FLOOR HEATING VALSIR.pdf

Full text

(1)Technical manual L02-242/1. QUALITY FOR PLUMBING. Floor heating and cooling system Characteristics, planning, dimensioning, laying and testing Energy saving. Low operating temperature. Elevated thermal well-being. Uniform temperature distribution. www.valsir.it.

(2) 1. Characteristics of floor heating systems. 6. 1.1. Hygienic conditions . 6. 1.2. Aesthetical advantages. 6. 1.3. Well-being. 6. 1.3.1 What is comfort or thermo-hygrometric well-being? 1.3.2 Measurement of comfort 1.3.3 Causes of discomfort. 6 6 8. Energy saving . 9. 1.4. 1.4.1 1.4.2 1.4.3 1.4.4 1.4.5. 2. Why does floor heating reduce energy consumption? Floor insulation Operating temperature Reduced stratification of the air temperature System water at low temperature. COMPONENTS CATALOGUE. 9 9 10 11 11. 12. 3 Technical characteristics of the components. 31. 3.1. PEXAL and MIXAL pipe. 31. 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9 3.1.10 3.1.11 3.1.12 3.1.13 3.1.14 3.1.15. 31 33 33 33 34 34 34 35 35 36 36 36 39 43 46. 3.2. 3.3. 3.4. General characteristics Characteristics of crosslinked polyethylene PE-Xb Characteristics of aluminium Mechanical behaviour Expansion Resistance to abrasion, encrustation and corrosion Barrier to oxygen and UV rays Lightweight Sound absorption Long lasting Heat conductivity Comparison of heat outputs of different pipes Pressure losses Quality control Pipe approvals. V-ESSE, V-ELLE, V-ZETA, V-ERRE and V-ENNE insulation panels. 48. 3.2.1 3.2.2 3.2.3. 3.2.4. 3.2.5. 3.2.6. 48 50 52 54 56 58. V-ESSE panel V-ELLE panel V-ZETA panel V-ERRE panel V-ENNE panel Instructions for laying the V-ENNE eco-compatible system. V-ACUSTIC soundproof mat. 60. 3.3.1 3.3.2 3.3.3 3.3.4. 60 60 62 66. Introduction Technical characteristics Soundproof insulation of foot-traffic noise with V-ACUSTIC Rules for the installation of V-ACUSTIC. Distribution manifold. 68. 3.4.1 Manifold components 3.4.2 Practical method for adjusting and balancing of the manifold 3.4.3 Composition of the manifold (without mixing kit). 68 70 71.

(3) 3.5. Valsir mixing kit. 73. 3.5.1 3.5.2 3.5.3 3.5.4 3.5.5. 73 75 77 78 79. V-MIX02 fixed point mixing kit V-MIX01 fixed point and variable point mixing kit Theory: adjustment of the mixing kit Practice: adjustment of the mixing kit The assembled mixing kit . 3.6. V-BOX modules. 82. 3.7. Mixing and distribution groups for heating plants. 85. 3.7.1 3.7.2 3.7.3 3.7.4 3.7.5. 86 94 95 97 107. 3.8. 3.9. 3.10. The distribution and mixing modules Differential valve Distribution manifolds Hydraulic separator Dimensioning of the mixing groups. V-DRYAIR isotherm dehumidifiers for cooling systems . 112. 3.8.1 Condensation and the dehumidification of air 3.8.2 V-DRYAIR 250V and V-DRYAIR 250H isotherm dehumidifiers 3.8.3 V-DRYAIR 450H isotherm dehumidifers 3.8.4 V-DRYAIR 900H isotherm dehumidifiers. 112 113 115 116. Control systems. 118. 3.9.1 V-CLIMA system 3.9.2 Control units of the heating circuits 3.9.3 Some control schemes . 118 127 138. Concrete fluidizer. 144. 3.10.1 Calculation of the quantity of fluidizer. 144. 4. Valsir floor heating and cooling systems. 146. 4.1. System and system components. 146. 4.2. Guidelines for choosing the system and its components. 156. 5 Dimensioning of floor heating systems in compliance with UNI EN 1264. 162. 5.1. Introduction. 162. 5.2. Dimensioning: theory. 162. 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.2.6 5.2.7 5.2.8 5.2.9 5.2.10 5.2.11 5.2.12. 162 165 166 166 167 167 168 168 169 169 170 170. 5.3. Layer composition of the floor Required thermal flow Characteristic curves Thermal flow limit and maximum floor temperature Limit curve Supply temperature Average floor temperature Downward heat dispersion Length of heating loops Flow and temperature of heating fluid Design limits in the choice of pipe spacing Balancing of heating circuits. Dimensioning: practice. 171. 5.3.1 5.3.2 5.3.3 5.3.4. 173 174 175 176. Floor layer composition Required thermal flow Thermal flow limit and maximum floor temperature The characteristics curves and the limit curve.

(4) 5.3.5 Supply temperature 5.3.6 Circuit dimensioning 5.3.7 Balancing of heating circuits . 177 178 180. 6 Dimensioning of anti-snow and anti-ice systems (snow-melt). 187. 6.1. Introduction. 187. 6.2. System types. 188. 6.3. System design. 189. 6.4. Dimensioning: theory. 190. 6.4.1 6.4.2 6.4.3 6.4.4 6.4.5 6.4.6 6.4.7. 190 192 193 193 193 194 195. 6.5. The required thermal output Layer composition of the radiant panel Calculation of temperatures Downward specific heat output Calculation of the number of loops Calculation of the flow rates and the temperatures of the heating fluid Typical snowmelt systems. Dimensioning: practice. 196. 6.5.1 6.5.2 6.5.4 6.5.5 6.5.6. 196 196 196 197 197. Required heat output Layer composition of the radiant panel Downward specific thermal output Calculation of circuit loops Calculation of the flow and the temperature of the heating fluid. 7 Installation. 204. 7.1. Preliminary procedures and verifications. 204. 7.2. Installation of the manifold and mixing kit. 204. 7.3. Laying of the edging strip. 205. 7.4. Laying of insulation panels. 205. 7.5. Laying the pipe. 207. 7.6. Creation of expansion joints. 208. 7.7. Creation of the settlement joints. 209. 7.8. System filling. 210. 7.9. System testing. 210. 7.10. Laying of the screed. 210. 7.11. System commissioning. 210. 8 Appendix. 211. A. Heat transfer. 211. A.1 A.1.1 A.1.2 A.1.3 A.2 A.3 A.3.1 A.3.2 A.3.3. 211 211 211 212 212 214 214 214 214. Heat transfer modes Conduction Convection Radiation Combined heat transfer processes Heat transfer in heating systems Radiator systems Fan heater systems Floor heating systems .

(5) B. Climatic data for Italian regions and towns. 215. C. Thermal conductivity and resistance of materials. 218. D. Wood as a floor covering. 220. E. dimensioning of metal reinforcement in the floors. 221. E.1. 222. Dimensioning example of a metal reinforcement. F. Antifreeze liquid in heating systems. 223. G. Calculation of quantity of concrete. 224. H. Insulation panels in floor heating. 227. H.1 H.1.1 H.1.2 H.2 H.2.1 H.2.2 H.3. 227 227 227 228 228 229 231. I. The influence of insulation panels on system performance Mechanical function Reduction of thermal mass Numerical analysis of insulation Calculation basis Results Conclusion. Noise in the buildings. 232. I.1 I.2 I.3 I.4 I.5. 232 232 234 236 238. Introduction Sound Noise and its measurement Noise in buildings and Italian legislation Foot traffic noise. L. Heat outputs. 239. M. Measurement units. 240. N. Standard and legislative references. 243. O. Technical specifications. 244.

(6) 1. Characteristics of floor heating systems. 1. Characteristics of floor heating systems. The first evidence of floor heating dates back to Roman times. The working principles were straightforward but ingenious; an underground fire was made and the hot fumes were conveyed through ducts under the floor of the building. It was only after the war that the first floor heating systems were installed with the use hot water that ran through pipes that were embedded in the floor; unfortunately the poor insulation of the buildings, the high temperatures and the lack of adequate control systems caused this type of system to lose popularity for quite some time. The energy crisis of the seventies, however, and the issuing of European laws on thermal insulation resulted in the return of this type of heating. Floor heating is, today, certainly the most technically valid solution offered by the heating market for the residential, commercial and industrial sector. The various solutions available allow maximum flexibility and adaptability to all types of building and construction requirements. Furthermore, the use of a heat transfer fluid at low temperatures and the particular stratification of the heat in the room results in significant energy saving. In the following paragraphs we will analyse some of the characteristics that differentiate floor heating systems: hygienic conditions, aesthetical advantages, well-being and energy conservation.. 1.1 Hygienic conditions Floor heating naturally rules out the formation of damp areas on the floor, conditions favouring dust mites and bacteria are therefore not generated and there will also be no formation of mildew. Unlike traditional systems, there is no combustion of motes, which provoke a dry and irritated throat and there are no convective currents, which favour the transport of dust in the room.. 1.2 Aesthetical advantages There are no limits of an architectural nature linked to the presence of heating units; therefore, there is total freedom in interior decorating. By eliminating the problem of condensation and mildew, there will be no deterioration of wooden floors or windows and frames. Traditional heating systems limit the space available for the distribution of furniture whereas floor heating systems allow all available space to be utilised; it is also advantageous in buildings of an architectural and artistic importance where it is essential that the surroundings be left unaltered.. 1.3 Well-being 1.3.1 What is comfort or thermo-hygrometric well-being? The objective definition defines thermo-hygrometric comfort as the state of thermal neutrality of the human body in which its thermal accumulation is zero and in which the organism maintains its mechanisms of thermoregulation (absence of perspiration in hot rooms or shivers in cold rooms) and vasomotor thermoregulation (absence of blood vessel dilation and contraction) almost inactive. The subjective definition defines thermo-hygrometric comfort as the physical and psychological state of satisfaction that an individual feels because of the conditions in which he finds himself (temperature, humidity, air velocity, etc.). The human body produces thermal energy based on the activity being carried out. A person when sedentary produces 100 W whereas under strain can produce 1000 W and this thermal energy must be dispersed to maintain the temperature under control and to avoid situations of thermal stress (discomfort). The human body is therefore a thermo-dynamic machine that exchanges energy (heat and work) with the atmosphere and in which the energy balance must be maintained, where the latent component of heat connected to evaporation and breathing and the dormant component of heat exchanged by convection and radiation, intercede.. 1.3.2 Measurement of comfort Thermo-hygrometric well-being depends on several parameters: ■■ the energetic metabolism M that depends on the activity carried out and is measured in W/m2 (body surface) or in met (1 met = 58,2 W/m2), ■■ the thermal resistance of clothing Icl expressed in m2K/W or in clo (1 clo = 0,155 m2K/W), ■■ he air temperature Ta measured around the person, ■■ the average radiant temperature Tmr caused by the room where the person is found, ■■ relative air velocity va, ■■ relative air humidity UR. One method of identifying the conditions of well-being is to express it by means of the PMV (Predicted Mean Vote) that is based on the balance of thermal energy in the human body. Man is equilibrated when the thermal energy generated inside the body is equal to the thermal energy dispersed into the room. The PMV is therefore a function of the six parameters described and expresses the average vote of a sample of people in various climatic conditions. 6.

(7) Table 1.1 Values of PMV.. Sensation. Very hot. Hot. Slightly hot. Neutral. Slightly cold. Cold. Very cold. PMV. +3. +2. +1. 0. -1. -2. -3. The PMV therefore predicts the average vote of thermal sensation expressed by a considerable number of people. The PPD (Predicted Percentage of Dissatisfied) is, on the other hand, an indicator that predicts the number of people that will be dissatisfied from a thermal point of view for a certain PMV value.. Characteristics of floor heating systems. Figure 1.1 Relationship between PMV and PPD. 100%. SATISFIED. 90% 80% 70%. PPD. 60% 50% 40% 30%. DISSATISFIED. 20% 10% © 2008 Valsir S.p.A.. -3,0 -2,8 -2,6 -2,4 -2,2 -2,0 -1,8 -1,6 -1,4 -1,2 -1,0 -0,8 -0,6 -0,4 -0,2 0,0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0 2,2 2,4 2,6 2,8 3,0. 0%. PMV. According to this theory, climatic conditions are considered pleasant when they correspond to a percentage of satisfied people greater than 90% and therefore a percentage of dissatisfied people below 10%. Such conditions are summarized in the following table. Table 1.2 Conditions considered pleasant.. Metabolism. M. 0,8÷4 met. Clothing. Icl. 0÷2 clo. Air temperature. Ta. 10÷30°C. Mean radiant temperature. Tmr. 10÷40°C. Relative air velocity. va. 0÷1 m/s. Relative air humidity. UR. 30÷70%. As an alternative to the PMV index it is possible to use other indicators such as, for example, the operating temperature. This represents the uniform temperature of a room in which the subject exchanges the same energy by convection and radiation that effectively exchanges in the real room in which the temperature is not distributed uniformly. The operating temperature is the weighed average if the air temperature and the average radiant temperature, the weights of which are convective conductance (clothes-air) and radiative conductance (clothessurfaces of the room). Top =. 1. hc · Ta + hr · Tmr hc + hr. This temperature is in reality also a function of the air velocity in that the coefficient of convective conductance is strongly linked to this parameter. The Standard UNI EN ISO 7730 suggests a simplified formula for calculating the operating temperature: Top = A · Ta + (1-A) · Tmr where A is a function of the relative air velocity va.. 7.

(8) Table 1.3 Coefficient A as a function of air velocity.. 1. va [m/s]. <0,2. 0,2÷0,6. 0,6÷1,0. A. 0,5. 0,6. 0,7. The operating temperature is also defined as the total dry temperature perceived; it is the combination of the two temperatures which cannot take on infinite combinations but generally remain within the fields of values depending on the heating/cooling system as shown.. Characteristics of floor heating systems. Table 1.4 Relation between the air temperature and the mean radiant temperature.. Winter conditions. Radiant panels. Tmr > Ta. ∆T = 1÷3°C. Summer conditions. Radiant panels. Tmr < Ta. ∆T = 1÷2°C. Winter conditions. Radiators, fan-coils, ducts. Tmr < Ta. ∆T = 3÷6°C. Summer conditions. Radiators, fan-coils, ducts. Tmr > Ta. ∆T = 4÷6°C. We immediately notice that with radiant panel technologies the difference between the temperature of the air and the temperature of the surfaces is lower than the difference in temperature with traditional heating/cooling technologies. Furthermore, with an analysis of winter conditions only, it can be noted that with radiant panel systems, the temperature of the air can be lower than the temperature of the surfaces and this translates into interesting consequences for energy saving. By intersecting the field of acceptability of the PMV with the values of operating temperature, in the case of sedentary activity M≤1.2 met, we find that the values that ensure comfort, are the following: 20°C < Top < 24°C in winter conditions (clothing 1 clo); 23°C < Top < 26°C in summer conditions (clothing 0.5 clo).. 1.3.3 Causes of discomfort The causes that can generate local discomfort are several and depend also on the type of heating/cooling system. Figure 1.2 Causes of local discomfort.. vm. Tr. Ta Tr. © 2008 Val. sir S.p.A.. Tf. Vertical temperature differences are too high. A higher temperature at the height of the head compared to the temperature at the height of the ankles generates a greater local discomfort that will increase with an increase in the temperature difference; the Standard UNI EN ISO 7730 establishes a maximum temperature difference of 3°C. Floor too hot or too cold. The Standard UNI EN 1264 that regulates floor heating systems has in fact established the surface temperature limits (see chapter on floor system dimensioning). Mean radiant temperature distributed in an asymmetrical manner. There will be greater sensations of discomfort when the irregularity is caused by a heated ceiling or by cold walls (windows). Air drafts. The sensation of discomfort caused by the air velocity is linked to its temperature. An air draft in the presence of low temperatures can generate sensations of discomfort while in the presence of elevated temperatures it is beneficial on a comfort level.. 8.

(9) 1.4. Energy saving. 1.4.1 Why does floor heating reduce energy consumption?. 1.4.2 Floor insulation 1) Floor heating systems are characterised by the presence (required by the European Standard UNI EN 1264) of a layer of insulation to support the loops. Pocketed or smooth panels can used to create the insulation layer that has a minimum thickness of approximately 20 mm. 2) The function of the insulation, besides acting as a mechanical support for the pipe is also to act as a thermal insulation for the rooms below and to reduce the thermal inertia of the system. 3) The presence of insulation panels in floor heating systems halves downward heat loss as compared with systems without insulation panels. If we consider a room that lies directly over the ground, the dispersion in a system with insulation panels is about 19%, while in a system that has no insulation panels, dispersion can be as high as 36%! Figure 1.3 Insulation with V-ESSE pocketed panels.. 9. 1. CHARACTERISTICS OF FLOOR HEATING SYSTEMS. Systems with radiant panels, as compared with traditional heating systems, allow an average energy saving of more than 20% at equal environmental temperatures. The reasons for this marked saving are due to the fact that the large exchange surface formed by the floor allows the room to be heated with a heat transfer fluid that runs at low temperatures. For this reason, it is convenient to use heat sources whose performance increases when run at low temperatures (heat pumps, condensation boilers, solar panels, heat recovery systems, district heating systems). The thermal gradient that is generated with a floor heating system is such that the heat losses are less as compared with a traditional heating system. This is because, unlike traditional systems, it is possible to recover the heat that is usually wasted due to the effect of air stratification that reaches higher temperatures at the ceiling; this heat recovery increases with the increase in the height of the room. With a floor heating system the condition of well-being is reached with an average room temperature that is generally 1°C lower as compared with traditional heating systems and therefore, at equal comfort it is possible to reduce energy consumption. The employment of insulation panels that are required to support the pipe but at the same time significantly reduce heat losses help increase the output of the system; traditional heating systems do not require panels and therefore such panels are never employed..

(10) 1.4.3 Operating temperature. Characteristics of floor heating systems. 1. The air temperature Ta and the mean radiant temperature Tmr of the structures determine the operating temperature Top. The latter indicates the conditions of well-being of an individual. In a floor heating system, the mean radiant temperature of the structures is greater than the temperature of the structures where a traditional heating system has been installed and this allows a reduction in the temperature of the air. The thermal exchange with the outside is directly proportionate to the difference in temperature between the room air temperature and the outside temperature. In a traditional system (see Figure 1.4) the mean temperature of the air is higher with a consequently higher thermal outward flow compared to a system with radiant panels where the mean temperature of the air is lower. In fact, in a system with panels the temperature in proximity with, for example, the glassed surfaces is lower and this allows a reduction in the thermal flow lost to the outside environment (see Figure 1.5). With a floor heating system it is possible to maintain an average air temperature of 19°C compared to a traditional system where the average temperature is 20°C, just one degree centigrade less can generate a saving in energy of approximately 7%. Top = A · Ta + (1-A) · Tmr. Figure 1.4 Traditional system.. 20. Figure 1.5 Floor heating.. 23 24. 19 19. DISPERSION 20. DISPERSION. 20. 30. 20. 19. 21 19 © 2008. 21. 40. © 2008. Valsir S.. p.A.. Valsir S.. p.A.. The considerations made for floor heating systems, also apply to floor cooling systems. The temperature of cooling air can take on higher values with important consequences on an energy conservation level without altering the conditions of well-being. Top = A · Ta + (1-A) · Tmr. Figure 1.6 Traditional air-conditioning system.. Figure 1.7 Floor cooling.. 24. 27 34. 34. © 2008. 10. Valsir S.. p.A.. © 2008. Valsir S.. p.A..

(11) 1.4.4 Reduced stratification of the air temperature Another of the advantages of a system with radiant panels is the reduced stratification of the air temperature. In traditional systems, the heating element significantly increases the temperature of the air (35°C-40°C) thus favouring the distribution of hot air in proximity to the ceiling. The effect of this stratification of the air is amplified in rooms with very high ceilings where the differences in temperature between the floor and ceiling can even reach 10°C (see Figure 1.8 and Figure 1.9). In floor heating systems temperature distribution is different, there is a temperature of about 22°C near the floor and a temperature of 18°C near the ceiling (in a residential building). This temperature distribution means that thermal energy is “consumed” where it is needed and that is, at the height of the room occupant. This significant difference in the distribution of temperatures introduces further advantages in energy saving. Figure 1.9 Real distribution.. 18. 18. 8m. 28. 26. 8m. 22. 18. DISPERSION. CHARACTERISTICS OF FLOOR HEATING SYSTEMS. Figure 1.8 Ideal distribution.. 18. 18. © 2008 Valsir S.p.A.. 1. DISPERSION © 2008 Valsir S.p.A.. 1.4.5 System water at low temperature The elevated exchange surface formed by the radiant floor means that ample volumes can be heated with the heat transfer fluid in the system running at low temperatures. For this reason it is convenient to use heat sources whose output increases when the required temperature decreases such as heat pumps, condensation boilers and solar panels. The supply temperature to the circuits range on average from 30°C to 40°C depending on the climatic conditions present; in a traditional system the supply temperature is on average 70°C, this significant difference consents further saving in energy since it allows an increase in the distribution performance of the system. The lower the temperatures of the heat transfer fluid the lower the energy losses in the distribution tract that runs from the boiler to the manifolds.. 11.

(12) 2. COMPONENTS CATALOGUE. MIXAL pipe. s Di. COMPONENTS CATALOGUE. 2. De. Item MIXAL 14x2 MIXAL 16x2 MIXAL 16x2 MIXAL 16x2 MIXAL 16x2 MIXAL 20x2 MIXAL 20x2 MIXAL 20x2 MIXAL 26x3. De (mm) 14 16 16 16 16 20 20 20 26. S (mm) 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 3.0. Di (mm) 10 12 12 12 12 16 16 16 20. COD. VS0100135 VS0100137 ✱ VS0113005 VS0113007 VS0100141 VS0100139 VS0113009 VS0113011 VS0100143. (m). 100 100 120 240 500 100 120 240 50. (m). 6400 5600 6720 5760 3000 3200 3840 1440 1440. Multilayer pipe in crosslinked polyethylene with intermediate layer in aluminium. ✱■Until stocks have finished quantity per pallet may be 4800 m.. V-ESSE insulating panel. P H. s1 s. Item V-ESSE20 V-ESSE30. L. S (mm) 50 60. S1 (mm) 20 30. LxH (mm) 1350x750 1350x750. P (cm) 7.5 7.5. Class (kPa) 150 150. Area (m ) COD. (m ) 1.0125 VS0109000 12.15 1.0125 VS0109001 10.12 2. 2. Pocketed panel in expanded polystyrene with blue EPS film.. V-ZETA insulating panel. P H. s1 s. Item V-ZETA20. L. S (mm) 50. S1 (mm) 20. LxH (mm) 1200x750. P (cm) 7.5. Class (kPa) 200. Area (m ) COD. 0.9 VS0109016 2. (m2). 10.8. Pocketed panel in expanded polystyrene.. V-ERRE insulating panel. P H. s1 s. Item V-ERRE10. L. S (mm) 32. S1 (mm) 10. LxH (mm) 1000x500. P (cm) 5. Class (kPa) 200. Area (m ) COD. 0.5 VS0109017 2. (m2). 10.0. Pocketed panel in expanded polystyrene coupled to black, compact, impact-resistant, rigid PS film equipped with bosses for securing the pipe.. 12.

(13) H. V-ELLE insulating panel. s P. Item V-ELLE20/200 V-ELLE30/250. S (mm) 20 30. H (mm) 1000 1000. P (cm) 5 5. Class (kPa) 200 250. Area (m ) 12 10 2. COD. VS0109018 VS0109019. (m2). 12.0 10.0. 2. Smooth panel in coils in expanded (V-ELLE 20/200) or extruded (V-ELLE 30/250) polystyrene with grey polyester aluminized film with blue square for facilitating installation, class 200 kPa (V-ELLE 20/200) and class 250 kPa (V-ELLE 30/250).. V-ENNE biocompatible insulation panel L L1. COMPONENTS CATALOGUE. s. Eco-friendly. H H1. Item L (mm) H (mm) L1 (mm) H1 (mm) S (mm) V-ELLE 1250 600 1265 615 30. Specific weight (kg/m ) COD. 240 VS0109020 3. (pcs). 5. (m2). 3.75. Insulation panel made of conifer wood fibres and latex to make it impermeable to the absorption of water. It is equipped with an L-shaped rebate for connecting the panels.. V-BAND edging strip. H s. Item V-BAND. HxS (mm) 200x7. COD. VS0109200. (m). 125. Insulating strip in white expanded polyethylene with adhesive on one side across the entire surface with protection film divided in two. The strip is coupled with a transparent film in polyethylene with a thickness of 40 µm to prevent cement seepage.. V-BAND/N biocompatible edging strip. H. Eco-friendly. s. Item V-BAND/N. L (mm) 20. H (mm) 150. S (mm) 8. COD. VS0109202. (pcs). 6. (m). 120. Biocompatible insulating strip in compact linen fibre felt. No other additional products are used in the production of the edging strip.. H. V-JOINT band for expansion joints. s. Item V-JOINT. HxS (mm) 200x7. COD. VS0109201. (m). 125. Insulating strip in white expanded polyethylene with 20 mm of adhesive on one end to be used with V-JOINT/T support to be stuck to the “mushrooms” on the V-ESSE panel.. 13.

(14) V-JOINT/T profile for expansion joints. Item V-JOINT/T. L (m) 1.2. COD. VS0109203. (m). 12. T-shaped profile with adhesive for securing the strip, for the V-JOINT expansion joints. Pack of 10 pieces.. 2. Item V-CLIP01. De Pipe (mm) 14, 16, 20. COD. VS0109400. (pcs). 100. Anchor clips for pipe diameters 14, 16, 20 mm to be used with V-ELLE panel.. V-CLIP anchor clips. Item V-CLIP02 V-CLIP03. De Pipe (mm) 16, 20 26. Grid wire (mm) 3÷5 3÷5. COD. VS0109403 VS0109405. (pcs). 25 25. Anchor clips for securing pipes to metal grid for use on insulating screed.. V-CLIP anchor clips. H. L. Item V-CLIP04. L (mm) 88. H (mm) 28. COD. VS0109406. (pcs). 100. Clips for securing anti-shrinkage metal grids to insulation panels.. P. V-RAIL fixing bars. H. COMPONENTS CATALOGUE. V-CLIP anchor clips. I. Item V-RAIL01 V-RAIL02. De Pipe (mm) LxHxI (mm) 16 2000x25x38 20 2000x25x50. P (cm) 5 5. COD. VS0109410 VS0109411. Fixing rails for pipe diameters 16 and 20 mm with adhesive strip for securing to smooth insulating panels.. 14. (pcs). 32 32. (m). 64 64.

(15) L1. Fixing screws for V-RAIL bar L. Item Fixing screws for V-RAIL. L (mm) 29. L1 (mm) 14. COD. VS0109409. (pcs). 100. Fixing screws for bars to secure V-RAIL01 and V-RAIL02 pipes to smooth panel.. 2. L. V-FOIL anti-humidity film H. H (m) 1.2. L (m) 120. COD. VS0109600. COMPONENTS CATALOGUE. Item V-FOIL. (m2). 120. Anti-vapour polyethylene film, 0.2 mm thick, with 25 mm of adhesive on the end.. L. V-ACUSTIC soundproof mat H. Item V-ACUSTIC. ∆LW = 28 dB(A). H (m) 1. L (m) 10. COD. VS0109601. (m2). 10. V-ACUSTIC allows foot-traffic noise to be reduced by 28 dB (in compliance with EN 12354-2) thanks to a dynamic rigidity of 21 MN/m3. It is a multilayer mat that also acts as a barrier to humidity with a thickness of 8 mm that, after been laid, falls to 6 mm. The bottom layer is made of white felt, which, thanks to the “Velcro” effect, prevents movement during installation. The mat must be laid with the use of the special waterproof strip.. L. V-ACUSTIC/N biocompatible soundproof mat. Eco-friendly. H. Item V-ACUSTIC/N. H (m) 1. L (m) 30. COD. VS0109602. (m2). 30. V-ACUSTIC/N allows a reduction in foot-traffic noise of approximately 14-17 dB with a dynamic rigidity of about 55 MN/m . This mat is made of compact linen fibre felt with a thickness of 5 mm. No other products are employed in the production of this mat. The linen fibre creates a “Velcro” effect with the underlying rough floor that prevents it moving during installation. 3. Adhesive tape for V-ACUSTIC soundproof mat. H (mm) 50. L (mm) 50. COD. VS0109900. (pcs). 1. Water proof gaffer tape for installation of V-ACUSTIC soundproof mat.. 15.

(16) V-FLUID concrete fluidizer. Item V-FLUID. COD. VS0109800. (kg). 10. This additive permits improved concrete flow with less water. Optimises the covering of loops during installation.. 2. D. COMPONENTS CATALOGUE. I. Distribution manifold. D d. L. Outlets 2 3 4 5 6 7 8 9 10 11 12. D (inch) G1”1/4 G1”1/4 G1”1/4 G1”1/4 G1”1/4 G1”1/4 G1”1/4 G1”1/4 G1”1/4 G1”1/4 G1”1/4. d (inchxmm) G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18 G3/4”x18. I (mm) 214 214 214 214 214 214 214 214 214 214 214. L (mm) 190 240 290 340 390 440 490 540 590 640 690. COD. VS0110102 VS0110103 VS0110104 VS0110105 VS0110106 VS0110107 VS0110108 VS0110109 VS0110110 VS0110111 VS0110112. (pcs). 1 1 1 1 1 1 1 1 1 1 1. Pre-assembled manifold for radiant panel systems complete with lockshield valves, valves with motor option (by means of thermoelectric heads supplied separately), flow meters (0.5-3.0 l/min), 1”1/4 tailpieces, compact terminal sets with thermometer, adjustment hexagonal key and fixing brackets for encased cabinet.. D. D. Kit for increasing manifold outlets. d. D. D. L. Outlets 2. D (inch) G1”1/4. d (inchxmm) G3/4”x18. L (mm) 168. COD. VS0110022. (pcs). 1. The package contains a supply manifold and a return manifold. Pre-assembled kit for adding two extra outlets to a manifold for radiant panel systems. The kit includes two 2-outlet manifolds with lockshield valves on the supply, valves with motor option (by means of thermoelectric heads supplied separately) on the return, flow meters (0.5-3.0 l/min), 1”1/4 tailpieces, and 1”1/4 nipples for connection to the existing manifold, adjustment hexagonal key and two 1”1/4 flat seals.. 16.

(17) Distribution manifold for high temperature circuits. D. H d. L. Outlets 2 3. D. L. D (inch) G3/4” G3/4”. d (inchxmm) G3/4”x18 G3/4”x18. H (mm) 87 87. L (mm) 155 205. kg 1.95 2.59. COD. VS0110020 VS0110021. (pcs). 2. 1 1. The package contains a supply manifold and a return manifold. Distribution manifold for high-temperature circuits. Used for supplying bathroom radiators or additional radiators in a floor heating system. (To be used with mixing kit).. COMPONENTS CATALOGUE. L. Pair of compact terminal sets for distribution manifold. D. e. d M. D (inch) G1”1/4. L (mm) 64.2. M (mm) 61. e (mm) 7. d (mm) 14.5. COD. VS0110026. (pcs). 1 pair. The package contains two compact terminal sets complete with drainage valves, manual air vent and thermometers.. L. Pair of straight interception valves for distribution manifold. H D1. D2 A. D1 (inch) G1”1/4. D2 (inch) G1”1/4. A (mm) 71. L (mm) 65. H (mm) 55.7. COD. VS0110034. (pcs). 1 pair. The package contains two straight valves: a red one for the supply and a blue one for the return.. D1. Pair of elbow interception valves for distribution manifold. L. D2 A. D1 (inch) G1”1/4. H. D2 (inch) G1”1/4. A (mm) 36. L (mm) 65. H (mm) 55.7. COD. VS0110033. (pcs). 1 pair. The package contains two elbow valves: a red one for supply and a blue one for return.. 17.

(18) Nut-ring-insert for distribution manifold. D (inchxmm) G3/4”x18 G3/4”x18 G3/4”x18. 2. Pipe (mmxmm) 14x2 16x2 20x2. COD. VS0110035 VS0110036 VS0110037. (pcs). 10 10 10. Fitting for connection of MIXAL pipes to distribution manifolds.. COMPONENTS CATALOGUE. Plug for distribution manifold. D (inchxmm) G3/4”x18. COD. VS0110040. (pcs). 10. Plug for distribution manifold outlets.. Pair of tailpieces for distribution manifold. D1. D2 L. D1 (inch) G1”1/4. D2 (inch) G1”1/4. L (mm) 47. COD. VS0110041. (pcs). 1 pair. The package contains two tailpieces complete with flat seal for coupling with compact valves code VS0110033 and VS0110034 and the distribution manifold.. Pair of adaptors for distribution manifold D1. D2 L. D1 (inch) G1”1/4. D2 (inch) G1”1/4. L (mm) 39. COD. VS0110042. (pcs). 1 pair. The package contains two adaptors complete with o-ring for coupling of two distribution manifold.. Flow meter for distribution manifold. D (inch x mm) G3/4”x18. Flow rate (l/m) 0.5÷3.0. Flow meter to be connected to distribution manifold (return side).. 18. COD. VS0110049. (pcs). 10.

(19) Mixing kit V-Mix01/PF and V-Mix01/PV. D2. L. I H D2. PF. 2. D1. D1. Adjustment Fixed point Variable point. D1 (inch) G1” G1”. D2 (inch) 1”1/4 1”1/4. L (mm) 345 335. H (mm) 335 350. I (mm) 214 214. COD. VS0110301 VS0110302. (pcs). 1 1. V-MIX01/PF: fixed point mixing kit with three-speed pump (head of 4 m, 5 m, 6 m), three-way valve, by-pass with adjustable differential valve, supply and return thermometer, safety thermostat and thermostatic head with liquid sensor. V-MIX01/PV: variable point mixing kit with three-speed pump (head of 4 m, 5 m, 6 m), three-way valve, by-pass with adjustable differential valve, supply and return thermometer, safety thermostat and thermostatic head with liquid sensor.. L D2. V-MIX02 fixed point mixing kit. D2. I. D1. H. D1. D1 (inch) G3/4”. D2 (inch) 1”1/4. L (mm) 280. H (mm) 344. I (mm) 214. COD. VS0110303. (pcs). 1. Fixed point mixing kit complete with thermostatic head equipped with three-speed pump (head of 4 m, 5 m, 6 m), thermometer on supply and return, lockshield valve on outlet of primary circuit, pre-adjusted safety by-pass and no-return valve.. D2. In-wall V-BOX distribution and mixing modules for constant temperatur. H. D1. D1 (inch) G3/4” G3/4” G3/4”. D2 (inch) G3/4” G3/4” G3/4”. L. HxLxP (mmxmmxmm) Exit 1 690x595x190 High temperature 690x595x190 High temperature 690x595x190 Low temperature. Exit 2 Low temperature Low temperature Low temperature. Exit 3 - Low temperature Low temperature. Adjustment Fixed point Fixed point Fixed point. COD. VS0110311 VS0110331 VS0110352 ✱. (pcs). 1 1 1. Compact distribution module, encased version, for high and low temperature circuits with fixed point mixing valve. Available for supplying two or three zones one of which is high temperature for supplying radiators. They are supplied complete with a painted steel cabinet, expanded polypropylene insulation, manifold with hydraulic compensator incorporated, three-speed circulators with 5 m head, compact interception valves, adjustment thermostatic heads and safety thermostat. The module has three different possibilities of connection to the boiler. ✱ Article not in stock, must be ordered specially.. 19. COMPONENTS CATALOGUE. Model V-MIX01/PF V-MIX01/PV. PV.

(20) D2. In-wall V-BOX distribution and mixing modules for variable temperature. H. D1. COMPONENTS CATALOGUE. 2. D1 (inch) G3/4” G3/4” G3/4”. D2 (inch) G3/4” G3/4” G3/4”. L. HxLxP (mmxmmxmm) Exit 1 690x595x190 High temperature 595x690x190 High temperature 690x595x190 Low temperature. Exit 2 Low temperature Low temperature Low temperature. Exit 3 - Low temperature Low temperature. Adjustment Variable point Variable point Variable point. COD. VS0110321 VS0110341 VS0110353 ✱ ✱. (pcs). 1 1 1. Compact distribution module, encased version, for high and low temperature circuits, with variable point valve with motor option ✱. Available for supplying two or three zones one of which is high temperature for supplying radiators. Supplied complete with painted steel cabinet, expanded polypropylene insulation, manifold with hydraulic compensator incorporated, three-speed circulators with 5 m head, compact interception valves, adjustment thermostatic heads and safety thermostat. The module has three different possibilities of connection to the boiler. ✱ The motor to be applied to the mixing valve (not included) is code VS0110701. ✱ ✱ Article not in stock, must be ordered specially.. D2. Wall-hanging V-BOX distribution and mixing modules for constant temperature. H. D1. D1 (inch) G3/4” G3/4” G3/4”. D2 (inch) G3/4” G3/4” G3/4”. L. HxLxP (mmxmmxmm) Exit 1 590x490x190 High temperature 590x490x190 High temperature 590x490x190 Low temperature. Exit 2 Low temperature Low temperature Low temperature. Exit 3 - Low temperature Low temperature. Adjustment Fixed point Fixed point Fixed point. COD. VS0110312 VS0110332 VS0110355 ✱. (pcs). 1 1 1. Compact distribution module, wall-hung version, for high and low temperature circuits with fixed point mixing valve. Available for supplying two or three zones one of which is high temperature for supplying radiators. Supplied complete with painted steel cabinet, expanded polypropylene insulation , manifold with hydraulic compensator incorporated, three-speed circulators with head of up to 5 m, compact interception valves, adjustment thermostatic heads and safety thermostat. Complete with protective cover in painted steel. ✱ Article not in stock, must be ordered specially.. D2. Wall-hanging V-BOX distribution and mixing modules for variable temperature. H. D1. D1 (inch) G3/4” G3/4”. D2 (inch) G3/4” G3/4”. L. HxLxP (mmxmmxmm) Exit 1 590x490x190 High temperature 590x490x190 High temperature. Exit 2 Low temperature Low temperature. Exit 3 - Low temperature. Adjustment Variable point Variable point. COD. VS0110322 VS0110342. (pcs). 1 1. Compact distribution module, encased version for high and low temperature circuits with variable point valve with motor option. Available for supplying two or three zones one of which is high temperature for supplying radiators. Supplied complete with painted steel cabinet, expanded polypropylene insulation, manifold with hydraulic compensator incorporated, three-speed circulators with 5 m head, compact interception valves, adjustment thermostatic heads and safety thermostat. The module has three different possibilities of connection to the boiler. ✱ The motor to be applied to the mixing valve (not included) is code VS0110701.. 20.

(21) Mixing sets for fixed point central heating systems. D1. H. D2. P. L. DN 25. D1 (inch) 1”1/2. D2 (inch) 1”. HxLxP (mmxmmxmm) 394x250x188. COD. VS0110802. (pcs). 2. 1. Set with fixed point mixing valve with thermostatic option* with by-pass on secondary and primary circuit. The set is complete with three-speed circulator with maximum head of 6 m, insulation in expanded polypropylene, interception valves with integrated thermometer on supply and return and thermostatic head with liquid sensor (code VS0110405). Possibility of changing supply from right to left with possibility of installation of a differential pressure group.. COMPONENTS CATALOGUE. D1. Thermal power plants’ mixing groups with variable temperature. H. D2. p. DN 25 32 40. L. D1 (inch) G1” G1”1/4 G1”1/2. D2 (inch) G1”1/2 G2” DN 40 ✱. HxLxP (mmxmmxmm) 394x250x188 483x265x120 615x320x200. COD. VS0110803 VS0110809 VS0110815. (pcs). 1 1 1. ✱ Flange DN 40 PN 6 with 4 holes. Group with variable point mixing valve with motor capacity ✱ ✱ with a by-pass on the secondary and primary. The group is complete with three speed circulator with maximum predominance 6 m, insulation in expanded polypropylene, interception valves with thermometer integrated on the supply and return. Possibility of changing supply from right to left with possibility of installing a differential pressure group. ✱ ✱ The motor to apply to the mixing valve (not included) is code number VS0110701.. D1. High temperature groups for thermal power plants. H. p. DN 25 32 40. D2. L. D1 (inch) G1” G1”1/4 G1”1/2. D2 (inch) G1”1/2 G2” DN 40 ✱. HxLxP (mmxmmxmm) 394x250x188 483x265x120 615x320x200. COD. VS0110801 VS0110807 VS0110813. (pcs). 1 1 1. ✱ Flange DN 40 PN 6 with 4 holes. Group for high temperature circuits complete with three speed circulator with maximum predominance 6 m, insulation in expanded polypropylene, interception valves wit thermometer integrated on the supply and return.. 21.

(22) Distribution manifold for thermal power plants. D2. H D1 L. COMPONENTS CATALOGUE. 2. DN 25 25 25 25 32 ✱ ✱ ✱ 32 ✱ ✱ ✱ 32 ✱ ✱ ✱ 32 ✱ ✱ ✱ 40 40. D1 (inch) G1”1/2 G1”1/2 G1”1/2 G1”1/2 G1”1/2 G1”1/2 G1”1/2 G1”1/2 DN 65 ✱ DN 65 ✱. D2 (inch) G1”1/2 G1”1/2 G1”1/2 G1”1/2 G2” G2” G2” G2” DN 65 ✱ ✱ DN 65 ✱ ✱. Exits 2 3 4 5 2 3 4 5 3 4. HxLxP (mmxmmxmm) 120x505x120 120x755x120 120x1005x120 120x1255x120 150x530x150 150x795x150 150x1060x150 150x1325x150 220x1020x220 220x1340x220. COD. VS0110821 VS0110823 VS0110824 VS0110825 VS0110831 VS0110833 VS0110834 VS0110835 VS0110843 VS0110845. (pcs). 1 1 1 1 1 1 1 1 1 1. ✱ Flange DN 40 PN 6 with 4 holes. ✱ ✱ Flange DN 65 PN 16 with 4 holes. ✱ ✱ ✱ Without compact interception valves (code VS0110869). Distribution manifolds for heat centres complete with insulation in expanded polypropylene with compact interception valves on the supply and return connections to the mixing and distribution group.. Compact interception valves kit with nut DN 32. D1. D. DN 32. D1 (inch) G1”1/2. D2 (inch) G2”. COD. VS0110869. (pcs). 1. D1. Hydraulic separator for distribution manifold. D D. H. D2 L. DN 25 32 40. D (inch) G1”1/2 G1”1/2 DN 65 ✱. D1 (inch) G1/2” G1/2” G1/2”. D2 (inch) G3/4” G1”1/4 G1”1/4. HxLxP (mmxmmxmm) 520x120x120 970x150x150 970x220x220. ✱ Flange DN 65 PN 16 with 4 holes. Hydraulic separator complete with insulation in expanded polypropylene with threaded attachments for air vent groups and for system drainage.. 22. COD. VS0110851 VS0110853 VS0110855. (pcs). 1 1 1.

(23) Manifold/hydraulic separator connection kit. DN 25 25 25 25 32 32 32 32 40. Manifold exits 2 3 4 5 2 3 4 5 3÷4. COD. VS0110871 VS0110873 VS0110874 VS0110875 VS0110881 VS0110883 VS0110884 VS0110885 VS0110891. (pcs). 1 1 1 1 1 1 1 1 1. 2. Supply/return pipes insulated for connection of the distribution manifold to the vertical hydraulic separator.. COMPONENTS CATALOGUE. Support kit for manifold. DN 25-32 40. COD. VS0112021 VS0112023. (pcs). 1 1. The kit contains a pair of supports for fixing the manifold to the wall. The kit DN 40 is composed of small support feet, adjustable in height.. Differential pressure group. DN 25 32. COD. VS0110861 VS0110863. (pz). 1 1. Differential group composed of 3/4” valve with measurement field of 2 to 6.5 m.w.c. (maximum operating pressure 8 bar), fittings and seals.. Servo motors for mixing valve. Nominal voltage 230 Vac ✱ 24 Vdc ✱ ✱. Power consumption 2.5 W 1.5 W. Torque 5 Nm 5 Nm. Running time 140 s 140 s. COD. VS0110701 VS0110703. (pz). 1 1. ✱ Servo motors with 3 point regulation system and 220V supply. It is complete with graded scale for the identification of the position and selector for changing the automatic/manual function. It is mounted by means of a blocking screw and a anti-rotation reference rod. ✱ ✱ Servo motors 0÷10 V complete with graded scale for the identification of the position and selector for changing the automatic/manual function. It is mounted by means of a blocking screw and a anti-rotation reference rod.. 23.

(24) V-DRYAIR 250V isotherm dehumidifier for wall installation. COMPONENTS CATALOGUE. 2. Item V-DRYAIR 250V ✱. Nominal flow 250 m3/h. Water flow 170 l/h. Voltage 230. HxLxP (mmxmmxmm) 729x705x212. COD. VS0110901. (pcs). 1. Isotherm in-wall recessed dehumidifier. V-DRYAIR 250V is used for the dehumidification in the summer of rooms that are cooled wit the use of radiant panels. The load-bearing structure is in galvanized sheet metal and the ventilation part is made up of a centrifugal ventilator and a motor with the choice of three speeds that guarantees efficiency and a silent operation. Air treatment is ensured by a refrigeration circuit composed of pre-treatment and post-treatment batteries in copper pipes and aluminium fins, an alternative compressor mounted on anti-vibration supports or springs, expansion capillary and dehydrator filter. ✱ For in-wall installation it must be combined with the housing cabinet and wooden panel cod. VSO110911.. V-DRYAIR 250H isotherm dehumidifier for ceiling installation with possibility of ducting. Item V-DRYAIR 250H. Nominal flow 250 m3/h. Water flow 170 l/h. Voltage 230. HxLxP (mmxmmxmm) 250x593x800. COD. VS0110903. (pcs). 1. Isotherm dehumidifier for ceiling installation with possibility of ducting for air delivery and return. V-DRYAIR 250H is used for the dehumidification in the summer of rooms that are cooled wit the use of radiant panels. The load-bearing structure is in galvanized sheet metal and the ventilation part is made up of a centrifugal ventilator and a motor with the choice of three speeds that guarantees efficiency and a silent operation. Air treatment is ensured by a refrigeration circuit composed of pre-treatment and post-treatment batteries in copper pipes and aluminium fins, an alternative compressor mounted on anti-vibration supports or springs, expansion capillary and dehydrator filter.. V-DRYAIR 450H isotherm dehumidifiers for ceiling installation with possibility of ducting. Item V-DRYAIR 450H ✱. Nominal flow 450 m3/h. Water flow 350 l/h. Voltage 230. HxLxP (mmxmmxmm) 405x875x655. COD. VS0110905. (pcs). 1. Isotherm dehumidifier for ceiling installation with possibility of ducting for air delivery and return. V-DRYAIR 250H is used for the dehumidification in the summer of rooms that are cooled wit the use of radiant panels. The load-bearing structure is in galvanized sheet metal and the ventilation part is made up of a centrifugal ventilator and a motor with the choice of three speeds that guarantees efficiency and a silent operation. Air treatment is ensured by a refrigeration circuit composed of pre-treatment and post-treatment batteries in copper pipes and aluminium fins, an alternative compressor mounted on anti-vibration supports or springs, expansion capillary and dehydrator filter. ✱ Can be combined with renewal and recovery unit cod. VS0110913 and plenum chamber cod. VS01109015.. 24.

(25) V-DRYAIR 900H isotherm dehumidifiers for ceiling installation with possibility of ducting. Item V-DRYAIR 900H ✱. Nominal flow 900 m3/h. Water flow 600 l/h. Voltage 230. HxLxP (mmxmmxmm) 405x875x805. COD. VS0110907. (pcs). 1. ✱ Can be connected to the renewal and recovery unit cod. VS0110917 and plenum chamber cod. VS01109019.. CHousing cabinet and wooden covering panel for V-DRYAIR 250V. COD. VS0110911. (pcs). 1. The housing cabinet is installed in the wall recess and houses the V-DRYAIR 250 V dehumidifier (cod. VS0110901); the base of the cabinet is perforated to allow passage of supply and return pipes, of pipes for the discharge of condensation and the electrical wires. The covering panel is made of white lacquered wood with air delivery and inhalation grid.. Renewal and recovery unit for V-DRYAIR 450H isotherm dehumidifiers. Maximum input current 0.7 A. Maximum input power 60 W. Voltage 230 Vca. HxLxP (mmxmmxmm) 405x750x655. COD. VS0110913. (pcs). 1. The renewal and recovery unit guarantees a fresh air exchange inside the building by recovering the heat being discharged which is then exchanged with fresh air from the outside; this process is created by intersecting the air flows, so that the process air is preheated/pre-cooled, thus increasing the efficiency of the unit and reducing energy consumption.. 25. COMPONENTS CATALOGUE. Isotherm dehumidifier for ceiling installation with possibility of ducting for air delivery and return. V-DRYAIR 900H is used for the dehumidification in the summer of rooms that are cooled wit the use of radiant panels. The load-bearing structure is in galvanized sheet metal and the ventilation part is made up of a centrifugal ventilator and a motor with the choice of three speeds that guarantees efficiency and a silent operation. Air treatment is ensured by a refrigeration circuit composed of pre-treatment and post-treatment batteries in copper pipes and aluminium fins, an alternative compressor mounted on anti-vibration supports or springs, expansion capillary and dehydrator filter.. HxLxP (mmxmmxmm) 740x750x230. 2.

(26) Plenum chamber for V-DRYAIR 450H isotherm dehumidifier. 2. HxLxP (mmxmmxmm) 405x220x655. COD. VS0110915. (pcs). 1. COMPONENTS CATALOGUE. The plenum chamber is hooked up to the main recovery duct of the V-DRYAIR 450H isotherm dehumidifier and allows an increase in the ducts of up to maximum number of three, contemporarily. It has been designed so that all the panels can be dismantled in order to create the most suitable configuration for the system.. Renewal and recovery modules for V-DRYAIR 900H isotherm dehumidifier. Maximum input current 1.5 A. Maximum input power 150 W. Voltage 230 Vca. HxLxP (mmxmmxmm) 405x1050x805. COD. VS0110917. (pcs). 1. The renewal and recovery unit guarantees a fresh air exchange inside the building by recovering the heat being discharged which is then exchanged with fresh air from the outside; this process is created by intersecting the air flows, so that the process air is preheated/pre-cooled, thus increasing the efficiency of the unit and reducing energy consumption.. Plenum chamber for V-DRYAIR 450H isotherm dehumidifier. HxLxP (mmxmmxmm) 405x220x655. COD. VS0110919. (pcs). 1. The plenum chamber is hooked up to the main recovery duct of the V-DRYAIR 900H isotherm dehumidifier and allows an increase in the ducts of up to a maximum number of three, contemporarily. It has been designed so that all the panels can be dismantled in order to create the most suitable configuration for the system.. A B. Thermo-electric head. d. L. D (mmxmm) M28x1.5. Measuring fields 30÷50 °C. A (mm) 52. ✱ Thermostatic head with immersion sensor for mixing kit.. 26. B (mm) 81.5. L (mm) 160. d (mm) 11. COD. VS0110405 ✱. (pcs). 1.

(27) Thermo-electric head. Working frequency 24 V ✱ 220 V ✱ ✱. no. connections 2 wires 4 wires. COD. VS0110430 VS0110432. (pcs). 1 1. On/off thermoelectric heads with adaptor for distribution manifold. They regulate the flow in floor heating circuits. They are applied to the distribution manifolds (return side).. 2. ✱ Can be used only with the control unit code VS0110600 and VS0110605. ✱ ✱ Can be used with a direct connection to the zone thermostats (on/off signal) and to the electric line 220 V.. Circuit control unit. Max circuits 4 14. Working frequency 24 V 24 V. COD. VS0110600 VS0110605. COMPONENTS CATALOGUE. Zones 1 6. (pcs). 1 1. Control unit of heating circuits. It is the command box of the thermo-electric heads, which operates depending on the temperature picked up by the thermostats.. Mixing kit pump control module. Zones 2. Working frequency 24 V. COD. VS0110610. (pcs). 1. Module for increasing the number of zones controlled per control unit cod. VS0110600 and cod. VS0110605.. Mixing kit pump control module. Working frequency 24 V. COD. VS0110620. (pcs). 1. Module turns off the circulator pump when all the circuits are closed, to avoid activating the safety by-pass of the mixing kit.. Regulators for mixing groups for central heating systems. Working frequency No. of inlets 24-220 V 2. No. of relay outlets 2. COD. VS0111101. (pcs). 1. Electronic control that can be mounted with a DIN guide capable of managing 1 three-way valve. Regulates the opening of the valve in order to supply water to the system based on the programmed set point. 2 inlets for NTC probes for detecting the temperature (code VS0110057) are available, as well as 2 relay outlets for controlling the servomotor 220 V (code VS0110701).. 27.

(28) V-CLIMA master adjustment kit. 2. Function Heating and cooling. COMPONENTS CATALOGUE. Heating only. Working frequency 20/60 Vdc and 24 Vac (50÷60 Hz) 20/60 Vdc and 24 Vac (50÷60 Hz). Working conditions. Dimensions of master control unit. COD.. -10°C÷60°C/U.R. < 90%. 140x60x110. VS0111001. 1. -10°C÷60°C/U.R. < 90%. 140x60x110. VS0111011. 1. (pz). The V-CLIMA master adjustment kit is capable of adjusting the supply temperature of a floor heating system for one zone in relation to the variations in the external temperature. With the kit code VS0111001 the adjustment is made both in the winter mode (heating) and the summer mode (cooling), with the kit code VS0111011 the adjustment occurs in the winter mode. Possibility of management of up to 6 adjustment zones by means of the addition of expansion kit. The V-CLIMA master adjustment kit is complete with master unit with built-in terminal, connection kit, timer, supply probe, room temperature/humidity probe (or just temperature probe) and external temperature probe.. V-CLIMA expansion. Function Heating and cooling Heating only. Working frequency 20/60 Vdc and 24 Vac (50÷60 Hz) 20/60 Vdc and 24 Vac (50÷60 Hz). Working conditions. Dimensions of expansion (mm). COD.. -10°C÷60°C/U.R. < 90%. 70x60x110. VS0111003. 1. -10°C÷60°C/U.R. < 90%. 70x60x110. VS0111013. 1. (pz). Expansion module capable of adjusting the supply temperature of a floor heating system for one zone in relation to the variations in the external temperature. With the kit code VS0111003 adjustment is made both in the winter mode (heating) and the summer mode (cooling), with the kit code VS0111013 adjustment occurs in the winter mode only. The V-CLIMA expansion kit is composed of an expansion unit to be connected to the master module, a connection kit, supply probe and temperature/humidity room probe (or just temperature probe).. V-CLIMA winter/summer converter. Working frequency 24 Vac (5°-60 Hz). Working conditions 0-50 °C / U.R. < 90%. Dimensions of converter (mm) 87x36x60. COD. VS0111065. (pcs). 1. Transforming module that when connected to the V-CLIMA system is capable of activating the flow deviation valves on the supply of the floor heating system, opening the boiler circuit or the chilling circuit.. 28.

(29) V-CLIMA remote adjustment terminal. Working frequency Supply through master unit or else by means of an external supplier 18/30 Vdc. Working conditions. Dimensions of terminal (mm). COD.. -20°C÷60°C/U.R. < 90%. 156x82x30. VS0111051. (pcs). 1. 2. The remote terminal with LCD display allows the user to carry out all of the system adjustments and the maintenance technician to verify, test and set the operation parameters of the system. It is equipped with the function “time bands”, the passage from day mode to night mode of the heating system.. COMPONENTS CATALOGUE. Supply probe for the V-CLIMA system. Function Temperature probe. Working range -50°C÷105°C. Bulb dimensions (mm) 60x40. COD. VS0111057. (pcs). 1. Supply probe (NTC type) to interface with V-CLIMA system for the measurement of the supply temperature to the system.. Room probe for V-CLIMA system. Function Temperature/humidity probe Temperature probe. Working range 0°C÷50°C/U.R. 0÷100% 0°C÷50°C. Supply voltage 9/30 Vdc and 12/24 Vac 9/30 Vdc and 12/24 Vac. COD. VS0111058 VS0111060. (pcs). 1 1. Temperature detection probe (NTC type) and room humidity probe (0-1 V type convertible 4-20 mA).. External probe for V-CLIMA system. Function Temperature probe. Working range -30°C÷50°C/U.R. 0÷100%. Supply voltage 9/30 Vdc and 12/24 Vac. COD. VS0111059. (pcs). 1. External temperature detection probe (NTC type).. 29.

(30) Fixer for clips. COD.. (pcs). VS0112000. 1. Fixer for clips cod. VS0109400 for anchoring MIXAL pipe to V-ELLE panel.. COMPONENTS CATALOGUE. 2. Pipe unwinder. COD.. (pcs). VS0112002. 1. L. Antishrinkage net H. m. LxHxm (mmxmmxmm) 2000x1000x50. Wire (mm) 2. COD. VS0109700. (m2). 400. Anti-shrinkage grid in sheets, in galvanised steel for impact-resistant reinforced structures.. Polypropylene anti-shrinkage grid H. p. LxHxm (mxmmxmm) 50x1000x50. COD. VS0109701. (m2). 2. Anti-shrinkage grid in rolls, in high-resistant polypropylene for impact-resistant reinforced structures.. In-wall metal cabinet for distribution manifold. L (mm) 400 600 800 1000 1200. H (mm) 700÷820 700÷820 700÷820 700÷820 700÷820. S (mm) 80÷130 80÷130 80÷130 80÷130 80÷130. COD. VS0112007 VS0112008 VS0112009 VS0112010 VS0112011. (pcs). 1 1 1 1 1. In-wall cabinet for mixing kit and distribution manifold, adjustable in height and depth. In powder coated steel and complete with support feet.. 30.

(31) 3. Technical characteristics of the components. 3.1 PEXAL and MIXAL pipe 3.1.1 General characteristics Valsir has chosen to use the PEXAL and MIXAL pipes for floor heating systems due to their excellent thermo-mechanical properties. The PEXAL and MIXAL pipes are characterised by a particular multilayer structure which distinguishes itself from other pipes used in floor heating systems in that it possesses an inner layer in aluminium which is completely wrapped around the pipe and makes it perfectly oxygen proof. The multilayer pipe offers all the typical advantages of a metal pipe as well as those of a plastic pipe and at the same time, the qualities of one material compensate for the inadequacies of the other. The negative aspects of metal, such as corrosion, toxicity, encrustations, rigidity, weight and elevated pressure loss, are neutralised by the crosslinked polyethylene, which is in contact with the fluid transported in the pipe. The negative aspects of plastic, such as the passage of gas, the sensitivity to UV rays, and the elevated thermal expansion are all overcome thanks to the layer in aluminium. The MIXAL pipe is the most suitable solution for the creation of floor heating systems both in civil and industrial applications. Its structure is composed of: ➀ an outer layer in high-density polyethylene HDPE, white in colour, RAL 9003, ➁ an intermediate layer of aluminium alloy, butt-welded in an axial direction, ➂ two binding layers of adhesive, which unite the intermediate metal layers to the outer and inner layers of plastic, ➃ an inner layer of crosslinked polyethylene PE-Xb.. 3. Technical characteristics of the components. Figure 3.1.1 Multilayer structure of MIXAL pipe.. ➀. ➁ ➃. ➂. 31.

(32) The PEXAL pipe is mainly employed in water supply applications and for the creation of heating plants thanks to its structure composition: ➀ an outer layer of crosslinked polyethylene PE-Xb, white in colour, RAL 9003, ➁ an intermediate layer of aluminium alloy, butt-welded in an axial direction, ➂ two binding layers of adhesive unite the intermediate metal layer to the outer and inner layers of plastic, ➃ an inner layer of crosslinked polyethylene PE-Xb. Figure 3.1.2 Multilayer structure of PEXAL pipe.. ➀. ➁ ➃. 3. Technical characteristics of the components. ➂ The dimensional characteristics are indicated in the following table. Table 3.1.1 Characteristics of the MIXAL pipe for floor heating systems.. Characteristic. MIXAL. External diameter. mm. 14. 16. 20. 26. Total thickness. mm. 2.0. 2.0. 2.0. 3.0. Thickness of aluminium layer. mm. 0.2. 0.2. 0.25. 0.3. Weight. g/m. 100. 105. 140. 50. Water capacity. l/m. 0.077. 0.113. 0.201. 0.314. Operating temperature. °C. 0÷80. 0÷80. 0÷80. 0÷80. Maximum operating temperature. °C. 95. 95. 95. 95. Maximum operating pressure at 95°C. bar. 10. 10. 10. 10. mm/m·K. 0.026. 0.026. 0.026. 0.026. W/m·K. 0.42. 0.43. 0.43. 0.42. Internal roughness. mm. 0.007. 0.007. 0.007. 0.007. Oxygen diffusion. mg/l. 0. 0. 0. 0. Bending radius without pipe bender. mm. 70. 80. 100. 140. Bending radius with pipe bender. mm. 35. 50. 80. 100. Thermal expansion coefficient Internal heat conductivity. 32.

(33) 3.1.2 Characteristics of crosslinked polyethylene PE-Xb Crosslinked polyethylene PE-Xb has excellent mechanical characteristics in comparison with normal high-density polyethylene. The elevated stability of its mechanical properties, even at high temperatures, make it an absolutely ideal material for use in heating applications where the fluid conveyed can reach elevated temperatures. These characteristics are generated by the crosslinking process during which the material undergoes a structural modification, which improves its mechanical resistance, its resistance to abrasion and its resistance to chemical agents. Table 3.1.2 Some characteristics of crosslinked polyethylene PE-Xb.. Characteristic. Measurement unit. Value. kg/m3. 950. Minimum degree of crosslinking. %. 65. Softening temperature. °C. 135. Tensile strength at 23°C. MPa. 23. Tensile strength at 100°C. MPa. 9. Thermal conductivity coefficient. W/m·K. 0.38. Specific heat at 23°C. kJ/kg·K. 1.92. Coefficient of linear expansion. mm/m·K. 0.2. Density. 3. The aluminium used in the production of the PEXAL and MIXAL multilayer pipes is composed of sheets of aluminium alloy. The sheet is formed around the layer of PE-X and the two extremities, which run along the length of the pipe, are butt welded with a TIG welding process (Tungsten Inert Gas). This technology enables the production of multilayer pipes with an aluminium thickness of 0.2 mm to 2.5 mm and, therefore, also large diameter pipes with an elevated aluminium thickness. The principal characteristics of the aluminium alloy utilised in the production of the multilayer pipe are good welding, elevated yield point, storage in dry areas to guarantee the perfect conservation of the aluminium. Figure 3.1.3 Aluminium layer in PEXAL and MIXAL pipes.. 3.1.4 Mechanical behaviour The mechanical characteristics of the multilayer pipe make it ideal for use in floor heating systems. There is no spring-back, that is, once the pipe has been bent it maintains the circular section in proximity to the bend and remains in the desired position like a metal pipe; in this way, the applications of fixing clips that are normally used with all-plastic pipes, is considerably reduced.. 33. Technical characteristics of the components. 3.1.3 Characteristics of aluminium.

(34) 3.1.5 Expansion The heat expansion of PEXAL and MIXAL multilayer pipes is 0.026 mm/m·K; this value is comparable to the heat expansion of metal pipes. The table below shows how all-plastic pipes have much higher expansion coefficients and, in particular, PE-X has an expansion coefficient of 0.20 mm/m·K. Table 3.1.3 Comparison of heat expansion with other materials.. Type of material. Heat expansion mm/m·K. PEXAL/MIXAL. 0.026. Galvanised steel. 0.012. Stainless steel. 0.016. Copper. 0.016. Plastic material (PE-X, PE-HD, PB, PPR, PE-RT). 0.120÷0.200. 3.1.6 Resistance to abrasion, encrustation and corrosion. TECHNICAL CHARACTERISTICS OF THE COMPONENTS. 3. PE-X does not corrode and its smooth surface does not favour the formation of encrustation. As it is not subject to corrosion, there is no build-up of rust particles resulting from galvanic corrosion. Furthermore, PE-X is particularly resistant to abrasion; this is an extremely important characteristic in the proximity of bends where the abrasive effect of fluids and the particles contained in the fluid, tends to be greater.. 3.1.7 Barrier to oxygen and UV rays The inner layer of aluminium makes for a perfect barrier to the passage of gaseous molecules, thus avoiding every danger of corrosion caused by the infiltration of oxygen and damages caused by exposure to UV rays. In the following table, a comparison is made between the coefficients of oxygen transmission (Oxygen Transmission Rate) of aluminium, of the material used for the oxygen barrier (EVOH) in PE-X pipes with EVOH, and of crosslinked polyethylene. Figure 3.1.4 Impermeability to oxygen of the multilayer pipe and permeability of all-plastic pipes.. O2 O2 O2. O2. O2 O2 O2. O2. O2. O2 O2. O2. O2 © 2008 Valsir S.p.A.. O2. O2. © 2008 Valsir S.p.A.. Table 3.1.4 Coefficient of oxygen transmission OTR.. Pipe Aluminium Barrier EVOH PE-X. OTR a 25°C and 0% UR [cm3/20mm·m2·giorno·bar] 0 0,21 12000. The oxygen diffusion value in PEXAL and MIXAL pipes is zero thanks to the presence of the internal layer of aluminium across the entire range of diameters and regardless of room temperature and humidity.. 34.

(35) In PE-X pipes with barriers, the oxygen transmission coefficient OTR increases as the temperature and relative humidity rises (Figure 3.1.5 and Figure 3.1.6). Even at a temperature of 45°C and with a relative humidity of 65%, the EVOH barrier has an oxygen transmission coefficient of almost 3.0 cm3/20m·m2·day·bar. Many of the PEX pipes distributed today on the market, possess an oxygen barrier that is generally positioned on the outside on the pipe. Such a layer is, therefore, significantly exposed not only to the danger of being scraped and cut but is also exposed to the negative effect of humidity which drastically reduces the barrier. Figure 3.1.5 Coefficient of oxygen transmission of EVOH in relation to temperature. 4.0. 3.5. 3.0. OTR to 65% UR. 2.5. 2.0. 3. 1.5. 1.0. Technical characteristics of the components. 0.5 © 2008 Valsir S.p.A.. 20. 25. 30. 35. 40. 45. 50. Temperature [°C]. Figure 3.1.6 Coefficient of oxygen transmission of EVOH in relation to relative humidity. 100 80 60 40 20. OTR to 20°C. 10 8 6 4 2 1 0.8 0.6 0.4 0.2 0.1. © 2008 Valsir S.p.A.. 0. 20. 40. 60. 80. 100. Relative humidity UR [%]. 3.1.8 Lightweight The specific weights of the materials that make up the pipe are low. A coil of 100 metres of MIXAL 16x2 weighs approximately 10.5 kg.. 3.1.9 Sound absorption The soundproof properties of the pipe are very good. The internal and external layers in polyethylene reduce noises, which are normally not absorbed by metal pipes. 35.

(36) 3.1.10 Long lasting The PEXAL and MIXAL pipes are designed to resist a pressure of up to 10 bar with working temperatures of 95°C. The crosslinked polyethylene possesses, in fact, a very high ageing resistance. Artificial ageing tests carried out in laboratories guarantee the pipe a life of over 50 years. At operating temperatures below 95°C, the pipe can support pressures of over 10 bar without any damage being caused; at 20°C it can be used at a pressure as high as 25 bar. The technical characteristics of the PEXAL and MIXAL multilayer pipes are therefore of an elevated level, especially if they are compared with the real operating conditions of floor heating systems which, on average, operate at temperatures of 45°C and pressures which do not exceed 2-2.5 bar. The safety margin of floor heating applications with PEXAL and MIXAL multilayer pipes is very high. With a temperature of 95°C and a safety margin of 1.5, the pipe can be used at a pressure of 10 bar. At the same temperature, therefore, if used at a pressure of 2.5 bar, the safety coefficient increases to 6 and, obviously, increases even more if the temperature is reduced to 45°C.. 3.1.11 Heat conductivity. 3. The heat conductivity of the MIXAL pipe depends on the multilayer structure of the pipe, and in particular, on the thickness and the position of the aluminium layer. Whereas the value for PE-X pipes is 0.38 W/m·K, the conductivity of the MIXAL pipes ranges from 0.42 W/m·K to 0.43 W/m·K (see Table 3.1.1). This difference clearly favours the use of PEXAL and MIXAL pipes for floor heating systems in that it is possible to create systems with an optimum heat output.. TECHNICAL CHARACTERISTICS OF THE COMPONENTS. 3.1.12 Comparison of heat outputs of different pipes As seen in the previous paragraph, the presence of the aluminium layer, its thickness and its particular position allow the achievement of excellent heat conductivity properties. With the MIXAL pipe, it is possible to create floor heating systems with higher heat outputs, in fact, the higher conductivity generates higher temperatures on the surface of the pipe than PEX pipes (see Figure 3.1.7) and this advantage is reflected, for example, in the possibility of using relatively lower supply temperatures (see Figure 3.1.8). Figure 3.1.7 External surface temperature of the pipe (example). Tm = 40°C. Tm = 40°C. Tde = 36.4°C. Tde = 35.7°C. © 2008 Valsir S.p.A.. © 2008 Valsir S.p.A.. MIXAL. Plastic pipe. Figure 3.1.8 Supply temperature (example). Ta = 20°C Tf = 27.3°C. Tf = 27.3°C. concrete. Tm = 39.3°C. Tm = 40°C MIXAL. Plastic pipe © 2008 Valsir S.p.A.. 36.

(37) The greater performance of the MIXAL pipe as compared with PEX pipes is evident in Figure 3.1.9 where, with equal system conditions, greater thermal output is achieved. In the case examined, there is a increase of 2.2% in the thermal output, both with a pipe spacing of 15 cm and a pipe spacing of 22.5 cm Figure 3.1.9 Comparison of outputs of MIXAL 16x2 pipe and PEX 16x2 pipe.. Spacing 15 cm Thermal output 12 W/m +2.56%. Thermal output 11.7 W/m. Tm = 46°C. Tm = 46°C. v=0.11 m/s. v=0.11 m/s. ∆T = 19°C. ∆T = 19°C. © 2008 Valsir S.p.A.. © 2008 Valsir S.p.A.. MIXAL 16x2. 3. PEX 16x2. Thermal output 18 W/m +2.22%. Thermal output 17.6 W/m. Tm = 46°C. Tm = 46°C. v=0.15 m/s. v=0.15 m/s. ∆T = 14.4°C. ∆T = 14.4°C. © 2008 Valsir S.p.A.. © 2008 Valsir S.p.A.. MIXAL 16x2. PEX 16x2. The considerations examined above allow us to reach a conclusion of significant importance, and that is, the possibility of using smaller diameters than those used with all-plastic pipes. To simplify the concept, let us imagine that we need to install a floor heating circuit for a 10 m2 room that requires a specific heat output of 80 W/m2. The floor is composed of a Valsir V-ESSE20 insulation panel, the layer of concrete above the pipes is 40 mm thick and for simplicity sake, we will not take any type of floor covering into account. In the following two tables, a comparison is made between the values of two circuits installed with a 17x2 diameter PEX pipe and a 16x2 MIXAL pipe with two different pipe spacing values and a supply temperature of 45°C.. It is evident that the flow and speed of the circuits are more or less the same and therefore, that the 16x2 diameter MIXAL pipe can be used instead of the 17x2 diameter PEX pipe.. 37. TECHNICAL CHARACTERISTICS OF THE COMPONENTS. Spacing 22.5 cm.

(38) Table 3.1.5 Comparison between PEX and MIXAL with pipe spacing of 15 cm.. Characteristics. PEX 17x2. MIXAL 16x2. Pipe spacing [cm]. 15. 15. Supply temperature [°C]. 45. 45. Loop lengths [m]. 66.7. 66.7. Temperature difference ∆T [°C]. 18.6. 18.8. Flow [l/h]. 46.6. 46.1. Velocity [m/s]. 0.10. 0.11. Table 3.1.6 Comparison between PEX and MIXAL pipes with a pipe spacing of 22.5 cm.. Characteristics. PEX 17x2. MIXAL 16x2. 22.5. 22.5. 45. 45. Loop lengths [m]. 44.4. 44.4. Temperature difference ∆T [°C]. 14.5. 14.1. Flow [l/h]. 61.4. 60.0. Velocity [m/s]. 0.13. 0.15. Pipe spacing [cm]. Technical characteristics of the components. 3. Supply temperature [°C]. Figure 3.1.10 Thermal output PEX 17x2 and MIXAL 16x2.. Same thermal output 12 W/m Spacing 15 cm. Tm = 45°C. Tm = 45°C. v=0.11 m/s. v=0.10 m/s. ∆T = 18.8°C. ∆T = 18.6°C. © 2008 Valsir S.p.A.. © 2008 Valsir S.p.A.. MIXAL 16x2. PEX 16x2. Same thermal output 18 W/m Spacing 22.5 cm. Tm = 45°C. Tm = 45°C. v=0.15 m/s. v=0.13 m/s. ∆T = 14.5°C. ∆T = 14.1°C. © 2008 Valsir S.p.A.. © 2008 Valsir S.p.A.. MIXAL 16x2. 38. PEX 16x2.

(39) 3.1.13 Pressure losses The internal layer of the pipe has an extremely smooth surface with a roughness of 0.007 mm. This surface does not favour the formation of incrustations or rust, which means that pressure loss is very low and does not alter over time. With the use of the diagrams in Figure 3.1.14, Figure 3.1.15 and Figure 3.1.16 it is possible to determine the pressure loss and flow speed in the PEXAL and MIXAL multilayer pipes in relation to the flow rate and the temperature of the water at 10°C, 30°C and 50°C respectively.. When dimensioning a floor heating circuit, localised pressure losses due to the continuous changes in direction of the radiant loops must also be accounted for. The linear pressure losses (calculated in the diagrams shown) must be increased by a percentage point, indicated in Table 3.1.7, which depends on the type of pipe layout adopted in the system. Table 3.1.7 Percentage increase in pressure losses in relation to the type of piping layout pattern.. Type of layout pattern. Percentage increase. Typical application. 17%. Industrial systems, snowmelt systems (Figura 3.1.11). Simple double serpentine. 17%. Industrial systems, heating systems for rooms with elevated surface areas, gymnasiums, warehouses, etc. (Figura 3.1.12). Counterflow spiral. 13%. Residential systems (Figura 3.1.13). Simple single serpentine. TECHNICAL CHARACTERISTICS OF THE COMPONENTS. Figure 3.1.11 Simple single serpentine.. Figure 3.1.12 Simple double serpentine.. © 2008 Valsir S.p.A.. 3. © 2008 Valsir S.p.A.. Figure 3.1.13 Counter-flow spiral.. © 2008 Valsir S.p.A.. 39.

(40) Water temperature: 10°C. 0.006. 0.008. 200. 100 80 60 40. 20. 14x2. 0.12. 16x2. 0.14. 18x2. 0.16. 20x2. 0.18. 1. 26x3. 4.5. 4.0. 3.5. 3.0. 2.5. 2.0. 1.8. 1.6. 1.4. 1.2. 1.0. 0.9. 0.8. 0.7. 0.6. 0.5. 0.4. 0.35. 0.3. 0.25. 0.2. Water velocity [m/s]. 10 8 6 4. 2. 1 0.8 0.6 0.4. 0.10. © 2008 Valsir S.p.A.. 2. 0.09. 0.8. 0.2. 0.08. 0.6. 0.07. 0.08. Water flow rate [l/s]. 40. 0.1. 0.1. 0.06. 0.04. 0.08 0.05. 3. 0.06 0.04. 0.06. 0.2. 0.4. Technical characteristics of the components. Figure 3.1.14 Pressure losses with water at 10°C.. Pressure losses [mbar/m]. 0.004. 0.01. 0.02.

(41) Figure 3.1.15 Pressure losses with water at 30°C.. Pressure losses [mbar/m]. Water temperature: 30°C. 0.008. 200. 80. 0.006. 100 60 40. 20. 10 8 6 4. 2. 1 0.8 0.6. 0.06. 0.09. 0.10 0.2. 0.12. 14x2. 0.14. 16x2. 0.6. 18x2. 0.16. 0.8. 20x2. 0,18. 0.2. 26x3. 4.5. 4.0. 3.5. 3.0. 2.5. 2.0. 1.8. 1.6. 1.4. 1.2. 1.0. 0.9. 0.8. 0.7. 0.6. 0.5. 0.4. 0.35. 0.3. 0.25. Water velocity [m/s]. 41. Technical characteristics of the components. 0.08. © 2008 Valsir S.p.A.. 2. 0.4. 0.07. 1. 0.2. 0.06. 0.4. 0.1. 0.02. 0.08. 0.01. 0.05. 0.1 Water flow rate [l/s]. 0.08. 0.06 0.04 0.004. 3 0.04.

(42) 200 Water temperature: 50°C. 0.006. 100 80 60 40. 20. 10 8. 14x2. 0.14. 16x2. 0.16. 18x2. 0.18. 20x2. 0.2. 1. 26x3. 4.5. 4.0. 3.5. 3.0. 2.5. 2.0. 1.8. 1.6. 1.4. 1.2. 1.0. 0.9. 0.8. 0.7. 0.6. 0.5. 0.4. 0.35. 0.3. 0.25. Water velocity [m/s]. 6 4. 2. 1 0.8 0.6. 0.12. © 2008 Valsir S.p.A.. 2. 0.4. 0.2. 0.2. 0.10. 0.8. 0.09. 0.6. 0.08. 0.1. 0.1. 0.07. 0.04. 0.08 0.06. 3. 0.05 0.008. 0.06 0.04. 0.08. Water flow rate [l/s]. 42. 0.06. 0.4. Technical characteristics of the components. Figure 3.1.16 Pressure losses with water at 50°C.. Pressure losses [mbar/m]. 0.004. 0.01. 0.02.

No results found