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Climaveneta Technical Bulletin
ERACS2_WQ_0802_3202_201110_EN
ERACS2-WQ
Units for 4 pipes-systems water source
0802 - 3202
185 - 850 kW
Unique proposal
Energy saving
Extensive range of operation
Integrated condensing control
(The photo of the unit is indicative and may change depending on the model)
SUMMARY
1. Product presentation
1.1 Unique proposal
1.2 Energy saving
1.3 Extensive range of operation
1.4 Integrated condensing control
1.5 Tests
2. Unit description
2.1 Units for 4 pipes-systems water source
2.2 Standard unit composition
2.3 Certifi cation
2.4 Unit´s tests
2.5 Electronic control W3000SE Large
2.6 Accessories
2.7 Operating principle
2.8 Group regulation device
2.9 Supervisory device
3. Technical data
3.1 General technical data
4. Operating range
5. Hydraulic data
5.1 Water fl ow and pressure drop
6. Electrical data
7. Full load sound level
8. Dimensional drawings
9. Legend of pipe connections
10. Condensation control devices
11. Variable fl ow system (optional)
12. Hydraulic connections recommended
ERACS2-WQ
ERACS2-WQ
0802 - 3202 pg. n° III pg. n° 6 pg. n° 8 pg. n° 9 pg. n° 9 pg. n° 10 pg. n° 11 pg. n° A1 pg. n° A6 pg. n° B1 pg. n° C1 pg. n° D1 pg. n° III pg. n° III pg. n° III pg. n° III pg. n° IV pg. n° 1 pg. n° 1 pg. n° 1 pg. n° 2 pg. n° 2 pg. n° 2 pg. n° 3 pg. n° 4 pg. n° 5 pg. n° 5 pg. n° 6
Company quality system certifi ed to UNI EN ISO 9001 and environmental certifi cation
UNI EN ISO 14001
Liability disclaimer
This bulletin is not exhaustive about: installation, use, safety precautions, handling and transport. Refer to “General Manual for Installation” for further informations.
This bulletin refers to standard executions, in particular for dimension, weight, electric, hydraulic, aeraulic and refrigerant connections (whereas applicable). Contact Climaveneta Commercial Offi ce for further drawings and schemes.
Climaveneta declines any liability derived from the bulletin’s use.
This bulletin is of exclusive property of Climaveneta, and all forms of copy are prohibited.
The data contained herein are subject to variation without notice.
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ERACS2_WQ_0802_3202_201110_EN HFC R134a
ERACS2-WQ
1. PRODUCT PRESENTATION
The ERACS2-WQ series multi-use units are able to simultaneously meet hot and cold water production requests and are thus a valid alternative to traditional systems based on chillers and boilers for applications such as offi ce blocks, pools and shopping centres.
The advanced control logic, developed by Climaveneta, ensures that heating and cooling loads are perfectly met. When these are simultaneous, the unit exchanges evaporation and condensation heat with the system cooling and heating circuits respectively. When heat loads are not balanced or one of the two are missing, the unit automatically switches to a third heat source which can be air or water according to the model.
The ERACS2-WQ units are ideal for indoor installation. For these products, heat is exchanged on the source side by a shell & tube exchanger that acts as a condenser or evaporator according to machine conditions. The heat source is made up of natural resources such as surface water basins or bore hole water associated with geothermal systems.
1.1 Unique proposal
Unit designed to satisfy the cold and the hot side requirements simultaneously, for 4-pipe systems without any particular operation mode setting.
1.2 Energy saving
Energy saving guaranteed by the advanced operation’s logic.
The best operation mode is set completely automatically and independently by the unit’s controller, in order to minimize the absorbed energy whatever the cooling and/or heating demand might be.
1.3 Extensive range of operation
Supply of hot water in use up to 55°C, offering maximum versatility with respect to different plant engineering solutions.
1.4 Integrated condensing control
A pressostatic valve is supplied as standard for the condensation control. Under request is available even a 3-way valve option, for all the applications in which a constant waterfl ow is assumed to be on the condenser.
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1.5 Tests
Perfect functionality of Climaveneta units is guaranteed by accurate tests carried out along the productive process, and by fi nal test of every unit at the end of the work cycle, as imposed by ISO9001.
Climaveneta also offers clients the chance to require and witness additional performance and sound level tests be performed; highly skilled technical crew follow these operations in detail, to ensure maximum satisfaction of the customer.
For units of the ERACS series Climaveneta offers the possibility to conduct visionati or presenziati tests.
Running tests are standard tests similar to those normally conducted at the productive unit that the client can observe without participation.
Performance tests are based on the measurement of electric data, water fl ow, working temperature, electric power absorbed, and capacity delivered.
Measurements can be made at one or three work points while varying the outlet temperatures of the evaporator and condenser conditions. At the clients discretion, performance tests can be conducted under full or part load conditions for every operating mode possible for the unit.
Full load tests conducted in one or three work points permit two further personalized versions:
• with a mixture of ethyl glycol water in the heat exchanger;
• up to the maximum working temperature of the heat exchanger on the source side.
Witness tests are extra tests that the client can observe and during which can request clarifi cations upon modalities or work conditions of the unit, receiving test reports at the end. Witness tests can include sound level and performance tests.
Acoustical tests allow to verify levels of sound emissions of the unit; tests are performed repeating measurements of sound pressure in determined points, positioned on an ideal grid with walls 1 meter distance from the unit panels. For every measuring point a spectrum in octave band for sound pressure and the average value is supplied to the customer. Then the average global values for pressure at 1 meter, according to ISO3744, and the average sound power, referred to the whole unit, are counted.
Part load tests can be conducted using two different load partialization methods: the fi rst one requires to reduce the active resources’ number, while second one requires to modulate load on each resource. At part load the unit can be tested just in one working point.
The following two tests can always be requested during fi nal testing:
• Simulation of the most common alarm states
• Measurement of pressure drop of exchanger on hydraulic circuit side
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2. UNIT DESCRIPTION
2.1 Units for 4 pipes-systems water source
Multi-purpose indoor unit for use in 4-pipe systems for the simultaneous production of chilled and hot water by means of two independent water circuits. These units are able to satisfy the demand for hot and cold water simultaneously through a system that does not require seasonal switching. Each circuit works with a semi-hermetic screw compressor using R134a, and three tube nest heat exchangers, a cold exchanger on the user side shared by both circuits that acts as an evaporator in the production of cold water, a heat exchanger on the user side that words as a condenser in the production of hot water, and a source side exchanger that works as either condenser or evaporator as required by the loads.
2.2 Standard unit composition
Frame
Frame in polyester-painted galvanized steel. The self-supporting frame is built to guarantee maximum accessibility for servicing and maintenance operations.
Plant -side cold heat exchanger
The direct expansion type tube nest exchanger acts as an evaporator with refrigerant fl ow on the tube nest side and water fl ow on the shell side. The tubes have asymmetrical fl ows that maintain the correct speed of the refrigerant in the tubes when passing from the liquid phase into steam. The water fl ow on the shell side is fi tted with baffl es to increase turbulence and therefore the effi ciency of exchange. The steel shell has external foamed closed-cell elastomer insulating lining 10 mm thick and thermal conductivity of 0.033 W/mK at 0°C. The tube nest is manufactured using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates. The heat exchanger is fi tted with a differential pressure switch which controls the fl ow of water when the unit is working, in this way preventing the formation of ice inside.
The heat exchanger is made in compliance with PED standard work pressure requisites.
Refrigerant circuit
The unit has two completely independent cooling circuits in order to ensure continuous operation, limited pollution, and easy maintenance. Each cooling circuit is fi tted as standard with:
• externally equalised thermostat valve
• safety valves and high and low pressure transducers
• check valve on the compressor delivery line
• on-off cock on the compressor delivery line and refrigerant line
• solenoid valve on the refrigerant line
• dryer fi lter with replaceable cartridge
• refrigerant line sight glass with humidity indicator
• high-pressure safety pressure-switch.
Plant -side hot heat exchanger
The tube nest heat exchanger acts as a condenser with refrigerant fl ow on the tube nest side and water fl ow on the shell side. The tubes have asymmetrical fl ows that maintain the correct speed of the refrigerant in the tubes when passing from the liquid phase into steam. The water fl ow on the steel shell side is fi tted with baffl es to increase turbulence and therefore the effi ciency of exchange. The tube nest is manufactured using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates. The heat exchanger is fi tted with a differential pressure switch which controls the fl ow of water when the unit is working, in this way preventing anomalies and overheating. The heat exchanger is made in compliance with PED standard requisites for work pressure.
Screw compressors
Semi-hermetic screw compressors with 2 fi ve- and six-lobe rotors: the fi ve-lobe rotor is splined directly onto the motor without the use of interposed overgears. The use of the two rotors permits elevated volumetric output, uniform gas fl ow without pulsation, and reduced vibration and dimensions. The bearings provided along the rotor axis in a separate chamber isolated from the compression chamber are made in carbon steel. The insertion of an economiser between the source-side heat exchanger and the cold exchanger on the user side permits increased cooling output and EER. Each compressor is provided with an inlet for the injection of refrigerant (for the extension of operating limits) and the use of the economiser. Lubrication is forced without using an oil pump; the built-in oil separator has
3 stages of separation, and a 10 mm stainless steel mesh fi lter ensures the constant presence of oil inside. Cooling power is partialised by a slide valve, which depending on the position assumed, permits compression chamber reduction by steps; each compressor can therefore deliver 100%, 75% and 50% of its capacity.
Source -side heat exchanger
The tube nest heat exchanger guarantees the energy balance in the circuit whenever the heat and cold loads have different values and therefore acts as either evaporator or condenser as required, with refrigerant fl ow on the tube nest side and water fl ow on the shell side. The tubes have asymmetrical fl ows that maintain the correct speed of the refrigerant in the tubes when passing from the liquid phase into steam. The steel shell has external foamed closed-cell elastomer insulating lining 10 mm thick and thermal conductivity of 0.033 W/mK at 0°C. The tube nest is manufactured using copper tubes with internal grooves for favouring heat exchange and mechanically expanded onto the tube plates. The heat exchanger is fi tted with a differential pressure switch which controls the fl ow of water when the unit is working, in this way preventing the formation of ice inside.
Condensation control is ensured by a 2-way modulation valve that adjusts the fl ow of water inside the exchanger (see dedicate section).
The two pole motors with 2950 rpm rotation speed are fi tted with electric devices that limit the current absorbed during compressor start-up and empty start-up, both of which are preset as standard. Each compressor is fi tted with manual-reset motor thermal protection, delivery gas temperature control, oil level check, and an electric resistance for the heating of the sump when the compressor is stopped. A check valve fi tted on the refrigerant delivery line prevents the rotors from reversing after stopping. On-off cocks on the delivery line of each compressor can cut off the supply of refrigerant gas to the exchangers when required.
Electric power and control power
Electric power and control panel compliant with EN 60204-1/
IEC 204-1, complete with:
• electronic controller
• transformer for control circuit
• general door lock isolator
• power circuit with bar distribution system
• fuses and contactors for compressors
• terminals for cumulative alarm block
• remote ON/OFF terminals
• spring-type control circuit terminal boards
• phase sequence relays.
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2.3 Certifi cation
• CE - Product quality certifi cate for the European Union
• GOST - Product quality certifi cate for Russian Federation
• SAFETY QUALITY LICENCE - Product quality certifi cate for
Popular Republic of China
• M&I - Product quality certifi cate for Australia and New Zealand
• Machine directive 2006/42/CE
• PED directive 97/23/EC
• Low Voltage directive 2006/95/EC
• ElectroMagnetic compatibility directive 2004/108/EC
• ISO 9001 - Company´s Quality Management System certifi cation
• ISO 14001 - Company´s Environmental Management System certifi cation
2.4 Unit´s tests
Testing is conducted throughout the productive process using the procedures specifi ed in ISO9001. Both performance and sound tests can be performed in the presence of the client upon payment. Performance tests consist in the measurement of electric data, water fl ows, work temperature, absorbed power and power output under both full and partial load conditions. During performance tests, the main alarm states can be simulated and the pressure drops in the exchangers can be measured. Sound tests permit the verifi cation of the sound power level radiated by the unit and provide the client with the sound pressure spectrum in octave bands, the average sound pressure level, and its average global sound pressure values at a distance of 1 meter, and the sound power produced by the entire unit.
2.5 Electronic control W3000SE Large
The controller W3000 large offers the latest control and functions specially developed for these units.
The keypad is generously sized with full operating status display. The controls and detailed LCD make access to machine settings easy and safe. These resources permit to diirectly act on the unit settings through a multilevel menu, available in several languages.
The diagnostics includes full management of alarms with blackbox functions and alarm record for better analysis of unit performance.
For multi-units plants a special device to coordinate and manage all the resources is available as an option; energy metering device is even possible as an option. Supervision is easy through Climaveneta devices or with various options for interfacing to ModBus, Bacnet, Echelon LonTalk protocols.
Compatibility with remote keyboard (management up to 10 units). Clock available with programming of operation (standard
4 days and 10 time bands).
Temperature regulation managed on the two water circuits, with a proportional logic referred to the return water temperatures.
This allows to satisfy simultaneously the different heating- and cooling requests, with no need of mode changeover.
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ERACS2-WQ
2.6 Accessories
ACCESSORIES
Soft start
Electronic expansion valve (only cooling)
Integral acoustic enclosure basic
Integral acoustic enclosure plus
3 way-valve for the condensing pressure control (see dedicate section)
VPF system (see dedicate section)
Compressors' on/off signal
ModBUS connectivity
BACnet connectivity
Echelon connectivity
Auxiliary signal 4-20mA
Automatic circuit breakers
Input remote Demand
Limit
Numbered cables on electrical board
Remote signal double set-point
Evaporator fl owswitch
(water side)
Container packing
Rubber anti vibration device
DESCRIPTION
Electronic device adopted to manage the inrush current.
BENEFIT
Break down of the inrush current as soon as the electrical motor is switch on, lower motor's mechanical wear, favourable sizing for the electrical system.
Electronic lamination device wtih step motor. It is designed for the continuous and precise control of refrigerant fl ow entering in the evaporator. This solution permits extremely short times for reaction to variation in load, optimising power consumption.
Enclosure realized with peraluman panels lined with an acoustic insulation made by polyester fi ber of thickness 30 mm. The sound power level reduction achieved with this accessory is 14 dB(A).
Enclosure realized with peraluman panels lined with a special acoustic insulation composed by 5 alternating layers of polyurethane and gaiter of total thickness 50 mm. The sound power level reduction achieved with this accessory is
18 dB(A).
3 way modulating valve in grey cast iron with diverting function. The valve is selected and tested by Climaveneta during the unit's test. Recommended for geo-thermal applications, in which constant waterfl ow is necessary. (Separately supplied, not mounted)
Predisposition for the variable fl ow pumps' control on the primary circuit/s. The system comprises: extensions on the controller to read the system's pressure transducer signals
(4-20 mA) and the consequent management of pumps and bypass valve (0-10 V signal), additional pressure transducer as extra safety device. [Pressure transducer, pumps and bypass valve at client responsability]
Auxiliary contacts providing a voltage-free signal
Interface module for ModBUS protocols
Interface module for BACnet protocols
Interface module for Echelon systems
Energy consumption associated with fl uid circulation drops signifi cantly, very often over 50%. Beyond the energy saving and the consequent lower operating costs, this new approach enables simplifi cation in the plant's design that ensures substantial savings in initial investment costs. The integration of variable fl ow pumps on board, permits signifi cant savings in overall dimensions, circuit components and in the system's commissioning.
Allows remote signalling of compressor's activation or remote control of any auxiliary loads.
Allows integration with BMS operating with ModBUS protocol
Allows integration with BMS operating with BACnet protocol
Allows integration with BMS operating with LonWorks procotls
4..20mA analogue input. Allows to change the operating set-point according to the value of current applied to the analogue input
Enforce Energy Saving policies
Over-current switch on the major electrical loads.
Digital input (voltage free)
It protects compressors and/or fans from possible current peaks.
It permits to limit the unit's power absorption for safety reasons or in temporary situation.
Allows to activate the Energy Saving set-point Enforce Energy Saving policy
DEMETRA (see dedicated manual)
Software to monitor capacity and energy absorbed by the units.
Allows a dynamic monitoring of the installed units and therefore a data (hourly based) downloading to support the current needs of energy management.
Group regulation device
Supervisory device
(see dedicate section)
(see dedicate section)
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2.7 Operating principle
The ERACS2-WQ units are especially designed for 4 pipes systems. Their hydraulic circuits are therefore divided into two separated sections: one hot (condenser side) and one cold
(evaporator side). [See picture below]. These units can produce hot and chilled water at the same time and totally indipendently, adapting to the various temperatures requests inside the building.
There are three basic operating confi gurations which are totally independent from external temperature conditions:
- only chilled water production (the unit works as a simple chiller);
- only hot water production (the unit works as an heat pump);
- combined production of hot and chilled water (the unit produces simultaneously and autonomously cold and hot water for the two plant’s sections).
The above working confi gurations are selected automatically
(on-board microprocessor) in order to minimize the absorbed energy and satisfy each thermal building’s requests. circuit 1 liquid separator compressor condenser
Hot primary circuit condenser compressor circuit 2 liquid separator liquid receiver liquid receiver evaporator
Cold primary circuit
ONLY CHILLED WATER PRODUCTION
The unit works like a simple chiller water condensed.
The cold primary circuit water is cooled thanks to the heat exchange on the evaporator, while the condensation heat is rejected in the external water source through a shell and tube heat exchanger which works like a condenser.
COMBINED PRODUCTION OF HOT AND CHILLED WATER
If users required hot and chilled water at the same time, the unit behaves like a water-water unit, managing condensation and evaporation on two separate heat exchangers connected with the two separate circuits (hot and cold) of the 4-pipes plant.
The cooling and heating energy are provided respectively to evaporator and condenser. These heat exchangers are then hydraulically coupled to the two circuits (cold and heat) of the
4-pipes plant.
ONLY HOT WATER PRODUCTION
In this case, the unit works exactly like a heat pump.
The hot primary circuit water is heated thanks to the heat exchange on the condenser, while the evaporation heat is obtained from the external water source through a shell and tube heat exchanger which, in this case, works like an evaporator.
The main difference with traditional heat pumps is that the hot water is produced in a heat exchanger which is not the same of the one previously used to produce chilled water. This is necessary in order to keep the hot and cold plant’s sections separate as required by 4-pipes systems.
The multi-purpose units are designed with two separate refrigerant circuits. Thanks to the advanced control logic specifi cally developed for these units, this solution ensures the units are always able to respond to building climate control requirements.
The two refrigerant circuits are intelligently managed by the unit’s controller and are able to adopt independently one from the other the most convenient operation mode to satisfy the building’s requirements with the highest effi ciency.
The use of suitable thermal accumulations, both on the cold and hot sides, offers effective system operating modularity and optimises running costs.
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2.8 Group regulation device
MANAGER 3000
Manager3000 allows the regulation within a group of hydronic units. The controller features high-level algorithms and user interface. The controller is suitable for the management of
2- or 4-pipe systems, with regulation on one water circuit, for chiller- or heat pump units and relevant mode change-over, and also with regulation on two circuits, with independent set-points and parameters, thus exploiting the simultaneous supply of chilled- and hot water.
The controller manages up to 8 units, with activation logic focused at the balancing of operation times and at the achievement of the highest energy effi ciency. It is possible to defi ne conditions of dynamic stand-by and priority as regards the units’ activation. It is also feasible the rotation among the system’s units, also in cases of constant load.
The alarm management is featured, with plain text descriptions and possible notifi cation to remote recipients. Two relay outputs are available, associated to unit- and device alarms.
The user interface allows a safe and easy use, thanks to its touch-screen display, back-lit 8.4” type.
The multi-level menu features the language selection and differentiated access profi les(user and maintenance).The circuit temperatures and the status of both system- and unit- operation are displayed, via one overview page plus detailed pages. The regulation can be based on proportional- or proportional+integral logics, or also on a dead-band algorithm with dynamic adjustment, with relevant temperature inputs managed by the device.
Features as set-point offset, also referred to the outdoor temperature, and demand limit are included, with relevant analog inputs.
The device is integrated in the best way with the units, preventing simultaneous activations or resources and optimizing effi ciency, overall inrush current values and also operation of water pumps possibly associated to the units.
The WebManager option allows the access to the device and its settings, via any computer, with direct- or LANbased connection, therefore also via internet resources; this is associated to the availability of historical charts for the main operating variables.
The “Variable Primary Flow” option represents a unique regulation dedicated to hydronic systems with variable water fl ow.
This represents a crucial contribution to the reduction of the costs related to the hydraulic plant and its operation.
It is available as option the interface with the Demetra metering device: thus it is possible to acquire and log the values of the system units’ electric consumption, together with their operating status; this allows therefore to analyze the system’s operating performances throughout time, in terms of both absorbed energy and cooling / heating capacities, consistently with the implementation of enhanced energy management policies for the building.
2.9 Supervisory device
FWS 3000
Supervisory device for a system composed of Climaveneta units.
Supervision can be operated via any computer, with direct- or LAN-based connection. It is therefore achieved the internet-based management of the resources, thanks to the built-in web-server and to the availability of web pages specifi cally defi ned both for the overall system monitoring and the access to detailed information about each unit.
The supervision achieved by this way does not require the installation of any additional software on the computer and utilizes the most common browsers. This allows the use of any computer connected to the network or web. A RS-485 serial connection is available for the communication with the slave devices, up to 15 connected units. FWS3000 is particularly effective for the supervision of systems composed of packaged or WET units.
The access to the supervision is easy and safe, thanks to the use of password. It is possible to visualize a complete list of unit operational variables: temperatures, humidity, indoor air quality, status of the unit. This is associated to the availability of historical charts for the main operating variables. It is also available the display of alarms, with plain text descriptions and possible notifi cation to remote recipient.
The setting of the main operational parameters, for each unit, is also allowed: unit status, mode, set-point, time scheduling (based on 4 days, 10 time belts per day).
Various levels of customization are offered, for both the web pages and connectivity-related functions.
It is available as option the interface with the Demetra metering device: thus it is possible to acquire and log the values of the system units’ electric consumption, together with their operating status; this allows therefore to analyze the system’s operating performances throughout time, in terms of both absorbed energy and cooling / heating capacities, consistently with the implementation of enhanced energy management policies for the building.
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ERACS2_WQ_0802_3202_201110_EN HFC R134a
3.1 GENERAL TECHNICAL DATA
SIZE
ERACS2-WQ
COOLING
Cooling capacity
Total power input (unit)
EER
ESEER
Heat exchanger water flow
Heat exchanger pressure drop
Source (side) heat exchanger water flow
Source (side) heat exchanger pressure drop
ERACS2-WQ
HEATING
Heating capacity
Total power input (unit)
COP
Heat exchanger water flow
Heat exchanger pressure drop
ERACS2-WQ/R
REFRIGERATION AND HEATING
Cooling capacity
Total power input (unit)
Heat exchanger water flow
Heat exchanger pressure drop
Heat recovery thermal capacity
CUE - Coefficient of useful effect
Heat exchanger recovery water flow
Plant side heat exchanger recovery pressure drop
COMPRESSORS
Number
Number of capacity
Number of circuits
Type of regulation
Minimum capacity steps
Type of refrigerant
Refrigerant charge
Oil charge
NOISE LEVELS
Total sound power
Total sound pressure
DIMENSIONS AND WEIGHTS
Length
Width
Height
Weight
(2) kW kW m³/h kPa
(3) kW kW m³/h kPa kW m³/h kPa
ERACS2-WQ
0802 kW kW
(1) m³/h kPa m³/h kPa
194
34,2
5,68
-
33,4
29,0
12,2
3,88
205
45,7
4,49
35,7
33,1
162
45,7
33,4
29,0
205
8,04
35,7
33,1
N°.
N°.
N°.
% kg.
kg.
(4) dB(A) dB(A)
(5) mm.
mm.
mm.
kg.
2
4
2
STEPS
25
R134a
46
19
94
62
3680
1170
1950
2420
1002
240
43,0
5,58
-
41,3
36,7
15,1
4,93
255
56,9
4,48
44,3
42,1
95
63
3680
1170
1950
2470
2
4
2
STEPS
25
R134a
56
19
201
56,9
41,3
36,7
255
8,01
44,3
42,1
1102
275
48,5
5,66
-
47,3
49,2
17,3
6,57
291
65,8
4,42
50,6
56,3
1302
326
57,1
5,71
-
20,5
5,66
344
76,3
4,51
59,8
48,3
1502
372
65,8
5,66
-
23,4
5,13
393
86,9
4,52
68,3
43,5
1702
435
76,9
5,65
-
459
103
4,44
79,8
56,3
1902
480
86,0
5,58
-
56,1
42,5
64,1
38,4
74,8
49,5
82,6
28,6
27,4
6,61
30,2
3,84
514
117
4,41
89,2
33,4
97
65
3680
1170
1950
2880
2
4
2
STEPS
25
R134a
56
30
229
65,8
47,3
49,2
291
7,91
50,6
56,3
97
65
3680
1170
1950
3580
2
4
2
STEPS
25
R134a
58
30
272
76,3
311
86,9
362
103
344
8,08
59,8
48,3
393
8,10
68,3
43,5
459
7,94
79,8
56,3
404
117
56,1
42,5
64,1
38,4
74,8
49,5
82,6
28,6
514
7,88
89,2
33,4
2
4
2
STEPS
25
R134a
75
30
97
65
3680
1170
1950
3690
2
4
2
STEPS
25
R134a
75
30
97
65
3680
1170
1950
3750
2
4
2
STEPS
25
R134a
102
30
97
65
3800
1490
1950
4920
4
5
-
3
1
2
Plant (side) cooling exchanger water (in/out) 12/7 °C
Source (side) heat exchanger water (in/out) 14/30 °C
Plant (side) heating exchanger water (in/out) 40/45 °C
Source (side) heat exchanger water (in/out) 14/7 °C
Plant (side) cooling exchanger water (in/out) 12/7 °C
Source (side) heat exchanger water (in/out) 30/35 °C
Plant (side) heating exchanger water (in/out) 40/45 °C
Source (side) heat exchanger water (in/out) 12/7 °C
Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certif ed units; in compliance with ISO 3744 for non-certif ed units
Average sound pressure level, at 10 (m.) distance, unit in a free f eld on a ref ective surface; non-binding value obtained from the sound power level
Standard configuration
Not available
ELCADOC - Ver. 0.9.9.17
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ERACS2_WQ_0802_3202_201110_EN Ref.: R134a
GENERAL TECHNICAL DATA
SIZE
ERACS2-WQ
COOLING
Cooling capacity
Total power input (unit)
EER
ESEER
Heat exchanger water flow
Heat exchanger pressure drop
Source (side) heat exchanger water flow
Source (side) heat exchanger pressure drop
ERACS2-WQ
HEATING
Heating capacity
Total power input (unit)
COP
Heat exchanger water flow
Heat exchanger pressure drop
ERACS2-WQ/R
REFRIGERATION AND HEATING
Cooling capacity
Total power input (unit)
Heat exchanger water flow
Heat exchanger pressure drop
Heat recovery thermal capacity
CUE - Coefficient of useful effect
Heat exchanger recovery water flow
Plant side heat exchanger recovery pressure drop
COMPRESSORS
Number
Number of capacity
Number of circuits
Type of regulation
Minimum capacity steps
Type of refrigerant
Refrigerant charge
Oil charge
NOISE LEVELS
Total sound power
Total sound pressure
DIMENSIONS AND WEIGHTS
Length
Width
Height
Weight
(2) kW kW m³/h kPa
(3) kW kW m³/h kPa kW m³/h kPa
ERACS2-WQ
2152 kW kW
(1) m³/h kPa m³/h kPa
556
94,7
5,87
-
95,7
26,8
34,8
3,55
589
128
4,59
102
30,7
468
128
95,7
26,8
589
8,25
102
30,7
N°.
N°.
N°.
% kg.
kg.
(4) dB(A) dB(A)
(5) mm.
mm.
mm.
kg.
2
4
2
STEPS
25
R134a
112
37
98
66
3800
1490
1950
5310
2502
649
111
5,84
-
112
36,6
40,7
4,85
686
148
4,62
119
41,6
99
67
3800
1490
1950
5730
2
4
2
STEPS
25
R134a
112
44
547
148
112
36,6
686
8,31
119
41,6
2602
704
120
5,87
-
121
30,5
44,0
4,04
738
158
4,68
128
34,2
2702
783
134
5,82
-
135
37,8
49,0
5,00
831
180
4,63
144
43,4
3202
892
153
5,82
-
154
49,1
55,9
6,50
941
205
4,60
163
55,6
99
67
5000
1490
2050
6470
2
4
2
STEPS
25
R134a
138
44
589
158
121
30,5
738
8,42
128
34,2
662
180
748
205
135
37,8
154
49,1
831
8,32
941
8,26
144
43,4
163
55,6
99
67
5000
1490
2050
6590
2
2
4
STEPS
2
2
4
STEPS
25
R134a
138
44
25
R134a
138
70
99
67
5000
1490
2050
7370
4
5
-
3
1
2
Plant (side) cooling exchanger water (in/out) 12/7 °C
Source (side) heat exchanger water (in/out) 14/30 °C
Plant (side) heating exchanger water (in/out) 40/45 °C
Source (side) heat exchanger water (in/out) 14/7 °C
Plant (side) cooling exchanger water (in/out) 12/7 °C
Source (side) heat exchanger water (in/out) 30/35 °C
Plant (side) heating exchanger water (in/out) 40/45 °C
Source (side) heat exchanger water (in/out) 12/7 °C
Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certif ed units; in compliance with ISO 3744 for non-certif ed units
Average sound pressure level, at 10 (m.) distance, unit in a free f eld on a ref ective surface; non-binding value obtained from the sound power level
Standard configuration
Not available
ELCADOC - Ver. 0.9.9.17
7
ERACS2_WQ_0802_3202_201110_EN Ref.: R134a
ERACS2-WQ
4. OPERATING RANGE
Exch. water (in) (°C)
Exch. water (out) (°C)
Thermal difference (°C)
ERACS2-WQ ERACS2-WQ
Plant (side) cold heat exchanger Source (side) heat exchanger min
8 (1)
5 (1) (3)
3
Limits to exchanger water temperature are valid within the minimum - maximum water f ow range indicated in the Hydraulic Data section.
(1) Condenser water temp. 30/35 °C
(2) Evaporator water (in/out) 12/7 °C max
23 (1)
15 (1)
8 min
10 (2)
5 (1) (3)
3 max
51 (2)
55 (4)
8 min
ERACS2-WQ
Plant (side) hot heat exchanger
10 (2)
26 (2)
4 max
51 (2)
55 (4)
16
(3) With temperatures down to -8°C use anti-freeze mixtures. In case of lower temperatures, please contact our Sales Department.
(4) Valid for temperature of f uid the evaporator >= -3°C. In case of lower temperatures, please contact our Sales Department.
ETHYLENE GLYCOL MIXTURE
Ethylene glycol and water mixtures, used as a heat-conveying f uid, cause a variation in unit performance. For correct data, use the factors indicated in the following table.
cPf cQ cdp cPf: cooling capacity correction factor cQ: f ow correction factor cdp: pressure drop correction factor
0
0
1
1
1
-5
12%
0,985
1,02
1,07
-10
0,98
1,04
1,11
Freezing point (°C)
-15
0,974
1,075
1,18
-20
0,97
1,11
1,22
-25
20%
Ethylene glycol percentage by weight
30% 35% 40%
0,965
1,14
1,24
-30
45%
0,964
1,17
1,27
-35
50%
0,96
1,2
1,3
For data concerning other kind of anti-freeze solutions (e.g. propylene glycol) please contact our Sales Department.
FOULING FACTORS
Performances are based on clean condition of tubes (fouling factor =1). For different fouling values, performance should be adjusted using the correction factors shown in the following table.
Fouling factors
(m 2 °C/W) 4,4 x 10 -5
(m 2 °C/W) 0,86 x 10 -4
(m 2 °C/W) 1,72 x 10 -4 f1
1
0,96
0,93
Plant (side) cold heat exchanger fk1
1
0,99
0,98 fx1
1
0,99
0,98 f1 - f2 : capacity correction factors fk1 - fk2 : compressor power input correction factors fx1 - fx2 : total power input correction factors f2
0,99
0,98
0,97
Source (side) heat exchanger fk2
1,03
1,04
1,06 fx2
1,03
1,04
1,06
8 ERACS2_WQ_0802_3202_201110_GB HFC R134a
5. HYDRAULIC DATA
5.1 Water f ow and pressure drop
Water f ow in the heat exchangers is given by:
Q=Px0,86/Dt
Q: water f ow (m³/h)
Dt: difference between inlet and outlet water temp. (°C)
P: heat exchanger capacity (kW)
ERACS2-WQ
Pressure drop is given by:
Dp=K x Q² /1000
Q: water f ow (m³/h)
Dp: pressure drop (kPa)
K: unit size coeff cient
SIZE
1702
1902
2152
2502
2602
2702
3202
0802
1002
1102
1302
1502
K
5.0
3.8
3.8
2.7
18.8
28.5
28.5
17.5
12.1
12.1
2.7
2.7
Evaporator
Q min m 3 /h
Q max m 3 /h
18.7
22.9
49.9
61.0
26.4
31.4
35.9
40.7
46.1
53.7
62.7
67.8
75.6
86.1
70.5
83.8
95.7
108.6
122.9
143.1
167.2
180.9
201.5
229.5
W.c.
min m 3
1.51
1.86
2.14
2.54
2.90
3.31
3.74
4.31
5.04
5.44
6.08
6.92
Q min: minimum water f ow admitted to the heat exchanger.
Q max: maximum water f ow admitted to the heat exchanger.
W.c min: minimum water content admitted in the plant.
K
5.0
3.8
3.8
2.7
18.8
28.5
28.5
17.5
12.1
12.1
2.7
2.7
Condenser
Q min m 3 /h
11.3
13.9
16.0
19.0
21.7
24.8
28.0
32.3
37.8
40.8
45.6
51.9
Q max m 3 /h
45.4
55.7
64.1
76.1
86.9
99.3
112.2
129.4
151.2
163.3
182.3
207.6
5.0
3.8
3.8
2.7
Auxiliary heat exchanger
K
Q min m 3 /h
Q max m 3 /h
18.8
28.5
11.3
13.9
45.4
55.7
28.5
17.5
12.1
12.1
16.0
19.0
21.7
24.8
64.1
76.1
86.9
99.3
2.7
2.7
28.0
32.3
37.8
40.8
45.6
51.9
112.2
129.4
151.2
163.3
182.3
207.6
With
2 way valve
16.4
16.4
6.5
6.5
104
104
41.6
41.6
41.6
16.4
6.5
6.5
With
3 way valve
2.5
2.5
2.5
2.5
16.4
16.4
16.4
6.5
6.5
2.5
2.5
1.11
9 ERACS2_WQ_0802_3202_201110_GB HFC R134a
ERACS2-WQ
6. ELECTRICAL DATA
Maximum values
Size
0802
1002
1102
1302
1502
1702
1902
2152
2502
2602
2702
3202
2
2
2 n
2
2
2
2
2
F.L.I.
[kW]
2x32.6
2x40.5
2x48.7
2x51.7
2x64.3
2
2
2x70.2
2x82.1
2 1x82.1+1x100.7
2 1x100.7+1x111.6
2x111.6
2x127.3
2x145.3
C o m p r e s s o r
F.L.A.
[A]
2x55.4
2x67.1
2x80.4
2x91.7
2x104.7
2x114.9
2x131.7
1x131.7+1x164.6
1x164.6+1x183.5
2x183.5
2x208
2x235
L.R.A.
[A]
2x153
2x169
2x206
2x267
2x290
2x350
2x423
1x423+1x300
1x300+1x360
2x360
2x404
2x436
F.L.I.
[kW]
65.2
81
97.4
103.4
128.6
140.4
164.2
182.8
212.3
223.2
254.6
290.6
T o t a l u n i t ( 1 )
F.L.A.
[A]
110.8
134.2
160.8
183.4
209.4
229.8
263.4
296.3
348.1
367
416
470
193
212
S.A.
[A]
265.7
331.9
357.3
431
504.9
526.4
463.4
488.4
535.3
596.8
F.L.I. Full load power input at max admissible condition
F.L.A. Full load current at max admissible condition
L.R.A. Locked rotor amperes for single compressor
S.A. Inrush current
(1) Safety values to be considered when cabling the unit for power supply and line-protections
Power supply: 400/3/50
Voltage tolerance: 10%
Maximum voltage unbalance: 3%
Given the typical operating conditions of units designed for indoor installation, which can be associated (according to reference document IEC 60721) to the following classes:
- climatic conditions class AA4: air temperature range from 5 up to 42°C (*)
- special climatic conditions negligible
- presence of water class AD2: possibility of water dripping inside the technical room
- biological conditions class 4B1 and 4C2: negligible presence of corrosive and polluting substances
- mechanically active substances class 4S2: locations in areas with sand or dust sources
The required protection level for safe operation, according to reference document IEC 60529, is IP21 BW (protection against access of external devices with diameter larger than 12 mm and water falling vertically).
The unit can be considered IP21 CW protected, thus fulfilling the above operating conditions.
(*) for the unit’s operating limits, see “selection limits” section
10 ERACS2_WQ_0802_3202_201110_EN HFC R134a
7. FULL LOAD SOUND LEVEL
SIZE
63 125
SOUND POWER
ERACS2-WQ
250
Octave band [Hz]
500 1000 2000
Sound power level dB(A)
4000 8000
Total sound level
0802
1002
1102
1302
1502
1702
1902
2152
2502
2602
2702
3202
Working conditions
75
72
75
75
75
75
75
82
83
83
83
83
64
64
78
78
78
78
78
79
80
80
80
80
80
81
93
93
93
93
93
89
90
90
90
90
Plant (side) cooling exchanger water (in/out) 12/7 °C
Source (side) heat exchanger water (in/out) 14/30 °C
94
95
92
92
92
92
92
94
95
95
95
95
90
91
94
94
94
94
94
97
98
98
98
98
84
85
89
89
89
89
89
85
86
86
86
86
75
76
83
83
83
83
83
74
75
75
75
75
69
67
73
73
73
73
73
68
69
69
69
69
97
97
97
98
94
95
97
97
99
99
99
99
Sound power on the basis of measurements made in compliance with ISO 9614 and Eurovent 8/1 for Eurovent certif ed units; in compliance with ISO 3744 for non-certif ed units
Such certification refers specifically to the sound Power Level in dB(A). This is therefore the only acoustic data to be considered as binding.
SIZE
0802
1002
1102
1302
1502
1702
1902
2152
2502
2602
2702
3202
SOUND PRESSURE LEVEL
63 125 250
Octave band [Hz] at 10 m
500 1000 2000
Sound pressure level dB(A)
4000 8000
43
40
32
32
48
49
62
63
58
59
52
53
43
44
37
35
43
43
46
46
61
61
60
60
62
62
57
57
51
51
41
41
43
43
46
46
61
61
60
60
62
62
57
57
51
51
41
41
43
50
46
47
61
57
60
62
62
65
57
53
51
42
41
36
51
51
48
48
58
58
63
63
66
66
54
54
43
43
37
37
51
51
48
48
58
58
63
63
66
66
54
54
43
43
37
37
Working conditions
Plant (side) cooling exchanger water (in/out) 12/7 °C
Total sound level
65
65
65
66
62
63
65
65
67
67
67
67
Source (side) heat exchanger water (in/out) 14/30 °C
Average sound pressure level, at 10 (m.) distance, unit in a free f eld on a ref ective surface; non-binding value obtained from the sound power level.
Additional soundproofing
The sound power and pressure levels are reduced of 14 dB(A) when present the accessory “integral acoustical enclosure basic”and of 18 dB(A) when present the accessory “integral acoustical enclosure plus”.
ELCADOC - Ver. 0.9.9.17
11
ERACS2_WQ_0802_3202_201110_EN Ref.: R134a
ERACS2-WQ
8. DIMENSIONAL DRAWINGS
B
A
EVAPORATOR WATER INLET
EVAPORATOR WATER OUTLET
Size
0802
1002
1102
1302
1502
1702
REMARKS:
A
[mm]
3680
3680
3680
3680
3680
3680
DIMENSIONS AND WEIGHTS
ERACS2-WQ
B
[mm]
1170
H
[mm]
1950
1170
1170
1950
1950
1170
1170
1170
1950
1950
1950
P
[kg]
2420
2470
2880
3580
3690
3750
R1
[mm]
500
500
500
500
500
500
CLEARANCES (See fol. page)
R2
[mm]
500
500
500
500
500
500
R3
[mm]
800
800
800
800
800
800
R4
[mm]
500
500
500
500
500
500
RECOVERY WATER INLET
RECOVERY WATER OUTLET
WELL/TOWER WATER INLET
WELL/TOWER WATER OUTLET
MAIN ISOLATOR HANDLER
POWER INLET
For installation purposes, please refer to the documentation sent after the purchase-contract. This technical data should be considered as indicative. CLIMAVENETA may modify them at any moment.
A1
ERACS2_WQ_0802_3202_201002_GB HFC R134a
ERACS2-WQ
B
A
EVAPORATOR WATER INLET
EVAPORATOR WATER OUTLET
RECOVERY WATER INLET
RECOVERY WATER OUTLET
Size
1902
2152
2502
2602
2702
3202
REMARKS:
A
[mm]
3800
3800
3800
5000
5000
5000
Dimensions and weights
ERACS2-WQ
B
[mm]
1490
H
[mm]
1950
1490
1490
1490
1490
1490
1950
1950
2050
2050
2050
P
[kg]
4920
5310
5730
6470
6590
7370
R1
[mm]
900
900
900
900
900
900
Clearances (See fol. page)
R2
[mm]
900
900
900
900
900
900
R3
[mm]
1500
1500
1500
1500
1500
1500
R4
[mm]
900
900
900
900
900
900
WELL/TOWER WATER INLET
WELL/TOWER WATER OUTLET
LIFTING POINTS
MAIN ISOLATOR
POWER INLET
3 WAY VALVE
For installation purposes, please refer to the documentation sent after the purchase-contract. This technical data should be considered as indicative. CLIMAVENETA may modify them at any moment.
A2
ERACS2_WQ_0802_3202_201002_GB HFC R134a
ERACS2-WQ
SUPPORTING BASEMENT
Warning: Electrical power!
R1 R3
INSTRUCTIONS:
- Make sure that all the panels are f rmly f xed in place before moving the unit.
- Before lifting it, check the weight on the CE label.
- Use all, and only, the lifting points provided,
- Use slings of equal length,
- Use a spread-bar (not included)
- Move the unit carefully and avoid abrupt movements.
A3
ERACS2_WQ_0802_3202_201002_GB HFC R134a
ERACS2-WQ
SPREADER BAR
R4
SUPPORTING BASEMENT
R3
Warning: Electrical power!
INSTRUCTIONS:
- Make sure that all the panels are f rmly f xed in place before moving the unit.
- Before lifting it, check the weight on the CE label.
- Use all, and only, the lifting points provided,
A4
- Use slings of equal length,
- Use a spread-bar (not included)
- Move the unit carefully and avoid abrupt movements.
ERACS2_WQ_0802_3202_201002_GB HFC R134a
ERACS2-WQ
1702
1902
2152
2502
2602
2702
3202
EVAPORATOR
WATER INLET
ø
WATER OUTLET
ø
0802 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#)
1002 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#)
1102 UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#)
1302 FLEXIBLE JOINT 6” (4) FLEXIBLE JOINT 6” (4)
1502 FLEXIBLE JOINT 6” (4) FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
WITHOUT VALVES
-
-
-
-
-
-
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
CONDENSER
WATER INLET
2 WAY VALVE ø
DN 50
DN 50
DN 65
DN 65
PN 16
DN 65
PN 16
DN 65
PN 16
FLEXIBLE JOINT 3” (1)
FLEXIBLE JOINT 3” (1)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
3 WAY VALVE ø
DN 80
DN 80
DN 80
DN100
PN 16
DN100
PN 16
DN100
PN 16
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 5” (3)
FLEXIBLE JOINT 5” (3)
FLEXIBLE JOINT 5” (3)
FLEXIBLE JOINT 5” (4)
WITHOUT VALVES
-
-
-
-
-
-
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
WATER OUTLET
2 WAY VALVE ø
DN 50
DN 50
DN 65
DN 65
PN 16
DN 65
PN 16
DN 65
PN 16
FLEXIBLE JOINT 3” (1)
FLEXIBLE JOINT 3” (1)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
3 WAY VALVE ø
DN 80
DN 80
DN 80
DN100
PN 16
DN100
PN 16
DN100
PN 16
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 4” (2)
FLEXIBLE JOINT 5” (3)
FLEXIBLE JOINT 5” (3)
FLEXIBLE JOINT 5” (3)
FLEXIBLE JOINT 5” (4)
RECOVERY
WATER INLET
ø
WATER OUTLET
ø
UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#)
UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#)
UNI ISO 228/1 G 4 B (#) UNI ISO 228/1 G 4 B (#)
FLEXIBLE JOINT 6” (4) FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 6” (4)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
FLEXIBLE JOINT 8” (5)
(#) OPTIONAL FLANGED CONNECTIONS DN 100 PN16
(1) OPTIONAL FLANGED CONNECTIONS DN80 PN16
(2) OPTIONAL FLANGED CONNECTIONS DN100 PN16
A5
(3) OPTIONAL FLANGED CONNECTIONS DN125 PN 16
(4) OPTIONAL FLANGED CONNECTIONS DN 150 PN 16
(5) OPTIONAL FLANGED CONNECTIONS DN200 PN16
ERACS2_WQ_0802_3202_201002_GB HFC R134a
ERACS2-WQ
09. LEGEND OF PIPE CONNECTIONS
UNI ISO 228/1
Pipe threads where pressure-tight joints are not made on the threads - Designation, dimensions and tolerances
Used terminology:
G: Pipe threads where pressure-tight joints are not made on the threads
A: Close tolerance class for external pipe threads where pressure tight joints are not made on the threads
B: Wider tolerance class for external pipe threads where pressure tight joints are not made on the threads
Internal threads: G letter followed by thread mark
(only tolerance class)
External threads: G letter followed by thread mark and by A letter for A class external threads or by B letter for B class external threads
UNI ISO 7/1
Pipe threads where pressure-tight joints are made on the threads - Designation, dimensions and tolerances
Used terminology:
Rp: Internal cylindrical threads where pressure-tight joints are made on the threads
Rc: Internal conical threads where pressure-tight joints are made on the threads
R: External conical threads where pressure-tight joints are
made on the threads
Internal cylindrical threads: R letter followed by p letter
Internal conical threads: R letter followed by c letter
External conical threads: R letter
Designation
UNI ISO 7/1 - Rp 1 1/2
UNI ISO 7/1 - Rp 2 1/2
UNI ISO 7/1 - Rp 3
UNI ISO 7/1 - R 3
UNI ISO 228/1 - G 4 B
DN 80 PN 16
Description
Internal cylindrical threads where pressure-tight joints are made on the threads, def ned by standard UNI ISO 7/1
Conventional ø: 1 1/2”
Internal cylindrical threads where pressure-tight joints are made on the threads, def ned by standard UNI ISO 7/1
Conventional ø: 2 1/2”
Internal cylindrical threads where pressure-tight joints are made on the threads, def ned by standard UNI ISO 7/1
Conventional ø: 3”
External conical threads where pressure-tight joints are made on the threads, def ned by standard
UNI ISO 7/1
Conventional ø: 3”
Internal cylindrical threads where pressure-tight joints are not made on the treads, def ned by standard UNI 228/1
B tolerance class for external pipe threads
Conventional ø: 4”
Flange Nominal Diameter: 80 mm
Nominal Pressure: 16 bar
Note:
Conventional diameter value [in inches] identif es short thread designation, based upon the relative standard.
All relative values are def ned by standards.
As example, here below some values:
Conventional ø
Pitch
External ø
Core ø
Thread height
UNI ISO 7/1
1”
2.309 mm
33.249 mm
30.291 mm
1.479 mm
UNI ISO 228/1
1”
2.309 mm
33.249 mm
30.291 mm
1.479 mm
A6 ERACS2_WQ_0802_3202_201110_GB HFC R134a
10. CONDENSATION CONTROL DEVICES
ERACS2-WQ
2 WAY VALVE
Two way servo-motorized valve with steel body . The valve is selected for a thermical drop of 15°C and tested by Climaveneta during the unit’s test. recommended for applications with underground and superf cial water, where it’s better to work with inverter pumps and modulation of the extracted water f ow.
Pressure drop is given by:
Dp= K x Q 2 /1000
Q: water f ow (m
K: unit size ratio
3 /h)
Dp: pressure drop (kPa)
Size
0802
1002
1102
1302
1502
1702
1902
2152
2502
2602
2702
3202
16,4
16,2
6,50
6,50
6,50
6,50
DT 15 °C
K
104
104
41,6
41,6
41,6
16,4
3 WAY VALVE
3 way modulating valve in grey cast iron with diverting function.
The valve is selected for a thermic drop of 5°C and tested by
Climaveneta during the unit’s test. Recommended for geo-thermal applications, in which constant waterf ow is necessary.
Size
0802
1002
1102
1302
1502
1702
1902
2152
2502
2602
2702
3202
Pressure drop is given by:
Dp= K x Q 2 /1000
Q: water f ow (m
K: unit size ratio
3 /h)
Dp: pressure drop (kPa)
DT 5 °C
K
16,4
16,4
16,4
6,50
6,50
6,50
2,50
2,50
2,50
2,50
2,50
1,11
B1 ERACS2_WQ_0802_3202_201110_GB HFC R134a
ERACS2-WQ
11. VARIABLE FLOW SYSTEM (optional)
The energy consumption associated with fl uid circulation weighs heavily on the total operating costs of a large installation, especially when the units work at part load, and even more, when they are in stand-by. Under these conditions, although the power absorbed by the compressors and fans is reduced, the power consumed for water circulation remains high.
The ERACS2-WQ units permit reduction in system power consumption using inverter driven pumps. Energy savings are considerable and immediately evident, since a Δx reduction on the waterfl ow means an energy saving up to an amount of (Δx) 3 .
In the most advanced systems (see the simplifi ed model shown in the diagram below), the pumps insisting on the units become the pumps for the entire hydraulic circuit, and this eliminates the need to detach a primary circuit (constant fl ow) on the units and a secondary circuit (variable fl ow) on the plant.
This hydraulic separation was forced in the past, since the units weren’t designed to properly work with variable fl ow.
Now, thanks to the ERACS2-WQ units, plant designers need no longer worry about this limitation. The units have been designed to work with maximum effi ciency even with variable fl ow on the main heat exchangers; all the resources independently adjusts themselves in order to keep the outlet water temperature constant.
This important feature simplifi es the systems’ design and offers advantages in terms of both reductions in consumption and hydraulic circuit sizing. The integration of pumps + inverters in the unit permits signifi cant savings in space, circuit components, and system start-up times. To conclude, this innovative solution gives, beyond energy saving and running cost reduction, even advantages in the initial capital cost of the plant. The plant itself infact, is simplifi ed.
P
P
Example of a 2-pipe plant with a single hydraulic variable fl ow circuit
(pressure transducer and by-pass valve at costumer care)
C1 ERACS2_WQ_1602_3222_201110_EN HFC R134a
ERACS2-WQ
VARIABLE FLOW SYSTEM (optional)
11.1 VPF systems: plants designed with a single variable fl ow hydraulic circuit
Traditional plant
The two hydraulic circuits of the plant can be recognized: the hot and the cold one.
In the traditional solution, both of them are hydraulically splitted in a primary constant fl ow circuit (insisting on the units) and a secondary variable fl ow circuit dedicated to the plant’s fi nal utilities.
An element of the plant works to decouple the two circuits: when pumps user-side partialize according to the building’s requestes, it balances the all system by-passing the exceding fl ow to the unit.
The unit manages its own pumps as a function of its state (on/ off) balancing the operating hours between them.
On the other side, the plant’s inverter-pumps are managed through a differential pressure transducer: it reads the pressure drops variation on the circuit and traduce them in a power signal; this signal reports the percentage of load on the building and determines the pumps’ modulation.
“Smart” plant
In this advanced solution for plant’s design, both the cold and hot circuits are variable fl ow circuits.
The inverter-pumps insist on the cold and hot heat exchangers and are controlled directly by the unit’s W3000 controller.
The sophisticated algorithms developed by Climaveneta allow the direct power signals coming from the plant’s pressure transducer to be elaborated; this elaboration’s result is the pumps and by-pass valves control through voltage signals.
The complete control of all resources (compressors, fans, pumps and by-pass valves) ensures the maximum system’s effi ciency together with the highest reliability on the units.
P
P
P
P
P
P
P
P P
P
C2
Example of a 4-pipe plant with two single hydraulic variable fl ow circuits (pressure transducers and by-pass valves at costumer care)
ERACS2_WQ_1602_3222_201110_EN HFC R134a
ERACS2-WQ
VARIABLE FLOW SYSTEM (optional)
The “system VPF” option comprises:
- extensions on the controller to read the system’s pressure transducer signals (4-20 mA) and the consequent management of pumps and bypass valve (0-10 V signal)
- additional pressure transducer as extra safety device.
Pumps, differential pressure transducer on the farest pipe of the plant and by-pass valve are at customer charge.
Climaveneta provides only some indications for the plants design, as a function of the minimum waterfl ow on the primary heat exchanger.
Minimum waterfl ow to technical bulletin
[m3/h]
19 to 30 up to 37 up to 60 up to 95 up to 150 up to 230
Kvs
40
49
78
124
200
300
Recommended valve
VVG41.50
VVF31.65
VVF31.80
VVF31.90
VVF31.91
VVF31.92
Valve
DN50
DN65
DN80
DN100
DN125
DN150
2-way valve and minimum recommended bypass pipe diameter as a function of the minimum waterfl ow.
Valve motor
SKB60
SKB60
SKB60
SKC60
SKC60
SKC60
ByPass
DN50 (2”)
DN65 (2"½)
DN80 (3“)
DN100 (4“)
DN125 (5“)
DN150 (6”)
C3 ERACS2_WQ_1602_3222_201110_EN HFC R134a
ERACS2-WQ
VARIABLE FLOW SYSTEM (optional)
11.2 VPF.D systems: plants designed for variable fl ow, decoupled, primary and secondary circuits
Even in that cases in which is not possible to work with a single variable primary fl ow circuits, or in that situations in which is preferible to mantain decoupled the primary circuits (to the units) and the secondary circuit (to the plants), it’s possible the primary fl ow on pumps controlled by the unit.
The energy savings are lower than the solution with a unique
VPF system, but still important expecially when the units are in stand-by and it’s possible to reduce the waterfl ow through the unit up to 50%.
The VPF.D systems can be easily adopted in retrofi tt application, where the chiller is supposed to be replaced but not the plant.
The regulation is up to the unit’s controller, detecting the delta temperature at the primary heat exchanger: when the building’s load decreases, waterfl ow is reduced in order to mantain a fi xed delta T between the exchangers’ inlet and outlet.
The VPF.D system by Climaveneta assures even the waterfl ow balancing between primary and secondary circuit, in order to avoid the fl ow inversion in the decoupling pipe.
Traditional plant “Smart” plant
P
P
P
P
P
P
T2
T2
T1
T1
P
P
P
P
P
P
Example of a 4-pipe plant with cold and hot circuits hydraulically separated in a primary and a secondary ones, both of them featuring variable fl ow
The “system VPF.D” option comprises:
- extensions on the controller to read the temperature probes and to drive properly the inverter-pumps (0-10 V signal)
- additional pressure transducer on the heat exchangers as extra safety device.
The variable fl ow pumps are at customer care.
C4 ERACS2_WQ_1602_3222_201110_EN HFC R134a
ERACS2-WQ
VARIABLE FLOW SYSTEM (optional)
Climaveneta provides in the table below some indications for the plants design, as a function of the nominal waterfl ow on the primary heat exchanger.
NOTE: temperature probes are separately supplied
Minimum waterfl ow to technical bulletin
[m3/h]
25 to 40 up to 60 up to 100 up to 150 up to 225 up to 375
Decoupling pipe
2"½
3"
4"
5"
6"
8"
Minimum decoupling pipe diameter as a function of the minimum waterfl ow
C5 ERACS2_WQ_1602_3222_201110_EN HFC R134a
ERACS2-WQ
12. HYDRAULIC CONNECTIONS RECOMMENDED
Protect the hydraulic circuit with antifreeze when shutting down a charged system for winter. If necessary, drain the water inside the exchangers.
It is absolutely essential that, in the presence of dirty and/or aggressive water, an intermediate heat exchanger is placed upstream of the refrigeration system heat exchangers.
The connecting pipes must be properly supported so as not to weigh on the unit.
12.1 Hydraulic connections with hot and cold heat exchanger plant side
The following must be installed on the heat exchanger hydraulic circuit (see Fig.):
•
•
•
•
Two pressure gauges with a suitable range (inlet - outlet)
Two service cocks for the pressure gauges.
Air bleed valves to be fi tted to the highest points of the circuit.
Two vibration damping joints (inlet - outlet) positioned horizontally.
• One fl ow switch to be fi tted at the unit outlet in a linear stretch of a length of about 7 times the diameter of the pipe itself. The fl ow switch must be calibrated so as to guarantee a minimum water fl ow to the heat exchangers, not less than the value indicated in the unit bulletin or declared by the supplier. If this value is not available, calibrate the fl ow switch to 70% of the rated water fl ow of the unit (not envisaged for desuperheaters).
• A calibration valve at the outlet.
• Two shut-off valves (inlet - outlet).
• A mechanical fi lter with a maximum mesh size of 1 mm to be fi tted as near as possible to the heat exchanger inlet
• A drain cock to be fi tted in the lowest point of the hydraulic system.
• A circulation pump.
• All other equipment listed in Fig.
The directions for installation set out above represent a necessary condition for the validity of the guarantee.
However, Climaveneta is willing to examine any different needs, which must in any case be approved before the refrigeration system is started up.
A Unit
B Tank
C Reintegration
D Use
1.
2.
3.
4.
Pressure gauge
Shut-off valve
Automatic air valve
Vibration damping joint
D1
5.
6.
Flow switch
Calibration valve
7.
8.
Shut-off valve
Filter
9. Drain valve
10. Primary circuit circulation pump
11. Safety valve
12. Expansion tank
ERACS2_WQ_0802_3202_201110_EN HFC R134a
Climaveneta S.p.A.
Via Sarson 57/c
36061 Bassano del Grappa (VI)
Italy
Tel +39 0424 509500
Fax +39 0424 509509 [email protected] www.climaveneta.com
Climaveneta France
3, Village d’Entreprises
ZA de la Couronne des Prés
Avenue de la Mauldre
78680 Epone
France
Tel +33 (0)1 30 95 19 19
Fax +33 (0)1 30 95 18 18 [email protected] www.climaveneta.fr
Climaveneta Deutschland
Rhenus Platz, 2
59439 Holzwickede
Germany
Tel +49 2301 91222-0
Fax +49 2301 91222-99 [email protected] www.climaveneta.de
Climaveneta
Espana - Top Clima
Londres 67, 1° 4°
08036 Barcelona
Spain
Tel +34 963 195 600
Fax +34 963 615 167 [email protected] www.climaveneta.com
Climaveneta Chat Union
Refrig. Equipment Co Ltd
88 Bai Yun Rd, Pudong Xinghuo
New dev. zone 201419 Shanghai
China
Tel 008 621 575 055 66
Fax 008 621 575 057 97
Climaveneta Polska Sp. z o.o.
Ul. Sienkiewicza 13A
05-120 Legionowo
Poland
Tel +48 22 766 34 55-57
Fax +48 22 784 39 09 [email protected] www.climaveneta.pl
Climaveneta India
Climate Technologies (P) LTD
#3487, 14th Main, HAL 2nd stage,
Indiranagar, Bangalore 560008
India
Tel +91-80-42466900 - 949
Fax +91-80-25203540 [email protected]
Climaveneta UK LTD
Highlands Road,
Shirley Solihull
West Midlands B90 4NL
Tel: +44 (0)871 663 0664
Fax: +44 (0)871 663 1664
Freephone: 0800 801 819 [email protected] www.climaveneta.co.uk
www.climaveneta.com
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