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Page13of56
RG66006951‐Rev.01
Refrigerantsidecycleinversionvalve Heat‐transferfluidsidecycleinversionvalve
1.3.5 Electronically controlled electric expansion valve
Theelectronicallycontrolledvalvewithexternalequalisationandbuilt‐inMOPfunctionismanagedbythesoftwareand
therefore makes cooling circuit operationveryefficient,stabilising and decreasing the power absorbed by the system
whenasuddenthermalloadvariationoccurs.Theshutterinthecentralpartoftheval
vecanalwaysslideverticallywith
anamplestrokeallowing variationofthedegreeofopeningoftheorificeofthefluidpassage.Usingthisvalvereduces
compressor energy consumption when the surrounding conditions bring the pressure difference between the
evaporatorandtheairconditionerbelow5bar,thusimprovingperformance.
Содержание
- Contents 3
- Declaration of conformity 4
- 2 3 4 5 5
- General description 5
- Lew 072 cs 5
- Lew reversible water chillers and heat pumps are air or process fluid conditioning units designed for both domestic and industrial use and in operation 24 hours a day they cover a thermal output range from 40 to 429 kw guaranteeing a high level thermodynamic performance and a wide range of configuration possibilities both in accessories and cooling circuit lew machines have been built in a fully faired framework to make the assembly extremely silent they can therefore be installed in open environments without needing to be closed off the all new new rounded off shape enhances their appearance the exclusive use of r410a refrigerant and of high quality components in the chiller hydraulic and electrical parts makes the lew units state of the art chillers in terms of efficiency reliability and emitted sound output 5
- Lew units 5
- Page 5 of 56 rg66006951 rev 1 5
- Product configurations the series of lew models consists in a wide range of products meeting all system needs lew c water chillers cold water only lew d water chillers cold water only interlocked by dry cooler or evaporative turret lew h water heat pumps chiller side reversible water lew w water water only heating heat pumps all the above mentioned versions are available in sizes referred to in the table below the sizes of the lew units are expressed in the x coordinates of the table in terms of rated cooling capacity kw obtained in conditions with chilled water produced at 7 c and combined with the evaporative turret with dissipation circuit water at 29 inlet and 35 outlet table i table summarising the range of lew products by size and efficiency pack 5
- The first column of table i shows the available efficiency packs these determine the configuration of the cooling circuit for further details see paragraph 1 cooling circuit for example the size lew 2 090 develops a 90 kw chiller output and is implemented with efficiency pack 2 two compressors one cooling circuit the dimensions of the frames of the units are listed in the cells by means of reference symbols f1 f2 f3 with increasing dimensions all the information concerning the weight of the machines and the dimensions corresponding to each frame is available in paragraph 2 overall dimensions and weight all sizes of the lew series can be implemented with the standard s set up or the l soundproof set up covering the compressor and outer panelling with soundproof material the lew units are identified with the following symbol 5
- Configuration and accessories 6
- Identification symbol of hiref model e g lew unit 1 identification symbol of hiref model e g lew unit 2 unit sizes expressed in rated chilling output x10 kw e g 70 kw 3 efficiency pack cooling circuit and compressor layout e g efficiency pack 2 4 machine version e g c chiller 5 machine execution e g s soundproofing not available 6
- List of options 6
- List of standard features 6
- Page 6 of 56 rg66006951 rev 1 6
- Field of application lew units are designed for cooling heating water and solutions containing up to 30 glycol percentage by weight in civil industrial and technological air conditioning systems the units cannot operate outdoors as the metalwork provides an ip43 insulation please contact the technical office for these applications 7
- Lew multifunction machines have 4 water connections associated with two different water circuits for 2 pipe systems lew multifunction machines have 4 water connections associated with two different water circuits for 2 pipe systems circuit 1 production of cold or hot water for utility circuit 2 production of hot or cold water for dissipation in opposition to the utility accordingly the multifunction units have 2 heat exchangers plate heat exchanger 1 with both evaporation and condensation function intended for the utility circuit plate heat exchanger 2 with both evaporation and condensation function intended for the dissipation circuit cooling lew machine view of the water connections and of the thermodynamic circuit for the correct direction of the connections always refer to the dimensional drawing attached with the documentation 7
- Lew series units must be used within the operating limits shown in this document or the warranty required by the sales contract will be voided 7
- List of accessories 7
- Page 7 of 56 rg66006951 rev 1 7
- Cooling circuit 10
- Structure 10
- Electric panel 18
- Lew cs cl 41 42 51 52 61 62 71 72 81 82 19
- Lew cs cl 91 92 111 112 131 132 141 142 144 19
- Main units technical data 19
- Page 19 of 56 rg66006951 rev 1 19
- Rated technical data of lew water chillers 12 7 c 15 30 c 19
- The following chapter provides the technical data for the lew unit performance values are accurately reported and can be interpolated to know specific operating conditions table i technical data of lew chillers in standard operating conditions 19
- Lew cs cl 161 162 164 181 182 184 204 214 20
- Lew cs cl 243 244 283 284 314 344 374 424 484 20
- Page 20 of 56 rg66006951 rev 1 20
- Rated technical data of lew water chillers 12 7 c 15 30 c 20
- Lew ds dl 41 42 51 52 61 62 71 72 81 82 21
- Lew ds dl 91 92 111 112 131 132 141 142 144 21
- Page 21 of 56 rg66006951 rev 1 21
- Rated technical data of lew water chillers 12 7 c 40 45 c 30 glyc 21
- Lew ds dl 161 162 164 181 182 184 204 214 22
- Lew ds dl 243 244 283 284 314 344 374 424 484 22
- Page 22 of 56 rg66006951 rev 1 22
- Rated technical data of lew water chillers 12 7 c 40 45 c 30 glyc 22
- Lew hs hl lew ws wl 41 42 51 52 61 62 71 72 81 82 23
- Lew hs hl lew ws wl 91 92 111 112 131 132 141 142 144 23
- Page 23 of 56 rg66006951 rev 1 23
- Rated technical data of lew heat pumps 15 10 c 40 45 c 23
- Table ii technical data of lew heat pumps in standard operating conditions table ii technical data of lew heat pumps in standard operating conditions 23
- Lew hs hl lew ws wl 161 162 164 181 182 184 204 214 24
- Lew hs hl lew ws wl 243 244 283 284 314 344 374 424 484 24
- Page 24 of 56 rg66006951 rev 1 24
- Rated technical data of lew heat pumps 15 10 c 40 45 c 24
- 30 15 30 20 30 30 35 35 40 40 45 10 30 15 30 20 30 25
- All the data in the paragraph refers to δt 5 c on the evaporation and condensation side pf chiller power kw pa absorbed power kw in order to calculate the thermodynamic eer and cop factors take the pf pa ratio the performance was calculated with different glycol percentages in a solution even though from a thermodynamic point of view with up to 30 of glycol in a solution there is a minor performance drop nonetheless refer to paragraph 4 use of glycol solutions for further information table iii performance of lew c d h units with cold water production mode 25
- Lew c lew c lew d lew h 25
- Page 25 of 56 rg66006951 rev 1 25
- Performance of lew c d h w heat pump units 25
- 35 40 45 50 55 26
- In the heat pump performance calculation in 5 0 evaporator conditions a 10 glycol mixture was used on the dissipation side in 0 5 conditions a 25 glycol mixture was used table iv performance of lew h w units in heat pump mode 26
- Lew h lew w lew h lew w 26
- Page 26 of 56 rg66006951 rev 1 26
- Page 27 of 56 rg66006951 rev 1 27
- Chiller hs heat pump ws hot only 28
- Cs chiller cs chiller ds dry cooler 28
- Noise emission 28
- Overall dimensions and weight of the main units 28
- Page 28 of 56 rg66006951 rev 1 28
- Table v sound emissions for lew lw models sound power lp sound pressure 28
- The lew product range consists of different frames the overall drawings of the lew models are reported in the following paragraph they can be referred to by consulting the identification codes reported in the tables in this paragraph the tables below report the weights reference drawings and overall dimensions of all the lew models table vi weight and reference drawings of the main units of the lew range with reference to their frames 28
- Page 29 of 56 rg66006951 rev 1 29
- Table vii overall dimensions of the frames of the main units f_ table vii overall dimensions of the frames of the main units f_ 29
- Overall drawings of the main units 30
- Characteristic curves of the hydraulic pumps associated to the units 39
- Technical data of optional hydronic modules 39
- Page 40 of 56 rg66006951 rev 1 40
- Page 41 of 56 rg66006951 rev 1 41
- Page 43 of 56 rg66006951 rev 1 43
- Optional hydronic module optional hydronic module 45
- Overall dimensions and weight of optional hydronic modules 45
- Page 45 of 56 rg66006951 rev 1 45
- Table vii overall dimensions of the frames of the main units f_ and optional hydraulic modules m_ used in the lew range 45
- The tables below list the weights reference drawings and overall dimensions of all optional hydronic modules the overall drawings of the optional modules are reported in the following paragraph they can be referred to by consulting the identification codes reported the tables in this paragraph table viii weight and reference drawings of optional modules with reference to the dimensions of the relative main unit and whether or not there is a water side cycle inversion valve 45
- With pumps 45
- Overall drawings of optional hydronic modules 46
- Installation 50
- Installation clearance requirements 50
- Ns sh cc v 50
- Volume of water in the system 50
- Operating limits 52
- Water flow to evaporator 53
- Working limits 53
- Calibration of control devices 54
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