closed cell foam elastomer Air heat exchanger Type Louvred fins Grooved tubes Type Axial Drive Direct drive Diameter mm Nominal air flow m³/min Fan Quantity Speed in cooling rpm Model Motor output in cool. W Speed in heating rpm Motor output in heat. W Type Semi-hermet. single screw compr. Compressor Oil charge l Quantity Sound level Sound Power Cooling dba 94,2 94,2 94,2 Heating dba 96,4 96,4 96,4 Sound Pressure Cooling dba 74,1 74,1 74,1 Heating dba 76,3 76,3 76,3 Refrigerant type R-134a R-134a R-134a Refrigerant circuit Refrigerant charge kg N. of circuits Piping connections Evaporator water inlet/outlet Safety devices High pressure (pressure switch) Safety devices Low pressure (pressure switch) Safety devices Condensation fan magneto-thermal Safety devices High discharge temperature on the compressor Safety devices Phase monitor Safety devices Low pressure ratio Safety devices High oil pressure drop Safety devices Low oil pressure Cooling capacity, unit power input in cooling and EER are based on the following Notes conditions: evaporator 12 C/7 C; ambient 35 C. Heating capacity, unit power input in heating and COP are based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. 504 B 07/05 A EN pag 16/48

17 ELECTRICAL SPECIFICATIONS McEnergy HPI LN Phase 3~ 3~ 3~ Frequency Hz Power Supply Voltage V Voltage Tolerance Minimum % -10% -10% -10% Maximum % +10% +10% +10% Maximum starting current A Nominal running current cooling A Unit Nominal running current heating A Maximum running current A Maximum current for wires sizing A Fans Nominal running current in cooling A 21,6 21,6 21,6 Nominal running current in heating A 26,4 26,4 26,4 Phase 3~ 3~ 3~ Voltage V Compressor Voltage Tolerance Minimum % -10% -10% -10% Maximum % +10% +10% +10% Maximum running current A Starting method Allowed voltage tolerance ± 10%. Voltage unbalance between phases must be within ± 3%. Nominal current in cooling mode is referred to installation with 25kA short circuit current and is based on the following conditions: evaporator 12 C/7 C; ambient 35 C. Notes Nominal current in heating mode is referred to installation with 25kA short circuit current and is based on the following conditions: condenser 40 C/45 C; ambient 7 CDB/6 CWB. Maximum starting current: starting current of biggest compressor + 75% of maximum current of the other compressor + fans current for the circuit at 75%. Maximum current for wires sizing: (compressors full load ampere + fans current) x 1, B 07/05 A EN pag 17/48

18 Sound levels McEnergy HPI ST in cooling and heating Unit Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10-5 Pa) Power size 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz db(a) db(a) ,9 73,5 73,7 72,8 79,0 67,2 58,6 49,8 80,0 99, ,9 73,5 73,7 72,8 79,0 67,2 58,6 49,8 80,0 99, ,9 73,5 73,7 72,8 79,0 67,2 58,6 49,8 80,0 99, ,2 73,8 74,0 73,1 79,3 67,5 58,9 50,1 80,3 100, ,2 73,8 74,0 73,1 79,3 67,5 58,9 50,1 80,3 100, ,2 73,8 74,0 73,1 79,3 67,5 58,9 50,1 80,3 100, ,2 73,8 74,0 73,1 79,3 67,5 58,9 50,1 80,3 100,4 Note: The values are according to ISO 3744 and are referred to units without pumps kit. Sound levels McEnergy HPI LN in cooling Unit Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10-5 Pa) Power size 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz db(a) db(a) ,2 70,5 69,0 67,7 72,3 62,0 53,6 44,4 73,7 93, ,2 70,5 69,0 67,7 72,3 62,0 53,6 44,4 73,7 93, ,2 70,5 69,0 67,7 72,3 62,0 53,6 44,4 73,7 93, ,6 70,9 69,4 68,1 72,7 62,4 54,0 44,8 74,1 94, ,6 70,9 69,4 68,1 72,7 62,4 54,0 44,8 74,1 94, ,6 70,9 69,4 68,1 72,7 62,4 54,0 44,8 74,1 94, ,6 70,9 69,4 68,1 72,7 62,4 54,0 44,8 74,1 94,2 Note: The values are according to ISO 3744 and are referred to units without pumps kit. Sound levels McEnergy HPI LN in heating Unit Sound pressure level at 1 m from the unit in semispheric free field (rif. 2 x 10-5 Pa) Power size 63 Hz 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz 8000 Hz db(a) db(a) ,8 73,8 72,0 70,5 74,5 64,8 56,5 47,2 76,1 95, ,8 73,8 72,0 70,5 74,5 64,8 56,5 47,2 76,1 95, ,8 73,8 72,0 70,5 74,5 64,8 56,5 47,2 76,1 95, ,9 73,9 72,1 70,6 74,7 65,0 56,6 47,4 76,3 96, ,9 73,9 72,1 70,6 74,7 65,0 56,6 47,4 76,3 96, ,9 73,9 72,1 70,6 74,7 65,0 56,6 47,4 76,3 96, ,9 73,9 72,1 70,6 74,7 65,0 56,6 47,4 76,3 96,4 Note: The values are according to ISO 3744 and are referred to units without pumps kit. Sound pressure correction factor for different distances McEnergy HPI ST/LN Distance (m) Unit size ,9-12,7-15,8-18,1-19, ,9-12,7-15,8-18,1-19, ,9-12,7-15,8-18,1-19, ,5-12,2-15,3-17,5-19, ,5-12,2-15,3-17,5-19, ,5-12,2-15,3-17,5-19, ,5-12,2-15,3-17,5-19,3 Note: The values are db(a) (pressure level). 504 B 07/05 A EN pag 18/48

19 Standard ratings in cooling mode McEnergy HPI ST Leaving water temp. ( C) C. C. (kw) P. I. (kw) 68,0 68,8 69,7 70,6 71,5 72,4 73,3 74,3 75,2 76,2 77,2 78,1 20 C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) 73,6 74,5 75,5 76,4 77,3 78,3 79,3 80,3 81,3 82,3 83,4 84,4 25 C. C. (kw) P. I. (kw) McEnergy HPI ST AIR AMBIENT TEMPERATURE ( C) C. C. (kw) P. I. (kw) 79,9 80,9 81,8 82,8 83,8 84,8 85,9 86,9 88,0 89,0 90,1 91,2 C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) 86,8 87,8 88,8 89,8 90,8 91,9 93,0 94,1 95,2 96,3 97,4 98,5 C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) 94,3 95,3 96,3 97,4 98,4 99, C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) Notes: C.C. (cooling capacity) and P.I. (unit power input) are referred to 0,0176m2 C/kW evaporator fouling factor. conditions are for compressors running at nominal frequency; boost is referred to compressors running at maximum frequency. 10% glycol is raccomended for units running in the shaded areas. 504 B 07/05 A EN pag 19/48

20 Standard ratings in cooling mode McEnergy HPI ST Leaving water temp. ( C) C. C. (kw) P. I. (kw) 75,5 75,9 76,6 77,4 78,4 79,5 80,6 81,7 82,8 83,7 84,6 85,2 20 C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) 79,9 80,6 81,6 82,7 84,0 85,3 86,7 88,1 89,5 90,8 91,9 92,8 25 C. C. (kw) P. I. (kw) McEnergy HPI ST AIR AMBIENT TEMPERATURE ( C) C. C. (kw) P. I. (kw) 87,5 88,3 89,4 90,6 92,0 93,4 94,9 96,4 97,8 99, C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) 96,5 97,2 98,1 99, C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) Notes: C.C. (cooling capacity) and P.I. (unit power input) are referred to 0,0176m2 C/kW evaporator fouling factor. conditions are for compressors running at nominal frequency; boost is referred to compressors running at maximum frequency. 10% glycol is raccomended for units running in the shaded areas. 504 B 07/05 A EN pag 20/48

21 Standard ratings in cooling mode McEnergy HPI ST Leaving water temp. ( C) C. C. (kw) P. I. (kw) 81,1 82,1 83,2 84,5 85,8 87,1 88,3 89,5 90,5 91,3 91,9 92,1 20 C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) 86,3 87,2 88,4 89,7 91,1 92,6 94,2 95,7 97,1 98,4 99, C. C. (kw) P. I. (kw) McEnergy HPI ST AIR AMBIENT TEMPERATURE ( C) C. C. (kw) P. I. (kw) 95,5 96,2 97,1 98,4 99, C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) Notes: C.C. (cooling capacity) and P.I. (unit power input) are referred to 0,0176m2 C/kW evaporator fouling factor. conditions are for compressors running at nominal frequency; boost is referred to compressors running at maximum frequency. 10% glycol is raccomended for units running in the shaded areas. 504 B 07/05 A EN pag 21/48

22 Standard ratings in cooling mode McEnergy HPI ST Leaving water temp. ( C) C. C. (kw) P. I. (kw) 87,6 88,9 90,1 91,1 92,0 92,9 93,8 94,8 95,8 96,9 98,1 99,6 20 C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) 94,0 95,5 96,8 98,0 99, C. C. (kw) P. I. (kw) McEnergy HPI ST AIR AMBIENT TEMPERATURE ( C) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) Notes: C.C. (cooling capacity) and P.I. (unit power input) are referred to 0,0176m2 C/kW evaporator fouling factor. conditions are for compressors running at nominal frequency; boost is referred to compressors running at maximum frequency. 10% glycol is raccomended for units running in the shaded areas. 504 B 07/05 A EN pag 22/48

23 Standard ratings in cooling mode McEnergy HPI ST Leaving water temp. ( C) C. C. (kw) P. I. (kw) 92,4 93,5 94,6 95,8 96,9 98,1 99, C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) McEnergy HPI ST AIR AMBIENT TEMPERATURE ( C) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) Notes: C.C. (cooling capacity) and P.I. (unit power input) are referred to 0,0176m2 C/kW evaporator fouling factor. conditions are for compressors running at nominal frequency; boost is referred to compressors running at maximum frequency. 10% glycol is raccomended for units running in the shaded areas. 504 B 07/05 A EN pag 23/48

24 Standard ratings in cooling mode McEnergy HPI ST Leaving water temp. ( C) C. C. (kw) P. I. (kw) 99, C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) McEnergy HPI ST AIR AMBIENT TEMPERATURE ( C) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) Notes: C.C. (cooling capacity) and P.I. (unit power input) are referred to 0,0176m2 C/kW evaporator fouling factor. conditions are for compressors running at nominal frequency; boost is referred to compressors running at maximum frequency. 10% glycol is raccomended for units running in the shaded areas. 504 B 07/05 A EN pag 24/48

25 Standard ratings in cooling mode McEnergy HPI ST Leaving water temp. ( C) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) McEnergy HPI ST AIR AMBIENT TEMPERATURE ( C) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) C. C. (kw) P. I. (kw) Notes: C.C. (cooling capacity) and P.I. (unit power input) are referred to 0,0176m2 C/kW evaporator fouling factor. conditions are for compressors running at nominal frequency; boost is referred to compressors running at maximum frequency. 10% glycol is raccomended for units running in the shaded areas. 504 B 07/05 A EN pag 25/48